From sensys@cfpmail.info Sun Sep 1 19:00:39 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A1E9211E82DB for <6tsch@ietfa.amsl.com>; Sun, 1 Sep 2013 19:00:39 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.599 X-Spam-Level: X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id v+A95g-wZvwu for <6tsch@ietfa.amsl.com>; Sun, 1 Sep 2013 19:00:35 -0700 (PDT) Received: from mars.ucmerced.edu (smtp.andes.ucmerced.edu [169.236.151.100]) by ietfa.amsl.com (Postfix) with ESMTP id 13D9F11E819E for <6tsch@ietf.org>; Sun, 1 Sep 2013 19:00:34 -0700 (PDT) Received: from mars (localhost [169.236.151.100]) by mars.ucmerced.edu (Postfix) with ESMTP id D92F9C0D0E for <6tsch@ietf.org>; Sun, 1 Sep 2013 19:00:30 -0700 (PDT) Date: Sun, 1 Sep 2013 19:00:30 -0700 Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" To: 6tsch@ietf.org Content-Transfer-Encoding: quoted-printable From: SenSys Publicity Message-Id: <20130902020030.D92F9C0D0E@mars.ucmerced.edu> Subject: [6tsch] CFP: SenseMine 2013 (co-located with SenSys'13) X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Sep 2013 02:00:39 -0000 [ ** Please excuse any duplicates you may receive ** ] Note: Submission deadline fast approaching. =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D SenseMine 2013 First International Workshop on Sensing and Big Data Mining in conjunction with SenSys 2013 November 14, 2013 Rome, Italy Important Dates: Submission deadline: September 6, 2013, 11:59 PM EDT Notification of acceptance: October 10, 2013 Technical Program Committee Chairs: Emiliano Miluzzo, AT&T Labs Research Deepak S. Turaga, IBM Research Technical Program Committee (Preliminary): Deborah Estrin (Cornell) Andrew Campbell (Dartmouth College) Yanyong Zhang (Rutgers University) Marco Conti (CNR Italy) Immanuel Schweizer (Technische Universitat Darmstadt) Jing Gao (SUNY Buffalo) Wei Fan (Huawei) Tarek Abdelzahar (UIUC) Charu Aggarwal (IBM Research) The numbers and modalities of digital information sources being captured to monitor our traffic, weather, power, personal context, goods, factories, utilities, ports, health, IT infrastructure, and social networks, is continuing to grow at an incredible rate. Commercial, government organizations, and individuals depend on the ability to automatically mine data from different types of sensor platforms (from large sensor networks to an individual's smartphone) in order to monitor, alert, learn from, and in some cases affect and control our surroundings. The research involved in developing applications for these classes of problems lies at the intersection of several diverse disciplines, including sensing systems, signal processing, machine learning and data mining, data management, and large-scale distributed systems - for both online as well as offline analysis. =E2=80=A0In this workshop, colocated wi= th AMC SenSys 2013, we will include state-of-the-art approaches and technical solutions in the area of extracting knowledge, by mining data from sensor networks in large-scale settings. The goal of the workshop is to establish a new research community and a venue for researchers, practitioners, and academics to present their results in these disciplines. We expect this workshop to be a long-term, continued venue for this research community, and to also lead to the setup of appropriate special issues and journals. As part of this workshop, we will include both peer-reviewed and invited papers. All accepted papers will be included in the workshop proceedings and the ACM digital library. Original contributions, previously unpublished, and not currently under review by another journal or conference, are solicited in relevant areas, including, but not limited to: * Mining data from large-scale sensor networks and smartphone sensing=20 deployments - Distributed, parallel, and scalable mining algorithms - Multi-modal mining algorithms - Resource-adaptive (power, network, compute) mining - Handling sparsely sampled data, noisy, and untrustworthy data - Mining big data collected from large-scale smartphone sensing deployments - Supporting visualization and user interaction=20 * Distributed Processing for Sensor - Network Data Distributed processing at edge and core of sensor=20 network - Stream processing systems, Hadoop/MapReduce, cloud, cross-platform computing =20=20=20=20 * Sensor Systems and Machine-to-Machine architecture Design - Large-scale sensor networks and Machine-to-Machine architectures - Smartphone sensing deployments for big data collection * Novel Applications of Mining Sensor Network Data: Energy, Healthcare, Security, Transportation, P2P Systems, Enterprise Environments, Social Networks, Smartphones Further Details: http://www2.research.att.com/sensemine2013/index.html =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D From sensys@cfpmail.info Mon Sep 2 23:03:40 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B269911E8183 for <6tsch@ietfa.amsl.com>; Mon, 2 Sep 2013 23:03:40 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.599 X-Spam-Level: X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[AWL=0.000, BAYES_00=-2.599] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6J3FXcZwQ95Z for <6tsch@ietfa.amsl.com>; Mon, 2 Sep 2013 23:03:36 -0700 (PDT) Received: from mars.ucmerced.edu (mailman.andes.ucmerced.edu [169.236.151.100]) by ietfa.amsl.com (Postfix) with ESMTP id A858B11E8118 for <6tsch@ietf.org>; Mon, 2 Sep 2013 23:03:28 -0700 (PDT) Received: from mars (localhost [169.236.151.100]) by mars.ucmerced.edu (Postfix) with ESMTP id E6F14C0C0C for <6tsch@ietf.org>; Mon, 2 Sep 2013 23:03:27 -0700 (PDT) Date: Mon, 2 Sep 2013 23:03:27 -0700 Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" To: 6tsch@ietf.org Content-Transfer-Encoding: quoted-printable From: SenSys Publicity Message-Id: <20130903060327.E6F14C0C0C@mars.ucmerced.edu> Subject: [6tsch] Call for Participation - SenSys 2013 Doctoral Colloquium X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Sep 2013 06:03:40 -0000 [ ** Please excuse any duplicates you may receive ** ] Note: Submission deadline extended to September 6th, 2013. SenSys 2013 Doctoral Colloquium November 13 November 2013 (afternoon), Rome, Italy. http://sensys.acm.org/2013/doccol.html The Doctoral Colloquium (DC) of SenSys'13 is to provide a friendly, supportive, and constructive environment where PhD students can present their research-in-progress for an open discussion guided by a panel of experienced researchers and practitioners. Applicants should be far enough into their PhD to have a concrete proposal, and have initially outlined the salient issues and proposed research methodology. Applicants should not be planning to submit their PhD thesis or dissertation for at least four months after the DC, so that any advice or input may still be incorporated into the doctoral work. The DC will be a half-day, seminar-style event, consisting of short presentations followed by round table discussion. Time will be allotted to each student not only for the presentation, but also for careful, in-depth consideration and discussion amongst the panelists and DC participants. In addition to the DC presentation, the participants will be given a chance to present a poster at the poster session during the main conference. Submissions Topic scope is the same as that listed in the SenSys call for papers. DC submissions should consist of a single PDF document using the SenSys paper template. The document should contain the following: Research summary (3 pages) describing the work in progress and including a 100-word abstract. Things to consider for inclusion in the research summary might be: the expected contribution to the field of sensor networking; the original idea or thesis statement; the problem domain and the specific problem addressed; a brief overview of related work; the methodological approach; research carried out and results so far. Student biographical sketch, including the names and affiliations of the research advisor(s), and expected date of dissertation submission. The submission site can be found at: https://sensys2013.cs.virginia.edu/doctoralCol/index.php Research summaries will be reviewed by the chairs and panel members. If the work is accepted, a student may be expected to make clarifications and improvements to the research summary by the camera-ready deadline. Note that the research summaries will not be formally published, but hard copies will be made available to colloquium delegates. A prize for best student presentation will be awarded by the panel. Registration Accepted participants of the doctoral colloquium shall register with the SenSys workshop registration rate (if applicable at the student rate). The registration is free if the student also attends and has registered for the SenSys conference. Participants can also apply for SenSys travel grants. Important Dates (all at 11:59pm PDT) Submission Deadline: September 6th, 2013 Notification of Acceptance: October 6, 2013 Camera-Ready: October 27, 2013 Colloquium: November 13, 2013 Organizers Chair Cecilia Mascolo, University of Cambridge Committee: Polly Huang, National Taiwan University, Taiwan Nic Lane, Microsoft Research Asia , China Andrew Markham, University of Oxford, UK Emiliano Miluzzo, AT&T, USA Luca Mottola, Politecnico di Milano Italy & SICS Sweden Anthony Rowe, CMU, USA Silvia Santini Technische Universitat Darmstadt, Germany Sasu Tarkoma University of Helsinki, Finland From twatteyne@gmail.com Tue Sep 3 18:59:47 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 19C0221E811D for <6tsch@ietfa.amsl.com>; Tue, 3 Sep 2013 18:59:47 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.892 X-Spam-Level: X-Spam-Status: No, score=-1.892 tagged_above=-999 required=5 tests=[AWL=0.085, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KfYMKjGEL6T4 for <6tsch@ietfa.amsl.com>; Tue, 3 Sep 2013 18:59:46 -0700 (PDT) Received: from mail-pb0-x232.google.com (mail-pb0-x232.google.com [IPv6:2607:f8b0:400e:c01::232]) by ietfa.amsl.com (Postfix) with ESMTP id BF5FE21E811A for <6tsch@ietf.org>; Tue, 3 Sep 2013 18:59:38 -0700 (PDT) Received: by mail-pb0-f50.google.com with SMTP id uo5so6677218pbc.23 for <6tsch@ietf.org>; Tue, 03 Sep 2013 18:59:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=2evUn4mc+VXGjoX4TvQpf6n6dhFn6tOQn4UyRSQqHTg=; b=fYwUaT3U5EDgRJ8YNs9qRFo1o3FxA9nlGquFVu4dWpv/a1sZVSL0IeXh4xgbpvePGJ CX+LI/IqxTM+vv+BA5QOGce0RFAFGVfq/EJ+P4mHYNCFk/ErzSSJtkV1qecBLF4wNJqI 2qyT0fYYfSxy4ZbokbJ//fs7l50/nGlDRPZM0rXAycHQJDEniw6yNvSXSSBRx1vpQqMJ +vJPk9RdFm5cuMOfl7kVbTU0qzOsvn6oEQVboG5JFBOZ7VSPhqBHmSZ7x4HTVtowUxfH W/exUQw0LpPfNrqbnAc8ojrCsFPZzrgz6Ots4guup7gnBXEoha5DlDQ2Qq0o7lnXdRoZ GS/g== X-Received: by 10.66.120.145 with SMTP id lc17mr419077pab.182.1378259975005; Tue, 03 Sep 2013 18:59:35 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Tue, 3 Sep 2013 18:59:14 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Tue, 3 Sep 2013 18:59:14 -0700 X-Google-Sender-Auth: 6_sfP5zf3JGsUo5Q9oHBcNuyQdg Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=e89a8ffbaca137ebb204e585284e Subject: Re: [6tsch] Confirmation Messages? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2013 01:59:47 -0000 --e89a8ffbaca137ebb204e585284e Content-Type: text/plain; charset=ISO-8859-1 Qin, all, *[I hope you enjoyed the long week-end (here in the US) as much as I did!]* As Maria Rita pointed out during the call on Friday, let's try to make absolutely sure we don't over-complicate things. I believe I agree with the fact that different flows might have different requirements. Link-layer ACKs can guarantee a level of reliability acceptable to some flows, but it certainly would be better to have an end-to-end confirmation for others. My vote would go for using the underlying "transport" mechanism to provide us with some confirmation capabilities. If we take the example of CoAP, we could say that action and query flows MUST use confirmable messages, while report and event MAY. CoAP would also allow us to switch between piggy-backing the response in the ACK for the query flow. The advantage is that we do not have to reinvent this "transport" mechanism. The mechanism for triggering an ACK, timing out and retransmitting, etc, is already done for us. Thoughts? Thomas On Fri, Aug 30, 2013 at 10:47 AM, Qin Wang wrote: > Hi all, > > In this thread, we will continue the discussion about Confirmation > message. Here is some background information. > > Context: e.g. > - node sends a report and want to know if the report is accepted., > - ME sends a action request and want to know if/when the action taken. > Options: > (1) Nothing > (2) Rely on transport mechanism (e.g. confirmable CoAP message) > (3) App-level ACK type > (4) Use different flow (i.e. action flow) > > IMHO, different control flow may have different requirement for > confirmation message. > (1) Action Flow, needs a App-level confirmation, like Succ/Fail > (2) Query Flow, automatically has the confirmation, i.e. the message > packet corresponding to a specific query. > (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer > option (1) and (3), i.e. the confirmation message is an option, but if a > confirmation message is needed, it should be App-level Ack, instead of > transport layer confirmation, which will give 6top more flexibility. > > What do you think? > > Thanks > Qin > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --e89a8ffbaca137ebb204e585284e Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Qin, all,

[I hope you enjoyed the lo= ng week-end (here in the US) as much as I did!]

As Maria Rita pointed out during the call on Friday, let's try to mak= e absolutely sure we don't over-complicate things. I believe I agree wi= th the fact that different flows might have different requirements. Link-la= yer ACKs can guarantee a level of reliability acceptable to some flows, but= it certainly would be better to have an end-to-end confirmation for others= .

My vote would go for using the underlying "transpo= rt" mechanism to provide us with some confirmation capabilities. If we= take the example of CoAP, we could say that action and query flows MUST us= e confirmable messages, while report and event MAY. CoAP would also allow u= s to switch between piggy-backing the response in the ACK for the query flo= w.

The advantage is that we do not have to reinvent this &= quot;transport" mechanism. The mechanism for triggering an ACK, timing= out and retransmitting, etc, is already done for us.

Thoughts?

Thomas


On Fri, Aug 30, 2013 at 10:47 = AM, Qin Wang <qinwang@berkeley.edu> wrote:
Hi all,

In this thread, we will continue the discussion about Confirmation message= . Here is some background information.

Context: e.g.
=A0 =A0 - node sends a report a= nd want to know if the report is accepted.,=A0
=A0 =A0 - ME sends a action request and want to know if/when the action ta= ken.
Options:
=A0 =A0(1) Nothing
=A0 =A0(2) Rely on transpo= rt mechanism (e.g. confirmable CoAP message)
=A0 =A0(3) App-level ACK type
=A0 =A0(4) Use different flow (i.e. action flow)

IMHO, different control flow may have different requirement f= or confirmation message.
=A0 =A0 (1) Action Flow, needs a App-level confirmation, like Succ/Fail
=A0 =A0 (2) Query Flow, automatically has the confirmation, i.e. the messa= ge packet corresponding to a specific query.
=A0 =A0 (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefe= r option (1) and (3), i.e. the confirmation message is an option, but if a = confirmation message is needed, it should be App-level Ack, instead of tran= sport layer confirmation, which will give 6top more flexibility.

What do you think?

Thanks
Qin
=A0 = =A0=A0

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--e89a8ffbaca137ebb204e585284e-- From twatteyne@gmail.com Tue Sep 3 19:08:32 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 74A5721E8128 for <6tsch@ietfa.amsl.com>; Tue, 3 Sep 2013 19:08:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.895 X-Spam-Level: X-Spam-Status: No, score=-1.895 tagged_above=-999 required=5 tests=[AWL=0.082, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0vOpo3ZE+Ddw for <6tsch@ietfa.amsl.com>; Tue, 3 Sep 2013 19:08:31 -0700 (PDT) Received: from mail-pa0-x235.google.com (mail-pa0-x235.google.com [IPv6:2607:f8b0:400e:c03::235]) by ietfa.amsl.com (Postfix) with ESMTP id B6E9B21E811A for <6tsch@ietf.org>; Tue, 3 Sep 2013 19:08:31 -0700 (PDT) Received: by mail-pa0-f53.google.com with SMTP id lb1so7190389pab.40 for <6tsch@ietf.org>; Tue, 03 Sep 2013 19:08:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=vO6uYRsXnF18tCMN31G4vIWgovEmxVhD/R004hfx5Zo=; b=QtFi8CBHt3zRQXylqOOfZWPzR8hxDENHCmXTPqc8HKPq1gZ7rnPru+lXGuTYxSUDLn gICNDW4hZbD4dm1s8Zcnp/XIZ/RxAvmWCnKoXGe/2z2yPPaTj8cXhdT1JQIXhzq40Y85 6Khfkt+GX95J1m4M6F8DX7gUytjSy/dZI4J5lS/k3CbNEZ9S9HF8XfwqwciUNP6nyCT7 g2cA+knYF374yYluP8OdFWUtgzSlS3ukfhbTe6An8/0tsCoWCzIh04QnIW0udUpN8Yho GyE8PKlUa1++1qN/6vT6LJ9Y4+gq3VX89Ib9XKFsnFlVoYci8feUzIiCuEkX5EGX3XPi zyyg== X-Received: by 10.66.142.107 with SMTP id rv11mr645520pab.17.1378260511455; Tue, 03 Sep 2013 19:08:31 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Tue, 3 Sep 2013 19:08:11 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Tue, 3 Sep 2013 19:08:11 -0700 X-Google-Sender-Auth: Z5oxtw3x-5henxg98aeBaZ9jHAM Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=001a11331e463181d804e585487f Subject: Re: [6tsch] Confirmation Messages? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2013 02:08:32 -0000 --001a11331e463181d804e585487f Content-Type: text/plain; charset=ISO-8859-1 One last thought: http://tools.ietf.org/html/draft-ietf-core-observe-09 might come in handy for the report flow for example. On Tue, Sep 3, 2013 at 6:59 PM, Thomas Watteyne wrote: > Qin, all, > > *[I hope you enjoyed the long week-end (here in the US) as much as I did!] > * > > As Maria Rita pointed out during the call on Friday, let's try to make > absolutely sure we don't over-complicate things. I believe I agree with the > fact that different flows might have different requirements. Link-layer > ACKs can guarantee a level of reliability acceptable to some flows, but it > certainly would be better to have an end-to-end confirmation for others. > > My vote would go for using the underlying "transport" mechanism to provide > us with some confirmation capabilities. If we take the example of CoAP, we > could say that action and query flows MUST use confirmable messages, while > report and event MAY. CoAP would also allow us to switch between > piggy-backing the response in the ACK for the query flow. > > The advantage is that we do not have to reinvent this "transport" > mechanism. The mechanism for triggering an ACK, timing out and > retransmitting, etc, is already done for us. > > Thoughts? > > Thomas > > > On Fri, Aug 30, 2013 at 10:47 AM, Qin Wang wrote: > >> Hi all, >> >> In this thread, we will continue the discussion about Confirmation >> message. Here is some background information. >> >> Context: e.g. >> - node sends a report and want to know if the report is accepted., >> - ME sends a action request and want to know if/when the action taken. >> Options: >> (1) Nothing >> (2) Rely on transport mechanism (e.g. confirmable CoAP message) >> (3) App-level ACK type >> (4) Use different flow (i.e. action flow) >> >> IMHO, different control flow may have different requirement for >> confirmation message. >> (1) Action Flow, needs a App-level confirmation, like Succ/Fail >> (2) Query Flow, automatically has the confirmation, i.e. the message >> packet corresponding to a specific query. >> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer >> option (1) and (3), i.e. the confirmation message is an option, but if a >> confirmation message is needed, it should be App-level Ack, instead of >> transport layer confirmation, which will give 6top more flexibility. >> >> What do you think? >> >> Thanks >> Qin >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > --001a11331e463181d804e585487f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
One last thought:=A0http://tools.ietf.org/html/draft-ietf-core-obse= rve-09=A0might come in handy for the report flow for example.


On Tue, Sep 3, 2013 at 6:59 PM, Thomas W= atteyne <watteyne@eecs.berkeley.edu> wrote:
Qin, all,

[I hope you enjoyed the lo= ng week-end (here in the US) as much as I did!]

As Maria Rita pointed out during the call on Friday, let's try to mak= e absolutely sure we don't over-complicate things. I believe I agree wi= th the fact that different flows might have different requirements. Link-la= yer ACKs can guarantee a level of reliability acceptable to some flows, but= it certainly would be better to have an end-to-end confirmation for others= .

My vote would go for using the underlying "transpo= rt" mechanism to provide us with some confirmation capabilities. If we= take the example of CoAP, we could say that action and query flows MUST us= e confirmable messages, while report and event MAY. CoAP would also allow u= s to switch between piggy-backing the response in the ACK for the query flo= w.

The advantage is that we do not have to reinvent this &= quot;transport" mechanism. The mechanism for triggering an ACK, timing= out and retransmitting, etc, is already done for us.

Thoughts?

Thomas


On Fri,= Aug 30, 2013 at 10:47 AM, Qin Wang <qinwang@berkeley.edu> wrote:
Hi all,=

In this thread, we will continue the discussion about Confirmation message= . Here is some background information.

Context: e.g.
=A0 =A0 - node sends a report a= nd want to know if the report is accepted.,=A0
=A0 =A0 - ME sends a action request and want to know if/when the action ta= ken.
Options:
=A0 =A0(1) Nothing
=A0 =A0(2) Rely on transpo= rt mechanism (e.g. confirmable CoAP message)
=A0 =A0(3) App-level ACK type
=A0 =A0(4) Use different flow (i.e. action flow)

IMHO, different control flow may have different requirement f= or confirmation message.
=A0 =A0 (1) Action Flow, needs a App-level confirmation, like Succ/Fail
=A0 =A0 (2) Query Flow, automatically has the confirmation, i.e. the messa= ge packet corresponding to a specific query.
=A0 =A0 (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefe= r option (1) and (3), i.e. the confirmation message is an option, but if a = confirmation message is needed, it should be App-level Ack, instead of tran= sport layer confirmation, which will give 6top more flexibility.

What do you think?

Thanks
Qin
=A0 = =A0=A0

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



--001a11331e463181d804e585487f-- From twatteyne@gmail.com Tue Sep 3 19:13:22 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A3BF321E80D9 for <6tsch@ietfa.amsl.com>; Tue, 3 Sep 2013 19:13:22 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.597 X-Spam-Level: X-Spam-Status: No, score=-1.597 tagged_above=-999 required=5 tests=[AWL=-0.220, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_34=0.6, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id drok1mmePxPR for <6tsch@ietfa.amsl.com>; Tue, 3 Sep 2013 19:13:22 -0700 (PDT) Received: from mail-pb0-x230.google.com (mail-pb0-x230.google.com [IPv6:2607:f8b0:400e:c01::230]) by ietfa.amsl.com (Postfix) with ESMTP id 10FE521F99BD for <6tsch@ietf.org>; Tue, 3 Sep 2013 19:13:21 -0700 (PDT) Received: by mail-pb0-f48.google.com with SMTP id ma3so6676438pbc.7 for <6tsch@ietf.org>; Tue, 03 Sep 2013 19:13:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=sS/uV9w3cqzAZsFdoDw+g/yS360EVFmphOzsxHn6U4o=; b=mAFqikYkkA3vILDNIJzwb9mi6sOdbKR60XwOpwycq+1QG+P1qU0kNzdoT+yxPI72VK z/STu4gunk70h4BByziUVQbC2Xa2HTSJA0vUC7XYZ+TCUVRis0b7dHyDP0PRSSibTJiL 0IN+evognzDqy0mSJ7poUGcEc+bSATYjeI4kuxQSll/3/1yDJGdVkCPKyGW9/E6r81k4 mPITE1GjMaaehzLFo7K4W3j2ytjbBPSIOaqH2bU8/OaQ9/RCsUeVBkByUVs/4ScsKJvg 5UrlVYy77suU0/I0HB1juQZxfgCgciWdpBH+93wttXUx+ZOgTYglJEBTcDr12gLTK2tc Ga/w== X-Received: by 10.68.4.197 with SMTP id m5mr596321pbm.46.1378260799628; Tue, 03 Sep 2013 19:13:19 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Tue, 3 Sep 2013 19:12:59 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Tue, 3 Sep 2013 19:12:59 -0700 X-Google-Sender-Auth: inmMNDvQWJPx6dCWvozHryDm5H4 Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=bcaec52154e15eb00604e5855901 Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2013 02:13:22 -0000 --bcaec52154e15eb00604e5855901 Content-Type: text/plain; charset=ISO-8859-1 Qin, Thanks for bringing that up. Allow me to answer in Pascal's place. We are talking about the format of the packets exchanged between the ME and the nodes. In the centralized case, these are application-level packets, i.e. packet generated by an entity a couple of layer above 6top. That entity talks with the PCE over the network, and with 6top through the API (internal to the node) as defined in http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4. If we agree on that, the question is whether the packet the node sends to establish a new track is part of the event flow, or not. In both cases, it would originate from this application-level entity, but possibly transported in different ways. Thomas On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang wrote: > Hi Pascal, > > My understanding is that 6top is a passive role in dealing with cell/track > reservation. In another word, the 6top in a node can report its state, > including neighbor table, cell usage, and other statistics information, but > can not make decision on if some cells/track should be added or removed, > which should be the responsibility of PCE in centralized case or upper > layer in distributed case. Thus, I can not see when the 5th flow will be > used. Can you explain more? > > Thanks > Qin > > > On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) < > pthubert@cisco.com> wrote: > >> Dear all, >> >> We discussed at the call that the(PCEP?) request to ask for a track >> establishment could be seen as an event, or could be a new flow. >> At the call, I suggested that it could be a new, 5th flow. My arguments >> are that this flow: >> - Probably yields different data format. The demand carries and points, >> end to end latency and bandwidth. That's quite specific. >> - Probably yields a different flow. Events do not necessarily have a >> response. >> - Probably uses a different transport as well (PCEP vs. CoAP) >> >> What do you think? >> >> Pascal >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch --bcaec52154e15eb00604e5855901 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Qin,

Thanks for bringing that up. Allow= me to answer in Pascal's place. We are talking about the format of the= packets exchanged between the ME and the nodes. In the centralized case, t= hese are application-level packets, i.e. packet generated by an entity a co= uple of layer above 6top. That entity talks with the PCE over the network, = and with 6top through the API (internal to the node) as defined in=A0http:= //tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4.

If we agree on that, the question is whether the packet= the node sends to establish a new track is part of the event flow, or not.= In both cases, it would originate from this application-level entity, but = possibly transported in different ways.

Thomas

On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang <qinwang@be= rkeley.edu> wrote:
Hi Pascal,

My understa= nding is that 6top is a passive role in dealing with cell/track reservation= . In another word, the 6top in a node can report its state, including neigh= bor table, cell usage, and other statistics information, but can not make d= ecision on if some cells/track should be added or removed, which should be = the responsibility of PCE in centralized case or upper layer in distributed= case. Thus, I can not see when the 5th flow will be used. Can you explain = more?

Thanks
Qin


On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthuber= t) <pthubert@cisco.com> wrote:
Dear all,

We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow.
At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow:
- Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific.
- Probably yields a different flow. Events do not necessarily have a respon= se.
- Probably uses a different transport as well (PCEP vs. CoAP)

What do you think?

Pascal
_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch
--bcaec52154e15eb00604e5855901-- From xvilajosana@berkeley.edu Tue Sep 3 20:55:56 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DBA0821E817D for <6tsch@ietfa.amsl.com>; Tue, 3 Sep 2013 20:55:55 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.729 X-Spam-Level: X-Spam-Status: No, score=-2.729 tagged_above=-999 required=5 tests=[AWL=0.247, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id p3jVtGqkWBM2 for <6tsch@ietfa.amsl.com>; Tue, 3 Sep 2013 20:55:51 -0700 (PDT) Received: from mail-pa0-f52.google.com (mail-pa0-f52.google.com [209.85.220.52]) by ietfa.amsl.com (Postfix) with ESMTP id C950621E8172 for <6tsch@ietf.org>; Tue, 3 Sep 2013 20:55:46 -0700 (PDT) Received: by mail-pa0-f52.google.com with SMTP id kq13so7284079pab.39 for <6tsch@ietf.org>; Tue, 03 Sep 2013 20:55:41 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=BPgenrPbQ7pwz3An5eW2z70C7R1N8blrL0RGw3dFFxU=; b=CmwpNc7/QTJhZ3Hf4iyu1IMUb1IXmEJ/753s3HaZGzsfOm9msq+0oXl4Ct1i2KONjZ 7XvUkNV9/ih6kfODQrQ+goXIhmCkFMhWZakVc4KNujaocSEny9s4K+g5bEtAqsdpW3TK 84aaf7O8QcV6Axjj8TFTRsxJcsFkdnz/MBrLZkryDa+ZVG7IAWLd8nfF4k90c4kBNgdp Ai00RY1jI10ZI7aivxmQzdZwbRbEj3ekGGI7pZ52ztadiFUz03GOzQqJUyJ6drvpmadJ C+5Vul+kdP2KiGMbL9yZTRckGYB5+WotD3/GB1eyywLHMSgHGH+kAh77NpU+yyasUlpf /RvQ== X-Gm-Message-State: ALoCoQn8q96IayJTofw9SGm75z4xDXRurCnmU4Czjtr/bAL1Z/8S5E5S4kidWsEjogMHifuXrSbr MIME-Version: 1.0 X-Received: by 10.68.218.132 with SMTP id pg4mr618727pbc.200.1378266938113; Tue, 03 Sep 2013 20:55:38 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Tue, 3 Sep 2013 20:55:37 -0700 (PDT) In-Reply-To: References: Date: Tue, 3 Sep 2013 20:55:37 -0700 Message-ID: From: Xavier Vilajosana Guillen To: Thomas Watteyne Content-Type: multipart/alternative; boundary=e89a8ffbaaf5408f9304e586c7fd Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] Confirmation Messages? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2013 03:55:56 -0000 --e89a8ffbaaf5408f9304e586c7fd Content-Type: text/plain; charset=ISO-8859-1 I completely agree with that. Having confirmations done by transport protocols simplifies our work and we do not need to re-invent the wheel. so +1 for that. X On Tue, Sep 3, 2013 at 7:08 PM, Thomas Watteyne wrote: > One last thought: http://tools.ietf.org/html/draft-ietf-core-observe-09 might > come in handy for the report flow for example. > > > On Tue, Sep 3, 2013 at 6:59 PM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote: > >> Qin, all, >> >> *[I hope you enjoyed the long week-end (here in the US) as much as I >> did!]* >> >> As Maria Rita pointed out during the call on Friday, let's try to make >> absolutely sure we don't over-complicate things. I believe I agree with the >> fact that different flows might have different requirements. Link-layer >> ACKs can guarantee a level of reliability acceptable to some flows, but it >> certainly would be better to have an end-to-end confirmation for others. >> >> My vote would go for using the underlying "transport" mechanism to >> provide us with some confirmation capabilities. If we take the example of >> CoAP, we could say that action and query flows MUST use confirmable >> messages, while report and event MAY. CoAP would also allow us to switch >> between piggy-backing the response in the ACK for the query flow. >> >> The advantage is that we do not have to reinvent this "transport" >> mechanism. The mechanism for triggering an ACK, timing out and >> retransmitting, etc, is already done for us. >> >> Thoughts? >> >> Thomas >> >> >> On Fri, Aug 30, 2013 at 10:47 AM, Qin Wang wrote: >> >>> Hi all, >>> >>> In this thread, we will continue the discussion about Confirmation >>> message. Here is some background information. >>> >>> Context: e.g. >>> - node sends a report and want to know if the report is accepted., >>> - ME sends a action request and want to know if/when the action >>> taken. >>> Options: >>> (1) Nothing >>> (2) Rely on transport mechanism (e.g. confirmable CoAP message) >>> (3) App-level ACK type >>> (4) Use different flow (i.e. action flow) >>> >>> IMHO, different control flow may have different requirement for >>> confirmation message. >>> (1) Action Flow, needs a App-level confirmation, like Succ/Fail >>> (2) Query Flow, automatically has the confirmation, i.e. the message >>> packet corresponding to a specific query. >>> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer >>> option (1) and (3), i.e. the confirmation message is an option, but if a >>> confirmation message is needed, it should be App-level Ack, instead of >>> transport layer confirmation, which will give 6top more flexibility. >>> >>> What do you think? >>> >>> Thanks >>> Qin >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >> > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --e89a8ffbaaf5408f9304e586c7fd Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
I completely agree with that. Having confirmations done by= transport protocols simplifies our work and we do not need to re-invent th= e wheel.=A0

so +1 for that.
X


On Tue, Sep 3, 2013 at 7:08 PM, Thomas W= atteyne <watteyne@eecs.berkeley.edu> wrote:
One last thought:=A0http://tools.ietf.org/html/dr= aft-ietf-core-observe-09=A0might come in handy for the report flow for = example.


On Tue, Sep 3, 2013 at 6:59 PM, Thomas W= atteyne <watteyne@eecs.berkeley.edu> wrote:
Qin, all,

[I hope you enjoyed the lo= ng week-end (here in the US) as much as I did!]

As Maria Rita pointed out during the call on Friday, let's try to mak= e absolutely sure we don't over-complicate things. I believe I agree wi= th the fact that different flows might have different requirements. Link-la= yer ACKs can guarantee a level of reliability acceptable to some flows, but= it certainly would be better to have an end-to-end confirmation for others= .

My vote would go for using the underlying "transpo= rt" mechanism to provide us with some confirmation capabilities. If we= take the example of CoAP, we could say that action and query flows MUST us= e confirmable messages, while report and event MAY. CoAP would also allow u= s to switch between piggy-backing the response in the ACK for the query flo= w.

The advantage is that we do not have to reinvent this &= quot;transport" mechanism. The mechanism for triggering an ACK, timing= out and retransmitting, etc, is already done for us.

Thoughts?

Thomas


On Fri, Aug 30, 2013= at 10:47 AM, Qin Wang <qinwang@berkeley.edu> wrote:
Hi all,

In this thread, we will continue the discussion about Confirmation message= . Here is some background information.

Context: e.g.
=A0 =A0 - node sends a report a= nd want to know if the report is accepted.,=A0
=A0 =A0 - ME sends a action request and want to know if/when the action ta= ken.
Options:
=A0 =A0(1) Nothing
=A0 =A0(2) Rely on transpo= rt mechanism (e.g. confirmable CoAP message)
=A0 =A0(3) App-level ACK type
=A0 =A0(4) Use different flow (i.e. action flow)

IMHO, different control flow may have different requirement f= or confirmation message.
=A0 =A0 (1) Action Flow, needs a App-level confirmation, like Succ/Fail
=A0 =A0 (2) Query Flow, automatically has the confirmation, i.e. the messa= ge packet corresponding to a specific query.
=A0 =A0 (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefe= r option (1) and (3), i.e. the confirmation message is an option, but if a = confirmation message is needed, it should be App-level Ack, instead of tran= sport layer confirmation, which will give 6top more flexibility.

What do you think?

Thanks
Qin
=A0 = =A0=A0

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch




_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--e89a8ffbaaf5408f9304e586c7fd-- From pthubert@cisco.com Wed Sep 4 06:59:51 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E3CF811E81B5 for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 06:59:50 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.515 X-Spam-Level: X-Spam-Status: No, score=-10.515 tagged_above=-999 required=5 tests=[AWL=0.083, BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ajSk4b5MtFK9 for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 06:59:42 -0700 (PDT) Received: from rcdn-iport-7.cisco.com (rcdn-iport-7.cisco.com [173.37.86.78]) by ietfa.amsl.com (Postfix) with ESMTP id D673421E80C2 for <6tsch@ietf.org>; Wed, 4 Sep 2013 06:59:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=19817; q=dns/txt; s=iport; t=1378303182; x=1379512782; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=K170hE5UpxdVL+0x1A/yfaYk2fCpLW7VCCW45T/CZ6o=; b=m9/9NGmSDlqHdCkkZ94yPplJICEWZcSBFgnQAn1Wb5rlOehpzmvF+B6n /bSWUJ5rIrNffUKS6MaFV6lX9sEKZrVsIRpNIpKD0c8JVZxlWzXnVz8kE 6c6fww5z6V9QHUTrNjv2IIf26my937UpY9/ve/9deO22csBna7uy+XinK k=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgYFADg8J1KtJXG9/2dsb2JhbABaDoI1RDVRuHmIPIElFnSCJAEBAQQBAQEqQQsQAgEIEQQBAQsdBycLFAkIAgQBDQUIh3oMuWCPRS0EBgEGgxeBAAOFS5NZkDeCYT+CKg X-IronPort-AV: E=Sophos;i="4.89,1021,1367971200"; d="scan'208,217";a="255462529" Received: from rcdn-core2-2.cisco.com ([173.37.113.189]) by rcdn-iport-7.cisco.com with ESMTP; 04 Sep 2013 13:59:41 +0000 Received: from xhc-aln-x12.cisco.com (xhc-aln-x12.cisco.com [173.36.12.86]) by rcdn-core2-2.cisco.com (8.14.5/8.14.5) with ESMTP id r84Dxe4J027068 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Wed, 4 Sep 2013 13:59:40 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-aln-x12.cisco.com ([173.36.12.86]) with mapi id 14.02.0318.004; Wed, 4 Sep 2013 08:59:40 -0500 From: "Pascal Thubert (pthubert)" To: "xvilajosana@eecs.berkeley.edu" , "Thomas Watteyne" Thread-Topic: [6tsch] Confirmation Messages? Thread-Index: AQHOqRJzJXo6U5vsdkuQmcF5S00PbJm1KOKAgAAeBICAAE2+YA== Date: Wed, 4 Sep 2013 13:59:39 +0000 Deferred-Delivery: Wed, 4 Sep 2013 13:59:00 +0000 Message-ID: References: In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.55.22.2] Content-Type: multipart/alternative; boundary="_000_E045AECD98228444A58C61C200AE1BD841458668xmbrcdx01ciscoc_" MIME-Version: 1.0 Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] Confirmation Messages? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2013 13:59:51 -0000 --_000_E045AECD98228444A58C61C200AE1BD841458668xmbrcdx01ciscoc_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I agree too. To be very clear: We'll note that sometimes the confirmation of a request is indirect, like a= request may trigger a flow and observing the flow is a confirmation that t= he request was received. Or there must be an app layer answer and observing= that answer is a confirmation that the request went through. ISA100.11a tr= ansactions that really need an ack obey this model, and TCP level acks woul= d just have been a waste of energy. That's a reason why we did not go for T= CP but used UDP instead, using the app layer response as implicit acks, and= deferring to the app layer whether and how to manage retries (based on RFC= 2988). With 6TiSCH, we also expect to use UDP (below CoAP) as a transport, so ther= e is no real transport level ack -like a TCP ack- that would waste resource= s. For all I know we're probably well covered with the flows that CoAP enab= les, whether we want an acknowledgement or not, or whether the response is = the acknowledgement that we are after. Cheers, Pascal From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of X= avier Vilajosana Guillen Sent: mercredi 4 septembre 2013 05:56 To: Thomas Watteyne Cc: 6tsch@ietf.org Subject: Re: [6tsch] Confirmation Messages? I completely agree with that. Having confirmations done by transport protoc= ols simplifies our work and we do not need to re-invent the wheel. so +1 for that. X On Tue, Sep 3, 2013 at 7:08 PM, Thomas Watteyne > wrote: One last thought: http://tools.ietf.org/html/draft-ietf-core-observe-09 mig= ht come in handy for the report flow for example. On Tue, Sep 3, 2013 at 6:59 PM, Thomas Watteyne > wrote: Qin, all, [I hope you enjoyed the long week-end (here in the US) as much as I did!] As Maria Rita pointed out during the call on Friday, let's try to make abso= lutely sure we don't over-complicate things. I believe I agree with the fac= t that different flows might have different requirements. Link-layer ACKs c= an guarantee a level of reliability acceptable to some flows, but it certai= nly would be better to have an end-to-end confirmation for others. My vote would go for using the underlying "transport" mechanism to provide = us with some confirmation capabilities. If we take the example of CoAP, we = could say that action and query flows MUST use confirmable messages, while = report and event MAY. CoAP would also allow us to switch between piggy-back= ing the response in the ACK for the query flow. The advantage is that we do not have to reinvent this "transport" mechanism= . The mechanism for triggering an ACK, timing out and retransmitting, etc, = is already done for us. Thoughts? Thomas On Fri, Aug 30, 2013 at 10:47 AM, Qin Wang > wrote: Hi all, In this thread, we will continue the discussion about Confirmation message.= Here is some background information. Context: e.g. - node sends a report and want to know if the report is accepted., - ME sends a action request and want to know if/when the action taken. Options: (1) Nothing (2) Rely on transport mechanism (e.g. confirmable CoAP message) (3) App-level ACK type (4) Use different flow (i.e. action flow) IMHO, different control flow may have different requirement for confirmatio= n message. (1) Action Flow, needs a App-level confirmation, like Succ/Fail (2) Query Flow, automatically has the confirmation, i.e. the message pa= cket corresponding to a specific query. (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer opt= ion (1) and (3), i.e. the confirmation message is an option, but if a confi= rmation message is needed, it should be App-level Ack, instead of transport= layer confirmation, which will give 6top more flexibility. What do you think? Thanks Qin _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_E045AECD98228444A58C61C200AE1BD841458668xmbrcdx01ciscoc_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I agree too.

 <= /p>

To be very clear:

 <= /p>

We’ll note that som= etimes the confirmation of a request is indirect, like a request may trigge= r a flow and observing the flow is a confirmation that the request was received. Or there must be an app layer answer and observing that answ= er is a confirmation that the request went through. ISA100.11a transactions= that really need an ack obey this model, and TCP level acks would just hav= e been a waste of energy. That’s a reason why we did not go for TCP but used UDP instead, using the app lay= er response as implicit acks, and deferring to the app layer whether and ho= w to manage retries (based on RFC 2988).

 <= /p>

With 6TiSCH, we also expe= ct to use UDP (below CoAP) as a transport, so there is no real transport le= vel ack –like a TCP ack- that would waste resources. For all I know we’re probably well covered with the flows that CoAP enab= les, whether we want an acknowledgement or not, or whether the response is = the acknowledgement that we are after.

 <= /p>

Cheers,=

 <= /p>

Pascal

 <= /p>

From: 6tsch-bo= unces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
Sent: mercredi 4 septembre 2013 05:56
To: Thomas Watteyne
Cc: 6tsch@ietf.org
Subject: Re: [6tsch] Confirmation Messages?

 

I completely agree with that. Having confirmations d= one by transport protocols simplifies our work and we do not need to re-inv= ent the wheel. 

 

so +1 for that.

X

 

On Tue, Sep 3, 2013 at 7:08 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

One last thought: http://tools.ietf.or= g/html/draft-ietf-core-observe-09 might come in handy for the repo= rt flow for example.

 

On Tue, Sep 3, 2013 at 6:59 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

Qin, all,

 

[I hope you enjoyed the long week-end (here in th= e US) as much as I did!]

 

As Maria Rita pointed out during the call on Friday,= let's try to make absolutely sure we don't over-complicate things. I belie= ve I agree with the fact that different flows might have different requirem= ents. Link-layer ACKs can guarantee a level of reliability acceptable to some flows, but it certainly would be= better to have an end-to-end confirmation for others.

 

My vote would go for using the underlying "tran= sport" mechanism to provide us with some confirmation capabilities. If= we take the example of CoAP, we could say that action and query flows MUST= use confirmable messages, while report and event MAY. CoAP would also allow us to switch between piggy-backing the re= sponse in the ACK for the query flow.

 

The advantage is that we do not have to reinvent thi= s "transport" mechanism. The mechanism for triggering an ACK, tim= ing out and retransmitting, etc, is already done for us.

 

Thoughts?

 

Thomas

 

On Fri, Aug 30, 2013 at 10:47 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi all,

 

In this thread, we = will continue the discussion about Confirmation message. Here is some backg= round information.

 

Context: e.g.

    - nod= e sends a report and want to know if the report is accepted., <= span style=3D"font-size:10.0pt;font-family:"Arial","sans-ser= if"">

    - ME = sends a action request and want to know if/when the action taken.

Options:

   (1) No= thing

   (2) Re= ly on transport mechanism (e.g. confirmable CoAP message)=

   (3) Ap= p-level ACK type

   (4) Us= e different flow (i.e. action flow)

 

IMHO, different con= trol flow may have different requirement for confirmation message.

    (1) A= ction Flow, needs a App-level confirmation, like Succ/Fail

    (2) Q= uery Flow, automatically has the confirmation, i.e. the message packet corr= esponding to a specific query.

    (3) R= eport Flow and Event Flow, option (1)-(3) are OK, but I prefer option (1) a= nd (3), i.e. the confirmation message is an option, but if a confirmation m= essage is needed, it should be App-level Ack, instead of transport layer confirmation, which will give 6top more flexibi= lity.

 

What do you think?<= /span>

 

Thanks

Qin

 = ;   

 

_____________________= __________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 

 


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 

--_000_E045AECD98228444A58C61C200AE1BD841458668xmbrcdx01ciscoc_-- From qinwang@berkeley.edu Wed Sep 4 14:12:32 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1CF8E11E810F for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 14:12:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.598 X-Spam-Level: X-Spam-Status: No, score=-2.598 tagged_above=-999 required=5 tests=[AWL=-0.222, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_34=0.6, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sdo75YQ2u0wk for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 14:12:28 -0700 (PDT) Received: from mail-vc0-f180.google.com (mail-vc0-f180.google.com [209.85.220.180]) by ietfa.amsl.com (Postfix) with ESMTP id EE72811E81F7 for <6tsch@ietf.org>; Wed, 4 Sep 2013 14:12:18 -0700 (PDT) Received: by mail-vc0-f180.google.com with SMTP id gf11so532523vcb.25 for <6tsch@ietf.org>; Wed, 04 Sep 2013 14:12:18 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=hhaH5TPr/gF6wtYXbYBSzMGNolgVGhSdS4gyXo+EC3A=; b=Cwe/Qxe1oJ3eb5bfkQfg/uwn32Bm/kdLnfMUJynlhCB0LWlrpdMjwgRV7+eApxwOyW 7jwbRljAb6ivo/GpMAw9Jb119OohQ5PibP/IhGS9mUBtEg6U4Cmk7sgAAG6TFdH2Gr/e P1xNUOP5AUYxHgp+57UwmGpZpOde3pDkSKup1BPe6ICb8PX+kCqhtNbditqhN1F+/cYo onru3uBeaZqShQSFOkjC+ad9BdWcCD4Q+49l5hDcRgyggPjLpsTokoVF1x2lGsKaGTcL kfF9itO45Xny7DhVGu/A7sZky6Vnazgq0/4cWtMEx4jrov1KqG+kIW9rk7RtV/1Os+j7 M+Zw== X-Gm-Message-State: ALoCoQlznp5YZS9Vh18X5L3cWomeKL2aBaklhJ/Ua0JhL6yP4eNnHcSrMbCtLGU3I2jdq9Pnz28z MIME-Version: 1.0 X-Received: by 10.58.67.9 with SMTP id j9mr4441658vet.22.1378329138323; Wed, 04 Sep 2013 14:12:18 -0700 (PDT) Received: by 10.220.116.135 with HTTP; Wed, 4 Sep 2013 14:12:18 -0700 (PDT) In-Reply-To: References: Date: Thu, 5 Sep 2013 05:12:18 +0800 Message-ID: From: Qin Wang To: Thomas Watteyne Content-Type: multipart/alternative; boundary=047d7b339e07ac6df204e59542f8 Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2013 21:12:32 -0000 --047d7b339e07ac6df204e59542f8 Content-Type: text/plain; charset=ISO-8859-1 Hi Thomas, Thanks for your explanation. You are saying the request packet from node is generated by the upper layer of 6top, correct? If so, since the request packet is generated by upper layer of 6top, instead of 6top internal events like alarm, I think it is reasonable to add the 5th control flow. What do you think? Qin On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne wrote: > Qin, > > Thanks for bringing that up. Allow me to answer in Pascal's place. We are > talking about the format of the packets exchanged between the ME and the > nodes. In the centralized case, these are application-level packets, i.e. > packet generated by an entity a couple of layer above 6top. That entity > talks with the PCE over the network, and with 6top through the API > (internal to the node) as defined in > http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4. > > If we agree on that, the question is whether the packet the node sends to > establish a new track is part of the event flow, or not. In both cases, it > would originate from this application-level entity, but possibly > transported in different ways. > > Thomas > > On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang wrote: > >> Hi Pascal, >> >> My understanding is that 6top is a passive role in dealing with >> cell/track reservation. In another word, the 6top in a node can report its >> state, including neighbor table, cell usage, and other statistics >> information, but can not make decision on if some cells/track should be >> added or removed, which should be the responsibility of PCE in centralized >> case or upper layer in distributed case. Thus, I can not see when the 5th >> flow will be used. Can you explain more? >> >> Thanks >> Qin >> >> >> On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) < >> pthubert@cisco.com> wrote: >> >>> Dear all, >>> >>> We discussed at the call that the(PCEP?) request to ask for a track >>> establishment could be seen as an event, or could be a new flow. >>> At the call, I suggested that it could be a new, 5th flow. My arguments >>> are that this flow: >>> - Probably yields different data format. The demand carries and points, >>> end to end latency and bandwidth. That's quite specific. >>> - Probably yields a different flow. Events do not necessarily have a >>> response. >>> - Probably uses a different transport as well (PCEP vs. CoAP) >>> >>> What do you think? >>> >>> Pascal >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch > > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --047d7b339e07ac6df204e59542f8 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hi Thomas,

Thanks for your explanation.= You are saying the request packet from node is generated by the upper laye= r of 6top, correct?=A0

If so, since the request pa= cket is generated by upper layer of 6top, instead of 6top internal events l= ike alarm, I think it is reasonable to add the 5th control flow.

What do you think?

Qin


On Wed, S= ep 4, 2013 at 10:12 AM, Thomas Watteyne <watteyne@eecs.berkeley.e= du> wrote:
Qin,

Tha= nks for bringing that up. Allow me to answer in Pascal's place. We are = talking about the format of the packets exchanged between the ME and the no= des. In the centralized case, these are application-level packets, i.e. pac= ket generated by an entity a couple of layer above 6top. That entity talks = with the PCE over the network, and with 6top through the API (internal to t= he node) as defined in=A0http://tools.ietf.org/html/draf= t-wang-6tsch-6top-00#section-2.4.

If we agree on that, the question is whether the packet= the node sends to establish a new track is part of the event flow, or not.= In both cases, it would originate from this application-level entity, but = possibly transported in different ways.

Thomas

On Fri, Aug 30, 2013 at= 11:01 AM, Qin Wang <qinwang@berkeley.edu> wrote:
Hi Pascal,

My understa= nding is that 6top is a passive role in dealing with cell/track reservation= . In another word, the 6top in a node can report its state, including neigh= bor table, cell usage, and other statistics information, but can not make d= ecision on if some cells/track should be added or removed, which should be = the responsibility of PCE in centralized case or upper layer in distributed= case. Thus, I can not see when the 5th flow will be used. Can you explain = more?

Thanks
Qin


On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthuber= t) <pthubert@cisco.com> wrote:
Dear all,

We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow.
At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow:
- Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific.
- Probably yields a different flow. Events do not necessarily have a respon= se.
- Probably uses a different transport as well (PCEP vs. CoAP)

What do you think?

Pascal
_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--047d7b339e07ac6df204e59542f8-- From twatteyne@gmail.com Wed Sep 4 14:30:15 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3B48611E8205 for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 14:30:15 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.591 X-Spam-Level: X-Spam-Status: No, score=-1.591 tagged_above=-999 required=5 tests=[AWL=-0.214, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_34=0.6, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DS9RhWWHZgrf for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 14:30:14 -0700 (PDT) Received: from mail-pb0-x22b.google.com (mail-pb0-x22b.google.com [IPv6:2607:f8b0:400e:c01::22b]) by ietfa.amsl.com (Postfix) with ESMTP id 786BE11E8204 for <6tsch@ietf.org>; Wed, 4 Sep 2013 14:30:14 -0700 (PDT) Received: by mail-pb0-f43.google.com with SMTP id md4so870678pbc.30 for <6tsch@ietf.org>; Wed, 04 Sep 2013 14:30:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=rQ6bLGUVnAfqS4wHW4OhpFxIJSjET01aka50NjcS2eg=; b=AYDfWeYshZu/sUXdQjjIV+nsiBLkSNaFMb1K0rCMhlALq8MDj46Aflp+FRYPCyICyk 5qR1COrL+Yi53enk3JtHVsZyjpEf72iRhZ0FoisoIhs8/ZJ658xLDhxXoyvFf2x8Gt8/ 82aq72s847TioRyHEAq9WjXt2sMHkce/eCXn2v80LNOrsmzDJmKKxCeGPAmaTHLMEsnc QHeDWcYZ4i42qd+OR4JdOIQZWij21siBy6w7ziLru+nZj434Pyi2eROFVyj6uC9CTciM VDs6qS5gx0lkkG2YA7MKq0HRh5QILvPneyw84pDPQ5d6VuYgdeh+zL6c1aCLm6ymyslI QjtQ== X-Received: by 10.66.176.143 with SMTP id ci15mr5321768pac.146.1378330214198; Wed, 04 Sep 2013 14:30:14 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Wed, 4 Sep 2013 14:29:54 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Wed, 4 Sep 2013 14:29:54 -0700 X-Google-Sender-Auth: 7Nrn0tn3gtuLf5s8vh4U4KTbU-0 Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7bd75160ccf69d04e59582a4 Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2013 21:30:15 -0000 --047d7bd75160ccf69d04e59582a4 Content-Type: text/plain; charset=ISO-8859-1 I would agree that a 5th flow makes sense, especially because it allows us to use different transport mechanisms for the report flow (CoAP?) and this new flows (CoAP now? maybe PCEP later?). Do what do we call this new flow? "Schedule update request" is a bit long. Thomas On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang wrote: > Hi Thomas, > > Thanks for your explanation. You are saying the request packet from node > is generated by the upper layer of 6top, correct? > > If so, since the request packet is generated by upper layer of 6top, > instead of 6top internal events like alarm, I think it is reasonable to add > the 5th control flow. > > What do you think? > > Qin > > > On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote: > >> Qin, >> >> Thanks for bringing that up. Allow me to answer in Pascal's place. We are >> talking about the format of the packets exchanged between the ME and the >> nodes. In the centralized case, these are application-level packets, i.e. >> packet generated by an entity a couple of layer above 6top. That entity >> talks with the PCE over the network, and with 6top through the API >> (internal to the node) as defined in >> http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4. >> >> If we agree on that, the question is whether the packet the node sends to >> establish a new track is part of the event flow, or not. In both cases, it >> would originate from this application-level entity, but possibly >> transported in different ways. >> >> Thomas >> >> On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang wrote: >> >>> Hi Pascal, >>> >>> My understanding is that 6top is a passive role in dealing with >>> cell/track reservation. In another word, the 6top in a node can report its >>> state, including neighbor table, cell usage, and other statistics >>> information, but can not make decision on if some cells/track should be >>> added or removed, which should be the responsibility of PCE in centralized >>> case or upper layer in distributed case. Thus, I can not see when the 5th >>> flow will be used. Can you explain more? >>> >>> Thanks >>> Qin >>> >>> >>> On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) < >>> pthubert@cisco.com> wrote: >>> >>>> Dear all, >>>> >>>> We discussed at the call that the(PCEP?) request to ask for a track >>>> establishment could be seen as an event, or could be a new flow. >>>> At the call, I suggested that it could be a new, 5th flow. My arguments >>>> are that this flow: >>>> - Probably yields different data format. The demand carries and points, >>>> end to end latency and bandwidth. That's quite specific. >>>> - Probably yields a different flow. Events do not necessarily have a >>>> response. >>>> - Probably uses a different transport as well (PCEP vs. CoAP) >>>> >>>> What do you think? >>>> >>>> Pascal >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch >>>> >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >> >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > --047d7bd75160ccf69d04e59582a4 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
I would agree that a 5th flow makes sense, especially beca= use it allows us to use different transport mechanisms for the report flow = (CoAP?) and this new flows (CoAP now? maybe PCEP later?).

Do what do we call this new flow? "Schedule update request" is a = bit long.

Thomas


On Wed, Sep 4, 2013 at 2:12 PM, Qin= Wang <qinwang@berkeley.edu> wrote:
Hi Thomas,

Thanks for your explanation. You are saying the request packet from node= is generated by the upper layer of 6top, correct?=A0

If so, since the request packet is generated by upper l= ayer of 6top, instead of 6top internal events like alarm, I think it is rea= sonable to add the 5th control flow.

What do you think?

Qin


On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne <watteyne@eecs.b= erkeley.edu> wrote:
Qin,

Tha= nks for bringing that up. Allow me to answer in Pascal's place. We are = talking about the format of the packets exchanged between the ME and the no= des. In the centralized case, these are application-level packets, i.e. pac= ket generated by an entity a couple of layer above 6top. That entity talks = with the PCE over the network, and with 6top through the API (internal to t= he node) as defined in=A0http://tools.ietf.org/html/draf= t-wang-6tsch-6top-00#section-2.4.

If we agree on that, the question is whether the packet= the node sends to establish a new track is part of the event flow, or not.= In both cases, it would originate from this application-level entity, but = possibly transported in different ways.

Thomas

On Fri, Aug 30, 2013 at 11:01 AM, Qi= n Wang <qinwang@berkeley.edu> wrote:
Hi Pascal,

My understa= nding is that 6top is a passive role in dealing with cell/track reservation= . In another word, the 6top in a node can report its state, including neigh= bor table, cell usage, and other statistics information, but can not make d= ecision on if some cells/track should be added or removed, which should be = the responsibility of PCE in centralized case or upper layer in distributed= case. Thus, I can not see when the 5th flow will be used. Can you explain = more?

Thanks
Qin


On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthuber= t) <pthubert@cisco.com> wrote:
Dear all,

We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow.
At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow:
- Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific.
- Probably yields a different flow. Events do not necessarily have a respon= se.
- Probably uses a different transport as well (PCEP vs. CoAP)

What do you think?

Pascal
_______________________________________________
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h= ttps://www.ietf.org/mailman/listinfo/6tsch


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h= ttps://www.ietf.org/mailman/listinfo/6tsch

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--047d7bd75160ccf69d04e59582a4-- From qinwang@berkeley.edu Wed Sep 4 14:53:15 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2F72E21F9D3B for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 14:53:15 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.893 X-Spam-Level: X-Spam-Status: No, score=-2.893 tagged_above=-999 required=5 tests=[AWL=0.083, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KGsoZjeL6-KO for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 14:53:11 -0700 (PDT) Received: from mail-ve0-f176.google.com (mail-ve0-f176.google.com [209.85.128.176]) by ietfa.amsl.com (Postfix) with ESMTP id AA79C21F99FD for <6tsch@ietf.org>; Wed, 4 Sep 2013 14:53:10 -0700 (PDT) Received: by mail-ve0-f176.google.com with SMTP id b10so617089vea.35 for <6tsch@ietf.org>; Wed, 04 Sep 2013 14:53:10 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=rQ5NczL4aSEWzEwO/HFsW1EB0TfjcL6Wcndzdz3X1is=; b=TPX0CAJFweQFu8+hHkxQwMtk+DpyGm/2CbKG1+FJj4Iycea58deQHkqWsuI3RrRw1D dtVkMDSiW1t0B+xsAI8WrIeXL7AK2qUGUjQKb7RdOh5tgo3kNFqPHV2fbN3SVu1nWwep e6t9R+/aqmFOIQs1HH1Uvlg+1FNFTGDZa60MhACxcpWyBEiDiI9h5Ryw0lO7D2+bnrN3 nxlcGBUJmDAENRVO287ih46KL/E+tOUYqo1AHi1/Ayt3LttnIU14JGWHmXDiMsKBUIL/ VtlpvTteshrGfBn6uOIwk/k+KrFTSDWrPKWcck1V/xlrtgWYXzY+1O6VUQyAyNGgKRvX OrFg== X-Gm-Message-State: ALoCoQmjSVQe8V+dIOIdj94k5fcvPnIcIuGmTiCGsoROV29zTJGhiPBSErDQL5mgj07pEy45gAOV MIME-Version: 1.0 X-Received: by 10.52.118.41 with SMTP id kj9mr27357vdb.44.1378331589847; Wed, 04 Sep 2013 14:53:09 -0700 (PDT) Received: by 10.220.116.135 with HTTP; Wed, 4 Sep 2013 14:53:09 -0700 (PDT) In-Reply-To: References: Date: Thu, 5 Sep 2013 05:53:09 +0800 Message-ID: From: Qin Wang To: "Pascal Thubert (pthubert)" Content-Type: multipart/alternative; boundary=089e0122f0e4cbbc5d04e595d409 Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org>, "xvilajosana@eecs.berkeley.edu" Subject: Re: [6tsch] Confirmation Messages? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2013 21:53:15 -0000 --089e0122f0e4cbbc5d04e595d409 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Thomas and all, I want to make sure that you are not going to use Ack in transport layer to replace the "Success/Fail" in Action flow, which is in App layer. Correct? Usually, the meaning of status in App layer is different from that in transport layer. For example, A Ack in CoAP just means a packet is sent to the end node successfully. But the "Success" in App layer will mean the action required is executed successfully. Qin On Wed, Sep 4, 2013 at 9:59 PM, Pascal Thubert (pthubert) < pthubert@cisco.com> wrote: > I agree too.**** > > ** ** > > To be very clear:**** > > ** ** > > We=92ll note that sometimes the confirmation of a request is indirect, li= ke > a request may trigger a flow and observing the flow is a confirmation tha= t > the request was received. Or there must be an app layer answer and > observing that answer is a confirmation that the request went through. > ISA100.11a transactions that really need an ack obey this model, and TCP > level acks would just have been a waste of energy. That=92s a reason why = we > did not go for TCP but used UDP instead, using the app layer response as > implicit acks, and deferring to the app layer whether and how to manage > retries (based on RFC 2988).**** > > ** ** > > With 6TiSCH, we also expect to use UDP (below CoAP) as a transport, so > there is no real transport level ack =96like a TCP ack- that would waste > resources. For all I know we=92re probably well covered with the flows th= at > CoAP enables, whether we want an acknowledgement or not, or whether the > response is the acknowledgement that we are after.**** > > ** ** > > Cheers,**** > > ** ** > > Pascal**** > > ** ** > > *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On Behalf > Of *Xavier Vilajosana Guillen > *Sent:* mercredi 4 septembre 2013 05:56 > *To:* Thomas Watteyne > *Cc:* 6tsch@ietf.org > *Subject:* Re: [6tsch] Confirmation Messages?**** > > ** ** > > I completely agree with that. Having confirmations done by transport > protocols simplifies our work and we do not need to re-invent the wheel. = * > *** > > ** ** > > so +1 for that.**** > > X**** > > ** ** > > On Tue, Sep 3, 2013 at 7:08 PM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > One last thought: http://tools.ietf.org/html/draft-ietf-core-observe-09 m= ight > come in handy for the report flow for example.**** > > ** ** > > On Tue, Sep 3, 2013 at 6:59 PM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > Qin, all,**** > > ** ** > > *[I hope you enjoyed the long week-end (here in the US) as much as I did!= ] > ***** > > ** ** > > As Maria Rita pointed out during the call on Friday, let's try to make > absolutely sure we don't over-complicate things. I believe I agree with t= he > fact that different flows might have different requirements. Link-layer > ACKs can guarantee a level of reliability acceptable to some flows, but i= t > certainly would be better to have an end-to-end confirmation for others.*= * > ** > > ** ** > > My vote would go for using the underlying "transport" mechanism to provid= e > us with some confirmation capabilities. If we take the example of CoAP, w= e > could say that action and query flows MUST use confirmable messages, whil= e > report and event MAY. CoAP would also allow us to switch between > piggy-backing the response in the ACK for the query flow.**** > > ** ** > > The advantage is that we do not have to reinvent this "transport" > mechanism. The mechanism for triggering an ACK, timing out and > retransmitting, etc, is already done for us.**** > > ** ** > > Thoughts?**** > > ** ** > > Thomas**** > > ** ** > > On Fri, Aug 30, 2013 at 10:47 AM, Qin Wang wrote:*= * > ** > > Hi all,**** > > ** ** > > In this thread, we will continue the discussion about Confirmation > message. Here is some background information.**** > > ** ** > > Context: e.g.**** > > - node sends a report and want to know if the report is accepted., **= * > * > > - ME sends a action request and want to know if/when the action taken= . > **** > > Options:**** > > (1) Nothing**** > > (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** > > (3) App-level ACK type**** > > (4) Use different flow (i.e. action flow)**** > > ** ** > > IMHO, different control flow may have different requirement for > confirmation message.**** > > (1) Action Flow, needs a App-level confirmation, like Succ/Fail**** > > (2) Query Flow, automatically has the confirmation, i.e. the message > packet corresponding to a specific query.**** > > (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer > option (1) and (3), i.e. the confirmation message is an option, but if a > confirmation message is needed, it should be App-level Ack, instead of > transport layer confirmation, which will give 6top more flexibility.**** > > ** ** > > What do you think?**** > > ** ** > > Thanks**** > > Qin**** > > **** > > ** ** > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > > ** ** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --089e0122f0e4cbbc5d04e595d409 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hi Thomas and all,

I want to make sure = that you are not going to use Ack in transport layer to replace the "S= uccess/Fail" in Action flow, which is in App layer. Correct? Usually,= =A0the meaning of status in App layer is different from that in transport layer. F= or example, A Ack in CoAP just means a packet is sent to the end node successfully. But the "Success" in App layer will mean the action required is executed successfully.

Qin =A0
<= div class=3D"gmail_extra">

On Wed, Sep 4, 2013 at 9:59 PM, Pascal T= hubert (pthubert) <pthubert@cisco.com> wrote:

I agree too.

=A0<= /p>

To be very clear:<= u>

=A0<= /p>

We=92ll note that sometim= es the confirmation of a request is indirect, like a request may trigger a = flow and observing the flow is a confirmation that the request was received. Or there must be an app layer answer and observing that answ= er is a confirmation that the request went through. ISA100.11a transactions= that really need an ack obey this model, and TCP level acks would just hav= e been a waste of energy. That=92s a reason why we did not go for TCP but used UDP instead, using the app lay= er response as implicit acks, and deferring to the app layer whether and ho= w to manage retries (based on RFC 2988).

=A0<= /p>

With 6TiSCH, we also expe= ct to use UDP (below CoAP) as a transport, so there is no real transport le= vel ack =96like a TCP ack- that would waste resources. For all I know we=92re probably well covered with the flows that CoAP enables,= whether we want an acknowledgement or not, or whether the response is the = acknowledgement that we are after.

=A0<= /p>

Cheers,

=A0<= /p>

Pascal=

=A0<= /p>

From: 6tsch-bounces@ietf.org= [mailto:6t= sch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
Sent: mercredi 4 septembre 2013 05:56
To: Thomas Watteyne
Cc: 6tsch@ietf.o= rg
Subject: Re: [6tsch] Confirmation Messages?

=

=A0

I completely agree with that. Having confirmations d= one by transport protocols simplifies our work and we do not need to re-inv= ent the wheel.=A0

=A0

so +1 for that.

X

=A0

On Tue, Sep 3, 2013 at 7:08 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

One last thought:=A0http://tools.ietf.org/h= tml/draft-ietf-core-observe-09=A0might come in handy for the report flo= w for example.

=A0

On Tue, Sep 3, 2013 at 6:59 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

Qin, all,

=A0

[I hope you enjoyed the long week-end (here in th= e US) as much as I did!]

=A0

As Maria Rita pointed out during the call on Friday,= let's try to make absolutely sure we don't over-complicate things.= I believe I agree with the fact that different flows might have different = requirements. Link-layer ACKs can guarantee a level of reliability acceptable to some flows, but it certainly would be= better to have an end-to-end confirmation for others.

=A0

My vote would go for using the underlying "tran= sport" mechanism to provide us with some confirmation capabilities. If= we take the example of CoAP, we could say that action and query flows MUST= use confirmable messages, while report and event MAY. CoAP would also allow us to switch between piggy-backing the re= sponse in the ACK for the query flow.

=A0

The advantage is that we do not have to reinvent thi= s "transport" mechanism. The mechanism for triggering an ACK, tim= ing out and retransmitting, etc, is already done for us.

=A0

Thoughts?

=A0

Thomas

=A0

On Fri, Aug 30, 2013 at 10:47 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi all,

=A0

In this thread, we = will continue the discussion about Confirmation message. Here is some backg= round information.

=A0

Context: e.g.

=A0 =A0 - node send= s a report and want to know if the report is accepted.,=A0

=A0 =A0 - ME sends = a action request and want to know if/when the action taken.

Options:

=A0 =A0(1) Nothing<= /span>

=A0 =A0(2) Rely on = transport mechanism (e.g. confirmable CoAP message)

=A0 =A0(3) App-leve= l ACK type

=A0 =A0(4) Use diff= erent flow (i.e. action flow)

=A0

IMHO, different con= trol flow may have different requirement for confirmation message.

=A0 =A0 (1) Action = Flow, needs a App-level confirmation, like Succ/Fail

=A0 =A0 (2) Query F= low, automatically has the confirmation, i.e. the message packet correspond= ing to a specific query.

=A0 =A0 (3) Report = Flow and Event Flow, option (1)-(3) are OK, but I prefer option (1) and (3)= , i.e. the confirmation message is an option, but if a confirmation message= is needed, it should be App-level Ack, instead of transport layer confirmation, which will give 6top more flexibi= lity.

=A0

What do you think?<= /span>

=A0

Thanks

Qin

=A0 = =A0=A0

=A0

_____________________= __________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--089e0122f0e4cbbc5d04e595d409-- From twatteyne@gmail.com Wed Sep 4 14:59:43 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7170F21F9DB8 for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 14:59:43 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.885 X-Spam-Level: X-Spam-Status: No, score=-1.885 tagged_above=-999 required=5 tests=[AWL=0.092, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sTvaf9hPkGu5 for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 14:59:41 -0700 (PDT) Received: from mail-pd0-x234.google.com (mail-pd0-x234.google.com [IPv6:2607:f8b0:400e:c02::234]) by ietfa.amsl.com (Postfix) with ESMTP id DCC8D21F9E0B for <6tsch@ietf.org>; Wed, 4 Sep 2013 14:59:39 -0700 (PDT) Received: by mail-pd0-f180.google.com with SMTP id y10so903695pdj.11 for <6tsch@ietf.org>; Wed, 04 Sep 2013 14:59:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=egyFRh13dIfyVjC0j1rLcDSK9hjhTlRS9G9GbnHOVKA=; b=E2ZffTOHf0nf8MjPflWhLB0vbBthpOYRnISsvdF1W7YtIyiFPAUqvX5vAOlJs+B5OA ctbC0HTUv5Bo1BgR3eInpU/vOdO0xbu4eNE6Rz/3GTeU85I0rwM6l+UUYMAROSqTfr/X 7yxxCyxeM69Jck2Kx8B2pGwIglzpislaIJedPPed4vZ/f7nn8hWRIjkWFZFSK2Y/ewL5 6Xhq5iENmjEszjEcmX98Xvohz83DRV8T1dyr9xZD+3HSEF4XprbtpoERXkHdKj41iPB5 8GgBxi8x7/+zES1bC1LibL94KcsqvRTSOkYtQC51VrRmwEH94vRMXvBi+fxbzIHF+wkg m3Ug== X-Received: by 10.66.254.136 with SMTP id ai8mr5644713pad.86.1378331979447; Wed, 04 Sep 2013 14:59:39 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Wed, 4 Sep 2013 14:59:19 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Wed, 4 Sep 2013 14:59:19 -0700 X-Google-Sender-Auth: WIbgkL9EVIk3AWdOMy4NsjQbQFU Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b15fc2d04858604e595ece2 Subject: Re: [6tsch] Confirmation Messages? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2013 21:59:43 -0000 --047d7b15fc2d04858604e595ece2 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Qin, I understand the distinction you are making. CoAP allows us to piggyback a response. We still need to define what the answer is to a command in the action flow, but we don't have to define a whole new set of packet types. Does that work for you? Thomas On Wed, Sep 4, 2013 at 2:53 PM, Qin Wang wrote: > Hi Thomas and all, > > I want to make sure that you are not going to use Ack in transport layer > to replace the "Success/Fail" in Action flow, which is in App layer. > Correct? Usually, the meaning of status in App layer is different from > that in transport layer. For example, A Ack in CoAP just means a packet i= s > sent to the end node successfully. But the "Success" in App layer will me= an > the action required is executed successfully. > > Qin > > > On Wed, Sep 4, 2013 at 9:59 PM, Pascal Thubert (pthubert) < > pthubert@cisco.com> wrote: > >> I agree too.**** >> >> ** ** >> >> To be very clear:**** >> >> ** ** >> >> We=92ll note that sometimes the confirmation of a request is indirect, l= ike >> a request may trigger a flow and observing the flow is a confirmation th= at >> the request was received. Or there must be an app layer answer and >> observing that answer is a confirmation that the request went through. >> ISA100.11a transactions that really need an ack obey this model, and TCP >> level acks would just have been a waste of energy. That=92s a reason why= we >> did not go for TCP but used UDP instead, using the app layer response as >> implicit acks, and deferring to the app layer whether and how to manage >> retries (based on RFC 2988).**** >> >> ** ** >> >> With 6TiSCH, we also expect to use UDP (below CoAP) as a transport, so >> there is no real transport level ack =96like a TCP ack- that would waste >> resources. For all I know we=92re probably well covered with the flows t= hat >> CoAP enables, whether we want an acknowledgement or not, or whether the >> response is the acknowledgement that we are after.**** >> >> ** ** >> >> Cheers,**** >> >> ** ** >> >> Pascal**** >> >> ** ** >> >> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >> Behalf Of *Xavier Vilajosana Guillen >> *Sent:* mercredi 4 septembre 2013 05:56 >> *To:* Thomas Watteyne >> *Cc:* 6tsch@ietf.org >> *Subject:* Re: [6tsch] Confirmation Messages?**** >> >> ** ** >> >> I completely agree with that. Having confirmations done by transport >> protocols simplifies our work and we do not need to re-invent the wheel. >> **** >> >> ** ** >> >> so +1 for that.**** >> >> X**** >> >> ** ** >> >> On Tue, Sep 3, 2013 at 7:08 PM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote:**** >> >> One last thought: http://tools.ietf.org/html/draft-ietf-core-observe-09 = might >> come in handy for the report flow for example.**** >> >> ** ** >> >> On Tue, Sep 3, 2013 at 6:59 PM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote:**** >> >> Qin, all,**** >> >> ** ** >> >> *[I hope you enjoyed the long week-end (here in the US) as much as I >> did!]***** >> >> ** ** >> >> As Maria Rita pointed out during the call on Friday, let's try to make >> absolutely sure we don't over-complicate things. I believe I agree with = the >> fact that different flows might have different requirements. Link-layer >> ACKs can guarantee a level of reliability acceptable to some flows, but = it >> certainly would be better to have an end-to-end confirmation for others.= * >> *** >> >> ** ** >> >> My vote would go for using the underlying "transport" mechanism to >> provide us with some confirmation capabilities. If we take the example o= f >> CoAP, we could say that action and query flows MUST use confirmable >> messages, while report and event MAY. CoAP would also allow us to switch >> between piggy-backing the response in the ACK for the query flow.**** >> >> ** ** >> >> The advantage is that we do not have to reinvent this "transport" >> mechanism. The mechanism for triggering an ACK, timing out and >> retransmitting, etc, is already done for us.**** >> >> ** ** >> >> Thoughts?**** >> >> ** ** >> >> Thomas**** >> >> ** ** >> >> On Fri, Aug 30, 2013 at 10:47 AM, Qin Wang wrote:= * >> *** >> >> Hi all,**** >> >> ** ** >> >> In this thread, we will continue the discussion about Confirmation >> message. Here is some background information.**** >> >> ** ** >> >> Context: e.g.**** >> >> - node sends a report and want to know if the report is accepted., *= * >> ** >> >> - ME sends a action request and want to know if/when the action take= n. >> **** >> >> Options:**** >> >> (1) Nothing**** >> >> (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** >> >> (3) App-level ACK type**** >> >> (4) Use different flow (i.e. action flow)**** >> >> ** ** >> >> IMHO, different control flow may have different requirement for >> confirmation message.**** >> >> (1) Action Flow, needs a App-level confirmation, like Succ/Fail**** >> >> (2) Query Flow, automatically has the confirmation, i.e. the message >> packet corresponding to a specific query.**** >> >> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer >> option (1) and (3), i.e. the confirmation message is an option, but if a >> confirmation message is needed, it should be App-level Ack, instead of >> transport layer confirmation, which will give 6top more flexibility.**** >> >> ** ** >> >> What do you think?**** >> >> ** ** >> >> Thanks**** >> >> Qin**** >> >> **** >> >> ** ** >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> ** ** >> >> ** ** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> ** ** >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > --047d7b15fc2d04858604e595ece2 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Qin,
I understand the distinction you are making. CoAP= allows us to piggyback a response. We still need to define what the answer= is to a command in the action flow, but we don't have to define a whol= e new set of packet types.
Does that work for you?
Thomas


On Wed, Sep 4, 2013 at 2:53 PM,= Qin Wang <qinwang@berkeley.edu> wrote:
Hi Thomas and all,

=
I want to make sure that you are not going to use Ack in transpo= rt layer to replace the "Success/Fail" in Action flow, which is i= n App layer. Correct? Usually,=A0the meaning of status in App layer is different from that in transport layer. F= or example, A Ack in CoAP just means a packet is sent to the end node successfully. But the "Success" in App layer will mean the action required is executed successfully.

Qin =A0


On Wed, Sep 4, 2013 at 9:59 PM, Pascal T= hubert (pthubert) <pthubert@cisco.com> wrote:

I agree too.<= /p>

=A0<= /p>

To be very clear:<= u>

=A0<= /p>

We=92ll note that sometim= es the confirmation of a request is indirect, like a request may trigger a = flow and observing the flow is a confirmation that the request was received. Or there must be an app layer answer and observing that answ= er is a confirmation that the request went through. ISA100.11a transactions= that really need an ack obey this model, and TCP level acks would just hav= e been a waste of energy. That=92s a reason why we did not go for TCP but used UDP instead, using the app lay= er response as implicit acks, and deferring to the app layer whether and ho= w to manage retries (based on RFC 2988).

=A0<= /p>

With 6TiSCH, we also expe= ct to use UDP (below CoAP) as a transport, so there is no real transport le= vel ack =96like a TCP ack- that would waste resources. For all I know we=92re probably well covered with the flows that CoAP enables,= whether we want an acknowledgement or not, or whether the response is the = acknowledgement that we are after.

=A0<= /p>

Cheers,

=A0<= /p>

Pascal=

=A0<= /p>

From: 6tsch-bounces@ietf.org= [mailto:6t= sch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
Sent: mercredi 4 septembre 2013 05:56
To: Thomas Watteyne
Cc: 6tsch@ietf.o= rg
Subject: Re: [6tsch] Confirmation Messages?

=

=A0

I completely agree with that. Having confirmations d= one by transport protocols simplifies our work and we do not need to re-inv= ent the wheel.=A0

=A0

so +1 for that.

X

=A0

On Tue, Sep 3, 2013 at 7:08 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

One last thought:=A0http://tools.ietf.org/h= tml/draft-ietf-core-observe-09=A0might come in handy for the report flo= w for example.

=A0

On Tue, Sep 3, 2013 at 6:59 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

Qin, all,

=A0

[I hope you enjoyed the long week-end (here in th= e US) as much as I did!]

=A0

As Maria Rita pointed out during the call on Friday,= let's try to make absolutely sure we don't over-complicate things.= I believe I agree with the fact that different flows might have different = requirements. Link-layer ACKs can guarantee a level of reliability acceptable to some flows, but it certainly would be= better to have an end-to-end confirmation for others.

=A0

My vote would go for using the underlying "tran= sport" mechanism to provide us with some confirmation capabilities. If= we take the example of CoAP, we could say that action and query flows MUST= use confirmable messages, while report and event MAY. CoAP would also allow us to switch between piggy-backing the re= sponse in the ACK for the query flow.

=A0

The advantage is that we do not have to reinvent thi= s "transport" mechanism. The mechanism for triggering an ACK, tim= ing out and retransmitting, etc, is already done for us.

=A0

Thoughts?

=A0

Thomas

=A0

On Fri, Aug 30, 2013 at 10:47 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi all,

=A0

In this thread, we = will continue the discussion about Confirmation message. Here is some backg= round information.

=A0

Context: e.g.

=A0 =A0 - node send= s a report and want to know if the report is accepted.,=A0

=A0 =A0 - ME sends = a action request and want to know if/when the action taken.

Options:

=A0 =A0(1) Nothing<= /span>

=A0 =A0(2) Rely on = transport mechanism (e.g. confirmable CoAP message)

=A0 =A0(3) App-leve= l ACK type

=A0 =A0(4) Use diff= erent flow (i.e. action flow)

=A0

IMHO, different con= trol flow may have different requirement for confirmation message.

=A0 =A0 (1) Action = Flow, needs a App-level confirmation, like Succ/Fail

=A0 =A0 (2) Query F= low, automatically has the confirmation, i.e. the message packet correspond= ing to a specific query.

=A0 =A0 (3) Report = Flow and Event Flow, option (1)-(3) are OK, but I prefer option (1) and (3)= , i.e. the confirmation message is an option, but if a confirmation message= is needed, it should be App-level Ack, instead of transport layer confirmation, which will give 6top more flexibi= lity.

=A0

What do you think?<= /span>

=A0

Thanks

Qin

=A0 = =A0=A0

=A0

_____________________= __________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



--047d7b15fc2d04858604e595ece2-- From qinwang@berkeley.edu Wed Sep 4 15:10:11 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1F46121F9F9B for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 15:10:07 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.595 X-Spam-Level: X-Spam-Status: No, score=-2.595 tagged_above=-999 required=5 tests=[AWL=-0.219, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_34=0.6, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lNBfqgoDXbTn for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 15:10:02 -0700 (PDT) Received: from mail-vb0-f46.google.com (mail-vb0-f46.google.com [209.85.212.46]) by ietfa.amsl.com (Postfix) with ESMTP id 59EC321F9F99 for <6tsch@ietf.org>; Wed, 4 Sep 2013 15:10:01 -0700 (PDT) Received: by mail-vb0-f46.google.com with SMTP id p13so596083vbe.33 for <6tsch@ietf.org>; Wed, 04 Sep 2013 15:10:00 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=zL8xTaEYYCN8YVn75wzCO4El5LdljEnPc8SAvugTrAc=; b=gJcI0SKyiX4d3pg+8Qd8xsUMH2d1GUQm2+VvZeWysrKPg9De5mMvqhcLUO9I5SvaY3 gc9fHFoCtLCTmpkCSlReTyLBe3tj/FrScceS9whLIP8VJQwQX7j/978Uxg9f3gf4fXos dLXCalaBPAiKIzLkn2ZMJcx4dPVlbsQVYew+6xMui3TndEKXewwCM+mt/Xk08SnU2wy/ sp3lakVrGAQcTmHFrsGLxJjGM5XAyo4d+k6jJcWHA9YV6iiMUplb90Bpg3IUzUnA/1QN 2cO0cKk7MmpVZDvo52jTX/M6t7a0/Pzjie7tdFSqEmcB5/MqfDjCjLdrUdG0zCklaGtA ZNZA== X-Gm-Message-State: ALoCoQkoPcir+qsF2gQy3Qc2mIGiAADrHTVblwss5xGzmRH7ikO3dK9+3uTRDeqXjuKIMILQsLYN MIME-Version: 1.0 X-Received: by 10.58.198.13 with SMTP id iy13mr4580504vec.11.1378332600645; Wed, 04 Sep 2013 15:10:00 -0700 (PDT) Received: by 10.220.116.135 with HTTP; Wed, 4 Sep 2013 15:10:00 -0700 (PDT) In-Reply-To: References: Date: Thu, 5 Sep 2013 06:10:00 +0800 Message-ID: From: Qin Wang To: Thomas Watteyne Content-Type: multipart/alternative; boundary=047d7b6dcb7c0b483b04e59611d3 Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2013 22:10:11 -0000 --047d7b6dcb7c0b483b04e59611d3 Content-Type: text/plain; charset=ISO-8859-1 Thomas, I think "Flow" is a process to exchange messages for a given objective. For example, action flow consists of a Action Request from ME to 6top, and a Execution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update request" looks like one step of a process. I would like to suggest that the 5th flow is called "Schedule update flow", consists of a "Schedule update request" from node to PCE, and something like "Track/cell installation" from PCE to node. Make sense? Qin On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne wrote: > I would agree that a 5th flow makes sense, especially because it allows us > to use different transport mechanisms for the report flow (CoAP?) and this > new flows (CoAP now? maybe PCEP later?). > > Do what do we call this new flow? "Schedule update request" is a bit long. > > Thomas > > > On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang wrote: > >> Hi Thomas, >> >> Thanks for your explanation. You are saying the request packet from node >> is generated by the upper layer of 6top, correct? >> >> If so, since the request packet is generated by upper layer of 6top, >> instead of 6top internal events like alarm, I think it is reasonable to add >> the 5th control flow. >> >> What do you think? >> >> Qin >> >> >> On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote: >> >>> Qin, >>> >>> Thanks for bringing that up. Allow me to answer in Pascal's place. We >>> are talking about the format of the packets exchanged between the ME and >>> the nodes. In the centralized case, these are application-level packets, >>> i.e. packet generated by an entity a couple of layer above 6top. That >>> entity talks with the PCE over the network, and with 6top through the API >>> (internal to the node) as defined in >>> http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4. >>> >>> If we agree on that, the question is whether the packet the node sends >>> to establish a new track is part of the event flow, or not. In both cases, >>> it would originate from this application-level entity, but possibly >>> transported in different ways. >>> >>> Thomas >>> >>> On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang wrote: >>> >>>> Hi Pascal, >>>> >>>> My understanding is that 6top is a passive role in dealing with >>>> cell/track reservation. In another word, the 6top in a node can report its >>>> state, including neighbor table, cell usage, and other statistics >>>> information, but can not make decision on if some cells/track should be >>>> added or removed, which should be the responsibility of PCE in centralized >>>> case or upper layer in distributed case. Thus, I can not see when the 5th >>>> flow will be used. Can you explain more? >>>> >>>> Thanks >>>> Qin >>>> >>>> >>>> On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) < >>>> pthubert@cisco.com> wrote: >>>> >>>>> Dear all, >>>>> >>>>> We discussed at the call that the(PCEP?) request to ask for a track >>>>> establishment could be seen as an event, or could be a new flow. >>>>> At the call, I suggested that it could be a new, 5th flow. My >>>>> arguments are that this flow: >>>>> - Probably yields different data format. The demand carries and >>>>> points, end to end latency and bandwidth. That's quite specific. >>>>> - Probably yields a different flow. Events do not necessarily have a >>>>> response. >>>>> - Probably uses a different transport as well (PCEP vs. CoAP) >>>>> >>>>> What do you think? >>>>> >>>>> Pascal >>>>> _______________________________________________ >>>>> 6tsch mailing list >>>>> 6tsch@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>> >>>> >>>> >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >> > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --047d7b6dcb7c0b483b04e59611d3 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Thomas,

I think "Flow" is a p= rocess to exchange messages for a given objective. For example, action flow= consists of a Action Request from ME to 6top, and a Execution Confirm (Suc= c/Fail) from 6top to ME. But, "Schedule update request" looks lik= e one step of a process. I would like to suggest that the 5th flow is calle= d "Schedule update flow", consists of a "Schedule update req= uest" from node to PCE, and something like "Track/cell installati= on" from PCE to node.

Make sense?
Qin


On Thu, Sep 5, 2013 at 5:29 AM,= Thomas Watteyne <watteyne@eecs.berkeley.edu> wrote= :
I would agree that a 5th fl= ow makes sense, especially because it allows us to use different transport = mechanisms for the report flow (CoAP?) and this new flows (CoAP now? maybe = PCEP later?).

Do what do we call this new flow? "Schedule update request" is a = bit long.

Thomas


On Wed, Sep 4= , 2013 at 2:12 PM, Qin Wang <qinwang@berkeley.edu> wrote:=
Hi Thomas,

Thanks for your explanation. You are saying the request packet from node= is generated by the upper layer of 6top, correct?=A0

If so, since the request packet is generated by upper l= ayer of 6top, instead of 6top internal events like alarm, I think it is rea= sonable to add the 5th control flow.

What do you think?
<= div>
Qin


On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne <watteyne@eecs.b= erkeley.edu> wrote:
Qin,

Tha= nks for bringing that up. Allow me to answer in Pascal's place. We are = talking about the format of the packets exchanged between the ME and the no= des. In the centralized case, these are application-level packets, i.e. pac= ket generated by an entity a couple of layer above 6top. That entity talks = with the PCE over the network, and with 6top through the API (internal to t= he node) as defined in=A0http://tools.ietf.org/html/draf= t-wang-6tsch-6top-00#section-2.4.

If we agree on that, the question is whether the packet= the node sends to establish a new track is part of the event flow, or not.= In both cases, it would originate from this application-level entity, but = possibly transported in different ways.

Thomas

On Fri, Aug 30, 2013 at 11:01 AM, Qi= n Wang <qinwang@berkeley.edu> wrote:
Hi Pascal,

My understa= nding is that 6top is a passive role in dealing with cell/track reservation= . In another word, the 6top in a node can report its state, including neigh= bor table, cell usage, and other statistics information, but can not make d= ecision on if some cells/track should be added or removed, which should be = the responsibility of PCE in centralized case or upper layer in distributed= case. Thus, I can not see when the 5th flow will be used. Can you explain = more?

Thanks
Qin


On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthuber= t) <pthubert@cisco.com> wrote:
Dear all,

We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow.
At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow:
- Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific.
- Probably yields a different flow. Events do not necessarily have a respon= se.
- Probably uses a different transport as well (PCEP vs. CoAP)

What do you think?

Pascal
_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch




_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--047d7b6dcb7c0b483b04e59611d3-- From qinwang@berkeley.edu Wed Sep 4 15:11:57 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 449FD21F9FA2 for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 15:11:57 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.89 X-Spam-Level: X-Spam-Status: No, score=-2.89 tagged_above=-999 required=5 tests=[AWL=0.086, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id IYgsAExeK5HI for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 15:11:53 -0700 (PDT) Received: from mail-vc0-f182.google.com (mail-vc0-f182.google.com [209.85.220.182]) by ietfa.amsl.com (Postfix) with ESMTP id A38EC21F9F97 for <6tsch@ietf.org>; Wed, 4 Sep 2013 15:11:52 -0700 (PDT) Received: by mail-vc0-f182.google.com with SMTP id hf12so603543vcb.27 for <6tsch@ietf.org>; Wed, 04 Sep 2013 15:11:52 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=QfJdOFdGUMEFAsgOGrviRnqEk81lX5bQIfnhO7kQPGQ=; b=mGyABp4u1oDTYtepQibEay4vHqSWYDXJUlMTG0RMfGqLYBTZQByfOZ390x8kVX1hFP skxbA58PMk24tpFeAdcWfisNtuZrUtk0S6WBoWgrAyIWNDTa478pyaN4YSUzeEC70LZA fSzg19e283cgDoL4jDMf5g05uIELg7FaFhRFMo28wThu0Upn+vWj1ZQTCBNpnF6bKdKZ lZ6FgpJoMJV3odKavuwbXGeI5rjw3HCxO/bgxjrt/QeAAJikF29h5g8uszZMFvXaO2Cf 1U+gIKxtqgQEmZrrpBtLk70YtmKuLnOde/8TDkAK23+iHvmOZaguLl51LnGuUOrRGob3 HEsA== X-Gm-Message-State: ALoCoQnX0Fp8RGyeqXM5DGPY0E2OnUsoN9Q5zmAe12CspeUuPJrZKnSMwBuKetQwIARrJcDy+wRM MIME-Version: 1.0 X-Received: by 10.58.46.84 with SMTP id t20mr69057vem.56.1378332712086; Wed, 04 Sep 2013 15:11:52 -0700 (PDT) Received: by 10.220.116.135 with HTTP; Wed, 4 Sep 2013 15:11:52 -0700 (PDT) In-Reply-To: References: Date: Thu, 5 Sep 2013 06:11:52 +0800 Message-ID: From: Qin Wang To: Thomas Watteyne Content-Type: multipart/alternative; boundary=089e0115ffd2afb91b04e5961718 Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] Confirmation Messages? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2013 22:11:57 -0000 --089e0115ffd2afb91b04e5961718 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable I agree! Qin On Thu, Sep 5, 2013 at 5:59 AM, Thomas Watteyne wrote: > Qin, > I understand the distinction you are making. CoAP allows us to piggyback = a > response. We still need to define what the answer is to a command in the > action flow, but we don't have to define a whole new set of packet types. > Does that work for you? > Thomas > > > On Wed, Sep 4, 2013 at 2:53 PM, Qin Wang wrote: > >> Hi Thomas and all, >> >> I want to make sure that you are not going to use Ack in transport layer >> to replace the "Success/Fail" in Action flow, which is in App layer. >> Correct? Usually, the meaning of status in App layer is different from >> that in transport layer. For example, A Ack in CoAP just means a packet = is >> sent to the end node successfully. But the "Success" in App layer will m= ean >> the action required is executed successfully. >> >> Qin >> >> >> On Wed, Sep 4, 2013 at 9:59 PM, Pascal Thubert (pthubert) < >> pthubert@cisco.com> wrote: >> >>> I agree too.**** >>> >>> ** ** >>> >>> To be very clear:**** >>> >>> ** ** >>> >>> We=92ll note that sometimes the confirmation of a request is indirect, >>> like a request may trigger a flow and observing the flow is a confirmat= ion >>> that the request was received. Or there must be an app layer answer and >>> observing that answer is a confirmation that the request went through. >>> ISA100.11a transactions that really need an ack obey this model, and TC= P >>> level acks would just have been a waste of energy. That=92s a reason wh= y we >>> did not go for TCP but used UDP instead, using the app layer response a= s >>> implicit acks, and deferring to the app layer whether and how to manage >>> retries (based on RFC 2988).**** >>> >>> ** ** >>> >>> With 6TiSCH, we also expect to use UDP (below CoAP) as a transport, so >>> there is no real transport level ack =96like a TCP ack- that would wast= e >>> resources. For all I know we=92re probably well covered with the flows = that >>> CoAP enables, whether we want an acknowledgement or not, or whether the >>> response is the acknowledgement that we are after.**** >>> >>> ** ** >>> >>> Cheers,**** >>> >>> ** ** >>> >>> Pascal**** >>> >>> ** ** >>> >>> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >>> Behalf Of *Xavier Vilajosana Guillen >>> *Sent:* mercredi 4 septembre 2013 05:56 >>> *To:* Thomas Watteyne >>> *Cc:* 6tsch@ietf.org >>> *Subject:* Re: [6tsch] Confirmation Messages?**** >>> >>> ** ** >>> >>> I completely agree with that. Having confirmations done by transport >>> protocols simplifies our work and we do not need to re-invent the wheel= . >>> **** >>> >>> ** ** >>> >>> so +1 for that.**** >>> >>> X**** >>> >>> ** ** >>> >>> On Tue, Sep 3, 2013 at 7:08 PM, Thomas Watteyne < >>> watteyne@eecs.berkeley.edu> wrote:**** >>> >>> One last thought: http://tools.ietf.org/html/draft-ietf-core-observe-09= might >>> come in handy for the report flow for example.**** >>> >>> ** ** >>> >>> On Tue, Sep 3, 2013 at 6:59 PM, Thomas Watteyne < >>> watteyne@eecs.berkeley.edu> wrote:**** >>> >>> Qin, all,**** >>> >>> ** ** >>> >>> *[I hope you enjoyed the long week-end (here in the US) as much as I >>> did!]***** >>> >>> ** ** >>> >>> As Maria Rita pointed out during the call on Friday, let's try to make >>> absolutely sure we don't over-complicate things. I believe I agree with= the >>> fact that different flows might have different requirements. Link-layer >>> ACKs can guarantee a level of reliability acceptable to some flows, but= it >>> certainly would be better to have an end-to-end confirmation for others= . >>> **** >>> >>> ** ** >>> >>> My vote would go for using the underlying "transport" mechanism to >>> provide us with some confirmation capabilities. If we take the example = of >>> CoAP, we could say that action and query flows MUST use confirmable >>> messages, while report and event MAY. CoAP would also allow us to switc= h >>> between piggy-backing the response in the ACK for the query flow.**** >>> >>> ** ** >>> >>> The advantage is that we do not have to reinvent this "transport" >>> mechanism. The mechanism for triggering an ACK, timing out and >>> retransmitting, etc, is already done for us.**** >>> >>> ** ** >>> >>> Thoughts?**** >>> >>> ** ** >>> >>> Thomas**** >>> >>> ** ** >>> >>> On Fri, Aug 30, 2013 at 10:47 AM, Qin Wang wrote= : >>> **** >>> >>> Hi all,**** >>> >>> ** ** >>> >>> In this thread, we will continue the discussion about Confirmation >>> message. Here is some background information.**** >>> >>> ** ** >>> >>> Context: e.g.**** >>> >>> - node sends a report and want to know if the report is accepted., = * >>> *** >>> >>> - ME sends a action request and want to know if/when the action >>> taken.**** >>> >>> Options:**** >>> >>> (1) Nothing**** >>> >>> (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** >>> >>> (3) App-level ACK type**** >>> >>> (4) Use different flow (i.e. action flow)**** >>> >>> ** ** >>> >>> IMHO, different control flow may have different requirement for >>> confirmation message.**** >>> >>> (1) Action Flow, needs a App-level confirmation, like Succ/Fail**** >>> >>> (2) Query Flow, automatically has the confirmation, i.e. the messag= e >>> packet corresponding to a specific query.**** >>> >>> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer >>> option (1) and (3), i.e. the confirmation message is an option, but if = a >>> confirmation message is needed, it should be App-level Ack, instead of >>> transport layer confirmation, which will give 6top more flexibility.***= * >>> >>> ** ** >>> >>> What do you think?**** >>> >>> ** ** >>> >>> Thanks**** >>> >>> Qin**** >>> >>> **** >>> >>> ** ** >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch**** >>> >>> ** ** >>> >>> ** ** >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch**** >>> >>> ** ** >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >> > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --089e0115ffd2afb91b04e5961718 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
I agree!

Qin


On Thu, Sep 5, 2013 at 5:59 = AM, Thomas Watteyne <watteyne@eecs.berkeley.edu> wr= ote:
Qin,
I understand the d= istinction you are making. CoAP allows us to piggyback a response. We still= need to define what the answer is to a command in the action flow, but we = don't have to define a whole new set of packet types.
Does that work for you?
Thomas


On We= d, Sep 4, 2013 at 2:53 PM, Qin Wang <qinwang@berkeley.edu> wrote:
Hi Thomas and all,

=
I want to make sure that you are not going to use Ack in transpo= rt layer to replace the "Success/Fail" in Action flow, which is i= n App layer. Correct? Usually,=A0the meaning of status in App layer is different from that in transport layer. F= or example, A Ack in CoAP just means a packet is sent to the end node successfully. But the "Success" in App layer will mean the action required is executed successfully.
<= span style=3D"font-family:Arial,sans-serif;font-size:12pt">
Qin =A0


On Wed, Sep 4, 2013 at 9:59 PM, Pascal T= hubert (pthubert) <pthubert@cisco.com> wrote:

I agree too.

=A0<= /p>

To be very clear:<= u>

=A0<= /p>

We=92ll note that sometim= es the confirmation of a request is indirect, like a request may trigger a = flow and observing the flow is a confirmation that the request was received. Or there must be an app layer answer and observing that answ= er is a confirmation that the request went through. ISA100.11a transactions= that really need an ack obey this model, and TCP level acks would just hav= e been a waste of energy. That=92s a reason why we did not go for TCP but used UDP instead, using the app lay= er response as implicit acks, and deferring to the app layer whether and ho= w to manage retries (based on RFC 2988).

=A0<= /p>

With 6TiSCH, we also expe= ct to use UDP (below CoAP) as a transport, so there is no real transport le= vel ack =96like a TCP ack- that would waste resources. For all I know we=92re probably well covered with the flows that CoAP enables,= whether we want an acknowledgement or not, or whether the response is the = acknowledgement that we are after.

=A0<= /p>

Cheers,

=A0<= /p>

Pascal=

=A0<= /p>

From: 6tsch-bounces@ietf.org= [mailto:6t= sch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
Sent: mercredi 4 septembre 2013 05:56
To: Thomas Watteyne
Cc: 6tsch@ietf.o= rg
Subject: Re: [6tsch] Confirmation Messages?

=

=A0

I completely agree with that. Having confirmations d= one by transport protocols simplifies our work and we do not need to re-inv= ent the wheel.=A0

=A0

so +1 for that.

X

=A0

On Tue, Sep 3, 2013 at 7:08 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

One last thought:=A0http://tools.ietf.org/h= tml/draft-ietf-core-observe-09=A0might come in handy for the report flo= w for example.

=A0

On Tue, Sep 3, 2013 at 6:59 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

Qin, all,

=A0

[I hope you enjoyed the long week-end (here in th= e US) as much as I did!]

=A0

As Maria Rita pointed out during the call on Friday,= let's try to make absolutely sure we don't over-complicate things.= I believe I agree with the fact that different flows might have different = requirements. Link-layer ACKs can guarantee a level of reliability acceptable to some flows, but it certainly would be= better to have an end-to-end confirmation for others.

=A0

My vote would go for using the underlying "tran= sport" mechanism to provide us with some confirmation capabilities. If= we take the example of CoAP, we could say that action and query flows MUST= use confirmable messages, while report and event MAY. CoAP would also allow us to switch between piggy-backing the re= sponse in the ACK for the query flow.

=A0

The advantage is that we do not have to reinvent thi= s "transport" mechanism. The mechanism for triggering an ACK, tim= ing out and retransmitting, etc, is already done for us.

=A0

Thoughts?

=A0

Thomas

=A0

On Fri, Aug 30, 2013 at 10:47 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi all,

=A0

In this thread, we = will continue the discussion about Confirmation message. Here is some backg= round information.

=A0

Context: e.g.

=A0 =A0 - node send= s a report and want to know if the report is accepted.,=A0

=A0 =A0 - ME sends = a action request and want to know if/when the action taken.

Options:

=A0 =A0(1) Nothing<= /span>

=A0 =A0(2) Rely on = transport mechanism (e.g. confirmable CoAP message)

=A0 =A0(3) App-leve= l ACK type

=A0 =A0(4) Use diff= erent flow (i.e. action flow)

=A0

IMHO, different con= trol flow may have different requirement for confirmation message.

=A0 =A0 (1) Action = Flow, needs a App-level confirmation, like Succ/Fail

=A0 =A0 (2) Query F= low, automatically has the confirmation, i.e. the message packet correspond= ing to a specific query.

=A0 =A0 (3) Report = Flow and Event Flow, option (1)-(3) are OK, but I prefer option (1) and (3)= , i.e. the confirmation message is an option, but if a confirmation message= is needed, it should be App-level Ack, instead of transport layer confirmation, which will give 6top more flexibi= lity.

=A0

What do you think?<= /span>

=A0

Thanks

Qin

=A0 = =A0=A0

=A0

_____________________= __________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch




_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--089e0115ffd2afb91b04e5961718-- From pthubert@cisco.com Wed Sep 4 22:29:09 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DC4C321E80A5 for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 22:29:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.238 X-Spam-Level: X-Spam-Status: No, score=-10.238 tagged_above=-999 required=5 tests=[AWL=-0.240, BAYES_00=-2.599, HTML_MESSAGE=0.001, J_CHICKENPOX_34=0.6, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8mSB6a0OB-Yf for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 22:29:05 -0700 (PDT) Received: from rcdn-iport-4.cisco.com (rcdn-iport-4.cisco.com [173.37.86.75]) by ietfa.amsl.com (Postfix) with ESMTP id CF34621E80A1 for <6tsch@ietf.org>; Wed, 4 Sep 2013 22:29:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=13028; q=dns/txt; s=iport; t=1378358945; x=1379568545; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=gBT/0/9kfTsOmjfWvvRS/V0TIvwcEnzi7DXPfL88t+M=; b=QYG3chMsQWdQeQvL70VFWWlnobxYyNTG5MwPa9CjWcS6q713IHfM4ivv BZvDCn156H6AyAUVP2Sson6FyHDH/JnG7qYpP9FM/KoRGQ5R1bOKy2HC7 XXcIEncFuz3qpXzalva/o1SLE/BXXrBSf0Qmz8xvzgbp6wU5pYfS1pNqn U=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AogFAHkVKFKtJXG8/2dsb2JhbABbDoJ5NblWhzSBDYEuFnSCJQEBBAEBAWQHCxACAQg/BycLFBECBA4FiAIMujaPXAQHgx2BAAOIfY54gS+QN4JhPw X-IronPort-AV: E=Sophos;i="4.90,844,1371081600"; d="scan'208,217";a="255894928" Received: from rcdn-core2-1.cisco.com ([173.37.113.188]) by rcdn-iport-4.cisco.com with ESMTP; 05 Sep 2013 05:29:04 +0000 Received: from xhc-rcd-x08.cisco.com (xhc-rcd-x08.cisco.com [173.37.183.82]) by rcdn-core2-1.cisco.com (8.14.5/8.14.5) with ESMTP id r855T4WN003312 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 5 Sep 2013 05:29:04 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-rcd-x08.cisco.com ([173.37.183.82]) with mapi id 14.02.0318.004; Thu, 5 Sep 2013 00:29:03 -0500 From: "Pascal Thubert (pthubert)" To: Qin Wang Thread-Topic: [6tsch] About the special type of event to ask PCE to create a track Thread-Index: AQHOqbN6vNF3zWfNUUeZLJxljh9TZ5m2bDUAgAALNACAACbaNA== Date: Thu, 5 Sep 2013 05:29:03 +0000 Message-ID: <8250584A-471D-4AFB-B0EE-73C9EA3C9F41@cisco.com> References: , In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: multipart/alternative; boundary="_000_8250584A471D4AFBB0EE73C9EA3C9F41ciscocom_" MIME-Version: 1.0 Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 05:29:10 -0000 --_000_8250584A471D4AFBB0EE73C9EA3C9F41ciscocom_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable +1 Pascal Le 5 sept. 2013 =E0 00:10, "Qin Wang" > a =E9crit : Thomas, I think "Flow" is a process to exchange messages for a given objective. For= example, action flow consists of a Action Request from ME to 6top, and a E= xecution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update request= " looks like one step of a process. I would like to suggest that the 5th fl= ow is called "Schedule update flow", consists of a "Schedule update request= " from node to PCE, and something like "Track/cell installation" from PCE t= o node. Make sense? Qin On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne > wrote: I would agree that a 5th flow makes sense, especially because it allows us = to use different transport mechanisms for the report flow (CoAP?) and this = new flows (CoAP now? maybe PCEP later?). Do what do we call this new flow? "Schedule update request" is a bit long. Thomas On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang > wrote: Hi Thomas, Thanks for your explanation. You are saying the request packet from node is= generated by the upper layer of 6top, correct? If so, since the request packet is generated by upper layer of 6top, instea= d of 6top internal events like alarm, I think it is reasonable to add the 5= th control flow. What do you think? Qin On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne > wrote: Qin, Thanks for bringing that up. Allow me to answer in Pascal's place. We are t= alking about the format of the packets exchanged between the ME and the nod= es. In the centralized case, these are application-level packets, i.e. pack= et generated by an entity a couple of layer above 6top. That entity talks w= ith the PCE over the network, and with 6top through the API (internal to th= e node) as defined in http://tools.ietf.org/html/draft-wang-6tsch-6top-00#s= ection-2.4. If we agree on that, the question is whether the packet the node sends to e= stablish a new track is part of the event flow, or not. In both cases, it w= ould originate from this application-level entity, but possibly transported= in different ways. Thomas On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang > wrote: Hi Pascal, My understanding is that 6top is a passive role in dealing with cell/track = reservation. In another word, the 6top in a node can report its state, incl= uding neighbor table, cell usage, and other statistics information, but can= not make decision on if some cells/track should be added or removed, which= should be the responsibility of PCE in centralized case or upper layer in = distributed case. Thus, I can not see when the 5th flow will be used. Can y= ou explain more? Thanks Qin On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) > wrote: Dear all, We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow. At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow: - Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific. - Probably yields a different flow. Events do not necessarily have a respon= se. - Probably uses a different transport as well (PCEP vs. CoAP) What do you think? Pascal _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_8250584A471D4AFBB0EE73C9EA3C9F41ciscocom_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
+1

Pascal

Le 5 sept. 2013 =E0 00:10, "Qin Wang" <qinwang@berkeley.edu> a =E9crit :

Thomas,

I think "Flow" is a process to exchange messages for a given= objective. For example, action flow consists of a Action Request from ME t= o 6top, and a Execution Confirm (Succ/Fail) from 6top to ME. But, "Sch= edule update request" looks like one step of a process. I would like to suggest that the 5th flow is called "Schedul= e update flow", consists of a "Schedule update request" from= node to PCE, and something like "Track/cell installation" from P= CE to node.

Make sense?
Qin


On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne = <watteyn= e@eecs.berkeley.edu> wrote:
I would agree that a 5th flow makes sense, especially beca= use it allows us to use different transport mechanisms for the report flow = (CoAP?) and this new flows (CoAP now? maybe PCEP later?).

Do what do we call this new flow? "Schedule update request" = is a bit long.

Thomas


On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang <qinwang@berke= ley.edu> wrote:
Hi Thomas,

Thanks for your explanation. You are saying the request packet from no= de is generated by the upper layer of 6top, correct? 

If so, since the request packet is generated by upper layer of 6top, i= nstead of 6top internal events like alarm, I think it is reasonable to add = the 5th control flow.

What do you think?

Qin


On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne= <watteyn= e@eecs.berkeley.edu> wrote:
Qin,

Thanks for bringing that up. Allow me to answer in Pascal's place. We = are talking about the format of the packets exchanged between the ME and th= e nodes. In the centralized case, these are application-level packets, i.e.= packet generated by an entity a couple of layer above 6top. That entity talks with the PCE over the networ= k, and with 6top through the API (internal to the node) as defined in = http://tools.ietf.org/html/draft-wang-6tsch-6top-00#sect= ion-2.4.

If we agree on that, the question is whether the packet the node sends= to establish a new track is part of the event flow, or not. In both cases,= it would originate from this application-level entity, but possibly transp= orted in different ways.

Thomas

On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang <qinwang@berke= ley.edu> wrote:
Hi Pascal,

My understanding is that 6top is a passive role in dealing with cell/t= rack reservation. In another word, the 6top in a node can report its state,= including neighbor table, cell usage, and other statistics information, bu= t can not make decision on if some cells/track should be added or removed, which should be the responsibility= of PCE in centralized case or upper layer in distributed case. Thus, I can= not see when the 5th flow will be used. Can you explain more?

Thanks
Qin


On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert= (pthubert) <pthubert@cisco.com> wrote:
Dear all,

We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow.
At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow:
- Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific.
- Probably yields a different flow. Events do not necessarily have a respon= se.
- Probably uses a different transport as well (PCEP vs. CoAP)

What do you think?

Pascal
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h= ttps://www.ietf.org/mailman/listinfo/6tsch


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<= /a>

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h= ttps://www.ietf.org/mailman/listinfo/6tsch




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h= ttps://www.ietf.org/mailman/listinfo/6tsch


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--_000_8250584A471D4AFBB0EE73C9EA3C9F41ciscocom_-- From twatteyne@gmail.com Wed Sep 4 23:22:20 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 43FE221E8097 for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 23:22:20 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.587 X-Spam-Level: X-Spam-Status: No, score=-1.587 tagged_above=-999 required=5 tests=[AWL=-0.210, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_34=0.6, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fPAGreQ33hqI for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 23:22:19 -0700 (PDT) Received: from mail-pa0-x232.google.com (mail-pa0-x232.google.com [IPv6:2607:f8b0:400e:c03::232]) by ietfa.amsl.com (Postfix) with ESMTP id 5FDBF11E8166 for <6tsch@ietf.org>; Wed, 4 Sep 2013 23:22:19 -0700 (PDT) Received: by mail-pa0-f50.google.com with SMTP id fb10so1482442pad.37 for <6tsch@ietf.org>; Wed, 04 Sep 2013 23:22:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=z7or2cg5BwmFHv4+mncZlDdyFhAsf+Xv+IDzR3b/uGE=; b=Gf235y5WT7d+DXUCHhQCii9LbsRBpGUpxhDPh0wxrAMlx0d/HD9czTWDr5CRal5SLs GgVzc3XCFOWLOZ7az4bxQAAxHptAtM/PuE0Cmhq/mEUiYNRfLdovAF8h7al4YPYfuumy GsiEnXXUUmIlHN5mj0PTElmigFAOZbgpkV3M4KpWyL3oepvzJ7qli2awg9MKyZkw6jjV tedtLMD/kph1aV21teW7t2jvqNKsjruFRD3Ji8FJ9ouX2XpB5B230yUtGZFeYLbkxMpB F/bx88/Fvr3Kc4ylnLWaTYEULihg3fpYp/z3QUv7rn+thg+5OxXfYrUWCVxIBeXOdRth qHqw== X-Received: by 10.68.108.3 with SMTP id hg3mr7369460pbb.91.1378362139094; Wed, 04 Sep 2013 23:22:19 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Wed, 4 Sep 2013 23:21:58 -0700 (PDT) In-Reply-To: <8250584A-471D-4AFB-B0EE-73C9EA3C9F41@cisco.com> References: <8250584A-471D-4AFB-B0EE-73C9EA3C9F41@cisco.com> From: Thomas Watteyne Date: Wed, 4 Sep 2013 23:21:58 -0700 X-Google-Sender-Auth: pgxErqolGNLIYMvbDG8L-dfqz1Q Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b6d966eac337a04e59cf185 Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 06:22:20 -0000 --047d7b6d966eac337a04e59cf185 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Qin, When a node makes a request for a schedule update to the PCE, the PCE will have to update the schedule of all the nodes along the track. It might do so using the Action flow. The 5th flow might only be used to (1) request the update and (2) for the mote to request the status of its request and (3) for the ME to indicate the success/failure of the request. As such, I would not include "Track/cell installation" in the 5th flow, but rather in the Action flow. Thomas On Wed, Sep 4, 2013 at 10:29 PM, Pascal Thubert (pthubert) < pthubert@cisco.com> wrote: > +1 > > Pascal > > Le 5 sept. 2013 =E0 00:10, "Qin Wang" a =E9crit : > > Thomas, > > I think "Flow" is a process to exchange messages for a given objective. > For example, action flow consists of a Action Request from ME to 6top, an= d > a Execution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update > request" looks like one step of a process. I would like to suggest that t= he > 5th flow is called "Schedule update flow", consists of a "Schedule update > request" from node to PCE, and something like "Track/cell installation" > from PCE to node. > > Make sense? > Qin > > > On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote: > >> I would agree that a 5th flow makes sense, especially because it allows >> us to use different transport mechanisms for the report flow (CoAP?) and >> this new flows (CoAP now? maybe PCEP later?). >> >> Do what do we call this new flow? "Schedule update request" is a bit >> long. >> >> Thomas >> >> >> On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang wrote: >> >>> Hi Thomas, >>> >>> Thanks for your explanation. You are saying the request packet from >>> node is generated by the upper layer of 6top, correct? >>> >>> If so, since the request packet is generated by upper layer of 6top, >>> instead of 6top internal events like alarm, I think it is reasonable to= add >>> the 5th control flow. >>> >>> What do you think? >>> >>> Qin >>> >>> >>> On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne < >>> watteyne@eecs.berkeley.edu> wrote: >>> >>>> Qin, >>>> >>>> Thanks for bringing that up. Allow me to answer in Pascal's place. We >>>> are talking about the format of the packets exchanged between the ME a= nd >>>> the nodes. In the centralized case, these are application-level packet= s, >>>> i.e. packet generated by an entity a couple of layer above 6top. That >>>> entity talks with the PCE over the network, and with 6top through the = API >>>> (internal to the node) as defined in >>>> http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4. >>>> >>>> If we agree on that, the question is whether the packet the node >>>> sends to establish a new track is part of the event flow, or not. In b= oth >>>> cases, it would originate from this application-level entity, but poss= ibly >>>> transported in different ways. >>>> >>>> Thomas >>>> >>>> On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang wrote= : >>>> >>>>> Hi Pascal, >>>>> >>>>> My understanding is that 6top is a passive role in dealing with >>>>> cell/track reservation. In another word, the 6top in a node can repor= t its >>>>> state, including neighbor table, cell usage, and other statistics >>>>> information, but can not make decision on if some cells/track should = be >>>>> added or removed, which should be the responsibility of PCE in centra= lized >>>>> case or upper layer in distributed case. Thus, I can not see when the= 5th >>>>> flow will be used. Can you explain more? >>>>> >>>>> Thanks >>>>> Qin >>>>> >>>>> >>>>> On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) < >>>>> pthubert@cisco.com> wrote: >>>>> >>>>>> Dear all, >>>>>> >>>>>> We discussed at the call that the(PCEP?) request to ask for a track >>>>>> establishment could be seen as an event, or could be a new flow. >>>>>> At the call, I suggested that it could be a new, 5th flow. My >>>>>> arguments are that this flow: >>>>>> - Probably yields different data format. The demand carries and >>>>>> points, end to end latency and bandwidth. That's quite specific. >>>>>> - Probably yields a different flow. Events do not necessarily have a >>>>>> response. >>>>>> - Probably uses a different transport as well (PCEP vs. CoAP) >>>>>> >>>>>> What do you think? >>>>>> >>>>>> Pascal >>>>>> _______________________________________________ >>>>>> 6tsch mailing list >>>>>> 6tsch@ietf.org >>>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> 6tsch mailing list >>>>> 6tsch@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>> >>>> >>>> >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch >>>> >>>> >>> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --047d7b6d966eac337a04e59cf185 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Qin,

When a node makes a request = for a schedule update to the PCE, the PCE will have to update the schedule = of all the nodes along the track. It might do so using the Action flow. The= 5th flow might only be used to (1) request the update and (2) for the mote= to request the status of its request and (3) for the ME to indicate the su= ccess/failure of the request. As such, I would not include=A0"Track/cell installation= " in the 5th flow, but rather in the Action flow.

=
Thomas


On Wed, Sep 4, 2013 at 10:29 PM, Pascal Thubert (pthubert) <pthubert@cisc= o.com> wrote:
+1

Pascal

Le 5 sept. 2013 =E0 00:10, "Qin Wang" <qinwang@berkeley.edu> a =E9crit= =A0:

Thomas,

I think "Flow" is a process to exchange messages for a given= objective. For example, action flow consists of a Action Request from ME t= o 6top, and a Execution Confirm (Succ/Fail) from 6top to ME. But, "Sch= edule update request" looks like one step of a process. I would like to suggest that the 5th flow is called "Schedul= e update flow", consists of a "Schedule update request" from= node to PCE, and something like "Track/cell installation" from P= CE to node.

Make sense?
Qin


On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne = <watteyn= e@eecs.berkeley.edu> wrote:
I would agree that a 5th flow makes sense, especially beca= use it allows us to use different transport mechanisms for the report flow = (CoAP?) and this new flows (CoAP now? maybe PCEP later?).

Do what do we call this new flow? "Schedule update request" = is a bit long.

Thomas


On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang <qinwang@berke= ley.edu> wrote:
Hi Thomas,

Thanks for your explanation. You are saying the request packet from no= de is generated by the upper layer of 6top, correct?=A0

If so, since the request packet is generated by upper layer of 6top, i= nstead of 6top internal events like alarm, I think it is reasonable to add = the 5th control flow.

What do you think?

Qin


On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne= <watteyn= e@eecs.berkeley.edu> wrote:
Qin,

Thanks for bringing that up. Allow me to answer in Pascal's place.= We are talking about the format of the packets exchanged between the ME an= d the nodes. In the centralized case, these are application-level packets, = i.e. packet generated by an entity a couple of layer above 6top. That entity talks with the PCE over the networ= k, and with 6top through the API (internal to the node) as defined in=A0http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section= -2.4.

If we agree on that, the question is whether the packet the node sends= to establish a new track is part of the event flow, or not. In both cases,= it would originate from this application-level entity, but possibly transp= orted in different ways.

Thomas

On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang <qinwang@berke= ley.edu> wrote:
Hi Pascal,

My understanding is that 6top is a passive role in dealing with cell/t= rack reservation. In another word, the 6top in a node can report its state,= including neighbor table, cell usage, and other statistics information, bu= t can not make decision on if some cells/track should be added or removed, which should be the responsibility= of PCE in centralized case or upper layer in distributed case. Thus, I can= not see when the 5th flow will be used. Can you explain more?

Thanks
Qin


On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert= (pthubert) <pthubert@cisco.com> wrote:
Dear all,

We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow.
At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow:
- Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific.
- Probably yields a different flow. Events do not necessarily have a respon= se.
- Probably uses a different transport as well (PCEP vs. CoAP)

What do you think?

Pascal
_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch
<= /a>

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch




_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


_______________________________________________
6tsch mailing list
6tsch@ietf.org
https://www.ietf.org/mailman/listinfo/6tsch

--047d7b6d966eac337a04e59cf185-- From maria-rita.palattella@uni.lu Wed Sep 4 23:48:11 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 75CD511E80D2 for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 23:48:11 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.248 X-Spam-Level: X-Spam-Status: No, score=-6.248 tagged_above=-999 required=5 tests=[AWL=-0.250, BAYES_00=-2.599, HTML_MESSAGE=0.001, J_CHICKENPOX_34=0.6, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pUeIpkaQdfwn for <6tsch@ietfa.amsl.com>; Wed, 4 Sep 2013 23:48:07 -0700 (PDT) Received: from hercules.uni.lu (hercules.uni.lu [158.64.76.33]) by ietfa.amsl.com (Postfix) with ESMTP id 45C5B21F9AE2 for <6tsch@ietf.org>; Wed, 4 Sep 2013 23:48:02 -0700 (PDT) X-IronPort-AV: E=Sophos;i="4.90,845,1371074400"; d="scan'208,217";a="26298694" Received: from unknown (HELO REED.uni.lux) ([10.21.2.9]) by hercules.uni.lu with ESMTP; 05 Sep 2013 08:48:01 +0200 Received: from HOSHI.uni.lux ([fe80::499:a33:4e68:4af9]) by REED.uni.lux ([fe80::31bb:b7a3:7abb:813e%10]) with mapi id 14.03.0158.001; Thu, 5 Sep 2013 08:46:38 +0200 From: Maria Rita PALATTELLA To: "Pascal Thubert (pthubert)" , Qin Wang Thread-Topic: [6tsch] About the special type of event to ask PCE to create a track Thread-Index: AQHOqfjgNtSBNMRQ0kmcAdiPrFm79pm2srgA Date: Thu, 5 Sep 2013 06:46:38 +0000 Message-ID: References: , <8250584A-471D-4AFB-B0EE-73C9EA3C9F41@cisco.com> In-Reply-To: <8250584A-471D-4AFB-B0EE-73C9EA3C9F41@cisco.com> Accept-Language: en-US, en-GB Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.91.0.65] Content-Type: multipart/alternative; boundary="_000_F085911F642A6847987ADA23E611780D1859A63Bhoshiunilux_" MIME-Version: 1.0 Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 06:48:11 -0000 --_000_F085911F642A6847987ADA23E611780D1859A63Bhoshiunilux_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I agree too. If we want to cut the name shorter, maybe we can just call it = " Schedule Flow" (removing the update). In the end, we know that this flow will happen when a node asks the PCE to = update its schedule, and add/remove cells/tracks. What do you think? Maria Rita From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of P= ascal Thubert (pthubert) Sent: Thursday, September 05, 2013 7:29 AM To: Qin Wang Cc: Thomas Watteyne; 6tsch@ietf.org Subject: Re: [6tsch] About the special type of event to ask PCE to create a= track +1 Pascal Le 5 sept. 2013 =E0 00:10, "Qin Wang" > a =E9crit : Thomas, I think "Flow" is a process to exchange messages for a given objective. For= example, action flow consists of a Action Request from ME to 6top, and a E= xecution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update request= " looks like one step of a process. I would like to suggest that the 5th fl= ow is called "Schedule update flow", consists of a "Schedule update request= " from node to PCE, and something like "Track/cell installation" from PCE t= o node. Make sense? Qin On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne > wrote: I would agree that a 5th flow makes sense, especially because it allows us = to use different transport mechanisms for the report flow (CoAP?) and this = new flows (CoAP now? maybe PCEP later?). Do what do we call this new flow? "Schedule update request" is a bit long. Thomas On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang > wrote: Hi Thomas, Thanks for your explanation. You are saying the request packet from node is= generated by the upper layer of 6top, correct? If so, since the request packet is generated by upper layer of 6top, instea= d of 6top internal events like alarm, I think it is reasonable to add the 5= th control flow. What do you think? Qin On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne > wrote: Qin, Thanks for bringing that up. Allow me to answer in Pascal's place. We are t= alking about the format of the packets exchanged between the ME and the nod= es. In the centralized case, these are application-level packets, i.e. pack= et generated by an entity a couple of layer above 6top. That entity talks w= ith the PCE over the network, and with 6top through the API (internal to th= e node) as defined in http://tools.ietf.org/html/draft-wang-6tsch-6top-00#s= ection-2.4. If we agree on that, the question is whether the packet the node sends to e= stablish a new track is part of the event flow, or not. In both cases, it w= ould originate from this application-level entity, but possibly transported= in different ways. Thomas On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang > wrote: Hi Pascal, My understanding is that 6top is a passive role in dealing with cell/track = reservation. In another word, the 6top in a node can report its state, incl= uding neighbor table, cell usage, and other statistics information, but can= not make decision on if some cells/track should be added or removed, which= should be the responsibility of PCE in centralized case or upper layer in = distributed case. Thus, I can not see when the 5th flow will be used. Can y= ou explain more? Thanks Qin On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) > wrote: Dear all, We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow. At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow: - Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific. - Probably yields a different flow. Events do not necessarily have a respon= se. - Probably uses a different transport as well (PCEP vs. CoAP) What do you think? Pascal _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_F085911F642A6847987ADA23E611780D1859A63Bhoshiunilux_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I agree too. If we want t= o cut the name shorter, maybe we can just call it “ Schedule FlowR= 21; (removing the update).

In the end, we know that = this flow will happen when a node asks the PCE to update its schedule, and = add/remove cells/tracks. What do you think?

Maria Rita

 <= /p>

From: 6tsch-bo= unces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Pascal Thubert (pthubert)
Sent: Thursday, September 05, 2013 7:29 AM
To: Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.org
Subject: Re: [6tsch] About the special type of event to ask PCE to c= reate a track

 

+1

Pascal


Le 5 sept. 2013 =E0 00:10, "Qin Wang" <qinwang@berkeley.edu> a =E9crit :

Thomas,

 

I think "Flow" is a process to exchange me= ssages for a given objective. For example, action flow consists of a Action= Request from ME to 6top, and a Execution Confirm (Succ/Fail) from 6top to = ME. But, "Schedule update request" looks like one step of a process. I would like to suggest that the 5th flow is called= "Schedule update flow", consists of a "Schedule update requ= est" from node to PCE, and something like "Track/cell installatio= n" from PCE to node.

 

Make sense?

Qin

 

On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

I would agree that a 5th flow makes sense, especiall= y because it allows us to use different transport mechanisms for the report= flow (CoAP?) and this new flows (CoAP now? maybe PCEP later?).

 

Do what do we call this new flow? "Schedule upd= ate request" is a bit long.

 

Thomas

 

On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang <qinwang@berkeley.edu= > wrote:

Hi Thomas,

 

Thanks for your explanation. You are saying the requ= est packet from node is generated by the upper layer of 6top, correct? = ;

 

If so, since the request packet is generated by uppe= r layer of 6top, instead of 6top internal events like alarm, I think it is = reasonable to add the 5th control flow.

 

What do you think?

 

Qin<= /p>

 

On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

Qin,

 

Thanks for bringing that up. Allow me to answer in P= ascal's place. We are talking about the format of the packets exchanged bet= ween the ME and the nodes. In the centralized case, these are application-l= evel packets, i.e. packet generated by an entity a couple of layer above 6top. That entity talks with the PCE = over the network, and with 6top through the API (internal to the node) as d= efined in http://tools.ietf.org/html/draft-wang-6ts= ch-6top-00#section-2.4.

 

If we agree on that, the question is whether the pac= ket the node sends to establish a new track is part of the event flow, or n= ot. In both cases, it would originate from this application-level entity, b= ut possibly transported in different ways.

 

Thomas

 

On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi Pascal,

 

My understanding is that 6top is a passive role in d= ealing with cell/track reservation. In another word, the 6top in a node can= report its state, including neighbor table, cell usage, and other statisti= cs information, but can not make decision on if some cells/track should be added or removed, which should be the res= ponsibility of PCE in centralized case or upper layer in distributed case. = Thus, I can not see when the 5th flow will be used. Can you explain more?

 

Thanks

Qin<= /p>

 

On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pt= hubert) <pthuber= t@cisco.com> wrote:

Dear all,

We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow.
At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow:
- Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific.
- Probably yields a different flow. Events do not necessarily have a respon= se.
- Probably uses a different transport as well (PCEP vs. CoAP)

What do you think?

Pascal
_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 

 


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 

_______________________________________________
6tsch mailing list
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https://www.ietf.or= g/mailman/listinfo/6tsch

--_000_F085911F642A6847987ADA23E611780D1859A63Bhoshiunilux_-- From pthubert@cisco.com Thu Sep 5 00:02:10 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6359C11E8179 for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 00:02:10 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.216 X-Spam-Level: X-Spam-Status: No, score=-10.216 tagged_above=-999 required=5 tests=[AWL=-0.218, BAYES_00=-2.599, HTML_MESSAGE=0.001, J_CHICKENPOX_34=0.6, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2jbBrOkgGgtL for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 00:02:05 -0700 (PDT) Received: from rcdn-iport-2.cisco.com (rcdn-iport-2.cisco.com [173.37.86.73]) by ietfa.amsl.com (Postfix) with ESMTP id 1962D11E817A for <6tsch@ietf.org>; Thu, 5 Sep 2013 00:02:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=21752; q=dns/txt; s=iport; t=1378364525; x=1379574125; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=u4LsnFSdqqytMbCMGZ4GZOQkehVK6CcVuSTkVbRl7eA=; b=BAAegUsTT4lHG9m5dZch7qIdRtaYLA+aBalN6mwCHrzAJoA+Cb3kC9TM DZGx7SUM1ila5vK0ep2RsbbXNUQNZlyG+pDwgm/YKFfUMeUvDeFGYDO7R gUINZQiYifwNZ/DIDNxGEJmx49m+Jv8jrxuN5yIkJZ5ROwRxc165CZ2HR Y=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AukFAAcrKFKtJXG8/2dsb2JhbABbDoI1RDVRuQWHNIENgS0WdIIkAQEBBAEBASo6BwsQAgEIEQQBAQsdBycLFAkIAgQBDQUIh3oMuimPLy0EBgGDHYEAA4VLgzKQJ5A3gmE/gio X-IronPort-AV: E=Sophos;i="4.90,845,1371081600"; d="scan'208,217";a="255817133" Received: from rcdn-core2-1.cisco.com ([173.37.113.188]) by rcdn-iport-2.cisco.com with ESMTP; 05 Sep 2013 07:02:03 +0000 Received: from xhc-rcd-x12.cisco.com (xhc-rcd-x12.cisco.com [173.37.183.86]) by rcdn-core2-1.cisco.com (8.14.5/8.14.5) with ESMTP id r85722tt017616 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 5 Sep 2013 07:02:02 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-rcd-x12.cisco.com ([173.37.183.86]) with mapi id 14.02.0318.004; Thu, 5 Sep 2013 02:02:02 -0500 From: "Pascal Thubert (pthubert)" To: Maria Rita PALATTELLA , Qin Wang Thread-Topic: [6tsch] About the special type of event to ask PCE to create a track Thread-Index: AQHOqgXSBkNoMOK/GUu6w2oT/19WYQ== Date: Thu, 5 Sep 2013 07:02:01 +0000 Deferred-Delivery: Thu, 5 Sep 2013 07:02:00 +0000 Message-ID: References: , <8250584A-471D-4AFB-B0EE-73C9EA3C9F41@cisco.com> In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.61.84.215] Content-Type: multipart/alternative; boundary="_000_E045AECD98228444A58C61C200AE1BD841459CFBxmbrcdx01ciscoc_" MIME-Version: 1.0 Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 07:02:10 -0000 --_000_E045AECD98228444A58C61C200AE1BD841459CFBxmbrcdx01ciscoc_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Fine with me Maria Rita, But note that there is also a flow that fits the name "schedule flow" that = is stimulated by the Net mgt Entity in the admin console as opposed to the = mt entity in the device. Same thing, this creates a req to the PCE to install a track. Do we want to= merge those 2 flows? - I think so. Cheers, Pascal From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] Sent: jeudi 5 septembre 2013 08:47 To: Pascal Thubert (pthubert); Qin Wang Cc: Thomas Watteyne; 6tsch@ietf.org Subject: RE: [6tsch] About the special type of event to ask PCE to create a= track I agree too. If we want to cut the name shorter, maybe we can just call it = " Schedule Flow" (removing the update). In the end, we know that this flow will happen when a node asks the PCE to = update its schedule, and add/remove cells/tracks. What do you think? Maria Rita From: 6tsch-bounces@ietf.org [mailto:6tsch-b= ounces@ietf.org] On Behalf Of Pascal Thubert (pthubert) Sent: Thursday, September 05, 2013 7:29 AM To: Qin Wang Cc: Thomas Watteyne; 6tsch@ietf.org Subject: Re: [6tsch] About the special type of event to ask PCE to create a= track +1 Pascal Le 5 sept. 2013 =E0 00:10, "Qin Wang" > a =E9crit : Thomas, I think "Flow" is a process to exchange messages for a given objective. For= example, action flow consists of a Action Request from ME to 6top, and a E= xecution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update request= " looks like one step of a process. I would like to suggest that the 5th fl= ow is called "Schedule update flow", consists of a "Schedule update request= " from node to PCE, and something like "Track/cell installation" from PCE t= o node. Make sense? Qin On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne > wrote: I would agree that a 5th flow makes sense, especially because it allows us = to use different transport mechanisms for the report flow (CoAP?) and this = new flows (CoAP now? maybe PCEP later?). Do what do we call this new flow? "Schedule update request" is a bit long. Thomas On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang > wrote: Hi Thomas, Thanks for your explanation. You are saying the request packet from node is= generated by the upper layer of 6top, correct? If so, since the request packet is generated by upper layer of 6top, instea= d of 6top internal events like alarm, I think it is reasonable to add the 5= th control flow. What do you think? Qin On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne > wrote: Qin, Thanks for bringing that up. Allow me to answer in Pascal's place. We are t= alking about the format of the packets exchanged between the ME and the nod= es. In the centralized case, these are application-level packets, i.e. pack= et generated by an entity a couple of layer above 6top. That entity talks w= ith the PCE over the network, and with 6top through the API (internal to th= e node) as defined in http://tools.ietf.org/html/draft-wang-6tsch-6top-00#s= ection-2.4. If we agree on that, the question is whether the packet the node sends to e= stablish a new track is part of the event flow, or not. In both cases, it w= ould originate from this application-level entity, but possibly transported= in different ways. Thomas On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang > wrote: Hi Pascal, My understanding is that 6top is a passive role in dealing with cell/track = reservation. In another word, the 6top in a node can report its state, incl= uding neighbor table, cell usage, and other statistics information, but can= not make decision on if some cells/track should be added or removed, which= should be the responsibility of PCE in centralized case or upper layer in = distributed case. Thus, I can not see when the 5th flow will be used. Can y= ou explain more? Thanks Qin On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) > wrote: Dear all, We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow. At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow: - Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific. - Probably yields a different flow. Events do not necessarily have a respon= se. - Probably uses a different transport as well (PCEP vs. CoAP) What do you think? Pascal _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_E045AECD98228444A58C61C200AE1BD841459CFBxmbrcdx01ciscoc_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Fine with me Maria Rita,

 <= /p>

But note that there is al= so a flow that fits the name “schedule flow” that is stimulated= by the Net mgt Entity in the admin console as opposed to the mt entity in the device.

Same thing, this creates = a req to the PCE to install a track. Do we want to merge those 2 flows? = 211; I think so.

 <= /p>

Cheers,=

 <= /p>

Pascal

 <= /p>

From: Maria Ri= ta PALATTELLA [mailto:maria-rita.palattella@uni.lu]
Sent: jeudi 5 septembre 2013 08:47
To: Pascal Thubert (pthubert); Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.org
Subject: RE: [6tsch] About the special type of event to ask PCE to c= reate a track

 

I agree too. If we want t= o cut the name shorter, maybe we can just call it “ Schedule FlowR= 21; (removing the update).

In the end, we know that = this flow will happen when a node asks the PCE to update its schedule, and = add/remove cells/tracks. What do you think?

Maria Rita

 <= /p>

From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Pascal Thubert (pthubert)
Sent: Thursday, September 05, 2013 7:29 AM
To: Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.or= g
Subject: Re: [6tsch] About the special type of event to ask PCE to c= reate a track

 

+1

Pascal


Le 5 sept. 2013 =E0 00:10, "Qin Wang" <qinwang@berkeley.edu> a =E9crit :

Thomas,

 

I think "Flow" is a process to exchange me= ssages for a given objective. For example, action flow consists of a Action= Request from ME to 6top, and a Execution Confirm (Succ/Fail) from 6top to = ME. But, "Schedule update request" looks like one step of a process. I would like to suggest that the 5th flow is called= "Schedule update flow", consists of a "Schedule update requ= est" from node to PCE, and something like "Track/cell installatio= n" from PCE to node.

 

Make sense?

Qin

 

On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

I would agree that a 5th flow makes sense, especiall= y because it allows us to use different transport mechanisms for the report= flow (CoAP?) and this new flows (CoAP now? maybe PCEP later?).

 

Do what do we call this new flow? "Schedule upd= ate request" is a bit long.

 

Thomas

 

On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang <qinwang@berkeley.edu= > wrote:

Hi Thomas,

 

Thanks for your explanation. You are saying the requ= est packet from node is generated by the upper layer of 6top, correct? = ;

 

If so, since the request packet is generated by uppe= r layer of 6top, instead of 6top internal events like alarm, I think it is = reasonable to add the 5th control flow.

 

What do you think?

 

Qin<= /p>

 

On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

Qin,

 

Thanks for bringing that up. Allow me to answer in P= ascal's place. We are talking about the format of the packets exchanged bet= ween the ME and the nodes. In the centralized case, these are application-l= evel packets, i.e. packet generated by an entity a couple of layer above 6top. That entity talks with the PCE = over the network, and with 6top through the API (internal to the node) as d= efined in http://tools.ietf.org/html/draft-wang-6ts= ch-6top-00#section-2.4.

 

If we agree on that, the question is whether the pac= ket the node sends to establish a new track is part of the event flow, or n= ot. In both cases, it would originate from this application-level entity, b= ut possibly transported in different ways.

 

Thomas

 

On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi Pascal,

 

My understanding is that 6top is a passive role in d= ealing with cell/track reservation. In another word, the 6top in a node can= report its state, including neighbor table, cell usage, and other statisti= cs information, but can not make decision on if some cells/track should be added or removed, which should be the res= ponsibility of PCE in centralized case or upper layer in distributed case. = Thus, I can not see when the 5th flow will be used. Can you explain more?

 

Thanks

Qin<= /p>

 

On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pt= hubert) <pthuber= t@cisco.com> wrote:

Dear all,

We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow.
At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow:
- Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific.
- Probably yields a different flow. Events do not necessarily have a respon= se.
- Probably uses a different transport as well (PCEP vs. CoAP)

What do you think?

Pascal
_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 

 


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 

_______________________________________________
6tsch mailing list
6tsch@ietf.org
https://www.ietf.or= g/mailman/listinfo/6tsch

--_000_E045AECD98228444A58C61C200AE1BD841459CFBxmbrcdx01ciscoc_-- From maria-rita.palattella@uni.lu Thu Sep 5 00:16:26 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 971D121E8099 for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 00:16:26 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.212 X-Spam-Level: X-Spam-Status: No, score=-6.212 tagged_above=-999 required=5 tests=[AWL=-0.214, BAYES_00=-2.599, HTML_MESSAGE=0.001, J_CHICKENPOX_34=0.6, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5qSe207eACly for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 00:16:22 -0700 (PDT) Received: from hercules.uni.lu (hercules.uni.lu [158.64.76.33]) by ietfa.amsl.com (Postfix) with ESMTP id 8493321E8097 for <6tsch@ietf.org>; Thu, 5 Sep 2013 00:16:20 -0700 (PDT) X-IronPort-AV: E=Sophos;i="4.90,845,1371074400"; d="scan'208,217";a="26299470" Received: from unknown (HELO Archer.uni.lux) ([10.21.2.1]) by hercules.uni.lu with ESMTP; 05 Sep 2013 09:16:20 +0200 Received: from HOSHI.uni.lux ([fe80::499:a33:4e68:4af9]) by Archer.uni.lux ([fe80::1009:b1e7:2b72:f0b8%10]) with mapi id 14.03.0158.001; Thu, 5 Sep 2013 09:16:20 +0200 From: Maria Rita PALATTELLA To: "Pascal Thubert (pthubert)" , Qin Wang Thread-Topic: [6tsch] About the special type of event to ask PCE to create a track Thread-Index: AQHOqfjgNtSBNMRQ0kmcAdiPrFm79pm2srgA///jcoCAACTagA== Date: Thu, 5 Sep 2013 07:16:18 +0000 Message-ID: References: , <8250584A-471D-4AFB-B0EE-73C9EA3C9F41@cisco.com> In-Reply-To: Accept-Language: en-US, en-GB Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.91.0.65] Content-Type: multipart/alternative; boundary="_000_F085911F642A6847987ADA23E611780D1859A6C9hoshiunilux_" MIME-Version: 1.0 Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 07:16:26 -0000 --_000_F085911F642A6847987ADA23E611780D1859A6C9hoshiunilux_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable It makes sense for me. Even though they are generated by different entities= , they are both addressed to the PCE, and they have the same final aim. Maria Rita From: Pascal Thubert (pthubert) [mailto:pthubert@cisco.com] Sent: Thursday, September 05, 2013 9:02 AM To: Maria Rita PALATTELLA; Qin Wang Cc: Thomas Watteyne; 6tsch@ietf.org Subject: RE: [6tsch] About the special type of event to ask PCE to create a= track Fine with me Maria Rita, But note that there is also a flow that fits the name "schedule flow" that = is stimulated by the Net mgt Entity in the admin console as opposed to the = mt entity in the device. Same thing, this creates a req to the PCE to install a track. Do we want to= merge those 2 flows? - I think so. Cheers, Pascal From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] Sent: jeudi 5 septembre 2013 08:47 To: Pascal Thubert (pthubert); Qin Wang Cc: Thomas Watteyne; 6tsch@ietf.org Subject: RE: [6tsch] About the special type of event to ask PCE to create a= track I agree too. If we want to cut the name shorter, maybe we can just call it = " Schedule Flow" (removing the update). In the end, we know that this flow will happen when a node asks the PCE to = update its schedule, and add/remove cells/tracks. What do you think? Maria Rita From: 6tsch-bounces@ietf.org [mailto:6tsch-b= ounces@ietf.org] On Behalf Of Pascal Thubert (pthubert) Sent: Thursday, September 05, 2013 7:29 AM To: Qin Wang Cc: Thomas Watteyne; 6tsch@ietf.org Subject: Re: [6tsch] About the special type of event to ask PCE to create a= track +1 Pascal Le 5 sept. 2013 =E0 00:10, "Qin Wang" > a =E9crit : Thomas, I think "Flow" is a process to exchange messages for a given objective. For= example, action flow consists of a Action Request from ME to 6top, and a E= xecution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update request= " looks like one step of a process. I would like to suggest that the 5th fl= ow is called "Schedule update flow", consists of a "Schedule update request= " from node to PCE, and something like "Track/cell installation" from PCE t= o node. Make sense? Qin On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne > wrote: I would agree that a 5th flow makes sense, especially because it allows us = to use different transport mechanisms for the report flow (CoAP?) and this = new flows (CoAP now? maybe PCEP later?). Do what do we call this new flow? "Schedule update request" is a bit long. Thomas On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang > wrote: Hi Thomas, Thanks for your explanation. You are saying the request packet from node is= generated by the upper layer of 6top, correct? If so, since the request packet is generated by upper layer of 6top, instea= d of 6top internal events like alarm, I think it is reasonable to add the 5= th control flow. What do you think? Qin On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne > wrote: Qin, Thanks for bringing that up. Allow me to answer in Pascal's place. We are t= alking about the format of the packets exchanged between the ME and the nod= es. In the centralized case, these are application-level packets, i.e. pack= et generated by an entity a couple of layer above 6top. That entity talks w= ith the PCE over the network, and with 6top through the API (internal to th= e node) as defined in http://tools.ietf.org/html/draft-wang-6tsch-6top-00#s= ection-2.4. If we agree on that, the question is whether the packet the node sends to e= stablish a new track is part of the event flow, or not. In both cases, it w= ould originate from this application-level entity, but possibly transported= in different ways. Thomas On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang > wrote: Hi Pascal, My understanding is that 6top is a passive role in dealing with cell/track = reservation. In another word, the 6top in a node can report its state, incl= uding neighbor table, cell usage, and other statistics information, but can= not make decision on if some cells/track should be added or removed, which= should be the responsibility of PCE in centralized case or upper layer in = distributed case. Thus, I can not see when the 5th flow will be used. Can y= ou explain more? Thanks Qin On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) > wrote: Dear all, We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow. At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow: - Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific. - Probably yields a different flow. Events do not necessarily have a respon= se. - Probably uses a different transport as well (PCEP vs. CoAP) What do you think? Pascal _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_F085911F642A6847987ADA23E611780D1859A6C9hoshiunilux_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

It makes sense for me. Ev= en though they are generated by different entities, they are both addressed= to the PCE, and they have the same final aim.

Maria Rita

 <= /p>

From: Pascal T= hubert (pthubert) [mailto:pthubert@cisco.com]
Sent: Thursday, September 05, 2013 9:02 AM
To: Maria Rita PALATTELLA; Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.org
Subject: RE: [6tsch] About the special type of event to ask PCE to c= reate a track

 

Fine with me Maria Rita,

 <= /p>

But note that there is al= so a flow that fits the name “schedule flow” that is stimulated= by the Net mgt Entity in the admin console as opposed to the mt entity in the device.

Same thing, this creates = a req to the PCE to install a track. Do we want to merge those 2 flows? = 211; I think so.

 <= /p>

Cheers,=

 <= /p>

Pascal

 <= /p>

From: Maria Ri= ta PALATTELLA [mailto:maria= -rita.palattella@uni.lu]
Sent: jeudi 5 septembre 2013 08:47
To: Pascal Thubert (pthubert); Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.or= g
Subject: RE: [6tsch] About the special type of event to ask PCE to c= reate a track

 

I agree too. If we want t= o cut the name shorter, maybe we can just call it “ Schedule FlowR= 21; (removing the update).

In the end, we know that = this flow will happen when a node asks the PCE to update its schedule, and = add/remove cells/tracks. What do you think?

Maria Rita

 <= /p>

From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Pascal Thubert (pthubert)
Sent: Thursday, September 05, 2013 7:29 AM
To: Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.or= g
Subject: Re: [6tsch] About the special type of event to ask PCE to c= reate a track

 

+1

Pascal


Le 5 sept. 2013 =E0 00:10, "Qin Wang" <qinwang@berkeley.edu> a =E9crit :

Thomas,

 

I think "Flow" is a process to exchange me= ssages for a given objective. For example, action flow consists of a Action= Request from ME to 6top, and a Execution Confirm (Succ/Fail) from 6top to = ME. But, "Schedule update request" looks like one step of a process. I would like to suggest that the 5th flow is called= "Schedule update flow", consists of a "Schedule update requ= est" from node to PCE, and something like "Track/cell installatio= n" from PCE to node.

 

Make sense?

Qin

 

On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

I would agree that a 5th flow makes sense, especiall= y because it allows us to use different transport mechanisms for the report= flow (CoAP?) and this new flows (CoAP now? maybe PCEP later?).

 

Do what do we call this new flow? "Schedule upd= ate request" is a bit long.

 

Thomas

 

On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang <qinwang@berkeley.edu= > wrote:

Hi Thomas,

 

Thanks for your explanation. You are saying the requ= est packet from node is generated by the upper layer of 6top, correct? = ;

 

If so, since the request packet is generated by uppe= r layer of 6top, instead of 6top internal events like alarm, I think it is = reasonable to add the 5th control flow.

 

What do you think?

 

Qin<= /p>

 

On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

Qin,

 

Thanks for bringing that up. Allow me to answer in P= ascal's place. We are talking about the format of the packets exchanged bet= ween the ME and the nodes. In the centralized case, these are application-l= evel packets, i.e. packet generated by an entity a couple of layer above 6top. That entity talks with the PCE = over the network, and with 6top through the API (internal to the node) as d= efined in http://tools.ietf.org/html/draft-wang-6ts= ch-6top-00#section-2.4.

 

If we agree on that, the question is whether the pac= ket the node sends to establish a new track is part of the event flow, or n= ot. In both cases, it would originate from this application-level entity, b= ut possibly transported in different ways.

 

Thomas

 

On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi Pascal,

 

My understanding is that 6top is a passive role in d= ealing with cell/track reservation. In another word, the 6top in a node can= report its state, including neighbor table, cell usage, and other statisti= cs information, but can not make decision on if some cells/track should be added or removed, which should be the res= ponsibility of PCE in centralized case or upper layer in distributed case. = Thus, I can not see when the 5th flow will be used. Can you explain more?

 

Thanks

Qin<= /p>

 

On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pt= hubert) <pthuber= t@cisco.com> wrote:

Dear all,

We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow.
At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow:
- Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific.
- Probably yields a different flow. Events do not necessarily have a respon= se.
- Probably uses a different transport as well (PCEP vs. CoAP)

What do you think?

Pascal
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h= ttps://www.ietf.org/mailman/listinfo/6tsch

 


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h= ttps://www.ietf.org/mailman/listinfo/6tsch

 

 


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--_000_F085911F642A6847987ADA23E611780D1859A6C9hoshiunilux_-- From pthubert@cisco.com Thu Sep 5 00:25:25 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D73BD21E808D for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 00:25:24 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.223 X-Spam-Level: X-Spam-Status: No, score=-10.223 tagged_above=-999 required=5 tests=[AWL=-0.225, BAYES_00=-2.599, HTML_MESSAGE=0.001, J_CHICKENPOX_34=0.6, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XVX8fjzXw7U1 for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 00:25:19 -0700 (PDT) Received: from rcdn-iport-6.cisco.com (rcdn-iport-6.cisco.com [173.37.86.77]) by ietfa.amsl.com (Postfix) with ESMTP id 7083411E80C5 for <6tsch@ietf.org>; Thu, 5 Sep 2013 00:25:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=27526; q=dns/txt; s=iport; t=1378365919; x=1379575519; h=from:to:cc:subject:date:message-id:mime-version; bh=T844wygLe6w031U26dCsnCeUeOdRRaxKFkA/mRGQlXo=; b=Z6CfscvkdzpZFzOfD4i8wgoALryV+bt/RDnNp/+Myf6p6TC4tADfLyDR /RlC3H7DzCxMNTW7tnfCMPP/NVdQMJvvZ+88b/jPN9PThcQ3kKu31peVy RzbiWLwZwVlf25ABoZLF//BixU/RI6+dHLp+Iwi2W1LIEH9wpO+UQ3cp0 o=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AukFACkxKFKtJXG9/2dsb2JhbABbDoI1RDVRuQWHNIENgSYWdIIkAQEBBAEBASo6BwsSAQgRBAEBCxYHLgsUCQkBBAENBQiHegy6K48vLQQGgx6BAAOFS4MykCeQN4JhP4Iq X-IronPort-AV: E=Sophos;i="4.90,845,1371081600"; d="scan'208,217";a="255873011" Received: from rcdn-core2-2.cisco.com ([173.37.113.189]) by rcdn-iport-6.cisco.com with ESMTP; 05 Sep 2013 07:25:18 +0000 Received: from xhc-aln-x09.cisco.com (xhc-aln-x09.cisco.com [173.36.12.83]) by rcdn-core2-2.cisco.com (8.14.5/8.14.5) with ESMTP id r857PH1O026610 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 5 Sep 2013 07:25:17 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-aln-x09.cisco.com ([173.36.12.83]) with mapi id 14.02.0318.004; Thu, 5 Sep 2013 02:25:17 -0500 From: "Pascal Thubert (pthubert)" To: Maria Rita PALATTELLA , Qin Wang , "JP Vasseur (jvasseur)" Thread-Topic: [6tsch] About the special type of event to ask PCE to create a track Thread-Index: Ac6qCPYBexApk2NPS8iMgkcHuKbieA== Date: Thu, 5 Sep 2013 07:25:16 +0000 Deferred-Delivery: Thu, 5 Sep 2013 07:25:00 +0000 Message-ID: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.61.84.215] Content-Type: multipart/alternative; boundary="_000_E045AECD98228444A58C61C200AE1BD84145A186xmbrcdx01ciscoc_" MIME-Version: 1.0 Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 07:25:25 -0000 --_000_E045AECD98228444A58C61C200AE1BD84145A186xmbrcdx01ciscoc_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Yes... And the aim should be to make sure that the PCE has queued the request to b= uild a track. That request may be served asynchronously, considering that the PCE sometim= es needs to defragment / reoptimize multiple flows, and it may stack some r= equests for a short while. When the PCE is finally ready, it computes the track, and pushes it through= an action flow; but I would consider that a different flow, not an embedde= d flow for the reason above. Makes sense? Pascal From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] Sent: jeudi 5 septembre 2013 09:16 To: Pascal Thubert (pthubert); Qin Wang Cc: Thomas Watteyne; 6tsch@ietf.org Subject: RE: [6tsch] About the special type of event to ask PCE to create a= track It makes sense for me. Even though they are generated by different entities= , they are both addressed to the PCE, and they have the same final aim. Maria Rita From: Pascal Thubert (pthubert) [mailto:pthubert@cisco.com] Sent: Thursday, September 05, 2013 9:02 AM To: Maria Rita PALATTELLA; Qin Wang Cc: Thomas Watteyne; 6tsch@ietf.org Subject: RE: [6tsch] About the special type of event to ask PCE to create a= track Fine with me Maria Rita, But note that there is also a flow that fits the name "schedule flow" that = is stimulated by the Net mgt Entity in the admin console as opposed to the = mt entity in the device. Same thing, this creates a req to the PCE to install a track. Do we want to= merge those 2 flows? - I think so. Cheers, Pascal From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] Sent: jeudi 5 septembre 2013 08:47 To: Pascal Thubert (pthubert); Qin Wang Cc: Thomas Watteyne; 6tsch@ietf.org Subject: RE: [6tsch] About the special type of event to ask PCE to create a= track I agree too. If we want to cut the name shorter, maybe we can just call it = " Schedule Flow" (removing the update). In the end, we know that this flow will happen when a node asks the PCE to = update its schedule, and add/remove cells/tracks. What do you think? Maria Rita From: 6tsch-bounces@ietf.org [mailto:6tsch-b= ounces@ietf.org] On Behalf Of Pascal Thubert (pthubert) Sent: Thursday, September 05, 2013 7:29 AM To: Qin Wang Cc: Thomas Watteyne; 6tsch@ietf.org Subject: Re: [6tsch] About the special type of event to ask PCE to create a= track +1 Pascal Le 5 sept. 2013 =E0 00:10, "Qin Wang" > a =E9crit : Thomas, I think "Flow" is a process to exchange messages for a given objective. For= example, action flow consists of a Action Request from ME to 6top, and a E= xecution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update request= " looks like one step of a process. I would like to suggest that the 5th fl= ow is called "Schedule update flow", consists of a "Schedule update request= " from node to PCE, and something like "Track/cell installation" from PCE t= o node. Make sense? Qin On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne > wrote: I would agree that a 5th flow makes sense, especially because it allows us = to use different transport mechanisms for the report flow (CoAP?) and this = new flows (CoAP now? maybe PCEP later?). Do what do we call this new flow? "Schedule update request" is a bit long. Thomas On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang > wrote: Hi Thomas, Thanks for your explanation. You are saying the request packet from node is= generated by the upper layer of 6top, correct? If so, since the request packet is generated by upper layer of 6top, instea= d of 6top internal events like alarm, I think it is reasonable to add the 5= th control flow. What do you think? Qin On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne > wrote: Qin, Thanks for bringing that up. Allow me to answer in Pascal's place. We are t= alking about the format of the packets exchanged between the ME and the nod= es. In the centralized case, these are application-level packets, i.e. pack= et generated by an entity a couple of layer above 6top. That entity talks w= ith the PCE over the network, and with 6top through the API (internal to th= e node) as defined in http://tools.ietf.org/html/draft-wang-6tsch-6top-00#s= ection-2.4. If we agree on that, the question is whether the packet the node sends to e= stablish a new track is part of the event flow, or not. In both cases, it w= ould originate from this application-level entity, but possibly transported= in different ways. Thomas On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang > wrote: Hi Pascal, My understanding is that 6top is a passive role in dealing with cell/track = reservation. In another word, the 6top in a node can report its state, incl= uding neighbor table, cell usage, and other statistics information, but can= not make decision on if some cells/track should be added or removed, which= should be the responsibility of PCE in centralized case or upper layer in = distributed case. Thus, I can not see when the 5th flow will be used. Can y= ou explain more? Thanks Qin On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) > wrote: Dear all, We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow. At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow: - Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific. - Probably yields a different flow. Events do not necessarily have a respon= se. - Probably uses a different transport as well (PCEP vs. CoAP) What do you think? Pascal _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_E045AECD98228444A58C61C200AE1BD84145A186xmbrcdx01ciscoc_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Yes…

 <= /p>

And the aim should be to = make sure that the PCE has queued the request to build a track.<= /span>

That request may be serve= d asynchronously, considering that the PCE sometimes needs to defragment / = reoptimize multiple flows, and it may stack some requests for a short while.

When the PCE is finally r= eady, it computes the track, and pushes it through an action flow; but I wo= uld consider that a different flow, not an embedded flow for the reason above.

 <= /p>

Makes sense?

 <= /p>

Pascal

 <= /p>

From: Maria Ri= ta PALATTELLA [mailto:maria-rita.palattella@uni.lu]
Sent: jeudi 5 septembre 2013 09:16
To: Pascal Thubert (pthubert); Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.org
Subject: RE: [6tsch] About the special type of event to ask PCE to c= reate a track

 

It makes sense for me. Ev= en though they are generated by different entities, they are both addressed= to the PCE, and they have the same final aim.

Maria Rita

 <= /p>

From: Pascal T= hubert (pthubert) [mailto:pthubert@ci= sco.com]
Sent: Thursday, September 05, 2013 9:02 AM
To: Maria Rita PALATTELLA; Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.or= g
Subject: RE: [6tsch] About the special type of event to ask PCE to c= reate a track

 

Fine with me Maria Rita,<= /span>

 <= /p>

But note that there is al= so a flow that fits the name “schedule flow” that is stimulated= by the Net mgt Entity in the admin console as opposed to the mt entity in the device.

Same thing, this creates = a req to the PCE to install a track. Do we want to merge those 2 flows? = 211; I think so.

 <= /p>

Cheers,=

 <= /p>

Pascal=

 <= /p>

From: Maria Ri= ta PALATTELLA [mailto:maria= -rita.palattella@uni.lu]
Sent: jeudi 5 septembre 2013 08:47
To: Pascal Thubert (pthubert); Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.or= g
Subject: RE: [6tsch] About the special type of event to ask PCE to c= reate a track

 

I agree too. If we want t= o cut the name shorter, maybe we can just call it “ Schedule FlowR= 21; (removing the update).

In the end, we know that = this flow will happen when a node asks the PCE to update its schedule, and = add/remove cells/tracks. What do you think?

Maria Rita

 <= /p>

From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Pascal Thubert (pthubert)
Sent: Thursday, September 05, 2013 7:29 AM
To: Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.or= g
Subject: Re: [6tsch] About the special type of event to ask PCE to c= reate a track

 

+1

Pascal


Le 5 sept. 2013 =E0 00:10, "Qin Wang" <qinwang@berkeley.edu> a =E9crit :

Thomas,

 

I think "Flow" is a process to exchange me= ssages for a given objective. For example, action flow consists of a Action= Request from ME to 6top, and a Execution Confirm (Succ/Fail) from 6top to = ME. But, "Schedule update request" looks like one step of a process. I would like to suggest that the 5th flow is called= "Schedule update flow", consists of a "Schedule update requ= est" from node to PCE, and something like "Track/cell installatio= n" from PCE to node.

 

Make sense?

Qin

 

On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

I would agree that a 5th flow makes sense, especiall= y because it allows us to use different transport mechanisms for the report= flow (CoAP?) and this new flows (CoAP now? maybe PCEP later?).

 

Do what do we call this new flow? "Schedule upd= ate request" is a bit long.

 

Thomas

 

On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang <qinwang@berkeley.edu= > wrote:

Hi Thomas,

 

Thanks for your explanation. You are saying the requ= est packet from node is generated by the upper layer of 6top, correct? = ;

 

If so, since the request packet is generated by uppe= r layer of 6top, instead of 6top internal events like alarm, I think it is = reasonable to add the 5th control flow.

 

What do you think?

 

Qin<= /p>

 

On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

Qin,

 

Thanks for bringing that up. Allow me to answer in P= ascal's place. We are talking about the format of the packets exchanged bet= ween the ME and the nodes. In the centralized case, these are application-l= evel packets, i.e. packet generated by an entity a couple of layer above 6top. That entity talks with the PCE = over the network, and with 6top through the API (internal to the node) as d= efined in http://tools.ietf.org/html/draft-wang-6ts= ch-6top-00#section-2.4.

 

If we agree on that, the question is whether the pac= ket the node sends to establish a new track is part of the event flow, or n= ot. In both cases, it would originate from this application-level entity, b= ut possibly transported in different ways.

 

Thomas

 

On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi Pascal,

 

My understanding is that 6top is a passive role in d= ealing with cell/track reservation. In another word, the 6top in a node can= report its state, including neighbor table, cell usage, and other statisti= cs information, but can not make decision on if some cells/track should be added or removed, which should be the res= ponsibility of PCE in centralized case or upper layer in distributed case. = Thus, I can not see when the 5th flow will be used. Can you explain more?

 

Thanks

Qin<= /p>

 

On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pt= hubert) <pthuber= t@cisco.com> wrote:

Dear all,

We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow.
At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow:
- Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific.
- Probably yields a different flow. Events do not necessarily have a respon= se.
- Probably uses a different transport as well (PCEP vs. CoAP)

What do you think?

Pascal
_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 

 


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 

_______________________________________________
6tsch mailing list
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--_000_E045AECD98228444A58C61C200AE1BD84145A186xmbrcdx01ciscoc_-- From diego.dujovne@mail.udp.cl Thu Sep 5 05:40:23 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5691521E80BC for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 05:40:23 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.527 X-Spam-Level: X-Spam-Status: No, score=-2.527 tagged_above=-999 required=5 tests=[AWL=-0.150, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, J_CHICKENPOX_34=0.6, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PQjCEqmo177S for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 05:40:19 -0700 (PDT) Received: from mail-wi0-f171.google.com (mail-wi0-f171.google.com [209.85.212.171]) by ietfa.amsl.com (Postfix) with ESMTP id 0C92721E80B0 for <6tsch@ietf.org>; Thu, 5 Sep 2013 05:40:18 -0700 (PDT) Received: by mail-wi0-f171.google.com with SMTP id hm2so3646440wib.4 for <6tsch@ietf.org>; Thu, 05 Sep 2013 05:40:17 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=PXfTFG5W4TZOHGBaeWYdHad3Lh4VBiA8i4w5tCGDhjQ=; b=N49xOIbbTvAccaWrvYs9q9p3vwqcLBHEsdhAoJR74522+5kEFkTsvtBrIXzogqGik1 Egsb8CHZyMu5vEUIMDJVMZk8OTtktgVk0SGcTALNs7XjvOMJziH8K4A4rrasUGKvNvYU RcWEpi0oDGgZWt2PL7YW2KScEjEasKfucfPaVpimH3M+GxhNxQyvXnvGO7PkVAZxFI6B u+5qqAlc9J0Q1fqphLIESM4WJ6a88APy5BhbJYU1gNu97S4XOYQ5Nl+ASGPzdj5LyEpB 7ztPARNBT/gWx9DGHvbH1ZbhW1RbH0mDRs+JZbjJ6FSM7+QPfI++kfhabu0BRvHhedlr LSmA== X-Gm-Message-State: ALoCoQklfpnvHwW+jyO9GxgmMkHOLuEbQ9Oi8dLjQ1DYeww5F1UwdB1XFHUm+EeRA35xQwIpQMvG MIME-Version: 1.0 X-Received: by 10.180.106.135 with SMTP id gu7mr6174498wib.50.1378384817835; Thu, 05 Sep 2013 05:40:17 -0700 (PDT) Received: by 10.194.122.103 with HTTP; Thu, 5 Sep 2013 05:40:17 -0700 (PDT) In-Reply-To: References: Date: Thu, 5 Sep 2013 08:40:17 -0400 Message-ID: From: "Prof. Diego Dujovne" To: "Pascal Thubert (pthubert)" Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Cc: Maria Rita PALATTELLA , Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org>, Qin Wang , "JP Vasseur \(jvasseur\)" Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 12:40:23 -0000 Dear All, Then, we have two flows to update the track: Schedule flow (6top to ME): An action flow to ask for a new cell/track - Execution Confirm (Success/Failure) if requested This means that the request was queued. Action flow (ME to 6top): An action flow to announce the update of the schedule - Execution Confirm (Success/Failure) What happens if the queued request cannot be satisfied (e.g. energy policy restriction)? Comments? Diego Dujovne 2013/9/5 Pascal Thubert (pthubert) : > Yes=85 > > > > And the aim should be to make sure that the PCE has queued the request to > build a track. > > That request may be served asynchronously, considering that the PCE > sometimes needs to defragment / reoptimize multiple flows, and it may sta= ck > some requests for a short while. > > When the PCE is finally ready, it computes the track, and pushes it throu= gh > an action flow; but I would consider that a different flow, not an embedd= ed > flow for the reason above. > > > > Makes sense? > > > > Pascal > > > > From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] > Sent: jeudi 5 septembre 2013 09:16 > > > To: Pascal Thubert (pthubert); Qin Wang > Cc: Thomas Watteyne; 6tsch@ietf.org > Subject: RE: [6tsch] About the special type of event to ask PCE to create= a > track > > > > It makes sense for me. Even though they are generated by different entiti= es, > they are both addressed to the PCE, and they have the same final aim. > > Maria Rita > > > > From: Pascal Thubert (pthubert) [mailto:pthubert@cisco.com] > Sent: Thursday, September 05, 2013 9:02 AM > To: Maria Rita PALATTELLA; Qin Wang > Cc: Thomas Watteyne; 6tsch@ietf.org > Subject: RE: [6tsch] About the special type of event to ask PCE to create= a > track > > > > Fine with me Maria Rita, > > > > But note that there is also a flow that fits the name =93schedule flow=94= that > is stimulated by the Net mgt Entity in the admin console as opposed to th= e > mt entity in the device. > > Same thing, this creates a req to the PCE to install a track. Do we want = to > merge those 2 flows? =96 I think so. > > > > Cheers, > > > > Pascal > > > > From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] > Sent: jeudi 5 septembre 2013 08:47 > To: Pascal Thubert (pthubert); Qin Wang > Cc: Thomas Watteyne; 6tsch@ietf.org > Subject: RE: [6tsch] About the special type of event to ask PCE to create= a > track > > > > I agree too. If we want to cut the name shorter, maybe we can just call i= t =93 > Schedule Flow=94 (removing the update). > > In the end, we know that this flow will happen when a node asks the PCE t= o > update its schedule, and add/remove cells/tracks. What do you think? > > Maria Rita > > > > From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of > Pascal Thubert (pthubert) > Sent: Thursday, September 05, 2013 7:29 AM > To: Qin Wang > Cc: Thomas Watteyne; 6tsch@ietf.org > Subject: Re: [6tsch] About the special type of event to ask PCE to create= a > track > > > > +1 > > Pascal > > > Le 5 sept. 2013 =E0 00:10, "Qin Wang" a =E9crit : > > Thomas, > > > > I think "Flow" is a process to exchange messages for a given objective. F= or > example, action flow consists of a Action Request from ME to 6top, and a > Execution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update > request" looks like one step of a process. I would like to suggest that t= he > 5th flow is called "Schedule update flow", consists of a "Schedule update > request" from node to PCE, and something like "Track/cell installation" f= rom > PCE to node. > > > > Make sense? > > Qin > > > > On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne > wrote: > > I would agree that a 5th flow makes sense, especially because it allows u= s > to use different transport mechanisms for the report flow (CoAP?) and thi= s > new flows (CoAP now? maybe PCEP later?). > > > > Do what do we call this new flow? "Schedule update request" is a bit long= . > > > > Thomas > > > > On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang wrote: > > Hi Thomas, > > > > Thanks for your explanation. You are saying the request packet from node = is > generated by the upper layer of 6top, correct? > > > > If so, since the request packet is generated by upper layer of 6top, inst= ead > of 6top internal events like alarm, I think it is reasonable to add the 5= th > control flow. > > > > What do you think? > > > > Qin > > > > On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne > wrote: > > Qin, > > > > Thanks for bringing that up. Allow me to answer in Pascal's place. We are > talking about the format of the packets exchanged between the ME and the > nodes. In the centralized case, these are application-level packets, i.e. > packet generated by an entity a couple of layer above 6top. That entity > talks with the PCE over the network, and with 6top through the API (inter= nal > to the node) as defined in > http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4. > > > > If we agree on that, the question is whether the packet the node sends to > establish a new track is part of the event flow, or not. In both cases, i= t > would originate from this application-level entity, but possibly transpor= ted > in different ways. > > > > Thomas > > > > On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang wrote: > > Hi Pascal, > > > > My understanding is that 6top is a passive role in dealing with cell/trac= k > reservation. In another word, the 6top in a node can report its state, > including neighbor table, cell usage, and other statistics information, b= ut > can not make decision on if some cells/track should be added or removed, > which should be the responsibility of PCE in centralized case or upper la= yer > in distributed case. Thus, I can not see when the 5th flow will be used. = Can > you explain more? > > > > Thanks > > Qin > > > > On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) > wrote: > > Dear all, > > We discussed at the call that the(PCEP?) request to ask for a track > establishment could be seen as an event, or could be a new flow. > At the call, I suggested that it could be a new, 5th flow. My arguments a= re > that this flow: > - Probably yields different data format. The demand carries and points, e= nd > to end latency and bandwidth. That's quite specific. > - Probably yields a different flow. Events do not necessarily have a > response. > - Probably uses a different transport as well (PCEP vs. CoAP) > > What do you think? > > Pascal > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > --=20 DIEGO DUJOVNE Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl (56 2) 676 8125 From qinwang@berkeley.edu Thu Sep 5 10:44:51 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4F9C111E825C for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 10:44:51 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.592 X-Spam-Level: X-Spam-Status: No, score=-2.592 tagged_above=-999 required=5 tests=[AWL=-0.216, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_34=0.6, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id S5cuJvILRJiz for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 10:44:47 -0700 (PDT) Received: from mail-vb0-f54.google.com (mail-vb0-f54.google.com [209.85.212.54]) by ietfa.amsl.com (Postfix) with ESMTP id 12E4B11E824D for <6tsch@ietf.org>; Thu, 5 Sep 2013 10:44:46 -0700 (PDT) Received: by mail-vb0-f54.google.com with SMTP id q14so1423759vbe.27 for <6tsch@ietf.org>; Thu, 05 Sep 2013 10:44:46 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=wZ0PPDQj50Nk0j6UUwguGM52lUoOM3MiD2/XB2+WFHk=; b=Wa6KhnEP24oI09Z6ntAEIbePyVYli0+VOpE/4H259vcKbu6sN32ZYeQm3rzw41lzcC ks2VJE5DpuFNJ1DgvANT6gO2NqLtullRGaXQAZvisXaNqrm7CeFYx+8KffwaxSLmVLfd a+6N5RpQxHBMV3mnXv1eIqiZ4EriIm8waw6+CYZypfjR28u2beRybweeEYRjbEN0v1mQ 4KUqxRKuCcPbmZXuYav0zzUso1f6qqC0/uwjCj6uqnQx1CaOiMd6e7OGo2FRNU3HfJ/y xX6HJlNQb9M9u4l2pv1QasE1q9sIFH7GY73pGpu6RailPST7ZFtAw4niooU/FuCL5oJR CB+Q== X-Gm-Message-State: ALoCoQlxznlHqrdYdaR9g3IcoW+LHDJkBEbJ9kCmEvWLZT59H2t0tGHF16NGadZGLvmzWRG4mhSl MIME-Version: 1.0 X-Received: by 10.52.227.6 with SMTP id rw6mr3311577vdc.19.1378403086178; Thu, 05 Sep 2013 10:44:46 -0700 (PDT) Received: by 10.220.116.135 with HTTP; Thu, 5 Sep 2013 10:44:46 -0700 (PDT) In-Reply-To: References: Date: Fri, 6 Sep 2013 01:44:46 +0800 Message-ID: From: Qin Wang To: "Prof. Diego Dujovne" Content-Type: multipart/alternative; boundary=089e011616604f28cf04e5a67ab2 Cc: Maria Rita PALATTELLA , Thomas Watteyne , "Pascal Thubert \(pthubert\)" , "6tsch@ietf.org" <6tsch@ietf.org>, "JP Vasseur \(jvasseur\)" Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 17:44:51 -0000 --089e011616604f28cf04e5a67ab2 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Thomas and all, >From above discussion, I feel that two kinds of flows are involved, one is basic control flow like Action flow and Query flow; another is combinational control flow, which will call basic control flow, e.g. the schedule flow will call Action flow. Should we define basic control flow and combinational control flow separately? Thanks Qin On Thu, Sep 5, 2013 at 8:40 PM, Prof. Diego Dujovne < diego.dujovne@mail.udp.cl> wrote: > Dear All, > Then, we have two flows to update the track: > Schedule flow (6top to ME): An action flow to ask for a new cell/track > - Execution Confirm (Success/Failure) if requested > This means that the request was queued. > Action flow (ME to 6top): An action flow to announce the update of the > schedule - Execution Confirm (Success/Failure) > What happens if the queued request cannot be satisfied (e.g. energy > policy restriction)? > Comments? > > Diego Dujovne > > > > 2013/9/5 Pascal Thubert (pthubert) : > > Yes=85 > > > > > > > > And the aim should be to make sure that the PCE has queued the request = to > > build a track. > > > > That request may be served asynchronously, considering that the PCE > > sometimes needs to defragment / reoptimize multiple flows, and it may > stack > > some requests for a short while. > > > > When the PCE is finally ready, it computes the track, and pushes it > through > > an action flow; but I would consider that a different flow, not an > embedded > > flow for the reason above. > > > > > > > > Makes sense? > > > > > > > > Pascal > > > > > > > > From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] > > Sent: jeudi 5 septembre 2013 09:16 > > > > > > To: Pascal Thubert (pthubert); Qin Wang > > Cc: Thomas Watteyne; 6tsch@ietf.org > > Subject: RE: [6tsch] About the special type of event to ask PCE to > create a > > track > > > > > > > > It makes sense for me. Even though they are generated by different > entities, > > they are both addressed to the PCE, and they have the same final aim. > > > > Maria Rita > > > > > > > > From: Pascal Thubert (pthubert) [mailto:pthubert@cisco.com] > > Sent: Thursday, September 05, 2013 9:02 AM > > To: Maria Rita PALATTELLA; Qin Wang > > Cc: Thomas Watteyne; 6tsch@ietf.org > > Subject: RE: [6tsch] About the special type of event to ask PCE to > create a > > track > > > > > > > > Fine with me Maria Rita, > > > > > > > > But note that there is also a flow that fits the name =93schedule flow= =94 > that > > is stimulated by the Net mgt Entity in the admin console as opposed to > the > > mt entity in the device. > > > > Same thing, this creates a req to the PCE to install a track. Do we wan= t > to > > merge those 2 flows? =96 I think so. > > > > > > > > Cheers, > > > > > > > > Pascal > > > > > > > > From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] > > Sent: jeudi 5 septembre 2013 08:47 > > To: Pascal Thubert (pthubert); Qin Wang > > Cc: Thomas Watteyne; 6tsch@ietf.org > > Subject: RE: [6tsch] About the special type of event to ask PCE to > create a > > track > > > > > > > > I agree too. If we want to cut the name shorter, maybe we can just call > it =93 > > Schedule Flow=94 (removing the update). > > > > In the end, we know that this flow will happen when a node asks the PCE > to > > update its schedule, and add/remove cells/tracks. What do you think? > > > > Maria Rita > > > > > > > > From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf > Of > > Pascal Thubert (pthubert) > > Sent: Thursday, September 05, 2013 7:29 AM > > To: Qin Wang > > Cc: Thomas Watteyne; 6tsch@ietf.org > > Subject: Re: [6tsch] About the special type of event to ask PCE to > create a > > track > > > > > > > > +1 > > > > Pascal > > > > > > Le 5 sept. 2013 =E0 00:10, "Qin Wang" a =E9crit = : > > > > Thomas, > > > > > > > > I think "Flow" is a process to exchange messages for a given objective. > For > > example, action flow consists of a Action Request from ME to 6top, and = a > > Execution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update > > request" looks like one step of a process. I would like to suggest that > the > > 5th flow is called "Schedule update flow", consists of a "Schedule upda= te > > request" from node to PCE, and something like "Track/cell installation" > from > > PCE to node. > > > > > > > > Make sense? > > > > Qin > > > > > > > > On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> > > wrote: > > > > I would agree that a 5th flow makes sense, especially because it allows > us > > to use different transport mechanisms for the report flow (CoAP?) and > this > > new flows (CoAP now? maybe PCEP later?). > > > > > > > > Do what do we call this new flow? "Schedule update request" is a bit > long. > > > > > > > > Thomas > > > > > > > > On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang wrote: > > > > Hi Thomas, > > > > > > > > Thanks for your explanation. You are saying the request packet from nod= e > is > > generated by the upper layer of 6top, correct? > > > > > > > > If so, since the request packet is generated by upper layer of 6top, > instead > > of 6top internal events like alarm, I think it is reasonable to add the > 5th > > control flow. > > > > > > > > What do you think? > > > > > > > > Qin > > > > > > > > On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne > > wrote: > > > > Qin, > > > > > > > > Thanks for bringing that up. Allow me to answer in Pascal's place. We a= re > > talking about the format of the packets exchanged between the ME and th= e > > nodes. In the centralized case, these are application-level packets, i.= e. > > packet generated by an entity a couple of layer above 6top. That entity > > talks with the PCE over the network, and with 6top through the API > (internal > > to the node) as defined in > > http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4. > > > > > > > > If we agree on that, the question is whether the packet the node sends = to > > establish a new track is part of the event flow, or not. In both cases, > it > > would originate from this application-level entity, but possibly > transported > > in different ways. > > > > > > > > Thomas > > > > > > > > On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang wrote= : > > > > Hi Pascal, > > > > > > > > My understanding is that 6top is a passive role in dealing with > cell/track > > reservation. In another word, the 6top in a node can report its state, > > including neighbor table, cell usage, and other statistics information, > but > > can not make decision on if some cells/track should be added or removed= , > > which should be the responsibility of PCE in centralized case or upper > layer > > in distributed case. Thus, I can not see when the 5th flow will be used= . > Can > > you explain more? > > > > > > > > Thanks > > > > Qin > > > > > > > > On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) > > wrote: > > > > Dear all, > > > > We discussed at the call that the(PCEP?) request to ask for a track > > establishment could be seen as an event, or could be a new flow. > > At the call, I suggested that it could be a new, 5th flow. My arguments > are > > that this flow: > > - Probably yields different data format. The demand carries and points, > end > > to end latency and bandwidth. That's quite specific. > > - Probably yields a different flow. Events do not necessarily have a > > response. > > - Probably uses a different transport as well (PCEP vs. CoAP) > > > > What do you think? > > > > Pascal > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > > > > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > > > > > > > > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > -- > DIEGO DUJOVNE > Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones > Facultad de Ingenier=EDa UDP > www.ingenieria.udp.cl > (56 2) 676 8125 > --089e011616604f28cf04e5a67ab2 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hi Thomas and all,

From above discussio= n, I feel that two kinds of flows are involved, one is basic control flow l= ike Action flow and Query flow; another is combinational control flow, whic= h will call basic control flow, e.g. the schedule flow will call Action flo= w.=A0

Should we define basic control flow and combinational c= ontrol flow separately?

Thanks
Qin
=


On Thu,= Sep 5, 2013 at 8:40 PM, Prof. Diego Dujovne <diego.dujovne@mail.= udp.cl> wrote:
Dear All,
=A0 =A0 =A0 =A0 =A0 =A0 Then, we have two flows to update the track:
Schedule flow (6top to ME): An action flow to ask for a new cell/track
- Execution Confirm (Success/Failure) if requested
This means that the request was queued.
Action flow (ME to 6top): An action flow to announce the update of the
schedule - Execution Confirm (Success/Failure)
What happens if the queued request cannot be satisfied (e.g. energy
policy restriction)?
Comments?

=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Diego Dujovne



2013/9/5 Pascal Thubert (pthubert) <pthubert@cisco.com>:
> Yes=85
>
>
>
> And the aim should be to make sure that the PCE has queued the request= to
> build a track.
>
> That request may be served asynchronously, considering that the PCE > sometimes needs to defragment / reoptimize multiple flows, and it may = stack
> some requests for a short while.
>
> When the PCE is finally ready, it computes the track, and pushes it th= rough
> an action flow; but I would consider that a different flow, not an emb= edded
> flow for the reason above.
>
>
>
> Makes sense?
>
>
>
> Pascal
>
>
>
> From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu]
> Sent: jeudi 5 septembre 2013 09:16
>
>
> To: Pascal Thubert (pthubert); Qin Wang
> Cc: Thomas Watteyne; 6tsch@ietf.org<= /a>
> Subject: RE: [6tsch] About the special type of event to ask PCE to cre= ate a
> track
>
>
>
> It makes sense for me. Even though they are generated by different ent= ities,
> they are both addressed to the PCE, and they have the same final aim.<= br> >
> Maria Rita
>
>
>
> From: Pascal Thubert (pthubert) [mailto:pthubert@cisco.com]
> Sent: Thursday, September 05, 2013 9:02 AM
> To: Maria Rita PALATTELLA; Qin Wang
> Cc: Thomas Watteyne; 6tsch@ietf.org<= /a>
> Subject: RE: [6tsch] About the special type of event to ask PCE to cre= ate a
> track
>
>
>
> Fine with me Maria Rita,
>
>
>
> But note that there is also a flow that fits the name =93schedule flow= =94 that
> is stimulated by the Net mgt Entity in the admin console as opposed to= the
> mt entity in the device.
>
> Same thing, this creates a req to the PCE to install a track. Do we wa= nt to
> merge those 2 flows? =96 I think so.
>
>
>
> Cheers,
>
>
>
> Pascal
>
>
>
> From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu]
> Sent: jeudi 5 septembre 2013 08:47
> To: Pascal Thubert (pthubert); Qin Wang
> Cc: Thomas Watteyne; 6tsch@ietf.org<= /a>
> Subject: RE: [6tsch] About the special type of event to ask PCE to cre= ate a
> track
>
>
>
> I agree too. If we want to cut the name shorter, maybe we can just cal= l it =93
> Schedule Flow=94 (removing the update).
>
> In the end, we know that this flow will happen when a node asks the PC= E to
> update its schedule, and add/remove cells/tracks. What do you think? >
> Maria Rita
>
>
>
> From: 6tsch-bounces@ietf.org= [mailto:6tsch-bounces@ietf.o= rg] On Behalf Of
> Pascal Thubert (pthubert)
> Sent: Thursday, September 05, 2013 7:29 AM
> To: Qin Wang
> Cc: Thomas Watteyne; 6tsch@ietf.org<= /a>
> Subject: Re: [6tsch] About the special type of event to ask PCE to cre= ate a
> track
>
>
>
> +1
>
> Pascal
>
>
> Le 5 sept. 2013 =E0 00:10, "Qin Wang" <qinwang@berkeley.edu> a =E9crit :
>
> Thomas,
>
>
>
> I think "Flow" is a process to exchange messages for a given= objective. For
> example, action flow consists of a Action Request from ME to 6top, and= a
> Execution Confirm (Succ/Fail) from 6top to ME. But, "Schedule upd= ate
> request" looks like one step of a process. I would like to sugges= t that the
> 5th flow is called "Schedule update flow", consists of a &qu= ot;Schedule update
> request" from node to PCE, and something like "Track/cell in= stallation" from
> PCE to node.
>
>
>
> Make sense?
>
> Qin
>
>
>
> On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu>
> wrote:
>
> I would agree that a 5th flow makes sense, especially because it allow= s us
> to use different transport mechanisms for the report flow (CoAP?) and = this
> new flows (CoAP now? maybe PCEP later?).
>
>
>
> Do what do we call this new flow? "Schedule update request" = is a bit long.
>
>
>
> Thomas
>
>
>
> On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang <qinwang@berkeley.edu> wrote:
>
> Hi Thomas,
>
>
>
> Thanks for your explanation. You are saying the request packet from no= de is
> generated by the upper layer of 6top, correct?
>
>
>
> If so, since the request packet is generated by upper layer of 6top, i= nstead
> of 6top internal events like alarm, I think it is reasonable to add th= e 5th
> control flow.
>
>
>
> What do you think?
>
>
>
> Qin
>
>
>
> On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne
> <watteyne@eecs.berkel= ey.edu> wrote:
>
> Qin,
>
>
>
> Thanks for bringing that up. Allow me to answer in Pascal's place.= We are
> talking about the format of the packets exchanged between the ME and t= he
> nodes. In the centralized case, these are application-level packets, i= .e.
> packet generated by an entity a couple of layer above 6top. That entit= y
> talks with the PCE over the network, and with 6top through the API (in= ternal
> to the node) as defined in
> http://tools.ietf.org/html/draft-wang-6tsch-6top-00= #section-2.4.
>
>
>
> If we agree on that, the question is whether the packet the node sends= to
> establish a new track is part of the event flow, or not. In both cases= , it
> would originate from this application-level entity, but possibly trans= ported
> in different ways.
>
>
>
> Thomas
>
>
>
> On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang <qinwang@berkeley.edu> wrote:
>
> Hi Pascal,
>
>
>
> My understanding is that 6top is a passive role in dealing with cell/t= rack
> reservation. In another word, the 6top in a node can report its state,=
> including neighbor table, cell usage, and other statistics information= , but
> can not make decision on if some cells/track should be added or remove= d,
> which should be the responsibility of PCE in centralized case or upper= layer
> in distributed case. Thus, I can not see when the 5th flow will be use= d. Can
> you explain more?
>
>
>
> Thanks
>
> Qin
>
>
>
> On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert)
> <pthubert@cisco.com> w= rote:
>
> Dear all,
>
> We discussed at the call that the(PCEP?) request to ask for a track > establishment could be seen as an event, or could be a new flow.
> At the call, I suggested that it could be a new, 5th flow. My argument= s are
> that this flow:
> - Probably yields different data format. The demand carries and points= , end
> to end latency and bandwidth. That's quite specific.
> - Probably yields a different flow. Events do not necessarily have a > response.
> - Probably uses a different transport as well (PCEP vs. CoAP)
>
> What do you think?
>
> Pascal
> _______________________________________________
> 6tsch mailing list
> 6tsch@ietf.org
> https://www.ietf.org/mailman/listinfo/6tsch
>
>
>
>
> _______________________________________________
> 6tsch mailing list
> 6tsch@ietf.org
> https://www.ietf.org/mailman/listinfo/6tsch
>
>
> _______________________________________________
> 6tsch mailing list
> 6tsch@ietf.org
> https://www.ietf.org/mailman/listinfo/6tsch
>
>
>
>
>
>
> _______________________________________________
> 6tsch mailing list
> 6tsch@ietf.org
> https://www.ietf.org/mailman/listinfo/6tsch
>
>
>
> _______________________________________________
> 6tsch mailing list
> 6tsch@ietf.org
> https://www.ietf.org/mailman/listinfo/6tsch
>
>
> _______________________________________________
> 6tsch mailing list
> 6tsch@ietf.org
> https://www.ietf.org/mailman/listinfo/6tsch
>



--
DIEGO DUJOVNE
Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP
www.ingenieria.u= dp.cl
(56 2) 676 8125

--089e011616604f28cf04e5a67ab2-- From twatteyne@gmail.com Thu Sep 5 10:47:17 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 41A6E11E825B for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 10:47:16 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.582 X-Spam-Level: X-Spam-Status: No, score=-1.582 tagged_above=-999 required=5 tests=[AWL=-0.205, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_34=0.6, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2157DF8wvc42 for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 10:47:14 -0700 (PDT) Received: from mail-pd0-x22a.google.com (mail-pd0-x22a.google.com [IPv6:2607:f8b0:400e:c02::22a]) by ietfa.amsl.com (Postfix) with ESMTP id D5C9811E8258 for <6tsch@ietf.org>; Thu, 5 Sep 2013 10:47:13 -0700 (PDT) Received: by mail-pd0-f170.google.com with SMTP id x10so2135369pdj.1 for <6tsch@ietf.org>; Thu, 05 Sep 2013 10:47:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=4r2WXpOTYSsubHoq+myPOG8ZmMy7rm+WKk+fZ36A+/k=; b=tlySN4MJqwakRfSou9juim9WUlz+6DDhqFW2MFqn+teFIht35t+gmGj+6ZF5Y5yZus Hxliu+bqdAHoDmZ8N0+j2V4AeQNAE7bP06Ql2wZQruuQni18dumDVUEQdy25NAce2jB+ Z9/iz22SZ1CMZLnWxFYsNsRtf4Xat8oeEm17OxrT0CfPj+Sl99BtgtLKwxWKZrd44ZL8 7KQMBazQDrxFsd+kvweRYa5vquGthgv9psHsu0anab67sR/SqsJgLzhcWMMaxmGDkdWI HVBzqEOjrXzEiDvMmA2yORyUQm9RU1jEt0Je10iqH8JVYERXrbLOS2UgIpuHKq9GmmfG Jlng== X-Received: by 10.66.142.107 with SMTP id rv11mr10790318pab.17.1378403233561; Thu, 05 Sep 2013 10:47:13 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Thu, 5 Sep 2013 10:46:53 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Thu, 5 Sep 2013 10:46:53 -0700 X-Google-Sender-Auth: GqbsaQtmT8C7LJqt-Yhbn5MiuvQ Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=001a11331e461804ae04e5a68356 Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 17:47:17 -0000 --001a11331e461804ae04e5a68356 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Pascal, Just trying to make sure I'm on the same page. The second "schedule update request" flow would come from a different entity than the mote, right? I'm thinking for example about a controller on the Internet wanting to send data to a mote, and which contacts the PCE to update the schedule accordingly. What's your example? That being said, I believe we are in line here, and I agree taht it's a good idea to merge the two "schedule update request" flow flavors. Thomas On Thu, Sep 5, 2013 at 12:25 AM, Pascal Thubert (pthubert) < pthubert@cisco.com> wrote: > Yes=85**** > > ** ** > > And the aim should be to make sure that the PCE has queued the request to > build a track.**** > > That request may be served asynchronously, considering that the PCE > sometimes needs to defragment / reoptimize multiple flows, and it may sta= ck > some requests for a short while.**** > > When the PCE is finally ready, it computes the track, and pushes it > through an action flow; but I would consider that a different flow, not a= n > embedded flow for the reason above.**** > > ** ** > > Makes sense?**** > > ** ** > > Pascal**** > > ** ** > > *From:* Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] > *Sent:* jeudi 5 septembre 2013 09:16 > > *To:* Pascal Thubert (pthubert); Qin Wang > *Cc:* Thomas Watteyne; 6tsch@ietf.org > *Subject:* RE: [6tsch] About the special type of event to ask PCE to > create a track**** > > ** ** > > It makes sense for me. Even though they are generated by different > entities, they are both addressed to the PCE, and they have the same fina= l > aim.**** > > Maria Rita**** > > **** > > *From:* Pascal Thubert (pthubert) [mailto:pthubert@cisco.com] > > *Sent:* Thursday, September 05, 2013 9:02 AM > *To:* Maria Rita PALATTELLA; Qin Wang > *Cc:* Thomas Watteyne; 6tsch@ietf.org > *Subject:* RE: [6tsch] About the special type of event to ask PCE to > create a track**** > > **** > > Fine with me Maria Rita,**** > > **** > > But note that there is also a flow that fits the name =93schedule flow=94= that > is stimulated by the Net mgt Entity in the admin console as opposed to th= e > mt entity in the device.**** > > Same thing, this creates a req to the PCE to install a track. Do we want > to merge those 2 flows? =96 I think so.**** > > **** > > Cheers,**** > > **** > > Pascal**** > > **** > > *From:* Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] > > *Sent:* jeudi 5 septembre 2013 08:47 > *To:* Pascal Thubert (pthubert); Qin Wang > *Cc:* Thomas Watteyne; 6tsch@ietf.org > *Subject:* RE: [6tsch] About the special type of event to ask PCE to > create a track**** > > **** > > I agree too. If we want to cut the name shorter, maybe we can just call i= t > =93 Schedule Flow=94 (removing the update).**** > > In the end, we know that this flow will happen when a node asks the PCE t= o > update its schedule, and add/remove cells/tracks. What do you think?**** > > Maria Rita**** > > **** > > *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org<6tsch-bounc= es@ietf.org>] > *On Behalf Of *Pascal Thubert (pthubert) > *Sent:* Thursday, September 05, 2013 7:29 AM > *To:* Qin Wang > *Cc:* Thomas Watteyne; 6tsch@ietf.org > *Subject:* Re: [6tsch] About the special type of event to ask PCE to > create a track**** > > **** > > +1 > > Pascal**** > > > Le 5 sept. 2013 =E0 00:10, "Qin Wang" a =E9crit :*= *** > > Thomas, **** > > **** > > I think "Flow" is a process to exchange messages for a given objective. > For example, action flow consists of a Action Request from ME to 6top, an= d > a Execution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update > request" looks like one step of a process. I would like to suggest that t= he > 5th flow is called "Schedule update flow", consists of a "Schedule update > request" from node to PCE, and something like "Track/cell installation" > from PCE to node.**** > > **** > > Make sense?**** > > Qin**** > > **** > > On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > I would agree that a 5th flow makes sense, especially because it allows u= s > to use different transport mechanisms for the report flow (CoAP?) and thi= s > new flows (CoAP now? maybe PCEP later?). **** > > **** > > Do what do we call this new flow? "Schedule update request" is a bit long= . > **** > > **** > > Thomas**** > > **** > > On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang wrote:***= * > > Hi Thomas, **** > > **** > > Thanks for your explanation. You are saying the request packet from node > is generated by the upper layer of 6top, correct? **** > > **** > > If so, since the request packet is generated by upper layer of 6top, > instead of 6top internal events like alarm, I think it is reasonable to a= dd > the 5th control flow.**** > > **** > > What do you think?**** > > **** > > Qin**** > > **** > > On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > Qin, **** > > **** > > Thanks for bringing that up. Allow me to answer in Pascal's place. We are > talking about the format of the packets exchanged between the ME and the > nodes. In the centralized case, these are application-level packets, i.e. > packet generated by an entity a couple of layer above 6top. That entity > talks with the PCE over the network, and with 6top through the API > (internal to the node) as defined in > http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4.**** > > **** > > If we agree on that, the question is whether the packet the node sends to > establish a new track is part of the event flow, or not. In both cases, i= t > would originate from this application-level entity, but possibly > transported in different ways.**** > > **** > > Thomas**** > > **** > > On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang wrote:*= * > ** > > Hi Pascal, **** > > **** > > My understanding is that 6top is a passive role in dealing with cell/trac= k > reservation. In another word, the 6top in a node can report its state, > including neighbor table, cell usage, and other statistics information, b= ut > can not make decision on if some cells/track should be added or removed, > which should be the responsibility of PCE in centralized case or upper > layer in distributed case. Thus, I can not see when the 5th flow will be > used. Can you explain more?**** > > **** > > Thanks**** > > Qin**** > > **** > > On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) < > pthubert@cisco.com> wrote:**** > > Dear all, > > We discussed at the call that the(PCEP?) request to ask for a track > establishment could be seen as an event, or could be a new flow. > At the call, I suggested that it could be a new, 5th flow. My arguments > are that this flow: > - Probably yields different data format. The demand carries and points, > end to end latency and bandwidth. That's quite specific. > - Probably yields a different flow. Events do not necessarily have a > response. > - Probably uses a different transport as well (PCEP vs. CoAP) > > What do you think? > > Pascal > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > **** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > **** > > **** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > **** > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > --001a11331e461804ae04e5a68356 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Pascal,
Just trying to make sure I'm on the same p= age. The second "schedule update request" flow would come from a = different entity than the mote, right? I'm thinking for example about a= controller on the Internet wanting to send data to a mote, and which conta= cts the PCE to update the schedule accordingly. What's your example? Th= at being said, I believe we are in line here, and I agree taht it's a g= ood idea to merge the two "schedule update request" flow flavors.=
Thomas


On Thu, Sep 5, 2013 at 12:25 AM, Pascal Thubert (pthubert) <pth= ubert@cisco.com> wrote:

Yes=85

=A0<= /p>

And the aim should be to = make sure that the PCE has queued the request to build a track.

That request may be serve= d asynchronously, considering that the PCE sometimes needs to defragment / = reoptimize multiple flows, and it may stack some requests for a short while.

When the PCE is finally r= eady, it computes the track, and pushes it through an action flow; but I wo= uld consider that a different flow, not an embedded flow for the reason above.

=A0<= /p>

Makes sense?

=A0<= /p>

Pascal=

=A0<= /p>

From: Maria Ri= ta PALATTELLA [mailto:maria-rita.palattella@uni.lu]
Sent: jeudi 5 septembre 2013 09:16

=
To: Pascal Thubert (pthubert); Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.org
Subject: RE: [6tsch] About the special type of event to ask PCE to c= reate a track

=A0

It makes sense for me. Ev= en though they are generated by different entities, they are both addressed= to the PCE, and they have the same final aim.

Maria Rita<= u>

=A0<= /p>

From: Pascal T= hubert (pthubert) [= mailto:pthubert@cisco.com]
Sent: Thursday, September 05, 2013 9:02 AM
To: Maria Rita PALATTELLA; Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.org
Subject: RE: [6tsch] About the special type of event to ask PCE to c= reate a track

=A0

Fine with me Maria Rita,<= /span>

=A0<= /p>

But note that there is al= so a flow that fits the name =93schedule flow=94 that is stimulated by the = Net mgt Entity in the admin console as opposed to the mt entity in the device.

Same thing, this creates = a req to the PCE to install a track. Do we want to merge those 2 flows? =96= I think so.

=A0<= /p>

Cheers,<= /u>

=A0<= /p>

Pascal=

=A0<= /p>

From: Maria Ri= ta PALATTELLA [mailto:maria-rita.palattella@uni.lu]
Sent: jeudi 5 septembre 2013 08:47
To: Pascal Thubert (pthubert); Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.org
Subject: RE: [6tsch] About the special type of event to ask PCE to c= reate a track

=A0

I agree too. If we want t= o cut the name shorter, maybe we can just call it =93 Schedule Flow=94 (rem= oving the update).

In the end, we know that = this flow will happen when a node asks the PCE to update its schedule, and = add/remove cells/tracks. What do you think?

Maria Rita<= u>

=A0<= /p>

From: 6tsch-bounces@i= etf.org [ma= ilto:6tsch-bounces@ietf.org] On Behalf Of Pascal Thubert (pthubert)
Sent: Thursday, September 05, 2013 7:29 AM
To: Qin Wang
Cc: Thomas Watteyne; 6tsch@ietf.org
Subject: Re: [6tsch] About the special type of event to ask PCE to c= reate a track

=A0

+1

Pascal


Le 5 sept. 2013 =E0 00:10, "Qin Wang" <qinwang@berkeley.edu> a =E9crit= =A0:

Thomas,

=A0

I think "Flow" is a process to exchange me= ssages for a given objective. For example, action flow consists of a Action= Request from ME to 6top, and a Execution Confirm (Succ/Fail) from 6top to = ME. But, "Schedule update request" looks like one step of a process. I would like to suggest that the 5th flow is called= "Schedule update flow", consists of a "Schedule update requ= est" from node to PCE, and something like "Track/cell installatio= n" from PCE to node.

=A0

Make sense?

Qin

=A0

On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

I would agree that a 5th flow makes sense, especiall= y because it allows us to use different transport mechanisms for the report= flow (CoAP?) and this new flows (CoAP now? maybe PCEP later?).

=A0

Do what do we call this new flow? "Schedule upd= ate request" is a bit long.

=A0

Thomas

=A0

On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang <qinwang@berkeley.edu= > wrote:

Hi Thomas,

=A0

Thanks for your explanation. You are saying the requ= est packet from node is generated by the upper layer of 6top, correct?=A0

=A0

If so, since the request packet is generated by uppe= r layer of 6top, instead of 6top internal events like alarm, I think it is = reasonable to add the 5th control flow.

=A0

What do you think?

=A0

Qin

=A0

On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

Qin,

=A0

Thanks for bringing that up. Allow me to answer in P= ascal's place. We are talking about the format of the packets exchanged= between the ME and the nodes. In the centralized case, these are applicati= on-level packets, i.e. packet generated by an entity a couple of layer above 6top. That entity talks with the PCE = over the network, and with 6top through the API (internal to the node) as d= efined in=A0http://tools.ietf.org/html/draft-wang-6tsch-= 6top-00#section-2.4.

=A0

If we agree on that, the question is whether the pac= ket the node sends to establish a new track is part of the event flow, or n= ot. In both cases, it would originate from this application-level entity, b= ut possibly transported in different ways.

=A0

Thomas

=A0

On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi Pascal,

=A0

My understanding is that 6top is a passive role in d= ealing with cell/track reservation. In another word, the 6top in a node can= report its state, including neighbor table, cell usage, and other statisti= cs information, but can not make decision on if some cells/track should be added or removed, which should be the res= ponsibility of PCE in centralized case or upper layer in distributed case. = Thus, I can not see when the 5th flow will be used. Can you explain more?

=A0

Thanks

Qin

=A0

On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pt= hubert) <pthuber= t@cisco.com> wrote:

Dear all,

We discussed at the call that the(PCEP?) request to ask for a track establi= shment could be seen as an event, or could be a new flow.
At the call, I suggested that it could be a new, 5th flow. My arguments are= that this flow:
- Probably yields different data format. The demand carries and points, end= to end latency and bandwidth. That's quite specific.
- Probably yields a different flow. Events do not necessarily have a respon= se.
- Probably uses a different transport as well (PCEP vs. CoAP)

What do you think?

Pascal
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=A0


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=A0

=A0


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--001a11331e461804ae04e5a68356-- From xvilajosana@berkeley.edu Thu Sep 5 11:15:53 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DD0CA21E8142 for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 11:15:52 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.241 X-Spam-Level: X-Spam-Status: No, score=-2.241 tagged_above=-999 required=5 tests=[AWL=-0.265, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KuRr6YIC79mk for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 11:15:48 -0700 (PDT) Received: from mail-pd0-f169.google.com (mail-pd0-f169.google.com [209.85.192.169]) by ietfa.amsl.com (Postfix) with ESMTP id 49B5A21E8133 for <6tsch@ietf.org>; Thu, 5 Sep 2013 11:15:47 -0700 (PDT) Received: by mail-pd0-f169.google.com with SMTP id r10so2162750pdi.14 for <6tsch@ietf.org>; Thu, 05 Sep 2013 11:15:47 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=dJde4hjaR1qMh3gU29/rWEs+XkNhuGoLLEAhrDqPGOA=; b=Fm99iTyWdBX3xxtHDbOJ1xQBPMZHyqzaNJBVBZdKJGomfCSvibRREb9VK6A+jnyWld 30foaarb/N8NI/3ruwucOg4ehcPvvMXyYY7DN7PyInjcBs+Nnafhxenh/xdnDiEKI3Uv z6nL2eLvIdDiDgeJs8lsIibAYTkkk+f6Z9iUZlGCRzV4lewk0bzYhZK6osH5Dhwk9GnZ o0X5PZWY90Cg9H7q0X6cZ2GFo8lcbjovhh77AIgRlcXP0iXV2d1H3VhYYB+57tg3lLpC z17NwZnQAXkYFlIn++N1j4aWdVHKmLEpPFBmvb8w+b7AJfWc7YWc4Xq9HSnk8eCz3zCq U6zQ== X-Gm-Message-State: ALoCoQn5YnGQkco61lB0wcgo8PAONJgFvFNcJoy7+7O8tZuHAv0Z9HQg65KIE43UGQQln1dFNXyo MIME-Version: 1.0 X-Received: by 10.68.143.199 with SMTP id sg7mr10791726pbb.13.1378404947113; Thu, 05 Sep 2013 11:15:47 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Thu, 5 Sep 2013 11:15:47 -0700 (PDT) In-Reply-To: References: Date: Thu, 5 Sep 2013 11:15:47 -0700 Message-ID: From: Xavier Vilajosana Guillen To: Qin Wang Content-Type: multipart/alternative; boundary=047d7b2e3f063ac63004e5a6e92c Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] (no subject) X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 18:15:53 -0000 --047d7b2e3f063ac63004e5a6e92c Content-Type: text/plain; charset=ISO-8859-1 Hello, I guess that flows are getting defined and I started to think on the contents of the messages on that flows. Not sure if this is the right time or I am going way far.. According to the previous discussion I assume that the five flows are: ME-6TOP - Query Flow ME-6TOP - Action Flow 6TOP - ME - Report Flow 6TOP - ME - Event Flow 6TOP - ME - Request BW Flow I'd like to start defining the content of the messages in the Report Flow: The Report Flow: has to deal with the information that a node knows and has to be sent to the ME so the ME can compute the schedule among others. Here I list the information that we can know in a mote and can be used at the ME to compute the schedule (complete please if I miss something) For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -Num TX packets -Num ACK packets -Num RX packets -Last ASN when it heart about that neighbor Other fields -Num links in the Schedule to that neighbor -For each link PDR Then we need to have some TLV like objects that can be used for ad-hoc/naive/other extensions of the reporting process. In that way we don't constraint the implementation of the scheduling alg. to that information. what do you think? X On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote: > Hi all, > > In this thread, we will continue the discussion about Confirmation > message. Here is some background information. > > Context: e.g. > - node sends a report and want to know if the report is accepted., > - ME sends a action request and want to know if/when the action taken. > Options: > (1) Nothing > (2) Rely on transport mechanism (e.g. confirmable CoAP message) > (3) App-level ACK type > (4) Use different flow (i.e. action flow) > > IMHO, different control flow may have different requirement for > confirmation message. > (1) Action Flow, needs a App-level confirmation, like Succ/Fail > (2) Query Flow, automatically has the confirmation, i.e. the message > packet corresponding to a specific query. > (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer > option (1) and (3), i.e. the confirmation message is an option, but if a > confirmation message is needed, it should be App-level Ack, instead of > transport layer confirmation, which will give 6top more flexibility. > > What do you think? > > Thanks > Qin > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --047d7b2e3f063ac63004e5a6e92c Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hello, I guess that flows are getting defined and I starte= d to think on the contents of the messages on that flows. Not sure if this = is the right time or I am going way far..

According to th= e previous discussion I assume that the five flows are:

ME-6TOP - Query Flow
ME-6TOP - Action Flow

6TOP - ME - Report Flow
6TOP - ME - Event = Flow
6TOP - ME - Request BW Flow

I'd= like to start defining the content of the messages in the Report Flow:

The Report Flow: has to deal with the information that = a node knows and has to be sent to the ME so the ME can compute the schedul= e among others. Here I list =A0the information that we can know in a mote a= nd can be used at the ME to compute the schedule (complete please if I miss= something)

For each known neighbor:
=A0-ID
=A0= -AVG RSSI in a running window
=A0-Latest RSSI
=A0-Num T= X packets
=A0-Num ACK packets
=A0-Num RX packets
<= div>=A0-Last ASN when it heart about that neighbor=A0

Other fields
=A0-Num links in the Schedule to= that neighbor
=A0 =A0 -For each link PDR
=A0
=A0
Then we need to have some TLV like objects that can be used = for ad-hoc/naive/other extensions of the reporting process. In that way we = don't constraint the implementation of the scheduling alg. to that info= rmation.

what do you think?
X
<= div class=3D"gmail_extra">

On Fri, Aug 30= , 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote= :
Hi all,

= In this thread, we will continue the discussion about Confirmation message. He= re is some background information.

<= /span>
Context: e.g.
=A0 =A0 - node sends a report and want to know if the= report is accepted.,=A0
=A0 =A0 - ME sen= ds a action request and want to know if/when the action taken.
Options:
=A0 =A0(1= ) Nothing
=A0 =A0(2) Rely on transport mechanism (e.g. confirma= ble CoAP message)
=A0 =A0(3) App-level AC= K type
=A0 =A0(4) Use different flow (i.e. action flow)

IMHO, different control flow may have di= fferent requirement for confirmation message.
=A0 =A0 (1) Action Flow, needs a App-level confirmation, like Succ/F= ail
=A0 =A0 (2) Query Flow, automatically has the confirm= ation, i.e. the message packet corresponding to a specific query.
=A0 =A0 (3) Report Flow and Event Flow, option (1)-(3) are= OK, but I prefer option (1) and (3), i.e. the confirmation message is an o= ption, but if a confirmation message is needed, it should be App-level Ack,= instead of transport layer confirmation, which will give 6top more flexibi= lity.

What do you th= ink?

Thanks<= /div>
Qin
=A0 =A0=A0

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--047d7b2e3f063ac63004e5a6e92c-- From twatteyne@gmail.com Thu Sep 5 11:30:01 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E727821E80EF for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 11:30:00 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0 X-Spam-Level: X-Spam-Status: No, score=x tagged_above=-999 required=5 tests=[] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8nlj4JFPF3fe for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 11:30:00 -0700 (PDT) Received: from mail-pa0-x235.google.com (mail-pa0-x235.google.com [IPv6:2607:f8b0:400e:c03::235]) by ietfa.amsl.com (Postfix) with ESMTP id A1A9211E80EF for <6tsch@ietf.org>; Thu, 5 Sep 2013 11:29:59 -0700 (PDT) Received: by mail-pa0-f53.google.com with SMTP id lb1so2247297pab.40 for <6tsch@ietf.org>; Thu, 05 Sep 2013 11:29:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc:content-type; bh=HIK3gEKf655RgpUv82Y1uiv8ihgG4px23KM1xtm7L1s=; b=Pt41keJ+ECuSKUZ/PjM7gM1QmBJaEFV9MAScZ3T8Jo1A7HWayekjtARdusif353Z9Q Pnifw5e0dr7eCyvtFgJcTJVQ9KK5KMVU6TVZZwhIbgput1d8Iaadwb2GDz6fX4p9WYcc MT3NlV5mwae6VNr1Mr+1BoRPhIMjoFzLE9dqOY69gtPoibWE3PtoOcfCrXlVnkplBPdu Uq3N6CjtKB0U8XYKvApIDueFyrAgbkq/CJXMfBQzMgEISLci92mIvg1259T86XOTE9SA 8+SE6kKL/YwPQ3zDYMOamiMcS73oDUT3rVMS3Cd1NkLBUsglcpLvTNMGNQb2jk0HYYWG JGwg== X-Received: by 10.66.248.161 with SMTP id yn1mr11033619pac.0.1378405799312; Thu, 05 Sep 2013 11:29:59 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Thu, 5 Sep 2013 11:29:39 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Thu, 5 Sep 2013 11:29:39 -0700 X-Google-Sender-Auth: 734ysXxrzHS7TEVk6O1SqHNe-aQ Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/mixed; boundary=047d7b15b0430648d104e5a71ca3 Cc: "JP Vasseur \(jvasseur\)" Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 18:30:01 -0000 --047d7b15b0430648d104e5a71ca3 Content-Type: multipart/related; boundary=047d7b15b0430648cf04e5a71ca2 --047d7b15b0430648cf04e5a71ca2 Content-Type: multipart/alternative; boundary=047d7b15b0430648cc04e5a71ca1 --047d7b15b0430648cc04e5a71ca1 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Diego, all, Let's not get confused. IMHO, the goal is to mainly identify the interactions between the PCE, and the mesh and the Internet, to guide us in the choice of the different packets. I created the figure below so we have something clear to argue over. Comments/edits more than welcome. [image: Inline image 1] About your question, Diego, I believe that the request flow should contain a mechanism for the requester to query the state of its request, and for the PCE to notify the requester about the outcome. It the PCE cannot satisfy the request, that is an administrative issue rather than a networking issue. I believe that this is out of scope. Thomas On Thu, Sep 5, 2013 at 5:40 AM, Prof. Diego Dujovne < diego.dujovne@mail.udp.cl> wrote: > Dear All, > Then, we have two flows to update the track: > Schedule flow (6top to ME): An action flow to ask for a new cell/track > - Execution Confirm (Success/Failure) if requested > This means that the request was queued. > Action flow (ME to 6top): An action flow to announce the update of the > schedule - Execution Confirm (Success/Failure) > What happens if the queued request cannot be satisfied (e.g. energy > policy restriction)? > Comments? > > Diego Dujovne > > > > 2013/9/5 Pascal Thubert (pthubert) : > > Yes=85 > > > > > > > > And the aim should be to make sure that the PCE has queued the request = to > > build a track. > > > > That request may be served asynchronously, considering that the PCE > > sometimes needs to defragment / reoptimize multiple flows, and it may > stack > > some requests for a short while. > > > > When the PCE is finally ready, it computes the track, and pushes it > through > > an action flow; but I would consider that a different flow, not an > embedded > > flow for the reason above. > > > > > > > > Makes sense? > > > > > > > > Pascal > > > > > > > > From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] > > Sent: jeudi 5 septembre 2013 09:16 > > > > > > To: Pascal Thubert (pthubert); Qin Wang > > Cc: Thomas Watteyne; 6tsch@ietf.org > > Subject: RE: [6tsch] About the special type of event to ask PCE to > create a > > track > > > > > > > > It makes sense for me. Even though they are generated by different > entities, > > they are both addressed to the PCE, and they have the same final aim. > > > > Maria Rita > > > > > > > > From: Pascal Thubert (pthubert) [mailto:pthubert@cisco.com] > > Sent: Thursday, September 05, 2013 9:02 AM > > To: Maria Rita PALATTELLA; Qin Wang > > Cc: Thomas Watteyne; 6tsch@ietf.org > > Subject: RE: [6tsch] About the special type of event to ask PCE to > create a > > track > > > > > > > > Fine with me Maria Rita, > > > > > > > > But note that there is also a flow that fits the name =93schedule flow= =94 > that > > is stimulated by the Net mgt Entity in the admin console as opposed to > the > > mt entity in the device. > > > > Same thing, this creates a req to the PCE to install a track. Do we wan= t > to > > merge those 2 flows? =96 I think so. > > > > > > > > Cheers, > > > > > > > > Pascal > > > > > > > > From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] > > Sent: jeudi 5 septembre 2013 08:47 > > To: Pascal Thubert (pthubert); Qin Wang > > Cc: Thomas Watteyne; 6tsch@ietf.org > > Subject: RE: [6tsch] About the special type of event to ask PCE to > create a > > track > > > > > > > > I agree too. If we want to cut the name shorter, maybe we can just call > it =93 > > Schedule Flow=94 (removing the update). > > > > In the end, we know that this flow will happen when a node asks the PCE > to > > update its schedule, and add/remove cells/tracks. What do you think? > > > > Maria Rita > > > > > > > > From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf > Of > > Pascal Thubert (pthubert) > > Sent: Thursday, September 05, 2013 7:29 AM > > To: Qin Wang > > Cc: Thomas Watteyne; 6tsch@ietf.org > > Subject: Re: [6tsch] About the special type of event to ask PCE to > create a > > track > > > > > > > > +1 > > > > Pascal > > > > > > Le 5 sept. 2013 =E0 00:10, "Qin Wang" a =E9crit = : > > > > Thomas, > > > > > > > > I think "Flow" is a process to exchange messages for a given objective. > For > > example, action flow consists of a Action Request from ME to 6top, and = a > > Execution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update > > request" looks like one step of a process. I would like to suggest that > the > > 5th flow is called "Schedule update flow", consists of a "Schedule upda= te > > request" from node to PCE, and something like "Track/cell installation" > from > > PCE to node. > > > > > > > > Make sense? > > > > Qin > > > > > > > > On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> > > wrote: > > > > I would agree that a 5th flow makes sense, especially because it allows > us > > to use different transport mechanisms for the report flow (CoAP?) and > this > > new flows (CoAP now? maybe PCEP later?). > > > > > > > > Do what do we call this new flow? "Schedule update request" is a bit > long. > > > > > > > > Thomas > > > > > > > > On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang wrote: > > > > Hi Thomas, > > > > > > > > Thanks for your explanation. You are saying the request packet from nod= e > is > > generated by the upper layer of 6top, correct? > > > > > > > > If so, since the request packet is generated by upper layer of 6top, > instead > > of 6top internal events like alarm, I think it is reasonable to add the > 5th > > control flow. > > > > > > > > What do you think? > > > > > > > > Qin > > > > > > > > On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne > > wrote: > > > > Qin, > > > > > > > > Thanks for bringing that up. Allow me to answer in Pascal's place. We a= re > > talking about the format of the packets exchanged between the ME and th= e > > nodes. In the centralized case, these are application-level packets, i.= e. > > packet generated by an entity a couple of layer above 6top. That entity > > talks with the PCE over the network, and with 6top through the API > (internal > > to the node) as defined in > > http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4. > > > > > > > > If we agree on that, the question is whether the packet the node sends = to > > establish a new track is part of the event flow, or not. In both cases, > it > > would originate from this application-level entity, but possibly > transported > > in different ways. > > > > > > > > Thomas > > > > > > > > On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang wrote= : > > > > Hi Pascal, > > > > > > > > My understanding is that 6top is a passive role in dealing with > cell/track > > reservation. In another word, the 6top in a node can report its state, > > including neighbor table, cell usage, and other statistics information, > but > > can not make decision on if some cells/track should be added or removed= , > > which should be the responsibility of PCE in centralized case or upper > layer > > in distributed case. Thus, I can not see when the 5th flow will be used= . > Can > > you explain more? > > > > > > > > Thanks > > > > Qin > > > > > > > > On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) > > wrote: > > > > Dear all, > > > > We discussed at the call that the(PCEP?) request to ask for a track > > establishment could be seen as an event, or could be a new flow. > > At the call, I suggested that it could be a new, 5th flow. My arguments > are > > that this flow: > > - Probably yields different data format. The demand carries and points, > end > > to end latency and bandwidth. That's quite specific. > > - Probably yields a different flow. Events do not necessarily have a > > response. > > - Probably uses a different transport as well (PCEP vs. CoAP) > > > > What do you think? > > > > Pascal > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > > > > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > > > > > > > > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > -- > DIEGO DUJOVNE > Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones > Facultad de Ingenier=EDa UDP > www.ingenieria.udp.cl > (56 2) 676 8125 > --047d7b15b0430648cc04e5a71ca1 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Diego, all,

Let's not get confused.= IMHO, the goal is to mainly identify the interactions between the PCE, and= the mesh and the Internet, to guide us in the choice of the different pack= ets. I created the figure below so we have something clear to argue over. C= omments/edits more than welcome.

3D"Inline

About your = question, Diego, I believe that the request flow should contain a mechanism= for the requester to query the state of its request, and for the PCE to no= tify the requester about the outcome. It the PCE cannot satisfy the request= , that is an administrative issue rather than a networking issue. I believe= that this is out of scope.

Thomas


On Thu, Sep 5, 2013 at 5:40 AM, Prof. Diego Dujovne <diego.dujovne@mail.udp.cl> wrote:
Dear All,
=A0 =A0 =A0 =A0 =A0 =A0 Then, we have two flows to update the track:
Schedule flow (6top to ME): An action flow to ask for a new cell/track
- Execution Confirm (Success/Failure) if requested
This means that the request was queued.
Action flow (ME to 6top): An action flow to announce the update of the
schedule - Execution Confirm (Success/Failure)
What happens if the queued request cannot be satisfied (e.g. energy
policy restriction)?
Comments?

=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Diego Dujovne



2013/9/5 Pascal Thubert (pthubert) <pthubert@cisco.com>:
> Yes=85
>
>
>
> And the aim should be to make sure that the PCE has queued the request= to
> build a track.
>
> That request may be served asynchronously, considering that the PCE > sometimes needs to defragment / reoptimize multiple flows, and it may = stack
> some requests for a short while.
>
> When the PCE is finally ready, it computes the track, and pushes it th= rough
> an action flow; but I would consider that a different flow, not an emb= edded
> flow for the reason above.
>
>
>
> Makes sense?
>
>
>
> Pascal
>
>
>
> From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu]
> Sent: jeudi 5 septembre 2013 09:16
>
>
> To: Pascal Thubert (pthubert); Qin Wang
> Cc: Thomas Watteyne; 6tsch@ietf.org
> Subject: RE: [6tsch] About the special type of event to ask PCE to cre= ate a
> track
>
>
>
> It makes sense for me. Even though they are generated by different ent= ities,
> they are both addressed to the PCE, and they have the same final aim.<= br> >
> Maria Rita
>
>
>
> From: Pascal Thubert (pthubert) [mailto:pthubert@cisco.com]
> Sent: Thursday, September 05, 2013 9:02 AM
> To: Maria Rita PALATTELLA; Qin Wang
> Cc: Thomas Watteyne; 6tsch@ietf.org
> Subject: RE: [6tsch] About the special type of event to ask PCE to cre= ate a
> track
>
>
>
> Fine with me Maria Rita,
>
>
>
> But note that there is also a flow that fits the name =93schedule flow= =94 that
> is stimulated by the Net mgt Entity in the admin console as opposed to= the
> mt entity in the device.
>
> Same thing, this creates a req to the PCE to install a track. Do we wa= nt to
> merge those 2 flows? =96 I think so.
>
>
>
> Cheers,
>
>
>
> Pascal
>
>
>
> From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu]
> Sent: jeudi 5 septembre 2013 08:47
> To: Pascal Thubert (pthubert); Qin Wang
> Cc: Thomas Watteyne; 6tsch@ietf.org
> Subject: RE: [6tsch] About the special type of event to ask PCE to cre= ate a
> track
>
>
>
> I agree too. If we want to cut the name shorter, maybe we can just cal= l it =93
> Schedule Flow=94 (removing the update).
>
> In the end, we know that this flow will happen when a node asks the PC= E to
> update its schedule, and add/remove cells/tracks. What do you think? >
> Maria Rita
>
>
>
> From: 6tsc= h-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of
> Pascal Thubert (pthubert)
> Sent: Thursday, September 05, 2013 7:29 AM
> To: Qin Wang
> Cc: Thomas Watteyne; 6tsch@ietf.org
> Subject: Re: [6tsch] About the special type of event to ask PCE to cre= ate a
> track
>
>
>
> +1
>
> Pascal
>
>
> Le 5 sept. 2013 =E0 00:10, "Qin Wang" <qinwang@berkeley.edu> a =E9c= rit :
>
> Thomas,
>
>
>
> I think "Flow" is a process to exchange messages for a given= objective. For
> example, action flow consists of a Action Request from ME to 6top, and= a
> Execution Confirm (Succ/Fail) from 6top to ME. But, "Schedule upd= ate
> request" looks like one step of a process. I would like to sugges= t that the
> 5th flow is called "Schedule update flow", consists of a &qu= ot;Schedule update
> request" from node to PCE, and something like "Track/cell in= stallation" from
> PCE to node.
>
>
>
> Make sense?
>
> Qin
>
>
>
> On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu>
> wrote:
>
> I would agree that a 5th flow makes sense, especially because it allow= s us
> to use different transport mechanisms for the report flow (CoAP?) and = this
> new flows (CoAP now? maybe PCEP later?).
>
>
>
> Do what do we call this new flow? "Schedule update request" = is a bit long.
>
>
>
> Thomas
>
>
>
> On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang <qinwang@berkeley.edu> wrote:
>
> Hi Thomas,
>
>
>
> Thanks for your explanation. You are saying the request packet from no= de is
> generated by the upper layer of 6top, correct?
>
>
>
> If so, since the request packet is generated by upper layer of 6top, i= nstead
> of 6top internal events like alarm, I think it is reasonable to add th= e 5th
> control flow.
>
>
>
> What do you think?
>
>
>
> Qin
>
>
>
> On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne
> <wa= tteyne@eecs.berkeley.edu> wrote:
>
> Qin,
>
>
>
> Thanks for bringing that up. Allow me to answer in Pascal's place.= We are
> talking about the format of the packets exchanged between the ME and t= he
> nodes. In the centralized case, these are application-level packets, i= .e.
> packet generated by an entity a couple of layer above 6top. That entit= y
> talks with the PCE over the network, and with 6top through the API (in= ternal
> to the node) as defined in
> http://tools.ietf.org/html/draft-wang-6tsch-6top-00= #section-2.4.
>
>
>
> If we agree on that, the question is whether the packet the node sends= to
> establish a new track is part of the event flow, or not. In both cases= , it
> would originate from this application-level entity, but possibly trans= ported
> in different ways.
>
>
>
> Thomas
>
>
>
> On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang <qinwang@berkeley.edu> wrote:
>
> Hi Pascal,
>
>
>
> My understanding is that 6top is a passive role in dealing with cell/t= rack
> reservation. In another word, the 6top in a node can report its state,=
> including neighbor table, cell usage, and other statistics information= , but
> can not make decision on if some cells/track should be added or remove= d,
> which should be the responsibility of PCE in centralized case or upper= layer
> in distributed case. Thus, I can not see when the 5th flow will be use= d. Can
> you explain more?
>
>
>
> Thanks
>
> Qin
>
>
>
> On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert)
> <pthubert@c= isco.com> wrote:
>
> Dear all,
>
> We discussed at the call that the(PCEP?) request to ask for a track > establishment could be seen as an event, or could be a new flow.
> At the call, I suggested that it could be a new, 5th flow. My argument= s are
> that this flow:
> - Probably yields different data format. The demand carries and points= , end
> to end latency and bandwidth. That's quite specific.
> - Probably yields a different flow. Events do not necessarily have a > response.
> - Probably uses a different transport as well (PCEP vs. CoAP)
>
> What do you think?
>
> Pascal
> _______________________________________________
> 6tsch mailing list
> 6tsch@ietf.org=
> https://www.ietf.org/mailman/listinfo/6tsch
>
>
>
>
> _______________________________________________
> 6tsch mailing list
> 6tsch@ietf.org=
> https://www.ietf.org/mailman/listinfo/6tsch
>
>
> _______________________________________________
> 6tsch mailing list
> 6tsch@ietf.org=
> https://www.ietf.org/mailman/listinfo/6tsch
>
>
>
>
>
>
> _______________________________________________
> 6tsch mailing list
> 6tsch@ietf.org=
> https://www.ietf.org/mailman/listinfo/6tsch
>
>
>
> _______________________________________________
> 6tsch mailing list
> 6tsch@ietf.org=
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>
>
> _______________________________________________
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>



--
DIEGO DUJOVNE
Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP
www.ingenieria.u= dp.cl
(56 2) 676 8125

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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAA////////////////AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAD///////////////8AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAA= --047d7b15b0430648d104e5a71ca3-- From pthubert@cisco.com Thu Sep 5 11:37:05 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 029C611E80FD for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 11:37:05 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.203 X-Spam-Level: X-Spam-Status: No, score=-10.203 tagged_above=-999 required=5 tests=[AWL=-0.204, BAYES_00=-2.599, J_CHICKENPOX_34=0.6, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) 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X-IronPort-AV: E=Sophos;i="4.90,848,1371081600"; d="png'150?scan'150,208,150";a="256188606" Received: from rcdn-core2-3.cisco.com ([173.37.113.190]) by rcdn-iport-4.cisco.com with ESMTP; 05 Sep 2013 18:36:51 +0000 Received: from xhc-aln-x07.cisco.com (xhc-aln-x07.cisco.com [173.36.12.81]) by rcdn-core2-3.cisco.com (8.14.5/8.14.5) with ESMTP id r85IapPj011122 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 5 Sep 2013 18:36:51 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-aln-x07.cisco.com ([173.36.12.81]) with mapi id 14.02.0318.004; Thu, 5 Sep 2013 13:36:51 -0500 From: "Pascal Thubert (pthubert)" To: Thomas Watteyne Thread-Topic: [6tsch] About the special type of event to ask PCE to create a track Thread-Index: AQHOqmXhvNF3zWfNUUeZLJxljh9TZ5m3ePk2 Date: Thu, 5 Sep 2013 18:36:50 +0000 Message-ID: References: , In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: yes X-MS-TNEF-Correlator: Content-Type: multipart/mixed; boundary="_002_A1F395DCF48E42A9BB10385EFA5D8477ciscocom_" MIME-Version: 1.0 Cc: "6tsch@ietf.org" <6tsch@ietf.org>, "JP Vasseur \(jvasseur\)" Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 18:37:05 -0000 --_002_A1F395DCF48E42A9BB10385EFA5D8477ciscocom_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable +1 If the PCE cannot solve the problem I can hardly see how the mote could fix= it... Pascal Le 5 sept. 2013 =E0 20:30, "Thomas Watteyne" a= =E9crit : > Diego, all, >=20 > Let's not get confused. IMHO, the goal is to mainly identify the interact= ions between the PCE, and the mesh and the Internet, to guide us in the cho= ice of the different packets. I created the figure below so we have somethi= ng clear to argue over. Comments/edits more than welcome. >=20 > [Inline image 1] >=20 > About your question, Diego, I believe that the request flow should contai= n a mechanism for the requester to query the state of its request, and for = the PCE to notify the requester about the outcome. It the PCE cannot satisf= y the request, that is an administrative issue rather than a networking iss= ue. I believe that this is out of scope. >=20 > Thomas >=20 >=20 > On Thu, Sep 5, 2013 at 5:40 AM, Prof. Diego Dujovne > wrote: > Dear All, > Then, we have two flows to update the track: > Schedule flow (6top to ME): An action flow to ask for a new cell/track > - Execution Confirm (Success/Failure) if requested > This means that the request was queued. > Action flow (ME to 6top): An action flow to announce the update of the > schedule - Execution Confirm (Success/Failure) > What happens if the queued request cannot be satisfied (e.g. energy > policy restriction)? > Comments? >=20 > Diego Dujovne >=20 >=20 >=20 > 2013/9/5 Pascal Thubert (pthubert) >: >> Yes=85 >>=20 >>=20 >>=20 >> And the aim should be to make sure that the PCE has queued the request t= o >> build a track. >>=20 >> That request may be served asynchronously, considering that the PCE >> sometimes needs to defragment / reoptimize multiple flows, and it may st= ack >> some requests for a short while. >>=20 >> When the PCE is finally ready, it computes the track, and pushes it thro= ugh >> an action flow; but I would consider that a different flow, not an embed= ded >> flow for the reason above. >>=20 >>=20 >>=20 >> Makes sense? >>=20 >>=20 >>=20 >> Pascal >>=20 >>=20 >>=20 >> From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] >> Sent: jeudi 5 septembre 2013 09:16 >>=20 >>=20 >> To: Pascal Thubert (pthubert); Qin Wang >> Cc: Thomas Watteyne; 6tsch@ietf.org >> Subject: RE: [6tsch] About the special type of event to ask PCE to creat= e a >> track >>=20 >>=20 >>=20 >> It makes sense for me. Even though they are generated by different entit= ies, >> they are both addressed to the PCE, and they have the same final aim. >>=20 >> Maria Rita >>=20 >>=20 >>=20 >> From: Pascal Thubert (pthubert) [mailto:pthubert@cisco.com] >> Sent: Thursday, September 05, 2013 9:02 AM >> To: Maria Rita PALATTELLA; Qin Wang >> Cc: Thomas Watteyne; 6tsch@ietf.org >> Subject: RE: [6tsch] About the special type of event to ask PCE to creat= e a >> track >>=20 >>=20 >>=20 >> Fine with me Maria Rita, >>=20 >>=20 >>=20 >> But note that there is also a flow that fits the name =93schedule flow= =94 that >> is stimulated by the Net mgt Entity in the admin console as opposed to t= he >> mt entity in the device. >>=20 >> Same thing, this creates a req to the PCE to install a track. Do we want= to >> merge those 2 flows? =96 I think so. >>=20 >>=20 >>=20 >> Cheers, >>=20 >>=20 >>=20 >> Pascal >>=20 >>=20 >>=20 >> From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] >> Sent: jeudi 5 septembre 2013 08:47 >> To: Pascal Thubert (pthubert); Qin Wang >> Cc: Thomas Watteyne; 6tsch@ietf.org >> Subject: RE: [6tsch] About the special type of event to ask PCE to creat= e a >> track >>=20 >>=20 >>=20 >> I agree too. If we want to cut the name shorter, maybe we can just call = it =93 >> Schedule Flow=94 (removing the update). >>=20 >> In the end, we know that this flow will happen when a node asks the PCE = to >> update its schedule, and add/remove cells/tracks. What do you think? >>=20 >> Maria Rita >>=20 >>=20 >>=20 >> From: 6tsch-bounces@ietf.org [mailto:6tsc= h-bounces@ietf.org] On Behalf Of >> Pascal Thubert (pthubert) >> Sent: Thursday, September 05, 2013 7:29 AM >> To: Qin Wang >> Cc: Thomas Watteyne; 6tsch@ietf.org >> Subject: Re: [6tsch] About the special type of event to ask PCE to creat= e a >> track >>=20 >>=20 >>=20 >> +1 >>=20 >> Pascal >>=20 >>=20 >> Le 5 sept. 2013 =E0 00:10, "Qin Wang" > a =E9crit : >>=20 >> Thomas, >>=20 >>=20 >>=20 >> I think "Flow" is a process to exchange messages for a given objective. = For >> example, action flow consists of a Action Request from ME to 6top, and a >> Execution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update >> request" looks like one step of a process. I would like to suggest that = the >> 5th flow is called "Schedule update flow", consists of a "Schedule updat= e >> request" from node to PCE, and something like "Track/cell installation" = from >> PCE to node. >>=20 >>=20 >>=20 >> Make sense? >>=20 >> Qin >>=20 >>=20 >>=20 >> On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne > >> wrote: >>=20 >> I would agree that a 5th flow makes sense, especially because it allows = us >> to use different transport mechanisms for the report flow (CoAP?) and th= is >> new flows (CoAP now? maybe PCEP later?). >>=20 >>=20 >>=20 >> Do what do we call this new flow? "Schedule update request" is a bit lon= g. >>=20 >>=20 >>=20 >> Thomas >>=20 >>=20 >>=20 >> On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang > wrote: >>=20 >> Hi Thomas, >>=20 >>=20 >>=20 >> Thanks for your explanation. You are saying the request packet from node= is >> generated by the upper layer of 6top, correct? >>=20 >>=20 >>=20 >> If so, since the request packet is generated by upper layer of 6top, ins= tead >> of 6top internal events like alarm, I think it is reasonable to add the = 5th >> control flow. >>=20 >>=20 >>=20 >> What do you think? >>=20 >>=20 >>=20 >> Qin >>=20 >>=20 >>=20 >> On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne >> > wrote: >>=20 >> Qin, >>=20 >>=20 >>=20 >> Thanks for bringing that up. Allow me to answer in Pascal's place. We ar= e >> talking about the format of the packets exchanged between the ME and the >> nodes. In the centralized case, these are application-level packets, i.e= . >> packet generated by an entity a couple of layer above 6top. That entity >> talks with the PCE over the network, and with 6top through the API (inte= rnal >> to the node) as defined in >> http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4. >>=20 >>=20 >>=20 >> If we agree on that, the question is whether the packet the node sends t= o >> establish a new track is part of the event flow, or not. In both cases, = it >> would originate from this application-level entity, but possibly transpo= rted >> in different ways. >>=20 >>=20 >>=20 >> Thomas >>=20 >>=20 >>=20 >> On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang > wrote: >>=20 >> Hi Pascal, >>=20 >>=20 >>=20 >> My understanding is that 6top is a passive role in dealing with cell/tra= ck >> reservation. In another word, the 6top in a node can report its state, >> including neighbor table, cell usage, and other statistics information, = but >> can not make decision on if some cells/track should be added or removed, >> which should be the responsibility of PCE in centralized case or upper l= ayer >> in distributed case. Thus, I can not see when the 5th flow will be used.= Can >> you explain more? >>=20 >>=20 >>=20 >> Thanks >>=20 >> Qin >>=20 >>=20 >>=20 >> On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) >> > wrote: >>=20 >> Dear all, >>=20 >> We discussed at the call that the(PCEP?) request to ask for a track >> establishment could be seen as an event, or could be a new flow. >> At the call, I suggested that it could be a new, 5th flow. My arguments = are >> that this flow: >> - Probably yields different data format. The demand carries and points, = end >> to end latency and bandwidth. That's quite specific. >> - Probably yields a different flow. Events do not necessarily have a >> response. >> - Probably uses a different transport as well (PCEP vs. CoAP) >>=20 >> What do you think? >>=20 >> Pascal >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >>=20 >>=20 >>=20 >>=20 >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >>=20 >>=20 >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >>=20 >>=20 >>=20 >>=20 >>=20 >>=20 >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >>=20 >>=20 >>=20 >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >>=20 >>=20 >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >=20 >=20 >=20 > -- > DIEGO DUJOVNE > Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones > Facultad de Ingenier=EDa UDP > www.ingenieria.udp.cl > (56 2) 676 8125 >=20 > <6tisch_flows.png> > <6tisch_flows.ppt> > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch --_002_A1F395DCF48E42A9BB10385EFA5D8477ciscocom_ Content-Type: image/png; name="6tisch_flows.png" Content-Description: 6tisch_flows.png Content-Disposition: attachment; filename="6tisch_flows.png"; size=135386; creation-date="Thu, 05 Sep 2013 18:30:20 GMT"; modification-date="Thu, 05 Sep 2013 18:30:20 GMT" Content-ID: Content-Transfer-Encoding: base64 iVBORw0KGgoAAAANSUhEUgAAA8AAAALQCAYAAABfdxm0AAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAO xAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAP+QSURBVHja 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X-Spam-Status: No, score=-1.876 tagged_above=-999 required=5 tests=[AWL=0.101, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id kt1U3Mt6rCJQ for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 11:41:36 -0700 (PDT) Received: from mail-pa0-x232.google.com (mail-pa0-x232.google.com [IPv6:2607:f8b0:400e:c03::232]) by ietfa.amsl.com (Postfix) with ESMTP id 78E7F11E80FB for <6tsch@ietf.org>; Thu, 5 Sep 2013 11:41:36 -0700 (PDT) Received: by mail-pa0-f50.google.com with SMTP id fb10so2293722pad.9 for <6tsch@ietf.org>; Thu, 05 Sep 2013 11:41:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=QXNibCiUXvqX9TytekrvRIWegz8SNipfs00YNCJhKso=; b=yP8wfXnaQuodF5SAFAweUOo8DRLOhjC/nH0Byl0Qe6Zns7xBn+UYf1DUcUeW1SToxE KYMmw0AeOI2g9dflaNgV1v8tft7ycxIawww1ucvCLMzvqRHiGoWKa5hkDl+XxzZqxfLk tTGQLIsDzuw6rHchpi8BodUigc5qTgfghuKQNtErzOc5QeznFqHGAue3LT0nRe/nXfxA k0xMKC4MzlVqCgwQjXr6X9JGazDsU3Q5NG3SebY2hYSB193s9f/q68XiojhswnnulSst AsTffumCXIwmoJs3BDG8tw3c+K+ANLBviURTpZcOY6ORAHYc2rNoVAMMrmyP8pBad/sQ tYMw== X-Received: by 10.68.98.101 with SMTP id eh5mr10777212pbb.65.1378406496189; Thu, 05 Sep 2013 11:41:36 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Thu, 5 Sep 2013 11:41:16 -0700 (PDT) From: Thomas Watteyne Date: Thu, 5 Sep 2013 11:41:16 -0700 X-Google-Sender-Auth: qrUSK2slteRWOdNfx7VtD0GPQ4c Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b6dd1008fc7a104e5a74556 Subject: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 18:41:37 -0000 --047d7b6dd1008fc7a104e5a74556 Content-Type: text/plain; charset=ISO-8859-1 *[renamed thread]* Xavi, A few thoughts: - the counters (numTx, etc) will only be present for neighbors the node has communicate with, so they should be optional in the packet. - you have focused on the topological information (which I think is the right one). It might be useful to gather other data related to synchronization or queuing. - I couldn't agree more with your suggestion to make it extensible. This does mean that we will need to state somewhere that a device need to ignore silently fields it does not understand. Thomas On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < xvilajosana@eecs.berkeley.edu> wrote: > Hello, I guess that flows are getting defined and I started to think on > the contents of the messages on that flows. Not sure if this is the right > time or I am going way far.. > > According to the previous discussion I assume that the five flows are: > > ME-6TOP - Query Flow > ME-6TOP - Action Flow > > 6TOP - ME - Report Flow > 6TOP - ME - Event Flow > 6TOP - ME - Request BW Flow > > I'd like to start defining the content of the messages in the Report Flow: > > The Report Flow: has to deal with the information that a node knows and > has to be sent to the ME so the ME can compute the schedule among others. > Here I list the information that we can know in a mote and can be used at > the ME to compute the schedule (complete please if I miss something) > > For each known neighbor: > -ID > -AVG RSSI in a running window > -Latest RSSI > -Num TX packets > -Num ACK packets > -Num RX packets > -Last ASN when it heart about that neighbor > > Other fields > -Num links in the Schedule to that neighbor > -For each link PDR > > > Then we need to have some TLV like objects that can be used for > ad-hoc/naive/other extensions of the reporting process. In that way we > don't constraint the implementation of the scheduling alg. to that > information. > > what do you think? > X > > > On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote: > >> Hi all, >> >> In this thread, we will continue the discussion about Confirmation >> message. Here is some background information. >> >> Context: e.g. >> - node sends a report and want to know if the report is accepted., >> - ME sends a action request and want to know if/when the action taken. >> Options: >> (1) Nothing >> (2) Rely on transport mechanism (e.g. confirmable CoAP message) >> (3) App-level ACK type >> (4) Use different flow (i.e. action flow) >> >> IMHO, different control flow may have different requirement for >> confirmation message. >> (1) Action Flow, needs a App-level confirmation, like Succ/Fail >> (2) Query Flow, automatically has the confirmation, i.e. the message >> packet corresponding to a specific query. >> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer >> option (1) and (3), i.e. the confirmation message is an option, but if a >> confirmation message is needed, it should be App-level Ack, instead of >> transport layer confirmation, which will give 6top more flexibility. >> >> What do you think? >> >> Thanks >> Qin >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --047d7b6dd1008fc7a104e5a74556 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
[renamed thread]

Xavi,

A few = thoughts:
-= the counters (numTx, etc) will only be present for neighbors the node has = communicate with, so they should be optional in the packet.
- you have focus= ed on the topological information (which I think is the right one). It migh= t be useful to gather other data related to synchronization or queuing.
- I couldn't= agree more with your suggestion to make it extensible. This does mean that= we will need to state somewhere that a device need to ignore silently fiel= ds it does not understand.

Thomas

On Thu, Sep 5, 2013 at 11:1= 5 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu= > wrote:
Hello, I guess that flows a= re getting defined and I started to think on the contents of the messages o= n that flows. Not sure if this is the right time or I am going way far..
According to the previous discussion I assume that the five f= lows are:

ME-6TOP - Query Flow
ME-6TOP - Action Flow

6TOP - ME - Report Flow
6TOP - ME - Event = Flow
6TOP - ME - Request BW Flow

I'd= like to start defining the content of the messages in the Report Flow:

The Report Flow: has to deal with the information that = a node knows and has to be sent to the ME so the ME can compute the schedul= e among others. Here I list =A0the information that we can know in a mote a= nd can be used at the ME to compute the schedule (complete please if I miss= something)

For each known neighbor:
=A0-ID
=A0= -AVG RSSI in a running window
=A0-Latest RSSI
=A0-Num T= X packets
=A0-Num ACK packets
=A0-Num RX packets
<= div>=A0-Last ASN when it heart about that neighbor=A0

Other fields
=A0-Num links in the Schedule to= that neighbor
=A0 =A0 -For each link PDR
=A0
=A0
Then we need to have some TLV like objects that can be used = for ad-hoc/naive/other extensions of the reporting process. In that way we = don't constraint the implementation of the scheduling alg. to that info= rmation.

what do you think?
X
<= div class=3D"gmail_extra">

On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <<= a href=3D"mailto:qinwang@berkeley.edu" target=3D"_blank">qinwang@berkeley.e= du> wrote:
Hi all,

In this thread, we will continue the discussion about Confirmation message. He= re is some background information.

<= /span>
Context: e.g.
=A0 =A0 - node sends a report and want to know if the= report is accepted.,=A0
=A0 =A0 - ME sen= ds a action request and want to know if/when the action taken.
Options:
=A0 =A0(1= ) Nothing
=A0 =A0(2) Rely on transport mechanism (e.g. confirma= ble CoAP message)
=A0 =A0(3) App-level AC= K type
=A0 =A0(4) Use different flow (i.e. action flow)

IMHO, different control flow may have di= fferent requirement for confirmation message.
=A0 =A0 (1) Action Flow, needs a App-level confirmation, like Succ/F= ail
=A0 =A0 (2) Query Flow, automatically has the confirm= ation, i.e. the message packet corresponding to a specific query.
=A0 =A0 (3) Report Flow and Event Flow, option (1)-(3) are= OK, but I prefer option (1) and (3), i.e. the confirmation message is an o= ption, but if a confirmation message is needed, it should be App-level Ack,= instead of transport layer confirmation, which will give 6top more flexibi= lity.

What do you th= ink?

Thanks<= /div>
Qin
=A0 =A0=A0

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--047d7b6dd1008fc7a104e5a74556-- From diego.dujovne@mail.udp.cl Thu Sep 5 12:14:30 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3A9EA21F9FBE for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 12:14:30 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.477 X-Spam-Level: X-Spam-Status: No, score=-2.477 tagged_above=-999 required=5 tests=[AWL=-0.100, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, J_CHICKENPOX_34=0.6, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PZD7H6EnxajL for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 12:14:26 -0700 (PDT) Received: from mail-oa0-f42.google.com (mail-oa0-f42.google.com [209.85.219.42]) by ietfa.amsl.com (Postfix) with ESMTP id 2754D21F9F26 for <6tsch@ietf.org>; Thu, 5 Sep 2013 12:14:25 -0700 (PDT) Received: by mail-oa0-f42.google.com with SMTP id n12so2853074oag.29 for <6tsch@ietf.org>; Thu, 05 Sep 2013 12:14:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=W5pIsGhtiZ5a1+PoOvlkd2ovUDp0Aed/SbwUa+xdYCg=; b=XtzTxdIdKMy9clSmoDrmzDDCuKpgWVxJWdifn9/iGvLwE6+N+ipwlZ9LJ28EU6Ma1S cnQPq+q3uvgaar3LDQZk4Rz40wI2A7qALQvYqOsV2Ny47vY2wQuo/ci07A3Z95b0YRSS gP61UTM0eV1xLIUFecS+VWW5FZko0xA46wieyauqvguMuoV2M7+n7mwgFNnKvYG0rqV6 IbYCoNmLRp/qikOa0mw82pDYT3BTnfkuzchMqHeV2eV+dclcDzixKMSqS6DSmF+TVLoJ we9tPr/sdJD6Jbg5HyNcJZgIJ1NpKc/VyETLana4oYnvRd25qbXDyj6DLjsxv/JJYc4H T17g== X-Gm-Message-State: ALoCoQnCPXH6xMkKWryiNsAgTdVg9Xy0nPG78d1Pi9vGmlfzMi8nlBscd9jSSynSyUFFhFrL9Ykq MIME-Version: 1.0 X-Received: by 10.60.120.69 with SMTP id la5mr1510163oeb.86.1378408465472; Thu, 05 Sep 2013 12:14:25 -0700 (PDT) Received: by 10.182.199.68 with HTTP; Thu, 5 Sep 2013 12:14:25 -0700 (PDT) In-Reply-To: References: Date: Thu, 5 Sep 2013 15:14:25 -0400 Message-ID: From: "Prof. Diego Dujovne" To: "Pascal Thubert (pthubert)" Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org>, "JP Vasseur \(jvasseur\)" Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 19:14:30 -0000 Pascal, I was not looking for the node to fix it, just looking to understand how smart 6top should be, or which entity should provide an answer instead. Thanks, Diego 2013/9/5 Pascal Thubert (pthubert) : > +1 > > If the PCE cannot solve the problem I can hardly see how the mote could f= ix it... > > Pascal > > Le 5 sept. 2013 =E0 20:30, "Thomas Watteyne" = a =E9crit : > >> Diego, all, >> >> Let's not get confused. IMHO, the goal is to mainly identify the interac= tions between the PCE, and the mesh and the Internet, to guide us in the ch= oice of the different packets. I created the figure below so we have someth= ing clear to argue over. Comments/edits more than welcome. >> >> [Inline image 1] >> >> About your question, Diego, I believe that the request flow should conta= in a mechanism for the requester to query the state of its request, and for= the PCE to notify the requester about the outcome. It the PCE cannot satis= fy the request, that is an administrative issue rather than a networking is= sue. I believe that this is out of scope. >> >> Thomas >> >> >> On Thu, Sep 5, 2013 at 5:40 AM, Prof. Diego Dujovne > wrote: >> Dear All, >> Then, we have two flows to update the track: >> Schedule flow (6top to ME): An action flow to ask for a new cell/track >> - Execution Confirm (Success/Failure) if requested >> This means that the request was queued. >> Action flow (ME to 6top): An action flow to announce the update of the >> schedule - Execution Confirm (Success/Failure) >> What happens if the queued request cannot be satisfied (e.g. energy >> policy restriction)? >> Comments? >> >> Diego Dujovne >> >> >> >> 2013/9/5 Pascal Thubert (pthubert) >: >>> Yes=85 >>> >>> >>> >>> And the aim should be to make sure that the PCE has queued the request = to >>> build a track. >>> >>> That request may be served asynchronously, considering that the PCE >>> sometimes needs to defragment / reoptimize multiple flows, and it may s= tack >>> some requests for a short while. >>> >>> When the PCE is finally ready, it computes the track, and pushes it thr= ough >>> an action flow; but I would consider that a different flow, not an embe= dded >>> flow for the reason above. >>> >>> >>> >>> Makes sense? >>> >>> >>> >>> Pascal >>> >>> >>> >>> From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] >>> Sent: jeudi 5 septembre 2013 09:16 >>> >>> >>> To: Pascal Thubert (pthubert); Qin Wang >>> Cc: Thomas Watteyne; 6tsch@ietf.org >>> Subject: RE: [6tsch] About the special type of event to ask PCE to crea= te a >>> track >>> >>> >>> >>> It makes sense for me. Even though they are generated by different enti= ties, >>> they are both addressed to the PCE, and they have the same final aim. >>> >>> Maria Rita >>> >>> >>> >>> From: Pascal Thubert (pthubert) [mailto:pthubert@cisco.com] >>> Sent: Thursday, September 05, 2013 9:02 AM >>> To: Maria Rita PALATTELLA; Qin Wang >>> Cc: Thomas Watteyne; 6tsch@ietf.org >>> Subject: RE: [6tsch] About the special type of event to ask PCE to crea= te a >>> track >>> >>> >>> >>> Fine with me Maria Rita, >>> >>> >>> >>> But note that there is also a flow that fits the name =93schedule flow= =94 that >>> is stimulated by the Net mgt Entity in the admin console as opposed to = the >>> mt entity in the device. >>> >>> Same thing, this creates a req to the PCE to install a track. Do we wan= t to >>> merge those 2 flows? =96 I think so. >>> >>> >>> >>> Cheers, >>> >>> >>> >>> Pascal >>> >>> >>> >>> From: Maria Rita PALATTELLA [mailto:maria-rita.palattella@uni.lu] >>> Sent: jeudi 5 septembre 2013 08:47 >>> To: Pascal Thubert (pthubert); Qin Wang >>> Cc: Thomas Watteyne; 6tsch@ietf.org >>> Subject: RE: [6tsch] About the special type of event to ask PCE to crea= te a >>> track >>> >>> >>> >>> I agree too. If we want to cut the name shorter, maybe we can just call= it =93 >>> Schedule Flow=94 (removing the update). >>> >>> In the end, we know that this flow will happen when a node asks the PCE= to >>> update its schedule, and add/remove cells/tracks. What do you think? >>> >>> Maria Rita >>> >>> >>> >>> From: 6tsch-bounces@ietf.org [mailto:6ts= ch-bounces@ietf.org] On Behalf Of >>> Pascal Thubert (pthubert) >>> Sent: Thursday, September 05, 2013 7:29 AM >>> To: Qin Wang >>> Cc: Thomas Watteyne; 6tsch@ietf.org >>> Subject: Re: [6tsch] About the special type of event to ask PCE to crea= te a >>> track >>> >>> >>> >>> +1 >>> >>> Pascal >>> >>> >>> Le 5 sept. 2013 =E0 00:10, "Qin Wang" > a =E9crit : >>> >>> Thomas, >>> >>> >>> >>> I think "Flow" is a process to exchange messages for a given objective.= For >>> example, action flow consists of a Action Request from ME to 6top, and = a >>> Execution Confirm (Succ/Fail) from 6top to ME. But, "Schedule update >>> request" looks like one step of a process. I would like to suggest that= the >>> 5th flow is called "Schedule update flow", consists of a "Schedule upda= te >>> request" from node to PCE, and something like "Track/cell installation"= from >>> PCE to node. >>> >>> >>> >>> Make sense? >>> >>> Qin >>> >>> >>> >>> On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne > >>> wrote: >>> >>> I would agree that a 5th flow makes sense, especially because it allows= us >>> to use different transport mechanisms for the report flow (CoAP?) and t= his >>> new flows (CoAP now? maybe PCEP later?). >>> >>> >>> >>> Do what do we call this new flow? "Schedule update request" is a bit lo= ng. >>> >>> >>> >>> Thomas >>> >>> >>> >>> On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang > wrote: >>> >>> Hi Thomas, >>> >>> >>> >>> Thanks for your explanation. You are saying the request packet from nod= e is >>> generated by the upper layer of 6top, correct? >>> >>> >>> >>> If so, since the request packet is generated by upper layer of 6top, in= stead >>> of 6top internal events like alarm, I think it is reasonable to add the= 5th >>> control flow. >>> >>> >>> >>> What do you think? >>> >>> >>> >>> Qin >>> >>> >>> >>> On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne >>> > wrote: >>> >>> Qin, >>> >>> >>> >>> Thanks for bringing that up. Allow me to answer in Pascal's place. We a= re >>> talking about the format of the packets exchanged between the ME and th= e >>> nodes. In the centralized case, these are application-level packets, i.= e. >>> packet generated by an entity a couple of layer above 6top. That entity >>> talks with the PCE over the network, and with 6top through the API (int= ernal >>> to the node) as defined in >>> http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4. >>> >>> >>> >>> If we agree on that, the question is whether the packet the node sends = to >>> establish a new track is part of the event flow, or not. In both cases,= it >>> would originate from this application-level entity, but possibly transp= orted >>> in different ways. >>> >>> >>> >>> Thomas >>> >>> >>> >>> On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang > wrote: >>> >>> Hi Pascal, >>> >>> >>> >>> My understanding is that 6top is a passive role in dealing with cell/tr= ack >>> reservation. In another word, the 6top in a node can report its state, >>> including neighbor table, cell usage, and other statistics information,= but >>> can not make decision on if some cells/track should be added or removed= , >>> which should be the responsibility of PCE in centralized case or upper = layer >>> in distributed case. Thus, I can not see when the 5th flow will be used= . Can >>> you explain more? >>> >>> >>> >>> Thanks >>> >>> Qin >>> >>> >>> >>> On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert) >>> > wrote: >>> >>> Dear all, >>> >>> We discussed at the call that the(PCEP?) request to ask for a track >>> establishment could be seen as an event, or could be a new flow. >>> At the call, I suggested that it could be a new, 5th flow. My arguments= are >>> that this flow: >>> - Probably yields different data format. The demand carries and points,= end >>> to end latency and bandwidth. That's quite specific. >>> - Probably yields a different flow. Events do not necessarily have a >>> response. >>> - Probably uses a different transport as well (PCEP vs. CoAP) >>> >>> What do you think? >>> >>> Pascal >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >>> >>> >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >> >> >> >> -- >> DIEGO DUJOVNE >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicacione= s >> Facultad de Ingenier=EDa UDP >> www.ingenieria.udp.cl >> (56 2) 676 8125 >> >> <6tisch_flows.png> >> <6tisch_flows.ppt> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > --=20 DIEGO DUJOVNE Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl (56 2) 676 8125 From diego.dujovne@mail.udp.cl Thu Sep 5 12:33:29 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4C3B021F9E0B for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 12:33:29 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.752 X-Spam-Level: X-Spam-Status: No, score=-2.752 tagged_above=-999 required=5 tests=[AWL=0.225, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bwa8JnpvrLmz for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 12:33:25 -0700 (PDT) Received: from mail-ob0-f177.google.com (mail-ob0-f177.google.com [209.85.214.177]) by ietfa.amsl.com (Postfix) with ESMTP id 0E49321F9DB0 for <6tsch@ietf.org>; Thu, 5 Sep 2013 12:33:24 -0700 (PDT) Received: by mail-ob0-f177.google.com with SMTP id f8so2466075obp.8 for <6tsch@ietf.org>; Thu, 05 Sep 2013 12:33:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=RgJmS0ttom+4bne9+F04DjTH+eCiA2WGxzHf2rgpE/Q=; b=ZsmGfMvdoR001ddpy84P4Rstsd/O5v9fmeB28GmJhsRrMm2ocHHdAavbokQpIIb31+ eOBbUMYWygOIID7Cqe/GDbbFI3U1Boc4z4C2H+PXEFZv1abbydfZFQpzRc7S0OzgY3EW VUiEptnctBhQF6/KfjMxwaHC0AGhwG2V/0CCvQ+cfJr8BrzWQy/DTbmHb1nNLTQaaQzD oqffnX5smqhT+HHSyBhZyl+YCVjyTo+3gQ27DcXyejmpt3CaFId5SvwVsM327CNyvyh1 G/9c1ebPB1vv0WQLK3+77ietfTP6I4Yu1JPEW74nawbaGnVunh0dFTE3ha3uMgpO9gd2 AuZQ== X-Gm-Message-State: ALoCoQnJWvvfsWZKChGAprxPd8aE0ducFC8N/MrWe1h7nGHfxs3fhLX1nmasEkv3muHyvuzbIumh MIME-Version: 1.0 X-Received: by 10.182.70.102 with SMTP id l6mr7719129obu.78.1378409604310; Thu, 05 Sep 2013 12:33:24 -0700 (PDT) Received: by 10.182.199.68 with HTTP; Thu, 5 Sep 2013 12:33:24 -0700 (PDT) In-Reply-To: References: Date: Thu, 5 Sep 2013 15:33:24 -0400 Message-ID: From: "Prof. Diego Dujovne" To: Xavier Vilajosana Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: "6tsch@ietf.org" <6tsch@ietf.org>, Qin Wang Subject: Re: [6tsch] (no subject) X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 19:33:29 -0000 Xavi, I would add the LQI measurement too for each neighbor (AVG+Latest). Regards, Diego Dujovne 2013/9/5 Xavier Vilajosana Guillen : > Hello, I guess that flows are getting defined and I started to think on t= he > contents of the messages on that flows. Not sure if this is the right tim= e > or I am going way far.. > > According to the previous discussion I assume that the five flows are: > > ME-6TOP - Query Flow > ME-6TOP - Action Flow > > 6TOP - ME - Report Flow > 6TOP - ME - Event Flow > 6TOP - ME - Request BW Flow > > I'd like to start defining the content of the messages in the Report Flow= : > > The Report Flow: has to deal with the information that a node knows and h= as > to be sent to the ME so the ME can compute the schedule among others. Her= e I > list the information that we can know in a mote and can be used at the M= E > to compute the schedule (complete please if I miss something) > > For each known neighbor: > -ID > -AVG RSSI in a running window > -Latest RSSI > -Num TX packets > -Num ACK packets > -Num RX packets > -Last ASN when it heart about that neighbor > > Other fields > -Num links in the Schedule to that neighbor > -For each link PDR > > > Then we need to have some TLV like objects that can be used for > ad-hoc/naive/other extensions of the reporting process. In that way we do= n't > constraint the implementation of the scheduling alg. to that information. > > what do you think? > X > > > On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote: >> >> Hi all, >> >> In this thread, we will continue the discussion about Confirmation >> message. Here is some background information. >> >> Context: e.g. >> - node sends a report and want to know if the report is accepted., >> - ME sends a action request and want to know if/when the action take= n. >> Options: >> (1) Nothing >> (2) Rely on transport mechanism (e.g. confirmable CoAP message) >> (3) App-level ACK type >> (4) Use different flow (i.e. action flow) >> >> IMHO, different control flow may have different requirement for >> confirmation message. >> (1) Action Flow, needs a App-level confirmation, like Succ/Fail >> (2) Query Flow, automatically has the confirmation, i.e. the message >> packet corresponding to a specific query. >> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer >> option (1) and (3), i.e. the confirmation message is an option, but if a >> confirmation message is needed, it should be App-level Ack, instead of >> transport layer confirmation, which will give 6top more flexibility. >> >> What do you think? >> >> Thanks >> Qin >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > --=20 DIEGO DUJOVNE Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl (56 2) 676 8125 From xvilajosana@berkeley.edu Thu Sep 5 12:47:41 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1714511E824A for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 12:47:41 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.728 X-Spam-Level: X-Spam-Status: No, score=-2.728 tagged_above=-999 required=5 tests=[AWL=0.248, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id r189NihRaCXH for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 12:47:36 -0700 (PDT) Received: from mail-pb0-f46.google.com (mail-pb0-f46.google.com [209.85.160.46]) by ietfa.amsl.com (Postfix) with ESMTP id AE88811E8200 for <6tsch@ietf.org>; Thu, 5 Sep 2013 12:47:36 -0700 (PDT) Received: by mail-pb0-f46.google.com with SMTP id rq2so2240427pbb.33 for <6tsch@ietf.org>; Thu, 05 Sep 2013 12:47:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=p6jY4P7UyM3u4I80yr8O4RFeJNtgBGNVs9ZsOyyM2yc=; b=U7ZDRWF3xDWRUAaElkLXSm8lbz6OAMjYLv71/+Yp6oNjsx9rEnTUHSSMM8Qe6aEdJR vuJstgx4DNE5v+AlpGlAh4pcQqBrk+Ut0TfKB4FUC7WJbIHYH8CMGeNg6stZCZaN9FIj U8jHHBzKs+/xSQDr7l2Cdd0eva8mC3tISzcR6RDutWRgaJDFCWcOYoQyRYD79ujWUlil cvEgmVkIErT6HdP88g6caoKC3RSBH3Typ/TSyby6Z83Xyh3IzlGkm2TnumtUfVxalxyp l/LgabY1ZFDPExLd9mCjehPPPUssdhIVnsZQvWnYTZFe9oIRo1fX3fTdY8udS9B0NnLV VNCQ== X-Gm-Message-State: ALoCoQkuiDWRw87b/pqfr+twzW8DFRcHzMEl0rWmXWDcb7gKPXzLHqvTumSnzRmsYsU6BMcmQaHJ MIME-Version: 1.0 X-Received: by 10.67.2.33 with SMTP id bl1mr7351912pad.78.1378410456355; Thu, 05 Sep 2013 12:47:36 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Thu, 5 Sep 2013 12:47:36 -0700 (PDT) In-Reply-To: References: Date: Thu, 5 Sep 2013 12:47:36 -0700 Message-ID: From: Xavier Vilajosana Guillen To: Thomas Watteyne Content-Type: multipart/alternative; boundary=047d7b1121bf9b316e04e5a831ef Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 19:47:42 -0000 --047d7b1121bf9b316e04e5a831ef Content-Type: text/plain; charset=ISO-8859-1 Hi Thomas, Diego, I agree that LQI should be there as well. I update here the list with Thomas suggestions. For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -AVG LQI in a running window -Latest LQI -Num TX packets (option in case there is communication with that neighbor) -Num ACK packets (option in case there is communication with that neighbor) -Num RX packets (option in case there is communication with that neighbor) -Last ASN when it heart about that neighbor Other fields -Num links in the Schedule to that neighbor -For each link PDR -For each Queue: - Avg Queue length in a running window - Max Queue length in a running window (peak) - Current Queue length (?) -Time source parent -ID -Avg clock drift (correction done) in a running window -Latest clock correction -Parent changes (counter of how many times I changed my time source parent) -Option Flag (weather there are optional TLV fields) +(TLV objects)* Hope this makes sense. cheers! Xavi On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne wrote: > *[renamed thread]* > > Xavi, > > A few thoughts: > - the counters (numTx, etc) will only be present for neighbors the node > has communicate with, so they should be optional in the packet. > - you have focused on the topological information (which I think is the > right one). It might be useful to gather other data related to > synchronization or queuing. > - I couldn't agree more with your suggestion to make it extensible. This > does mean that we will need to state somewhere that a device need to ignore > silently fields it does not understand. > > Thomas > > On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote: > >> Hello, I guess that flows are getting defined and I started to think on >> the contents of the messages on that flows. Not sure if this is the right >> time or I am going way far.. >> >> According to the previous discussion I assume that the five flows are: >> >> ME-6TOP - Query Flow >> ME-6TOP - Action Flow >> >> 6TOP - ME - Report Flow >> 6TOP - ME - Event Flow >> 6TOP - ME - Request BW Flow >> >> I'd like to start defining the content of the messages in the Report Flow: >> >> The Report Flow: has to deal with the information that a node knows and >> has to be sent to the ME so the ME can compute the schedule among others. >> Here I list the information that we can know in a mote and can be used at >> the ME to compute the schedule (complete please if I miss something) >> >> For each known neighbor: >> -ID >> -AVG RSSI in a running window >> -Latest RSSI >> -Num TX packets >> -Num ACK packets >> -Num RX packets >> -Last ASN when it heart about that neighbor >> >> Other fields >> -Num links in the Schedule to that neighbor >> -For each link PDR >> >> >> Then we need to have some TLV like objects that can be used for >> ad-hoc/naive/other extensions of the reporting process. In that way we >> don't constraint the implementation of the scheduling alg. to that >> information. >> >> what do you think? >> X >> >> >> On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote: >> >>> Hi all, >>> >>> In this thread, we will continue the discussion about Confirmation >>> message. Here is some background information. >>> >>> Context: e.g. >>> - node sends a report and want to know if the report is accepted., >>> - ME sends a action request and want to know if/when the action >>> taken. >>> Options: >>> (1) Nothing >>> (2) Rely on transport mechanism (e.g. confirmable CoAP message) >>> (3) App-level ACK type >>> (4) Use different flow (i.e. action flow) >>> >>> IMHO, different control flow may have different requirement for >>> confirmation message. >>> (1) Action Flow, needs a App-level confirmation, like Succ/Fail >>> (2) Query Flow, automatically has the confirmation, i.e. the message >>> packet corresponding to a specific query. >>> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I >>> prefer option (1) and (3), i.e. the confirmation message is an option, but >>> if a confirmation message is needed, it should be App-level Ack, instead of >>> transport layer confirmation, which will give 6top more flexibility. >>> >>> What do you think? >>> >>> Thanks >>> Qin >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --047d7b1121bf9b316e04e5a831ef Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hi Thomas, Diego,

I agree that LQI shou= ld be there as well. I update here the list with Thomas suggestions.=A0

For each known neighbor:
=A0-ID
=A0-AVG RSSI in a running window<= /div>
= =A0-Latest RSSI
=A0-AVG LQI in a running window
=A0-Latest LQI
=A0-Num TX packets (option in case there is communicati= on with that neighbor)
=A0-Num ACK packets (option in case there is communication with that neighb= or)
=A0-Num RX packets (option in case there is communication with tha= t neighbor)
= =A0-Last ASN when it heart about that neighbor=A0

Other fields
=A0-Num links in the Schedule to that neighbor
=A0 = =A0 -For each link PDR
=A0-For each Queue:
=A0 =A0 - Avg Queue length in a ru= nning window
=A0 =A0 - Max Queue length in a running window (peak= )
=A0 =A0 - Current Queue length (?)
-Time source paren= t
=A0 =A0 -ID
=A0 =A0 -Avg clock drift (correction done) in a runni= ng window
=A0 =A0 -Latest clock correction
=A0 =A0 -Par= ent changes (counter of how many times I changed my time source parent)

-Option Flag (weather there are optional TLV fields)
=A0 =A0= +(TLV objects)*=A0


Hope this makes = sense.
cheers!
Xavi

=
On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne= <watteyne@eecs.berkeley.edu> wrote:
[renamed thread]

Xavi,

A few = thoughts:
-= the counters (numTx, etc) will only be present for neighbors the node has = communicate with, so they should be optional in the packet.
- you have focus= ed on the topological information (which I think is the right one). It migh= t be useful to gather other data related to synchronization or queuing.
- I couldn't= agree more with your suggestion to make it extensible. This does mean that= we will need to state somewhere that a device need to ignore silently fiel= ds it does not understand.

Thomas

On Thu, Sep 5, 2013 at 11:1= 5 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu= > wrote:
Hello, I guess that flows a= re getting defined and I started to think on the contents of the messages o= n that flows. Not sure if this is the right time or I am going way far..
According to the previous discussion I assume that the five f= lows are:

ME-6TOP - Query Flow
ME-6TOP - Action Flow

6TOP - ME - Report Flow
6TOP - ME - Event = Flow
6TOP - ME - Request BW Flow

I'd= like to start defining the content of the messages in the Report Flow:

The Report Flow: has to deal with the information that = a node knows and has to be sent to the ME so the ME can compute the schedul= e among others. Here I list =A0the information that we can know in a mote a= nd can be used at the ME to compute the schedule (complete please if I miss= something)

For each known neighbor:
=A0-ID
=A0= -AVG RSSI in a running window
=A0-Latest RSSI
=A0-Num T= X packets
=A0-Num ACK packets
=A0-Num RX packets
<= div>=A0-Last ASN when it heart about that neighbor=A0

Other fields
=A0-Num links in the Schedule to= that neighbor
=A0 =A0 -For each link PDR
=A0
=A0
Then we need to have some TLV like objects that can be used = for ad-hoc/naive/other extensions of the reporting process. In that way we = don't constraint the implementation of the scheduling alg. to that info= rmation.

what do you think?
X
<= div class=3D"gmail_extra">

On F= ri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:
= Hi all,

In this thread, we will continue the discussion about Confirmation message. He= re is some background information.

<= /span>
Context: e.g.
=A0 =A0 - node sends a report and want to know if the= report is accepted.,=A0
=A0 =A0 - ME sen= ds a action request and want to know if/when the action taken.
Options:
=A0 =A0(1= ) Nothing
=A0 =A0(2) Rely on transport mechanism (e.g. confirma= ble CoAP message)
=A0 =A0(3) App-level AC= K type
=A0 =A0(4) Use different flow (i.e. action flow)

IMHO, different control flow may have di= fferent requirement for confirmation message.
=A0 =A0 (1) Action Flow, needs a App-level confirmation, like Succ/F= ail
=A0 =A0 (2) Query Flow, automatically has the confirm= ation, i.e. the message packet corresponding to a specific query.
=A0 =A0 (3) Report Flow and Event Flow, option (1)-(3) are= OK, but I prefer option (1) and (3), i.e. the confirmation message is an o= ption, but if a confirmation message is needed, it should be App-level Ack,= instead of transport layer confirmation, which will give 6top more flexibi= lity.

What do you th= ink?

Thanks<= /div>
Qin
=A0 =A0=A0

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--047d7b1121bf9b316e04e5a831ef-- From twatteyne@gmail.com Thu Sep 5 16:03:36 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2D4F011E81C3 for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 16:03:36 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.879 X-Spam-Level: X-Spam-Status: No, score=-1.879 tagged_above=-999 required=5 tests=[AWL=0.098, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7XT+11DpAPri for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 16:03:35 -0700 (PDT) Received: from mail-pd0-x234.google.com (mail-pd0-x234.google.com [IPv6:2607:f8b0:400e:c02::234]) by ietfa.amsl.com (Postfix) with ESMTP id 8513311E80ED for <6tsch@ietf.org>; Thu, 5 Sep 2013 16:03:34 -0700 (PDT) Received: by mail-pd0-f180.google.com with SMTP id y10so2438071pdj.11 for <6tsch@ietf.org>; Thu, 05 Sep 2013 16:03:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=rR2zwgolUxdMz5cJ4kgrP0ZwShGhRCee8F7XUZxuh/Y=; b=T4VJQ/JewGBHZR+HWVoK0zOxqr819bAgnlTVx0Rat181tr0tM9CdjzPajRVw4lDWOB D4iyp+H4+SW0sUdr1oATAvQXiLGC7qePKMW7Do06vzslB+4DQSkbifdezwiTkgGkGwbv /r03g3H7XsibvHyfOKPVtRc6UgKCvpLpCsbOibPmpMv6HMUKnDi9Y1dt8kRRz9wl2qZy 0QN5WESJr+sCq0TfVHSDQh8lVUXdWmGX/Vc/wUndViDfmTI2TvqLsSD4J8fcV2duhz+9 /i5tbVQSin6PU6DgPn1rIOZHtdz5XfQsjScf2tafJD2ue/EkcRmtFSR/RQg67WcrP1zT uVIg== X-Received: by 10.68.190.197 with SMTP id gs5mr11672528pbc.90.1378422210470; Thu, 05 Sep 2013 16:03:30 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Thu, 5 Sep 2013 16:03:10 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Thu, 5 Sep 2013 16:03:10 -0700 X-Google-Sender-Auth: ObQtK_j8-db0I-Z13lPFoOP2gx0 Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=e89a8ffba97934b1fe04e5aaee17 Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 23:03:36 -0000 --e89a8ffba97934b1fe04e5aaee17 Content-Type: text/plain; charset=ISO-8859-1 Xavi, Fantastic! I believe PDR for each link might be too long to fit in a packet. While the mote will most likely keep that information, we could move that to the query flow, i.e. it is available to the PCE on-demand. Would you agree that the number of links in a bundle belongs to the neighbor? Of maybe we want a "bundle" category? In queuing, it might be interesting to see the age of the different packets, to be able to monitor latency. About LQI, there is no general consensus among vendors on what the definition is, or how exactly it is calculated. I would make it optional. Also, it might be good to be able to add arbitrary fields to each category: neighbor, queue, time source neighbor. Finally, do you envision a generic mechanism whereby the PCE can turn fields on/off, or triggered independently? Thomas On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < xvilajosana@eecs.berkeley.edu> wrote: > Hi Thomas, Diego, > > I agree that LQI should be there as well. I update here the list with > Thomas suggestions. > > For each known neighbor: > -ID > -AVG RSSI in a running window > -Latest RSSI > -AVG LQI in a running window > -Latest LQI > -Num TX packets (option in case there is communication with that neighbor) > -Num ACK packets (option in case there is communication with that > neighbor) > -Num RX packets (option in case there is communication with that neighbor) > -Last ASN when it heart about that neighbor > > Other fields > -Num links in the Schedule to that neighbor > -For each link PDR > -For each Queue: > - Avg Queue length in a running window > - Max Queue length in a running window (peak) > - Current Queue length (?) > -Time source parent > -ID > -Avg clock drift (correction done) in a running window > -Latest clock correction > -Parent changes (counter of how many times I changed my time source > parent) > > -Option Flag (weather there are optional TLV fields) > +(TLV objects)* > > > Hope this makes sense. > cheers! > Xavi > > > On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote: > >> *[renamed thread]* >> >> Xavi, >> >> A few thoughts: >> - the counters (numTx, etc) will only be present for neighbors the node >> has communicate with, so they should be optional in the packet. >> - you have focused on the topological information (which I think is the >> right one). It might be useful to gather other data related to >> synchronization or queuing. >> - I couldn't agree more with your suggestion to make it extensible. This >> does mean that we will need to state somewhere that a device need to ignore >> silently fields it does not understand. >> >> Thomas >> >> On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote: >> >>> Hello, I guess that flows are getting defined and I started to think on >>> the contents of the messages on that flows. Not sure if this is the right >>> time or I am going way far.. >>> >>> According to the previous discussion I assume that the five flows are: >>> >>> ME-6TOP - Query Flow >>> ME-6TOP - Action Flow >>> >>> 6TOP - ME - Report Flow >>> 6TOP - ME - Event Flow >>> 6TOP - ME - Request BW Flow >>> >>> I'd like to start defining the content of the messages in the Report >>> Flow: >>> >>> The Report Flow: has to deal with the information that a node knows and >>> has to be sent to the ME so the ME can compute the schedule among others. >>> Here I list the information that we can know in a mote and can be used at >>> the ME to compute the schedule (complete please if I miss something) >>> >>> For each known neighbor: >>> -ID >>> -AVG RSSI in a running window >>> -Latest RSSI >>> -Num TX packets >>> -Num ACK packets >>> -Num RX packets >>> -Last ASN when it heart about that neighbor >>> >>> Other fields >>> -Num links in the Schedule to that neighbor >>> -For each link PDR >>> >>> >>> Then we need to have some TLV like objects that can be used for >>> ad-hoc/naive/other extensions of the reporting process. In that way we >>> don't constraint the implementation of the scheduling alg. to that >>> information. >>> >>> what do you think? >>> X >>> >>> >>> On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote: >>> >>>> Hi all, >>>> >>>> In this thread, we will continue the discussion about Confirmation >>>> message. Here is some background information. >>>> >>>> Context: e.g. >>>> - node sends a report and want to know if the report is accepted., >>>> - ME sends a action request and want to know if/when the action >>>> taken. >>>> Options: >>>> (1) Nothing >>>> (2) Rely on transport mechanism (e.g. confirmable CoAP message) >>>> (3) App-level ACK type >>>> (4) Use different flow (i.e. action flow) >>>> >>>> IMHO, different control flow may have different requirement for >>>> confirmation message. >>>> (1) Action Flow, needs a App-level confirmation, like Succ/Fail >>>> (2) Query Flow, automatically has the confirmation, i.e. the >>>> message packet corresponding to a specific query. >>>> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I >>>> prefer option (1) and (3), i.e. the confirmation message is an option, but >>>> if a confirmation message is needed, it should be App-level Ack, instead of >>>> transport layer confirmation, which will give 6top more flexibility. >>>> >>>> What do you think? >>>> >>>> Thanks >>>> Qin >>>> >>>> >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch >>>> >>>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > --e89a8ffba97934b1fe04e5aaee17 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Xavi,

Fantastic!

I believe PDR for each link might be too long to fit in a packet. While = the mote will most likely keep that information, we could move that to the = query flow, i.e. it is available to the PCE on-demand.

Would you agree that the number of links in a bundle be= longs to the neighbor? Of maybe we want a "bundle" category?

In queuing, it might be interesting to see the age of = the different packets, to be able to monitor latency.

About LQI, there is no general consensus among vendors = on what the definition is, or how exactly it is calculated. I would make it= optional.

Also, it might be good to be able to ad= d arbitrary fields to each category: neighbor, queue, time source neighbor.=

Finally, do you envision a generic mechanism whereby th= e PCE can turn fields on/off, or triggered independently?

Thomas


On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen <xv= ilajosana@eecs.berkeley.edu> wrote:
Hi Thomas, Diego,

I agree that LQI shou= ld be there as well. I update here the list with Thomas suggestions.=A0

For each known neighbor:
=A0-ID
=A0-AVG RSSI in a running window<= /div>
= =A0-Latest RSSI
=A0-AVG LQI in a running window
=A0-Latest LQI
=A0-Num TX packets (option in case there is communicati= on with that neighbor)
=A0-Num ACK packets (option in case there is communication with that neighb= or)
=A0-Num RX packets (option in case there is communication with tha= t neighbor)
= =A0-Last ASN when it heart about that neighbor=A0

Other fields
=A0-Num links in the Schedule to that neighbor
=A0 = =A0 -For each link PDR
=A0-For each Queue:
=A0 =A0 - Avg Queue length i= n a running window
=A0 =A0 - Max Queue length in a running window= (peak)
=A0 =A0 - Current Queue length (?)
-Time source= parent
=A0 =A0 -ID
=A0 =A0 -Avg clock drift (correction done) in a runni= ng window
=A0 =A0 -Latest clock correction
=A0 =A0 -Par= ent changes (counter of how many times I changed my time source parent)

-Option Flag (weather there are optional TLV fields)
=A0 =A0= +(TLV objects)*=A0


Hope this makes = sense.
cheers!
Xavi


On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne= <watteyne@eecs.berkeley.edu> wrote:
[renamed thread]

Xavi,

A few = thoughts:
-= the counters (numTx, etc) will only be present for neighbors the node has = communicate with, so they should be optional in the packet.
- you have focus= ed on the topological information (which I think is the right one). It migh= t be useful to gather other data related to synchronization or queuing.
- I couldn't= agree more with your suggestion to make it extensible. This does mean that= we will need to state somewhere that a device need to ignore silently fiel= ds it does not understand.

Thomas

On Thu, Sep 5, 2013 at 11:1= 5 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu= > wrote:
Hello, I guess that flows a= re getting defined and I started to think on the contents of the messages o= n that flows. Not sure if this is the right time or I am going way far..
According to the previous discussion I assume that the five f= lows are:

ME-6TOP - Query Flow
ME-6TOP - Action Flow

6TOP - ME - Report Flow
6TOP - ME - Event = Flow
6TOP - ME - Request BW Flow

I'd= like to start defining the content of the messages in the Report Flow:

The Report Flow: has to deal with the information that = a node knows and has to be sent to the ME so the ME can compute the schedul= e among others. Here I list =A0the information that we can know in a mote a= nd can be used at the ME to compute the schedule (complete please if I miss= something)

For each known neighbor:
=A0-ID
=A0= -AVG RSSI in a running window
=A0-Latest RSSI
=A0-Num T= X packets
=A0-Num ACK packets
=A0-Num RX packets
<= div>=A0-Last ASN when it heart about that neighbor=A0

Other fields
=A0-Num links in the Schedule to= that neighbor
=A0 =A0 -For each link PDR
=A0
=A0
Then we need to have some TLV like objects that can be used = for ad-hoc/naive/other extensions of the reporting process. In that way we = don't constraint the implementation of the scheduling alg. to that info= rmation.

what do you think?
X
<= div class=3D"gmail_extra">

On F= ri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:
= Hi all,

In this thread, we will continue the discussion about Confirmation message. He= re is some background information.

<= /span>
Context: e.g.
=A0 =A0 - node sends a report and want to know if the= report is accepted.,=A0
=A0 =A0 - ME sen= ds a action request and want to know if/when the action taken.
Options:
=A0 =A0(1= ) Nothing
=A0 =A0(2) Rely on transport mechanism (e.g. confirma= ble CoAP message)
=A0 =A0(3) App-level AC= K type
=A0 =A0(4) Use different flow (i.e. action flow)

IMHO, different control flow may have di= fferent requirement for confirmation message.
=A0 =A0 (1) Action Flow, needs a App-level confirmation, like Succ/F= ail
=A0 =A0 (2) Query Flow, automatically has the confirm= ation, i.e. the message packet corresponding to a specific query.
=A0 =A0 (3) Report Flow and Event Flow, option (1)-(3) are= OK, but I prefer option (1) and (3), i.e. the confirmation message is an o= ption, but if a confirmation message is needed, it should be App-level Ack,= instead of transport layer confirmation, which will give 6top more flexibi= lity.

What do you th= ink?

Thanks<= /div>
Qin
=A0 =A0=A0

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



--e89a8ffba97934b1fe04e5aaee17-- From xvilajosana@berkeley.edu Thu Sep 5 16:17:24 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 528EA11E810B for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 16:17:24 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.74 X-Spam-Level: X-Spam-Status: No, score=-2.74 tagged_above=-999 required=5 tests=[AWL=0.236, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5v0gxSI-H-vv for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 16:17:20 -0700 (PDT) Received: from mail-pa0-f51.google.com (mail-pa0-f51.google.com [209.85.220.51]) by ietfa.amsl.com (Postfix) with ESMTP id D768311E81DF for <6tsch@ietf.org>; Thu, 5 Sep 2013 16:17:19 -0700 (PDT) Received: by mail-pa0-f51.google.com with SMTP id lf1so2545309pab.24 for <6tsch@ietf.org>; Thu, 05 Sep 2013 16:17:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=guUTYz3UQdk960gkLn2/sKWvKgsT6UMjSrJaFpre4nI=; b=UXw4l8ps58cTC4l0RvDdE59hKQkRT8a6e6d789OAbw4Y+2f19gN5jC0yv/HG12pheA NQ9BwhXrdxma91Mc5bVTQ7D5ctgW/IIz1Cloz+DZYJyZIA0SVXoOzPu/bNLbHFWiT9Zy E0bDhu4OPMGIu4rWEs2Zq6fG8LpLhso0Rp++AHYwPF2RjPE2Jv4+ronLstXUmWVelvsr CCPmDuqISX1dNYVTuF+BWsffedR5hob+7VcSlQ4B+KrSHV5wk8KvPMZpHVQQw94cKVGA k2WQMeDA757lbHrU7gGpJ5KQwBRgYAlJQEyO8GnwrcSz/iGgIHIjc+iuQbREVH46RWmd ZtIg== X-Gm-Message-State: ALoCoQn1G1ogPHJYVXdlQxbdZc8DmgzVJNFapnrq5x2QfRk+8b/DxRpSLCiNrcWPlFKn2TbQClGv MIME-Version: 1.0 X-Received: by 10.68.247.36 with SMTP id yb4mr11789331pbc.138.1378423039369; Thu, 05 Sep 2013 16:17:19 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Thu, 5 Sep 2013 16:17:19 -0700 (PDT) In-Reply-To: References: Date: Thu, 5 Sep 2013 16:17:19 -0700 Message-ID: From: Xavier Vilajosana Guillen To: Thomas Watteyne Content-Type: multipart/alternative; boundary=047d7b2e3d289cb6fe04e5ab1f72 Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 23:17:24 -0000 --047d7b2e3d289cb6fe04e5ab1f72 Content-Type: text/plain; charset=ISO-8859-1 agreed! So the fields become: For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -AVG LQI in a running window [optional] -Latest LQI [optional] -Num TX packets (option in case there is communication with that neighbor) -Num ACK packets (option in case there is communication with that neighbor) -Num RX packets (option in case there is communication with that neighbor) -Last ASN when it heart about that neighbor -Bundle: Num links in the Schedule to that neighbor -PDR per link [Optional -- or maybe best and worst PDR only] -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -For each Queue: - Avg Queue length in a running window - Max Queue length in a running window (peak) - Current Queue length (?) - ASN of the oldest packet in the QUEUE? -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -Time source parent -ID -Avg clock drift (correction done) in a running window -Latest clock correction -Parent changes (counter of how many times I changed my time source parent) -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -Option Flag (weather there are optional TLV fields in other categories) +(TLV objects)* as regards to this: "Finally, do you envision a generic mechanism whereby the PCE can turn fields on/off, or triggered independently?" I see it as CoAP Options, where a set of bytes can be used as "clever bitmap" to tell what options are there, the parsing will decode option by option and will read the fields. In that way any combination of fields is supported. would that work? X On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne wrote: > Xavi, > > Fantastic! > > I believe PDR for each link might be too long to fit in a packet. While > the mote will most likely keep that information, we could move that to the > query flow, i.e. it is available to the PCE on-demand. > > Would you agree that the number of links in a bundle belongs to the > neighbor? Of maybe we want a "bundle" category? > > In queuing, it might be interesting to see the age of the different > packets, to be able to monitor latency. > > About LQI, there is no general consensus among vendors on what the > definition is, or how exactly it is calculated. I would make it optional. > > Also, it might be good to be able to add arbitrary fields to each > category: neighbor, queue, time source neighbor. > > Finally, do you envision a generic mechanism whereby the PCE can turn > fields on/off, or triggered independently? > > Thomas > > > On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote: > >> Hi Thomas, Diego, >> >> I agree that LQI should be there as well. I update here the list with >> Thomas suggestions. >> >> For each known neighbor: >> -ID >> -AVG RSSI in a running window >> -Latest RSSI >> -AVG LQI in a running window >> -Latest LQI >> -Num TX packets (option in case there is communication with that >> neighbor) >> -Num ACK packets (option in case there is communication with that >> neighbor) >> -Num RX packets (option in case there is communication with that >> neighbor) >> -Last ASN when it heart about that neighbor >> >> Other fields >> -Num links in the Schedule to that neighbor >> -For each link PDR >> -For each Queue: >> - Avg Queue length in a running window >> - Max Queue length in a running window (peak) >> - Current Queue length (?) >> -Time source parent >> -ID >> -Avg clock drift (correction done) in a running window >> -Latest clock correction >> -Parent changes (counter of how many times I changed my time source >> parent) >> >> -Option Flag (weather there are optional TLV fields) >> +(TLV objects)* >> >> >> Hope this makes sense. >> cheers! >> Xavi >> >> >> On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote: >> >>> *[renamed thread]* >>> >>> Xavi, >>> >>> A few thoughts: >>> - the counters (numTx, etc) will only be present for neighbors the node >>> has communicate with, so they should be optional in the packet. >>> - you have focused on the topological information (which I think is the >>> right one). It might be useful to gather other data related to >>> synchronization or queuing. >>> - I couldn't agree more with your suggestion to make it extensible. This >>> does mean that we will need to state somewhere that a device need to ignore >>> silently fields it does not understand. >>> >>> Thomas >>> >>> On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < >>> xvilajosana@eecs.berkeley.edu> wrote: >>> >>>> Hello, I guess that flows are getting defined and I started to think on >>>> the contents of the messages on that flows. Not sure if this is the right >>>> time or I am going way far.. >>>> >>>> According to the previous discussion I assume that the five flows are: >>>> >>>> ME-6TOP - Query Flow >>>> ME-6TOP - Action Flow >>>> >>>> 6TOP - ME - Report Flow >>>> 6TOP - ME - Event Flow >>>> 6TOP - ME - Request BW Flow >>>> >>>> I'd like to start defining the content of the messages in the Report >>>> Flow: >>>> >>>> The Report Flow: has to deal with the information that a node knows and >>>> has to be sent to the ME so the ME can compute the schedule among others. >>>> Here I list the information that we can know in a mote and can be used at >>>> the ME to compute the schedule (complete please if I miss something) >>>> >>>> For each known neighbor: >>>> -ID >>>> -AVG RSSI in a running window >>>> -Latest RSSI >>>> -Num TX packets >>>> -Num ACK packets >>>> -Num RX packets >>>> -Last ASN when it heart about that neighbor >>>> >>>> Other fields >>>> -Num links in the Schedule to that neighbor >>>> -For each link PDR >>>> >>>> >>>> Then we need to have some TLV like objects that can be used for >>>> ad-hoc/naive/other extensions of the reporting process. In that way we >>>> don't constraint the implementation of the scheduling alg. to that >>>> information. >>>> >>>> what do you think? >>>> X >>>> >>>> >>>> On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote: >>>> >>>>> Hi all, >>>>> >>>>> In this thread, we will continue the discussion about Confirmation >>>>> message. Here is some background information. >>>>> >>>>> Context: e.g. >>>>> - node sends a report and want to know if the report is accepted., >>>>> - ME sends a action request and want to know if/when the action >>>>> taken. >>>>> Options: >>>>> (1) Nothing >>>>> (2) Rely on transport mechanism (e.g. confirmable CoAP message) >>>>> (3) App-level ACK type >>>>> (4) Use different flow (i.e. action flow) >>>>> >>>>> IMHO, different control flow may have different requirement for >>>>> confirmation message. >>>>> (1) Action Flow, needs a App-level confirmation, like Succ/Fail >>>>> (2) Query Flow, automatically has the confirmation, i.e. the >>>>> message packet corresponding to a specific query. >>>>> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I >>>>> prefer option (1) and (3), i.e. the confirmation message is an option, but >>>>> if a confirmation message is needed, it should be App-level Ack, instead of >>>>> transport layer confirmation, which will give 6top more flexibility. >>>>> >>>>> What do you think? >>>>> >>>>> Thanks >>>>> Qin >>>>> >>>>> >>>>> _______________________________________________ >>>>> 6tsch mailing list >>>>> 6tsch@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch >>>> >>>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >> > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --047d7b2e3d289cb6fe04e5ab1f72 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
agreed!
So the fields become:


For each known neighbor:
= =A0-ID
=A0-AVG RSSI in a running window
=A0-Latest RSSI
=
=A0-AVG LQI in a running window [optional]
=A0-Latest LQI [o= ptional]
=A0-Num TX packets (option in case there is communicatio= n with that neighbor)
=A0-Num ACK packets (option in case there is communication with that n= eighbor)
=A0-Num RX packets (option in case there is communicatio= n with that neighbor)
=A0-Last ASN when it hear= t about that neighbor=A0
=A0-Bundle: Num links in the Schedule to that neighbor
= =A0 =A0 =A0 -PDR per link [Optional -- or maybe best and worst PDR only]
=A0
=A0-Option Flag (weather there are optional TLV fields on that cat= egory)
=A0 =A0+(TLV objects)*=A0

=A0-F= or each Queue:
=A0 =A0 - Avg Queue length in a running window
=A0 =A0 - Max Queue len= gth in a running window (peak)
=A0 =A0 - Current Queue length (?)
=A0 =A0 - ASN of the oldest packet = in the QUEUE?
=A0 =A0 -Option Flag (weather there are optional TLV fields on that ca= tegory)
=A0 =A0 =A0 =A0 +(TLV objects)*=A0

-Time source parent
= =A0 =A0 -ID
=A0 =A0 -Avg clock drift (correction done) in a running wi= ndow
= =A0 =A0 -Latest clock correction
=A0 =A0 -Parent changes (counter of h= ow many times I changed my time source parent)
=
=A0 =A0 -Option Flag (weather there are optional TLV fields on that ca= tegory)
=A0 =A0 +(TLV objects)*=A0

-Option Flag (weather there are optional TLV fields in other categories)
=A0 =A0+(TLV objects)*=A0

as regards to t= his:

"Finally, do you envision a generic mechanism whe= reby the PCE can turn fields on/off, or triggered independently?"

I see it= as CoAP Options, where a set of bytes can be used as "clever bitmap&q= uot; to tell what options are there, the parsing will decode option by opti= on and will read the fields. In that way any combination of fields is suppo= rted.

would that work?
X


On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <watteyne@eecs.be= rkeley.edu> wrote:
Xavi,

Fantastic!

I believe PDR for each link might be too long to fit in a packet. While = the mote will most likely keep that information, we could move that to the = query flow, i.e. it is available to the PCE on-demand.

Would you agree that the number of links in a bundle be= longs to the neighbor? Of maybe we want a "bundle" category?

In queuing, it might be interesting to see the age of = the different packets, to be able to monitor latency.

About LQI, there is no general consensus among vendors = on what the definition is, or how exactly it is calculated. I would make it= optional.

Also, it might be good to be able to ad= d arbitrary fields to each category: neighbor, queue, time source neighbor.=

Finally, do you envision a generic mechanism whereby th= e PCE can turn fields on/off, or triggered independently?

Thomas
=


=
On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen <xv= ilajosana@eecs.berkeley.edu> wrote:
Hi Thomas, Diego,

I agree that LQI shou= ld be there as well. I update here the list with Thomas suggestions.=A0

For each known neighbor:
=A0-ID
=A0-AVG RSSI in a running window<= /div>
= =A0-Latest RSSI
=A0-AVG LQI in a running window
=A0-Latest LQI
=A0-Num TX packets (option in case there is communicati= on with that neighbor)
=A0-Num ACK packets (option in case there is communication with that neighb= or)
=A0-Num RX packets (option in case there is communication with tha= t neighbor)
= =A0-Last ASN when it heart about that neighbor=A0

Other fields
=A0-Num links in the Schedule to that neighbor
=A0 = =A0 -For each link PDR
=A0-For each Queue:
=A0 =A0 - Avg Queue length i= n a running window
=A0 =A0 - Max Queue length in a running window= (peak)
=A0 =A0 - Current Queue length (?)
-Time source= parent
=A0 =A0 -ID
=A0 =A0 -Avg clock drift (correction done) in a runni= ng window
=A0 =A0 -Latest clock correction
=A0 =A0 -Par= ent changes (counter of how many times I changed my time source parent)

-Option Flag (weather there are optional TLV fields)
=A0 =A0= +(TLV objects)*=A0


Hope this makes = sense.
cheers!
Xavi


On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne= <watteyne@eecs.berkeley.edu> wrote:
[renamed thread]

Xavi,

A few = thoughts:
-= the counters (numTx, etc) will only be present for neighbors the node has = communicate with, so they should be optional in the packet.
- you have focus= ed on the topological information (which I think is the right one). It migh= t be useful to gather other data related to synchronization or queuing.
- I couldn't= agree more with your suggestion to make it extensible. This does mean that= we will need to state somewhere that a device need to ignore silently fiel= ds it does not understand.

Thomas

On Thu, Sep 5, 2013 at 11:1= 5 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu= > wrote:
Hello, I guess that flows a= re getting defined and I started to think on the contents of the messages o= n that flows. Not sure if this is the right time or I am going way far..
According to the previous discussion I assume that the five f= lows are:

ME-6TOP - Query Flow
ME-6TOP - Action Flow

6TOP - ME - Report Flow
6TOP - ME - Event = Flow
6TOP - ME - Request BW Flow

I'd= like to start defining the content of the messages in the Report Flow:

The Report Flow: has to deal with the information that = a node knows and has to be sent to the ME so the ME can compute the schedul= e among others. Here I list =A0the information that we can know in a mote a= nd can be used at the ME to compute the schedule (complete please if I miss= something)

For each known neighbor:
=A0-ID
=A0= -AVG RSSI in a running window
=A0-Latest RSSI
=A0-Num T= X packets
=A0-Num ACK packets
=A0-Num RX packets
<= div>=A0-Last ASN when it heart about that neighbor=A0

Other fields
=A0-Num links in the Schedule to= that neighbor
=A0 =A0 -For each link PDR
=A0
=A0
Then we need to have some TLV like objects that can be used = for ad-hoc/naive/other extensions of the reporting process. In that way we = don't constraint the implementation of the scheduling alg. to that info= rmation.

what do you think?
X
<= div class=3D"gmail_extra">

On F= ri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:
= Hi all,

In this thread, we will continue the discussion about Confirmation message. He= re is some background information.

<= /span>
Context: e.g.
=A0 =A0 - node sends a report and want to know if the= report is accepted.,=A0
=A0 =A0 - ME sen= ds a action request and want to know if/when the action taken.
Options:
=A0 =A0(1= ) Nothing
=A0 =A0(2) Rely on transport mechanism (e.g. confirma= ble CoAP message)
=A0 =A0(3) App-level AC= K type
=A0 =A0(4) Use different flow (i.e. action flow)

IMHO, different control flow may have di= fferent requirement for confirmation message.
=A0 =A0 (1) Action Flow, needs a App-level confirmation, like Succ/F= ail
=A0 =A0 (2) Query Flow, automatically has the confirm= ation, i.e. the message packet corresponding to a specific query.
=A0 =A0 (3) Report Flow and Event Flow, option (1)-(3) are= OK, but I prefer option (1) and (3), i.e. the confirmation message is an o= ption, but if a confirmation message is needed, it should be App-level Ack,= instead of transport layer confirmation, which will give 6top more flexibi= lity.

What do you th= ink?

Thanks<= /div>
Qin
=A0 =A0=A0

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch




_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--047d7b2e3d289cb6fe04e5ab1f72-- From twatteyne@gmail.com Thu Sep 5 16:18:57 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 669B621F9E62 for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 16:18:57 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.881 X-Spam-Level: X-Spam-Status: No, score=-1.881 tagged_above=-999 required=5 tests=[AWL=0.096, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7J2CegSXG8lc for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 16:18:56 -0700 (PDT) Received: from mail-pd0-x230.google.com (mail-pd0-x230.google.com [IPv6:2607:f8b0:400e:c02::230]) by ietfa.amsl.com (Postfix) with ESMTP id 798FA21F9C99 for <6tsch@ietf.org>; Thu, 5 Sep 2013 16:18:50 -0700 (PDT) Received: by mail-pd0-f176.google.com with SMTP id q10so2448295pdj.21 for <6tsch@ietf.org>; Thu, 05 Sep 2013 16:18:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc:content-type; bh=gsmHls4/zFoD0JyD89Ztb1kJnGHYaB60PV+JoSrBjpI=; b=fzQMHRQF9lJw/+amxJhGp2xzZ7CwaZcg3pMq7ZxEgLvd/uMc7NwiwHYtW5noG7DtBc L2CTZUICtJ3BRhWLA0z3uvE7KczIxFi3NHO3hsB1K8/KXmIb4VtSkFvP+djjAc34Gc5M 0SDlL5d3cl5vUgenC9FtOoIW7a97DNWrVQ8iiUaPVVvTOxVOBfcXEwUTfs/FQbFN7h2V DHFjE7NnWc4WWaJ18EF+wpsgmm3vljiyLVe7WH19K37CbYy6c7kQtjXPDNl+GdGtykpB lFsp8eTB2aI5jvILgtjKTClD7h+8QPnb1D4tXKcIaond6jk58Jn7GModKd+XNnzBqV2B wPEQ== X-Received: by 10.68.222.99 with SMTP id ql3mr11766250pbc.132.1378423130015; Thu, 05 Sep 2013 16:18:50 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Thu, 5 Sep 2013 16:18:29 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Thu, 5 Sep 2013 16:18:29 -0700 X-Google-Sender-Auth: TPJLHLDI6tqjc8uXWYKcUwDXUUY Message-ID: To: Xavi Vilajosana Content-Type: multipart/alternative; boundary=047d7b2eddc103cd8804e5ab2540 Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2013 23:18:57 -0000 --047d7b2eddc103cd8804e5ab2540 Content-Type: text/plain; charset=ISO-8859-1 Fantastic. I guess something like that could work. Thomas On Thu, Sep 5, 2013 at 4:17 PM, Xavier Vilajosana Guillen < xvilajosana@eecs.berkeley.edu> wrote: > agreed! > So the fields become: > > > For each known neighbor: > -ID > -AVG RSSI in a running window > -Latest RSSI > -AVG LQI in a running window [optional] > -Latest LQI [optional] > -Num TX packets (option in case there is communication with that neighbor) > -Num ACK packets (option in case there is communication with that > neighbor) > -Num RX packets (option in case there is communication with that neighbor) > -Last ASN when it heart about that neighbor > -Bundle: Num links in the Schedule to that neighbor > -PDR per link [Optional -- or maybe best and worst PDR only] > > -Option Flag (weather there are optional TLV fields on that category) > +(TLV objects)* > > -For each Queue: > - Avg Queue length in a running window > - Max Queue length in a running window (peak) > - Current Queue length (?) > - ASN of the oldest packet in the QUEUE? > -Option Flag (weather there are optional TLV fields on that category) > +(TLV objects)* > > -Time source parent > -ID > -Avg clock drift (correction done) in a running window > -Latest clock correction > -Parent changes (counter of how many times I changed my time source > parent) > -Option Flag (weather there are optional TLV fields on that category) > +(TLV objects)* > > -Option Flag (weather there are optional TLV fields in other categories) > +(TLV objects)* > > as regards to this: > > "Finally, do you envision a generic mechanism whereby the PCE can turn > fields on/off, or triggered independently?" > > I see it as CoAP Options, where a set of bytes can be used as "clever > bitmap" to tell what options are there, the parsing will decode option by > option and will read the fields. In that way any combination of fields is > supported. > > would that work? > X > > > On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote: > >> Xavi, >> >> Fantastic! >> >> I believe PDR for each link might be too long to fit in a packet. While >> the mote will most likely keep that information, we could move that to the >> query flow, i.e. it is available to the PCE on-demand. >> >> Would you agree that the number of links in a bundle belongs to the >> neighbor? Of maybe we want a "bundle" category? >> >> In queuing, it might be interesting to see the age of the different >> packets, to be able to monitor latency. >> >> About LQI, there is no general consensus among vendors on what the >> definition is, or how exactly it is calculated. I would make it optional. >> >> Also, it might be good to be able to add arbitrary fields to each >> category: neighbor, queue, time source neighbor. >> >> Finally, do you envision a generic mechanism whereby the PCE can turn >> fields on/off, or triggered independently? >> >> Thomas >> >> >> On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote: >> >>> Hi Thomas, Diego, >>> >>> I agree that LQI should be there as well. I update here the list with >>> Thomas suggestions. >>> >>> For each known neighbor: >>> -ID >>> -AVG RSSI in a running window >>> -Latest RSSI >>> -AVG LQI in a running window >>> -Latest LQI >>> -Num TX packets (option in case there is communication with that >>> neighbor) >>> -Num ACK packets (option in case there is communication with that >>> neighbor) >>> -Num RX packets (option in case there is communication with that >>> neighbor) >>> -Last ASN when it heart about that neighbor >>> >>> Other fields >>> -Num links in the Schedule to that neighbor >>> -For each link PDR >>> -For each Queue: >>> - Avg Queue length in a running window >>> - Max Queue length in a running window (peak) >>> - Current Queue length (?) >>> -Time source parent >>> -ID >>> -Avg clock drift (correction done) in a running window >>> -Latest clock correction >>> -Parent changes (counter of how many times I changed my time source >>> parent) >>> >>> -Option Flag (weather there are optional TLV fields) >>> +(TLV objects)* >>> >>> >>> Hope this makes sense. >>> cheers! >>> Xavi >>> >>> >>> On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < >>> watteyne@eecs.berkeley.edu> wrote: >>> >>>> *[renamed thread]* >>>> >>>> Xavi, >>>> >>>> A few thoughts: >>>> - the counters (numTx, etc) will only be present for neighbors the node >>>> has communicate with, so they should be optional in the packet. >>>> - you have focused on the topological information (which I think is the >>>> right one). It might be useful to gather other data related to >>>> synchronization or queuing. >>>> - I couldn't agree more with your suggestion to make it extensible. >>>> This does mean that we will need to state somewhere that a device need to >>>> ignore silently fields it does not understand. >>>> >>>> Thomas >>>> >>>> On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < >>>> xvilajosana@eecs.berkeley.edu> wrote: >>>> >>>>> Hello, I guess that flows are getting defined and I started to think >>>>> on the contents of the messages on that flows. Not sure if this is the >>>>> right time or I am going way far.. >>>>> >>>>> According to the previous discussion I assume that the five flows are: >>>>> >>>>> ME-6TOP - Query Flow >>>>> ME-6TOP - Action Flow >>>>> >>>>> 6TOP - ME - Report Flow >>>>> 6TOP - ME - Event Flow >>>>> 6TOP - ME - Request BW Flow >>>>> >>>>> I'd like to start defining the content of the messages in the Report >>>>> Flow: >>>>> >>>>> The Report Flow: has to deal with the information that a node knows >>>>> and has to be sent to the ME so the ME can compute the schedule among >>>>> others. Here I list the information that we can know in a mote and can be >>>>> used at the ME to compute the schedule (complete please if I miss something) >>>>> >>>>> For each known neighbor: >>>>> -ID >>>>> -AVG RSSI in a running window >>>>> -Latest RSSI >>>>> -Num TX packets >>>>> -Num ACK packets >>>>> -Num RX packets >>>>> -Last ASN when it heart about that neighbor >>>>> >>>>> Other fields >>>>> -Num links in the Schedule to that neighbor >>>>> -For each link PDR >>>>> >>>>> >>>>> Then we need to have some TLV like objects that can be used for >>>>> ad-hoc/naive/other extensions of the reporting process. In that way we >>>>> don't constraint the implementation of the scheduling alg. to that >>>>> information. >>>>> >>>>> what do you think? >>>>> X >>>>> >>>>> >>>>> On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote: >>>>> >>>>>> Hi all, >>>>>> >>>>>> In this thread, we will continue the discussion about Confirmation >>>>>> message. Here is some background information. >>>>>> >>>>>> Context: e.g. >>>>>> - node sends a report and want to know if the report is >>>>>> accepted., >>>>>> - ME sends a action request and want to know if/when the action >>>>>> taken. >>>>>> Options: >>>>>> (1) Nothing >>>>>> (2) Rely on transport mechanism (e.g. confirmable CoAP message) >>>>>> (3) App-level ACK type >>>>>> (4) Use different flow (i.e. action flow) >>>>>> >>>>>> IMHO, different control flow may have different requirement for >>>>>> confirmation message. >>>>>> (1) Action Flow, needs a App-level confirmation, like Succ/Fail >>>>>> (2) Query Flow, automatically has the confirmation, i.e. the >>>>>> message packet corresponding to a specific query. >>>>>> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I >>>>>> prefer option (1) and (3), i.e. the confirmation message is an option, but >>>>>> if a confirmation message is needed, it should be App-level Ack, instead of >>>>>> transport layer confirmation, which will give 6top more flexibility. >>>>>> >>>>>> What do you think? >>>>>> >>>>>> Thanks >>>>>> Qin >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> 6tsch mailing list >>>>>> 6tsch@ietf.org >>>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>>> >>>>>> >>>>> >>>>> _______________________________________________ >>>>> 6tsch mailing list >>>>> 6tsch@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch >>>> >>>> >>> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > --047d7b2eddc103cd8804e5ab2540 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Fantastic. I guess something like that could work.
Tho= mas


On Thu, Sep 5, 2013 at 4:17 PM, Xavier Vilajosana Guillen <x= vilajosana@eecs.berkeley.edu> wrote:
agreed!
So the fields b= ecome:


For each known neighbor:
=A0-ID
=A0-AVG RSSI in a running window
=A0-Latest RSSI
=
=A0-AVG LQI in a running window [optional]
=A0-Latest = LQI [optional]
=A0-Num TX packets (option in ca= se there is communication with that neighbor)
=A0-Num ACK packets (option in case there is communication with that n= eighbor)
=A0-Num RX packets (option in case there is communicatio= n with that neighbor)
=A0-Last ASN w= hen it heart about that neighbor=A0
=A0-Bundle: Num links in the Schedule to that neighbor
=
=A0 =A0 =A0 -PDR per link [Optional -- or maybe best and worst PDR onl= y]
=A0
=A0-Option Flag (weather there are optional TLV fields on that cat= egory)
=A0 =A0+(TLV objects)*=A0

=A0-For each Queue:
=A0 =A0 - Avg Queue length in a running window
=A0 =A0 - Max Queue len= gth in a running window (peak)
=A0 =A0 - Current Queue length (?)
=A0 =A0 - ASN of the oldest p= acket in the QUEUE?
=A0 =A0 -Option Flag (weather there are optional TLV fields on that ca= tegory)
=A0 =A0 =A0 =A0 +(TLV objects)*=A0

-Time source parent
= =A0 =A0 -ID
=A0 =A0 -Avg clock drift (correction done) in a running wi= ndow
= =A0 =A0 -Latest clock correction
=A0 =A0 -Parent changes (counter of h= ow many times I changed my time source parent)
=A0 =A0 -Option Flag (weather there are optional TLV fields on t= hat category)
=A0 =A0 +(TLV objects)*=A0

-Option Flag (weather there are optional TLV fields in other categories)
=A0 =A0+(TLV objects)*=A0

as regards to t= his:

"Finally, do you envision a generic mechanism whe= reby the PCE can turn fields on/off, or triggered independently?"

I = see it as CoAP Options, where a set of bytes can be used as "clever bi= tmap" to tell what options are there, the parsing will decode option b= y option and will read the fields. In that way any combination of fields is= supported.

would that work?
X


=
On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <watteyne@eecs.be= rkeley.edu> wrote:
Xavi,

Fantastic!

I believe PDR for each link might be too long to fit in a packet. While = the mote will most likely keep that information, we could move that to the = query flow, i.e. it is available to the PCE on-demand.

Would you agree that the number of links in a bundle be= longs to the neighbor? Of maybe we want a "bundle" category?

In queuing, it might be interesting to see the age of = the different packets, to be able to monitor latency.

About LQI, there is no general consensus among vendors = on what the definition is, or how exactly it is calculated. I would make it= optional.

Also, it might be good to be able to ad= d arbitrary fields to each category: neighbor, queue, time source neighbor.=

Finally, do you envision a generic mechanism whereby th= e PCE can turn fields on/off, or triggered independently?

Thomas


On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen <xv= ilajosana@eecs.berkeley.edu> wrote:
Hi Thomas, Diego,

I agree that LQI shou= ld be there as well. I update here the list with Thomas suggestions.=A0

For each known neighbor:
=A0-ID
=A0-AVG RSSI in a running window<= /div>
= =A0-Latest RSSI
=A0-AVG LQI in a running window
=A0-Latest LQI
=A0-Num TX packets (option in case there is communicati= on with that neighbor)
=A0-Num ACK packets (option in case there is communication with that neighb= or)
=A0-Num RX packets (option in case there is communication with tha= t neighbor)
= =A0-Last ASN when it heart about that neighbor=A0

Other fields
=A0-Num links in the Schedule to that neighbor
=A0 = =A0 -For each link PDR
=A0-For each Queue:
=A0 =A0 - Avg Queue length i= n a running window
=A0 =A0 - Max Queue length in a running window= (peak)
=A0 =A0 - Current Queue length (?)
-Time source= parent
=A0 =A0 -ID
=A0 =A0 -Avg clock drift (correction done) in a runni= ng window
=A0 =A0 -Latest clock correction
=A0 =A0 -Par= ent changes (counter of how many times I changed my time source parent)

-Option Flag (weather there are optional TLV fields)
=A0 =A0= +(TLV objects)*=A0


Hope this makes = sense.
cheers!
Xavi


On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne= <watteyne@eecs.berkeley.edu> wrote:
[renamed thread]

Xavi,

A few = thoughts:
-= the counters (numTx, etc) will only be present for neighbors the node has = communicate with, so they should be optional in the packet.
- you have focus= ed on the topological information (which I think is the right one). It migh= t be useful to gather other data related to synchronization or queuing.
- I couldn't= agree more with your suggestion to make it extensible. This does mean that= we will need to state somewhere that a device need to ignore silently fiel= ds it does not understand.

Thomas

On Thu, Sep 5, 2013 at 11:1= 5 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu= > wrote:
Hello, I guess that flows a= re getting defined and I started to think on the contents of the messages o= n that flows. Not sure if this is the right time or I am going way far..
According to the previous discussion I assume that the five f= lows are:

ME-6TOP - Query Flow
ME-6TOP - Action Flow

6TOP - ME - Report Flow
6TOP - ME - Event = Flow
6TOP - ME - Request BW Flow

I'd= like to start defining the content of the messages in the Report Flow:

The Report Flow: has to deal with the information that = a node knows and has to be sent to the ME so the ME can compute the schedul= e among others. Here I list =A0the information that we can know in a mote a= nd can be used at the ME to compute the schedule (complete please if I miss= something)

For each known neighbor:
=A0-ID
=A0= -AVG RSSI in a running window
=A0-Latest RSSI
=A0-Num T= X packets
=A0-Num ACK packets
=A0-Num RX packets
<= div>=A0-Last ASN when it heart about that neighbor=A0

Other fields
=A0-Num links in the Schedule to= that neighbor
=A0 =A0 -For each link PDR
=A0
=A0
Then we need to have some TLV like objects that can be used = for ad-hoc/naive/other extensions of the reporting process. In that way we = don't constraint the implementation of the scheduling alg. to that info= rmation.

what do you think?
X
<= div class=3D"gmail_extra">

On F= ri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:
= Hi all,

In this thread, we will continue the discussion about Confirmation message. He= re is some background information.

<= /span>
Context: e.g.
=A0 =A0 - node sends a report and want to know if the= report is accepted.,=A0
=A0 =A0 - ME sen= ds a action request and want to know if/when the action taken.
Options:
=A0 =A0(1= ) Nothing
=A0 =A0(2) Rely on transport mechanism (e.g. confirma= ble CoAP message)
=A0 =A0(3) App-level AC= K type
=A0 =A0(4) Use different flow (i.e. action flow)

IMHO, different control flow may have di= fferent requirement for confirmation message.
=A0 =A0 (1) Action Flow, needs a App-level confirmation, like Succ/F= ail
=A0 =A0 (2) Query Flow, automatically has the confirm= ation, i.e. the message packet corresponding to a specific query.
=A0 =A0 (3) Report Flow and Event Flow, option (1)-(3) are= OK, but I prefer option (1) and (3), i.e. the confirmation message is an o= ption, but if a confirmation message is needed, it should be App-level Ack,= instead of transport layer confirmation, which will give 6top more flexibi= lity.

What do you th= ink?

Thanks<= /div>
Qin
=A0 =A0=A0

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch




_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



--047d7b2eddc103cd8804e5ab2540-- From twatteyne@gmail.com Thu Sep 5 19:07:44 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 965F421E81AC for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 19:07:44 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.884 X-Spam-Level: X-Spam-Status: No, score=-1.884 tagged_above=-999 required=5 tests=[AWL=0.093, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ze-qH1T8rZQH for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 19:07:43 -0700 (PDT) Received: from mail-pb0-x236.google.com (mail-pb0-x236.google.com [IPv6:2607:f8b0:400e:c01::236]) by ietfa.amsl.com (Postfix) with ESMTP id BFBFD21E8192 for <6tsch@ietf.org>; Thu, 5 Sep 2013 19:07:42 -0700 (PDT) Received: by mail-pb0-f54.google.com with SMTP id ro12so2575794pbb.41 for <6tsch@ietf.org>; Thu, 05 Sep 2013 19:07:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=OqiL0cHPy1IA1L/6R8r535M6Dn7faFf+A+bDAZT0sDs=; b=PurgVgRr2oXNTsr0bOncJ8gUjWIXTDQzqN4U+09CE76FWGUORAA8WLILVTwx898xV9 yHsmCz9UcXhnmYJp1AlBCYxPK5432nqF+3mTAG8fmYJh/oCCNAM2f4n9CbMqVA5IS9Oj e9P5/FNCchDAb2/t6siU0gjyWPgDDxqRB0CCGbWtM+i5ezx8ZhOFcTZhNVwFOC6Z/kil +Rr0XP9EALar8RsNEbD4OeTKudYINru1lynfHgH+9z0CRpncDTqUhGLd63dkYh0hIUXJ txVwA7+rc2PDLpscACI9pKLVhKEFIvCl3UH6Huq+XY35HxMf3aqIz0SHIfUZSB5pjlcl 4VYg== X-Received: by 10.68.254.42 with SMTP id af10mr138404pbd.154.1378433253119; Thu, 05 Sep 2013 19:07:33 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Thu, 5 Sep 2013 19:07:13 -0700 (PDT) From: Thomas Watteyne Date: Thu, 5 Sep 2013 19:07:13 -0700 X-Google-Sender-Auth: v_RTb1d9m0U0vPCT6wNjyxBPPhc Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b2e0d836630f104e5ad80f2 Subject: [6tsch] Agenda for the call on September 6 X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2013 02:07:45 -0000 --047d7b2e0d836630f104e5ad80f2 Content-Type: text/plain; charset=ISO-8859-1 All, The goal of tomorrow's call is to wrap up the discussion on the minimal case, and on the flows, and to start discussing the packet contents. The proposed agenda is: - Approval minutes & agenda bashing [3min] - charter update - Flow identification [40min] - 5 flows? Identify the tiers (ME in device, PCE, NME) - CoAP mechanisms we could reuse - Discussion commands and information exchanged in flows (report) - Using RPL in minimal 6TiSCH case [15min] - Rank, Join Priority and flow label - RPL and OF0 - Impact of routing loops on synchronization - AOB [2min] As usual, feel free to propose any changes to the agenda, also at the beginning of the call. Remember that this call will be recorded. Pascal & Thomas ---- Topic: 6TSCH Weekly Time: 8:00 am, Pacific Daylight Time (San Francisco, GMT-07:00) Meeting Number: 206 802 913 Meeting Password: sixtus ------------------------------------------------------- To start the online meeting ------------------------------------------------------- 1. Go to https://ciscosales.webex.com/ciscosales/j.php?ED=219615007&UID=481905242&PW=NZTRkNDAwOTE1&RT=MiMyMw%3D%3D 2. Log in to your account. 3. Click "Start Now". 4. Follow the instructions that appear on your screen. ---------------------------------------------------------------- ALERT:Toll-Free Dial Restrictions for (408) and (919) Area Codes ---------------------------------------------------------------- The affected toll free numbers are: (866) 432-9903 for the San Jose/Milpitas area and (866) 349-3520 for the RTP area. Please dial the local access number for your area from the list below: - San Jose/Milpitas (408) area: 525-6800 - RTP (919) area: 392-3330 ------------------------------------------------------- To join the teleconference only ------------------------------------------------------- 1. Dial into Cisco WebEx (view all Global Access Numbers at http://cisco.com/en/US/about/doing_business/conferencing/index.html 2. Follow the prompts to enter the Meeting Number (listed above) or Access Code followed by the # sign. San Jose, CA: +1.408.525.6800 RTP: +1.919.392.3330 US/Canada: +1.866.432.9903 United Kingdom: +44.20.8824.0117 India: +91.80.4350.1111 Germany: +49.619.6773.9002 Japan: +81.3.5763.9394 China: +86.10.8515.5666 To check whether you have the appropriate players installed for UCF (Universal Communications Format) rich media files, go to https://ciscosales.webex.com/ciscosales/systemdiagnosis.php http://www.webex.com CCM:+14085256800x206802913 --047d7b2e0d836630f104e5ad80f2 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
All,

The goal of tomorrow= 9;s call is to wrap up the discussion on the minimal case, and on the flows= , and to start discussing the packet contents.

The= proposed agenda is:

  • Approval minutes & agenda bashing [3mi= n]
    • charter update
  • Flow identification [40min]<= br>
    • 5 flows? Identify the tiers (ME in device, PCE, NME)
    • CoAP mechanisms we could reuse
    • Discussion commands and informat= ion exchanged in flows (report)
  • Using RPL in minimal 6TiSCH ca= se [15min]
    • Rank, Join Priority and flow label
    • RPL and OF0
    • Impact of routing loops on synchronization
  • AOB [2min]
    <= /li>

As usual, feel free to propose any= changes to the agenda, also at the beginning of the call.

Remember that this call will be recorded.

Pascal & Thomas

----

Topic: 6TSCH Weekly
Time: 8:00 am, Pacific Daylight Time (San = Francisco, GMT-07:00)=A0
Meeting Number: 206 802 913=A0
Meeting Password: sixtus=A0

---------------------------------------------------= ----=A0
To start the online meeting=A0
----------------= ---------------------------------------=A0
2. Log in to your account.=A0
3. Click "Start Now"= .=A0
4. Follow the instructions that appear on your screen.=A0

----------------------------------------------------= ------------=A0
ALERT:Toll-Free Dial Restrictions for (408) and (919) Area Codes=A0
----------------------------------------------------------------=A0=

The affected toll free numbers are: (866) 432-9903 for the San Jose/Milpitas area and (866) 349-3520 for the RTP= area.=A0

Please dial the local access number for your area from = the list below:=A0
- San Jose/Milpitas (408) area: 525-6800=A0
- RTP (919) area: 392-3330=A0

------------= -------------------------------------------=A0
To join the teleconference only=A0
-------------------------= ------------------------------=A0
1. Dial into Cisco WebEx (view = all Global Access Numbers at=A0
2. Follow the prompts to enter the Meeting Number (listed above) or Ac= cess Code followed by the # sign.=A0

San Jose, CA:= +1.408.52= 5.6800 RTP: +1.919.392.3330=A0

US/Canada: +1.866.432.9903 United Kingdom: +44.20= .8824.0117=A0

India: +91.80.4350.1111 Germany: +49.619.6773.9002=A0

Japan: +81.3.5763.9394 China: +86.10.8515.5666=A0

To check whether you have the appropriate players i= nstalled for UCF (Universal Communications Format) rich media files, go to = htt= ps://ciscosales.webex.com/ciscosales/systemdiagnosis.php=A0


--047d7b2e0d836630f104e5ad80f2-- From pthubert@cisco.com Thu Sep 5 23:22:45 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 67AAA11E8280 for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 23:22:45 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.186 X-Spam-Level: X-Spam-Status: No, score=-10.186 tagged_above=-999 required=5 tests=[AWL=-0.187, BAYES_00=-2.599, J_CHICKENPOX_34=0.6, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 99id1mLwipaE for <6tsch@ietfa.amsl.com>; Thu, 5 Sep 2013 23:22:38 -0700 (PDT) Received: from rcdn-iport-6.cisco.com (rcdn-iport-6.cisco.com [173.37.86.77]) by ietfa.amsl.com (Postfix) with ESMTP id 7B53011E827E for <6tsch@ietf.org>; Thu, 5 Sep 2013 23:22:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=14299; q=dns/txt; s=iport; t=1378448558; x=1379658158; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=omMwNVqIAyP/hTD//GwhFCIx2+OIZlgq5wO5MIwVo7A=; b=mUUXjFMwH8h8iMuryp9kT0wAZYWtKgB6hpWuSXDIEN0/IyB7N2MaHfqi 0moCvb7/GZ88LFKbBMex/9gKMWWg0H2Vyy8e70daCg1kZyX7Spgcjhvr9 wEKkNZB38BRZN7kM5WYfhs6YINGkk7ynakfG1xvrwQvV7lqPxfiQ0tLc8 Y=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgsFAOJzKVKtJXG9/2dsb2JhbABRCoMHNVHBUoEoFnSCJAEBAQMBAQEBJCIeBwsMBAIBCBEEAQEBCh0HJwsUCQgCBA4FCId0Bgy7DI4vCoEIBisHAgSDF4EAA4h9kCeQN4MggXE5 X-IronPort-AV: E=Sophos;i="4.90,852,1371081600"; d="scan'208";a="256354782" Received: from rcdn-core2-2.cisco.com ([173.37.113.189]) by rcdn-iport-6.cisco.com with ESMTP; 06 Sep 2013 06:22:37 +0000 Received: from xhc-aln-x10.cisco.com (xhc-aln-x10.cisco.com [173.36.12.84]) by rcdn-core2-2.cisco.com (8.14.5/8.14.5) with ESMTP id r866Mbdr011494 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 6 Sep 2013 06:22:37 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-aln-x10.cisco.com ([173.36.12.84]) with mapi id 14.02.0318.004; Fri, 6 Sep 2013 01:22:37 -0500 From: "Pascal Thubert (pthubert)" To: "Prof. Diego Dujovne" Thread-Topic: [6tsch] About the special type of event to ask PCE to create a track Thread-Index: AQHOqmXhvNF3zWfNUUeZLJxljh9TZ5m3ePk2gABeUYCAAFzYIA== Date: Fri, 6 Sep 2013 06:22:36 +0000 Deferred-Delivery: Fri, 6 Sep 2013 06:22:00 +0000 Message-ID: References: In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.61.200.228] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org>, "JP Vasseur \(jvasseur\)" Subject: Re: [6tsch] About the special type of event to ask PCE to create a track X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2013 06:22:45 -0000 That's another interesting discussion Diego, To be very clear, there should not be more intelligence in 6Top than what's= needed to act on a schedule, hard or soft. If there is any management brain at all, it should be in the ME, and then t= he ME talks to 6Top or the external entities. 6Top does not really care which flows cause the call to the APIs, either th= rough the ME Service Access Point or the data SAP. The control flows that we are talking about are really between PCE, NME (ad= min console, mobile handheld) and ME in the device, with maybe some proxy o= r pub sub in the middle. This is where the binary that we are chartering to define will be transmitt= ed. So picking Xavi's list I'd map pour work as follows: ME-6TOP - Query Flow (NME or PCE) -> ME ME-6TOP - Action Flow (NME or PCE) -> ME =09 6TOP - ME - Report Flow ME -> (NME or PCE) 6TOP - ME - Event Flow ME -> (NME or PCE) 6TOP - ME - Request BW Flow (ME or NME) -> PCE And I would apply Maria-Rita's suggestion to rename Request BW Flow into "s= chedule flow". The sequence we are talking about would become like: 6Top ME NME PCE=09 =09 ---------------------- schedule (instance) ----------------> =09 OR -- schedule (instance)->=09 <--------------------- Action (instance) -------------------- -- event (instance) ---> -- event (instance) ---> It would be clearer that we define a 6th flow like this (NME or PCE) -> ME - Query Flow=09 (NME or PCE) -> ME - Action Flow=09 PCE -> NME - Schedule info Flow =09 ME -> NME -> PCE - Report Flow =09 ME -> NME -> PCE - Event Flow =09 (ME or NME) -> PCE - Schedule Flow The sequence we are talking about would become=20 6Top ME NME PCE=09 =09 ---------------------- schedule (instance) ----------------> =09 OR -- schedule (instance)->=09 <--------------------- Action (instance) -------------------- -------------------- event (instance) ---------------------->=09 <- schedule info (instance)--=09 We cannot expect the ME to do more than a few retries of schedule (instance= ), using CoAP. In all cases all we really need is that the message is received, and if the= PCE is stateful as we expect, we can save the ack for the action.=20 The PCE will wait for the report or retry on time out. What do you think? Pascal -----Original Message----- From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of P= rof. Diego Dujovne Sent: jeudi 5 septembre 2013 21:14 To: Pascal Thubert (pthubert) Cc: Thomas Watteyne; 6tsch@ietf.org; JP Vasseur (jvasseur) Subject: Re: [6tsch] About the special type of event to ask PCE to create a= track Pascal, I was not looking for the node to fix it, just looking to unders= tand how smart 6top should be, or which entity should provide an answer ins= tead. Thanks, Diego 2013/9/5 Pascal Thubert (pthubert) : > +1 > > If the PCE cannot solve the problem I can hardly see how the mote could f= ix it... > > Pascal > > Le 5 sept. 2013 =E0 20:30, "Thomas Watteyne" = a =E9crit : > >> Diego, all, >> >> Let's not get confused. IMHO, the goal is to mainly identify the interac= tions between the PCE, and the mesh and the Internet, to guide us in the ch= oice of the different packets. I created the figure below so we have someth= ing clear to argue over. Comments/edits more than welcome. >> >> [Inline image 1] >> >> About your question, Diego, I believe that the request flow should conta= in a mechanism for the requester to query the state of its request, and for= the PCE to notify the requester about the outcome. It the PCE cannot satis= fy the request, that is an administrative issue rather than a networking is= sue. I believe that this is out of scope. >> >> Thomas >> >> >> On Thu, Sep 5, 2013 at 5:40 AM, Prof. Diego Dujovne > wrote: >> Dear All, >> Then, we have two flows to update the track: >> Schedule flow (6top to ME): An action flow to ask for a new=20 >> cell/track >> - Execution Confirm (Success/Failure) if requested This means that=20 >> the request was queued. >> Action flow (ME to 6top): An action flow to announce the update of=20 >> the schedule - Execution Confirm (Success/Failure) What happens if=20 >> the queued request cannot be satisfied (e.g. energy policy=20 >> restriction)? >> Comments? >> >> Diego Dujovne >> >> >> >> 2013/9/5 Pascal Thubert (pthubert) >: >>> Yes. >>> >>> >>> >>> And the aim should be to make sure that the PCE has queued the=20 >>> request to build a track. >>> >>> That request may be served asynchronously, considering that the PCE=20 >>> sometimes needs to defragment / reoptimize multiple flows, and it=20 >>> may stack some requests for a short while. >>> >>> When the PCE is finally ready, it computes the track, and pushes it=20 >>> through an action flow; but I would consider that a different flow,=20 >>> not an embedded flow for the reason above. >>> >>> >>> >>> Makes sense? >>> >>> >>> >>> Pascal >>> >>> >>> >>> From: Maria Rita PALATTELLA=20 >>> [mailto:maria-rita.palattella@uni.lu>> i.lu>] >>> Sent: jeudi 5 septembre 2013 09:16 >>> >>> >>> To: Pascal Thubert (pthubert); Qin Wang >>> Cc: Thomas Watteyne; 6tsch@ietf.org >>> Subject: RE: [6tsch] About the special type of event to ask PCE to=20 >>> create a track >>> >>> >>> >>> It makes sense for me. Even though they are generated by different=20 >>> entities, they are both addressed to the PCE, and they have the same fi= nal aim. >>> >>> Maria Rita >>> >>> >>> >>> From: Pascal Thubert (pthubert)=20 >>> [mailto:pthubert@cisco.com] >>> Sent: Thursday, September 05, 2013 9:02 AM >>> To: Maria Rita PALATTELLA; Qin Wang >>> Cc: Thomas Watteyne; 6tsch@ietf.org >>> Subject: RE: [6tsch] About the special type of event to ask PCE to=20 >>> create a track >>> >>> >>> >>> Fine with me Maria Rita, >>> >>> >>> >>> But note that there is also a flow that fits the name "schedule=20 >>> flow" that is stimulated by the Net mgt Entity in the admin console=20 >>> as opposed to the mt entity in the device. >>> >>> Same thing, this creates a req to the PCE to install a track. Do we=20 >>> want to merge those 2 flows? - I think so. >>> >>> >>> >>> Cheers, >>> >>> >>> >>> Pascal >>> >>> >>> >>> From: Maria Rita PALATTELLA=20 >>> [mailto:maria-rita.palattella@uni.lu>> i.lu>] >>> Sent: jeudi 5 septembre 2013 08:47 >>> To: Pascal Thubert (pthubert); Qin Wang >>> Cc: Thomas Watteyne; 6tsch@ietf.org >>> Subject: RE: [6tsch] About the special type of event to ask PCE to=20 >>> create a track >>> >>> >>> >>> I agree too. If we want to cut the name shorter, maybe we can just=20 >>> call it " Schedule Flow" (removing the update). >>> >>> In the end, we know that this flow will happen when a node asks the=20 >>> PCE to update its schedule, and add/remove cells/tracks. What do you th= ink? >>> >>> Maria Rita >>> >>> >>> >>> From: 6tsch-bounces@ietf.org=20 >>> [mailto:6tsch-bounces@ietf.org] On=20 >>> Behalf Of Pascal Thubert (pthubert) >>> Sent: Thursday, September 05, 2013 7:29 AM >>> To: Qin Wang >>> Cc: Thomas Watteyne; 6tsch@ietf.org >>> Subject: Re: [6tsch] About the special type of event to ask PCE to=20 >>> create a track >>> >>> >>> >>> +1 >>> >>> Pascal >>> >>> >>> Le 5 sept. 2013 =E0 00:10, "Qin Wang" > a =E9crit : >>> >>> Thomas, >>> >>> >>> >>> I think "Flow" is a process to exchange messages for a given=20 >>> objective. For example, action flow consists of a Action Request=20 >>> from ME to 6top, and a Execution Confirm (Succ/Fail) from 6top to=20 >>> ME. But, "Schedule update request" looks like one step of a process.=20 >>> I would like to suggest that the 5th flow is called "Schedule update=20 >>> flow", consists of a "Schedule update request" from node to PCE, and=20 >>> something like "Track/cell installation" from PCE to node. >>> >>> >>> >>> Make sense? >>> >>> Qin >>> >>> >>> >>> On Thu, Sep 5, 2013 at 5:29 AM, Thomas Watteyne=20 >>> > >>> wrote: >>> >>> I would agree that a 5th flow makes sense, especially because it=20 >>> allows us to use different transport mechanisms for the report flow=20 >>> (CoAP?) and this new flows (CoAP now? maybe PCEP later?). >>> >>> >>> >>> Do what do we call this new flow? "Schedule update request" is a bit lo= ng. >>> >>> >>> >>> Thomas >>> >>> >>> >>> On Wed, Sep 4, 2013 at 2:12 PM, Qin Wang > wrote: >>> >>> Hi Thomas, >>> >>> >>> >>> Thanks for your explanation. You are saying the request packet from=20 >>> node is generated by the upper layer of 6top, correct? >>> >>> >>> >>> If so, since the request packet is generated by upper layer of 6top,=20 >>> instead of 6top internal events like alarm, I think it is reasonable=20 >>> to add the 5th control flow. >>> >>> >>> >>> What do you think? >>> >>> >>> >>> Qin >>> >>> >>> >>> On Wed, Sep 4, 2013 at 10:12 AM, Thomas Watteyne=20 >>> > wrote: >>> >>> Qin, >>> >>> >>> >>> Thanks for bringing that up. Allow me to answer in Pascal's place.=20 >>> We are talking about the format of the packets exchanged between the=20 >>> ME and the nodes. In the centralized case, these are application-level = packets, i.e. >>> packet generated by an entity a couple of layer above 6top. That=20 >>> entity talks with the PCE over the network, and with 6top through=20 >>> the API (internal to the node) as defined in=20 >>> http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4. >>> >>> >>> >>> If we agree on that, the question is whether the packet the node=20 >>> sends to establish a new track is part of the event flow, or not. In=20 >>> both cases, it would originate from this application-level entity,=20 >>> but possibly transported in different ways. >>> >>> >>> >>> Thomas >>> >>> >>> >>> On Fri, Aug 30, 2013 at 11:01 AM, Qin Wang > wrote: >>> >>> Hi Pascal, >>> >>> >>> >>> My understanding is that 6top is a passive role in dealing with=20 >>> cell/track reservation. In another word, the 6top in a node can=20 >>> report its state, including neighbor table, cell usage, and other=20 >>> statistics information, but can not make decision on if some=20 >>> cells/track should be added or removed, which should be the=20 >>> responsibility of PCE in centralized case or upper layer in=20 >>> distributed case. Thus, I can not see when the 5th flow will be used. C= an you explain more? >>> >>> >>> >>> Thanks >>> >>> Qin >>> >>> >>> >>> On Sat, Aug 31, 2013 at 12:08 AM, Pascal Thubert (pthubert)=20 >>> > wrote: >>> >>> Dear all, >>> >>> We discussed at the call that the(PCEP?) request to ask for a track=20 >>> establishment could be seen as an event, or could be a new flow. >>> At the call, I suggested that it could be a new, 5th flow. My=20 >>> arguments are that this flow: >>> - Probably yields different data format. The demand carries and=20 >>> points, end to end latency and bandwidth. That's quite specific. >>> - Probably yields a different flow. Events do not necessarily have a=20 >>> response. >>> - Probably uses a different transport as well (PCEP vs. CoAP) >>> >>> What do you think? >>> >>> Pascal >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >>> >>> >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >> >> >> >> -- >> DIEGO DUJOVNE >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicacione= s=20 >> Facultad de Ingenier=EDa UDP=20 >> www.ingenieria.udp.cl >> (56 2) 676 8125 >> >> <6tisch_flows.png> >> <6tisch_flows.ppt> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > -- DIEGO DUJOVNE Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones F= acultad de Ingenier=EDa UDP www.ingenieria.udp.cl (56 2) 676 8125 _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch From qinwang@berkeley.edu Fri Sep 6 06:40:56 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C936F11E818B for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 06:40:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.887 X-Spam-Level: X-Spam-Status: No, score=-2.887 tagged_above=-999 required=5 tests=[AWL=0.089, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id NsyY48zwxIy8 for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 06:40:52 -0700 (PDT) Received: from mail-vb0-f53.google.com (mail-vb0-f53.google.com [209.85.212.53]) by ietfa.amsl.com (Postfix) with ESMTP id 38DD211E8128 for <6tsch@ietf.org>; Fri, 6 Sep 2013 06:40:52 -0700 (PDT) Received: by mail-vb0-f53.google.com with SMTP id i3so2136392vbh.40 for <6tsch@ietf.org>; Fri, 06 Sep 2013 06:40:51 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=kRL21KmuShR5XfTzR2UyKsv643NJh652Ovzc31mtMGU=; b=ewb8vYGspScsn/DOHuDeY68dkrKXzP1CFDsWnZ0bhgWXl2ttjaPXXPghMcoWHyY+ai pVoOG78wVb2/DNi1yDx7NYNKq+pG9mui9ugG24MrIYuI+8oMBz6jH2A8zcglyxuLbCtq Ly/i/FVvRC9mqKq6gtXIt0/AggPwqpC3IVh4RXmOKzgisfxLN3qa35oqrCgtvuhfKeKj SXzD3zuEc6oflCq4yv7Kj1ak8GaQGkPzSfrJKSEVJGEvmSShs6y2iCEyURl1jxmbZIfp eS4649ptk8nRT1RlfV0R4QZOY9w5GbGi0HW6MVxVZfLMnckWTz8E6WSMX0npiIIcMQsp H3cw== X-Gm-Message-State: ALoCoQmy8i0D9Np1lA1EV4WnaJpxNa0UeMsdmxBo3QYyXGgBsitJsoKGk6xLUYWEg/fzKWBabRmd MIME-Version: 1.0 X-Received: by 10.58.118.130 with SMTP id km2mr2396473veb.0.1378474851552; Fri, 06 Sep 2013 06:40:51 -0700 (PDT) Received: by 10.220.116.135 with HTTP; Fri, 6 Sep 2013 06:40:51 -0700 (PDT) In-Reply-To: References: Date: Fri, 6 Sep 2013 21:40:51 +0800 Message-ID: From: Qin Wang To: Thomas Watteyne Content-Type: multipart/alternative; boundary=089e013a05acdbe41404e5b72f4f Cc: "6tsch@ietf.org" <6tsch@ietf.org>, Xavi Vilajosana Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2013 13:40:56 -0000 --089e013a05acdbe41404e5b72f4f Content-Type: text/plain; charset=ISO-8859-1 Hi Xavi and Thomas, I agree Xavi's the list. I also agree that it is very important to have a generic mechanism whereby the PCE can turn fields on/off, or triggered independently. I guess "Option Flag" is used to turn on/off. Correct? Furthermore, I would like suggest to think the list as MIB, and leave Report Packet configurable. For example, in the following list -ID -AVG RSSI in a running window -Latest RSSI -AVG LQI in a running window [optional] -Latest LQI [optional] -Num TX packets (option in case there is communication with that neighbor) -Num ACK packets (option in case there is communication with that neighbor) -Num RX packets (option in case there is communication with that neighbor) -Last ASN when it heart about that neighbor -Bundle: Num links in the Schedule to that neighbor -PDR per link [Optional -- or maybe best and worst PDR only] -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* A specific PCE is not interested in Latest RSSI, then the PCE can use Action Flow to configure its own Report Packet without the field, and don't need the "Option Flag" in every report packet. What do you think? Qin On Fri, Sep 6, 2013 at 7:18 AM, Thomas Watteyne wrote: > Fantastic. I guess something like that could work. > Thomas > > > On Thu, Sep 5, 2013 at 4:17 PM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote: > >> agreed! >> So the fields become: >> >> >> For each known neighbor: >> -ID >> -AVG RSSI in a running window >> -Latest RSSI >> -AVG LQI in a running window [optional] >> -Latest LQI [optional] >> -Num TX packets (option in case there is communication with that >> neighbor) >> -Num ACK packets (option in case there is communication with that >> neighbor) >> -Num RX packets (option in case there is communication with that >> neighbor) >> -Last ASN when it heart about that neighbor >> -Bundle: Num links in the Schedule to that neighbor >> -PDR per link [Optional -- or maybe best and worst PDR only] >> >> -Option Flag (weather there are optional TLV fields on that category) >> +(TLV objects)* >> >> -For each Queue: >> - Avg Queue length in a running window >> - Max Queue length in a running window (peak) >> - Current Queue length (?) >> - ASN of the oldest packet in the QUEUE? >> -Option Flag (weather there are optional TLV fields on that category) >> +(TLV objects)* >> >> -Time source parent >> -ID >> -Avg clock drift (correction done) in a running window >> -Latest clock correction >> -Parent changes (counter of how many times I changed my time source >> parent) >> -Option Flag (weather there are optional TLV fields on that category) >> +(TLV objects)* >> >> -Option Flag (weather there are optional TLV fields in other categories) >> +(TLV objects)* >> >> as regards to this: >> >> "Finally, do you envision a generic mechanism whereby the PCE can turn >> fields on/off, or triggered independently?" >> >> I see it as CoAP Options, where a set of bytes can be used as "clever >> bitmap" to tell what options are there, the parsing will decode option by >> option and will read the fields. In that way any combination of fields is >> supported. >> >> would that work? >> X >> >> >> On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote: >> >>> Xavi, >>> >>> Fantastic! >>> >>> I believe PDR for each link might be too long to fit in a packet. While >>> the mote will most likely keep that information, we could move that to the >>> query flow, i.e. it is available to the PCE on-demand. >>> >>> Would you agree that the number of links in a bundle belongs to the >>> neighbor? Of maybe we want a "bundle" category? >>> >>> In queuing, it might be interesting to see the age of the different >>> packets, to be able to monitor latency. >>> >>> About LQI, there is no general consensus among vendors on what the >>> definition is, or how exactly it is calculated. I would make it optional. >>> >>> Also, it might be good to be able to add arbitrary fields to each >>> category: neighbor, queue, time source neighbor. >>> >>> Finally, do you envision a generic mechanism whereby the PCE can turn >>> fields on/off, or triggered independently? >>> >>> Thomas >>> >>> >>> On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < >>> xvilajosana@eecs.berkeley.edu> wrote: >>> >>>> Hi Thomas, Diego, >>>> >>>> I agree that LQI should be there as well. I update here the list with >>>> Thomas suggestions. >>>> >>>> For each known neighbor: >>>> -ID >>>> -AVG RSSI in a running window >>>> -Latest RSSI >>>> -AVG LQI in a running window >>>> -Latest LQI >>>> -Num TX packets (option in case there is communication with that >>>> neighbor) >>>> -Num ACK packets (option in case there is communication with that >>>> neighbor) >>>> -Num RX packets (option in case there is communication with that >>>> neighbor) >>>> -Last ASN when it heart about that neighbor >>>> >>>> Other fields >>>> -Num links in the Schedule to that neighbor >>>> -For each link PDR >>>> -For each Queue: >>>> - Avg Queue length in a running window >>>> - Max Queue length in a running window (peak) >>>> - Current Queue length (?) >>>> -Time source parent >>>> -ID >>>> -Avg clock drift (correction done) in a running window >>>> -Latest clock correction >>>> -Parent changes (counter of how many times I changed my time source >>>> parent) >>>> >>>> -Option Flag (weather there are optional TLV fields) >>>> +(TLV objects)* >>>> >>>> >>>> Hope this makes sense. >>>> cheers! >>>> Xavi >>>> >>>> >>>> On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < >>>> watteyne@eecs.berkeley.edu> wrote: >>>> >>>>> *[renamed thread]* >>>>> >>>>> Xavi, >>>>> >>>>> A few thoughts: >>>>> - the counters (numTx, etc) will only be present for neighbors the >>>>> node has communicate with, so they should be optional in the packet. >>>>> - you have focused on the topological information (which I think is >>>>> the right one). It might be useful to gather other data related to >>>>> synchronization or queuing. >>>>> - I couldn't agree more with your suggestion to make it extensible. >>>>> This does mean that we will need to state somewhere that a device need to >>>>> ignore silently fields it does not understand. >>>>> >>>>> Thomas >>>>> >>>>> On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < >>>>> xvilajosana@eecs.berkeley.edu> wrote: >>>>> >>>>>> Hello, I guess that flows are getting defined and I started to think >>>>>> on the contents of the messages on that flows. Not sure if this is the >>>>>> right time or I am going way far.. >>>>>> >>>>>> According to the previous discussion I assume that the five flows are: >>>>>> >>>>>> ME-6TOP - Query Flow >>>>>> ME-6TOP - Action Flow >>>>>> >>>>>> 6TOP - ME - Report Flow >>>>>> 6TOP - ME - Event Flow >>>>>> 6TOP - ME - Request BW Flow >>>>>> >>>>>> I'd like to start defining the content of the messages in the Report >>>>>> Flow: >>>>>> >>>>>> The Report Flow: has to deal with the information that a node knows >>>>>> and has to be sent to the ME so the ME can compute the schedule among >>>>>> others. Here I list the information that we can know in a mote and can be >>>>>> used at the ME to compute the schedule (complete please if I miss something) >>>>>> >>>>>> For each known neighbor: >>>>>> -ID >>>>>> -AVG RSSI in a running window >>>>>> -Latest RSSI >>>>>> -Num TX packets >>>>>> -Num ACK packets >>>>>> -Num RX packets >>>>>> -Last ASN when it heart about that neighbor >>>>>> >>>>>> Other fields >>>>>> -Num links in the Schedule to that neighbor >>>>>> -For each link PDR >>>>>> >>>>>> >>>>>> Then we need to have some TLV like objects that can be used for >>>>>> ad-hoc/naive/other extensions of the reporting process. In that way we >>>>>> don't constraint the implementation of the scheduling alg. to that >>>>>> information. >>>>>> >>>>>> what do you think? >>>>>> X >>>>>> >>>>>> >>>>>> On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote: >>>>>> >>>>>>> Hi all, >>>>>>> >>>>>>> In this thread, we will continue the discussion about Confirmation >>>>>>> message. Here is some background information. >>>>>>> >>>>>>> Context: e.g. >>>>>>> - node sends a report and want to know if the report is >>>>>>> accepted., >>>>>>> - ME sends a action request and want to know if/when the action >>>>>>> taken. >>>>>>> Options: >>>>>>> (1) Nothing >>>>>>> (2) Rely on transport mechanism (e.g. confirmable CoAP message) >>>>>>> (3) App-level ACK type >>>>>>> (4) Use different flow (i.e. action flow) >>>>>>> >>>>>>> IMHO, different control flow may have different requirement for >>>>>>> confirmation message. >>>>>>> (1) Action Flow, needs a App-level confirmation, like Succ/Fail >>>>>>> (2) Query Flow, automatically has the confirmation, i.e. the >>>>>>> message packet corresponding to a specific query. >>>>>>> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I >>>>>>> prefer option (1) and (3), i.e. the confirmation message is an option, but >>>>>>> if a confirmation message is needed, it should be App-level Ack, instead of >>>>>>> transport layer confirmation, which will give 6top more flexibility. >>>>>>> >>>>>>> What do you think? >>>>>>> >>>>>>> Thanks >>>>>>> Qin >>>>>>> >>>>>>> >>>>>>> _______________________________________________ >>>>>>> 6tsch mailing list >>>>>>> 6tsch@ietf.org >>>>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>>>> >>>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> 6tsch mailing list >>>>>> 6tsch@ietf.org >>>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>>> >>>>>> >>>>> >>>>> _______________________________________________ >>>>> 6tsch mailing list >>>>> 6tsch@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>> >>>>> >>>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >> > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --089e013a05acdbe41404e5b72f4f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hi Xavi and Thomas,

I agree Xavi's = the list. I also agree that it is very important to=A0have a generic mechanism whereby the= PCE can turn fields on/off, or triggered independently. I guess "Opti= on Flag" is used to turn on/off. Correct?

Furthermore, I would like suggest to think the list as = MIB, and leave Report Packet configurable. For example, in the following li= st

=A0-ID
=A0-AVG RSSI in a running window
=A0-Latest= RSSI
=A0-AVG LQI in a running window [optional]
=A0-Latest LQI [optional]
=A0-Num TX packets (option in case there i= s communication with that neighbor)
=A0-Num ACK packets (option i= n case there is communication with that neighbor)
=A0-Num RX packets (option in case there is communication with that ne= ighbor)
=A0-Last ASN when it heart about that neighbor=A0
=A0-Bundle: Num links in the Schedule to that neighbor
=A0 = =A0 =A0 -PDR per link [Optional -- or maybe best and worst PDR only]
<= div>

=A0-Option Flag (weather there are optional TLV fields on that ca= tegory)
=A0 =A0+(TLV objects)*=A0

A specific PCE is not interested i= n Latest RSSI, then the PCE can use Action Flow to configure its own Report= Packet without the field, and don't need the "Option Flag" i= n every report packet.
=
What do you think?

Qin


On Fri, Sep 6, 2013 at 7:18 AM, Thomas = Watteyne <watteyne@eecs.berkeley.edu> wrote:
Fantastic. I guess somethin= g like that could work.
= Thomas


On Thu, Sep 5, 2013 at 4:17 = PM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu> wrote:
agreed!
So the fields b= ecome:


For each known neighbor:
=A0-ID
=A0-AVG RSSI in a running window
=A0-Latest RSSI
=
=A0-AVG LQI in a running window [optional]
=A0-Latest = LQI [optional]
=A0-Num TX packets (option in case there is c= ommunication with that neighbor)
=A0-Num ACK packets (option in case there is communication with that n= eighbor)
=A0-Num RX packets (option in case there is communicatio= n with that neighbor)
=A0-Last ASN when it heart = about that neighbor=A0
=A0-Bundle: Num links in the Schedule to that neighbor
=
=A0 =A0 =A0 -PDR per link [Optional -- or maybe best and worst PDR onl= y]
=A0
=A0-Option Flag (weather there are optional TLV fields on that cat= egory)
=A0 =A0+(TLV objects)*=A0

=
= =A0-For each Queue:
=A0 =A0 - Avg Queue length in a running window
=A0 =A0 - Max Queue len= gth in a running window (peak)
=A0 =A0 - Current Queue length (?)
=A0 =A0 - ASN of the oldest p= acket in the QUEUE?
=A0 =A0 -Option Flag (weather there are optional TLV fields on that ca= tegory)
=A0 =A0 =A0 =A0 +(TLV objects)*=A0

-Time source parent
= =A0 =A0 -ID
=A0 =A0 -Avg clock drift (correction done) in a running wi= ndow
= =A0 =A0 -Latest clock correction
=A0 =A0 -Parent changes (counter of h= ow many times I changed my time source parent)
=A0 =A0 -Option Flag (weather there are optional TLV fields on t= hat category)
=A0 =A0 +(TLV objects)*=A0

-Option Flag (weather there are optional TLV fields in other categories)
=A0 =A0+(TLV objects)*=A0

as regards to t= his:

"Finally, do you envision a generic mechanism whe= reby the PCE can turn fields on/off, or triggered independently?"

I = see it as CoAP Options, where a set of bytes can be used as "clever bi= tmap" to tell what options are there, the parsing will decode option b= y option and will read the fields. In that way any combination of fields is= supported.

would that work?
X


On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <watteyne@eecs.be= rkeley.edu> wrote:
Xavi,

Fantastic!

I believe PDR for each link might be too long to fit in a packet. While = the mote will most likely keep that information, we could move that to the = query flow, i.e. it is available to the PCE on-demand.

Would you agree that the number of links in a bundle be= longs to the neighbor? Of maybe we want a "bundle" category?

In queuing, it might be interesting to see the age of = the different packets, to be able to monitor latency.

About LQI, there is no general consensus among vendors = on what the definition is, or how exactly it is calculated. I would make it= optional.

Also, it might be good to be able to ad= d arbitrary fields to each category: neighbor, queue, time source neighbor.=

Finally, do you envision a generic mechanism whereby th= e PCE can turn fields on/off, or triggered independently?

Thomas


On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen <xv= ilajosana@eecs.berkeley.edu> wrote:
Hi Thomas, Diego,

I agree that LQI shou= ld be there as well. I update here the list with Thomas suggestions.=A0

For each known neighbor:
=A0-ID
=A0-AVG RSSI in a running window<= /div>
= =A0-Latest RSSI
=A0-AVG LQI in a running window
=A0-Latest LQI
=A0-Num TX packets (option in case there is communicati= on with that neighbor)
=A0-Num ACK packets (option in case there is communication with that neighb= or)
=A0-Num RX packets (option in case there is communication with tha= t neighbor)
= =A0-Last ASN when it heart about that neighbor=A0

Other fields
=A0-Num links in the Schedule to that neighbor
=A0 = =A0 -For each link PDR
=A0-For each Queue:
=A0 =A0 - Avg Queue length i= n a running window
=A0 =A0 - Max Queue length in a running window= (peak)
=A0 =A0 - Current Queue length (?)
-Time source= parent
=A0 =A0 -ID
=A0 =A0 -Avg clock drift (correction done) in a runni= ng window
=A0 =A0 -Latest clock correction
=A0 =A0 -Par= ent changes (counter of how many times I changed my time source parent)

-Option Flag (weather there are optional TLV fields)
=A0 =A0= +(TLV objects)*=A0


Hope this makes = sense.
cheers!
Xavi


On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne= <watteyne@eecs.berkeley.edu> wrote:
[renamed thread]

Xavi,

A few = thoughts:
-= the counters (numTx, etc) will only be present for neighbors the node has = communicate with, so they should be optional in the packet.
- you have focus= ed on the topological information (which I think is the right one). It migh= t be useful to gather other data related to synchronization or queuing.
- I couldn't= agree more with your suggestion to make it extensible. This does mean that= we will need to state somewhere that a device need to ignore silently fiel= ds it does not understand.

Thomas

On Thu, Sep 5, 2013 at 11:1= 5 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu= > wrote:
Hello, I guess that flows a= re getting defined and I started to think on the contents of the messages o= n that flows. Not sure if this is the right time or I am going way far..
According to the previous discussion I assume that the five f= lows are:

ME-6TOP - Query Flow
ME-6TOP - Action Flow

6TOP - ME - Report Flow
6TOP - ME - Event = Flow
6TOP - ME - Request BW Flow

I'd= like to start defining the content of the messages in the Report Flow:

The Report Flow: has to deal with the information that = a node knows and has to be sent to the ME so the ME can compute the schedul= e among others. Here I list =A0the information that we can know in a mote a= nd can be used at the ME to compute the schedule (complete please if I miss= something)

For each known neighbor:
=A0-ID
=A0= -AVG RSSI in a running window
=A0-Latest RSSI
=A0-Num T= X packets
=A0-Num ACK packets
=A0-Num RX packets
<= div>=A0-Last ASN when it heart about that neighbor=A0

Other fields
=A0-Num links in the Schedule to= that neighbor
=A0 =A0 -For each link PDR
=A0
=A0
Then we need to have some TLV like objects that can be used = for ad-hoc/naive/other extensions of the reporting process. In that way we = don't constraint the implementation of the scheduling alg. to that info= rmation.

what do you think?
X
<= div class=3D"gmail_extra">

On F= ri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:
= Hi all,

In this thread, we will continue the discussion about Confirmation message. He= re is some background information.

<= /span>
Context: e.g.
=A0 =A0 - node sends a report and want to know if the= report is accepted.,=A0
=A0 =A0 - ME sen= ds a action request and want to know if/when the action taken.
Options:
=A0 =A0(1= ) Nothing
=A0 =A0(2) Rely on transport mechanism (e.g. confirma= ble CoAP message)
=A0 =A0(3) App-level AC= K type
=A0 =A0(4) Use different flow (i.e. action flow)

IMHO, different control flow may have di= fferent requirement for confirmation message.
=A0 =A0 (1) Action Flow, needs a App-level confirmation, like Succ/F= ail
=A0 =A0 (2) Query Flow, automatically has the confirm= ation, i.e. the message packet corresponding to a specific query.
=A0 =A0 (3) Report Flow and Event Flow, option (1)-(3) are= OK, but I prefer option (1) and (3), i.e. the confirmation message is an o= ption, but if a confirmation message is needed, it should be App-level Ack,= instead of transport layer confirmation, which will give 6top more flexibi= lity.

What do you th= ink?

Thanks<= /div>
Qin
=A0 =A0=A0

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch




_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch




_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--089e013a05acdbe41404e5b72f4f-- From diego.dujovne@mail.udp.cl Fri Sep 6 07:50:10 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C211111E8196 for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 07:50:10 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.797 X-Spam-Level: X-Spam-Status: No, score=-2.797 tagged_above=-999 required=5 tests=[AWL=0.180, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LYnhprGiEDf9 for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 07:50:06 -0700 (PDT) Received: from mail-wi0-f171.google.com (mail-wi0-f171.google.com [209.85.212.171]) by ietfa.amsl.com (Postfix) with ESMTP id 837DC11E81A0 for <6tsch@ietf.org>; Fri, 6 Sep 2013 07:50:05 -0700 (PDT) Received: by mail-wi0-f171.google.com with SMTP id hm2so995111wib.10 for <6tsch@ietf.org>; Fri, 06 Sep 2013 07:50:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=l4QxYC3bgbcBeRpMqYN0CFEkJhamo3i/ynYQZEPY8k8=; b=EeHB8hf5u+vosPxLOq08y7LORoVDY+Y78kQ45rf17MiOkQYzyFNeMa7TB9U0uq99t5 98maxJiUI/n2T0C4DngtUzQVNARge/RF0sgJzmqD+vy7B2ddLVVe1YEltADJ4SoKedN3 FDG3nFbZ9CkLn4urC1Z/xKV8fTyG03Rh0oWS/isKn1WzzEEa+pIwMLugjdZVM6kL+mrq C6UJaA9Y3/XF7By5S7lC38n2N2YnHpgyJQ7OAk50RjNvE3NGiv7jE5eFz5twauS7U4kK O1NlZJhtv6R7ovv4Rt6lBqGfqsqLDMq2GFF6FE5iC12dvyxIReItypAcwxvZ43ekgu0g UuAQ== X-Gm-Message-State: ALoCoQmmwq45sWt5Aqf6umn5TE7zuv8atd5R1OJ9DRaF4SqGOggrYVyQjUA6qHNP9wjpI34gzvOS MIME-Version: 1.0 X-Received: by 10.194.79.33 with SMTP id g1mr34204wjx.79.1378479004350; Fri, 06 Sep 2013 07:50:04 -0700 (PDT) Received: by 10.194.122.103 with HTTP; Fri, 6 Sep 2013 07:50:04 -0700 (PDT) In-Reply-To: References: Date: Fri, 6 Sep 2013 10:50:04 -0400 Message-ID: From: "Prof. Diego Dujovne" To: Qin Wang Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org>, Xavi Vilajosana Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2013 14:50:10 -0000 Qin, I agree with the MIB approach. It would provide more scalability for future versions too. I think the implementation cost and the added processing time is worth it. Diego 2013/9/6 Qin Wang : > Hi Xavi and Thomas, > > I agree Xavi's the list. I also agree that it is very important to have a > generic mechanism whereby the PCE can turn fields on/off, or triggered > independently. I guess "Option Flag" is used to turn on/off. Correct? > > Furthermore, I would like suggest to think the list as MIB, and leave Rep= ort > Packet configurable. For example, in the following list > > -ID > -AVG RSSI in a running window > -Latest RSSI > -AVG LQI in a running window [optional] > -Latest LQI [optional] > -Num TX packets (option in case there is communication with that neighbo= r) > -Num ACK packets (option in case there is communication with that neighb= or) > -Num RX packets (option in case there is communication with that neighbo= r) > -Last ASN when it heart about that neighbor > -Bundle: Num links in the Schedule to that neighbor > -PDR per link [Optional -- or maybe best and worst PDR only] > > -Option Flag (weather there are optional TLV fields on that category) > +(TLV objects)* > > A specific PCE is not interested in Latest RSSI, then the PCE can use Act= ion > Flow to configure its own Report Packet without the field, and don't need > the "Option Flag" in every report packet. > > What do you think? > > Qin > > > On Fri, Sep 6, 2013 at 7:18 AM, Thomas Watteyne > wrote: >> >> Fantastic. I guess something like that could work. >> Thomas >> >> >> On Thu, Sep 5, 2013 at 4:17 PM, Xavier Vilajosana Guillen >> wrote: >>> >>> agreed! >>> So the fields become: >>> >>> >>> For each known neighbor: >>> -ID >>> -AVG RSSI in a running window >>> -Latest RSSI >>> -AVG LQI in a running window [optional] >>> -Latest LQI [optional] >>> -Num TX packets (option in case there is communication with that >>> neighbor) >>> -Num ACK packets (option in case there is communication with that >>> neighbor) >>> -Num RX packets (option in case there is communication with that >>> neighbor) >>> -Last ASN when it heart about that neighbor >>> -Bundle: Num links in the Schedule to that neighbor >>> -PDR per link [Optional -- or maybe best and worst PDR only] >>> >>> -Option Flag (weather there are optional TLV fields on that category) >>> +(TLV objects)* >>> >>> -For each Queue: >>> - Avg Queue length in a running window >>> - Max Queue length in a running window (peak) >>> - Current Queue length (?) >>> - ASN of the oldest packet in the QUEUE? >>> -Option Flag (weather there are optional TLV fields on that categor= y) >>> +(TLV objects)* >>> >>> -Time source parent >>> -ID >>> -Avg clock drift (correction done) in a running window >>> -Latest clock correction >>> -Parent changes (counter of how many times I changed my time source >>> parent) >>> -Option Flag (weather there are optional TLV fields on that categor= y) >>> +(TLV objects)* >>> >>> -Option Flag (weather there are optional TLV fields in other categories= ) >>> +(TLV objects)* >>> >>> as regards to this: >>> >>> "Finally, do you envision a generic mechanism whereby the PCE can turn >>> fields on/off, or triggered independently?" >>> >>> I see it as CoAP Options, where a set of bytes can be used as "clever >>> bitmap" to tell what options are there, the parsing will decode option = by >>> option and will read the fields. In that way any combination of fields = is >>> supported. >>> >>> would that work? >>> X >>> >>> >>> On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne >>> wrote: >>>> >>>> Xavi, >>>> >>>> Fantastic! >>>> >>>> I believe PDR for each link might be too long to fit in a packet. Whil= e >>>> the mote will most likely keep that information, we could move that to= the >>>> query flow, i.e. it is available to the PCE on-demand. >>>> >>>> Would you agree that the number of links in a bundle belongs to the >>>> neighbor? Of maybe we want a "bundle" category? >>>> >>>> In queuing, it might be interesting to see the age of the different >>>> packets, to be able to monitor latency. >>>> >>>> About LQI, there is no general consensus among vendors on what the >>>> definition is, or how exactly it is calculated. I would make it option= al. >>>> >>>> Also, it might be good to be able to add arbitrary fields to each >>>> category: neighbor, queue, time source neighbor. >>>> >>>> Finally, do you envision a generic mechanism whereby the PCE can turn >>>> fields on/off, or triggered independently? >>>> >>>> Thomas >>>> >>>> >>>> On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen >>>> wrote: >>>>> >>>>> Hi Thomas, Diego, >>>>> >>>>> I agree that LQI should be there as well. I update here the list with >>>>> Thomas suggestions. >>>>> >>>>> For each known neighbor: >>>>> -ID >>>>> -AVG RSSI in a running window >>>>> -Latest RSSI >>>>> -AVG LQI in a running window >>>>> -Latest LQI >>>>> -Num TX packets (option in case there is communication with that >>>>> neighbor) >>>>> -Num ACK packets (option in case there is communication with that >>>>> neighbor) >>>>> -Num RX packets (option in case there is communication with that >>>>> neighbor) >>>>> -Last ASN when it heart about that neighbor >>>>> >>>>> Other fields >>>>> -Num links in the Schedule to that neighbor >>>>> -For each link PDR >>>>> -For each Queue: >>>>> - Avg Queue length in a running window >>>>> - Max Queue length in a running window (peak) >>>>> - Current Queue length (?) >>>>> -Time source parent >>>>> -ID >>>>> -Avg clock drift (correction done) in a running window >>>>> -Latest clock correction >>>>> -Parent changes (counter of how many times I changed my time sour= ce >>>>> parent) >>>>> >>>>> -Option Flag (weather there are optional TLV fields) >>>>> +(TLV objects)* >>>>> >>>>> >>>>> Hope this makes sense. >>>>> cheers! >>>>> Xavi >>>>> >>>>> >>>>> On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne >>>>> wrote: >>>>>> >>>>>> [renamed thread] >>>>>> >>>>>> Xavi, >>>>>> >>>>>> A few thoughts: >>>>>> - the counters (numTx, etc) will only be present for neighbors the >>>>>> node has communicate with, so they should be optional in the packet. >>>>>> - you have focused on the topological information (which I think is >>>>>> the right one). It might be useful to gather other data related to >>>>>> synchronization or queuing. >>>>>> - I couldn't agree more with your suggestion to make it extensible. >>>>>> This does mean that we will need to state somewhere that a device ne= ed to >>>>>> ignore silently fields it does not understand. >>>>>> >>>>>> Thomas >>>>>> >>>>>> On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen >>>>>> wrote: >>>>>>> >>>>>>> Hello, I guess that flows are getting defined and I started to thin= k >>>>>>> on the contents of the messages on that flows. Not sure if this is = the right >>>>>>> time or I am going way far.. >>>>>>> >>>>>>> According to the previous discussion I assume that the five flows >>>>>>> are: >>>>>>> >>>>>>> ME-6TOP - Query Flow >>>>>>> ME-6TOP - Action Flow >>>>>>> >>>>>>> 6TOP - ME - Report Flow >>>>>>> 6TOP - ME - Event Flow >>>>>>> 6TOP - ME - Request BW Flow >>>>>>> >>>>>>> I'd like to start defining the content of the messages in the Repor= t >>>>>>> Flow: >>>>>>> >>>>>>> The Report Flow: has to deal with the information that a node knows >>>>>>> and has to be sent to the ME so the ME can compute the schedule amo= ng >>>>>>> others. Here I list the information that we can know in a mote and= can be >>>>>>> used at the ME to compute the schedule (complete please if I miss s= omething) >>>>>>> >>>>>>> For each known neighbor: >>>>>>> -ID >>>>>>> -AVG RSSI in a running window >>>>>>> -Latest RSSI >>>>>>> -Num TX packets >>>>>>> -Num ACK packets >>>>>>> -Num RX packets >>>>>>> -Last ASN when it heart about that neighbor >>>>>>> >>>>>>> Other fields >>>>>>> -Num links in the Schedule to that neighbor >>>>>>> -For each link PDR >>>>>>> >>>>>>> >>>>>>> Then we need to have some TLV like objects that can be used for >>>>>>> ad-hoc/naive/other extensions of the reporting process. In that way= we don't >>>>>>> constraint the implementation of the scheduling alg. to that inform= ation. >>>>>>> >>>>>>> what do you think? >>>>>>> X >>>>>>> >>>>>>> >>>>>>> On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang >>>>>>> wrote: >>>>>>>> >>>>>>>> Hi all, >>>>>>>> >>>>>>>> In this thread, we will continue the discussion about Confirmation >>>>>>>> message. Here is some background information. >>>>>>>> >>>>>>>> Context: e.g. >>>>>>>> - node sends a report and want to know if the report is >>>>>>>> accepted., >>>>>>>> - ME sends a action request and want to know if/when the actio= n >>>>>>>> taken. >>>>>>>> Options: >>>>>>>> (1) Nothing >>>>>>>> (2) Rely on transport mechanism (e.g. confirmable CoAP message) >>>>>>>> (3) App-level ACK type >>>>>>>> (4) Use different flow (i.e. action flow) >>>>>>>> >>>>>>>> IMHO, different control flow may have different requirement for >>>>>>>> confirmation message. >>>>>>>> (1) Action Flow, needs a App-level confirmation, like Succ/Fai= l >>>>>>>> (2) Query Flow, automatically has the confirmation, i.e. the >>>>>>>> message packet corresponding to a specific query. >>>>>>>> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I >>>>>>>> prefer option (1) and (3), i.e. the confirmation message is an opt= ion, but >>>>>>>> if a confirmation message is needed, it should be App-level Ack, i= nstead of >>>>>>>> transport layer confirmation, which will give 6top more flexibilit= y. >>>>>>>> >>>>>>>> What do you think? >>>>>>>> >>>>>>>> Thanks >>>>>>>> Qin >>>>>>>> >>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> 6tsch mailing list >>>>>>>> 6tsch@ietf.org >>>>>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>>>>> >>>>>>> >>>>>>> >>>>>>> _______________________________________________ >>>>>>> 6tsch mailing list >>>>>>> 6tsch@ietf.org >>>>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>>>> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> 6tsch mailing list >>>>>> 6tsch@ietf.org >>>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>>> >>>>> >>>> >>>> >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch >>>> >>> >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > --=20 DIEGO DUJOVNE Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl (56 2) 676 8125 From pthubert@cisco.com Fri Sep 6 08:51:22 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E804711E8122 for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 08:51:21 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.498 X-Spam-Level: X-Spam-Status: No, score=-10.498 tagged_above=-999 required=5 tests=[AWL=0.100, BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id kS42UC0X+dHK for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 08:51:17 -0700 (PDT) Received: from rcdn-iport-2.cisco.com (rcdn-iport-2.cisco.com [173.37.86.73]) by ietfa.amsl.com (Postfix) with ESMTP id 5FB6811E81B2 for <6tsch@ietf.org>; Fri, 6 Sep 2013 08:51:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=39586; q=dns/txt; s=iport; t=1378482676; x=1379692276; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=asT0nxwPRnSS8Ssuc/NByuazkq2OQFdtDT7s9msobKM=; b=b813i/riJcmlK9dIItrcQpMw48+Im7odv+pAMox6G+ZGYjfd8Ob8tqQG +tk23Z9iNtyhXOIV7yPA1UiHRZYO7ZLlaW6Aqeo5W42fjNKrl1OYShz0y ukhF8J1D1Vudwo4WLu4tsqerCtD+hmZFnOaSJTvVbGR8M4ai/e4vCdNXd E=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AigFAMX5KVKtJV2Z/2dsb2JhbABbDoI1RDVRwVWBJBZ0giQBAQEEAQEBKkELEAIBCBEEAQELFgEGBycLFAkIAgQBDQUIh3oMvX4Ej0stBAYBBoMXgQADhUukEIJhP4Iq X-IronPort-AV: E=Sophos;i="4.90,855,1371081600"; d="scan'208,217";a="256502104" Received: from rcdn-core-2.cisco.com ([173.37.93.153]) by rcdn-iport-2.cisco.com with ESMTP; 06 Sep 2013 15:51:09 +0000 Received: from xhc-rcd-x12.cisco.com (xhc-rcd-x12.cisco.com [173.37.183.86]) by rcdn-core-2.cisco.com (8.14.5/8.14.5) with ESMTP id r86Fp8g6027483 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 6 Sep 2013 15:51:08 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-rcd-x12.cisco.com ([173.37.183.86]) with mapi id 14.02.0318.004; Fri, 6 Sep 2013 10:51:08 -0500 From: "Pascal Thubert (pthubert)" To: "xvilajosana@eecs.berkeley.edu" , "Thomas Watteyne" Thread-Topic: [6tsch] report flow contents Thread-Index: AQHOqmeXwGSOL2GQs06/pxHNNYU8RZm34IwAgAA2pACAAAP0gIAAwPaA Date: Fri, 6 Sep 2013 15:51:08 +0000 Deferred-Delivery: Fri, 6 Sep 2013 15:51:00 +0000 Message-ID: References: In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.61.64.110] Content-Type: multipart/alternative; boundary="_000_E045AECD98228444A58C61C200AE1BD84145CB61xmbrcdx01ciscoc_" MIME-Version: 1.0 Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2013 15:51:22 -0000 --_000_E045AECD98228444A58C61C200AE1BD84145CB61xmbrcdx01ciscoc_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hello Xavi: At the call I mentioned we could use info on tracks and cells as well, prob= ably on demand from the PCE. For instance, the PCE could observe energy levels over some cells for a wh= ile to make sure they are clean. What do you think? Pascal From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of X= avier Vilajosana Guillen Sent: vendredi 6 septembre 2013 01:17 To: Thomas Watteyne Cc: 6tsch@ietf.org Subject: Re: [6tsch] report flow contents agreed! So the fields become: For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -AVG LQI in a running window [optional] -Latest LQI [optional] -Num TX packets (option in case there is communication with that neighbor) -Num ACK packets (option in case there is communication with that neighbor= ) -Num RX packets (option in case there is communication with that neighbor) -Last ASN when it heart about that neighbor -Bundle: Num links in the Schedule to that neighbor -PDR per link [Optional -- or maybe best and worst PDR only] -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -For each Queue: - Avg Queue length in a running window - Max Queue length in a running window (peak) - Current Queue length (?) - ASN of the oldest packet in the QUEUE? -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -Time source parent -ID -Avg clock drift (correction done) in a running window -Latest clock correction -Parent changes (counter of how many times I changed my time source par= ent) -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -Option Flag (weather there are optional TLV fields in other categories) +(TLV objects)* as regards to this: "Finally, do you envision a generic mechanism whereby the PCE can turn fiel= ds on/off, or triggered independently?" I see it as CoAP Options, where a set of bytes can be used as "clever bitma= p" to tell what options are there, the parsing will decode option by option= and will read the fields. In that way any combination of fields is support= ed. would that work? X On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne > wrote: Xavi, Fantastic! I believe PDR for each link might be too long to fit in a packet. While the= mote will most likely keep that information, we could move that to the que= ry flow, i.e. it is available to the PCE on-demand. Would you agree that the number of links in a bundle belongs to the neighbo= r? Of maybe we want a "bundle" category? In queuing, it might be interesting to see the age of the different packets= , to be able to monitor latency. About LQI, there is no general consensus among vendors on what the definiti= on is, or how exactly it is calculated. I would make it optional. Also, it might be good to be able to add arbitrary fields to each category:= neighbor, queue, time source neighbor. Finally, do you envision a generic mechanism whereby the PCE can turn field= s on/off, or triggered independently? Thomas On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen > wrote: Hi Thomas, Diego, I agree that LQI should be there as well. I update here the list with Thoma= s suggestions. For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -AVG LQI in a running window -Latest LQI -Num TX packets (option in case there is communication with that neighbor) -Num ACK packets (option in case there is communication with that neighbor= ) -Num RX packets (option in case there is communication with that neighbor) -Last ASN when it heart about that neighbor Other fields -Num links in the Schedule to that neighbor -For each link PDR -For each Queue: - Avg Queue length in a running window - Max Queue length in a running window (peak) - Current Queue length (?) -Time source parent -ID -Avg clock drift (correction done) in a running window -Latest clock correction -Parent changes (counter of how many times I changed my time source par= ent) -Option Flag (weather there are optional TLV fields) +(TLV objects)* Hope this makes sense. cheers! Xavi On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne > wrote: [renamed thread] Xavi, A few thoughts: - the counters (numTx, etc) will only be present for neighbors the node has= communicate with, so they should be optional in the packet. - you have focused on the topological information (which I think is the rig= ht one). It might be useful to gather other data related to synchronization= or queuing. - I couldn't agree more with your suggestion to make it extensible. This do= es mean that we will need to state somewhere that a device need to ignore s= ilently fields it does not understand. Thomas On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen > wrote: Hello, I guess that flows are getting defined and I started to think on the= contents of the messages on that flows. Not sure if this is the right time= or I am going way far.. According to the previous discussion I assume that the five flows are: ME-6TOP - Query Flow ME-6TOP - Action Flow 6TOP - ME - Report Flow 6TOP - ME - Event Flow 6TOP - ME - Request BW Flow I'd like to start defining the content of the messages in the Report Flow: The Report Flow: has to deal with the information that a node knows and has= to be sent to the ME so the ME can compute the schedule among others. Here= I list the information that we can know in a mote and can be used at the = ME to compute the schedule (complete please if I miss something) For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -Num TX packets -Num ACK packets -Num RX packets -Last ASN when it heart about that neighbor Other fields -Num links in the Schedule to that neighbor -For each link PDR Then we need to have some TLV like objects that can be used for ad-hoc/naiv= e/other extensions of the reporting process. In that way we don't constrain= t the implementation of the scheduling alg. to that information. what do you think? X On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang > wrote: Hi all, In this thread, we will continue the discussion about Confirmation message.= Here is some background information. Context: e.g. - node sends a report and want to know if the report is accepted., - ME sends a action request and want to know if/when the action taken. Options: (1) Nothing (2) Rely on transport mechanism (e.g. confirmable CoAP message) (3) App-level ACK type (4) Use different flow (i.e. action flow) IMHO, different control flow may have different requirement for confirmatio= n message. (1) Action Flow, needs a App-level confirmation, like Succ/Fail (2) Query Flow, automatically has the confirmation, i.e. the message pa= cket corresponding to a specific query. (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer opt= ion (1) and (3), i.e. the confirmation message is an option, but if a confi= rmation message is needed, it should be App-level Ack, instead of transport= layer confirmation, which will give 6top more flexibility. What do you think? Thanks Qin _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_E045AECD98228444A58C61C200AE1BD84145CB61xmbrcdx01ciscoc_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hello Xavi:

 <= /p>

At the call I mentioned w= e could use info on tracks and cells as well, probably on demand from the P= CE.

For instance, the PCE cou= ld observe energy levels over some cells for  a while to make sure the= y are clean.

 <= /p>

What do you think?

Pascal

 <= /p>

From: 6tsch-bo= unces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
Sent: vendredi 6 septembre 2013 01:17
To: Thomas Watteyne
Cc: 6tsch@ietf.org
Subject: Re: [6tsch] report flow contents

 

agreed!

So the fields become:

 

 

For each known neighbor:=

 -ID

 -AVG RSSI in a running window

 -Latest RSSI

 -AVG LQI in a running window [option= al]

 -Latest LQI [optional]

 -Num TX packets (option in case ther= e is communication with that neighbor)

 -Num ACK packets (option in case the= re is communication with that neighbor)

 -Num RX packets (option in case ther= e is communication with that neighbor)

 -Last ASN when it heart about that n= eighbor 

 -Bundle: Num links in the Schedule t= o that neighbor

      -PDR per link [Option= al -- or maybe best and worst PDR only]

 

 -Option Flag (weather = there are optional TLV fields on that category)

   +(TLV objec= ts)* 

 

 -For each Queue:

    - Avg Queue length in a runn= ing window

    - Max Queue length in a runn= ing window (peak)

    - Current Queue length (?)

    - ASN of the oldest packet i= n the QUEUE?

    -Option Flag (weather there = are optional TLV fields on that category)

        +(TLV obje= cts)* 

 

-Time source parent

    -ID

    -Avg clock drift (correction= done) in a running window

    -Latest clock correction

    -Parent changes (counter of = how many times I changed my time source parent)

    -Option Flag (weather there = are optional TLV fields on that category)

    +(TLV objects)* 

 

-Option Flag (weather there are optional T= LV fields in other categories)

   +(TLV objects)* 

 

as regards to this:

 

"Finally, do you envision a generic m= echanism whereby the PCE can turn fields on/off, or triggered independently= ?"

 

I see it as CoAP Options, where a set of bytes can be used= as "clever bitmap" to tell what options are there, the parsing w= ill decode option by option and will read the fields. In that way any combination of fields is supported.

 

would that work?

X

 

On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

Xavi,

 

Fantastic!

 

I believe PDR for each link might be too long to fit= in a packet. While the mote will most likely keep that information, we cou= ld move that to the query flow, i.e. it is available to the PCE on-demand.<= o:p>

 

Would you agree that the number of links in a bundle= belongs to the neighbor? Of maybe we want a "bundle" category?

 

In queuing, it might be interesting to see the age o= f the different packets, to be able to monitor latency.

 

About LQI, there is no general consensus among vendo= rs on what the definition is, or how exactly it is calculated. I would make= it optional.

 

Also, it might be good to be able to add arbitrary f= ields to each category: neighbor, queue, time source neighbor.

 

Finally, do you envision a generic mechanism whereby= the PCE can turn fields on/off, or triggered independently?

 

Thomas

 

On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:

Hi Thomas, Diego,

 

I agree that LQI should be there as well. I update h= ere the list with Thomas suggestions. 

 

For each known neighbor:=

 -ID

 -AVG RSSI in a running window

 -Latest RSSI

 -AVG LQI in a running window

 -Latest LQI

 -Num TX packets (option in case ther= e is communication with that neighbor)

 -Num ACK packets (option in case the= re is communication with that neighbor)

 -Num RX packets (option in case ther= e is communication with that neighbor)

 -Last ASN when it heart about that n= eighbor 

 

Other fields

 -Num links in the Schedule to that n= eighbor

    -For each link PDR

 -For each Queue:

    - Avg Queue length in a running window=

    - Max Queue length in a running window= (peak)

    - Current Queue length (?)<= /p>

-Time source parent

    -ID

    -Avg clock drift (correction done) in = a running window

    -Latest clock correction

    -Parent changes (counter of how many t= imes I changed my time source parent)

 

-Option Flag (weather there are optional TLV fields)=

   +(TLV objects)* 

 

 

Hope this makes sense.

cheers!
Xavi

 

On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

[renamed thread]=

 

Xavi,

 

A few thoughts:

- the counters (numTx, etc) will only be = present for neighbors the node has communicate with, so they should be opti= onal in the packet.

- you have focused on the topological inf= ormation (which I think is the right one). It might be useful to gather oth= er data related to synchronization or queuing.

- I couldn't agree more with your suggest= ion to make it extensible. This does mean that we will need to state somewh= ere that a device need to ignore silently fields it does not understand.

 

Thomas

 

On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:

Hello, I guess that flows are getting defined and I = started to think on the contents of the messages on that flows. Not sure if= this is the right time or I am going way far..

 

According to the previous discussion I assume that t= he five flows are:

 

ME-6TOP - Query Flow

ME-6TOP - Action Flow

 

6TOP - ME - Report Flow

6TOP - ME - Event Flow

6TOP - ME - Request BW Flow

 

I'd like to start defining the content of the messag= es in the Report Flow:

 

The Report Flow: has to deal with the information th= at a node knows and has to be sent to the ME so the ME can compute the sche= dule among others. Here I list  the information that we can know in a = mote and can be used at the ME to compute the schedule (complete please if I miss something)

 

For each known neighbor:

 -ID

 -AVG RSSI in a running window

 -Latest RSSI

 -Num TX packets

 -Num ACK packets

 -Num RX packets

 -Last ASN when it heart about that neighbor&nb= sp;

 

Other fields

 -Num links in the Schedule to that neighbor

    -For each link PDR

 

 

Then we need to have some TLV like objects that can = be used for ad-hoc/naive/other extensions of the reporting process. In that= way we don't constraint the implementation of the scheduling alg. to that = information.

 

what do you think?

X

 

On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi all,

 

In this thread, we = will continue the discussion about Confirmation message. Here is some backg= round information.

 

Context: e.g.

    - nod= e sends a report and want to know if the report is accepted., <= o:p>

    - ME = sends a action request and want to know if/when the action taken.

Options:

   (1) No= thing

   (2) Re= ly on transport mechanism (e.g. confirmable CoAP message)=

   (3) Ap= p-level ACK type

   (4) Us= e different flow (i.e. action flow)

 

IMHO, different con= trol flow may have different requirement for confirmation message.

    (1) A= ction Flow, needs a App-level confirmation, like Succ/Fail

    (2) Q= uery Flow, automatically has the confirmation, i.e. the message packet corr= esponding to a specific query.

    (3) R= eport Flow and Event Flow, option (1)-(3) are OK, but I prefer option (1) a= nd (3), i.e. the confirmation message is an option, but if a confirmation m= essage is needed, it should be App-level Ack, instead of transport layer confirmation, which will give 6top more flexibi= lity.

 

What do you think?<= /span>

 

Thanks<= /o:p>

Qin

 = ;   

 

_____________________= __________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 

 


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 

--_000_E045AECD98228444A58C61C200AE1BD84145CB61xmbrcdx01ciscoc_-- From twatteyne@gmail.com Fri Sep 6 09:18:03 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1E6C511E82C8 for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 09:18:03 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.886 X-Spam-Level: X-Spam-Status: No, score=-1.886 tagged_above=-999 required=5 tests=[AWL=0.091, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id glb-bWmsIP-b for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 09:18:02 -0700 (PDT) Received: from mail-pb0-x22d.google.com (mail-pb0-x22d.google.com [IPv6:2607:f8b0:400e:c01::22d]) by ietfa.amsl.com (Postfix) with ESMTP id B2C0F11E82B1 for <6tsch@ietf.org>; Fri, 6 Sep 2013 09:18:02 -0700 (PDT) Received: by mail-pb0-f45.google.com with SMTP id mc17so3397820pbc.18 for <6tsch@ietf.org>; Fri, 06 Sep 2013 09:18:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=CZfgbagoJXX97WPFwGy9KI3T/6ab9KYL8ID9/gkP/lk=; b=mWJ5ZtQR/nxbC9EIDYpO8KVzi2ZT3VWJ6l/ZNzj3OXcLmHhi08rUn64dKJr53Yjx9z kZg4tamkf9IeRquYuCCNAbOEuLJuInRuiJMd1wdl2+x5xxt4iZVBW8nU0iXVha2G8f7k A43htphN/6cy5KWG+V1JHlC1v01dS4wLde9a8DpjT4Piw9131b0Oy9uAgj3NGcIqoUeP +vqO3TiLeccOoAM5MVI7lQy6BCe+6KylguCHenLQiAokL/okLTRbYgODYeU/Q5BJfxJ7 VslXE6nn7+Zn7ayTgqCt0TNdYFEixrkcd+egBM0ziDoYEbvxzb8djx/Iw6wXR+aS/Vg/ m9cg== X-Received: by 10.66.142.107 with SMTP id rv11mr5007072pab.17.1378484282476; Fri, 06 Sep 2013 09:18:02 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Fri, 6 Sep 2013 09:17:42 -0700 (PDT) From: Thomas Watteyne Date: Fri, 6 Sep 2013 09:17:42 -0700 X-Google-Sender-Auth: 6hrGaOHUkkTnU2mACoLsWWYGmWY Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=001a11331e46fc4f5604e5b961a7 Subject: [6tsch] Zero Objective Function discussion X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2013 16:18:03 -0000 --001a11331e46fc4f5604e5b961a7 Content-Type: text/plain; charset=ISO-8859-1 Pascal, Thank you for presenting the OF0 discussion on the call today. I have a quick question about the depth penalty. In your example on the call, you used b=0. Could you detail a case where using a value of b different than 0 is applicable? Also, do you think there is an alternative to defining our own computation of Sp? Certainly in the minimal draft, it would be good if we could use a OF as-is, without introducing anything new. Thomas --001a11331e46fc4f5604e5b961a7 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Pascal,

Thank you for presenting the OF= 0 discussion on the call today. I have a quick question about the depth pen= alty. In your example on the call, you used b=3D0. Could you detail a case = where using a value of b different than 0 is applicable?

Also, do you think there is an alternative to defining = our own computation of Sp? Certainly in the minimal draft, it would be good= if we could use a OF as-is, without introducing anything new.

Thomas
--001a11331e46fc4f5604e5b961a7-- From twatteyne@gmail.com Fri Sep 6 10:05:05 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id EECE121E80D4 for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 10:05:05 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.888 X-Spam-Level: X-Spam-Status: No, score=-1.888 tagged_above=-999 required=5 tests=[AWL=0.089, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0Ivon8K48Q5v for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 10:05:04 -0700 (PDT) Received: from mail-pd0-x236.google.com (mail-pd0-x236.google.com [IPv6:2607:f8b0:400e:c02::236]) by ietfa.amsl.com (Postfix) with ESMTP id 8BC6821E80CE for <6tsch@ietf.org>; Fri, 6 Sep 2013 10:05:04 -0700 (PDT) Received: by mail-pd0-f182.google.com with SMTP id r10so3503644pdi.13 for <6tsch@ietf.org>; Fri, 06 Sep 2013 10:05:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=vmgcU3mmx6E6MN4dn2wOn/DrvV0Y8mOpqKl8aBnm1Ts=; b=AKWlIHCJavd39iBzOAbZdVLM9V8JtTvUuQI+Vlwm1EKMP92+tCMRyoZX0tTXsgIjv0 fhi1HWkgV4SLmndA7chM9tzru9pk80+R56gGGWil3gKwnLefGKYcX/hsez+PaYXBwqLT Kd0haoaVqZ5Wrn63x1MTt/Z1rFbuc5Z41u2u2FlxoHq8dPEIebhGpdfKI+wAQe1jv7Hf NycjVHLkOLjzpVqLq8wLga/gppNEXcsf7FJ+27uLlZuuwZYP7yJSvFkJFBcYoIjKGXxx +wuzzvUQYoAmgaVhKmzjDARxKGi6x6lG1GlbGWPKpwYDoo6H0qnMO4GfqQrLWj3jyCEw Teug== X-Received: by 10.66.121.201 with SMTP id lm9mr5152264pab.80.1378487104251; Fri, 06 Sep 2013 10:05:04 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Fri, 6 Sep 2013 10:04:44 -0700 (PDT) From: Thomas Watteyne Date: Fri, 6 Sep 2013 10:04:44 -0700 X-Google-Sender-Auth: uiI1efoHvLLzA7nEBvZ_VJn7E9E Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b2e4ca42d30cf04e5ba0ae2 Subject: [6tsch] minutes webex 06 September 2013 X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2013 17:05:06 -0000 --047d7b2e4ca42d30cf04e5ba0ae2 Content-Type: text/plain; charset=ISO-8859-1 All, You will find the minutes of today's webex below. FYI, all the minutes and slides are archived a https://bitbucket.org/6tsch/meetings/. Thanks to Xavi and Dominique for taking notes! As usual, fix anything we might have missed directly in the e-mail and reply. We will approve and adopt the minutes at the next call. Thomas --- Minutes Webex 6 September 2013, 6TiSCH group Note: timestamps in PDT. Taking notes *(using Etherpad)* 1. Xavi Vilajosana 2. Dominique Barthel 3. Thomas Watteyne Present *(alphabetically)* 1. Cedric Adjh 2. Diego Dujovne 3. Dominique Barthel 4. Geraldine Texier 5. Maria Rita Palattella 6. Pascal Thubert 7. Patrick Wetterwald 8. Pouria Zand 9. Qin Wang 10. Raghuram Sudhaakar 11. Thomas Watteyne 12. Tom Phinney 13. Xavi Vilajosana Recording - Webex recording (audio+slides,streaming) - https://cisco.webex.com/ciscosales/lsr.php?AT=pb&SP=MC&rID=71216747&rKey=96640b930d5e441d *[65min]* Slides - slides_130906_webex.ppt: slides shared during the call Action items - *Pascal* to add description of flows to architecture draft. - *Raghuram* and *Xavi* to prepare overview slides of the CoAP. To be presented at call in 1-2 weeks. - *Pascal* to add Track and Cells to the list of items for a node to report to the PCE using report flow, on the ML. - *Pouria* to identify the equivalent information sent by a WirelessHART and ISA100.11a node to the manager. - *Thomas* to contact IEEE802.15.4e authors about EB priority and whether the step for EB priority MUST be +1 or can be something else, e.g +Step_Of_Rank from RPL. - All to ask about RPL OF0 presentation by Pascal on ML. Agenda - Approval minutes & agenda bashing *[3min]* - charter update - Flow identification *[40min]* - 5 flows? Identify the tiers (ME in device, PCE, NME) - CoAP mechanisms we could reuse - Discussion commands and information exchanged in flows (report) - Using RPL in minimal 6TiSCH case *[15min]* - Rank, Join Priority and flow label - RPL and OF0 - Impact of routing loops on synchronization - AOB *[2min]* Minutes - *[08.05]* Meeting starts Recording starts - *[08.06]* Approval minutes & agenda bashing *[3min]* - approval minutes last minutes No concerns raised. Minutes approved. - approval agenda No concerns raised. Agenda approved. - charter update - Submitted to IESG Thursday on 9/5/13 - Talk by Thomas about 6TiSCH activity at senZations'13 - *[08.10]* Flow identification *[40min]* - 5 flows? Identify the tiers (ME in device, PCE, NME) - Request Flow: Internet to PCE or Mesh to PCE - Action Flow: PCE --> Mesh - Report Flow: Mesh--> PCE - Event Flow: Node notifies to the PCE - Query Flow: PCE asks a node - Acknowledgements of flows: - Leave the ACKs to the transport mechanism. For example, CoAP provides the optional mechanism of confirmable messages. - *[Qin]* ACK from transport layer is part of the confirmation. Not all of the confirmation. We use ACK from transport layer if it can be used. If we need additional confirmation, this can be added from the applications layer. - *[Thomas]* 2 aspects: - ACK is to confirm that the message has been received. - Application-level response us used to provide a response payload, e.g track confirmation, etc. - ACKs are optional on the transport layer. - Next steps: add to architecture draft? - High level overview of the flows go to the architecture. - *[Maria Rita]* Full details about the bits-and-bytes should go to the flows description draft. - *[Qin]* Question about the picture: it is more focused to the centralized case. In a distributed case the flows do not work. - *[Pascal]* The current charter does not address 6top to 6top. - *[Xavi]* We can map decentralized flows to centralized in very brief discussion on the ML to see if there is some immediate mapping. - Volunteer to add description of flows to architecture draft? Action item: Pascal to add description of flows to architecture draft. - CoAP mechanisms we could reuse - CoAP provides mechanisms we could take advantage of. - Resources - methods (GET/PUT/PUSH) - confirmable messages - Volunteers to prepare an overview of the CoAP in 1-2 weeks? Action item: Raghuram and Xavi to prepare overview slides of the CoAP. To be presented at call in 1-2 weeks. - Discussion commands and information exchanged in flows (report) - Sent by the node to the PCE. - Gives information about how the node is doing. - Go through the proposed fields on the ML after some discussion: - For each neighbor: ID, RSSI, LQI, Counters, Bundle information, statistics about the link. - Queue information - Time source parents. - Not clear yet as to how to get at all these metrics. - How the PCE can configure the mote to relay only some of this information, what the PCE wants to know and when. Ongoing discussion on the ML. - *[Pascal]* Bundle allocation is not redundant as when we use RPL-based allocation the bundle is built dynamically. - *[Pascal]* Tracks and cell information. Ask for devices to report about a particular track. - *[Pascal]* Monitor cells that are not being used to know if they are good. Action item: Pascal to add Track and Cells to the list of items for a node to report to the PCE using report flow, on the ML. - *[Diego]* It would be interesting to get the average RSSI/LQI per channel instead of the average amongst all. Requires node to keep per-channel measurements of RSSI/LQI. - *[Thomas]* Important to think about the mechanism to allow a subset of this information to be configured. - Volunteers to identify the equivalent information sent by a WirelessHART and ISA100.11a node to the manager? Action item: Pouria to identify the equivalent information sent by a WirelessHART and ISA100.11a node to the manager. - "Timeslot Management Methods and Formats" draft: Let's wait 1-2 weeks before starting a skeleton. - *[08.51]* Using RPL in minimal 6TiSCH case [15min] - Rank, Join Priority and flow label - Network bootstrap and synchronization. - A joining node listens for EBs. Keeps listening until it hears multiple. Based on EBs, picks best temporary parent neighbor. - Keeps synchronized to this temporary parent until it gets RPL DIOs. Once it acquires a RPL rank, starts sending EBs. RPL rank used as EB join priority. - The node keeps silent until it has a rank and selected preferrred parent. - *[Qin]* RPL rank as join priority, is a field of 15.4e, every 15.4e implementation will implement that part, 6top will override this field. Breaks 15.4e? Action item: Thomas to contact IEEE802.15.4e authors about EB priority and whether the step for EB priority MUST be +1 or can be something else, e.g +Step_Of_Rank from RPL. Note: by lack of time, we will skip last slides. - RPL and OF0 *[Pascal]* - Zero OF, uses basic information from RPL - Increments the rank at each hop independently of a very detailed metric. - Linear categories of rank between 1 or 9. - How do we compute the step if we are using ETX. --> use a linear approach. Action item: All to ask about RPL OF0 presentation by Pascal on ML. - *[09.11]* AOB No other business raised. - *[09.12]* Meeting ends --047d7b2e4ca42d30cf04e5ba0ae2 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
All,

You will find the minutes of today's webex below.

=
FYI, all the minutes and slides are archived a=A0https://bitbucket.org/6tsch/meet= ings/.

Thanks to Xavi and Dominique for taking notes!
<= div style=3D"color:rgb(0,0,0);font-family:'Times New Roman';font-si= ze:medium">
As usual, fix anything we might have missed directly = in the e-mail and reply. We will approve and adopt the minutes at the next = call.

Thomas

---


Min= utes Webex 6 September 2013, 6TiSCH group

Note: t= imestamps in PDT.

Taking notes=A0(using Etherpad)

  1. Xavi Vilajo= sana
  2. Dominique Ba= rthel
  3. Th= omas Watteyne

Present=A0(alphabetically)

  1. Cedric Adjh
    2. =
  2. Diego Dujovne
  3. Dominique Barthel
  4. Geraldine Texier
  5. Maria Rita Palattella
  6. Pascal Thubert
  7. Patrick Wetterwald
  8. Pouria Zand
  9. Qin Wang
  10. Raghuram Sudhaakar
  11. Thomas Watteyne
  12. Tom Phinney
  13. Xavi Vilajosana

Recording

Slides

Action items

  • Pasc= al=A0to add description of flows to architecture draft.
  • Raghuram=A0and=A0Xavi=A0to prepare overview slides of the C= oAP. To be presented at call in 1-2 weeks.
  • Pasc= al=A0to add Track and Cells to the list of items for a node to rep= ort to the PCE using report flow, on the ML.
  • Pouria=A0to identify the equivalent information sent by a = WirelessHART and ISA100.11a node to the manager.
  • Thomas=A0to conta= ct IEEE802.15.4e authors about EB priority and whether the step for EB prio= rity MUST be +1 or can be something else, e.g +Step_Of_Rank from RPL.
  • All to ask a= bout RPL OF0 presentation by Pascal on ML.

Agenda

  • Approval minutes & agenda bashing=A0[= 3min]
    • charter upda= te
  • Flow identification=A0[40min]
    • 5 flows? Ide= ntify the tiers (ME in device, PCE, NME)
    • CoAP mechanisms we could reuse
    • Discussion commands and information exchanged in flows (report)
  • Using RPL= in minimal 6TiSCH case=A0[15min]
    • Rank, Join P= riority and flow label
    • RPL and OF0
    • Impact of routing loops on synchronization
  • AOB=A0[2min]

    • Minutes

    • [08.05]=A0Meeting starts

      Recording starts

    • [08.06]=A0Approval minutes & agenda bashing=A0[3mi= n]
      • approval min= utes last minutes

        No concerns raised= . Minutes approved.

      • approval agenda

        No concerns raised= . Agenda approved.

      • charter update
        • Submitted to= IESG Thursday on 9/5/13
        • Talk by Thomas about 6TiSCH activity at senZations'13<= /li>
    • [08.10]=A0Flow identification=A0[40min]
      • 5 flows? Identify the tiers (ME in device, PCE, NME)
        • Request Flow: Internet to PCE or Mesh to PCE
        • Action Flow: PCE --> Mesh
        • Report Flow: Mesh--> PCE
        • Event Flow: Node notifies to the P= CE
        • Query Flow: = PCE asks a node
        • Acknowledgements of flows:
        • Leave the ACKs to the transport mechanism. For example, CoAP provides the o= ptional mechanism of confirmable messages.
        • [Qin]=A0ACK from transp= ort layer is part of the confirmation. Not all of the confirmation. We use = ACK from transport layer if it can be used. If we need additional confirmat= ion, this can be added from the applications layer.
        • [Tho= mas]=A02 aspects:
            ACK is to confi= rm that the message has been received.
          • Application-= level response us used to provide a response payload, e.g track confirmatio= n, etc.
        • ACKs are optional on the transport layer.
        • Next steps: add to architecture draft?
        • High level overview of the flows go to the architecture.
        • [Maria Rita]=A0Full details about the bits-and-bytes should go to the flows descript= ion draft.
        • [Qin= ]=A0Question about the picture: it is more focused to the centrali= zed case. In a distributed case the flows do not work.
        • [Pascal]=A0The current charter does not address 6top to 6t= op.
        • [Xavi]=A0We can map decentralized flows to centralized in very= brief discussion on the ML to see if there is some immediate mapping.
      • Vo= lunteer to add description of flows to architecture draft?

        Action item: Pasca= l to add description of flows to architecture draft.

        • <= /ul>
      • CoA= P mechanisms we could reuse
        • CoAP provide= s mechanisms we could take advantage of.
          • R= esources
          • methods (GET= /PUT/PUSH)
          • confirmable messages
        • Volunteers to prepare an overview of the CoAP in 1-2 weeks?
          Action item: Raghu= ram and Xavi to prepare overview slides of the CoAP. To be presented at cal= l in 1-2 weeks.

      • Discussion commands and information exchanged in flows (report)
        • Sent by the node to the PCE.
        • Gives information about how the node is doing.
        • Go through the proposed fields on th= e ML after some discussion:
            For each neighbor: ID, RSSI, LQI, Counters, Bundle information, statistics = about the link.
          • Queue information
          • Time source parents.
          • Not clear yet as to how to get at all these metrics.
          =
        • How the= PCE can configure the mote to relay only some of this information, what th= e PCE wants to know and when. Ongoing discussion on the ML.
        • [Pas= cal]=A0Bundle allocation is not redundant as when we use RPL-based= allocation the bundle is built dynamically.
        • [Pascal]=A0Tracks and cell information. Ask for devices to= report about a particular track.
        • [Pascal]=A0Monitor cells that ar= e not being used to know if they are good.

          Action item: Pasca= l to add Track and Cells to the list of items for a node to report to the P= CE using report flow, on the ML.

        • [Diego]=A0It would be interesting to get the average RSSI/= LQI per channel instead of the average amongst all. Requires node to keep p= er-channel measurements of RSSI/LQI.
        • [Thomas]=A0Important to think about the mechanism to allow= a subset of this information to be configured.
        • Volunteers to identify the equivale= nt information sent by a WirelessHART and ISA100.11a node to the manager?

          Action item: Pouri= a to identify the equivalent information sent by a WirelessHART and ISA100.= 11a node to the manager.

        • "Timeslot Management Methods and Formats" draft: Let's wait 1= -2 weeks before starting a skeleton.
    • [08.51]=A0Using R= PL in minimal 6TiSCH case [15min]
      • Rank, Join P= riority and flow label
        • Network bootstrap a= nd synchronization.
        • A joining no= de listens for EBs. Keeps listening until it hears multiple. Based on EBs, = picks best temporary parent neighbor.
        • Keeps synchronized to this temporary parent until it gets RPL DIOs. Once it= acquires a RPL rank, starts sending EBs. RPL rank used as EB join priority= .
        • The no= de keeps silent until it has a rank and selected preferrred parent.
        • [Qin= ]=A0RPL rank as join priority, is a field of 15.4e, every 15.4e im= plementation will implement that part, 6top will override this field. Break= s 15.4e?

          Action item: Thoma= s to contact IEEE802.15.4e authors about EB priority and whether the step f= or EB priority MUST be +1 or can be something else, e.g +Step_Of_Rank from = RPL. Note: by lack of time, we will skip last slides.

      • RPL and OF0=A0[Pascal]
        • Zero OF, uses basic information from RPL
        • Increments the rank at each hop independen= tly of a very detailed metric.
        • Linear categories of rank between 1 or 9.
        • How do we compute the step if we are usin= g ETX. --> use a linear approach.

          Action item: All t= o ask about RPL OF0 presentation by Pascal on ML.

      • [09.11]=A0AOB

        No other business raised.

      • [09.12]=A0Meeting ends
--047d7b2e4ca42d30cf04e5ba0ae2-- From twatteyne@gmail.com Fri Sep 6 10:09:14 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7C8F721E80FF for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 10:09:14 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.89 X-Spam-Level: X-Spam-Status: No, score=-1.89 tagged_above=-999 required=5 tests=[AWL=0.087, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id tCF4wqAI-VzD for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 10:09:12 -0700 (PDT) Received: from mail-pb0-x22e.google.com (mail-pb0-x22e.google.com [IPv6:2607:f8b0:400e:c01::22e]) by ietfa.amsl.com (Postfix) with ESMTP id 1167B21E80FA for <6tsch@ietf.org>; Fri, 6 Sep 2013 10:09:11 -0700 (PDT) Received: by mail-pb0-f46.google.com with SMTP id rq2so3465327pbb.19 for <6tsch@ietf.org>; Fri, 06 Sep 2013 10:09:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=KZMkkbjL4OcEc3rp+98y/xebH9sOrlExVwAs7oBZCoc=; b=gIcbpIdQwrAfbqrKcMzCgITl0q2Wim/949m4axmeCU59kurdoZhv1dHLBs/kPPMYzN wEVTADzQFD0/wv2nNSkH4C1/+gx83jqS1A3ZlZmUMkj54hoz+9vT7DQel0kqdXFH+C9W 6Ik2rPQ3LLxhfn7A0zsgqiL250dg9JoE50iC6IHKM53hSU/DeKqSXjCa3Q3nwwtruEcY aqr70BjaDecX6VqtxCq7WykhOBlWGwVN07mW/pW8DjBs7TC31o36Ij8u9CcAhzEBU0SH 8jEQxKV6E8XYYzCd8dZobcaqPvmBEpMDT5Ho7+fQJUryRJQQA42uoLy19pePplv8lBlF mpoA== X-Received: by 10.66.121.201 with SMTP id lm9mr5170011pab.80.1378487351772; Fri, 06 Sep 2013 10:09:11 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Fri, 6 Sep 2013 10:08:51 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Fri, 6 Sep 2013 10:08:51 -0700 X-Google-Sender-Auth: H1ej6oq0tHAvp26TJY7BWmFXq8M Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b2e4ca4ee0ed204e5ba1824 Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2013 17:09:14 -0000 --047d7b2e4ca4ee0ed204e5ba1824 Content-Type: text/plain; charset=ISO-8859-1 Xavi, Maybe if could be interesting to keep those idea in a temporary "scratchpad". I was thinking a page on the https://bitbucket.org/6tsch/meetings/wiki/Home wiki. Thomas On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) < pthubert@cisco.com> wrote: > Hello Xavi:**** > > ** ** > > At the call I mentioned we could use info on tracks and cells as well, > probably on demand from the PCE.**** > > For instance, the PCE could observe energy levels over some cells for a > while to make sure they are clean.**** > > ** ** > > What do you think?**** > > Pascal**** > > ** ** > > *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On Behalf > Of *Xavier Vilajosana Guillen > *Sent:* vendredi 6 septembre 2013 01:17 > *To:* Thomas Watteyne > *Cc:* 6tsch@ietf.org > *Subject:* Re: [6tsch] report flow contents**** > > ** ** > > agreed!**** > > So the fields become:**** > > ** ** > > ** ** > > For each known neighbor:**** > > -ID**** > > -AVG RSSI in a running window**** > > -Latest RSSI**** > > -AVG LQI in a running window [optional]**** > > -Latest LQI [optional]**** > > -Num TX packets (option in case there is communication with that neighbor) > **** > > -Num ACK packets (option in case there is communication with that > neighbor)**** > > -Num RX packets (option in case there is communication with that neighbor) > **** > > -Last ASN when it heart about that neighbor **** > > -Bundle: Num links in the Schedule to that neighbor**** > > -PDR per link [Optional -- or maybe best and worst PDR only]**** > > **** > > -Option Flag (weather there are optional TLV fields on that category)**** > > +(TLV objects)* **** > > ** ** > > -For each Queue:**** > > - Avg Queue length in a running window**** > > - Max Queue length in a running window (peak)**** > > - Current Queue length (?)**** > > - ASN of the oldest packet in the QUEUE?**** > > -Option Flag (weather there are optional TLV fields on that category)* > *** > > +(TLV objects)* **** > > ** ** > > -Time source parent**** > > -ID**** > > -Avg clock drift (correction done) in a running window**** > > -Latest clock correction**** > > -Parent changes (counter of how many times I changed my time source > parent)**** > > -Option Flag (weather there are optional TLV fields on that category)* > *** > > +(TLV objects)* **** > > ** ** > > -Option Flag (weather there are optional TLV fields in other categories)** > ** > > +(TLV objects)* **** > > ** ** > > as regards to this:**** > > ** ** > > "Finally, do you envision a generic mechanism whereby the PCE can turn > fields on/off, or triggered independently?"**** > > ** ** > > I see it as CoAP Options, where a set of bytes can be used as "clever > bitmap" to tell what options are there, the parsing will decode option by > option and will read the fields. In that way any combination of fields is > supported.**** > > ** ** > > would that work?**** > > X**** > > ** ** > > On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > Xavi,**** > > ** ** > > Fantastic!**** > > ** ** > > I believe PDR for each link might be too long to fit in a packet. While > the mote will most likely keep that information, we could move that to the > query flow, i.e. it is available to the PCE on-demand.**** > > ** ** > > Would you agree that the number of links in a bundle belongs to the > neighbor? Of maybe we want a "bundle" category?**** > > ** ** > > In queuing, it might be interesting to see the age of the different > packets, to be able to monitor latency.**** > > ** ** > > About LQI, there is no general consensus among vendors on what the > definition is, or how exactly it is calculated. I would make it optional.* > *** > > ** ** > > Also, it might be good to be able to add arbitrary fields to each > category: neighbor, queue, time source neighbor.**** > > ** ** > > Finally, do you envision a generic mechanism whereby the PCE can turn > fields on/off, or triggered independently?**** > > ** ** > > Thomas**** > > ** ** > > On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote:**** > > Hi Thomas, Diego,**** > > ** ** > > I agree that LQI should be there as well. I update here the list with > Thomas suggestions. **** > > ** ** > > For each known neighbor:**** > > -ID**** > > -AVG RSSI in a running window**** > > -Latest RSSI**** > > -AVG LQI in a running window**** > > -Latest LQI**** > > -Num TX packets (option in case there is communication with that neighbor) > **** > > -Num ACK packets (option in case there is communication with that > neighbor)**** > > -Num RX packets (option in case there is communication with that neighbor) > **** > > -Last ASN when it heart about that neighbor **** > > ** ** > > Other fields**** > > -Num links in the Schedule to that neighbor**** > > -For each link PDR**** > > -For each Queue:**** > > - Avg Queue length in a running window**** > > - Max Queue length in a running window (peak)**** > > - Current Queue length (?)**** > > -Time source parent**** > > -ID**** > > -Avg clock drift (correction done) in a running window**** > > -Latest clock correction**** > > -Parent changes (counter of how many times I changed my time source > parent)**** > > ** ** > > -Option Flag (weather there are optional TLV fields)**** > > +(TLV objects)* **** > > ** ** > > ** ** > > Hope this makes sense.**** > > cheers! > Xavi**** > > ** ** > > On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > *[renamed thread]***** > > ** ** > > Xavi,**** > > ** ** > > A few thoughts:**** > > - the counters (numTx, etc) will only be present for neighbors the node > has communicate with, so they should be optional in the packet.**** > > - you have focused on the topological information (which I think is the > right one). It might be useful to gather other data related to > synchronization or queuing.**** > > - I couldn't agree more with your suggestion to make it extensible. This > does mean that we will need to state somewhere that a device need to ignore > silently fields it does not understand.**** > > ** ** > > Thomas**** > > ** ** > > On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote:**** > > Hello, I guess that flows are getting defined and I started to think on > the contents of the messages on that flows. Not sure if this is the right > time or I am going way far..**** > > ** ** > > According to the previous discussion I assume that the five flows are:**** > > ** ** > > ME-6TOP - Query Flow**** > > ME-6TOP - Action Flow**** > > ** ** > > 6TOP - ME - Report Flow**** > > 6TOP - ME - Event Flow**** > > 6TOP - ME - Request BW Flow**** > > ** ** > > I'd like to start defining the content of the messages in the Report Flow: > **** > > ** ** > > The Report Flow: has to deal with the information that a node knows and > has to be sent to the ME so the ME can compute the schedule among others. > Here I list the information that we can know in a mote and can be used at > the ME to compute the schedule (complete please if I miss something)**** > > ** ** > > For each known neighbor:**** > > -ID**** > > -AVG RSSI in a running window**** > > -Latest RSSI**** > > -Num TX packets**** > > -Num ACK packets**** > > -Num RX packets**** > > -Last ASN when it heart about that neighbor **** > > ** ** > > Other fields**** > > -Num links in the Schedule to that neighbor**** > > -For each link PDR**** > > **** > > **** > > Then we need to have some TLV like objects that can be used for > ad-hoc/naive/other extensions of the reporting process. In that way we > don't constraint the implementation of the scheduling alg. to that > information.**** > > ** ** > > what do you think?**** > > X**** > > ** ** > > On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote:** > ** > > Hi all,**** > > ** ** > > In this thread, we will continue the discussion about Confirmation > message. Here is some background information.**** > > ** ** > > Context: e.g.**** > > - node sends a report and want to know if the report is accepted., *** > * > > - ME sends a action request and want to know if/when the action taken. > **** > > Options:**** > > (1) Nothing**** > > (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** > > (3) App-level ACK type**** > > (4) Use different flow (i.e. action flow)**** > > ** ** > > IMHO, different control flow may have different requirement for > confirmation message.**** > > (1) Action Flow, needs a App-level confirmation, like Succ/Fail**** > > (2) Query Flow, automatically has the confirmation, i.e. the message > packet corresponding to a specific query.**** > > (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer > option (1) and (3), i.e. the confirmation message is an option, but if a > confirmation message is needed, it should be App-level Ack, instead of > transport layer confirmation, which will give 6top more flexibility.**** > > ** ** > > What do you think?**** > > ** ** > > Thanks**** > > Qin**** > > **** > > ** ** > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > > ** ** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > --047d7b2e4ca4ee0ed204e5ba1824 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Xavi,

Maybe if could be interesting to = keep those idea in a temporary "scratchpad". I was thinking a pag= e on the=A0https= ://bitbucket.org/6tsch/meetings/wiki/Home=A0wiki.

Thomas


On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pt= hubert) <pthubert@cisco.com> wrote:

Hello Xavi:

=A0<= /p>

At the call I mentioned w= e could use info on tracks and cells as well, probably on demand from the P= CE.

For instance, the PCE cou= ld observe energy levels over some cells for=A0 a while to make sure they a= re clean.

=A0<= /p>

What do you think?=

Pascal=

=A0<= /p>

From: 6tsch-bounces@ietf.org= [mailto:6t= sch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
Sent: vendredi 6 septembre 2013 01:17
To: Thomas Watteyne
Cc: 6tsch@ietf.o= rg
Subject: Re: [6tsch] report flow contents

=A0

agreed!

So the fields become:

=A0

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window=

=A0-Latest RSSI

=A0-AVG LQI in a running window [optional]=

=A0-Latest LQI [optional]

=A0-Num TX packets (option in case there i= s communication with that neighbor)

=A0-Num ACK packets (option in case there = is communication with that neighbor)

=A0-Num RX packets (option in case there i= s communication with that neighbor)

=A0-Last ASN when it heart about that neig= hbor=A0

=A0-Bundle: Num links in the Schedule to t= hat neighbor

=A0 =A0 =A0 -PDR per link [Optional -- or = maybe best and worst PDR only]

=A0

=A0-Option Flag (weather the= re are optional TLV fields on that category)

=A0 =A0+(TLV objects)*=A0=

=A0

=A0-For each Queue:

=A0 =A0 - Avg Queue length in a running wi= ndow

=A0 =A0 - Max Queue length in a running wi= ndow (peak)

=A0 =A0 - Current Queue length (?)<= u>

=A0 =A0 - ASN of the oldest packet in the = QUEUE?

=A0 =A0 -Option Flag (weather there are op= tional TLV fields on that category)

=A0 =A0 =A0 =A0 +(TLV objects)*=A0<= u>

=A0

-Time source parent

=A0 =A0 -ID

=A0 =A0 -Avg clock drift (correction done)= in a running window

=A0 =A0 -Latest clock correction=

=A0 =A0 -Parent changes (counter of how ma= ny times I changed my time source parent)

=A0 =A0 -Option Flag (weather there are op= tional TLV fields on that category)

=A0 =A0 +(TLV objects)*=A0

=A0

-Option Flag (weather there are optional T= LV fields in other categories)

=A0 =A0+(TLV objects)*=A0

=A0

as regards to this:

=A0

"Finally, do you envision a generic m= echanism whereby the PCE can turn fields on/off, or triggered independently= ?"

=A0

I see it as CoAP Options, where a set of bytes can be used= as "clever bitmap" to tell what options are there, the parsing w= ill decode option by option and will read the fields. In that way any combination of fields is supported.

=A0

would that work?

X

=A0

On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

Xavi,

=A0

Fantastic!

=A0

I believe PDR for each link might be too long to fit= in a packet. While the mote will most likely keep that information, we cou= ld move that to the query flow, i.e. it is available to the PCE on-demand.<= u>

=A0

Would you agree that the number of links in a bundle= belongs to the neighbor? Of maybe we want a "bundle" category?

=A0

In queuing, it might be interesting to see the age o= f the different packets, to be able to monitor latency.

=A0

About LQI, there is no general consensus among vendo= rs on what the definition is, or how exactly it is calculated. I would make= it optional.

=A0

Also, it might be good to be able to add arbitrary f= ields to each category: neighbor, queue, time source neighbor.

=A0

Finally, do you envision a generic mechanism whereby= the PCE can turn fields on/off, or triggered independently?<= /p>

=A0

Thomas

=A0

On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:

Hi Thomas, Diego,

=A0

I agree that LQI should be there as well. I update h= ere the list with Thomas suggestions.=A0

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window=

=A0-Latest RSSI

=A0-AVG LQI in a running window<= /u>

=A0-Latest LQI

=A0-Num TX packets (option in case there i= s communication with that neighbor)

=A0-Num ACK packets (option in case there = is communication with that neighbor)

=A0-Num RX packets (option in case there i= s communication with that neighbor)

=A0-Last ASN when it heart about that neig= hbor=A0

=A0

Other fields

=A0-Num links in the Schedule to that neig= hbor

=A0 =A0 -For each link PDR

=A0-For each Queue:

=A0 =A0 - Avg Queue length in a running window

=A0 =A0 - Max Queue length in a running window (peak= )

=A0 =A0 - Current Queue length (?)

-Time source parent

=A0 =A0 -ID

=A0 =A0 -Avg clock drift (correction done) in a runn= ing window

=A0 =A0 -Latest clock correction

=A0 =A0 -Parent changes (counter of how many times I= changed my time source parent)

=A0

-Option Flag (weather there are optional TLV fields)=

=A0 =A0+(TLV objects)*=A0

=A0

=A0

Hope this makes sense.

cheers!
Xavi

=A0

On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

[renamed thread]=

=A0

Xavi,

=A0

A few thoughts:

- the counters (numTx, etc) will only be = present for neighbors the node has communicate with, so they should be opti= onal in the packet.

- you have focused on the topological inf= ormation (which I think is the right one). It might be useful to gather oth= er data related to synchronization or queuing.

- I couldn't agree more with your sug= gestion to make it extensible. This does mean that we will need to state so= mewhere that a device need to ignore silently fields it does not understand.

=A0

Thomas

=A0

On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:

Hello, I guess that flows are getting defined and I = started to think on the contents of the messages on that flows. Not sure if= this is the right time or I am going way far..

=A0

According to the previous discussion I assume that t= he five flows are:

=A0

ME-6TOP - Query Flow

ME-6TOP - Action Flow

=A0

6TOP - ME - Report Flow

6TOP - ME - Event Flow

6TOP - ME - Request BW Flow

=A0

I'd like to start defining the content of the me= ssages in the Report Flow:

=A0

The Report Flow: has to deal with the information th= at a node knows and has to be sent to the ME so the ME can compute the sche= dule among others. Here I list =A0the information that we can know in a mot= e and can be used at the ME to compute the schedule (complete please if I miss something)

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window

=A0-Latest RSSI

=A0-Num TX packets

=A0-Num ACK packets

=A0-Num RX packets

=A0-Last ASN when it heart about that neighbor=A0=

=A0

Other fields

=A0-Num links in the Schedule to that neighbor

=A0 =A0 -For each link PDR

=A0

=A0

Then we need to have some TLV like objects that can = be used for ad-hoc/naive/other extensions of the reporting process. In that= way we don't constraint the implementation of the scheduling alg. to t= hat information.

=A0

what do you think?

X

=A0

On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi all,

=A0

In this thread, we = will continue the discussion about Confirmation message. Here is some backg= round information.

=A0

Context: e.g.

=A0 =A0 - node send= s a report and want to know if the report is accepted.,=A0=

=A0 =A0 - ME sends = a action request and want to know if/when the action taken.

Options:<= /u>

=A0 =A0(1) Nothing<= /span>

=A0 =A0(2) Rely on = transport mechanism (e.g. confirmable CoAP message)

=A0 =A0(3) App-leve= l ACK type

=A0 =A0(4) Use diff= erent flow (i.e. action flow)

=A0

IMHO, different con= trol flow may have different requirement for confirmation message.

=A0 =A0 (1) Action = Flow, needs a App-level confirmation, like Succ/Fail

=A0 =A0 (2) Query F= low, automatically has the confirmation, i.e. the message packet correspond= ing to a specific query.

=A0 =A0 (3) Report = Flow and Event Flow, option (1)-(3) are OK, but I prefer option (1) and (3)= , i.e. the confirmation message is an option, but if a confirmation message= is needed, it should be App-level Ack, instead of transport layer confirmation, which will give 6top more flexibi= lity.

=A0

What do you think?<= /span>

=A0

Thanks

Qin

=A0 = =A0=A0

=A0

_____________________= __________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


--047d7b2e4ca4ee0ed204e5ba1824-- From pthubert@cisco.com Fri Sep 6 10:14:31 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9AB6611E82B1 for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 10:14:31 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -9.906 X-Spam-Level: X-Spam-Status: No, score=-9.906 tagged_above=-999 required=5 tests=[AWL=-0.508, BAYES_00=-2.599, HTML_MESSAGE=0.001, J_CHICKENPOX_13=0.6, J_CHICKENPOX_24=0.6, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id cV688JsXy+K8 for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 10:14:26 -0700 (PDT) Received: from rcdn-iport-3.cisco.com (rcdn-iport-3.cisco.com [173.37.86.74]) by ietfa.amsl.com (Postfix) with ESMTP id D89FA11E81BE for <6tsch@ietf.org>; Fri, 6 Sep 2013 10:14:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=10377; q=dns/txt; s=iport; t=1378487666; x=1379697266; h=from:to:subject:date:message-id:references:in-reply-to: mime-version; bh=9XW6kcmQ6xSaVbg3SUvjCdUkaiM/gGos1JGLWtrN+rQ=; b=Krd6mi1B130U+mQPvE8oR5vHPBx3kvjiZL5xf3KpTf5gmJkOLGARoMY3 WIPEBJmOjpX191SNwyrSTyXUfE4yjofCn3AvFx5iU4/q0i9EyJ++np+CE 4gi4MGJQqJNDlcfox2UoQcBOFSLCVYgNZHwRXR7jOhdnLWJmM4FyPNkLO E=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AicFALcMKlKtJV2b/2dsb2JhbABbDoI1RDVRwVWBJhZ0giQBAQEELVwCAQgRBAEBCx0HMhQJCAIEARIIEYdpvhGPSzcBgx2BAAOFS6QQgmE/gio X-IronPort-AV: E=Sophos;i="4.90,855,1371081600"; d="scan'208,217";a="256580631" Received: from rcdn-core-4.cisco.com ([173.37.93.155]) by rcdn-iport-3.cisco.com with ESMTP; 06 Sep 2013 17:14:25 +0000 Received: from xhc-rcd-x14.cisco.com (xhc-rcd-x14.cisco.com [173.37.183.88]) by rcdn-core-4.cisco.com (8.14.5/8.14.5) with ESMTP id r86HEPMV022932 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 6 Sep 2013 17:14:25 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-rcd-x14.cisco.com ([173.37.183.88]) with mapi id 14.02.0318.004; Fri, 6 Sep 2013 12:14:24 -0500 From: "Pascal Thubert (pthubert)" To: Thomas Watteyne , 6TSCH <6tsch@ietf.org> Thread-Topic: [6tsch] Zero Objective Function discussion Thread-Index: AQHOqxyrmdzGpsuAKEqe7jTsIgMIRJm47Ugg Date: Fri, 6 Sep 2013 17:14:23 +0000 Deferred-Delivery: Fri, 6 Sep 2013 17:14:00 +0000 Message-ID: References: In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.61.64.110] Content-Type: multipart/alternative; boundary="_000_E045AECD98228444A58C61C200AE1BD84145CF1Exmbrcdx01ciscoc_" MIME-Version: 1.0 Subject: Re: [6tsch] Zero Objective Function discussion X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2013 17:14:31 -0000 --_000_E045AECD98228444A58C61C200AE1BD84145CF1Exmbrcdx01ciscoc_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hello Thomas: The idea behind RFC 6552 is that we can say nothing if we do not want to sp= ecify anything. Node will interoperate and a rather correct network will fo= rm as long as devices use a normalized value for Sp(best =3D 1, good =3D 3,= worst =3D 9) We can make the life simpler for implementers by defining that we use ETX a= nd that the normalization process is, say, 2*ETX as in my example; by RFC 6= 552 standards would mean that good link is ETX =3D 1.5 and ETX is acceptabl= e up to 4.5 RFC 6719 provides another OF that can be used without a metric container, s= ee section 3.5. In that case, ETX /2 is used. This gives a larger span to t= he network but means trouble to map in a join priority or a flow label. I proposed a general formula Sp =3D a*ETX + b where a is between 1 and 3 an= d b is between 0 and 2 or 3. If b is not null, the Rank grows faster with t= he number of hops so deeper networks are not favored. To be honest I'm not = convinced that it is a great idea for data instances or to encourage duocas= t it could be good. An example of that would be a=3D1, b=3D2, which means that each hop incurs = an additional penalty equivalent to an ETX of 2. This would mean that ETX i= s acceptable up to 7. Probably specififying that we use OF0 with Rf =3D 1 Sp =3D 2* ETX Sr =3D 0 Is not a lot of work is it? Pascal From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of T= homas Watteyne Sent: vendredi 6 septembre 2013 18:18 To: 6TSCH Subject: [6tsch] Zero Objective Function discussion Pascal, Thank you for presenting the OF0 discussion on the call today. I have a qui= ck question about the depth penalty. In your example on the call, you used = b=3D0. Could you detail a case where using a value of b different than 0 is= applicable? Also, do you think there is an alternative to defining our own computation = of Sp? Certainly in the minimal draft, it would be good if we could use a O= F as-is, without introducing anything new. Thomas --_000_E045AECD98228444A58C61C200AE1BD84145CF1Exmbrcdx01ciscoc_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hello Thomas:

 <= /p>

The idea behind RFC 6552 = is that we can say nothing if we do not want to specify anything. Node will= interoperate and a rather correct network will form as long as devices use a normalized value for Sp(best =3D 1, good =3D 3, wors= t =3D 9)

 <= /p>

We can make the life simp= ler for implementers by defining that we use ETX and that the normalization= process is, say, 2*ETX as in my example; by RFC 6552 standards would mean that good link is ETX =3D 1.5 and ETX is = acceptable up to 4.5

 <= /p>

RFC 6719 provides another= OF that can be used without a metric container, see section 3.5. In that c= ase, ETX /2 is used. This gives a larger span to the network but means trouble to map in a join priority or a flow label.

 <= /p>

I proposed a general form= ula Sp =3D a*ETX + b where a is between 1 and 3 and b is between 0 and = 2 or 3. If b is not null, the Rank grows faster with the number of hops so deeper networks are not favored. To be honest I’m not con= vinced that it is a great idea for data instances or to encourage duocast i= t could be good.

 <= /p>

An example of that would = be a=3D1, b=3D2, which means that each hop incurs an additional penalty equ= ivalent to an ETX of 2. This would mean that ETX is acceptable up to 7.

 <= /p>

Probably specififying tha= t we use OF0 with

Rf =3D 1

Sp =3D 2* ETX<= /span>

Sr =3D 0

 <= /p>

Is not a lot of work is i= t?

 <= /p>

Pascal<= /p>

 <= /p>

From: 6tsch-bo= unces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Thomas Watteyne
Sent: vendredi 6 septembre 2013 18:18
To: 6TSCH
Subject: [6tsch] Zero Objective Function discussion

 

Pascal,

 

Thank you for presenting the OF0 discussion on the c= all today. I have a quick question about the depth penalty. In your example= on the call, you used b=3D0. Could you detail a case where using a value o= f b different than 0 is applicable?

 

Also, do you think there is an alternative to defini= ng our own computation of Sp? Certainly in the minimal draft, it would be g= ood if we could use a OF as-is, without introducing anything new.

 

Thomas

--_000_E045AECD98228444A58C61C200AE1BD84145CF1Exmbrcdx01ciscoc_-- From xvilajosana@berkeley.edu Fri Sep 6 10:43:27 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ED89F21F9B60 for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 10:43:27 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.75 X-Spam-Level: X-Spam-Status: No, score=-2.75 tagged_above=-999 required=5 tests=[AWL=0.226, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fg1TgWdju+7y for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 10:43:23 -0700 (PDT) Received: from mail-pa0-f52.google.com (mail-pa0-f52.google.com [209.85.220.52]) by ietfa.amsl.com (Postfix) with ESMTP id 97E8811E80F4 for <6tsch@ietf.org>; Fri, 6 Sep 2013 10:43:23 -0700 (PDT) Received: by mail-pa0-f52.google.com with SMTP id kq13so3619902pab.11 for <6tsch@ietf.org>; Fri, 06 Sep 2013 10:43:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=DXwYRki9fWN6Br5H4XYpTFAB6vdNmKo+OQpmXVbQn54=; b=GwY8xEyLRQrYcsFtn3Y35oU9Kz3iYooGMRv5rQBO4fk5pPkkIcfDRe1IV9vEst76rV 0ZySvVZ+7hOMEijIyqydmzEv7BxKAqQ/hAKqzW5zvjQoUS1lv1aSmyNe4JO8Y6/43NSn FHU0egJ6W72MPkkicmamcw8RDC2bEIIQ5Ox0Z+ic670XInkH25RVbfMAEeYfpV+gxNdG IoJ2ij81TCPidfSWlMhAXxB3Rk7SKELM1YcmYc9aS+CphBeLL8GfX0r7wbigkhirqnQb s//4krQEs9PDPsnos1PFOkJYqzuDpk5vWIZgquNVlqXmiL2T0spUzqaqSSfhF3uGyAPx U0Vw== X-Gm-Message-State: ALoCoQmxZLYOD3WhxzIukmecIoEbXAPbXgtICT21PRwXVGTXDwpQwBZKtiAfM2wttBobHMlofk3L MIME-Version: 1.0 X-Received: by 10.66.240.67 with SMTP id vy3mr5174752pac.141.1378489403074; Fri, 06 Sep 2013 10:43:23 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Fri, 6 Sep 2013 10:43:22 -0700 (PDT) In-Reply-To: References: Date: Fri, 6 Sep 2013 10:43:22 -0700 Message-ID: From: Xavier Vilajosana Guillen To: "Pascal Thubert (pthubert)" Content-Type: multipart/alternative; boundary=047d7b15ab7f3276d304e5ba93dd Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2013 17:43:28 -0000 --047d7b15ab7f3276d304e5ba93dd Content-Type: text/plain; charset=ISO-8859-1 Hi Pascal, it is a good idea! I will collect that information and as Thomas put it at the wiki so we do not lose it. :-) X On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) < pthubert@cisco.com> wrote: > Hello Xavi:**** > > ** ** > > At the call I mentioned we could use info on tracks and cells as well, > probably on demand from the PCE.**** > > For instance, the PCE could observe energy levels over some cells for a > while to make sure they are clean.**** > > ** ** > > What do you think?**** > > Pascal**** > > ** ** > > *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On Behalf > Of *Xavier Vilajosana Guillen > *Sent:* vendredi 6 septembre 2013 01:17 > *To:* Thomas Watteyne > *Cc:* 6tsch@ietf.org > *Subject:* Re: [6tsch] report flow contents**** > > ** ** > > agreed!**** > > So the fields become:**** > > ** ** > > ** ** > > For each known neighbor:**** > > -ID**** > > -AVG RSSI in a running window**** > > -Latest RSSI**** > > -AVG LQI in a running window [optional]**** > > -Latest LQI [optional]**** > > -Num TX packets (option in case there is communication with that neighbor) > **** > > -Num ACK packets (option in case there is communication with that > neighbor)**** > > -Num RX packets (option in case there is communication with that neighbor) > **** > > -Last ASN when it heart about that neighbor **** > > -Bundle: Num links in the Schedule to that neighbor**** > > -PDR per link [Optional -- or maybe best and worst PDR only]**** > > **** > > -Option Flag (weather there are optional TLV fields on that category)**** > > +(TLV objects)* **** > > ** ** > > -For each Queue:**** > > - Avg Queue length in a running window**** > > - Max Queue length in a running window (peak)**** > > - Current Queue length (?)**** > > - ASN of the oldest packet in the QUEUE?**** > > -Option Flag (weather there are optional TLV fields on that category)* > *** > > +(TLV objects)* **** > > ** ** > > -Time source parent**** > > -ID**** > > -Avg clock drift (correction done) in a running window**** > > -Latest clock correction**** > > -Parent changes (counter of how many times I changed my time source > parent)**** > > -Option Flag (weather there are optional TLV fields on that category)* > *** > > +(TLV objects)* **** > > ** ** > > -Option Flag (weather there are optional TLV fields in other categories)** > ** > > +(TLV objects)* **** > > ** ** > > as regards to this:**** > > ** ** > > "Finally, do you envision a generic mechanism whereby the PCE can turn > fields on/off, or triggered independently?"**** > > ** ** > > I see it as CoAP Options, where a set of bytes can be used as "clever > bitmap" to tell what options are there, the parsing will decode option by > option and will read the fields. In that way any combination of fields is > supported.**** > > ** ** > > would that work?**** > > X**** > > ** ** > > On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > Xavi,**** > > ** ** > > Fantastic!**** > > ** ** > > I believe PDR for each link might be too long to fit in a packet. While > the mote will most likely keep that information, we could move that to the > query flow, i.e. it is available to the PCE on-demand.**** > > ** ** > > Would you agree that the number of links in a bundle belongs to the > neighbor? Of maybe we want a "bundle" category?**** > > ** ** > > In queuing, it might be interesting to see the age of the different > packets, to be able to monitor latency.**** > > ** ** > > About LQI, there is no general consensus among vendors on what the > definition is, or how exactly it is calculated. I would make it optional.* > *** > > ** ** > > Also, it might be good to be able to add arbitrary fields to each > category: neighbor, queue, time source neighbor.**** > > ** ** > > Finally, do you envision a generic mechanism whereby the PCE can turn > fields on/off, or triggered independently?**** > > ** ** > > Thomas**** > > ** ** > > On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote:**** > > Hi Thomas, Diego,**** > > ** ** > > I agree that LQI should be there as well. I update here the list with > Thomas suggestions. **** > > ** ** > > For each known neighbor:**** > > -ID**** > > -AVG RSSI in a running window**** > > -Latest RSSI**** > > -AVG LQI in a running window**** > > -Latest LQI**** > > -Num TX packets (option in case there is communication with that neighbor) > **** > > -Num ACK packets (option in case there is communication with that > neighbor)**** > > -Num RX packets (option in case there is communication with that neighbor) > **** > > -Last ASN when it heart about that neighbor **** > > ** ** > > Other fields**** > > -Num links in the Schedule to that neighbor**** > > -For each link PDR**** > > -For each Queue:**** > > - Avg Queue length in a running window**** > > - Max Queue length in a running window (peak)**** > > - Current Queue length (?)**** > > -Time source parent**** > > -ID**** > > -Avg clock drift (correction done) in a running window**** > > -Latest clock correction**** > > -Parent changes (counter of how many times I changed my time source > parent)**** > > ** ** > > -Option Flag (weather there are optional TLV fields)**** > > +(TLV objects)* **** > > ** ** > > ** ** > > Hope this makes sense.**** > > cheers! > Xavi**** > > ** ** > > On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > *[renamed thread]***** > > ** ** > > Xavi,**** > > ** ** > > A few thoughts:**** > > - the counters (numTx, etc) will only be present for neighbors the node > has communicate with, so they should be optional in the packet.**** > > - you have focused on the topological information (which I think is the > right one). It might be useful to gather other data related to > synchronization or queuing.**** > > - I couldn't agree more with your suggestion to make it extensible. This > does mean that we will need to state somewhere that a device need to ignore > silently fields it does not understand.**** > > ** ** > > Thomas**** > > ** ** > > On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote:**** > > Hello, I guess that flows are getting defined and I started to think on > the contents of the messages on that flows. Not sure if this is the right > time or I am going way far..**** > > ** ** > > According to the previous discussion I assume that the five flows are:**** > > ** ** > > ME-6TOP - Query Flow**** > > ME-6TOP - Action Flow**** > > ** ** > > 6TOP - ME - Report Flow**** > > 6TOP - ME - Event Flow**** > > 6TOP - ME - Request BW Flow**** > > ** ** > > I'd like to start defining the content of the messages in the Report Flow: > **** > > ** ** > > The Report Flow: has to deal with the information that a node knows and > has to be sent to the ME so the ME can compute the schedule among others. > Here I list the information that we can know in a mote and can be used at > the ME to compute the schedule (complete please if I miss something)**** > > ** ** > > For each known neighbor:**** > > -ID**** > > -AVG RSSI in a running window**** > > -Latest RSSI**** > > -Num TX packets**** > > -Num ACK packets**** > > -Num RX packets**** > > -Last ASN when it heart about that neighbor **** > > ** ** > > Other fields**** > > -Num links in the Schedule to that neighbor**** > > -For each link PDR**** > > **** > > **** > > Then we need to have some TLV like objects that can be used for > ad-hoc/naive/other extensions of the reporting process. In that way we > don't constraint the implementation of the scheduling alg. to that > information.**** > > ** ** > > what do you think?**** > > X**** > > ** ** > > On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote:** > ** > > Hi all,**** > > ** ** > > In this thread, we will continue the discussion about Confirmation > message. Here is some background information.**** > > ** ** > > Context: e.g.**** > > - node sends a report and want to know if the report is accepted., *** > * > > - ME sends a action request and want to know if/when the action taken. > **** > > Options:**** > > (1) Nothing**** > > (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** > > (3) App-level ACK type**** > > (4) Use different flow (i.e. action flow)**** > > ** ** > > IMHO, different control flow may have different requirement for > confirmation message.**** > > (1) Action Flow, needs a App-level confirmation, like Succ/Fail**** > > (2) Query Flow, automatically has the confirmation, i.e. the message > packet corresponding to a specific query.**** > > (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer > option (1) and (3), i.e. the confirmation message is an option, but if a > confirmation message is needed, it should be App-level Ack, instead of > transport layer confirmation, which will give 6top more flexibility.**** > > ** ** > > What do you think?**** > > ** ** > > Thanks**** > > Qin**** > > **** > > ** ** > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > > ** ** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > --047d7b15ab7f3276d304e5ba93dd Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hi Pascal, it is a good idea!

I wil= l collect that information and as Thomas put it at the wiki so we do not lo= se it.

:-)
X


On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) <pthubert@cisco= .com> wrote:

Hello Xavi:

=A0<= /p>

At the call I mentioned w= e could use info on tracks and cells as well, probably on demand from the P= CE.

For instance, the PCE cou= ld observe energy levels over some cells for=A0 a while to make sure they a= re clean.

=A0<= /p>

What do you think?=

Pascal=

=A0<= /p>

From: 6tsch-bounces@ietf.org= [mailto:6t= sch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
Sent: vendredi 6 septembre 2013 01:17
To: Thomas Watteyne
Cc: 6tsch@ietf.o= rg
Subject: Re: [6tsch] report flow contents

=A0

agreed!

So the fields become:

=A0

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window=

=A0-Latest RSSI

=A0-AVG LQI in a running window [optional]=

=A0-Latest LQI [optional]

=A0-Num TX packets (option in case there i= s communication with that neighbor)

=A0-Num ACK packets (option in case there = is communication with that neighbor)

=A0-Num RX packets (option in case there i= s communication with that neighbor)

=A0-Last ASN when it heart about that neig= hbor=A0

=A0-Bundle: Num links in the Schedule to t= hat neighbor

=A0 =A0 =A0 -PDR per link [Optional -- or = maybe best and worst PDR only]

=A0

=A0-Option Flag (weather the= re are optional TLV fields on that category)

=A0 =A0+(TLV objects)*=A0=

=A0

=A0-For each Queue:

=A0 =A0 - Avg Queue length in a running wi= ndow

=A0 =A0 - Max Queue length in a running wi= ndow (peak)

=A0 =A0 - Current Queue length (?)<= u>

=A0 =A0 - ASN of the oldest packet in the = QUEUE?

=A0 =A0 -Option Flag (weather there are op= tional TLV fields on that category)

=A0 =A0 =A0 =A0 +(TLV objects)*=A0<= u>

=A0

-Time source parent

=A0 =A0 -ID

=A0 =A0 -Avg clock drift (correction done)= in a running window

=A0 =A0 -Latest clock correction=

=A0 =A0 -Parent changes (counter of how ma= ny times I changed my time source parent)

=A0 =A0 -Option Flag (weather there are op= tional TLV fields on that category)

=A0 =A0 +(TLV objects)*=A0

=A0

-Option Flag (weather there are optional T= LV fields in other categories)

=A0 =A0+(TLV objects)*=A0

=A0

as regards to this:

=A0

"Finally, do you envision a generic m= echanism whereby the PCE can turn fields on/off, or triggered independently= ?"

=A0

I see it as CoAP Options, where a set of bytes can be used= as "clever bitmap" to tell what options are there, the parsing w= ill decode option by option and will read the fields. In that way any combination of fields is supported.

=A0

would that work?

X

=A0

On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

Xavi,

=A0

Fantastic!

=A0

I believe PDR for each link might be too long to fit= in a packet. While the mote will most likely keep that information, we cou= ld move that to the query flow, i.e. it is available to the PCE on-demand.<= u>

=A0

Would you agree that the number of links in a bundle= belongs to the neighbor? Of maybe we want a "bundle" category?

=A0

In queuing, it might be interesting to see the age o= f the different packets, to be able to monitor latency.

=A0

About LQI, there is no general consensus among vendo= rs on what the definition is, or how exactly it is calculated. I would make= it optional.

=A0

Also, it might be good to be able to add arbitrary f= ields to each category: neighbor, queue, time source neighbor.

=A0

Finally, do you envision a generic mechanism whereby= the PCE can turn fields on/off, or triggered independently?<= /p>

=A0

Thomas

=A0

On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:

Hi Thomas, Diego,

=A0

I agree that LQI should be there as well. I update h= ere the list with Thomas suggestions.=A0

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window=

=A0-Latest RSSI

=A0-AVG LQI in a running window<= /u>

=A0-Latest LQI

=A0-Num TX packets (option in case there i= s communication with that neighbor)

=A0-Num ACK packets (option in case there = is communication with that neighbor)

=A0-Num RX packets (option in case there i= s communication with that neighbor)

=A0-Last ASN when it heart about that neig= hbor=A0

=A0

Other fields

=A0-Num links in the Schedule to that neig= hbor

=A0 =A0 -For each link PDR

=A0-For each Queue:

=A0 =A0 - Avg Queue length in a running window

=A0 =A0 - Max Queue length in a running window (peak= )

=A0 =A0 - Current Queue length (?)

-Time source parent

=A0 =A0 -ID

=A0 =A0 -Avg clock drift (correction done) in a runn= ing window

=A0 =A0 -Latest clock correction

=A0 =A0 -Parent changes (counter of how many times I= changed my time source parent)

=A0

-Option Flag (weather there are optional TLV fields)=

=A0 =A0+(TLV objects)*=A0

=A0

=A0

Hope this makes sense.

cheers!
Xavi

=A0

On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

[renamed thread]=

=A0

Xavi,

=A0

A few thoughts:

- the counters (numTx, etc) will only be = present for neighbors the node has communicate with, so they should be opti= onal in the packet.

- you have focused on the topological inf= ormation (which I think is the right one). It might be useful to gather oth= er data related to synchronization or queuing.

- I couldn't agree more with your sug= gestion to make it extensible. This does mean that we will need to state so= mewhere that a device need to ignore silently fields it does not understand.

=A0

Thomas

=A0

On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:

Hello, I guess that flows are getting defined and I = started to think on the contents of the messages on that flows. Not sure if= this is the right time or I am going way far..

=A0

According to the previous discussion I assume that t= he five flows are:

=A0

ME-6TOP - Query Flow

ME-6TOP - Action Flow

=A0

6TOP - ME - Report Flow

6TOP - ME - Event Flow

6TOP - ME - Request BW Flow

=A0

I'd like to start defining the content of the me= ssages in the Report Flow:

=A0

The Report Flow: has to deal with the information th= at a node knows and has to be sent to the ME so the ME can compute the sche= dule among others. Here I list =A0the information that we can know in a mot= e and can be used at the ME to compute the schedule (complete please if I miss something)

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window

=A0-Latest RSSI

=A0-Num TX packets

=A0-Num ACK packets

=A0-Num RX packets

=A0-Last ASN when it heart about that neighbor=A0=

=A0

Other fields

=A0-Num links in the Schedule to that neighbor

=A0 =A0 -For each link PDR

=A0

=A0

Then we need to have some TLV like objects that can = be used for ad-hoc/naive/other extensions of the reporting process. In that= way we don't constraint the implementation of the scheduling alg. to t= hat information.

=A0

what do you think?

X

=A0

On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi all,

=A0

In this thread, we = will continue the discussion about Confirmation message. Here is some backg= round information.

=A0

Context: e.g.

=A0 =A0 - node send= s a report and want to know if the report is accepted.,=A0=

=A0 =A0 - ME sends = a action request and want to know if/when the action taken.

Options:<= /u>

=A0 =A0(1) Nothing<= /span>

=A0 =A0(2) Rely on = transport mechanism (e.g. confirmable CoAP message)

=A0 =A0(3) App-leve= l ACK type

=A0 =A0(4) Use diff= erent flow (i.e. action flow)

=A0

IMHO, different con= trol flow may have different requirement for confirmation message.

=A0 =A0 (1) Action = Flow, needs a App-level confirmation, like Succ/Fail

=A0 =A0 (2) Query F= low, automatically has the confirmation, i.e. the message packet correspond= ing to a specific query.

=A0 =A0 (3) Report = Flow and Event Flow, option (1)-(3) are OK, but I prefer option (1) and (3)= , i.e. the confirmation message is an option, but if a confirmation message= is needed, it should be App-level Ack, instead of transport layer confirmation, which will give 6top more flexibi= lity.

=A0

What do you think?<= /span>

=A0

Thanks

Qin

=A0 = =A0=A0

=A0

_____________________= __________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


--047d7b15ab7f3276d304e5ba93dd-- From xvilajosana@berkeley.edu Fri Sep 6 17:01:42 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E8E6421E80BD for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 17:01:42 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.759 X-Spam-Level: X-Spam-Status: No, score=-2.759 tagged_above=-999 required=5 tests=[AWL=0.217, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 1hZIstKPzEfu for <6tsch@ietfa.amsl.com>; Fri, 6 Sep 2013 17:01:31 -0700 (PDT) Received: from mail-pa0-f52.google.com (mail-pa0-f52.google.com [209.85.220.52]) by ietfa.amsl.com (Postfix) with ESMTP id 0AA6411E80F7 for <6tsch@ietf.org>; Fri, 6 Sep 2013 17:01:30 -0700 (PDT) Received: by mail-pa0-f52.google.com with SMTP id kq13so3953234pab.11 for <6tsch@ietf.org>; Fri, 06 Sep 2013 17:01:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=nxqlegSkxmSGH+brUSo5o03TqIv01KSKZFm3FgRFB/M=; b=Sa3skUqEmoQt+m1FliAklArzide6o0tCI3yu02XYbOIv/Dd741TRsFinRFVGfpw9KA 4IaKH1rOgvSWLtb19gCXqg4RAMSdPL/aq3ODAYkuQCwpafDDFcm6tF+7n2uMS3xAiC/M 6jOcl9LXYUVNhqiLfu4FBBVBFXwOUt8rINc+kboRc0qn5kckNwmB7C3D3nEsJH6X36n3 ZDPm5fV6VbrPCXijeBRf6B2yjY3dJlvTSFJoEyvmwqcsBtYD7gSCZZ/7HZTCOQNMEL/+ UQwZaaBQOclUQJTR3xKMbOfXeh7IOpK2oXiUtYM6L1471HSOLYkMX4bcQXRWgDYqLTRg TwXg== X-Gm-Message-State: ALoCoQmj0QSoi7V0tyDBBlqwW8liIv/aU3k+8LgVf8m1M4/NPeC+eR26SSNE1R1LyJ90KDCLVBSH MIME-Version: 1.0 X-Received: by 10.66.102.1 with SMTP id fk1mr6801100pab.90.1378512089817; Fri, 06 Sep 2013 17:01:29 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Fri, 6 Sep 2013 17:01:29 -0700 (PDT) In-Reply-To: References: Date: Fri, 6 Sep 2013 17:01:29 -0700 Message-ID: From: Xavier Vilajosana Guillen To: "Pascal Thubert (pthubert)" Content-Type: multipart/alternative; boundary=047d7bf18b1c6ead4904e5bfdbed Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 07 Sep 2013 00:01:43 -0000 --047d7bf18b1c6ead4904e5bfdbed Content-Type: text/plain; charset=ISO-8859-1 Hi, I created the scratchpad section in the wiki to keep ideas https://bitbucket.org/6tsch/meetings/wiki/Home and added the flow content information here. https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents have a nice weekend! X On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen < xvilajosana@eecs.berkeley.edu> wrote: > Hi Pascal, it is a good idea! > > I will collect that information and as Thomas put it at the wiki so we do > not lose it. > > :-) > X > > > On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) < > pthubert@cisco.com> wrote: > >> Hello Xavi:**** >> >> ** ** >> >> At the call I mentioned we could use info on tracks and cells as well, >> probably on demand from the PCE.**** >> >> For instance, the PCE could observe energy levels over some cells for a >> while to make sure they are clean.**** >> >> ** ** >> >> What do you think?**** >> >> Pascal**** >> >> ** ** >> >> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >> Behalf Of *Xavier Vilajosana Guillen >> *Sent:* vendredi 6 septembre 2013 01:17 >> *To:* Thomas Watteyne >> *Cc:* 6tsch@ietf.org >> *Subject:* Re: [6tsch] report flow contents**** >> >> ** ** >> >> agreed!**** >> >> So the fields become:**** >> >> ** ** >> >> ** ** >> >> For each known neighbor:**** >> >> -ID**** >> >> -AVG RSSI in a running window**** >> >> -Latest RSSI**** >> >> -AVG LQI in a running window [optional]**** >> >> -Latest LQI [optional]**** >> >> -Num TX packets (option in case there is communication with that >> neighbor)**** >> >> -Num ACK packets (option in case there is communication with that >> neighbor)**** >> >> -Num RX packets (option in case there is communication with that >> neighbor)**** >> >> -Last ASN when it heart about that neighbor **** >> >> -Bundle: Num links in the Schedule to that neighbor**** >> >> -PDR per link [Optional -- or maybe best and worst PDR only]**** >> >> **** >> >> -Option Flag (weather there are optional TLV fields on that category)*** >> * >> >> +(TLV objects)* **** >> >> ** ** >> >> -For each Queue:**** >> >> - Avg Queue length in a running window**** >> >> - Max Queue length in a running window (peak)**** >> >> - Current Queue length (?)**** >> >> - ASN of the oldest packet in the QUEUE?**** >> >> -Option Flag (weather there are optional TLV fields on that category) >> **** >> >> +(TLV objects)* **** >> >> ** ** >> >> -Time source parent**** >> >> -ID**** >> >> -Avg clock drift (correction done) in a running window**** >> >> -Latest clock correction**** >> >> -Parent changes (counter of how many times I changed my time source >> parent)**** >> >> -Option Flag (weather there are optional TLV fields on that category) >> **** >> >> +(TLV objects)* **** >> >> ** ** >> >> -Option Flag (weather there are optional TLV fields in other categories)* >> *** >> >> +(TLV objects)* **** >> >> ** ** >> >> as regards to this:**** >> >> ** ** >> >> "Finally, do you envision a generic mechanism whereby the PCE can turn >> fields on/off, or triggered independently?"**** >> >> ** ** >> >> I see it as CoAP Options, where a set of bytes can be used as "clever >> bitmap" to tell what options are there, the parsing will decode option by >> option and will read the fields. In that way any combination of fields is >> supported.**** >> >> ** ** >> >> would that work?**** >> >> X**** >> >> ** ** >> >> On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote:**** >> >> Xavi,**** >> >> ** ** >> >> Fantastic!**** >> >> ** ** >> >> I believe PDR for each link might be too long to fit in a packet. While >> the mote will most likely keep that information, we could move that to the >> query flow, i.e. it is available to the PCE on-demand.**** >> >> ** ** >> >> Would you agree that the number of links in a bundle belongs to the >> neighbor? Of maybe we want a "bundle" category?**** >> >> ** ** >> >> In queuing, it might be interesting to see the age of the different >> packets, to be able to monitor latency.**** >> >> ** ** >> >> About LQI, there is no general consensus among vendors on what the >> definition is, or how exactly it is calculated. I would make it optional. >> **** >> >> ** ** >> >> Also, it might be good to be able to add arbitrary fields to each >> category: neighbor, queue, time source neighbor.**** >> >> ** ** >> >> Finally, do you envision a generic mechanism whereby the PCE can turn >> fields on/off, or triggered independently?**** >> >> ** ** >> >> Thomas**** >> >> ** ** >> >> On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote:**** >> >> Hi Thomas, Diego,**** >> >> ** ** >> >> I agree that LQI should be there as well. I update here the list with >> Thomas suggestions. **** >> >> ** ** >> >> For each known neighbor:**** >> >> -ID**** >> >> -AVG RSSI in a running window**** >> >> -Latest RSSI**** >> >> -AVG LQI in a running window**** >> >> -Latest LQI**** >> >> -Num TX packets (option in case there is communication with that >> neighbor)**** >> >> -Num ACK packets (option in case there is communication with that >> neighbor)**** >> >> -Num RX packets (option in case there is communication with that >> neighbor)**** >> >> -Last ASN when it heart about that neighbor **** >> >> ** ** >> >> Other fields**** >> >> -Num links in the Schedule to that neighbor**** >> >> -For each link PDR**** >> >> -For each Queue:**** >> >> - Avg Queue length in a running window**** >> >> - Max Queue length in a running window (peak)**** >> >> - Current Queue length (?)**** >> >> -Time source parent**** >> >> -ID**** >> >> -Avg clock drift (correction done) in a running window**** >> >> -Latest clock correction**** >> >> -Parent changes (counter of how many times I changed my time source >> parent)**** >> >> ** ** >> >> -Option Flag (weather there are optional TLV fields)**** >> >> +(TLV objects)* **** >> >> ** ** >> >> ** ** >> >> Hope this makes sense.**** >> >> cheers! >> Xavi**** >> >> ** ** >> >> On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote:**** >> >> *[renamed thread]***** >> >> ** ** >> >> Xavi,**** >> >> ** ** >> >> A few thoughts:**** >> >> - the counters (numTx, etc) will only be present for neighbors the node >> has communicate with, so they should be optional in the packet.**** >> >> - you have focused on the topological information (which I think is the >> right one). It might be useful to gather other data related to >> synchronization or queuing.**** >> >> - I couldn't agree more with your suggestion to make it extensible. This >> does mean that we will need to state somewhere that a device need to ignore >> silently fields it does not understand.**** >> >> ** ** >> >> Thomas**** >> >> ** ** >> >> On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote:**** >> >> Hello, I guess that flows are getting defined and I started to think on >> the contents of the messages on that flows. Not sure if this is the right >> time or I am going way far..**** >> >> ** ** >> >> According to the previous discussion I assume that the five flows are:*** >> * >> >> ** ** >> >> ME-6TOP - Query Flow**** >> >> ME-6TOP - Action Flow**** >> >> ** ** >> >> 6TOP - ME - Report Flow**** >> >> 6TOP - ME - Event Flow**** >> >> 6TOP - ME - Request BW Flow**** >> >> ** ** >> >> I'd like to start defining the content of the messages in the Report Flow: >> **** >> >> ** ** >> >> The Report Flow: has to deal with the information that a node knows and >> has to be sent to the ME so the ME can compute the schedule among others. >> Here I list the information that we can know in a mote and can be used at >> the ME to compute the schedule (complete please if I miss something)**** >> >> ** ** >> >> For each known neighbor:**** >> >> -ID**** >> >> -AVG RSSI in a running window**** >> >> -Latest RSSI**** >> >> -Num TX packets**** >> >> -Num ACK packets**** >> >> -Num RX packets**** >> >> -Last ASN when it heart about that neighbor **** >> >> ** ** >> >> Other fields**** >> >> -Num links in the Schedule to that neighbor**** >> >> -For each link PDR**** >> >> **** >> >> **** >> >> Then we need to have some TLV like objects that can be used for >> ad-hoc/naive/other extensions of the reporting process. In that way we >> don't constraint the implementation of the scheduling alg. to that >> information.**** >> >> ** ** >> >> what do you think?**** >> >> X**** >> >> ** ** >> >> On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote:* >> *** >> >> Hi all,**** >> >> ** ** >> >> In this thread, we will continue the discussion about Confirmation >> message. Here is some background information.**** >> >> ** ** >> >> Context: e.g.**** >> >> - node sends a report and want to know if the report is accepted., ** >> ** >> >> - ME sends a action request and want to know if/when the action taken. >> **** >> >> Options:**** >> >> (1) Nothing**** >> >> (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** >> >> (3) App-level ACK type**** >> >> (4) Use different flow (i.e. action flow)**** >> >> ** ** >> >> IMHO, different control flow may have different requirement for >> confirmation message.**** >> >> (1) Action Flow, needs a App-level confirmation, like Succ/Fail**** >> >> (2) Query Flow, automatically has the confirmation, i.e. the message >> packet corresponding to a specific query.**** >> >> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer >> option (1) and (3), i.e. the confirmation message is an option, but if a >> confirmation message is needed, it should be App-level Ack, instead of >> transport layer confirmation, which will give 6top more flexibility.**** >> >> ** ** >> >> What do you think?**** >> >> ** ** >> >> Thanks**** >> >> Qin**** >> >> **** >> >> ** ** >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> ** ** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> ** ** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> ** ** >> >> ** ** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> ** ** >> > > --047d7bf18b1c6ead4904e5bfdbed Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hi,
I created the scratchpad section in the = wiki to keep ideas
https://bitbucket.org/6tsch/meetings/wiki/Home


and add= ed the flow content information here.

https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents
<= br>
have a nice weekend!
X


On Fri, Sep 6, 2013 at 10:43 AM, Xavier = Vilajosana Guillen <xvilajosana@eecs.berkeley.edu> wrote:
Hi Pascal, it is = a good idea!

I will collect that information and as Thomas put= it at the wiki so we do not lose it.

:-)
X
=


On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) <pthubert@cisco= .com> wrote:

Hello Xavi:

=A0<= /p>

At the call I mentioned w= e could use info on tracks and cells as well, probably on demand from the P= CE.

For instance, the PCE cou= ld observe energy levels over some cells for=A0 a while to make sure they a= re clean.

=A0<= /p>

What do you think?=

Pascal=

=A0<= /p>

From: 6tsch-bounces@ietf.org= [mailto:6t= sch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
Sent: vendredi 6 septembre 2013 01:17
To: Thomas Watteyne
Cc: 6tsch@ietf.o= rg
Subject: Re: [6tsch] report flow contents

=A0

agreed!

So the fields become:

=A0

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window=

=A0-Latest RSSI

=A0-AVG LQI in a running window [optional]=

=A0-Latest LQI [optional]

=A0-Num TX packets (option in case there i= s communication with that neighbor)

=A0-Num ACK packets (option in case there = is communication with that neighbor)

=A0-Num RX packets (option in case there i= s communication with that neighbor)

=A0-Last ASN when it heart about that neig= hbor=A0

=A0-Bundle: Num links in the Schedule to t= hat neighbor

=A0 =A0 =A0 -PDR per link [Optional -- or = maybe best and worst PDR only]

=A0

=A0-Option Flag (weather the= re are optional TLV fields on that category)

=A0 =A0+(TLV objects)*=A0=

=A0

=A0-For each Queue:

=A0 =A0 - Avg Queue length in a running wi= ndow

=A0 =A0 - Max Queue length in a running wi= ndow (peak)

=A0 =A0 - Current Queue length (?)<= u>

=A0 =A0 - ASN of the oldest packet in the = QUEUE?

=A0 =A0 -Option Flag (weather there are op= tional TLV fields on that category)

=A0 =A0 =A0 =A0 +(TLV objects)*=A0<= u>

=A0

-Time source parent

=A0 =A0 -ID

=A0 =A0 -Avg clock drift (correction done)= in a running window

=A0 =A0 -Latest clock correction=

=A0 =A0 -Parent changes (counter of how ma= ny times I changed my time source parent)

=A0 =A0 -Option Flag (weather there are op= tional TLV fields on that category)

=A0 =A0 +(TLV objects)*=A0

=A0

-Option Flag (weather there are optional T= LV fields in other categories)

=A0 =A0+(TLV objects)*=A0

=A0

as regards to this:

=A0

"Finally, do you envision a generic m= echanism whereby the PCE can turn fields on/off, or triggered independently= ?"

=A0

I see it as CoAP Options, where a set of bytes can be used= as "clever bitmap" to tell what options are there, the parsing w= ill decode option by option and will read the fields. In that way any combination of fields is supported.

=A0

would that work?

X

=A0

On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

Xavi,

=A0

Fantastic!

=A0

I believe PDR for each link might be too long to fit= in a packet. While the mote will most likely keep that information, we cou= ld move that to the query flow, i.e. it is available to the PCE on-demand.<= u>

=A0

Would you agree that the number of links in a bundle= belongs to the neighbor? Of maybe we want a "bundle" category?

=A0

In queuing, it might be interesting to see the age o= f the different packets, to be able to monitor latency.

=A0

About LQI, there is no general consensus among vendo= rs on what the definition is, or how exactly it is calculated. I would make= it optional.

=A0

Also, it might be good to be able to add arbitrary f= ields to each category: neighbor, queue, time source neighbor.

=A0

Finally, do you envision a generic mechanism whereby= the PCE can turn fields on/off, or triggered independently?<= /p>

=A0

Thomas

=A0

On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:

Hi Thomas, Diego,

=A0

I agree that LQI should be there as well. I update h= ere the list with Thomas suggestions.=A0

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window=

=A0-Latest RSSI

=A0-AVG LQI in a running window<= /u>

=A0-Latest LQI

=A0-Num TX packets (option in case there i= s communication with that neighbor)

=A0-Num ACK packets (option in case there = is communication with that neighbor)

=A0-Num RX packets (option in case there i= s communication with that neighbor)

=A0-Last ASN when it heart about that neig= hbor=A0

=A0

Other fields

=A0-Num links in the Schedule to that neig= hbor

=A0 =A0 -For each link PDR

=A0-For each Queue:

=A0 =A0 - Avg Queue length in a running window

=A0 =A0 - Max Queue length in a running window (peak= )

=A0 =A0 - Current Queue length (?)

-Time source parent

=A0 =A0 -ID

=A0 =A0 -Avg clock drift (correction done) in a runn= ing window

=A0 =A0 -Latest clock correction

=A0 =A0 -Parent changes (counter of how many times I= changed my time source parent)

=A0

-Option Flag (weather there are optional TLV fields)=

=A0 =A0+(TLV objects)*=A0

=A0

=A0

Hope this makes sense.

cheers!
Xavi

=A0

On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

[renamed thread]=

=A0

Xavi,

=A0

A few thoughts:

- the counters (numTx, etc) will only be = present for neighbors the node has communicate with, so they should be opti= onal in the packet.

- you have focused on the topological inf= ormation (which I think is the right one). It might be useful to gather oth= er data related to synchronization or queuing.

- I couldn't agree more with your sug= gestion to make it extensible. This does mean that we will need to state so= mewhere that a device need to ignore silently fields it does not understand.

=A0

Thomas

=A0

On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:

Hello, I guess that flows are getting defined and I = started to think on the contents of the messages on that flows. Not sure if= this is the right time or I am going way far..

=A0

According to the previous discussion I assume that t= he five flows are:

=A0

ME-6TOP - Query Flow

ME-6TOP - Action Flow

=A0

6TOP - ME - Report Flow

6TOP - ME - Event Flow

6TOP - ME - Request BW Flow

=A0

I'd like to start defining the content of the me= ssages in the Report Flow:

=A0

The Report Flow: has to deal with the information th= at a node knows and has to be sent to the ME so the ME can compute the sche= dule among others. Here I list =A0the information that we can know in a mot= e and can be used at the ME to compute the schedule (complete please if I miss something)

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window

=A0-Latest RSSI

=A0-Num TX packets

=A0-Num ACK packets

=A0-Num RX packets

=A0-Last ASN when it heart about that neighbor=A0=

=A0

Other fields

=A0-Num links in the Schedule to that neighbor

=A0 =A0 -For each link PDR

=A0

=A0

Then we need to have some TLV like objects that can = be used for ad-hoc/naive/other extensions of the reporting process. In that= way we don't constraint the implementation of the scheduling alg. to t= hat information.

=A0

what do you think?

X

=A0

On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi all,

=A0

In this thread, we = will continue the discussion about Confirmation message. Here is some backg= round information.

=A0

Context: e.g.

=A0 =A0 - node send= s a report and want to know if the report is accepted.,=A0=

=A0 =A0 - ME sends = a action request and want to know if/when the action taken.

Options:<= /u>

=A0 =A0(1) Nothing<= /span>

=A0 =A0(2) Rely on = transport mechanism (e.g. confirmable CoAP message)

=A0 =A0(3) App-leve= l ACK type

=A0 =A0(4) Use diff= erent flow (i.e. action flow)

=A0

IMHO, different con= trol flow may have different requirement for confirmation message.

=A0 =A0 (1) Action = Flow, needs a App-level confirmation, like Succ/Fail

=A0 =A0 (2) Query F= low, automatically has the confirmation, i.e. the message packet correspond= ing to a specific query.

=A0 =A0 (3) Report = Flow and Event Flow, option (1)-(3) are OK, but I prefer option (1) and (3)= , i.e. the confirmation message is an option, but if a confirmation message= is needed, it should be App-level Ack, instead of transport layer confirmation, which will give 6top more flexibi= lity.

=A0

What do you think?<= /span>

=A0

Thanks

Qin

=A0 = =A0=A0

=A0

_____________________= __________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0



--047d7bf18b1c6ead4904e5bfdbed-- From twatteyne@gmail.com Sat Sep 7 10:43:28 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 04DD821E804C for <6tsch@ietfa.amsl.com>; Sat, 7 Sep 2013 10:43:28 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.892 X-Spam-Level: X-Spam-Status: No, score=-1.892 tagged_above=-999 required=5 tests=[AWL=0.085, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id EMMpPp-HPU3p for <6tsch@ietfa.amsl.com>; Sat, 7 Sep 2013 10:43:26 -0700 (PDT) Received: from mail-pb0-x233.google.com (mail-pb0-x233.google.com [IPv6:2607:f8b0:400e:c01::233]) by ietfa.amsl.com (Postfix) with ESMTP id 44DE211E8103 for <6tsch@ietf.org>; Sat, 7 Sep 2013 10:43:26 -0700 (PDT) Received: by mail-pb0-f51.google.com with SMTP id jt11so4477714pbb.24 for <6tsch@ietf.org>; Sat, 07 Sep 2013 10:43:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc:content-type; bh=/T9Ut4lXmt5/cErQC1TTjSBru+bXlPjAOsqMHRCj/Cs=; b=j9TtoWwk1qKjamrodCvCyT+F8iWERiThJbt8QljRfM5JHPiDkNIZRXKNRPDVtWJjD9 rJ/ES6fncvKF9kWuHjiv2DXUpwL/WTofGvwumG+qIEIjl9+FJxu1Q4iODNM1Lc2HGoFq f0ojx7AcjE0BjsXOJWWojeZu+b0YMXDiWT3N792UaLopDTuxa0vdjDVYCW72GUUmRc3G w2/Uv0zqEL7NNsmgSPGnMGDZYy6YzrWICw9L1UJic2ms2yjaz4myUJyhwXEExWmB0yTc tuqhNwEtqPSzS1khtdAstWEPWORRD0cYiS7B2+8C66LqqB/X2ysgwyxwd3EYWWu1Lp+D 5+Lw== X-Received: by 10.66.176.143 with SMTP id ci15mr10410061pac.146.1378575806004; Sat, 07 Sep 2013 10:43:26 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Sat, 7 Sep 2013 10:43:05 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Sat, 7 Sep 2013 10:43:05 -0700 X-Google-Sender-Auth: eYuqKF59B-rnG_KZsUlGxvMhEnA Message-ID: To: Xavi Vilajosana Content-Type: multipart/alternative; boundary=047d7bd751603683d504e5ceb1cd Cc: "Pascal Thubert \(pthubert\)" , "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 07 Sep 2013 17:43:28 -0000 --047d7bd751603683d504e5ceb1cd Content-Type: text/plain; charset=ISO-8859-1 Xavi, Great, thanks! Thomas On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen < xvilajosana@eecs.berkeley.edu> wrote: > Hi, > I created the scratchpad section in the wiki to keep ideas > https://bitbucket.org/6tsch/meetings/wiki/Home > > > and added the flow content information here. > > https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents > > have a nice weekend! > X > > > On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote: > >> Hi Pascal, it is a good idea! >> >> I will collect that information and as Thomas put it at the wiki so we do >> not lose it. >> >> :-) >> X >> >> >> On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) < >> pthubert@cisco.com> wrote: >> >>> Hello Xavi:**** >>> >>> ** ** >>> >>> At the call I mentioned we could use info on tracks and cells as well, >>> probably on demand from the PCE.**** >>> >>> For instance, the PCE could observe energy levels over some cells for a >>> while to make sure they are clean.**** >>> >>> ** ** >>> >>> What do you think?**** >>> >>> Pascal**** >>> >>> ** ** >>> >>> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >>> Behalf Of *Xavier Vilajosana Guillen >>> *Sent:* vendredi 6 septembre 2013 01:17 >>> *To:* Thomas Watteyne >>> *Cc:* 6tsch@ietf.org >>> *Subject:* Re: [6tsch] report flow contents**** >>> >>> ** ** >>> >>> agreed!**** >>> >>> So the fields become:**** >>> >>> ** ** >>> >>> ** ** >>> >>> For each known neighbor:**** >>> >>> -ID**** >>> >>> -AVG RSSI in a running window**** >>> >>> -Latest RSSI**** >>> >>> -AVG LQI in a running window [optional]**** >>> >>> -Latest LQI [optional]**** >>> >>> -Num TX packets (option in case there is communication with that >>> neighbor)**** >>> >>> -Num ACK packets (option in case there is communication with that >>> neighbor)**** >>> >>> -Num RX packets (option in case there is communication with that >>> neighbor)**** >>> >>> -Last ASN when it heart about that neighbor **** >>> >>> -Bundle: Num links in the Schedule to that neighbor**** >>> >>> -PDR per link [Optional -- or maybe best and worst PDR only]**** >>> >>> **** >>> >>> -Option Flag (weather there are optional TLV fields on that category)** >>> ** >>> >>> +(TLV objects)* **** >>> >>> ** ** >>> >>> -For each Queue:**** >>> >>> - Avg Queue length in a running window**** >>> >>> - Max Queue length in a running window (peak)**** >>> >>> - Current Queue length (?)**** >>> >>> - ASN of the oldest packet in the QUEUE?**** >>> >>> -Option Flag (weather there are optional TLV fields on that category) >>> **** >>> >>> +(TLV objects)* **** >>> >>> ** ** >>> >>> -Time source parent**** >>> >>> -ID**** >>> >>> -Avg clock drift (correction done) in a running window**** >>> >>> -Latest clock correction**** >>> >>> -Parent changes (counter of how many times I changed my time source >>> parent)**** >>> >>> -Option Flag (weather there are optional TLV fields on that category) >>> **** >>> >>> +(TLV objects)* **** >>> >>> ** ** >>> >>> -Option Flag (weather there are optional TLV fields in other categories) >>> **** >>> >>> +(TLV objects)* **** >>> >>> ** ** >>> >>> as regards to this:**** >>> >>> ** ** >>> >>> "Finally, do you envision a generic mechanism whereby the PCE can turn >>> fields on/off, or triggered independently?"**** >>> >>> ** ** >>> >>> I see it as CoAP Options, where a set of bytes can be used as "clever >>> bitmap" to tell what options are there, the parsing will decode option by >>> option and will read the fields. In that way any combination of fields is >>> supported.**** >>> >>> ** ** >>> >>> would that work?**** >>> >>> X**** >>> >>> ** ** >>> >>> On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne < >>> watteyne@eecs.berkeley.edu> wrote:**** >>> >>> Xavi,**** >>> >>> ** ** >>> >>> Fantastic!**** >>> >>> ** ** >>> >>> I believe PDR for each link might be too long to fit in a packet. While >>> the mote will most likely keep that information, we could move that to the >>> query flow, i.e. it is available to the PCE on-demand.**** >>> >>> ** ** >>> >>> Would you agree that the number of links in a bundle belongs to the >>> neighbor? Of maybe we want a "bundle" category?**** >>> >>> ** ** >>> >>> In queuing, it might be interesting to see the age of the different >>> packets, to be able to monitor latency.**** >>> >>> ** ** >>> >>> About LQI, there is no general consensus among vendors on what the >>> definition is, or how exactly it is calculated. I would make it optional. >>> **** >>> >>> ** ** >>> >>> Also, it might be good to be able to add arbitrary fields to each >>> category: neighbor, queue, time source neighbor.**** >>> >>> ** ** >>> >>> Finally, do you envision a generic mechanism whereby the PCE can turn >>> fields on/off, or triggered independently?**** >>> >>> ** ** >>> >>> Thomas**** >>> >>> ** ** >>> >>> On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < >>> xvilajosana@eecs.berkeley.edu> wrote:**** >>> >>> Hi Thomas, Diego,**** >>> >>> ** ** >>> >>> I agree that LQI should be there as well. I update here the list with >>> Thomas suggestions. **** >>> >>> ** ** >>> >>> For each known neighbor:**** >>> >>> -ID**** >>> >>> -AVG RSSI in a running window**** >>> >>> -Latest RSSI**** >>> >>> -AVG LQI in a running window**** >>> >>> -Latest LQI**** >>> >>> -Num TX packets (option in case there is communication with that >>> neighbor)**** >>> >>> -Num ACK packets (option in case there is communication with that >>> neighbor)**** >>> >>> -Num RX packets (option in case there is communication with that >>> neighbor)**** >>> >>> -Last ASN when it heart about that neighbor **** >>> >>> ** ** >>> >>> Other fields**** >>> >>> -Num links in the Schedule to that neighbor**** >>> >>> -For each link PDR**** >>> >>> -For each Queue:**** >>> >>> - Avg Queue length in a running window**** >>> >>> - Max Queue length in a running window (peak)**** >>> >>> - Current Queue length (?)**** >>> >>> -Time source parent**** >>> >>> -ID**** >>> >>> -Avg clock drift (correction done) in a running window**** >>> >>> -Latest clock correction**** >>> >>> -Parent changes (counter of how many times I changed my time source >>> parent)**** >>> >>> ** ** >>> >>> -Option Flag (weather there are optional TLV fields)**** >>> >>> +(TLV objects)* **** >>> >>> ** ** >>> >>> ** ** >>> >>> Hope this makes sense.**** >>> >>> cheers! >>> Xavi**** >>> >>> ** ** >>> >>> On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < >>> watteyne@eecs.berkeley.edu> wrote:**** >>> >>> *[renamed thread]***** >>> >>> ** ** >>> >>> Xavi,**** >>> >>> ** ** >>> >>> A few thoughts:**** >>> >>> - the counters (numTx, etc) will only be present for neighbors the node >>> has communicate with, so they should be optional in the packet.**** >>> >>> - you have focused on the topological information (which I think is the >>> right one). It might be useful to gather other data related to >>> synchronization or queuing.**** >>> >>> - I couldn't agree more with your suggestion to make it extensible. This >>> does mean that we will need to state somewhere that a device need to ignore >>> silently fields it does not understand.**** >>> >>> ** ** >>> >>> Thomas**** >>> >>> ** ** >>> >>> On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < >>> xvilajosana@eecs.berkeley.edu> wrote:**** >>> >>> Hello, I guess that flows are getting defined and I started to think on >>> the contents of the messages on that flows. Not sure if this is the right >>> time or I am going way far..**** >>> >>> ** ** >>> >>> According to the previous discussion I assume that the five flows are:** >>> ** >>> >>> ** ** >>> >>> ME-6TOP - Query Flow**** >>> >>> ME-6TOP - Action Flow**** >>> >>> ** ** >>> >>> 6TOP - ME - Report Flow**** >>> >>> 6TOP - ME - Event Flow**** >>> >>> 6TOP - ME - Request BW Flow**** >>> >>> ** ** >>> >>> I'd like to start defining the content of the messages in the Report >>> Flow:**** >>> >>> ** ** >>> >>> The Report Flow: has to deal with the information that a node knows and >>> has to be sent to the ME so the ME can compute the schedule among others. >>> Here I list the information that we can know in a mote and can be used at >>> the ME to compute the schedule (complete please if I miss something)**** >>> >>> ** ** >>> >>> For each known neighbor:**** >>> >>> -ID**** >>> >>> -AVG RSSI in a running window**** >>> >>> -Latest RSSI**** >>> >>> -Num TX packets**** >>> >>> -Num ACK packets**** >>> >>> -Num RX packets**** >>> >>> -Last ASN when it heart about that neighbor **** >>> >>> ** ** >>> >>> Other fields**** >>> >>> -Num links in the Schedule to that neighbor**** >>> >>> -For each link PDR**** >>> >>> **** >>> >>> **** >>> >>> Then we need to have some TLV like objects that can be used for >>> ad-hoc/naive/other extensions of the reporting process. In that way we >>> don't constraint the implementation of the scheduling alg. to that >>> information.**** >>> >>> ** ** >>> >>> what do you think?**** >>> >>> X**** >>> >>> ** ** >>> >>> On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote: >>> **** >>> >>> Hi all,**** >>> >>> ** ** >>> >>> In this thread, we will continue the discussion about Confirmation >>> message. Here is some background information.**** >>> >>> ** ** >>> >>> Context: e.g.**** >>> >>> - node sends a report and want to know if the report is accepted., * >>> *** >>> >>> - ME sends a action request and want to know if/when the action >>> taken.**** >>> >>> Options:**** >>> >>> (1) Nothing**** >>> >>> (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** >>> >>> (3) App-level ACK type**** >>> >>> (4) Use different flow (i.e. action flow)**** >>> >>> ** ** >>> >>> IMHO, different control flow may have different requirement for >>> confirmation message.**** >>> >>> (1) Action Flow, needs a App-level confirmation, like Succ/Fail**** >>> >>> (2) Query Flow, automatically has the confirmation, i.e. the message >>> packet corresponding to a specific query.**** >>> >>> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer >>> option (1) and (3), i.e. the confirmation message is an option, but if a >>> confirmation message is needed, it should be App-level Ack, instead of >>> transport layer confirmation, which will give 6top more flexibility.**** >>> >>> ** ** >>> >>> What do you think?**** >>> >>> ** ** >>> >>> Thanks**** >>> >>> Qin**** >>> >>> **** >>> >>> ** ** >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch**** >>> >>> ** ** >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch**** >>> >>> ** ** >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch**** >>> >>> ** ** >>> >>> ** ** >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch**** >>> >>> ** ** >>> >> >> > --047d7bd751603683d504e5ceb1cd Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Xavi,
Great, thanks!
Thomas


On Fri, Sep 6, 201= 3 at 5:01 PM, Xavier Vilajosana Guillen <xvilajosana@eecs.berk= eley.edu> wrote:
Hi,
I created= the scratchpad section in the wiki to keep ideas
https://bitbucket.or= g/6tsch/meetings/wiki/Home


and added the flow content information here.

https://bitbucket.org/6tsch/meetings/wiki/report_flow= _contents

have a nice weekend!
X


On Fri, Sep 6, 2013 at 10:43 AM, Xavier = Vilajosana Guillen <xvilajosana@eecs.berkeley.edu> wrote:
Hi Pascal, it is = a good idea!

I will collect that information and as Thomas put= it at the wiki so we do not lose it.

:-)
X

On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) <pthubert@cisco= .com> wrote:

Hello Xavi:=

=A0<= /p>

At the call I mentioned w= e could use info on tracks and cells as well, probably on demand from the P= CE.

For instance, the PCE cou= ld observe energy levels over some cells for=A0 a while to make sure they a= re clean.

=A0<= /p>

What do you think?=

Pascal=

=A0<= /p>

From: 6tsch-bounces@ietf.org= [mailto:6t= sch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
Sent: vendredi 6 septembre 2013 01:17
To: Thomas Watteyne
Cc: 6tsch@ietf.o= rg
Subject: Re: [6tsch] report flow contents

=A0

agreed!

So the fields become:

=A0

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window=

=A0-Latest RSSI

=A0-AVG LQI in a running window [optional]=

=A0-Latest LQI [optional]

=A0-Num TX packets (option in case there i= s communication with that neighbor)

=A0-Num ACK packets (option in case there = is communication with that neighbor)

=A0-Num RX packets (option in case there i= s communication with that neighbor)

=A0-Last ASN when it heart about that neig= hbor=A0

=A0-Bundle: Num links in the Schedule to t= hat neighbor

=A0 =A0 =A0 -PDR per link [Optional -- or = maybe best and worst PDR only]

=A0

=A0-Option Flag (weather the= re are optional TLV fields on that category)

=A0 =A0+(TLV objects)*=A0=

=A0

=A0-For each Queue:

=A0 =A0 - Avg Queue length in a running wi= ndow

=A0 =A0 - Max Queue length in a running wi= ndow (peak)

=A0 =A0 - Current Queue length (?)<= u>

=A0 =A0 - ASN of the oldest packet in the = QUEUE?

=A0 =A0 -Option Flag (weather there are op= tional TLV fields on that category)

=A0 =A0 =A0 =A0 +(TLV objects)*=A0<= u>

=A0

-Time source parent

=A0 =A0 -ID

=A0 =A0 -Avg clock drift (correction done)= in a running window

=A0 =A0 -Latest clock correction=

=A0 =A0 -Parent changes (counter of how ma= ny times I changed my time source parent)

=A0 =A0 -Option Flag (weather there are op= tional TLV fields on that category)

=A0 =A0 +(TLV objects)*=A0

=A0

-Option Flag (weather there are optional T= LV fields in other categories)

=A0 =A0+(TLV objects)*=A0

=A0

as regards to this:

=A0

"Finally, do you envision a generic m= echanism whereby the PCE can turn fields on/off, or triggered independently= ?"

=A0

I see it as CoAP Options, where a set of bytes can be used= as "clever bitmap" to tell what options are there, the parsing w= ill decode option by option and will read the fields. In that way any combination of fields is supported.

=A0

would that work?

X

=A0

On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <= watteyne@ee= cs.berkeley.edu> wrote:

Xavi,

=A0

Fantastic!

=A0

I believe PDR for each link might be too long to fit= in a packet. While the mote will most likely keep that information, we cou= ld move that to the query flow, i.e. it is available to the PCE on-demand.<= u>

=A0

Would you agree that the number of links in a bundle= belongs to the neighbor? Of maybe we want a "bundle" category?

=A0

In queuing, it might be interesting to see the age o= f the different packets, to be able to monitor latency.

=A0

About LQI, there is no general consensus among vendo= rs on what the definition is, or how exactly it is calculated. I would make= it optional.

=A0

Also, it might be good to be able to add arbitrary f= ields to each category: neighbor, queue, time source neighbor.

=A0

Finally, do you envision a generic mechanism whereby= the PCE can turn fields on/off, or triggered independently?<= /p>

=A0

Thomas

=A0

On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:

Hi Thomas, Diego,

=A0

I agree that LQI should be there as well. I update h= ere the list with Thomas suggestions.=A0

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window=

=A0-Latest RSSI

=A0-AVG LQI in a running window<= /u>

=A0-Latest LQI

=A0-Num TX packets (option in case there i= s communication with that neighbor)

=A0-Num ACK packets (option in case there = is communication with that neighbor)

=A0-Num RX packets (option in case there i= s communication with that neighbor)

=A0-Last ASN when it heart about that neig= hbor=A0

=A0

Other fields

=A0-Num links in the Schedule to that neig= hbor

=A0 =A0 -For each link PDR

=A0-For each Queue:

=A0 =A0 - Avg Queue length in a running window

=A0 =A0 - Max Queue length in a running window (peak= )

=A0 =A0 - Current Queue length (?)

-Time source parent

=A0 =A0 -ID

=A0 =A0 -Avg clock drift (correction done) in a runn= ing window

=A0 =A0 -Latest clock correction

=A0 =A0 -Parent changes (counter of how many times I= changed my time source parent)

=A0

-Option Flag (weather there are optional TLV fields)=

=A0 =A0+(TLV objects)*=A0

=A0

=A0

Hope this makes sense.

cheers!
Xavi

=A0

On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

[renamed thread]=

=A0

Xavi,

=A0

A few thoughts:

- the counters (numTx, etc) will only be = present for neighbors the node has communicate with, so they should be opti= onal in the packet.

- you have focused on the topological inf= ormation (which I think is the right one). It might be useful to gather oth= er data related to synchronization or queuing.

- I couldn't agree more with your sug= gestion to make it extensible. This does mean that we will need to state so= mewhere that a device need to ignore silently fields it does not understand.

=A0

Thomas

=A0

On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:

Hello, I guess that flows are getting defined and I = started to think on the contents of the messages on that flows. Not sure if= this is the right time or I am going way far..

=A0

According to the previous discussion I assume that t= he five flows are:

=A0

ME-6TOP - Query Flow

ME-6TOP - Action Flow

=A0

6TOP - ME - Report Flow

6TOP - ME - Event Flow

6TOP - ME - Request BW Flow

=A0

I'd like to start defining the content of the me= ssages in the Report Flow:

=A0

The Report Flow: has to deal with the information th= at a node knows and has to be sent to the ME so the ME can compute the sche= dule among others. Here I list =A0the information that we can know in a mot= e and can be used at the ME to compute the schedule (complete please if I miss something)

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window

=A0-Latest RSSI

=A0-Num TX packets

=A0-Num ACK packets

=A0-Num RX packets

=A0-Last ASN when it heart about that neighbor=A0=

=A0

Other fields

=A0-Num links in the Schedule to that neighbor

=A0 =A0 -For each link PDR

=A0

=A0

Then we need to have some TLV like objects that can = be used for ad-hoc/naive/other extensions of the reporting process. In that= way we don't constraint the implementation of the scheduling alg. to t= hat information.

=A0

what do you think?

X

=A0

On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:

Hi all,

=A0

In this thread, we = will continue the discussion about Confirmation message. Here is some backg= round information.

=A0

Context: e.g.

=A0 =A0 - node send= s a report and want to know if the report is accepted.,=A0=

=A0 =A0 - ME sends = a action request and want to know if/when the action taken.

Options:<= /u>

=A0 =A0(1) Nothing<= /span>

=A0 =A0(2) Rely on = transport mechanism (e.g. confirmable CoAP message)

=A0 =A0(3) App-leve= l ACK type

=A0 =A0(4) Use diff= erent flow (i.e. action flow)

=A0

IMHO, different con= trol flow may have different requirement for confirmation message.

=A0 =A0 (1) Action = Flow, needs a App-level confirmation, like Succ/Fail

=A0 =A0 (2) Query F= low, automatically has the confirmation, i.e. the message packet correspond= ing to a specific query.

=A0 =A0 (3) Report = Flow and Event Flow, option (1)-(3) are OK, but I prefer option (1) and (3)= , i.e. the confirmation message is an option, but if a confirmation message= is needed, it should be App-level Ack, instead of transport layer confirmation, which will give 6top more flexibi= lity.

=A0

What do you think?<= /span>

=A0

Thanks

Qin

=A0 = =A0=A0

=A0

_____________________= __________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0




--047d7bd751603683d504e5ceb1cd-- From qinwang@berkeley.edu Mon Sep 9 13:58:14 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8741A21F9FED for <6tsch@ietfa.amsl.com>; Mon, 9 Sep 2013 13:58:10 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.038 X-Spam-Level: X-Spam-Status: No, score=0.038 tagged_above=-999 required=5 tests=[BAYES_40=-0.185, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_41=0.6, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zvNLC5vqnxGs for <6tsch@ietfa.amsl.com>; Mon, 9 Sep 2013 13:58:05 -0700 (PDT) Received: from mail-vc0-f175.google.com (mail-vc0-f175.google.com [209.85.220.175]) by ietfa.amsl.com (Postfix) with ESMTP id 046B011E8116 for <6tsch@ietf.org>; Mon, 9 Sep 2013 13:57:47 -0700 (PDT) Received: by mail-vc0-f175.google.com with SMTP id ia10so4294801vcb.20 for <6tsch@ietf.org>; Mon, 09 Sep 2013 13:57:46 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to :content-type; bh=RzzAQNuRzG6xOr/xRdf4jyAHdrDkaDtJyqeUSsjDkLM=; b=FSsYtVFj40of+OTT3cpW+5MVrWIQDqPnnXahsq9M4V9Pi1Qfg58zib6OC1XAfeJ2SZ Kh2orUyxhbWxYhCwCEaGXcImsUw6xpN+nrKGCTbYZShE1UIqcNTFVPgf78nFhPwZoktS LCc5W3ys2S7VuB2uUzm4KK102FDwGGM1FlsjvsTNFhIxGYS2Mq5JwJV4yi+YiVKkyutQ 438041P4jV+3j/GPFE0fBsNZlgIo6HJaVbbxIumQqH/3KHZYrfJTs/ROxZw/9BBlfKq9 4NQVThwV7C2RwTHgmpTqWsFEl/2ZE3PTsuQCiB80dQyCYA0ycWTiYoxbyP+UbTH+wt1y XM8A== X-Gm-Message-State: ALoCoQn/ISo2Hc1Q3L08RmI9qMI5MeVhvhBFpueGM1EC6QX0Ps4kwdRjYpj/oWj5b4EhDYSiuq1/ MIME-Version: 1.0 X-Received: by 10.58.67.9 with SMTP id j9mr3570110vet.22.1378760266325; Mon, 09 Sep 2013 13:57:46 -0700 (PDT) Received: by 10.220.116.135 with HTTP; Mon, 9 Sep 2013 13:57:46 -0700 (PDT) Date: Tue, 10 Sep 2013 04:57:46 +0800 Message-ID: From: Qin Wang To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b339e07e7aeeb04e5f9a3a1 Subject: [6tsch] Is generic management method possible? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Sep 2013 20:58:14 -0000 --047d7b339e07e7aeeb04e5f9a3a1 Content-Type: text/plain; charset=ISO-8859-1 Hi All, In the previous discussion, we have figured out 5 control flows between PCE and node, which were expressed in the context of centralized case. Obviously, it will be great if the messages in those identified control flows are generic, suitable for both centralized and distributed case. During last Friday's call, it was mentioned but is still a open issue. I propose to continue the discussion in this thread. Comparing the role of PCE in centralized case,I think RSVP/NSIS will play similar role in distributed case. In another word, instead of exchanging message with PCE via a network, 6top Management Entity will exchange message with a Reservation Entity like RSVP/NSIS inside the same node. The question is if it is possible to use same design in the two cases. (I'm not expert on RSVP and NSIS, please input your opinions). Firstly, I think the contents of messages in the centralized and distributed case are overlap in a big portion. For example, both of them need to send action flow, both of them need statistics data, and so on. Secondly, in terms of Message Exchange, the two cases are similar. The only difference is, in centralized case, the control messages are carried by CoAP as payload; and in distributed case, the control messages are "sent" via internal pointer. Make sense? Qin --047d7b339e07e7aeeb04e5f9a3a1 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hi All,

In the previous discussion, we = have figured out 5 control flows between PCE and node, which were expressed= in the context of centralized case. Obviously, it will be great if the mes= sages in those identified control flows are generic, suitable for both cent= ralized and distributed case. During last Friday's call, it was mention= ed but is still a open issue. I propose to continue the discussion in this = thread.

Comparing the role of PCE in centralized case,I think R= SVP/NSIS will play similar role in distributed case. In another word, inste= ad of exchanging message with PCE via a network, 6top Management Entity wil= l exchange message with a Reservation Entity like RSVP/NSIS inside the same= node. The question is if it is possible to use same design in the two case= s. =A0(I'm not expert on RSVP and NSIS, please input your opinions).

Firstly, I think the contents of messages in the centra= lized and distributed case are overlap in a big portion. For example, both = of them need to send action flow, both of them need statistics data, and so= on.

Secondly, in terms of Message Exchange, the two cases a= re similar. The only difference is, in centralized case, the control messag= es are carried by CoAP as payload; and in distributed case, the control mes= sages are "sent" via internal pointer.=A0

Make sense?

Qin

=

--047d7b339e07e7aeeb04e5f9a3a1-- From twatteyne@gmail.com Mon Sep 9 21:24:09 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CC20C11E8177 for <6tsch@ietfa.amsl.com>; Mon, 9 Sep 2013 21:24:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.482 X-Spam-Level: X-Spam-Status: No, score=0.482 tagged_above=-999 required=5 tests=[BAYES_20=-0.74, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_41=0.6, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id SM-ouUd1H5PH for <6tsch@ietfa.amsl.com>; Mon, 9 Sep 2013 21:24:09 -0700 (PDT) Received: from mail-pb0-x231.google.com (mail-pb0-x231.google.com [IPv6:2607:f8b0:400e:c01::231]) by ietfa.amsl.com (Postfix) with ESMTP id 5778311E8178 for <6tsch@ietf.org>; Mon, 9 Sep 2013 21:23:57 -0700 (PDT) Received: by mail-pb0-f49.google.com with SMTP id xb4so6925483pbc.8 for <6tsch@ietf.org>; Mon, 09 Sep 2013 21:23:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=WJWNrCpUsSC/omQ5x9zpImS46ei5K5ulXBKN/yZacXw=; b=XD5I8l3v6mIw+sN5RsBv9ha1/3p0KDpKaG5s9D0yB08CLpb2C2Upb4dTJq30tODb4X RGcAcYKDRUBetWmcbze1G1hDvz8COsysAxPodmMgZbvnIq0UFOtW4cJxHgCjQZt/DOte ef3gH/NLZX6PdPB6AQMR4C6oJC9qFY9vw+t31J1osMD0DMPchlMy4l2xnTbg72SPjqlL 4NP8tpxrWQ27zFVCbbPqzQv8FsKM5lQ3wo91eRu+2yqknP8U7z5tsDlQI+QZZPdaw522 HkG8Z2TKrtzWQ7c5LF241bfVOtyekG/7eFXBrnACkxtORjp0/efsDmY2CNpUYuasj0lV 8MHw== X-Received: by 10.66.142.107 with SMTP id rv11mr24179527pab.17.1378787037054; Mon, 09 Sep 2013 21:23:57 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Mon, 9 Sep 2013 21:23:33 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Mon, 9 Sep 2013 21:23:33 -0700 X-Google-Sender-Auth: JgXW2Ja1ViFSua0Z2LRyCV1i-L0 Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=001a11331e46908afa04e5ffdf0f Subject: Re: [6tsch] Is generic management method possible? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Sep 2013 04:24:09 -0000 --001a11331e46908afa04e5ffdf0f Content-Type: text/plain; charset=ISO-8859-1 Qin, I fully agree that being able to reuse some formats in the distributed case is important. The question about the exact protocol to use for negotiation between neighbors in the distributed case is a very broad one. It is too early to discuss that. We can, however, keep the distributed case in mind when proposing formats. Thomas On Mon, Sep 9, 2013 at 1:57 PM, Qin Wang wrote: > Hi All, > > In the previous discussion, we have figured out 5 control flows between > PCE and node, which were expressed in the context of centralized case. > Obviously, it will be great if the messages in those identified control > flows are generic, suitable for both centralized and distributed case. > During last Friday's call, it was mentioned but is still a open issue. I > propose to continue the discussion in this thread. > > Comparing the role of PCE in centralized case,I think RSVP/NSIS will play > similar role in distributed case. In another word, instead of exchanging > message with PCE via a network, 6top Management Entity will exchange > message with a Reservation Entity like RSVP/NSIS inside the same node. The > question is if it is possible to use same design in the two cases. (I'm > not expert on RSVP and NSIS, please input your opinions). > > Firstly, I think the contents of messages in the centralized and > distributed case are overlap in a big portion. For example, both of them > need to send action flow, both of them need statistics data, and so on. > > Secondly, in terms of Message Exchange, the two cases are similar. The > only difference is, in centralized case, the control messages are carried > by CoAP as payload; and in distributed case, the control messages are > "sent" via internal pointer. > > Make sense? > > Qin > > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --001a11331e46908afa04e5ffdf0f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Qin,

I fully agree that being able to r= euse some formats in the distributed case is important. The question about = the exact protocol to use for negotiation between neighbors in the distribu= ted case is a very broad one. It is too early to discuss that. We can, howe= ver, keep the distributed case in mind when proposing formats.

Thomas


On Mon, Sep 9, 2013 at 1:57 PM, Qin Wang <qinw= ang@berkeley.edu> wrote:
Hi All,

= In the previous discussion, we have figured out 5 control flows between PCE= and node, which were expressed in the context of centralized case. Obvious= ly, it will be great if the messages in those identified control flows are = generic, suitable for both centralized and distributed case. During last Fr= iday's call, it was mentioned but is still a open issue. I propose to c= ontinue the discussion in this thread.

Comparing the role of PCE in centralized case,I think R= SVP/NSIS will play similar role in distributed case. In another word, inste= ad of exchanging message with PCE via a network, 6top Management Entity wil= l exchange message with a Reservation Entity like RSVP/NSIS inside the same= node. The question is if it is possible to use same design in the two case= s. =A0(I'm not expert on RSVP and NSIS, please input your opinions).

Firstly, I think the contents of messages in the centra= lized and distributed case are overlap in a big portion. For example, both = of them need to send action flow, both of them need statistics data, and so= on.

Secondly, in terms of Message Exchange, the two cases a= re similar. The only difference is, in centralized case, the control messag= es are carried by CoAP as payload; and in distributed case, the control mes= sages are "sent" via internal pointer.=A0

Make sense?

Qin


=

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--001a11331e46908afa04e5ffdf0f-- From maria-rita.palattella@uni.lu Mon Sep 9 23:46:01 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3F5E021F9BF2 for <6tsch@ietfa.amsl.com>; Mon, 9 Sep 2013 23:46:01 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -5.998 X-Spam-Level: X-Spam-Status: No, score=-5.998 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HTML_MESSAGE=0.001, J_CHICKENPOX_41=0.6, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5bRaIUudvV+U for <6tsch@ietfa.amsl.com>; Mon, 9 Sep 2013 23:45:56 -0700 (PDT) Received: from hercules.uni.lu (hercules.uni.lu [158.64.76.33]) by ietfa.amsl.com (Postfix) with ESMTP id A75EB21E8089 for <6tsch@ietf.org>; Mon, 9 Sep 2013 23:45:55 -0700 (PDT) X-IronPort-AV: E=Sophos;i="4.90,876,1371074400"; d="scan'208,217";a="26399526" Received: from unknown (HELO Travis.uni.lux) ([10.21.2.19]) by hercules.uni.lu with ESMTP; 10 Sep 2013 08:45:52 +0200 Received: from HOSHI.uni.lux ([fe80::499:a33:4e68:4af9]) by Travis.uni.lux ([fe80::653b:7b8e:4641:a750%10]) with mapi id 14.03.0158.001; Tue, 10 Sep 2013 08:45:52 +0200 From: Maria Rita PALATTELLA To: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org> Thread-Topic: [6tsch] Is generic management method possible? Thread-Index: AQHOrZ9gJnQwv5tFIU23+WZxyf9O+Zm+Pj+AgABHoOA= Date: Tue, 10 Sep 2013 06:45:51 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US, en-GB Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.91.0.72] Content-Type: multipart/alternative; boundary="_000_F085911F642A6847987ADA23E611780D1859AB93hoshiunilux_" MIME-Version: 1.0 Subject: Re: [6tsch] Is generic management method possible? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Sep 2013 06:46:01 -0000 --_000_F085911F642A6847987ADA23E611780D1859AB93hoshiunilux_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Qin, I agree too about defining the formats in a way that we can reuse them= for the distributed case. But, for the time being, I would be focused on t= he centralized approach and try to find a solution for it. And then, move t= o the distributed one (that for sure will raise other issues up). Let's try to solve the problems one by one! Maria Rita From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of T= homas Watteyne Sent: Tuesday, September 10, 2013 6:24 AM To: 6tsch@ietf.org Subject: Re: [6tsch] Is generic management method possible? Qin, I fully agree that being able to reuse some formats in the distributed case= is important. The question about the exact protocol to use for negotiation= between neighbors in the distributed case is a very broad one. It is too e= arly to discuss that. We can, however, keep the distributed case in mind wh= en proposing formats. Thomas On Mon, Sep 9, 2013 at 1:57 PM, Qin Wang > wrote: Hi All, In the previous discussion, we have figured out 5 control flows between PCE= and node, which were expressed in the context of centralized case. Obvious= ly, it will be great if the messages in those identified control flows are = generic, suitable for both centralized and distributed case. During last Fr= iday's call, it was mentioned but is still a open issue. I propose to conti= nue the discussion in this thread. Comparing the role of PCE in centralized case,I think RSVP/NSIS will play s= imilar role in distributed case. In another word, instead of exchanging mes= sage with PCE via a network, 6top Management Entity will exchange message w= ith a Reservation Entity like RSVP/NSIS inside the same node. The question = is if it is possible to use same design in the two cases. (I'm not expert = on RSVP and NSIS, please input your opinions). Firstly, I think the contents of messages in the centralized and distribute= d case are overlap in a big portion. For example, both of them need to send= action flow, both of them need statistics data, and so on. Secondly, in terms of Message Exchange, the two cases are similar. The only= difference is, in centralized case, the control messages are carried by Co= AP as payload; and in distributed case, the control messages are "sent" via= internal pointer. Make sense? Qin _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_F085911F642A6847987ADA23E611780D1859AB93hoshiunilux_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Qin, I agree too about de= fining the formats in a way that we can reuse them for the distributed case= . But, for the time being, I would be focused on the centralized approach and try to find a solution for it. And then, move to the distribu= ted one (that for sure will raise other issues up).

Let’s try to solve = the problems one by one!

Maria Rita

 <= /p>

From: 6tsch-bo= unces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Thomas Watteyne
Sent: Tuesday, September 10, 2013 6:24 AM
To: 6tsch@ietf.org
Subject: Re: [6tsch] Is generic management method possible?

 

Qin,

 

I fully agree that being able to reuse some formats = in the distributed case is important. The question about the exact protocol= to use for negotiation between neighbors in the distributed case is a very= broad one. It is too early to discuss that. We can, however, keep the distributed case in mind when proposing fo= rmats.

 

Thomas

 

On Mon, Sep 9, 2013 at 1:57 PM, Qin Wang <qinwang@berkeley.edu= > wrote:

Hi All,

 

In the previous discussion, we have figured out 5 co= ntrol flows between PCE and node, which were expressed in the context of ce= ntralized case. Obviously, it will be great if the messages in those identi= fied control flows are generic, suitable for both centralized and distributed case. During last Friday's call, it w= as mentioned but is still a open issue. I propose to continue the discussio= n in this thread.

 

Comparing the role of PCE in centralized case,I thin= k RSVP/NSIS will play similar role in distributed case. In another word, in= stead of exchanging message with PCE via a network, 6top Management Entity = will exchange message with a Reservation Entity like RSVP/NSIS inside the same node. The question is if it is possi= ble to use same design in the two cases.  (I'm not expert on RSVP and = NSIS, please input your opinions).

 

Firstly, I think the contents of messages in the cen= tralized and distributed case are overlap in a big portion. For example, bo= th of them need to send action flow, both of them need statistics data, and= so on.

 

Secondly, in terms of Message Exchange, the two case= s are similar. The only difference is, in centralized case, the control mes= sages are carried by CoAP as payload; and in distributed case, the control = messages are "sent" via internal pointer. 

 

Make sense?

 

Qin<= /p>

 

 


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

 

--_000_F085911F642A6847987ADA23E611780D1859AB93hoshiunilux_-- From qinwang@berkeley.edu Tue Sep 10 05:49:00 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 29F2E21E8051 for <6tsch@ietfa.amsl.com>; Tue, 10 Sep 2013 05:49:00 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.169 X-Spam-Level: X-Spam-Status: No, score=-1.169 tagged_above=-999 required=5 tests=[AWL=1.207, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_41=0.6, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BeMd7Kf2q0bX for <6tsch@ietfa.amsl.com>; Tue, 10 Sep 2013 05:48:56 -0700 (PDT) Received: from mail-ie0-f175.google.com (mail-ie0-f175.google.com [209.85.223.175]) by ietfa.amsl.com (Postfix) with ESMTP id EBEFB11E80E4 for <6tsch@ietf.org>; Tue, 10 Sep 2013 05:48:55 -0700 (PDT) Received: by mail-ie0-f175.google.com with SMTP id 9so1591633iec.6 for <6tsch@ietf.org>; Tue, 10 Sep 2013 05:48:55 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=EdojhIVDEle86WNHo1pXpRwRtYxLXf+i97TX/2DZg28=; b=EFCcibJwETZItoIc2U7XsAjHGz2KxarO7oMoPeXBO1EAtlAN7ruuGRch9rARNUToPx otqTQTygEnKANXwu6CUcr9ZIMDTzc+Wxmre7I/lEgRxUu/+P53iK/bmt3Oe6OjYfUdfq B02hTc7RrCSEncuBbI7wKo1H4UKQ0ZD9XLdfx3WtUfypCzoHw8AUGFNqeKQAdIv0As9E LZeC39TdB5E12CxEz66wH1J2JvuR3lvXL9g1sMW+wWSuQ4PIQzW29r1HqQpnPenPkWZl cvtcS7Z5YLugPe/ELR+iWO3uQZXfibMgU96I/PTxWwIiNbZH2SIHBUHiuVCk1SVlX9oN h57Q== X-Gm-Message-State: ALoCoQkY1ky//gyf+q20ntnQpFj6+cyv6ATZ2Cr1WwNkOxFxcDaoCirja7B8NvX0dZXCCtLGWAcf MIME-Version: 1.0 X-Received: by 10.50.13.104 with SMTP id g8mr10761504igc.30.1378817335378; Tue, 10 Sep 2013 05:48:55 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Tue, 10 Sep 2013 05:48:55 -0700 (PDT) In-Reply-To: References: Date: Tue, 10 Sep 2013 20:48:55 +0800 Message-ID: From: Qin Wang To: Maria Rita PALATTELLA Content-Type: multipart/alternative; boundary=089e013c69c67c554e04e606ed67 Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] Is generic management method possible? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Sep 2013 12:49:00 -0000 --089e013c69c67c554e04e606ed67 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Thomas and Maria Rita, I totally agree with you that we should focus on centralized approach in the current step. But I cannot see it is very difficult to cover distributed case. Maybe I miss something. To be clear, in my mind, the exchanged messages in distributed case is that between 6top and some Reservation protocol like RSVP/NSIS in upper layer. In another word, it is about exchanging messages inside a node, instead of exchanging messages among neighbors. I don't understand why for different upper layer Reservation protocol, the control flows from/to 6top could be different significantly. Can you explain a little more? Thanks Qin On Tue, Sep 10, 2013 at 2:45 PM, Maria Rita PALATTELLA < maria-rita.palattella@uni.lu> wrote: > Qin, I agree too about defining the formats in a way that we can reuse > them for the distributed case. But, for the time being, I would be focuse= d > on the centralized approach and try to find a solution for it. And then, > move to the distributed one (that for sure will raise other issues up).**= * > * > > Let=92s try to solve the problems one by one! **** > > Maria Rita **** > > ** ** > > *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On Behalf > Of *Thomas Watteyne > *Sent:* Tuesday, September 10, 2013 6:24 AM > *To:* 6tsch@ietf.org > *Subject:* Re: [6tsch] Is generic management method possible?**** > > ** ** > > Qin,**** > > ** ** > > I fully agree that being able to reuse some formats in the distributed > case is important. The question about the exact protocol to use for > negotiation between neighbors in the distributed case is a very broad one= . > It is too early to discuss that. We can, however, keep the distributed ca= se > in mind when proposing formats.**** > > ** ** > > Thomas**** > > ** ** > > On Mon, Sep 9, 2013 at 1:57 PM, Qin Wang wrote:***= * > > Hi All,**** > > ** ** > > In the previous discussion, we have figured out 5 control flows between > PCE and node, which were expressed in the context of centralized case. > Obviously, it will be great if the messages in those identified control > flows are generic, suitable for both centralized and distributed case. > During last Friday's call, it was mentioned but is still a open issue. I > propose to continue the discussion in this thread.**** > > ** ** > > Comparing the role of PCE in centralized case,I think RSVP/NSIS will play > similar role in distributed case. In another word, instead of exchanging > message with PCE via a network, 6top Management Entity will exchange > message with a Reservation Entity like RSVP/NSIS inside the same node. Th= e > question is if it is possible to use same design in the two cases. (I'm > not expert on RSVP and NSIS, please input your opinions).**** > > ** ** > > Firstly, I think the contents of messages in the centralized and > distributed case are overlap in a big portion. For example, both of them > need to send action flow, both of them need statistics data, and so on.**= * > * > > ** ** > > Secondly, in terms of Message Exchange, the two cases are similar. The > only difference is, in centralized case, the control messages are carried > by CoAP as payload; and in distributed case, the control messages are > "sent" via internal pointer. **** > > ** ** > > Make sense?**** > > ** ** > > Qin**** > > ** ** > > ** ** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --089e013c69c67c554e04e606ed67 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hi Thomas and Maria Rita,

I totally agr= ee with you that we should focus on centralized approach in the current ste= p. But I cannot see it is very difficult to cover distributed case. Maybe I= miss something.

To be clear, in my mind, the exchanged messages in dist= ributed case is that between 6top and some Reservation protocol like RSVP/N= SIS in upper layer. In another word, it is about exchanging messages inside= a node, instead of exchanging messages among neighbors. I don't unders= tand why for different upper layer Reservation protocol, the control flows = from/to 6top could be different significantly. Can you explain a little mor= e?

Thanks
Qin



=A0


On Tue, Sep 10, 2013 at 2:45 PM, Maria Rita PALATTEL= LA <maria-rita.palattella@uni.lu> wrote:

Qin, I agree too about de= fining the formats in a way that we can reuse them for the distributed case= . But, for the time being, I would be focused on the centralized approach and try to find a solution for it. And then, move to the distribu= ted one (that for sure will raise other issues up).

Let=92s try to solve the = problems one by one!

Maria Rita

=A0<= /p>

From: 6tsch-bounces@ietf.org= [mailto:6t= sch-bounces@ietf.org] On Behalf Of Thomas Watteyne
Sent: Tuesday, September 10, 2013 6:24 AM
To: 6tsch@ietf.o= rg
Subject: Re: [6tsch] Is generic management method possible?

=A0

Qin,

=A0

I fully agree that being able to reuse some formats = in the distributed case is important. The question about the exact protocol= to use for negotiation between neighbors in the distributed case is a very= broad one. It is too early to discuss that. We can, however, keep the distributed case in mind when proposing fo= rmats.

=A0

Thomas

=A0

On Mon, Sep 9, 2013 at 1:57 PM, Qin Wang <qinwang@berkeley.edu= > wrote:

Hi All,

=A0

In the previous discussion, we have figured out 5 co= ntrol flows between PCE and node, which were expressed in the context of ce= ntralized case. Obviously, it will be great if the messages in those identi= fied control flows are generic, suitable for both centralized and distributed case. During last Friday's call, = it was mentioned but is still a open issue. I propose to continue the discu= ssion in this thread.

=A0

Comparing the role of PCE in centralized case,I thin= k RSVP/NSIS will play similar role in distributed case. In another word, in= stead of exchanging message with PCE via a network, 6top Management Entity = will exchange message with a Reservation Entity like RSVP/NSIS inside the same node. The question is if it is possi= ble to use same design in the two cases. =A0(I'm not expert on RSVP and= NSIS, please input your opinions).

=A0

Firstly, I think the contents of messages in the cen= tralized and distributed case are overlap in a big portion. For example, bo= th of them need to send action flow, both of them need statistics data, and= so on.

=A0

Secondly, in terms of Message Exchange, the two case= s are similar. The only difference is, in centralized case, the control mes= sages are carried by CoAP as payload; and in distributed case, the control = messages are "sent" via internal pointer.=A0

=A0

Make sense?

=A0

Qin

=A0

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--089e013c69c67c554e04e606ed67-- From qinwang@berkeley.edu Tue Sep 10 07:32:58 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 04D6411E81BB for <6tsch@ietfa.amsl.com>; Tue, 10 Sep 2013 07:32:58 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.073 X-Spam-Level: X-Spam-Status: No, score=-2.073 tagged_above=-999 required=5 tests=[AWL=0.903, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GgF8X6t9boX3 for <6tsch@ietfa.amsl.com>; Tue, 10 Sep 2013 07:32:53 -0700 (PDT) Received: from mail-ie0-f170.google.com (mail-ie0-f170.google.com [209.85.223.170]) by ietfa.amsl.com (Postfix) with ESMTP id D81B111E81B8 for <6tsch@ietf.org>; Tue, 10 Sep 2013 07:32:52 -0700 (PDT) Received: by mail-ie0-f170.google.com with SMTP id 17so7356552iea.1 for <6tsch@ietf.org>; Tue, 10 Sep 2013 07:32:52 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to :content-type; bh=PNcN44y/Btk2aw/6Ic8ZEK408MV75jPbvFdAviNFtCI=; b=eQBzE17ZU4aP7rWC2yDwONGJzKh6MUIz70gNSgIz0QvoBC/5n+xqYBN+ZqxQj/MMmG 2aKqtHbppzKElPPoim0lzcy1VFii1wJbwu3MtK/Z9k1mhZRUu3hRU4fpwSJHkgV8MXir +tY6MJSrRZbvfxelfXoy48Mb9rM/6aotw7cqZaqqB1OnIkTA3ZB9jxoDbT6xO/NYKk4M pGTeH5dTaDuPujQiy3BMLvuIjIH31OLOchvSgmRtfZoHNAo1E8e4kCvyQNdkQL2mzh9D k+8olYYeaJ7LNvG5JzcfIC6Jcgv9J2+3TVl+A7D+VmTRCuowL/u5GqbHkQlR+DJByybV oHfQ== X-Gm-Message-State: ALoCoQk2IdF2ICKB/1IjrW2X3nm3bJtaE/kR6Uq9k6t8wBJpQSxz/qXcVgIcHr7hTHZ2dqvN5j7r MIME-Version: 1.0 X-Received: by 10.50.20.195 with SMTP id p3mr10942706ige.26.1378823572315; Tue, 10 Sep 2013 07:32:52 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Tue, 10 Sep 2013 07:32:52 -0700 (PDT) Date: Tue, 10 Sep 2013 22:32:52 +0800 Message-ID: From: Qin Wang To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7bd74b6a3c6ea004e6086109 Subject: [6tsch] mechanism to config Report X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Sep 2013 14:32:58 -0000 --047d7bd74b6a3c6ea004e6086109 Content-Type: text/plain; charset=ISO-8859-1 Hi all, We have had a lot of discussion in thread "report flow contents". As you see, there are many items, but I believe not all of them will be needed in same time base or under same criteria. Thus, a mechanism to config Reports by PCE via Action flow is needed. Here is sort of solution I want to propose. (1) think the contents listed by Xavi in thread "report flow contents" as a part of MIB, and add a configuration field to each attribute, denoted as ReportCriteria. (2) define ReportCriteria as a tuple (Criteria, CriteriaValue) . For example, Criteria =TIME, CriteriaValue=500, means reporting in every 500ms. Criteria = Index of RSSI attribute, CriterValue = some Threshold, means reporting when RSSI is worse than the Threshold. (3) In implementation, the ReportCriteria field in MIB will implemented as events which drive Report Flow and Event Flow. What do you think? Any input is welcome. Thanks Qin --047d7bd74b6a3c6ea004e6086109 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hi all,

We have had a lot of discussion= in thread "report flow contents". As you see, there are many ite= ms, but I believe not all of them will be needed in same time base or under= same criteria. Thus, a mechanism to config Reports by PCE via Action flow = is needed. Here is sort of solution I want to propose.

(1) think the contents listed by Xavi in thread "r= eport flow contents" as a part of MIB, and add a configuration field t= o each attribute, denoted as =A0ReportCriteria.

(2) define ReportCriteria as a tuple (Criteria, CriteriaValue) . For exampl= e,
Criteria =3DTIME, CriteriaValue=3D500, means reporting in ever= y 500ms.
Criteria =3D Index of RSSI attribute, CriterValue =3D so= me Threshold, means reporting when RSSI is worse than the Threshold.

(3) In implementation, the ReportCriteria field in MIB = will implemented as events which drive Report Flow and Event Flow.

What do you think? Any input is welcome.

Thanks
Qin
--047d7bd74b6a3c6ea004e6086109-- From twatteyne@gmail.com Tue Sep 10 10:17:24 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B23D021F9951 for <6tsch@ietfa.amsl.com>; Tue, 10 Sep 2013 10:17:24 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.448 X-Spam-Level: X-Spam-Status: No, score=-0.448 tagged_above=-999 required=5 tests=[AWL=0.929, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_41=0.6, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id dUmpH7r7V1m5 for <6tsch@ietfa.amsl.com>; Tue, 10 Sep 2013 10:17:23 -0700 (PDT) Received: from mail-pa0-x235.google.com (mail-pa0-x235.google.com [IPv6:2607:f8b0:400e:c03::235]) by ietfa.amsl.com (Postfix) with ESMTP id 945D921F994A for <6tsch@ietf.org>; Tue, 10 Sep 2013 10:17:22 -0700 (PDT) Received: by mail-pa0-f53.google.com with SMTP id lb1so7953340pab.40 for <6tsch@ietf.org>; Tue, 10 Sep 2013 10:17:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=Q+Y1+jEcgLyEz4xDwVdQk+XvK1Lh/uw50ql3T7iF2+Y=; b=JHqeCTlSJ46UGN1O9A6UrDxEPgod+N2X7E4Cm6SN/BcNZovJyniD2ORrE+1y8WLjzJ N92sgPbImTB+ee38YRrWSq5u6FuesqWUDJnqYpOCih7IpqozC4b6tyNQdo+M+CrvFqEI 7ADzzpCoiT04tkkxDtVD0KQW58NH+KkOgyFoVQcO71SAN29E2vaYDnGmBtE11prJnums m8eaOBA/KB9Thk4QCPMkqZzM5IKZkZh9Cw/eCCjxvQB2iRfdrWQRtRA3set7jjG5Ptv/ HVYkf3vXIpx4Rc4QgK4YgnmkcgofKq68JzEP47Ax3kx9hg5yhjhqh3WaDL/YiUkcyUI5 mQow== X-Received: by 10.66.248.161 with SMTP id yn1mr28128237pac.0.1378833442255; Tue, 10 Sep 2013 10:17:22 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Tue, 10 Sep 2013 10:17:01 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Tue, 10 Sep 2013 10:17:01 -0700 X-Google-Sender-Auth: CB6NnHMEsusWfjfSHLc262-SiDo Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b15b04387b90204e60aad55 Subject: Re: [6tsch] Is generic management method possible? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Sep 2013 17:17:24 -0000 --047d7b15b04387b90204e60aad55 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Qin, I think we all largely agree. What follows is some context to make entirely sure we're talking about the same thing. It's written in -vv mode, so please be patient. The following illustrates the different interactions. +-----+ +--------------------+ +--------------------+ | PCE |<=3D=3D*(3)*=3D=3D>| 6top ME ^ | | = | +-----+ +---------------|----+ +--------------------+ | CoAP | | | CoAP | +-------------- | ---+ +--------------------+ | . *(1)* | | . | | . | | | . | +-------------- | ---+ +--------------------+ | 6top V |<=3D=3D*(2)*=3D=3D>| 6top = | +--------------------+ +--------------------+ | IEEE802.15.4e TSCH | | IEEE802.15.4e TSCH | +--------------------+ +--------------------+ 6top is a sublayer which lives above MAC. It is described in http://tools.ietf.org/html/draft-wang-6tsch-6top-00 and defines *(1)* the hooks for an upper layer to interact with the TSCH schedule and *(2)* a negotiation mechanism between two nodes to manage soft cells allocation. * (1)* is used by the 6top management entity (6top ME). *(2)* is used by neighbor nodes to manage soft cells. In a centralized case, the PCE talks to the 6top ME over some application-level protocol *(3)*. While this is still in debate, CoAP looks like an interesting choice (Raghu and Xavi will be leading a discussion about CoAP during this Friday's call). About the different interactions depicted above: - The discussion about the flows we had last week deals with *(3)*. We identified 5 flows, and started discussing the contents of the report flows, as captured in https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents. - The interaction marked *(1)* is inside the mote. Since it does not involve sending bytes over the air, I would argue that it is implementation-specific, and out of scope of what we want to standardize= . And while http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.= 4 defines a set of commands, an implementation will be compliant as long as it trigger the correct "over-the-air" behavior. - Since we are working on the centralized case first, and that it makes most sense to use hard cells in the centralized case, *(2)* hasn't received much attention lately. I believe that we should keep what's defined in http://tools.ietf.org/html/draft-wang-6tsch-6top-00 and resume working on it when we tackle the distributed case. Coming back to our discussion about formats, I expect a packet of interaction to look *(3)* something like: +------...-------+------+---------+ | several header | CoAP | *payload* | +------...-------+------+---------+ CoAP will give us "services" such as resource and URIs, method (GET/POST/PUT/DELETE) and optional confirmable messages. Using those simply means that the 6top ME will not have to re-define those "services", hence that the format of the *payload* gets simpler. CoAP is also "application-agnostic", i.e. it just transports the *payload* between two end-points, without knowing anything about what that *payload* contains. The distributed case is a different problem. We are talking about using protocols such as RSVP/NSIS, which are more than just "transporting" data, since they come with precise interaction models. Given this, I would argue that we will not be able to reuse the exact same *payload* format. That being said, it we opt for flexible encoding of generic information such as "a request for bandwidth", or "a statistic about cell usage", we might be able to reuse those as building blocks whenever needed by RSVP/NSIS (or a simpler version thereof). I believe in the JSON/BSON/CBOR path we are following, and that it will give us the re-usability we are looking for. Is this in line with what you're thinking? Thomas On Tue, Sep 10, 2013 at 5:48 AM, Qin Wang wrote: > Hi Thomas and Maria Rita, > > I totally agree with you that we should focus on centralized approach in > the current step. But I cannot see it is very difficult to cover > distributed case. Maybe I miss something. > > To be clear, in my mind, the exchanged messages in distributed case is > that between 6top and some Reservation protocol like RSVP/NSIS in upper > layer. In another word, it is about exchanging messages inside a node, > instead of exchanging messages among neighbors. I don't understand why fo= r > different upper layer Reservation protocol, the control flows from/to 6to= p > could be different significantly. Can you explain a little more? > > Thanks > Qin > > > > > > > On Tue, Sep 10, 2013 at 2:45 PM, Maria Rita PALATTELLA < > maria-rita.palattella@uni.lu> wrote: > >> Qin, I agree too about defining the formats in a way that we can reuse >> them for the distributed case. But, for the time being, I would be focus= ed >> on the centralized approach and try to find a solution for it. And then, >> move to the distributed one (that for sure will raise other issues up).*= * >> ** >> >> Let=92s try to solve the problems one by one! **** >> >> Maria Rita **** >> >> ** ** >> >> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >> Behalf Of *Thomas Watteyne >> *Sent:* Tuesday, September 10, 2013 6:24 AM >> *To:* 6tsch@ietf.org >> *Subject:* Re: [6tsch] Is generic management method possible?**** >> >> ** ** >> >> Qin,**** >> >> ** ** >> >> I fully agree that being able to reuse some formats in the distributed >> case is important. The question about the exact protocol to use for >> negotiation between neighbors in the distributed case is a very broad on= e. >> It is too early to discuss that. We can, however, keep the distributed c= ase >> in mind when proposing formats.**** >> >> ** ** >> >> Thomas**** >> >> ** ** >> >> On Mon, Sep 9, 2013 at 1:57 PM, Qin Wang wrote:**= * >> * >> >> Hi All,**** >> >> ** ** >> >> In the previous discussion, we have figured out 5 control flows between >> PCE and node, which were expressed in the context of centralized case. >> Obviously, it will be great if the messages in those identified control >> flows are generic, suitable for both centralized and distributed case. >> During last Friday's call, it was mentioned but is still a open issue. I >> propose to continue the discussion in this thread.**** >> >> ** ** >> >> Comparing the role of PCE in centralized case,I think RSVP/NSIS will pla= y >> similar role in distributed case. In another word, instead of exchanging >> message with PCE via a network, 6top Management Entity will exchange >> message with a Reservation Entity like RSVP/NSIS inside the same node. T= he >> question is if it is possible to use same design in the two cases. (I'm >> not expert on RSVP and NSIS, please input your opinions).**** >> >> ** ** >> >> Firstly, I think the contents of messages in the centralized and >> distributed case are overlap in a big portion. For example, both of them >> need to send action flow, both of them need statistics data, and so on.*= * >> ** >> >> ** ** >> >> Secondly, in terms of Message Exchange, the two cases are similar. The >> only difference is, in centralized case, the control messages are carrie= d >> by CoAP as payload; and in distributed case, the control messages are >> "sent" via internal pointer. **** >> >> ** ** >> >> Make sense?**** >> >> ** ** >> >> Qin**** >> >> ** ** >> >> ** ** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> ** ** >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > --047d7b15b04387b90204e60aad55 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable --047d7b15b04387b90204e60aad55-- From xvilajosana@berkeley.edu Tue Sep 10 10:52:38 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 674A921F918C for <6tsch@ietfa.amsl.com>; Tue, 10 Sep 2013 10:52:38 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.976 X-Spam-Level: X-Spam-Status: No, score=-1.976 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YpmSYlt7LpZD for <6tsch@ietfa.amsl.com>; Tue, 10 Sep 2013 10:52:32 -0700 (PDT) Received: from mail-pd0-f170.google.com (mail-pd0-f170.google.com [209.85.192.170]) by ietfa.amsl.com (Postfix) with ESMTP id A61F821F90CC for <6tsch@ietf.org>; Tue, 10 Sep 2013 10:52:32 -0700 (PDT) Received: by mail-pd0-f170.google.com with SMTP id x10so8005463pdj.29 for <6tsch@ietf.org>; Tue, 10 Sep 2013 10:52:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=xnTkmsi1gUpKDFhCOBCerDHSHS1438h3wvFZEQziUzw=; b=D/9mKayoQzS1HqmgQAD6Gd2t39Hw2rUGDjSYet8LoHq5ukwx/BzG0rHR80ktUGNT8F blqb6tCn5EDFwXl2fdpFwOeWkLR9lZOpSjClOcgQlR9y/rHZnzRulsydnIJ5eQuC7E0E OPp0UCJuKFjniKtukPG/HxoPd4lbEo5IhRsBMDn91PCKOMe1ByTQ4kxA4eCDl/xVqhuu vyheAiRvQfYhBe6l/07fNd0KwhTWIirprS104ybn1erL2XPkvFAKAS/xbnI5k26Z5Cy3 rkY1/kEE/PUVankJKFIdcGzcOH7/p0tOZF7g/G8ld7xZmOPEcc6/A0Fg70+9j177nT54 DVWA== X-Gm-Message-State: ALoCoQm+xvh4mmu+4sPmrwepAJx8zHShAEg2eed5sjqmXwDL0X9fTQRN8lUvEgvfyfnsBC/k3kB8 MIME-Version: 1.0 X-Received: by 10.66.162.136 with SMTP id ya8mr15921324pab.110.1378835550259; Tue, 10 Sep 2013 10:52:30 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Tue, 10 Sep 2013 10:52:30 -0700 (PDT) In-Reply-To: References: Date: Tue, 10 Sep 2013 10:52:30 -0700 Message-ID: From: Xavier Vilajosana Guillen To: "Pascal Thubert (pthubert)" Content-Type: multipart/alternative; boundary=047d7b86e4242d5a2f04e60b2be7 Cc: Thomas Watteyne , 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] Zero Objective Function discussion X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Sep 2013 17:52:38 -0000 --047d7b86e4242d5a2f04e60b2be7 Content-Type: text/plain; charset=ISO-8859-1 Hi all, after some study I agree that we can use the RFC6552 in the minimal 6TiSCH configuration. I would like to call for approval or more input from others before I consolidate the text in the draft. I put here an example following Pascal suggestion: Given Rf = 1 Sp = 2* ETX Sr = 0 minHopRankIncrease = 256 (default in RPL) ETX=(xmit/ack) r(n) = r(p) + rank_increase rank_increase= (Rf*Sp + Sr) * minHopRankIncrease rank_increase=(512*xmit/ack) if we take 5 hops (95 are supported) network and r(0)=0 and xmit=100 and ack=75 for all nodes r(1)=r(0)+rank_increase = 0+683 with f=0 r(2)=r(1)+683=1366 with f=1 r(3)=r(2)+683=2049 with f=2 r(4)=r(3)+683=2732 with f=2 r(5)=r(4)+683=3415 with f=3 ... etc... so f is monotonically increasing and the rank function enables more than enough hops. Please provide feedback. cheers! Xavi --047d7b86e4242d5a2f04e60b2be7 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hi all,

after some study I agree that we can u= se the RFC6552 in the minimal 6TiSCH configuration. I would like to call fo= r approval or more input from others before I consolidate the text in the d= raft.

I put here an example following Pascal suggestion:

Given
Rf =3D 1
Sp =3D 2* ETX
Sr =3D 0
minHopRankIncrease =3D 256 (defa= ult in RPL)
ETX=3D(xmit/ack)

r(n) =3D= r(p) + rank_increase
rank_increase=3D (Rf*Sp + Sr) * minHopRankIncrease
rank_increase= =3D(512*xmit/ack)


if we take 5 hops (95 are supported) network a= nd r(0)=3D0 and xmit=3D100 and ack=3D75 for all nodes

r(1)=3Dr(0)+ra= nk_increase =3D 0+683 with f=3D0
r(2)=3Dr(1)+683=3D1366 with f=3D1
r(3)=3Dr(2)+683=3D2049 with f=3D2
r= (4)=3Dr(3)+683=3D2732 with f=3D2
r(5)=3Dr(4)+683=3D3415 with f=3D3
..= .
etc...

so f is monotonically increasing and the rank function e= nables more than enough hops.

Please provide feedback.

cheers!
Xavi
=A0
--047d7b86e4242d5a2f04e60b2be7-- From twatteyne@gmail.com Tue Sep 10 11:30:27 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CD99D11E8121 for <6tsch@ietfa.amsl.com>; Tue, 10 Sep 2013 11:30:27 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.212 X-Spam-Level: X-Spam-Status: No, score=-1.212 tagged_above=-999 required=5 tests=[AWL=0.765, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id hvUDemlUEcKk for <6tsch@ietfa.amsl.com>; Tue, 10 Sep 2013 11:30:26 -0700 (PDT) Received: from mail-pa0-x233.google.com (mail-pa0-x233.google.com [IPv6:2607:f8b0:400e:c03::233]) by ietfa.amsl.com (Postfix) with ESMTP id C269311E811B for <6tsch@ietf.org>; Tue, 10 Sep 2013 11:30:26 -0700 (PDT) Received: by mail-pa0-f51.google.com with SMTP id lf1so8170268pab.10 for <6tsch@ietf.org>; Tue, 10 Sep 2013 11:30:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=YzKvJs+UTmNFlV7WDGl9PLNGTPAgBbbMgXgO95X/2l4=; b=gTdm/fQqdXZos3fUBsjjQC07E22QK/sVreTrpJeNJc+55N7BHcy/+LMFFpfVt/zu+G G4tYuKu5HoMpTW1eggj+p/mrqLriEaXOaY4Kj/Xu+MYnU+943pUBxyZcJur7OZMfODDH JSxYWJca1CNwOXkExYYT2+C54fDu42+vDYA7SfVDtdJoivQGAAI3w8wd0WNsjDmd9pch qoS2ckxAxWpNvg3yT52CjSr0gJ0LzaXYWxPbVKP1pO3iN6Y6VUq4Lx/zrRu4zM5c2dRT dDERhXTdBQfGJACrEUZSigaANOEcjLrsTzs0nupvR2ocFpJxnSlj422tNAZb/HUeJF// yEOw== X-Received: by 10.66.219.41 with SMTP id pl9mr3480604pac.187.1378837826443; Tue, 10 Sep 2013 11:30:26 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Tue, 10 Sep 2013 11:30:06 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Tue, 10 Sep 2013 11:30:06 -0700 X-Google-Sender-Auth: 8iNVQ3_QVHbP4mivGlHcBdmkpb0 Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b5da81fd91f7f04e60bb23a Subject: Re: [6tsch] mechanism to config Report X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Sep 2013 18:30:27 -0000 --047d7b5da81fd91f7f04e60bb23a Content-Type: text/plain; charset=ISO-8859-1 Qin, I fully second the idea of being able to configure the reporting. There are many possible metrics that can be reported (see https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents). There should be a mechanism to configure the report rate of multiple at the same time. Maybe we could use the notion of URI and (sub)resources. That is, issuing a CoAP POST to /6top/r will configure all reporting, but only the neighbor when issuing it to /6top/r/n. Just an idea. The contents of the POST would contains the criteria and value. We might define a number of generic criteria (period, lessThan, greaterThan, equalTo, onAdd, onDelete), and leave some open for "exotic" uses that only apply to specific metric. For example, "only when more than 3 neighbors". Thomas On Tue, Sep 10, 2013 at 7:32 AM, Qin Wang wrote: > Hi all, > > We have had a lot of discussion in thread "report flow contents". As you > see, there are many items, but I believe not all of them will be needed in > same time base or under same criteria. Thus, a mechanism to config Reports > by PCE via Action flow is needed. Here is sort of solution I want to > propose. > > (1) think the contents listed by Xavi in thread "report flow contents" as > a part of MIB, and add a configuration field to each attribute, denoted as > ReportCriteria. > > (2) define ReportCriteria as a tuple (Criteria, CriteriaValue) . For > example, > Criteria =TIME, CriteriaValue=500, means reporting in every 500ms. > Criteria = Index of RSSI attribute, CriterValue = some Threshold, means > reporting when RSSI is worse than the Threshold. > > (3) In implementation, the ReportCriteria field in MIB will implemented as > events which drive Report Flow and Event Flow. > > What do you think? Any input is welcome. > > Thanks > Qin > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --047d7b5da81fd91f7f04e60bb23a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Qin,

I fully second the idea of being a= ble to configure the reporting.

There are many pos= sible metrics that can be reported (see=A0https://bitbuck= et.org/6tsch/meetings/wiki/report_flow_contents). There should be a mec= hanism to configure the report rate of multiple at the same time. Maybe we = could use the notion of URI and (sub)resources. That is, issuing a CoAP POS= T to /6top/r will configure al= l reporting, but only the neighbor when issuing it to=A0/6top/r/n. Just an idea.

The contents of the POST would contains the criteria an= d value. We might define a number of generic criteria (period, lessThan, gr= eaterThan, equalTo, onAdd, onDelete), and leave some open for "exotic&= quot; uses that only apply to specific metric. For example, "only when= more than 3 neighbors".

Thomas

On Tue, Sep 10, 2013 at 7:32 AM, Qin Wang <qinwang@ber= keley.edu> wrote:
Hi all,

We have had a lot of discussion= in thread "report flow contents". As you see, there are many ite= ms, but I believe not all of them will be needed in same time base or under= same criteria. Thus, a mechanism to config Reports by PCE via Action flow = is needed. Here is sort of solution I want to propose.

(1) think the contents listed by Xavi in thread "r= eport flow contents" as a part of MIB, and add a configuration field t= o each attribute, denoted as =A0ReportCriteria.

(2) define ReportCriteria as a tuple (Criteria, CriteriaValue) . For exampl= e,
Criteria =3DTIME, CriteriaValue=3D500, means reporting in ever= y 500ms.
Criteria =3D Index of RSSI attribute, CriterValue =3D so= me Threshold, means reporting when RSSI is worse than the Threshold.

(3) In implementation, the ReportCriteria field in MIB = will implemented as events which drive Report Flow and Event Flow.

What do you think? Any input is welcome.

Thanks
Qin
<= /span>

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--047d7b5da81fd91f7f04e60bb23a-- From pthubert@cisco.com Tue Sep 10 12:09:01 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B252311E81B0 for <6tsch@ietfa.amsl.com>; Tue, 10 Sep 2013 12:09:01 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.598 X-Spam-Level: X-Spam-Status: No, score=-10.598 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 74zz-nr6dWZl for <6tsch@ietfa.amsl.com>; Tue, 10 Sep 2013 12:08:56 -0700 (PDT) Received: from rcdn-iport-3.cisco.com (rcdn-iport-3.cisco.com [173.37.86.74]) by ietfa.amsl.com (Postfix) with ESMTP id 3A3D321F9A61 for <6tsch@ietf.org>; Tue, 10 Sep 2013 12:08:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=14935; q=dns/txt; s=iport; t=1378840136; x=1380049736; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=vBgUeD6joaFA5+7SJPI2DDCte8GJcquq7ocqn+XSNE8=; b=VMW1i06/fRJLE/ky7fhaoOQjC19eyOL9EJKLhC47WhKYgUBbuUscAk3J cx7kvgtroxyAyTh38cgHGDonwTQ8JXUdDcFqyimc+RkYeIcP1mr2n6SYx jg08HruJu6BmxXTtXFth9f4PgZKl81bZo3qTKKLSfBg7ZJH9aHvaXYM91 I=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Au4GAPdsL1KtJXHB/2dsb2JhbABbDoI1RDhRuXyIR4EmFm0HgiUBAQEEHRBFBxACAQgRBAEBCx0HMhQJCAIEDgUIh3oMwkCPKjEGAYMdgQADhUyTWZA8gmE/gio X-IronPort-AV: E=Sophos;i="4.90,879,1371081600"; d="scan'208,217";a="258009943" Received: from rcdn-core2-6.cisco.com ([173.37.113.193]) by rcdn-iport-3.cisco.com with ESMTP; 10 Sep 2013 19:08:55 +0000 Received: from xhc-aln-x10.cisco.com (xhc-aln-x10.cisco.com [173.36.12.84]) by rcdn-core2-6.cisco.com (8.14.5/8.14.5) with ESMTP id r8AJ8tvp030823 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Tue, 10 Sep 2013 19:08:55 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-aln-x10.cisco.com ([173.36.12.84]) with mapi id 14.02.0318.004; Tue, 10 Sep 2013 14:08:54 -0500 From: "Pascal Thubert (pthubert)" To: "xvilajosana@eecs.berkeley.edu" Thread-Topic: [6tsch] Zero Objective Function discussion Thread-Index: AQHOrk6Gtb6ROlh65EK+zZJeGKtxe5m/RIaA Date: Tue, 10 Sep 2013 19:08:53 +0000 Deferred-Delivery: Tue, 10 Sep 2013 19:08:00 +0000 Message-ID: References: In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.61.85.35] Content-Type: multipart/alternative; boundary="_000_E045AECD98228444A58C61C200AE1BD8414615AExmbrcdx01ciscoc_" MIME-Version: 1.0 Cc: Thomas Watteyne , 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] Zero Objective Function discussion X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Sep 2013 19:09:01 -0000 --_000_E045AECD98228444A58C61C200AE1BD8414615AExmbrcdx01ciscoc_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hello Xavi: Great! I'd add the following: RFC 6550 3.5.1. Rank C= omparison (DAGRank())has: " When an Objective Function computes Rank, the Objective Function operates on the entire (i.e., 16-bit) Rank quantity. When Rank is compared, e.g., for determination of parent relationships or loop detection, the integer portion of the Rank is to be used. The integer portion of the Rank is computed by the DAGRank() macro as follows, where floor(x) is the function that evaluates to the greatest integer less than or equal to x: DAGRank(rank) =3D floor(rank/MinHopRankIncrease) For example, if a 16-bit Rank quantity is decimal 27, and the MinHopRankIncrease is decimal 16, then DAGRank(27) =3D floor(1.6875) =3D 1. The integer part of the Rank is 1 and the fractional part is 11/16. " DAGRank(rank) is what we expect to place in the Flow label and the join pri= ority. In our case: r(1)=3Dr(0)+rank_increase =3D 0+683 =3D> DAGRank(rank) =3D 2 r(2)=3Dr(1)+683=3D1366 =3D> DAGRank= (rank) =3D 5 r(3)=3Dr(2)+683=3D2049 =3D> DAGRank= (rank) =3D 8 r(4)=3Dr(3)+683=3D2732 =3D> DAGRank= (rank) =3D 10 r(5)=3Dr(4)+683=3D3415 =3D> DAGRank= (rank) =3D 13 We see that the DAGRank() always increases at least by one. This is the des= ired property so as to ensure that we can detect loop with just one octet i= n the flow label. Note that the real 2 octets Rank does not lose the rounding info since the = DIP always passes 2 octets. Cheers, Pascal From: Xavier Vilajosana Guillen [mailto:xvilajosana@eecs.berkeley.edu] Sent: mardi 10 septembre 2013 19:53 To: Pascal Thubert (pthubert) Cc: Thomas Watteyne; 6TSCH Subject: Re: [6tsch] Zero Objective Function discussion Hi all, after some study I agree that we can use the RFC6552 in the minimal 6TiSCH = configuration. I would like to call for approval or more input from others = before I consolidate the text in the draft. I put here an example following Pascal suggestion: Given Rf =3D 1 Sp =3D 2* ETX Sr =3D 0 minHopRankIncrease =3D 256 (default in RPL) ETX=3D(xmit/ack) r(n) =3D r(p) + rank_increase rank_increase=3D (Rf*Sp + Sr) * minHopRankIncrease rank_increase=3D(512*xmit/ack) if we take 5 hops (95 are supported) network and r(0)=3D0 and xmit=3D100 an= d ack=3D75 for all nodes r(1)=3Dr(0)+rank_increase =3D 0+683 with f=3D0 r(2)=3Dr(1)+683=3D1366 with f=3D1 r(3)=3Dr(2)+683=3D2049 with f=3D2 r(4)=3Dr(3)+683=3D2732 with f=3D2 r(5)=3Dr(4)+683=3D3415 with f=3D3 ... etc... so f is monotonically increasing and the rank function enables more than en= ough hops. Please provide feedback. cheers! Xavi --_000_E045AECD98228444A58C61C200AE1BD8414615AExmbrcdx01ciscoc_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hello Xavi:

 <= /p>

Great!<= /p>

 <= /p>

I’d add the followi= ng:

 <= /p> 

RFC 6550    3.5.1. Rank Compa=
rison (DAGRank())has:

“= 

When an Objective Function computes Rank, the Objective Function<=
/o:p>
   operates on the entire (i.e., 16-bit) Rank quantity. =
; When Rank is
   compared, e.g., for determination of parent relationships=
 or loop
   detection, the integer portion of the Rank is to be used.=
  The
   integer portion of the Rank is computed by the DAGRank() =
macro as
   follows, where floor(x) is the function that evaluates to=
 the
   greatest integer less than or equal to x:

 


           &nbs=
p;  DAGRank(rank) =3D floor(rank/MinHopRankIncrease)


 


   For example, if a 16-bit Rank quantity is decimal 27, and=
 the


   MinHopRankIncrease is decimal 16, then DAGRank(27) =3D fl=
oor(1.6875) =3D


   1.  The integer part of the Rank is 1 and the fracti=
onal part is


   11/16.


 <=
/p>

“=



DAGRank(rank) is what we =
expect to place in the Flow label and the join priority.<=
/p>

In our case:


 <=
/p>

r(1)=3Dr(0)+rank_incr=
ease =3D 0+683          &n=
bsp;    =3D> DAGRank(rank) =3D 2


r(2)=3Dr(1)+683=3D136=
6             &=
nbsp;           &nbs=
p;            &=
nbsp;  =3D> DAGRank(rank) =3D 5


r(3)=3Dr(2)+683=3D204=
9             &=
nbsp;            &nb=
sp;            =
  =3D> DAGRank(rank) =3D 8


r(4)=3Dr(3)+683=3D273=
2              =
            &nb=
sp;            =
  =3D> DAGRank(rank) =3D 10


r(5)=3Dr(4)+683=3D341=
5             &=
nbsp;           &nbs=
p;            &=
nbsp;  =3D> DAGRank(rank) =3D 13


 <=
/p>

We see that the DAGRank()=
 always increases at least by one. This is the desired property so as to en=
sure that we can detect loop with just one octet in the
 flow label.


Note that the real 2 octe=
ts Rank does not lose the rounding info since the DIP always passes 2 octet=
s.


 <=
/p>

Cheers,=



 <=
/p>

Pascal


 <=
/p>

From: Xavier V=
ilajosana Guillen [mailto:xvilajosana@eecs.berkeley.edu]


Sent: mardi 10 septembre 2013 19:53

To: Pascal Thubert (pthubert)

Cc: Thomas Watteyne; 6TSCH

Subject: Re: [6tsch] Zero Objective Function discussion


 






Hi all,



after some study I agree that we can use the RFC6552 in the minimal 6TiSCH =
configuration. I would like to call for approval or more input from others =
before I consolidate the text in the draft.



I put here an example following Pascal suggestion:



Given 



Rf =3D 1

Sp =3D 2* ETX

Sr =3D 0

minHopRankIncrease =3D 256 (default in RPL)






ETX=3D(xmit/ack)






 




r(n) =3D r(p) + rank_increase

rank_increase=3D (Rf*Sp + Sr) * minHopRankIncrease 




rank_increase=3D(512*=
xmit/ack)





if we take 5 hops (95 are supported) network and r(0)=3D0 and xmit=3D100 an=
d ack=3D75 for all nodes



r(1)=3Dr(0)+rank_increase =3D 0+683 with f=3D0

r(2)=3Dr(1)+683=3D1366 with f=3D1

r(3)=3Dr(2)+683=3D2049 with f=3D2

r(4)=3Dr(3)+683=3D2732 with f=3D2

r(5)=3Dr(4)+683=3D3415 with f=3D3

...

etc...



so f is monotonically increasing and the rank function enables more than en=
ough hops.






Please provide feedba=
ck.






cheers!

Xavi






 
--_000_E045AECD98228444A58C61C200AE1BD8414615AExmbrcdx01ciscoc_-- From P.Zand@utwente.nl Wed Sep 11 07:18:46 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6301C11E826F for <6tsch@ietfa.amsl.com>; Wed, 11 Sep 2013 07:18:46 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 2.097 X-Spam-Level: ** X-Spam-Status: No, score=2.097 tagged_above=-999 required=5 tests=[BAYES_50=0.001, HELO_EQ_NL=0.55, HOST_EQ_NL=1.545, HTML_MESSAGE=0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rZoY-yETaRAS for <6tsch@ietfa.amsl.com>; Wed, 11 Sep 2013 07:18:38 -0700 (PDT) Received: from EXEDGE02.ad.utwente.nl (exedge02.ad.utwente.nl [130.89.5.49]) by ietfa.amsl.com (Postfix) with ESMTP id 0A28221F9EDB for <6tsch@ietf.org>; Wed, 11 Sep 2013 07:18:35 -0700 (PDT) Received: from EXHUB01.ad.utwente.nl (130.89.4.228) by EXEDGE02.ad.utwente.nl (130.89.5.49) with Microsoft SMTP Server (TLS) id 14.2.328.9; Wed, 11 Sep 2013 16:18:37 +0200 Received: from EXMBX23.ad.utwente.nl ([169.254.3.13]) by EXHUB01.ad.utwente.nl ([130.89.4.228]) with mapi id 14.02.0328.009; Wed, 11 Sep 2013 16:18:34 +0200 From: To: , Thread-Topic: [6tsch] report flow contents Thread-Index: AQHOqmeRdn+u8+L3JUGYWl1pnrYuVpm3azMAgAA2pACAAAP1gIABFasAgAAfWwCAAGmlgIABKJyAgAYvvkA= Date: Wed, 11 Sep 2013 14:18:33 +0000 Message-ID: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [130.89.12.149] Content-Type: multipart/mixed; boundary="_015_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88CEXMBX23adutwent_" MIME-Version: 1.0 Cc: pthubert@cisco.com, 6tsch@ietf.org Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2013 14:18:46 -0000 --_015_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88CEXMBX23adutwent_ Content-Type: multipart/related; boundary="_014_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88CEXMBX23adutwent_"; type="multipart/alternative" --_014_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88CEXMBX23adutwent_ Content-Type: multipart/alternative; boundary="_000_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88CEXMBX23adutwent_" --_000_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88CEXMBX23adutwent_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dear All, In the following, I listed the performance metrics reported to the Network/= System Manager in WirelessHART and ISA100.11a. Some reports still need be added, for example the path failure alerts in IS= A100.11a. Pouria WirelessHART performance metrics In WirelessHART[1] network the statistics and events are reported to the Ne= twork Manager (act like PCE in 6TiSCH) through the following commands: 1. Report "Device Health" This report is sent periodically toward the Network Manager. The report sum= maries the communication statistics of a device. Byte Format Description 0-1 Unsigned-16 Number of packets generated by this device since last report 2-3 Unsigned-16 Number of packets terminated by this device since last report 4 Unsigned-8 Number of Data-Link Layer MAC MIC failures detected 5 Unsigned-8 Number of Network Layer (Session) MIC failures detected 6 Enum-8 Power Status 7 Unsigned-8 Number of CRC Errors detected 1. Report "Neighbor Health List" This report is sent periodically toward the Network Manager. The report inc= ludes the statistics of linked neighbors. Byte Format Description 0 Unsigned-8 Neighbor table index 1 Unsigned-8 Number of Neighbor entries read 2 Unsigned-8 Total number of neighbors 3-4 Unsigned-16 Nickname of neighbor 5 Bit-8 Neighbor Flags 6 Signed-8 Mean RSL (Receive Signal Level in dBm) since last report 7-8 Unsigned-16 Number of Packets transmitted to this neighbor 9-10 Unsigned-16 Number of Packets received from this neighbor 11-12 Unsigned-16 Packets received from this neighbor 13-... Number of entries based on response byte 1 1. Report "Neighbor Signal Levels" This report is sent periodically toward the Network Manager. The report inc= ludes the statistics of discovered (but not linked) neighbors. These neighb= ors might be discovered when a device has heard the neighbor communication = in the discovery links. A device that wish to join a network, send a join r= equest to the Network manager, including this report. Byte Format Description 0 Unsigned-8 Neighbor table index 1 Unsigned-8 Number of Neighbor entries read 2 Unsigned-8 Total number of neighbors 3-4 Unsigned-16 Nickname of neighbor 5 Signed-8 RSL of neighbor in dB 6-8 Repeats (as needed) based on response byte 1 1. Alarm "Path Down" The alarm is sent upon detecting a path failure. Byte Format Description 0-1 Unsigned-16 Nickname of neighbor to which path failure was detected 1. Alarm "Source Route Failed" This alarm is sent upon detecting a source route failure. Byte Format Description 0-1 Unsigned-16 Nickname of unreachable neighbor in the source route 2-5 Unsigned-32 Network-Layer MIC (i.e., the MIC generated using the session key) from the = NPDU that failed routing 1. Alarm "Graph Route Failed" This alarm is sent upon detecting a graph route failure. Byte Format Description 0-1 Unsigned-16 Graph Id of the failed route ISA100.11a performance metric In ISA100.11a[2], the L2 performance metrics are reported to the System Man= ager (act like PCE in 6TiSCH) and can be classified into (1) DL_Connectivit= y alert and (2) NeighborDiscovery alert. 1. DL_Connectivity alert The DL_connectivity alert can be classified into (a) Per-neighbor reports a= nd (b) Per-channel reports. * Per-neighbor report Per-neighbor reports are the performance metrics about the neighbors conne= ction and are reported to the System Manager. These statistics are accumula= ted in the "dlmo.NeighborDiag" attribute, for each neighbor. This report is= similar to "Neighbor Health List" report in WirelessHART. Each node in ISA100.11a might be asked to report the following statistics a= bout its neighbor: Octets Format Description 1 Signed-8 RSSI (level) 1 Unsigned-8 RSQI (level) 1-2 ExtDLUint RxDPDU(count): Number of valid Packets received from this neighbor 1-2 ExtDLUint TxSuccessful (count):Count of successful unicast transmissions to the neigh= bor 1-2 ExtDLUint TxFailed (count): Number of unicast transmission, without getting any ACK = or NACK 1-2 ExtDLUint TxCCA_Backoff (count): Number of unicast transmission aborted due to CCA 1-2 ExtDLUint TxNACK (count): Number of NACKs received 2 Signed-16 ClockSigma (level): A rough estimate of standard deviation of clock correct= ions * Per-channel report In addition, in ISA100.11a, several performance metrics are reported based = on channel for all neighbors to the System Manager. These statistics are ac= cumulated in the "dlmo.ChannelDiag" attribute. This report is similar to "D= evice Health" report in WirelessHART. Byte Format Description 0-2 Unsigned-16 Count (Number of attempted unicast transmissions for all channels) 3 Integer-8 [cid:image021.png@01CEAF0A.8DEEBC10] (Percentage of time transmissions on c= hannel 0 did not receive an ACK) 4 Integer-8 [cid:image022.png@01CEAF0A.8DEEBC10] (Percentage of time transmissions on c= hannel 0 aborted due to CCA) ... 33 Integer-8 [cid:image023.png@01CEAF0A.8DEEBC10] (Percentage of time transmissions on c= hannel 15 did not receive an ACK) 34 Integer-8 [cid:image024.png@01CEAF0A.8DEEBC10] (Percentage of time transmissions on c= hannel 15 aborted due to CCA) 1. NeighborDiscovery alert In ISA100.11a, each node sends a report, including a list of candidate (ove= rheard) neighbors, to the System Manager to make a potential new routing de= cisions. The "dlmo.Candidates" attributed is used to store those informatio= n in each node in the L2. This report is similar to the "Neighbor Signal Le= vels" report in WirelessHART. Octets Format Description 1 Unsigned-8 N (count of discovered neighbors) 0-2 ExtDlUint [cid:image025.png@01CEAF0A.8DEEBC10] address 0-1 Signed-8 [cid:image026.png@01CEAF0A.8DEEBC10] 0-1 Unsigned-8 [cid:image027.png@01CEAF0A.8DEEBC10] ... 0-2 ExtDlUint [cid:image028.png@01CEAF0A.8DEEBC10] address 0-1 Signed-8 [cid:image029.png@01CEAF0A.8DEEBC10] 0-1 Unsigned-8 [cid:image030.png@01CEAF0A.8DEEBC10] References 1. IEC 62591: Industrial Communication Networks - Wireless Communicat= ion Network and Communication Profiles - WirelessHART. 2. IEC 62734: Industrial communication networks - Fieldbus specificat= ions - Wireless systems for industrial automation: process control and rela= ted applications - ISA100.11a. From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of T= homas Watteyne Sent: Saturday, September 07, 2013 7:43 PM To: Xavi Vilajosana Cc: Pascal Thubert (pthubert); 6tsch@ietf.org Subject: Re: [6tsch] report flow contents Xavi, Great, thanks! Thomas On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen > wrote: Hi, I created the scratchpad section in the wiki to keep ideas https://bitbucket.org/6tsch/meetings/wiki/Home and added the flow content information here. https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents have a nice weekend! X On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen > wrote: Hi Pascal, it is a good idea! I will collect that information and as Thomas put it at the wiki so we do n= ot lose it. :-) X On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) > wrote: Hello Xavi: At the call I mentioned we could use info on tracks and cells as well, prob= ably on demand from the PCE. For instance, the PCE could observe energy levels over some cells for a wh= ile to make sure they are clean. What do you think? Pascal From: 6tsch-bounces@ietf.org [mailto:6tsch-b= ounces@ietf.org] On Behalf Of Xavier Vilajos= ana Guillen Sent: vendredi 6 septembre 2013 01:17 To: Thomas Watteyne Cc: 6tsch@ietf.org Subject: Re: [6tsch] report flow contents agreed! So the fields become: For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -AVG LQI in a running window [optional] -Latest LQI [optional] -Num TX packets (option in case there is communication with that neighbor) -Num ACK packets (option in case there is communication with that neighbor= ) -Num RX packets (option in case there is communication with that neighbor) -Last ASN when it heart about that neighbor -Bundle: Num links in the Schedule to that neighbor -PDR per link [Optional -- or maybe best and worst PDR only] -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -For each Queue: - Avg Queue length in a running window - Max Queue length in a running window (peak) - Current Queue length (?) - ASN of the oldest packet in the QUEUE? -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -Time source parent -ID -Avg clock drift (correction done) in a running window -Latest clock correction -Parent changes (counter of how many times I changed my time source par= ent) -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -Option Flag (weather there are optional TLV fields in other categories) +(TLV objects)* as regards to this: "Finally, do you envision a generic mechanism whereby the PCE can turn fiel= ds on/off, or triggered independently?" I see it as CoAP Options, where a set of bytes can be used as "clever bitma= p" to tell what options are there, the parsing will decode option by option= and will read the fields. In that way any combination of fields is support= ed. would that work? X On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne > wrote: Xavi, Fantastic! I believe PDR for each link might be too long to fit in a packet. While the= mote will most likely keep that information, we could move that to the que= ry flow, i.e. it is available to the PCE on-demand. Would you agree that the number of links in a bundle belongs to the neighbo= r? Of maybe we want a "bundle" category? In queuing, it might be interesting to see the age of the different packets= , to be able to monitor latency. About LQI, there is no general consensus among vendors on what the definiti= on is, or how exactly it is calculated. I would make it optional. Also, it might be good to be able to add arbitrary fields to each category:= neighbor, queue, time source neighbor. Finally, do you envision a generic mechanism whereby the PCE can turn field= s on/off, or triggered independently? Thomas On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen > wrote: Hi Thomas, Diego, I agree that LQI should be there as well. I update here the list with Thoma= s suggestions. For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -AVG LQI in a running window -Latest LQI -Num TX packets (option in case there is communication with that neighbor) -Num ACK packets (option in case there is communication with that neighbor= ) -Num RX packets (option in case there is communication with that neighbor) -Last ASN when it heart about that neighbor Other fields -Num links in the Schedule to that neighbor -For each link PDR -For each Queue: - Avg Queue length in a running window - Max Queue length in a running window (peak) - Current Queue length (?) -Time source parent -ID -Avg clock drift (correction done) in a running window -Latest clock correction -Parent changes (counter of how many times I changed my time source par= ent) -Option Flag (weather there are optional TLV fields) +(TLV objects)* Hope this makes sense. cheers! Xavi On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne > wrote: [renamed thread] Xavi, A few thoughts: - the counters (numTx, etc) will only be present for neighbors the node has= communicate with, so they should be optional in the packet. - you have focused on the topological information (which I think is the rig= ht one). It might be useful to gather other data related to synchronization= or queuing. - I couldn't agree more with your suggestion to make it extensible. This do= es mean that we will need to state somewhere that a device need to ignore s= ilently fields it does not understand. Thomas On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen > wrote: Hello, I guess that flows are getting defined and I started to think on the= contents of the messages on that flows. Not sure if this is the right time= or I am going way far.. According to the previous discussion I assume that the five flows are: ME-6TOP - Query Flow ME-6TOP - Action Flow 6TOP - ME - Report Flow 6TOP - ME - Event Flow 6TOP - ME - Request BW Flow I'd like to start defining the content of the messages in the Report Flow: The Report Flow: has to deal with the information that a node knows and has= to be sent to the ME so the ME can compute the schedule among others. Here= I list the information that we can know in a mote and can be used at the = ME to compute the schedule (complete please if I miss something) For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -Num TX packets -Num ACK packets -Num RX packets -Last ASN when it heart about that neighbor Other fields -Num links in the Schedule to that neighbor -For each link PDR Then we need to have some TLV like objects that can be used for ad-hoc/naiv= e/other extensions of the reporting process. In that way we don't constrain= t the implementation of the scheduling alg. to that information. what do you think? X On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang > wrote: Hi all, In this thread, we will continue the discussion about Confirmation message.= Here is some background information. Context: e.g. - node sends a report and want to know if the report is accepted., - ME sends a action request and want to know if/when the action taken. Options: (1) Nothing (2) Rely on transport mechanism (e.g. confirmable CoAP message) (3) App-level ACK type (4) Use different flow (i.e. action flow) IMHO, different control flow may have different requirement for confirmatio= n message. (1) Action Flow, needs a App-level confirmation, like Succ/Fail (2) Query Flow, automatically has the confirmation, i.e. the message pa= cket corresponding to a specific query. (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer opt= ion (1) and (3), i.e. the confirmation message is an option, but if a confi= rmation message is needed, it should be App-level Ack, instead of transport= layer confirmation, which will give 6top more flexibility. What do you think? Thanks Qin _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88CEXMBX23adutwent_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Dear All,

In the following, I liste= d the performance metrics reported to the Network/System Manager in Wireles= sHART and ISA100.11a.

Some reports still need b= e added, for example the path failure alerts in ISA100.11a.

Pouria<= /p>

 <= /p>

WirelessHART performance metrics<= o:p>

In WirelessHART[1] network the statistics and eve= nts are reported to the Network Manager (act like PCE in 6TiSCH) through the following commands:

  1. Report “Device Health”

This report is sent periodically toward the N= etwork Manager. The report summaries the communication statistics of a devi= ce.

Byte

Format

Description

0-1

Unsigned-16

Number of packets generated by this dev= ice since last report

2-3

Unsigned-16

Number of packets terminated by this de= vice since last report

4

Unsigned-8

Number of Data-Link Layer MAC MIC failu= res detected

5

Unsigned-8

Number of Network Layer (Session) MIC f= ailures detected

6

Enum-8

Power Status

7

Unsigned-8

Number of CRC Errors detected

 

  1. Report “Neighbor Health List”

This report is sent periodically toward the N= etwork Manager. The report includes the statistics of linked neighbors.

Byte

Format

Description

0

Unsigned-8<= /p>

Neighbor table index

1

Unsigned-8<= /p>

Number of Neighbor entries re= ad

2

Unsigned-8<= /p>

Total number of neighbors

3-4

Unsigned-16=

Nickname of neighbor

5

Bit-8

Neighbor Flags

6

Signed-8

Mean RSL (Receive Signal Leve= l in dBm) since last report

7-8

Unsigned-16=

Number of Packets transmitted= to this neighbor

9-10

Unsigned-16=

Number of Packets received fr= om this neighbor

11-12

Unsigned-16=

Packets received from this ne= ighbor

13-…<= /p>

 

Number of entries based on re= sponse byte 1

 

  1. Report “Neighbor Signal Levels”

This report is sent periodically toward the N= etwork Manager. The report includes the statistics of discovered (but not l= inked) neighbors. These neighbors might be discovered when a device has heard the neighbor communication in the discovery links.= A device that wish to join a network, send a join request to the Network m= anager, including this report.

Byte

Format

Description

0

Unsigned-8<= /p>

Neighbor table index

1

Unsigned-8<= /p>

Number of Neighbor entries re= ad

2

Unsigned-8<= /p>

Total number of neighbors

3-4

Unsigned-16=

Nickname of neighbor

5

Signed-8

RSL of neighbor in dB

6-8

 

Repeats (as needed) based on = response byte 1

 

  1. Alarm “Path Down”

The alarm is sent upon detecting a path failu= re.

Byte

Format

Description=

0-1

Unsigned-16=

Nickname of neighbor to which= path failure was detected

 

  1. Alarm "Source Route Failed"

This alarm is sent upon detecting= a source route failure.

Byte

Format

Description

0-1

Unsigned-16=

Nickname of unreachable neigh= bor in the source route

2-5

Unsigned-32<= /o:p>

Network-Layer MIC (i.e., the MIC genera= ted using the session key) from the NPDU that failed routing

 

  1. Alarm "Graph Route Failed"

This alarm is sent upon detecting a graph rou= te failure.

Byte

Format

Description=

0-1

Unsigned-16=

Graph Id of the failed route<= o:p>

 

 

ISA100.11a performance metric

In ISA100.11a[2], the L2 performance metrics are = reported to the System Manager (act like PCE in 6TiSCH) and can be classified into (1) DL_Connectivity alert and (2) NeighborDiscovery= alert.

  1. DL_Connectivity alert
    2. <= /ol>

    The DL_connectivity alert can be classified i= nto (a) Per-neighbor reports and (b) Per-channel reports.

      • Per-neighbor report<= /li>

    Per-neighbor reports are the  performanc= e metrics about the neighbors connection and are reported to the System Man= ager. These statistics are accumulated in the “dlmo.NeighborDiag̶= 1; attribute, for each neighbor. This report is similar to “Neighbor He= alth List” report in WirelessHART.

    Each node in ISA100.11a might be asked to rep= ort the following statistics about its neighbor:

     

    Octets

    Format

    Description=

    1

    Signed-8

    RSSI (level)

    1

    Unsigned-8<= /p>

    RSQI (level)

    1-2

    ExtDLUint

    RxDPDU(count): Number of vali= d Packets received from this neighbor

    1-2

    ExtDLUint

    TxSuccessful (count):Count of= successful unicast transmissions to the neighbor

    1-2

    ExtDLUint

    TxFailed (count): Number of u= nicast transmission, without  getting any ACK or NACK

    1-2

    ExtDLUint

    TxCCA_Backoff (count): Number= of unicast transmission aborted due to CCA

    1-2

    ExtDLUint

    TxNACK (count): Number of NAC= Ks received

    2

    Signed-16

    ClockSigma (level): A rough e= stimate of standard deviation of clock corrections

     

      • Per-channel report

    In addition, in ISA100.11a, several performan= ce metrics are reported based on channel for all neighbors to the System Ma= nager. These statistics are accumulated in the “dlmo.ChannelDiag̶= 1; attribute. This report is similar to “Device Health” report in= WirelessHART.

    Byte

    Format

    Description=

    0-2

    Unsigned-16=

    Count (Number of attempted un= icast transmissions for all channels)

    3

    Integer-8

    (Percentage of time transmissions on channel 0 did not receive an ACK)

    4

    Integer-8

    (Percentage of time transmissions on channel 0 aborted due to CCA)

    …

     

     

    33

    Integer-8

    (Percentage of time transmissions on channel 15 did not receive an ACK)

    34

    Integer-8

    (Percentage of time transmissions on channel 15 aborted due to CCA)

     

    1. NeighborDiscovery alert

    In ISA100.11a, each node sends a report, incl= uding a list of candidate (overheard) neighbors, to the System Manager to m= ake a potential new routing decisions. The “dlmo.Candidates” attributed is used to store those information in each node in the L2. This= report is similar to the “Neighbor Signal Levels” report in Wi= relessHART.

    Octets

    Format

    Description=

    1

    Unsigned-8<= /p>

    N (count of discovered neighb= ors)

    0-2

    ExtDlUint

    address

    0-1

    Signed-8

    0-1

    Unsigned-8<= /p>

    <= span style=3D"font-size:11.0pt;font-family:"Calibri","sans-s= erif"">

    …

     

     

    0-2

    ExtDlUint

    address

    0-1

    Signed-8

    0-1

    Unsigned-8<= /p>

    <= span style=3D"font-size:11.0pt;font-family:"Calibri","sans-s= erif"">

     

     

    <= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif"">References

    1. &nbs= p;     IEC 62591: Industrial Communication Networks - Wireless Communic= ation Network and Communication Profiles - WirelessHART.<= /p>

     

    2. &nbs= p;     IEC 62734: Industrial communication networks - Fieldbus specific= ations - Wireless systems for industrial automation: process control and related applications - ISA100.11a.

     <= /p>

     <= /p>

     <= /p>

    From: 6tsch-bo= unces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Thomas Watteyne
    Sent: Saturday, September 07, 2013 7:43 PM
    To: Xavi Vilajosana
    Cc: Pascal Thubert (pthubert); 6tsch@ietf.org
    Subject: Re: [6tsch] report flow contents

     

    Xavi,

    Great, thanks!

    Thomas

     

    On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Gu= illen <xvilajosana@eecs.berkeley.edu> wrote:

    Hi,
    I created the scratchpad section in the wiki to keep ideas
    https://bitbucket.org/6tsch/meetings/wiki/Home


    and added the flow content information here.

    https://bitbucket.org/6tsch/meetings/wiki/report_flow_con= tents

    have a nice weekend!

    X

     

    On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:

    Hi Pascal, it is a go= od idea!

    I will collect that information and as Thomas put it= at the wiki so we do not lose it.

    :-)

    X

     

    On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthu= bert) <pthubert@= cisco.com> wrote:

    Hello Xavi:

     

    At the call I mentioned we could use in= fo on tracks and cells as well, probably on demand from the PCE.

    For instance, the PCE could observe ene= rgy levels over some cells for  a while to make sure they are clean.

     

    What do you think?

    Pascal

     

    From: 6tsch-bounces@i= etf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
    Sent: vendredi 6 septembre 2013 01:17
    To: Thomas Watteyne
    Cc: 6tsch@ietf.o= rg
    Subject: Re: [6tsch] report flow contents

     

    agreed!

    So the fields become:

     

     

    For each known neighbor:

     -ID

     -AVG RSSI in a running window

     -Latest RSSI

     -AVG LQI in a running window [optional]

     -Latest LQI [optional]

     -Num TX packets (option in case there is communica= tion with that neighbor)

     -Num ACK packets (option in case there is communic= ation with that neighbor)

     -Num RX packets (option in case there is communica= tion with that neighbor)

     -Last ASN when it heart about that neighbor <= /span>

     -Bundle: Num links in the Schedule to that neighbo= r

          -PDR per link [Optional -- or maybe= best and worst PDR only]

     

     -Option Flag (weather there are opti= onal TLV fields on that category)

       +(TLV objects)* 

     

     -For each Queue:

        - Avg Queue length in a running window

        - Max Queue length in a running window (pe= ak)

        - Current Queue length (?)

        - ASN of the oldest packet in the QUEUE?

        -Option Flag (weather there are optional T= LV fields on that category)

            +(TLV objects)* 

     

    -Time source parent

        -ID

        -Avg clock drift (correction done) in a ru= nning window

        -Latest clock correction=

        -Parent changes (counter of how many times= I changed my time source parent)

        -Option Flag (weather there are optional T= LV fields on that category)

        +(TLV objects)* 

     

    -Option Flag (weather there are optional TLV fields in o= ther categories)

       +(TLV objects)* =

     

    as regards to this:

     

    "Finally, do you envision a generic mechanism where= by the PCE can turn fields on/off, or triggered independently?"=

     

    I see it as CoAP Options, where a set of bytes can be used as "clev= er bitmap" to tell what options are there, the parsing will decode option by option and will read the fields. In that way any combination of = fields is supported.

     

    would that work?

    X

     

    On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <watteyne@eecs.berkeley.ed= u> wrote:

    Xavi,

     

    Fantastic!

     

    I believe PDR for each link might be too long to fit in a packet. = While the mote will most likely keep that information, we could move that t= o the query flow, i.e. it is available to the PCE on-demand.

     

    Would you agree that the number of links in a bundle belongs to th= e neighbor? Of maybe we want a "bundle" category?

     

    In queuing, it might be interesting to see the age of the differen= t packets, to be able to monitor latency.

     

    About LQI, there is no general consensus among vendors on what the= definition is, or how exactly it is calculated. I would make it optional.<= o:p>

     

    Also, it might be good to be able to add arbitrary fields to each = category: neighbor, queue, time source neighbor.

     

    Finally, do you envision a generic mechanism whereby the PCE can t= urn fields on/off, or triggered independently?

     

    Thomas

     

    On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen <xvilajosana= @eecs.berkeley.edu> wrote:

    Hi Thomas, Diego,

     

    I agree that LQI should be there as well. I update here the list w= ith Thomas suggestions. 

     

    For each known neighbor:

     -ID

     -AVG RSSI in a running window

     -Latest RSSI

     -AVG LQI in a running window

     -Latest LQI

     -Num TX packets (option in case there is communica= tion with that neighbor)

     -Num ACK packets (option in case there is communic= ation with that neighbor)

     -Num RX packets (option in case there is communica= tion with that neighbor)

     -Last ASN when it heart about that neighbor <= /span>

     

    Other fields

     -Num links in the Schedule to that neighbor=

        -For each link PDR

     -For each Queue:

        - Avg Queue length in a running window

        - Max Queue length in a running window (peak)

        - Current Queue length (?)

    -Time source parent

        -ID

        -Avg clock drift (correction done) in a running wind= ow

        -Latest clock correction

        -Parent changes (counter of how many times I changed= my time source parent)

     

    -Option Flag (weather there are optional TLV fields)

       +(TLV objects)* 

     

     

    Hope this makes sense.

    cheers!
    Xavi

     

    On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <watteyne@eecs.berkeley.e= du> wrote:

    [renamed thread]

     

    Xavi,

     

    A few thoughts:

    - the counters (numTx, etc) will only be present for ne= ighbors the node has communicate with, so they should be optional in the packet.

    - you have focused on the topological information (whic= h I think is the right one). It might be useful to gather other data related to synchronization or queuing.

    - I couldn't agree more with your suggestion to make it= extensible. This does mean that we will need to state somewhere that a device need to ignore silently fields it does not understand.

     

    Thomas

     

    On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen <xvilajosana= @eecs.berkeley.edu> wrote:

    Hello, I guess that flows are getting defined and I started to thi= nk on the contents of the messages on that flows. Not sure if this is the r= ight time or I am going way far..

     

    According to the previous discussion I assume that the five flows = are:

     

    ME-6TOP - Query Flow

    ME-6TOP - Action Flow

     

    6TOP - ME - Report Flow

    6TOP - ME - Event Flow

    6TOP - ME - Request BW Flow

     

    I'd like to start defining the content of the messages in the Repo= rt Flow:

     

    The Report Flow: has to deal with the information that a node know= s and has to be sent to the ME so the ME can compute the schedule among oth= ers. Here I list  the information that we can know in a mote and can be used at the ME to compute the schedule (c= omplete please if I miss something)

     

    For each known neighbor:

     -ID

     -AVG RSSI in a running window

     -Latest RSSI

     -Num TX packets

     -Num ACK packets

     -Num RX packets

     -Last ASN when it heart about that neighbor =

     

    Other fields

     -Num links in the Schedule to that neighbor

        -For each link PDR

     

     

    Then we need to have some TLV like objects that can be used for ad= -hoc/naive/other extensions of the reporting process. In that way we don't = constraint the implementation of the scheduling alg. to that information.

     

    what do you think?

    X

     

    On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:<= o:p>

    Hi all,

     

    In this thread, we will continue = the discussion about Confirmation message. Here is some background informat= ion.

     

    Context: e.g.

        - node sends a repo= rt and want to know if the report is accepted., 

        - ME sends a action= request and want to know if/when the action taken.

    Options:

       (1) Nothing

       (2) Rely on transpor= t mechanism (e.g. confirmable CoAP message)

       (3) App-level ACK ty= pe

       (4) Use different fl= ow (i.e. action flow)

     

    IMHO, different control flow may = have different requirement for confirmation message.

        (1) Action Flow, ne= eds a App-level confirmation, like Succ/Fail

        (2) Query Flow, aut= omatically has the confirmation, i.e. the message packet corresponding to a= specific query.

        (3) Report Flow and= Event Flow, option (1)-(3) are OK, but I prefer option (1) and (3), i.e. t= he confirmation message is an option, but if a confirmation message is needed, it should be App-level Ack, instead of transport layer = confirmation, which will give 6top more flexibility.

     

    What do you think?

     

    Thanks

    Qin

        =

     

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    h= ttps://www.ietf.org/mailman/listinfo/6tsch

     


    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch

     


    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch

     

     


    _______________________________________________
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    6tsch@ietf.org
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cy9jb3JlLnhtbFBLBQYAAAAAEAAQABwEAACQXAAAAAA= --_015_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88CEXMBX23adutwent_-- From qinwang@berkeley.edu Wed Sep 11 08:07:08 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4086121E8118 for <6tsch@ietfa.amsl.com>; Wed, 11 Sep 2013 08:07:08 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.074 X-Spam-Level: X-Spam-Status: No, score=-2.074 tagged_above=-999 required=5 tests=[AWL=0.302, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_41=0.6, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id MnaesQMuJIpx for <6tsch@ietfa.amsl.com>; Wed, 11 Sep 2013 08:07:04 -0700 (PDT) Received: from mail-ie0-f181.google.com (mail-ie0-f181.google.com [209.85.223.181]) by ietfa.amsl.com (Postfix) with ESMTP id 12F6F11E8181 for <6tsch@ietf.org>; Wed, 11 Sep 2013 08:07:03 -0700 (PDT) Received: by mail-ie0-f181.google.com with SMTP id y16so13362838ieg.26 for <6tsch@ietf.org>; Wed, 11 Sep 2013 08:07:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=YfmKqxDZjwztaTnnc/FAQVKJUOuS8xIjnmA5uCRPSo0=; b=XvUT4ZVvSAlYFn8ZvEQugJxId7mj5dxDy0oZeVq2XFd+CN6WCJRFyBc6XRaz9qxTrp yR63pa8jCCdyx+mfL+lFsnEPTmBRG6czzguNN/mungvtNuJFGZBQa0KuSCg1jwLLk7F4 /Z08bhZweUKObTYU9nmpN+dxoKf5sA/jKLMAo4+H2c9sE7YCEjeZW0DyYuXNjtrvYwzw Lp11p/dsxFsY+hLdQkiHUsKCZrkb/wMVCXsrYTRwye1mOB+oJxTNKIPZEnwE8yniui6U O2T3zJb5DKi4YTpj2xniJDYgw7CFWc6tars62i/lKsJTh3vdBzB5x7noC9nPCKEKz6ES JceQ== X-Gm-Message-State: ALoCoQnm1YhqSntpWtHdN0Xak9yNXxbSULF8Gtkz+T7VgAbXIq3Nza+MjiO8H80iFvkWkazegNgn MIME-Version: 1.0 X-Received: by 10.50.73.41 with SMTP id i9mr496623igv.30.1378912022379; Wed, 11 Sep 2013 08:07:02 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Wed, 11 Sep 2013 08:07:02 -0700 (PDT) In-Reply-To: References: Date: Wed, 11 Sep 2013 23:07:02 +0800 Message-ID: From: Qin Wang To: Thomas Watteyne Content-Type: multipart/alternative; boundary=089e013a027045583904e61cf9d4 Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] Is generic management method possible? X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2013 15:07:08 -0000 --089e013a027045583904e61cf9d4 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Thomas, Thank you very much for the detailed explanation. It is very clear. I agree with you to leave the discussion about distributed case later. Thanks Qin On Wed, Sep 11, 2013 at 1:17 AM, Thomas Watteyne wrote: > Qin, > > I think we all largely agree. What follows is some context to make > entirely sure we're talking about the same thing. It's written in -vvmode= , so please be patient. > > The following illustrates the different interactions. > > +-----+ +--------------------+ +--------------------+ > | PCE |<=3D=3D*(3)*=3D=3D>| 6top ME ^ | | = | > +-----+ +---------------|----+ +--------------------+ > | CoAP | | | CoAP | > +-------------- | ---+ +--------------------+ > | . *(1)* | | . | > | . | | | . | > +-------------- | ---+ +--------------------+ > | 6top V |<=3D=3D*(2)*=3D=3D>| 6top = | > +--------------------+ +--------------------+ > | IEEE802.15.4e TSCH | | IEEE802.15.4e TSCH | > +--------------------+ +--------------------+ > > 6top is a sublayer which lives above MAC. It is described in > http://tools.ietf.org/html/draft-wang-6tsch-6top-00 and defines *(1)* the > hooks for an upper layer to interact with the TSCH schedule and *(2)* a > negotiation mechanism between two nodes to manage soft cells allocation. = * > (1)* is used by the 6top management entity (6top ME). *(2)* is used by > neighbor nodes to manage soft cells. > > In a centralized case, the PCE talks to the 6top ME over some > application-level protocol *(3)*. While this is still in debate, CoAP > looks like an interesting choice (Raghu and Xavi will be leading a > discussion about CoAP during this Friday's call). > > About the different interactions depicted above: > > - The discussion about the flows we had last week deals with *(3)*. We > identified 5 flows, and started discussing the contents of the report > flows, as captured in > https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents. > - The interaction marked *(1)* is inside the mote. Since it does not > involve sending bytes over the air, I would argue that it is > implementation-specific, and out of scope of what we want to standardi= ze. > And while > http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.4 define= s > a set of commands, an implementation will be compliant as long as it > trigger the correct "over-the-air" behavior. > - Since we are working on the centralized case first, and that it > makes most sense to use hard cells in the centralized case, *(2)* hasn= 't > received much attention lately. I believe that we should keep what's > defined in http://tools.ietf.org/html/draft-wang-6tsch-6top-00 and > resume working on it when we tackle the distributed case. > > Coming back to our discussion about formats, I expect a packet of > interaction to look *(3)* something like: > > +------...-------+------+---------+ > | several header | CoAP | *payload* | > +------...-------+------+---------+ > > CoAP will give us "services" such as resource and URIs, method > (GET/POST/PUT/DELETE) and optional confirmable messages. Using those simp= ly > means that the 6top ME will not have to re-define those "services", hence > that the format of the *payload* gets simpler. CoAP is also > "application-agnostic", i.e. it just transports the *payload* between two > end-points, without knowing anything about what that *payload* contains. > > The distributed case is a different problem. We are talking about using > protocols such as RSVP/NSIS, which are more than just "transporting" data= , > since they come with precise interaction models. Given this, I would argu= e > that we will not be able to reuse the exact same *payload* format. That > being said, it we opt for flexible encoding of generic information such a= s > "a request for bandwidth", or "a statistic about cell usage", we might be > able to reuse those as building blocks whenever needed by RSVP/NSIS (or a > simpler version thereof). I believe in the JSON/BSON/CBOR path we are > following, and that it will give us the re-usability we are looking for. > > Is this in line with what you're thinking? > > Thomas > > On Tue, Sep 10, 2013 at 5:48 AM, Qin Wang wrote: > >> Hi Thomas and Maria Rita, >> >> I totally agree with you that we should focus on centralized approach in >> the current step. But I cannot see it is very difficult to cover >> distributed case. Maybe I miss something. >> >> To be clear, in my mind, the exchanged messages in distributed case is >> that between 6top and some Reservation protocol like RSVP/NSIS in upper >> layer. In another word, it is about exchanging messages inside a node, >> instead of exchanging messages among neighbors. I don't understand why f= or >> different upper layer Reservation protocol, the control flows from/to 6t= op >> could be different significantly. Can you explain a little more? >> >> Thanks >> Qin >> >> >> >> >> >> >> On Tue, Sep 10, 2013 at 2:45 PM, Maria Rita PALATTELLA < >> maria-rita.palattella@uni.lu> wrote: >> >>> Qin, I agree too about defining the formats in a way that we can reuse >>> them for the distributed case. But, for the time being, I would be focu= sed >>> on the centralized approach and try to find a solution for it. And then= , >>> move to the distributed one (that for sure will raise other issues up).= * >>> *** >>> >>> Let=92s try to solve the problems one by one! **** >>> >>> Maria Rita **** >>> >>> ** ** >>> >>> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >>> Behalf Of *Thomas Watteyne >>> *Sent:* Tuesday, September 10, 2013 6:24 AM >>> *To:* 6tsch@ietf.org >>> *Subject:* Re: [6tsch] Is generic management method possible?**** >>> >>> ** ** >>> >>> Qin,**** >>> >>> ** ** >>> >>> I fully agree that being able to reuse some formats in the distributed >>> case is important. The question about the exact protocol to use for >>> negotiation between neighbors in the distributed case is a very broad o= ne. >>> It is too early to discuss that. We can, however, keep the distributed = case >>> in mind when proposing formats.**** >>> >>> ** ** >>> >>> Thomas**** >>> >>> ** ** >>> >>> On Mon, Sep 9, 2013 at 1:57 PM, Qin Wang wrote:*= * >>> ** >>> >>> Hi All,**** >>> >>> ** ** >>> >>> In the previous discussion, we have figured out 5 control flows between >>> PCE and node, which were expressed in the context of centralized case. >>> Obviously, it will be great if the messages in those identified control >>> flows are generic, suitable for both centralized and distributed case. >>> During last Friday's call, it was mentioned but is still a open issue. = I >>> propose to continue the discussion in this thread.**** >>> >>> ** ** >>> >>> Comparing the role of PCE in centralized case,I think RSVP/NSIS will >>> play similar role in distributed case. In another word, instead of >>> exchanging message with PCE via a network, 6top Management Entity will >>> exchange message with a Reservation Entity like RSVP/NSIS inside the sa= me >>> node. The question is if it is possible to use same design in the two >>> cases. (I'm not expert on RSVP and NSIS, please input your opinions).*= * >>> ** >>> >>> ** ** >>> >>> Firstly, I think the contents of messages in the centralized and >>> distributed case are overlap in a big portion. For example, both of the= m >>> need to send action flow, both of them need statistics data, and so on.= * >>> *** >>> >>> ** ** >>> >>> Secondly, in terms of Message Exchange, the two cases are similar. The >>> only difference is, in centralized case, the control messages are carri= ed >>> by CoAP as payload; and in distributed case, the control messages are >>> "sent" via internal pointer. **** >>> >>> ** ** >>> >>> Make sense?**** >>> >>> ** ** >>> >>> Qin**** >>> >>> ** ** >>> >>> ** ** >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch**** >>> >>> ** ** >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >> > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --089e013a027045583904e61cf9d4 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hi Thomas,

Thank you very much for the = detailed explanation. It is very clear. I agree with you to leave the discu= ssion about distributed case later.

Thanks
Qin
 --089e013a027045583904e61cf9d4-- From twatteyne@gmail.com Wed Sep 11 10:00:20 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CB14121E8102 for <6tsch@ietfa.amsl.com>; Wed, 11 Sep 2013 10:00:12 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.167 X-Spam-Level: X-Spam-Status: No, score=-0.167 tagged_above=-999 required=5 tests=[AWL=-0.790, BAYES_50=0.001, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QPr2xKns+Nbj for <6tsch@ietfa.amsl.com>; Wed, 11 Sep 2013 10:00:05 -0700 (PDT) Received: from mail-pd0-x235.google.com (mail-pd0-x235.google.com [IPv6:2607:f8b0:400e:c02::235]) by ietfa.amsl.com (Postfix) with ESMTP id 5BFAE11E80D3 for <6tsch@ietf.org>; Wed, 11 Sep 2013 09:59:18 -0700 (PDT) Received: by mail-pd0-f181.google.com with SMTP id g10so9500674pdj.12 for <6tsch@ietf.org>; Wed, 11 Sep 2013 09:59:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=fOxJs9YYAnDHAPo6qlcJGbSNjMaTHCHbe4/SQydFp3o=; b=kckLJZYs5rSmOuOzBIsFT8qgybvf2HAlTIZceotZKb0OE2PEACFrk9UlhaRiabx83A qxDgedKYFfIojTVN6307j4IA8YUJ0uJW3KG0Iffd6ZymfJwievrADY/lC4ov5qWxwdj1 Z9dlLGm2ip+E/VmvbgKBTBbCAjVtBTVCGnW6c9q31dhRxY1UKukOdbSTJx+jvH6uIiO5 3O14oZejWyEBMCnY89FYLtNFSHWFK/h5e8xTDHpF/xjWgcLJZyAqo61z58OxP1VgSxOm R5pkcg6pvHrRWdoNBx4u+P1gk/0Lwb5ZA34R+tF7w0khWmMRp+CjwHpNHxsLpJuwHU5/ wZLw== X-Received: by 10.68.178.132 with SMTP id cy4mr2904515pbc.85.1378918757173; Wed, 11 Sep 2013 09:59:17 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Wed, 11 Sep 2013 09:58:56 -0700 (PDT) In-Reply-To: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> From: Thomas Watteyne Date: Wed, 11 Sep 2013 09:58:56 -0700 X-Google-Sender-Auth: KgdKtuiHwTtT_UxTyq3saEPK7b8 Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/related; boundary=047d7b86f558b2126104e61e8a2d Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2013 17:00:24 -0000 --047d7b86f558b2126104e61e8a2d Content-Type: multipart/alternative; boundary=047d7b86f558b2125d04e61e8a2c --047d7b86f558b2125d04e61e8a2c Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Pouria, Wonderful list. Your document clearly highlights that (1) the "report" flows both in WirelessHART and ISA100.11a are strictly periodic and (1) they have a fixed format. From what we have discussed so far, the solutions we are developing is different in the following ways: - 6TiSCH offers a mechanism allowing the PCE to configure what data it want to receive, and configure the trigger for a node to generate from d= ata. - 6TiSCH offers a mechanism allowing the PCE to query the data, on top of having the nodes push the information - In 6TiSCH, the format of the payload is not fixed. In particular, it is possible to add application-specific fields, allowing for extensions. - In 6TiSCH, the transport (CoAP?) and formatting (CBOR?) are IETF-friendly and integrate well in the IPv6 stack and associated mechan= isms Did I get that right? A couple of questions: - the WirelessHART "alarms" correspond to a 6TiSCH "events". Yet, I suppose that a "source route failed" and "graph route failed" are out of scope of 6TiSCH, but rather part of RPL. I would expect those to the ICM= Pv6 messages. Thoughts? - About the per-channel report, I assume this is "per frequency", right? Is a channel report generated for each neighbor? - When comparing your list to *Xavi*'s https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents: - we might want to add a "numNACK" counter to the neighbor informatio= n - we might want to keep timing statistics for all neighbors, not just time source parents. That is, when I receive a packet from a neighbor which is not my time source neighbor, I do not change my clock, but I still know the timing error. Thomas On Wed, Sep 11, 2013 at 7:18 AM, wrote: > Dear All,**** > > In the following, I listed the performance metrics reported to the > Network/System Manager in WirelessHART and ISA100.11a.**** > > Some reports still need be added, for example the path failure alerts in > ISA100.11a.**** > > Pouria**** > > ** ** > > *WirelessHART performance metrics* > > In WirelessHART[1] network the statistics and events are reported to the > Network Manager (act like PCE in 6TiSCH) through the following commands:*= * > ** > > 1. Report =93Device Health=94 **** > > This report is sent periodically toward the Network Manager. The report > summaries the communication statistics of a device.**** > > Byte**** > > Format**** > > Description**** > > 0-1**** > > Unsigned-16**** > > Number of packets generated by this device since last report**** > > 2-3**** > > Unsigned-16**** > > Number of packets terminated by this device since last report**** > > 4**** > > Unsigned-8**** > > Number of Data-Link Layer MAC MIC failures detected**** > > 5**** > > Unsigned-8**** > > Number of Network Layer (Session) MIC failures detected**** > > 6**** > > Enum-8**** > > Power Status**** > > 7**** > > Unsigned-8**** > > Number of CRC Errors detected**** > > ** ** > > 1. Report =93Neighbor Health List=94 **** > > This report is sent periodically toward the Network Manager. The report > includes the statistics of linked neighbors.**** > > Byte**** > > Format**** > > Description**** > > 0**** > > Unsigned-8**** > > Neighbor table index**** > > 1**** > > Unsigned-8**** > > Number of Neighbor entries read**** > > 2**** > > Unsigned-8**** > > Total number of neighbors**** > > 3-4**** > > Unsigned-16**** > > Nickname of neighbor**** > > 5**** > > Bit-8**** > > Neighbor Flags**** > > 6**** > > Signed-8**** > > Mean RSL (Receive Signal Level in dBm) since last report**** > > 7-8**** > > Unsigned-16**** > > Number of Packets transmitted to this neighbor**** > > 9-10**** > > Unsigned-16**** > > Number of Packets received from this neighbor**** > > 11-12**** > > Unsigned-16**** > > Packets received from this neighbor**** > > 13-=85**** > > ** ** > > Number of entries based on response byte 1**** > > ** ** > > 1. Report =93Neighbor Signal Levels=94**** > > This report is sent periodically toward the Network Manager. The report > includes the statistics of discovered (but not linked) neighbors. These > neighbors might be discovered when a device has heard the neighbor > communication in the discovery links. A device that wish to join a networ= k, > send a join request to the Network manager, including this report.**** > > Byte**** > > Format**** > > Description**** > > 0**** > > Unsigned-8**** > > Neighbor table index**** > > 1**** > > Unsigned-8**** > > Number of Neighbor entries read**** > > 2**** > > Unsigned-8**** > > Total number of neighbors**** > > 3-4**** > > Unsigned-16**** > > Nickname of neighbor**** > > 5**** > > Signed-8**** > > RSL of neighbor in dB**** > > 6-8**** > > ** ** > > Repeats (as needed) based on response byte 1**** > > ** ** > > 1. Alarm =93Path Down=94 **** > > The alarm is sent upon detecting a path failure. **** > > Byte**** > > Format**** > > Description**** > > 0-1**** > > Unsigned-16**** > > Nickname of neighbor to which path failure was detected**** > > ** ** > > 1. Alarm "Source Route Failed"**** > > This alarm is sent upon detecting a source route failure.**** > > Byte**** > > Format**** > > Description**** > > 0-1**** > > Unsigned-16**** > > Nickname of unreachable neighbor in the source route**** > > 2-5**** > > Unsigned-32**** > > Network-Layer MIC (i.e., the MIC generated using the session key) from th= e > NPDU that failed routing**** > > ** ** > > 1. Alarm "Graph Route Failed"**** > > This alarm is sent upon detecting a graph route failure.**** > > Byte**** > > Format**** > > Description**** > > 0-1**** > > Unsigned-16**** > > Graph Id of the failed route**** > > ** ** > > ** ** > > *ISA100.11a performance metric* > > In ISA100.11a[2], the L2 performance metrics are reported to the System > Manager (act like PCE in 6TiSCH) and can be classified into (1) > DL_Connectivity alert and (2) NeighborDiscovery alert.**** > > 1. DL_Connectivity alert**** > > The DL_connectivity alert can be classified into (a) Per-neighbor > reports and (b) Per-channel reports. **** > > - *Per-neighbor report* > > Per-neighbor reports are the performance metrics about the neighbors > connection and are reported to the System Manager. These statistics are > accumulated in the =93dlmo.NeighborDiag=94 attribute, for each neighbor. = This > report is similar to =93Neighbor Health List=94 report in WirelessHART. *= *** > > Each node in ISA100.11a might be asked to report the following statistics > about its neighbor:**** > > ** ** > > Octets**** > > Format**** > > Description**** > > 1**** > > Signed-8**** > > RSSI (level)**** > > 1**** > > Unsigned-8**** > > RSQI (level)**** > > 1-2**** > > ExtDLUint**** > > RxDPDU(count): Number of valid Packets received from this neighbor **** > > 1-2**** > > ExtDLUint**** > > TxSuccessful (count):Count of successful unicast transmissions to the > neighbor **** > > 1-2**** > > ExtDLUint**** > > TxFailed (count): Number of unicast transmission, without getting any AC= K > or NACK**** > > 1-2**** > > ExtDLUint**** > > TxCCA_Backoff (count): Number of unicast transmission aborted due to CCA*= * > ** > > 1-2**** > > ExtDLUint**** > > TxNACK (count): Number of NACKs received**** > > 2**** > > Signed-16**** > > ClockSigma (level): A rough estimate of standard deviation of clock > corrections**** > > ** ** > > - *Per-channel report* > > In addition, in ISA100.11a, several performance metrics are reported > based on channel for all neighbors to the System Manager. These statistic= s > are accumulated in the =93dlmo.ChannelDiag=94 attribute. This report is s= imilar > to =93Device Health=94 report in WirelessHART.**** > > Byte**** > > Format**** > > Description**** > > 0-2**** > > Unsigned-16**** > > Count (Number of attempted unicast transmissions for all channels)**** > > 3**** > > Integer-8**** > > **** (Percentage of time transmissions on channel 0 did not receive an > ACK)**** > > 4**** > > Integer-8**** > > **** (Percentage of time transmissions on channel 0 aborted due to CCA)**= * > * > > =85**** > > ** ** > > ** ** > > 33**** > > Integer-8**** > > **** (Percentage of time transmissions on channel 15 did not receive an > ACK)**** > > 34**** > > Integer-8**** > > **** (Percentage of time transmissions on channel 15 aborted due to CCA)*= * > ** > > ** ** > > 1. NeighborDiscovery alert**** > > In ISA100.11a, each node sends a report, including a list of candidate > (overheard) neighbors, to the System Manager to make a potential new > routing decisions. The =93dlmo.Candidates=94 attributed is used to store = those > information in each node in the L2. This report is similar to the =93Neig= hbor > Signal Levels=94 report in WirelessHART.**** > > Octets**** > > Format**** > > Description**** > > 1**** > > Unsigned-8**** > > N (count of discovered neighbors)**** > > 0-2**** > > ExtDlUint**** > > **** address**** > > 0-1**** > > Signed-8**** > > **** **** > > 0-1**** > > Unsigned-8**** > > ******** > > =85**** > > ** ** > > ** ** > > 0-2**** > > ExtDlUint**** > > **** address**** > > 0-1**** > > Signed-8**** > > **** **** > > 0-1**** > > Unsigned-8**** > > ******** > > ** ** > > * * > > *References* > > **1. **IEC 62591: Industrial Communication Networks - Wireless > Communication Network and Communication Profiles - WirelessHART.**** > > ** ** > > **2. **IEC 62734: Industrial communication networks - Fieldbus > specifications - Wireless systems for industrial automation: process > control and related applications - ISA100.11a.**** > > ** ** > > ** ** > > ** ** > > *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On Behalf > Of *Thomas Watteyne > *Sent:* Saturday, September 07, 2013 7:43 PM > *To:* Xavi Vilajosana > *Cc:* Pascal Thubert (pthubert); 6tsch@ietf.org > *Subject:* Re: [6tsch] report flow contents**** > > ** ** > > Xavi,**** > > Great, thanks!**** > > Thomas**** > > ** ** > > On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote:**** > > Hi, > I created the scratchpad section in the wiki to keep ideas > https://bitbucket.org/6tsch/meetings/wiki/Home > > > and added the flow content information here. > > https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents**** > > have a nice weekend!**** > > X**** > > ** ** > > On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote:**** > > Hi Pascal, it is a good idea!**** > > I will collect that information and as Thomas put it at the wiki so we do > not lose it. > > :-)**** > > X**** > > ** ** > > On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) < > pthubert@cisco.com> wrote:**** > > Hello Xavi:**** > > **** > > At the call I mentioned we could use info on tracks and cells as well, > probably on demand from the PCE.**** > > For instance, the PCE could observe energy levels over some cells for a > while to make sure they are clean.**** > > **** > > What do you think?**** > > Pascal**** > > **** > > *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On Behalf > Of *Xavier Vilajosana Guillen > *Sent:* vendredi 6 septembre 2013 01:17 > *To:* Thomas Watteyne > *Cc:* 6tsch@ietf.org > *Subject:* Re: [6tsch] report flow contents**** > > **** > > agreed!**** > > So the fields become:**** > > **** > > **** > > For each known neighbor:**** > > -ID**** > > -AVG RSSI in a running window**** > > -Latest RSSI**** > > -AVG LQI in a running window [optional]**** > > -Latest LQI [optional]**** > > -Num TX packets (option in case there is communication with that neighbo= r) > **** > > -Num ACK packets (option in case there is communication with that > neighbor)**** > > -Num RX packets (option in case there is communication with that neighbo= r) > **** > > -Last ASN when it heart about that neighbor **** > > -Bundle: Num links in the Schedule to that neighbor**** > > -PDR per link [Optional -- or maybe best and worst PDR only]**** > > **** > > -Option Flag (weather there are optional TLV fields on that category)***= * > > +(TLV objects)* **** > > **** > > -For each Queue:**** > > - Avg Queue length in a running window**** > > - Max Queue length in a running window (peak)**** > > - Current Queue length (?)**** > > - ASN of the oldest packet in the QUEUE?**** > > -Option Flag (weather there are optional TLV fields on that category)= * > *** > > +(TLV objects)* **** > > **** > > -Time source parent**** > > -ID**** > > -Avg clock drift (correction done) in a running window**** > > -Latest clock correction**** > > -Parent changes (counter of how many times I changed my time source > parent)**** > > -Option Flag (weather there are optional TLV fields on that category)= * > *** > > +(TLV objects)* **** > > **** > > -Option Flag (weather there are optional TLV fields in other categories)*= * > ** > > +(TLV objects)* **** > > **** > > as regards to this:**** > > **** > > "Finally, do you envision a generic mechanism whereby the PCE can turn > fields on/off, or triggered independently?"**** > > **** > > I see it as CoAP Options, where a set of bytes can be used as "clever > bitmap" to tell what options are there, the parsing will decode option by > option and will read the fields. In that way any combination of fields is > supported.**** > > **** > > would that work?**** > > X**** > > **** > > On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > Xavi,**** > > **** > > Fantastic!**** > > **** > > I believe PDR for each link might be too long to fit in a packet. While > the mote will most likely keep that information, we could move that to th= e > query flow, i.e. it is available to the PCE on-demand.**** > > **** > > Would you agree that the number of links in a bundle belongs to the > neighbor? Of maybe we want a "bundle" category?**** > > **** > > In queuing, it might be interesting to see the age of the different > packets, to be able to monitor latency.**** > > **** > > About LQI, there is no general consensus among vendors on what the > definition is, or how exactly it is calculated. I would make it optional.= * > *** > > **** > > Also, it might be good to be able to add arbitrary fields to each > category: neighbor, queue, time source neighbor.**** > > **** > > Finally, do you envision a generic mechanism whereby the PCE can turn > fields on/off, or triggered independently?**** > > **** > > Thomas**** > > **** > > On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote:**** > > Hi Thomas, Diego,**** > > **** > > I agree that LQI should be there as well. I update here the list with > Thomas suggestions. **** > > **** > > For each known neighbor:**** > > -ID**** > > -AVG RSSI in a running window**** > > -Latest RSSI**** > > -AVG LQI in a running window**** > > -Latest LQI**** > > -Num TX packets (option in case there is communication with that neighbo= r) > **** > > -Num ACK packets (option in case there is communication with that > neighbor)**** > > -Num RX packets (option in case there is communication with that neighbo= r) > **** > > -Last ASN when it heart about that neighbor **** > > **** > > Other fields**** > > -Num links in the Schedule to that neighbor**** > > -For each link PDR**** > > -For each Queue:**** > > - Avg Queue length in a running window**** > > - Max Queue length in a running window (peak)**** > > - Current Queue length (?)**** > > -Time source parent**** > > -ID**** > > -Avg clock drift (correction done) in a running window**** > > -Latest clock correction**** > > -Parent changes (counter of how many times I changed my time source > parent)**** > > **** > > -Option Flag (weather there are optional TLV fields)**** > > +(TLV objects)* **** > > **** > > **** > > Hope this makes sense.**** > > cheers! > Xavi**** > > **** > > On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > *[renamed thread]***** > > **** > > Xavi,**** > > **** > > A few thoughts:**** > > - the counters (numTx, etc) will only be present for neighbors the node > has communicate with, so they should be optional in the packet.**** > > - you have focused on the topological information (which I think is the > right one). It might be useful to gather other data related to > synchronization or queuing.**** > > - I couldn't agree more with your suggestion to make it extensible. This > does mean that we will need to state somewhere that a device need to igno= re > silently fields it does not understand.**** > > **** > > Thomas**** > > **** > > On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote:**** > > Hello, I guess that flows are getting defined and I started to think on > the contents of the messages on that flows. Not sure if this is the right > time or I am going way far..**** > > **** > > According to the previous discussion I assume that the five flows are:***= * > > **** > > ME-6TOP - Query Flow**** > > ME-6TOP - Action Flow**** > > **** > > 6TOP - ME - Report Flow**** > > 6TOP - ME - Event Flow**** > > 6TOP - ME - Request BW Flow**** > > **** > > I'd like to start defining the content of the messages in the Report Flow= : > **** > > **** > > The Report Flow: has to deal with the information that a node knows and > has to be sent to the ME so the ME can compute the schedule among others. > Here I list the information that we can know in a mote and can be used a= t > the ME to compute the schedule (complete please if I miss something)**** > > **** > > For each known neighbor:**** > > -ID**** > > -AVG RSSI in a running window**** > > -Latest RSSI**** > > -Num TX packets**** > > -Num ACK packets**** > > -Num RX packets**** > > -Last ASN when it heart about that neighbor **** > > **** > > Other fields**** > > -Num links in the Schedule to that neighbor**** > > -For each link PDR**** > > **** > > **** > > Then we need to have some TLV like objects that can be used for > ad-hoc/naive/other extensions of the reporting process. In that way we > don't constraint the implementation of the scheduling alg. to that > information.**** > > **** > > what do you think?**** > > X**** > > **** > > On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote:*= * > ** > > Hi all,**** > > **** > > In this thread, we will continue the discussion about Confirmation > message. Here is some background information.**** > > **** > > Context: e.g.**** > > - node sends a report and want to know if the report is accepted., **= * > * > > - ME sends a action request and want to know if/when the action taken= . > **** > > Options:**** > > (1) Nothing**** > > (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** > > (3) App-level ACK type**** > > (4) Use different flow (i.e. action flow)**** > > **** > > IMHO, different control flow may have different requirement for > confirmation message.**** > > (1) Action Flow, needs a App-level confirmation, like Succ/Fail**** > > (2) Query Flow, automatically has the confirmation, i.e. the message > packet corresponding to a specific query.**** > > (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer > option (1) and (3), i.e. the confirmation message is an option, but if a > confirmation message is needed, it should be App-level Ack, instead of > transport layer confirmation, which will give 6top more flexibility.**** > > **** > > What do you think?**** > > **** > > Thanks**** > > Qin**** > > **** > > **** > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > **** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > **** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > **** > > **** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > **** > > ** ** > > ** ** > > ** ** > --047d7b86f558b2125d04e61e8a2c Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Pouria,

Wonderful list.

<= /div>
Your document clearly highlights that (1) the "report" = flows both in WirelessHART and ISA100.11a are strictly periodic and (1) the= y have a fixed format. From what we have discussed so far, the solutions we= are developing is different in the following ways:
  • 6TiSCH offers a mechanism allowing the PCE to configure w= hat data it want to receive, and configure the trigger for a node to genera= te from data.
  • 6TiSCH offers=A0a mechanism allowing the PCE to query= the data, on top of having the nodes push the information
  • In 6TiSCH, the format of the payload is not fixed. In particular, it is= possible to add application-specific fields, allowing for extensions.
    • =
  • In 6TiSCH,=A0the transport (CoAP?) and formatting (CBOR?) are IETF-frie= ndly and integrate well in the IPv6 stack and associated mechanisms
Did I get that right?

A coup= le of questions:
  • the WirelessHART "alarms"= correspond to a 6TiSCH "events". Yet, I suppose that a "sou= rce route failed" and "graph route failed" are out of scope = of 6TiSCH, but rather part of RPL. I would expect those to the ICMPv6 messa= ges. Thoughts?
  • About the per-channel report, I assume this is "per frequency"= ;, right? Is a channel report generated for each neighbor?
  • When com= paring your list to Xavi's=A0https://bitbucket.org/6tsch/meeting= s/wiki/report_flow_contents:
    • we might want to add a "numNACK" counter to the neighbor = information
    • we might want to keep timing statistics for all neighbo= rs, not just time source parents. That is, when I receive a packet from a n= eighbor which is not my time source neighbor, I do not change my clock, but= I still know the timing error.
Thomas

On Wed, Sep 11, 2013 at 7:18 AM, &= lt;P.Zand@utwente.nl= > wrote:

Dear All,

In the following, I listed the performance metrics re= ported to the Network/System Manager in WirelessHART and ISA100.11a.=

Some reports still need be added, for example the pat= h failure alerts in ISA100.11a.

Pouria

=A0

WirelessHART performance metrics

In Wireless= HART[1] network the statistics and events are reported to the Network Manag= er (act like PCE in 6TiSCH) through the following commands:

  1. Report =93Device Health=94

This report is sent periodically toward the Network Manager. The report= summaries the communication statistics of a device.

Byte

Format

 Description

0-1

Unsigned-16

Number of packets generated by this device since last report=

2-3

Unsigned-16

Number of packets terminated by this device since last report

4

Unsigned-8

Number of Data-Link Layer MAC MIC failures detected

5

Unsigned-8

Number of Network Layer (Session) MIC failures detected

6

Enum-8

Power Status

7

Unsigned-8

Number of CRC Errors detected

=A0<= u>

  1. Report =93Neighbor Health List=94

This report is sent periodically toward the Network Manager. The report= includes the statistics of linked neighbors.

Byte

Format

 Description

0

Unsigned-8=

Neighbor t= able index

1

Unsigned-8=

Number of = Neighbor entries read

2

Unsigned-8=

Total numb= er of neighbors

3-4=

Unsigned-1= 6

Nickname o= f neighbor

5

Bit-8

Neighbor F= lags

6

Signed-8

Mean RSL (= Receive Signal Level in dBm) since last report

7-8=

Unsigned-1= 6

Number of = Packets transmitted to this neighbor

9-10

Unsigned-1= 6

Number of = Packets received from this neighbor

11-12

Unsigned-1= 6

Packets re= ceived from this neighbor

13-=85<= /u>

=A0=

Number of = entries based on response byte 1

=A0

  1. Report =93Neighbor Signal Levels=94

This report is sent periodically toward the Network Manager. The report= includes the statistics of discovered (but not linked) neighbors. These ne= ighbors might be discovered when a device has heard the neighbor communication in the discovery links.= A device that wish to join a network, send a join request to the Network m= anager, including this report.

Byte

Format

 Description

0

Unsigned-8=

Neighbor t= able index

1

Unsigned-8=

Number of = Neighbor entries read

2

Unsigned-8=

Total numb= er of neighbors

3-4=

Unsigned-1= 6

Nickname o= f neighbor

5

Signed-8

RSL of nei= ghbor in dB

6-8=

=A0=

Repeats (a= s needed) based on response byte 1

=A0

  1. Alarm =93Path Down=94

The alarm is sent upon detecting a path failure.

Byte

Format<= /u>

 Descriptio= n

0-1=

Unsigned-1= 6

Nickname o= f neighbor to which path failure was detected

=A0

  1. Alarm "Source Route Failed"

This alarm is sent upon detecting a source route failure.=

Byte

Format

 Descriptio= n

0-1=

Unsigned-1= 6

Nickname o= f unreachable neighbor in the source route

2-5=

Unsigned-3= 2

Network-Layer MIC (i.e., the MIC generated using the session key) from the= NPDU that failed routing

=A0

  1. Alarm "Graph Route Failed"

This alarm is sent upon detecting a graph route failure.<= /span>

Byte

Format<= /u>

 Descriptio= n

0-1=

Unsigned-1= 6

Graph Id o= f the failed route

=A0

=A0<= u>

ISA100.11a performance metric

In ISA100.1= 1a[2], the L2 performance metrics are reported to the System Manager (act l= ike PCE in 6TiSCH) and can be classified into (1) DL_Connectivity alert and (2) NeighborDiscovery= alert.

  1. DL_Connectivity alert

The DL_connectivity alert can be classified into (a) Per-neighbor repor= ts and (b) Per-channel reports.

    • Per-neighbor report

Per-neighbor reports are the=A0 performance metrics about the neighbors= connection and are reported to the System Manager. These statistics are ac= cumulated in the =93dlmo.NeighborDiag=94 attribute, for each neighbor. This report is similar to =93Neighbor Health= List=94 report in WirelessHART.

Each node in ISA100.11a might be asked to report the following statisti= cs about its neighbor:

=A0

Octets<= /u>

Format<= /u>

Descriptio= n

1

Signed-8

RSSI (leve= l)

1

Unsigned-8=

RSQI (leve= l)

1-2=

ExtDLUint<= u>

RxDPDU(cou= nt): Number of valid Packets received from this neighbor

1-2=

ExtDLUint<= u>

TxSuccessf= ul (count):Count of successful unicast transmissions to the neighbor

1-2=

ExtDLUint<= u>

TxFailed (= count): Number of unicast transmission, without=A0 getting any ACK or NACK<= u>

1-2=

ExtDLUint<= u>

TxCCA_Back= off (count): Number of unicast transmission aborted due to CCA

1-2=

ExtDLUint<= u>

TxNACK (co= unt): Number of NACKs received

2

Signed-16<= u>

ClockSigma= (level): A rough estimate of standard deviation of clock corrections

=A0

    • Per-channel report

In addition, in ISA100.11a, several performance metrics are reported ba= sed on channel for all neighbors to the System Manager. These statistics ar= e accumulated in the =93dlmo.ChannelDiag=94 attribute. This report is similar to =93Device Health=94 report in Wireles= sHART.

Byte

Format<= /u>

Descriptio= n

0-2=

Unsigned-1= 6

Count (Num= ber of attempted unicast transmissions for all channels)

3

Integer-8<= u>

(Percentage of time transmissions on channel 0 did not receive an ACK)<= /u>

4

Integer-8<= u>

(Percentage of time transmissions on channel 0 aborted due to CCA)<= u>

=85=

=A0=

=A0=

33<= u>

Integer-8<= u>

(Percentage of time transmissions on channel 15 did not receive an ACK)=

34<= u>

Integer-8<= u>

(Percentage of time transmissions on channel 15 aborted due to CCA)=

=A0

  1. NeighborDiscovery alert

In ISA100.11a, each node sends a report, including a list of candidate = (overheard) neighbors, to the System Manager to make a potential new routin= g decisions. The =93dlmo.Candidates=94 attributed is used to store those information in each node in the L2. This= report is similar to the =93Neighbor Signal Levels=94 report in WirelessHA= RT.

Octets<= /u>

Format<= /u>

Descriptio= n

1

Unsigned-8=

N (count o= f discovered neighbors)

0-2=

ExtDlUint<= u>

address

0-1=

Signed-8

0-1=

Unsigned-8=

=85=

=A0=

=A0=

0-2=

ExtDlUint<= u>

address

0-1=

Signed-8

0-1=

Unsigned-8=

=A0<= u>

=A0

Referen= ces

1.=A0=A0=A0=A0=A0=A0 IEC 62591: Industr= ial Communication Networks - Wireless Communication Network and Communicati= on Profiles - WirelessHART.

=A0

2.=A0=A0=A0=A0=A0=A0 IEC 62734: Industr= ial communication networks - Fieldbus specifications - Wireless systems for= industrial automation: process control and related applications - ISA100.11a.

=A0

=A0

=A0

From: 6tsch-bou= nces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Thomas Watteyne
Sent: Saturday, September 07, 2013 7:43 PM
To: Xavi Vilajosana
Cc: Pascal Thubert (pthubert); 6tsch@ietf.org
Subject: Re: [6tsch] report flow contents

=A0

Xavi,

Great, thanks!

Thomas

=A0

On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen <= ;xvilajo= sana@eecs.berkeley.edu> wrote:

Hi,
I created the scratchpad section in the wiki to keep ideas
https://bitbucket.org/6tsch/meetings/wiki/Home


and added the flow content information here.

https://bitbucket.org/6tsch/meetings/wiki/report_flow_con= tents

have a nice weekend!

X<= u>

=A0

On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen &l= t;xvilaj= osana@eecs.berkeley.edu> wrote:

Hi Pascal, it is a good idea!=

I will collect that information and as Thomas put it at the w= iki so we do not lose it.

:-)

X=

=A0

On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) <= ;pthubert@cisco.com= > wrote:

Hello Xavi:

=A0

At the call I mentioned we could use info on tracks a= nd cells as well, probably on demand from the PCE.

For instance, the PCE could observe energy levels ove= r some cells for=A0 a while to make sure they are clean.

=A0

What do you think?

Pascal

=A0

From: 6tsch-bounces@i= etf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
Sent: vendredi 6 septembre 2013 01:17
To: Thomas Watteyne
Cc: 6tsch@ietf.o= rg
Subject: Re: [6tsch] report flow contents

=A0

agreed!

So the fields become:

=A0

=A0

= For each known neighbor:

= =A0-ID

= =A0-AVG RSSI in a running window

= =A0-Latest RSSI

= =A0-AVG LQI in a running window [optional]

= =A0-Latest LQI [optional]

= =A0-Num TX packets (option in case there is communication with that neighbo= r)

= =A0-Num ACK packets (option in case there is communication with that neighb= or)

= =A0-Num RX packets (option in case there is communication with that neighbo= r)

= =A0-Last ASN when it heart about that neighbor=A0

= =A0-Bundle: Num links in the Schedule to that neighbor=

= =A0 =A0 =A0 -PDR per link [Optional -- or maybe best and worst PDR only]

=A0

=A0-Option Flag (weather there are optional TLV fields = on that category)

=A0 =A0+(TLV objects)*=A0

= =A0

= =A0-For each Queue:

= =A0 =A0 - Avg Queue length in a running window

= =A0 =A0 - Max Queue length in a running window (peak)<= /p>

= =A0 =A0 - Current Queue length (?)

= =A0 =A0 - ASN of the oldest packet in the QUEUE?

= =A0 =A0 -Option Flag (weather there are optional TLV fields on that categor= y)

= =A0 =A0 =A0 =A0 +(TLV objects)*=A0

= =A0

= -Time source parent

= =A0 =A0 -ID

= =A0 =A0 -Avg clock drift (correction done) in a running window

= =A0 =A0 -Latest clock correction

= =A0 =A0 -Parent changes (counter of how many times I changed my time source= parent)

= =A0 =A0 -Option Flag (weather there are optional TLV fields on that categor= y)

= =A0 =A0 +(TLV objects)*=A0

= =A0

= -Option Flag (weather there are optional TLV fields in other categories)

= =A0 =A0+(TLV objects)*=A0

=A0

as regards to this:

=A0

= "Finally, do you envision a generic mechanism whereby the PCE can turn= fields on/off, or triggered independently?"

=A0

I see it as CoAP= Options, where a set of bytes can be used as "clever bitmap" to = tell what options are there, the parsing will decode option by option and will read the fields. In that way any combination of = fields is supported.

=A0

would that work?=

X<= u>

=A0

On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <watteyne@eecs.berk= eley.edu> wrote:

Xavi,

=A0

Fantastic!

=A0

I believe PDR for each link might be too long to fit in a pac= ket. While the mote will most likely keep that information, we could move t= hat to the query flow, i.e. it is available to the PCE on-demand.

=A0

Would you agree that the number of links in a bundle belongs = to the neighbor? Of maybe we want a "bundle" category?<= /u>

=A0

In queuing, it might be interesting to see the age of the dif= ferent packets, to be able to monitor latency.

=A0

About LQI, there is no general consensus among vendors on wha= t the definition is, or how exactly it is calculated. I would make it optio= nal.

=A0

Also, it might be good to be able to add arbitrary fields to = each category: neighbor, queue, time source neighbor.

=A0

Finally, do you envision a generic mechanism whereby the PCE = can turn fields on/off, or triggered independently?

=A0

Thomas

=A0

On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen &l= t;xvilaj= osana@eecs.berkeley.edu> wrote:

Hi Thomas, Diego,

=A0

I agree that LQI should be there as well. I update here the l= ist with Thomas suggestions.=A0

=A0

= For each known neighbor:

= =A0-ID

= =A0-AVG RSSI in a running window

= =A0-Latest RSSI

= =A0-AVG LQI in a running window

= =A0-Latest LQI

= =A0-Num TX packets (option in case there is communication with that neighbo= r)

= =A0-Num ACK packets (option in case there is communication with that neighb= or)

= =A0-Num RX packets (option in case there is communication with that neighbo= r)

= =A0-Last ASN when it heart about that neighbor=A0

= =A0

= Other fields

= =A0-Num links in the Schedule to that neighbor

= =A0 =A0 -For each link PDR

=A0-For each Queue:

=A0 =A0 - Avg Queue length in a running window<= /p>

=A0 =A0 - Max Queue length in a running window (peak)<= u>

=A0 =A0 - Current Queue length (?)

-Time source parent

=A0 =A0 -ID

=A0 =A0 -Avg clock drift (correction done) in a running windo= w

=A0 =A0 -Latest clock correction

=A0 =A0 -Parent changes (counter of how many times I changed = my time source parent)

=A0

-Option Flag (weather there are optional TLV fields)

=A0 =A0+(TLV objects)*=A0

=A0

=A0

Hope this makes sense.

cheers!
Xavi

=A0

On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <watteyne@eecs.berk= eley.edu> wrote:

[renamed thread]

= =A0

X= avi,

= =A0

A= few thoughts:

-= the counters (numTx, etc) will only be present for neighbors the node has = communicate with, so they should be optional in the packet.

-= you have focused on the topological information (which I think is the righ= t one). It might be useful to gather other data related to synchronization or queuing.

-= I couldn't agree more with your suggestion to make it extensible. This= does mean that we will need to state somewhere that a device need to ignore silently fields it does not understand.

= =A0

T= homas

=A0

On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen &l= t;xvilaj= osana@eecs.berkeley.edu> wrote:

Hello, I guess that flows are getting defined and I started t= o think on the contents of the messages on that flows. Not sure if this is = the right time or I am going way far..

=A0

According to the previous discussion I assume that the five f= lows are:

=A0

ME-6TOP - Query Flow

ME-6TOP - Action Flow

=A0

6TOP - ME - Report Flow

6TOP - ME - Event Flow

6TOP - ME - Request BW Flow

=A0

I'd like to start defining the content of the messages in= the Report Flow:

=A0

The Report Flow: has to deal with the information that a node= knows and has to be sent to the ME so the ME can compute the schedule amon= g others. Here I list =A0the information that we can know in a mote and can be used at the ME to compute the schedule (c= omplete please if I miss something)

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window

=A0-Latest RSSI

=A0-Num TX packets

=A0-Num ACK packets

=A0-Num RX packets

=A0-Last ASN when it heart about that neighbor=A0

=A0

Other fields

=A0-Num links in the Schedule to that neighbor<= /p>

=A0 =A0 -For each link PDR

=A0

=A0

Then we need to have some TLV like objects that can be used f= or ad-hoc/naive/other extensions of the reporting process. In that way we d= on't constraint the implementation of the scheduling alg. to that information.

=A0

what do you think?

X

=A0

On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wr= ote:

Hi all,

=A0

In this thread, we will cont= inue the discussion about Confirmation message. Here is some background inf= ormation.

=A0

Context: e.g.<= u>

=A0 =A0 - node sends a repor= t and want to know if the report is accepted.,=A0

=A0 =A0 - ME sends a action = request and want to know if/when the action taken.

Options:

=A0 =A0(1) Nothing=

=A0 =A0(2) Rely on transport= mechanism (e.g. confirmable CoAP message)

=A0 =A0(3) App-level ACK typ= e

=A0 =A0(4) Use different flo= w (i.e. action flow)

=A0

IMHO, different control flow= may have different requirement for confirmation message.<= /u>

=A0 =A0 (1) Action Flow, nee= ds a App-level confirmation, like Succ/Fail

=A0 =A0 (2) Query Flow, auto= matically has the confirmation, i.e. the message packet corresponding to a = specific query.

=A0 =A0 (3) Report Flow and = Event Flow, option (1)-(3) are OK, but I prefer option (1) and (3), i.e. th= e confirmation message is an option, but if a confirmation message is needed, it should be App-level Ack, instead of transport layer = confirmation, which will give 6top more flexibility.

=A0

What do you think?=

=A0

Thanks<= /p>

Qin

=A0 = =A0=A0

=A0

________________________________= _______________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0

=A0

=A0

=A0


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boundary=bcaec52bea1949856104e62026d8 --bcaec52bea1949856104e62026d8 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Thomas, my 5 cents. I agree on adding NACK information and timing differences with other than time source parent neighbors. I will add to the wiki :-) As regards to the differences of what we do at 6TiSCH and WHart or ISA100.11a, our proposal is more flexible and has less cohesion with a cost of increased complexity (e.g configurable data and reporting period). We have to analyse carefully what are the implications in terms of protocol complexity and implementation of that mechanism versus how often they would be used. Could we maybe define some "templates" or default configurations so using the 6TiSCH can be done without configuration overhead? Then configuration can be used for those that are really interested on tuning their system. just thoughts.. X On Wed, Sep 11, 2013 at 9:58 AM, Thomas Watteyne wrote: > Pouria, > > Wonderful list. > > Your document clearly highlights that (1) the "report" flows both in > WirelessHART and ISA100.11a are strictly periodic and (1) they have a fix= ed > format. From what we have discussed so far, the solutions we are developi= ng > is different in the following ways: > > - 6TiSCH offers a mechanism allowing the PCE to configure what data it > want to receive, and configure the trigger for a node to generate from= data. > - 6TiSCH offers a mechanism allowing the PCE to query the data, on top > of having the nodes push the information > - In 6TiSCH, the format of the payload is not fixed. In particular, it > is possible to add application-specific fields, allowing for extension= s. > - In 6TiSCH, the transport (CoAP?) and formatting (CBOR?) are > IETF-friendly and integrate well in the IPv6 stack and associated mech= anisms > > Did I get that right? > > A couple of questions: > > - the WirelessHART "alarms" correspond to a 6TiSCH "events". Yet, I > suppose that a "source route failed" and "graph route failed" are out = of > scope of 6TiSCH, but rather part of RPL. I would expect those to the I= CMPv6 > messages. Thoughts? > - About the per-channel report, I assume this is "per frequency", > right? Is a channel report generated for each neighbor? > - When comparing your list to *Xavi*'s > https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents: > - we might want to add a "numNACK" counter to the neighbor > information > - we might want to keep timing statistics for all neighbors, not > just time source parents. That is, when I receive a packet from a n= eighbor > which is not my time source neighbor, I do not change my clock, but= I still > know the timing error. > > Thomas > > On Wed, Sep 11, 2013 at 7:18 AM, wrote: > >> Dear All,**** >> >> In the following, I listed the performance metrics reported to the >> Network/System Manager in WirelessHART and ISA100.11a.**** >> >> Some reports still need be added, for example the path failure alerts in >> ISA100.11a.**** >> >> Pouria**** >> >> ** ** >> >> *WirelessHART performance metrics* >> >> In WirelessHART[1] network the statistics and events are reported to the >> Network Manager (act like PCE in 6TiSCH) through the following commands:= * >> *** >> >> 1. Report =93Device Health=94 **** >> >> This report is sent periodically toward the Network Manager. The report >> summaries the communication statistics of a device.**** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0-1**** >> >> Unsigned-16**** >> >> Number of packets generated by this device since last report**** >> >> 2-3**** >> >> Unsigned-16**** >> >> Number of packets terminated by this device since last report**** >> >> 4**** >> >> Unsigned-8**** >> >> Number of Data-Link Layer MAC MIC failures detected**** >> >> 5**** >> >> Unsigned-8**** >> >> Number of Network Layer (Session) MIC failures detected**** >> >> 6**** >> >> Enum-8**** >> >> Power Status**** >> >> 7**** >> >> Unsigned-8**** >> >> Number of CRC Errors detected**** >> >> ** ** >> >> 1. Report =93Neighbor Health List=94 **** >> >> This report is sent periodically toward the Network Manager. The report >> includes the statistics of linked neighbors.**** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0**** >> >> Unsigned-8**** >> >> Neighbor table index**** >> >> 1**** >> >> Unsigned-8**** >> >> Number of Neighbor entries read**** >> >> 2**** >> >> Unsigned-8**** >> >> Total number of neighbors**** >> >> 3-4**** >> >> Unsigned-16**** >> >> Nickname of neighbor**** >> >> 5**** >> >> Bit-8**** >> >> Neighbor Flags**** >> >> 6**** >> >> Signed-8**** >> >> Mean RSL (Receive Signal Level in dBm) since last report**** >> >> 7-8**** >> >> Unsigned-16**** >> >> Number of Packets transmitted to this neighbor**** >> >> 9-10**** >> >> Unsigned-16**** >> >> Number of Packets received from this neighbor**** >> >> 11-12**** >> >> Unsigned-16**** >> >> Packets received from this neighbor**** >> >> 13-=85**** >> >> ** ** >> >> Number of entries based on response byte 1**** >> >> ** ** >> >> 1. Report =93Neighbor Signal Levels=94**** >> >> This report is sent periodically toward the Network Manager. The report >> includes the statistics of discovered (but not linked) neighbors. These >> neighbors might be discovered when a device has heard the neighbor >> communication in the discovery links. A device that wish to join a netwo= rk, >> send a join request to the Network manager, including this report.**** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0**** >> >> Unsigned-8**** >> >> Neighbor table index**** >> >> 1**** >> >> Unsigned-8**** >> >> Number of Neighbor entries read**** >> >> 2**** >> >> Unsigned-8**** >> >> Total number of neighbors**** >> >> 3-4**** >> >> Unsigned-16**** >> >> Nickname of neighbor**** >> >> 5**** >> >> Signed-8**** >> >> RSL of neighbor in dB**** >> >> 6-8**** >> >> ** ** >> >> Repeats (as needed) based on response byte 1**** >> >> ** ** >> >> 1. Alarm =93Path Down=94 **** >> >> The alarm is sent upon detecting a path failure. **** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0-1**** >> >> Unsigned-16**** >> >> Nickname of neighbor to which path failure was detected**** >> >> ** ** >> >> 1. Alarm "Source Route Failed"**** >> >> This alarm is sent upon detecting a source route failure.**** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0-1**** >> >> Unsigned-16**** >> >> Nickname of unreachable neighbor in the source route**** >> >> 2-5**** >> >> Unsigned-32**** >> >> Network-Layer MIC (i.e., the MIC generated using the session key) from >> the NPDU that failed routing**** >> >> ** ** >> >> 1. Alarm "Graph Route Failed"**** >> >> This alarm is sent upon detecting a graph route failure.**** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0-1**** >> >> Unsigned-16**** >> >> Graph Id of the failed route**** >> >> ** ** >> >> ** ** >> >> *ISA100.11a performance metric* >> >> In ISA100.11a[2], the L2 performance metrics are reported to the System >> Manager (act like PCE in 6TiSCH) and can be classified into (1) >> DL_Connectivity alert and (2) NeighborDiscovery alert.**** >> >> 1. DL_Connectivity alert**** >> >> The DL_connectivity alert can be classified into (a) Per-neighbor >> reports and (b) Per-channel reports. **** >> >> - *Per-neighbor report* >> >> Per-neighbor reports are the performance metrics about the neighbors >> connection and are reported to the System Manager. These statistics are >> accumulated in the =93dlmo.NeighborDiag=94 attribute, for each neighbor.= This >> report is similar to =93Neighbor Health List=94 report in WirelessHART. = **** >> >> Each node in ISA100.11a might be asked to report the following statistic= s >> about its neighbor:**** >> >> ** ** >> >> Octets**** >> >> Format**** >> >> Description**** >> >> 1**** >> >> Signed-8**** >> >> RSSI (level)**** >> >> 1**** >> >> Unsigned-8**** >> >> RSQI (level)**** >> >> 1-2**** >> >> ExtDLUint**** >> >> RxDPDU(count): Number of valid Packets received from this neighbor **** >> >> 1-2**** >> >> ExtDLUint**** >> >> TxSuccessful (count):Count of successful unicast transmissions to the >> neighbor **** >> >> 1-2**** >> >> ExtDLUint**** >> >> TxFailed (count): Number of unicast transmission, without getting any >> ACK or NACK**** >> >> 1-2**** >> >> ExtDLUint**** >> >> TxCCA_Backoff (count): Number of unicast transmission aborted due to CCA= * >> *** >> >> 1-2**** >> >> ExtDLUint**** >> >> TxNACK (count): Number of NACKs received**** >> >> 2**** >> >> Signed-16**** >> >> ClockSigma (level): A rough estimate of standard deviation of clock >> corrections**** >> >> ** ** >> >> - *Per-channel report* >> >> In addition, in ISA100.11a, several performance metrics are reported >> based on channel for all neighbors to the System Manager. These statisti= cs >> are accumulated in the =93dlmo.ChannelDiag=94 attribute. This report is = similar >> to =93Device Health=94 report in WirelessHART.**** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0-2**** >> >> Unsigned-16**** >> >> Count (Number of attempted unicast transmissions for all channels)**** >> >> 3**** >> >> Integer-8**** >> >> **** (Percentage of time transmissions on channel 0 did not receive an >> ACK)**** >> >> 4**** >> >> Integer-8**** >> >> **** (Percentage of time transmissions on channel 0 aborted due to CCA)*= * >> ** >> >> =85**** >> >> ** ** >> >> ** ** >> >> 33**** >> >> Integer-8**** >> >> **** (Percentage of time transmissions on channel 15 did not receive an >> ACK)**** >> >> 34**** >> >> Integer-8**** >> >> **** (Percentage of time transmissions on channel 15 aborted due to CCA)= * >> *** >> >> ** ** >> >> 1. NeighborDiscovery alert**** >> >> In ISA100.11a, each node sends a report, including a list of candidate >> (overheard) neighbors, to the System Manager to make a potential new >> routing decisions. The =93dlmo.Candidates=94 attributed is used to store= those >> information in each node in the L2. This report is similar to the =93Nei= ghbor >> Signal Levels=94 report in WirelessHART.**** >> >> Octets**** >> >> Format**** >> >> Description**** >> >> 1**** >> >> Unsigned-8**** >> >> N (count of discovered neighbors)**** >> >> 0-2**** >> >> ExtDlUint**** >> >> **** address**** >> >> 0-1**** >> >> Signed-8**** >> >> **** **** >> >> 0-1**** >> >> Unsigned-8**** >> >> ******** >> >> =85**** >> >> ** ** >> >> ** ** >> >> 0-2**** >> >> ExtDlUint**** >> >> **** address**** >> >> 0-1**** >> >> Signed-8**** >> >> **** **** >> >> 0-1**** >> >> Unsigned-8**** >> >> ******** >> >> ** ** >> >> * * >> >> *References* >> >> **1. **IEC 62591: Industrial Communication Networks - Wireless >> Communication Network and Communication Profiles - WirelessHART.**** >> >> ** ** >> >> **2. **IEC 62734: Industrial communication networks - Fieldbus >> specifications - Wireless systems for industrial automation: process >> control and related applications - ISA100.11a.**** >> >> ** ** >> >> ** ** >> >> ** ** >> >> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >> Behalf Of *Thomas Watteyne >> *Sent:* Saturday, September 07, 2013 7:43 PM >> *To:* Xavi Vilajosana >> *Cc:* Pascal Thubert (pthubert); 6tsch@ietf.org >> *Subject:* Re: [6tsch] report flow contents**** >> >> ** ** >> >> Xavi,**** >> >> Great, thanks!**** >> >> Thomas**** >> >> ** ** >> >> On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote:**** >> >> Hi, >> I created the scratchpad section in the wiki to keep ideas >> https://bitbucket.org/6tsch/meetings/wiki/Home >> >> >> and added the flow content information here. >> >> https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents**** >> >> have a nice weekend!**** >> >> X**** >> >> ** ** >> >> On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote:**** >> >> Hi Pascal, it is a good idea!**** >> >> I will collect that information and as Thomas put it at the wiki so we d= o >> not lose it. >> >> :-)**** >> >> X**** >> >> ** ** >> >> On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) < >> pthubert@cisco.com> wrote:**** >> >> Hello Xavi:**** >> >> **** >> >> At the call I mentioned we could use info on tracks and cells as well, >> probably on demand from the PCE.**** >> >> For instance, the PCE could observe energy levels over some cells for a >> while to make sure they are clean.**** >> >> **** >> >> What do you think?**** >> >> Pascal**** >> >> **** >> >> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >> Behalf Of *Xavier Vilajosana Guillen >> *Sent:* vendredi 6 septembre 2013 01:17 >> *To:* Thomas Watteyne >> *Cc:* 6tsch@ietf.org >> *Subject:* Re: [6tsch] report flow contents**** >> >> **** >> >> agreed!**** >> >> So the fields become:**** >> >> **** >> >> **** >> >> For each known neighbor:**** >> >> -ID**** >> >> -AVG RSSI in a running window**** >> >> -Latest RSSI**** >> >> -AVG LQI in a running window [optional]**** >> >> -Latest LQI [optional]**** >> >> -Num TX packets (option in case there is communication with that >> neighbor)**** >> >> -Num ACK packets (option in case there is communication with that >> neighbor)**** >> >> -Num RX packets (option in case there is communication with that >> neighbor)**** >> >> -Last ASN when it heart about that neighbor **** >> >> -Bundle: Num links in the Schedule to that neighbor**** >> >> -PDR per link [Optional -- or maybe best and worst PDR only]**** >> >> **** >> >> -Option Flag (weather there are optional TLV fields on that category)**= * >> * >> >> +(TLV objects)* **** >> >> **** >> >> -For each Queue:**** >> >> - Avg Queue length in a running window**** >> >> - Max Queue length in a running window (peak)**** >> >> - Current Queue length (?)**** >> >> - ASN of the oldest packet in the QUEUE?**** >> >> -Option Flag (weather there are optional TLV fields on that category= ) >> **** >> >> +(TLV objects)* **** >> >> **** >> >> -Time source parent**** >> >> -ID**** >> >> -Avg clock drift (correction done) in a running window**** >> >> -Latest clock correction**** >> >> -Parent changes (counter of how many times I changed my time source >> parent)**** >> >> -Option Flag (weather there are optional TLV fields on that category= ) >> **** >> >> +(TLV objects)* **** >> >> **** >> >> -Option Flag (weather there are optional TLV fields in other categories)= * >> *** >> >> +(TLV objects)* **** >> >> **** >> >> as regards to this:**** >> >> **** >> >> "Finally, do you envision a generic mechanism whereby the PCE can turn >> fields on/off, or triggered independently?"**** >> >> **** >> >> I see it as CoAP Options, where a set of bytes can be used as "clever >> bitmap" to tell what options are there, the parsing will decode option b= y >> option and will read the fields. In that way any combination of fields i= s >> supported.**** >> >> **** >> >> would that work?**** >> >> X**** >> >> **** >> >> On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote:**** >> >> Xavi,**** >> >> **** >> >> Fantastic!**** >> >> **** >> >> I believe PDR for each link might be too long to fit in a packet. While >> the mote will most likely keep that information, we could move that to t= he >> query flow, i.e. it is available to the PCE on-demand.**** >> >> **** >> >> Would you agree that the number of links in a bundle belongs to the >> neighbor? Of maybe we want a "bundle" category?**** >> >> **** >> >> In queuing, it might be interesting to see the age of the different >> packets, to be able to monitor latency.**** >> >> **** >> >> About LQI, there is no general consensus among vendors on what the >> definition is, or how exactly it is calculated. I would make it optional= . >> **** >> >> **** >> >> Also, it might be good to be able to add arbitrary fields to each >> category: neighbor, queue, time source neighbor.**** >> >> **** >> >> Finally, do you envision a generic mechanism whereby the PCE can turn >> fields on/off, or triggered independently?**** >> >> **** >> >> Thomas**** >> >> **** >> >> On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote:**** >> >> Hi Thomas, Diego,**** >> >> **** >> >> I agree that LQI should be there as well. I update here the list with >> Thomas suggestions. **** >> >> **** >> >> For each known neighbor:**** >> >> -ID**** >> >> -AVG RSSI in a running window**** >> >> -Latest RSSI**** >> >> -AVG LQI in a running window**** >> >> -Latest LQI**** >> >> -Num TX packets (option in case there is communication with that >> neighbor)**** >> >> -Num ACK packets (option in case there is communication with that >> neighbor)**** >> >> -Num RX packets (option in case there is communication with that >> neighbor)**** >> >> -Last ASN when it heart about that neighbor **** >> >> **** >> >> Other fields**** >> >> -Num links in the Schedule to that neighbor**** >> >> -For each link PDR**** >> >> -For each Queue:**** >> >> - Avg Queue length in a running window**** >> >> - Max Queue length in a running window (peak)**** >> >> - Current Queue length (?)**** >> >> -Time source parent**** >> >> -ID**** >> >> -Avg clock drift (correction done) in a running window**** >> >> -Latest clock correction**** >> >> -Parent changes (counter of how many times I changed my time source >> parent)**** >> >> **** >> >> -Option Flag (weather there are optional TLV fields)**** >> >> +(TLV objects)* **** >> >> **** >> >> **** >> >> Hope this makes sense.**** >> >> cheers! >> Xavi**** >> >> **** >> >> On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote:**** >> >> *[renamed thread]***** >> >> **** >> >> Xavi,**** >> >> **** >> >> A few thoughts:**** >> >> - the counters (numTx, etc) will only be present for neighbors the node >> has communicate with, so they should be optional in the packet.**** >> >> - you have focused on the topological information (which I think is the >> right one). It might be useful to gather other data related to >> synchronization or queuing.**** >> >> - I couldn't agree more with your suggestion to make it extensible. This >> does mean that we will need to state somewhere that a device need to ign= ore >> silently fields it does not understand.**** >> >> **** >> >> Thomas**** >> >> **** >> >> On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote:**** >> >> Hello, I guess that flows are getting defined and I started to think on >> the contents of the messages on that flows. Not sure if this is the righ= t >> time or I am going way far..**** >> >> **** >> >> According to the previous discussion I assume that the five flows are:**= * >> * >> >> **** >> >> ME-6TOP - Query Flow**** >> >> ME-6TOP - Action Flow**** >> >> **** >> >> 6TOP - ME - Report Flow**** >> >> 6TOP - ME - Event Flow**** >> >> 6TOP - ME - Request BW Flow**** >> >> **** >> >> I'd like to start defining the content of the messages in the Report Flo= w: >> **** >> >> **** >> >> The Report Flow: has to deal with the information that a node knows and >> has to be sent to the ME so the ME can compute the schedule among others= . >> Here I list the information that we can know in a mote and can be used = at >> the ME to compute the schedule (complete please if I miss something)**** >> >> **** >> >> For each known neighbor:**** >> >> -ID**** >> >> -AVG RSSI in a running window**** >> >> -Latest RSSI**** >> >> -Num TX packets**** >> >> -Num ACK packets**** >> >> -Num RX packets**** >> >> -Last ASN when it heart about that neighbor **** >> >> **** >> >> Other fields**** >> >> -Num links in the Schedule to that neighbor**** >> >> -For each link PDR**** >> >> **** >> >> **** >> >> Then we need to have some TLV like objects that can be used for >> ad-hoc/naive/other extensions of the reporting process. In that way we >> don't constraint the implementation of the scheduling alg. to that >> information.**** >> >> **** >> >> what do you think?**** >> >> X**** >> >> **** >> >> On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote:= * >> *** >> >> Hi all,**** >> >> **** >> >> In this thread, we will continue the discussion about Confirmation >> message. Here is some background information.**** >> >> **** >> >> Context: e.g.**** >> >> - node sends a report and want to know if the report is accepted., *= * >> ** >> >> - ME sends a action request and want to know if/when the action take= n. >> **** >> >> Options:**** >> >> (1) Nothing**** >> >> (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** >> >> (3) App-level ACK type**** >> >> (4) Use different flow (i.e. action flow)**** >> >> **** >> >> IMHO, different control flow may have different requirement for >> confirmation message.**** >> >> (1) Action Flow, needs a App-level confirmation, like Succ/Fail**** >> >> (2) Query Flow, automatically has the confirmation, i.e. the message >> packet corresponding to a specific query.**** >> >> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer >> option (1) and (3), i.e. the confirmation message is an option, but if a >> confirmation message is needed, it should be App-level Ack, instead of >> transport layer confirmation, which will give 6top more flexibility.**** >> >> **** >> >> What do you think?**** >> >> **** >> >> Thanks**** >> >> Qin**** >> >> **** >> >> **** >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> **** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> **** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> **** >> >> **** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> **** >> >> ** ** >> >> ** ** >> >> ** ** >> > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --bcaec52bea1949856104e62026d8 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hi Thomas,

my 5 cents.
I agree on adding NACK information and timing differences with othe= r than time source parent neighbors. I will add to the wiki :-)

As regards to the differences of what we do at 6TiSCH and WHart or ISA100.1= 1a, our proposal is more flexible and has less cohesion with a cost of incr= eased complexity (e.g configurable data and reporting period). We have to a= nalyse carefully what are the implications in terms of protocol complexity = and implementation of that mechanism versus how often they would be used. C= ould we maybe define some "templates" or default configurations s= o using the 6TiSCH can be done without configuration overhead? Then configu= ration can be used for those that are really interested on tuning their sys= tem.

just thoughts..
X



On Wed, Sep= 11, 2013 at 9:58 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu= > wrote:
Pouria,

= Wonderful list.

Your document clearly highlights t= hat (1) the "report" flows both in WirelessHART and ISA100.11a ar= e strictly periodic and (1) they have a fixed format. From what we have dis= cussed so far, the solutions we are developing is different in the followin= g ways:
  • 6TiSCH offers a mechanism allowing the PCE to configure w= hat data it want to receive, and configure the trigger for a node to genera= te from data.
  • 6TiSCH offers=A0a mechanism allowing the PCE to query= the data, on top of having the nodes push the information
  • In 6TiSCH, the format of the payload is not fixed. In particular, it is= possible to add application-specific fields, allowing for extensions.
    • =
  • In 6TiSCH,=A0the transport (CoAP?) and formatting (CBOR?) are IETF-frie= ndly and integrate well in the IPv6 stack and associated mechanisms
Did I get that right?

A coup= le of questions:
  • the WirelessHART "alarms"= correspond to a 6TiSCH "events". Yet, I suppose that a "sou= rce route failed" and "graph route failed" are out of scope = of 6TiSCH, but rather part of RPL. I would expect those to the ICMPv6 messa= ges. Thoughts?
  • About the per-channel report, I assume this is "per frequency"= ;, right? Is a channel report generated for each neighbor?
  • When com= paring your list to Xavi's=A0https://bitbucket= .org/6tsch/meetings/wiki/report_flow_contents:
    • we might want to add a "numNACK" counter to the neighbor = information
    • we might want to keep timing statistics for all neighbo= rs, not just time source parents. That is, when I receive a packet from a n= eighbor which is not my time source neighbor, I do not change my clock, but= I still know the timing error.
Thomas

On Wed, Sep 11, 2013 at 7:18 AM, &= lt;P.Zand@utwente.nl= > wrote:

Dear All,

In the following, I listed the performance metrics reported to t= he Network/System Manager in WirelessHART and ISA100.11a.

Some reports still need be added, for example the path failure a= lerts in ISA100.11a.

Pouria

=A0

WirelessHART performance metrics

In WirelessHART[1] net= work the statistics and events are reported to the Network Manager (act lik= e PCE in 6TiSCH) through the following commands:

  1. Report =93Device Health=94

This report is sent periodically toward the Network Manager. The report= summaries the communication statistics of a device.

Byte

Format<= /u>

Descriptio= n

0-1=

Unsigned-1= 6

Number of = packets generated by this device since last report

2-3=

Unsigned-1= 6

Number of = packets terminated by this device since last report

4

Unsigned-8=

Number of = Data-Link Layer MAC MIC failures detected

5

Unsigned-8=

Number of = Network Layer (Session) MIC failures detected

6

Enum-8<= /u>

Power Stat= us

7

Unsigned-8=

Number of = CRC Errors detected

=A0

  1. Report =93Neighbor Health List=94

This report is sent periodically toward the Network Manager. The report= includes the statistics of linked neighbors.

Byte

Format<= /u>

Descriptio= n

0

Unsigned-8=

Neighbor t= able index

1

Unsigned-8=

Number of = Neighbor entries read

2

Unsigned-8=

Total numb= er of neighbors

3-4=

Unsigned-1= 6

Nickname o= f neighbor

5

Bit-8

Neighbor F= lags

6

Signed-8

Mean RSL (= Receive Signal Level in dBm) since last report

7-8=

Unsigned-1= 6

Number of = Packets transmitted to this neighbor

9-10

Unsigned-1= 6

Number of = Packets received from this neighbor

11-12

Unsigned-1= 6

Packets re= ceived from this neighbor

13-=85<= /u>

=A0=

Number of = entries based on response byte 1

=A0

  1. Report =93Neighbor Signal Levels=94

This report is sent periodically toward the Network Manager. The report= includes the statistics of discovered (but not linked) neighbors. These ne= ighbors might be discovered when a device has heard the neighbor communication in the discovery links.= A device that wish to join a network, send a join request to the Network m= anager, including this report.

Byte

Format<= /u>

Descriptio= n

0

Unsigned-8=

Neighbor t= able index

1

Unsigned-8=

Number of = Neighbor entries read

2

Unsigned-8=

Total numb= er of neighbors

3-4=

Unsigned-1= 6

Nickname o= f neighbor

5

Signed-8

RSL of nei= ghbor in dB

6-8=

=A0=

Repeats (a= s needed) based on response byte 1

=A0

  1. Alarm =93Path Down=94

The alarm is sent upon detecting a path failure.

Byte

Format<= /u>

Descriptio= n

0-1=

Unsigned-1= 6

Nickname o= f neighbor to which path failure was detected

=A0

  1. Alarm "Source Route Failed"

This alarm is sent upon detecting a source route failure.=

Byte

Format

Descriptio= n

0-1=

Unsigned-1= 6

Nickname o= f unreachable neighbor in the source route

2-5=

Unsigned-3= 2

Network-La= yer MIC (i.e., the MIC generated using the session key) from the NPDU that = failed routing

=A0

  1. Alarm "Graph Route Failed"

This alarm is sent upon detecting a graph route failure.<= /span>

Byte

Format<= /u>

Descriptio= n

0-1=

Unsigned-1= 6

Graph Id o= f the failed route

=A0

=A0

ISA100.11a performance metric

In ISA100.11a[2], the = L2 performance metrics are reported to the System Manager (act like PCE in = 6TiSCH) and can be classified into (1) DL_Connectivity alert and (2) NeighborDiscovery= alert.

  1. DL_Connectivity alert

The DL_connectivity alert can be classified into (a) Per-neighbor repor= ts and (b) Per-channel reports.

    • Per-neighbor report

Per-neighbor reports are the=A0 performance metrics about the neighbors= connection and are reported to the System Manager. These statistics are ac= cumulated in the =93dlmo.NeighborDiag=94 attribute, for each neighbor. This report is similar to =93Neighbor Health= List=94 report in WirelessHART.

Each node in ISA100.11a might be asked to report the following statisti= cs about its neighbor:

=A0

Octets<= /u>

Format<= /u>

Descriptio= n

1

Signed-8

RSSI (leve= l)

1

Unsigned-8=

RSQI (leve= l)

1-2=

ExtDLUint<= u>

RxDPDU(cou= nt): Number of valid Packets received from this neighbor

1-2=

ExtDLUint<= u>

TxSuccessf= ul (count):Count of successful unicast transmissions to the neighbor

1-2=

ExtDLUint<= u>

TxFailed (= count): Number of unicast transmission, without=A0 getting any ACK or NACK<= u>

1-2=

ExtDLUint<= u>

TxCCA_Back= off (count): Number of unicast transmission aborted due to CCA

1-2=

ExtDLUint<= u>

TxNACK (co= unt): Number of NACKs received

2

Signed-16<= u>

ClockSigma= (level): A rough estimate of standard deviation of clock corrections

=A0

    • Per-channel report

In addition, in ISA100.11a, several performance metrics are reported ba= sed on channel for all neighbors to the System Manager. These statistics ar= e accumulated in the =93dlmo.ChannelDiag=94 attribute. This report is similar to =93Device Health=94 report in Wireles= sHART.

Byte

Format<= /u>

Descriptio= n

0-2=

Unsigned-1= 6

Count (Num= ber of attempted unicast transmissions for all channels)

3

Integer-8<= u>

(Percentage of time transmissions on channel 0 did not receive an ACK)<= /u>

4

Integer-8<= u>

(Percentage of time transmissions on channel 0 aborted due to CCA)<= u>

=85=

=A0=

=A0=

33<= u>

Integer-8<= u>

(Percentage of time transmissions on channel 15 did not receive an ACK)=

34<= u>

Integer-8<= u>

(Percentage of time transmissions on channel 15 aborted due to CCA)=

=A0

  1. NeighborDiscovery alert

In ISA100.11a, each node sends a report, including a list of candidate = (overheard) neighbors, to the System Manager to make a potential new routin= g decisions. The =93dlmo.Candidates=94 attributed is used to store those information in each node in the L2. This= report is similar to the =93Neighbor Signal Levels=94 report in WirelessHA= RT.

Octets<= /u>

Format<= /u>

Descriptio= n

1

Unsigned-8=

N (count o= f discovered neighbors)

0-2=

ExtDlUint<= u>

address

0-1=

Signed-8

0-1=

Unsigned-8=

=85=

=A0=

=A0=

0-2=

ExtDlUint<= u>

address

0-1=

Signed-8

0-1=

Unsigned-8=

=A0

=A0

References

1.=A0=A0=A0=A0=A0=A0 IEC 62591: Industr= ial Communication Networks - Wireless Communication Network and Communicati= on Profiles - WirelessHART.

=A0

2.=A0=A0=A0=A0=A0=A0 IEC 62734: Industr= ial communication networks - Fieldbus specifications - Wireless systems for= industrial automation: process control and related applications - ISA100.11a.

=A0

=A0

=A0

From: 6tsch-bounces@ietf.o= rg [mailto:= 6tsch-bounces@ietf.org] On Behalf Of Thomas Watteyne
Sent: Saturday, September 07, 2013 7:43 PM
To: Xavi Vilajosana
Cc: Pascal Thubert (pthubert); 6tsch@ietf.org
Subject: Re: [6tsch] report flow contents

=A0

Xavi,

Great, thanks!

Thomas

=A0

On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen <xvilajosana@eecs.b= erkeley.edu> wrote:

Hi,
I created the scratchpad section in the wiki to keep ideas
https://bitbucket.org/6tsch/meetings/wiki/Home


and added the flow content information here.

https://bitbucket.org/6tsch/meetings/wiki/report_flow_con= tents

have a nice weekend!

X

=A0

On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen <xvilajosana@eec= s.berkeley.edu> wrote:

Hi Pascal, it is a good idea!=

I will collect that information and as Thomas put it at the wiki so we d= o not lose it.

:-)

X

=A0

On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) <pthubert@cisco.com> wr= ote:

Hello Xavi:

=A0

At the call I mentioned we could use info on tracks and cells as= well, probably on demand from the PCE.

For instance, the PCE could observe energy levels over some cell= s for=A0 a while to make sure they are clean.

=A0

What do you think?

Pascal

=A0

From: 6tsch-bounces@i= etf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
Sent: vendredi 6 septembre 2013 01:17
To: Thomas Watteyne
Cc: 6tsch@ietf.o= rg
Subject: Re: [6tsch] report flow contents

=A0

agreed!

So the fields become:

=A0

=A0

For each kn= own neighbor:

=A0-ID

=A0-AVG RSS= I in a running window

=A0-Latest = RSSI

=A0-AVG LQI= in a running window [optional]

=A0-Latest = LQI [optional]

=A0-Num TX = packets (option in case there is communication with that neighbor)

=A0-Num ACK= packets (option in case there is communication with that neighbor)<= u>

=A0-Num RX = packets (option in case there is communication with that neighbor)

=A0-Last AS= N when it heart about that neighbor=A0

=A0-Bundle:= Num links in the Schedule to that neighbor

=A0 =A0 =A0= -PDR per link [Optional -- or maybe best and worst PDR only]=

=A0

=A0-Option Flag (weather there are optional TLV fields on that cat= egory)

=A0 =A0+(TLV objects)*=A0

=A0<= u>

=A0-For eac= h Queue:

=A0 =A0 - A= vg Queue length in a running window

=A0 =A0 - M= ax Queue length in a running window (peak)

=A0 =A0 - C= urrent Queue length (?)

=A0 =A0 - A= SN of the oldest packet in the QUEUE?

=A0 =A0 -Op= tion Flag (weather there are optional TLV fields on that category)

=A0 =A0 =A0= =A0 +(TLV objects)*=A0

=A0<= u>

-Time sourc= e parent

=A0 =A0 -ID=

=A0 =A0 -Av= g clock drift (correction done) in a running window

=A0 =A0 -La= test clock correction

=A0 =A0 -Pa= rent changes (counter of how many times I changed my time source parent)

=A0 =A0 -Op= tion Flag (weather there are optional TLV fields on that category)

=A0 =A0 +(T= LV objects)*=A0

=A0<= u>

-Option Fla= g (weather there are optional TLV fields in other categories)=

=A0 =A0+(TL= V objects)*=A0

=A0

as regards to this:

=A0

"Final= ly, do you envision a generic mechanism whereby the PCE can turn fields on/= off, or triggered independently?"

=A0

I see it as CoAP Options, w= here a set of bytes can be used as "clever bitmap" to tell what o= ptions are there, the parsing will decode option by option and will read the fields. In that way any combination of = fields is supported.

=A0

would that work?<= /u>

X

=A0

On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <watteyne@eecs.berkeley.edu&= gt; wrote:

Xavi,

=A0

Fantastic!

=A0

I believe PDR for each link might be too long to fit in a packet. While = the mote will most likely keep that information, we could move that to the = query flow, i.e. it is available to the PCE on-demand.

=A0

Would you agree that the number of links in a bundle belongs to the neig= hbor? Of maybe we want a "bundle" category?

=A0

In queuing, it might be interesting to see the age of the different pack= ets, to be able to monitor latency.

=A0

About LQI, there is no general consensus among vendors on what the defin= ition is, or how exactly it is calculated. I would make it optional.=

=A0

Also, it might be good to be able to add arbitrary fields to each catego= ry: neighbor, queue, time source neighbor.

=A0

Finally, do you envision a generic mechanism whereby the PCE can turn fi= elds on/off, or triggered independently?

=A0

Thomas

=A0

On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen <xvilajosana@eec= s.berkeley.edu> wrote:

Hi Thomas, Diego,

=A0

I agree that LQI should be there as well. I update here the list with Th= omas suggestions.=A0

=A0

For each kn= own neighbor:

=A0-ID

=A0-AVG RSS= I in a running window

=A0-Latest = RSSI

=A0-AVG LQI= in a running window

=A0-Latest = LQI

=A0-Num TX = packets (option in case there is communication with that neighbor)

=A0-Num ACK= packets (option in case there is communication with that neighbor)<= u>

=A0-Num RX = packets (option in case there is communication with that neighbor)

=A0-Last AS= N when it heart about that neighbor=A0

=A0<= u>

Other field= s

=A0-Num lin= ks in the Schedule to that neighbor

=A0 =A0 -Fo= r each link PDR

=A0-For each Queue:

=A0 =A0 - Avg Queue length in a running window

=A0 =A0 - Max Queue length in a running window (peak)

=A0 =A0 - Current Queue length (?)

-Time source parent

=A0 =A0 -ID

=A0 =A0 -Avg clock drift (correction done) in a running window=

=A0 =A0 -Latest clock correction

=A0 =A0 -Parent changes (counter of how many times I changed my time sou= rce parent)

=A0

-Option Flag (weather there are optional TLV fields)

=A0 =A0+(TLV objects)*=A0

=A0

=A0

Hope this makes sense.

cheers!
Xavi

=A0

On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu= > wrote:

[renamed = thread]

=A0

Xavi,=

=A0

A few though= ts:

- the counte= rs (numTx, etc) will only be present for neighbors the node has communicate= with, so they should be optional in the packet.

- you have f= ocused on the topological information (which I think is the right one). It = might be useful to gather other data related to synchronization or queuing.

- I couldn&#= 39;t agree more with your suggestion to make it extensible. This does mean = that we will need to state somewhere that a device need to ignore silently fields it does not understand.

=A0

Thomas

=A0

On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen <xvilajosana@eec= s.berkeley.edu> wrote:

Hello, I guess that flows are getting defined and I started to think on = the contents of the messages on that flows. Not sure if this is the right t= ime or I am going way far..

=A0

According to the previous discussion I assume that the five flows are:

=A0

ME-6TOP - Query Flow

ME-6TOP - Action Flow

=A0

6TOP - ME - Report Flow

6TOP - ME - Event Flow

6TOP - ME - Request BW Flow

=A0

I'd like to start defining the content of the messages in the Report= Flow:

=A0

The Report Flow: has to deal with the information that a node knows and = has to be sent to the ME so the ME can compute the schedule among others. H= ere I list =A0the information that we can know in a mote and can be used at the ME to compute the schedule (c= omplete please if I miss something)

=A0

For each known neighbor:

=A0-ID

=A0-AVG RSSI in a running window

=A0-Latest RSSI

=A0-Num TX packets

=A0-Num ACK packets

=A0-Num RX packets

=A0-Last ASN when it heart about that neighbor=A0

=A0

Other fields

=A0-Num links in the Schedule to that neighbor

=A0 =A0 -For each link PDR

=A0

=A0

Then we need to have some TLV like objects that can be used for ad-hoc/n= aive/other extensions of the reporting process. In that way we don't co= nstraint the implementation of the scheduling alg. to that information.

=A0

what do you think?

X

=A0

On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:=

Hi all,

=A0

In this thread, we will continue the di= scussion about Confirmation message. Here is some background information.

=A0

Context: e.g.

=A0 =A0 - node sends a report and want = to know if the report is accepted.,=A0

=A0 =A0 - ME sends a action request and= want to know if/when the action taken.

Options:

=A0 =A0(1) Nothing=

=A0 =A0(2) Rely on transport mechanism = (e.g. confirmable CoAP message)

=A0 =A0(3) App-level ACK type=

=A0 =A0(4) Use different flow (i.e. act= ion flow)

=A0

IMHO, different control flow may have d= ifferent requirement for confirmation message.

=A0 =A0 (1) Action Flow, needs a App-le= vel confirmation, like Succ/Fail

=A0 =A0 (2) Query Flow, automatically h= as the confirmation, i.e. the message packet corresponding to a specific qu= ery.

=A0 =A0 (3) Report Flow and Event Flow,= option (1)-(3) are OK, but I prefer option (1) and (3), i.e. the confirmat= ion message is an option, but if a confirmation message is needed, it should be App-level Ack, instead of transport layer = confirmation, which will give 6top more flexibility.

=A0

What do you think?=

=A0

Thanks

Qin

=A0 =A0=A0

=A0

___________________________________________= ____
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0

=A0

=A0

=A0



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Wed, 11 Sep 2013 13:45:01 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0 X-Spam-Level: X-Spam-Status: No, score=x tagged_above=-999 required=5 tests=[] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id c-UbHxicn4l5 for <6tsch@ietfa.amsl.com>; Wed, 11 Sep 2013 13:45:00 -0700 (PDT) Received: from EXEDGE02.ad.utwente.nl (exedge02.ad.utwente.nl [130.89.5.49]) by ietfa.amsl.com (Postfix) with ESMTP id D1C3921E80CE for <6tsch@ietf.org>; Wed, 11 Sep 2013 13:44:56 -0700 (PDT) Received: from EXHUB02.ad.utwente.nl (130.89.4.229) by EXEDGE02.ad.utwente.nl (130.89.5.49) with Microsoft SMTP Server (TLS) id 14.2.328.9; Wed, 11 Sep 2013 22:44:56 +0200 Received: from EXMBX23.ad.utwente.nl ([169.254.3.13]) by EXHUB02.ad.utwente.nl ([130.89.4.229]) with mapi id 14.02.0328.009; Wed, 11 Sep 2013 22:44:53 +0200 From: To: , Thread-Topic: [6tsch] report flow contents Thread-Index: AQHOqmeRdn+u8+L3JUGYWl1pnrYuVpm3azMAgAA2pACAAAP1gIABFasAgAAfWwCAAGmlgIABKJyAgAYvvkCAAA0/AIAAIEEAgAA8AMA= Date: Wed, 11 Sep 2013 20:44:52 +0000 Message-ID: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [130.89.12.149] Content-Type: multipart/mixed; boundary="_021_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47EXMBX23adutwent_" MIME-Version: 1.0 Cc: 6tsch@ietf.org Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2013 20:45:01 -0000 --_021_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47EXMBX23adutwent_ Content-Type: multipart/related; boundary="_020_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47EXMBX23adutwent_"; type="multipart/alternative" --_020_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47EXMBX23adutwent_ Content-Type: multipart/alternative; boundary="_000_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47EXMBX23adutwent_" --_000_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47EXMBX23adutwent_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Thomas, I agree with you that "source route failed" and "graph route failed" are ou= t of scope of 6TiSCH. Regarding to you question about the per-channel report, I think they are ba= sed on each radio channel supported by the specification (channel 11-26 in = 2.4GHz in IEEE 802.15.4), not channel offset. And a channel report generate= d for all neighbor. Regarding to your first question, let me now explain more. I think both of = these standard provide a mechanisms to make it possible for System/Network = Manager to also read (pull) desired attributes (But not all the feature in = 6TiSCH). For example in WirelessHART [1], by "Report Neighbor Health List" = request, the network manager might mention the number of neighbors to be re= ad in "Number of Neighbor entries read" field.. I think, ISA100.11a provides more mechanisms for System manager to get the = desired attributes from the field devices. And the first two features that = you mentioned might also be supported by ISA100.11a. In ISA100.11a, three mechanisms are provided for reporting diagnostic infor= mation contained in dlmo.NeighborDiag (described in section 1 later) and dl= mo.ChannelDiag (described in Section 2 later): 1. The health reports concentrator object (HRCO), can be configured to r= eport any attribute in the DL on a periodic basis. dlmo.NeighborDiag entrie= s (shown in Table 2) and dlmo.ChannelDiag (shown in Table 5) can be reporte= d through that mechanism. Through the HRCO, the system manager can configur= e the device to report NeighborDiag periodically, such as every 30 minutes.= Following each such report, on a per-entry basis, NeighborDiag counts shal= l be reset to zero. Levels shall use the current value as a starting point = for the next period [2]. 2. Diagnostic information can be retrieved at any time by the system man= ager, by reading the applicable attributes. The system manager can read (po= ll) NeighborDiag as a read-only attribute on a per-entry basis. As in an HR= CO report, counts shall be reset to zero when read [2]. 3. Diagnostic information can be reported by the DL on an exception basi= s, through the DL_Connectivity alert (Described in section 3(a)). The DL ca= n additionally be configured, through the dlmo.AlertPolicy attribute (shown= in Table 6), to report NeighborDiag information when diagnostic values exc= eed a threshold. Only the row triggering the alert is reported. No values a= re reset [2]. In ISA100.11a, the system manager establishes a DL communication relationsh= ip between a device and its neighbor by adding an entry to the device's dlm= o.Neighbor attribute (see Table 1). Each such entry specifies a level of di= agnostics to be collected, through the field dlmo.Neighbor[].DiagLevel. For= each neighbor, diagnostics may be collected at a baseline level, or a deta= iled level including clock diagnostics [2]. This levels are described in Se= ction 1. Table 1. dlmo.Neighbor fields [2] Field name Field encoding * Index (16-bit address of neighbor) ExtDlUint (used as an index) EUI64 (EUI-64 identifier of the neighbor) Type: Unsigned64 ... ... DiagLevel (selection of neighbor diagnostics to collect) Type: Unsigned2 Bit0 =3D 1 Collect link diagnostics Bit1 =3D 1 Collect clock diagnostics ... ... When the dlmo.Neighbor[].DiagLevel field is set for a particular neighbor, = the DL shall create corresponding entries in the read-only attribute dlmo.N= eighborDiag. NeighborDiag values are accumulated from the time that the dlm= o.NeighborDiag entry is created [2]. 1. dlmo.NeighborDiag: dlmo.NeighborDiag is an indexed OctetString collection that contains diagno= stics for a set of neighbors. The attribute is read-only, with rows created= as needed by the DL [2]. NeighborDiag entries are instantiated by the system manager, by setting dlm= o.Neighbor[].DiagLevel bits to non-zero values. Iff (if and only if) Bit0= =3D1, then summary diagnostics shall be collected for the neighbor, consoli= dated across all channels. Iff Bit1=3D1, then detailed clock diagnostics sh= all be collected for the neighbor, consolidated across all radio channels [= 2]. Table 2. dlmo.NeighborDiag fields [2] Field name Field encoding * Index Type: ExtDlUint (neighbor address, used as an index) Summary Type: OctetString (see Table 3) ClockDetail Type: OctetString (see Table 4) Table 3. Diagnostic Summary OctetString fields [2] Field name Field encoding RSSI (level) Type: Integer8 RSQI (level) Type: Unsigned8 RxDPDU (count) Type: ExtDlUint TxSuccessful (count) Type: ExtDlUint TxFailed (count) Type: ExtDlUint TxCCA_Backoff (count) Type: ExtDlUint TxNACK (count) Type: ExtDlUint ClockSigma (level) Type: Integer16 Table 4. Diagnostic ClockDetail OctetString fields [2] Field name Field encoding ClockBias (level, signed) Type: Integer16 ClockCount (count) Type: ExtDlUint ClockTimeout (count) Type: ExtDlUint ClockOutliers (count) Type: ExtDlUint 2. dlmo.ChannelDiag: dlmo.ChannelDiag is a read-only dynamic attribute that reports DPDU transmi= t failure rates on each radio channel supported by the specification. This = enables the system manager to be aware of consistent connectivity problems = on a per-channel basis, as a diagnostic for spectrum management in a subnet= [2]. Two diagnostics are reported for each channel, each indicating a different = type of failure. [cid:image002.png@01CEAF40.860ADE30] indicates the percen= tage of time that unicast DPDU transmissions on channel N did not receive a= n ACK or a NACK. [cid:image004.png@01CEAF40.860ADE30] indicates the percen= tage of time that unicast DPDU transmissions on channel N were aborted due = to CCA. [2] Table 5. dlmo.ChannelDiag fields Field name Field encoding Count (Number of attempted unicast transmissions for all channels) Type:Unsigned16 [cid:image006.png@01CEAF40.860ADE30] (Percentage of time transmissions on c= hannel 0 did not receive an ACK) Type: Integer8 [cid:image008.png@01CEAF40.860ADE30] (Percentage of time transmissions on c= hannel 0 aborted due to CCA) Type: Integer8 ... [cid:image010.png@01CEAF40.860ADE30] (Percentage of time transmissions on c= hannel 15 did not receive an ACK) Type: Integer8 [cid:image012.png@01CEAF40.860ADE30] (Percentage of time transmissions on c= hannel 15 aborted due to CCA) Type: Integer8 3. Data link layer alerts 1. DL_Connectivity alert DL performance diagnostics are accumulated in the attributes dlmo.NeighborD= iag for per-neighbor diagnostics, and dlmo.ChannelDiag for per-channel diag= nostics. Normally the system manager configures the HRCO to report these di= agnostics periodically, and the DL automatically resets the diagnostic coun= ters whenever these attributes are so reported. Between such reports, diagn= ostics may indicate a problem that needs to be reported to the system manag= er immediately. The DL_Connectivity alert provides the mechanism for the DL= to report such issues, and the dlmo.AlertPolicy attribute enables the syst= em manager to set thresholds for such reporting [2]. The attribute dlmo.AlertPolicy enables/disables the DL_Connectivity alert a= nd provides thresholds to control whether alerts are reported. dlmo.AlertPo= licy is an OctetString containing fields as shown in Table 6 [2]. Table 6. dlmo.AlertPolicy fields Field name Field scalar type Descriptor (Enables or disabled the DL_Connectivity alert.) Type Alert report descriptor NeiMinUnicast (Minimum number of unicast transactions needed for a neighbor= report.) Type: ExtDlUint NeiErrThresh (Report neighbor diagnostic if the percentage error rate reach= es this threshold ) Type: Unsigned8 ChanMinUnicast (Minimum number of unicast transactions on a channel needed = as a pre-condition for triggering an alert.) Type: ExtDlUint NoAckThresh (Report ChannelDiag if a NoAck value is greater than this thres= hold) Type: Unsigned8 CCABackoffThresh (Report ChannelDiag if a CCABackoff value is greater than = this threshold) Type: Unsigned8 1. NeighborDiscovery alert The NeighborDiscovery alert provides a mechanism for the DL to report the c= ontents of the OctetString in dlmo.Candidates attribute (see Table 7). The neighbors in the dlmo.Neighbor attribute are set by the system manager,= not by the device itself. The DL autonomously builds a list of candidate n= eighbors in the dlmo.Candidates attribute. This list is then forwarded to t= he system manager. The system manager considers the radio connectivity that= is reported in dlmo.Candidates, but may also consider other criteria such = as resource constraints, historical performance, or subnet topology [2]. Table 7. dlmo.Candidates OctetString fields Field name Field encoding N (count of discovered neighbors) Type: Unsigned8 Neighbor1 (16-bit address of first candidate) Type: ExtDlUint RSSI1 (radio signal quality of first candidate) Type: Integer8 RSQI1 (radio signal quality of first candidate) Type: Unsigned8 etc... NeighborN (16-bit address of Nth candidate) Type: ExtDlUint RSSIN (radio signal quality of Nth candidate) Type: Integer8 RSQIN (radio signal quality of Nth candidate) Type: Unsigned8 References 1. IEC 62591: Industrial Communication Networks - Wireless Commu= nication Network and Communication Profiles - WirelessHART. 2. IEC 62734: Industrial communication networks - Fieldbus speci= fications - Wireless systems for industrial automation: process control and= related applications - ISA100.11a. From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of X= avier Vilajosana Guillen Sent: Wednesday, September 11, 2013 8:54 PM To: Thomas Watteyne Cc: 6TSCH Subject: Re: [6tsch] report flow contents Hi Thomas, my 5 cents. I agree on adding NACK information and timing differences with other than t= ime source parent neighbors. I will add to the wiki :-) As regards to the differences of what we do at 6TiSCH and WHart or ISA100.1= 1a, our proposal is more flexible and has less cohesion with a cost of incr= eased complexity (e.g configurable data and reporting period). We have to a= nalyse carefully what are the implications in terms of protocol complexity = and implementation of that mechanism versus how often they would be used. C= ould we maybe define some "templates" or default configurations so using th= e 6TiSCH can be done without configuration overhead? Then configuration can= be used for those that are really interested on tuning their system. just thoughts.. X On Wed, Sep 11, 2013 at 9:58 AM, Thomas Watteyne > wrote: Pouria, Wonderful list. Your document clearly highlights that (1) the "report" flows both in Wirele= ssHART and ISA100.11a are strictly periodic and (1) they have a fixed forma= t. From what we have discussed so far, the solutions we are developing is d= ifferent in the following ways: * 6TiSCH offers a mechanism allowing the PCE to configure what data it = want to receive, and configure the trigger for a node to generate from data= . * 6TiSCH offers a mechanism allowing the PCE to query the data, on top = of having the nodes push the information * In 6TiSCH, the format of the payload is not fixed. In particular, it = is possible to add application-specific fields, allowing for extensions. * In 6TiSCH, the transport (CoAP?) and formatting (CBOR?) are IETF-frie= ndly and integrate well in the IPv6 stack and associated mechanisms Did I get that right? A couple of questions: * the WirelessHART "alarms" correspond to a 6TiSCH "events". Yet, I sup= pose that a "source route failed" and "graph route failed" are out of scope= of 6TiSCH, but rather part of RPL. I would expect those to the ICMPv6 mess= ages. Thoughts? * About the per-channel report, I assume this is "per frequency", right= ? Is a channel report generated for each neighbor? * When comparing your list to Xavi's https://bitbucket.org/6tsch/meetin= gs/wiki/report_flow_contents: * we might want to add a "numNACK" counter to the neighbor informati= on * we might want to keep timing statistics for all neighbors, not jus= t time source parents. That is, when I receive a packet from a neighbor whi= ch is not my time source neighbor, I do not change my clock, but I still kn= ow the timing error. Thomas On Wed, Sep 11, 2013 at 7:18 AM, > wrote: Dear All, In the following, I listed the performance metrics reported to the Network/= System Manager in WirelessHART and ISA100.11a. Some reports still need be added, for example the path failure alerts in IS= A100.11a. Pouria WirelessHART performance metrics In WirelessHART[1] network the statistics and events are reported to the Ne= twork Manager (act like PCE in 6TiSCH) through the following commands: 1. Report "Device Health" This report is sent periodically toward the Network Manager. The report sum= maries the communication statistics of a device. Byte Format Description 0-1 Unsigned-16 Number of packets generated by this device since last report 2-3 Unsigned-16 Number of packets terminated by this device since last report 4 Unsigned-8 Number of Data-Link Layer MAC MIC failures detected 5 Unsigned-8 Number of Network Layer (Session) MIC failures detected 6 Enum-8 Power Status 7 Unsigned-8 Number of CRC Errors detected 1. Report "Neighbor Health List" This report is sent periodically toward the Network Manager. The report inc= ludes the statistics of linked neighbors. Byte Format Description 0 Unsigned-8 Neighbor table index 1 Unsigned-8 Number of Neighbor entries read 2 Unsigned-8 Total number of neighbors 3-4 Unsigned-16 Nickname of neighbor 5 Bit-8 Neighbor Flags 6 Signed-8 Mean RSL (Receive Signal Level in dBm) since last report 7-8 Unsigned-16 Number of Packets transmitted to this neighbor 9-10 Unsigned-16 Number of Packets received from this neighbor 11-12 Unsigned-16 Packets received from this neighbor 13-... Number of entries based on response byte 1 1. Report "Neighbor Signal Levels" This report is sent periodically toward the Network Manager. The report inc= ludes the statistics of discovered (but not linked) neighbors. These neighb= ors might be discovered when a device has heard the neighbor communication = in the discovery links. A device that wish to join a network, send a join r= equest to the Network manager, including this report. Byte Format Description 0 Unsigned-8 Neighbor table index 1 Unsigned-8 Number of Neighbor entries read 2 Unsigned-8 Total number of neighbors 3-4 Unsigned-16 Nickname of neighbor 5 Signed-8 RSL of neighbor in dB 6-8 Repeats (as needed) based on response byte 1 1. Alarm "Path Down" The alarm is sent upon detecting a path failure. Byte Format Description 0-1 Unsigned-16 Nickname of neighbor to which path failure was detected 1. Alarm "Source Route Failed" This alarm is sent upon detecting a source route failure. Byte Format Description 0-1 Unsigned-16 Nickname of unreachable neighbor in the source route 2-5 Unsigned-32 Network-Layer MIC (i.e., the MIC generated using the session key) from the = NPDU that failed routing 1. Alarm "Graph Route Failed" This alarm is sent upon detecting a graph route failure. Byte Format Description 0-1 Unsigned-16 Graph Id of the failed route ISA100.11a performance metric In ISA100.11a[2], the L2 performance metrics are reported to the System Man= ager (act like PCE in 6TiSCH) and can be classified into (1) DL_Connectivit= y alert and (2) NeighborDiscovery alert. 1. DL_Connectivity alert The DL_connectivity alert can be classified into (a) Per-neighbor reports a= nd (b) Per-channel reports. * Per-neighbor report Per-neighbor reports are the performance metrics about the neighbors conne= ction and are reported to the System Manager. These statistics are accumula= ted in the "dlmo.NeighborDiag" attribute, for each neighbor. This report is= similar to "Neighbor Health List" report in WirelessHART. Each node in ISA100.11a might be asked to report the following statistics a= bout its neighbor: Octets Format Description 1 Signed-8 RSSI (level) 1 Unsigned-8 RSQI (level) 1-2 ExtDLUint RxDPDU(count): Number of valid Packets received from this neighbor 1-2 ExtDLUint TxSuccessful (count):Count of successful unicast transmissions to the neigh= bor 1-2 ExtDLUint TxFailed (count): Number of unicast transmission, without getting any ACK = or NACK 1-2 ExtDLUint TxCCA_Backoff (count): Number of unicast transmission aborted due to CCA 1-2 ExtDLUint TxNACK (count): Number of NACKs received 2 Signed-16 ClockSigma (level): A rough estimate of standard deviation of clock correct= ions * Per-channel report In addition, in ISA100.11a, several performance metrics are reported based = on channel for all neighbors to the System Manager. These statistics are ac= cumulated in the "dlmo.ChannelDiag" attribute. This report is similar to "D= evice Health" report in WirelessHART. Byte Format Description 0-2 Unsigned-16 Count (Number of attempted unicast transmissions for all channels) 3 Integer-8 [cid:image013.png@01CEAF3E.C7C01310](Percentage of time transmissions on ch= annel 0 did not receive an ACK) 4 Integer-8 [cid:image014.png@01CEAF3E.C7C01310](Percentage of time transmissions on ch= annel 0 aborted due to CCA) ... 33 Integer-8 [cid:image015.png@01CEAF3E.C7C01310](Percentage of time transmissions on ch= annel 15 did not receive an ACK) 34 Integer-8 [cid:image016.png@01CEAF3E.C7C01310](Percentage of time transmissions on ch= annel 15 aborted due to CCA) 1. NeighborDiscovery alert In ISA100.11a, each node sends a report, including a list of candidate (ove= rheard) neighbors, to the System Manager to make a potential new routing de= cisions. The "dlmo.Candidates" attributed is used to store those informatio= n in each node in the L2. This report is similar to the "Neighbor Signal Le= vels" report in WirelessHART. Octets Format Description 1 Unsigned-8 N (count of discovered neighbors) 0-2 ExtDlUint [cid:image017.png@01CEAF3E.C7C01310]address 0-1 Signed-8 [cid:image018.png@01CEAF3E.C7C01310] 0-1 Unsigned-8 [cid:image019.png@01CEAF3E.C7C01310] ... 0-2 ExtDlUint [cid:image020.png@01CEAF3E.C7C01310]address 0-1 Signed-8 [cid:image021.png@01CEAF3E.C7C01310] 0-1 Unsigned-8 [cid:image022.png@01CEAF3E.C7C01310] References 1. IEC 62591: Industrial Communication Networks - Wireless Communicat= ion Network and Communication Profiles - WirelessHART. 2. IEC 62734: Industrial communication networks - Fieldbus specificat= ions - Wireless systems for industrial automation: process control and rela= ted applications - ISA100.11a. From: 6tsch-bounces@ietf.org [mailto:6tsch-b= ounces@ietf.org] On Behalf Of Thomas Watteyn= e Sent: Saturday, September 07, 2013 7:43 PM To: Xavi Vilajosana Cc: Pascal Thubert (pthubert); 6tsch@ietf.org Subject: Re: [6tsch] report flow contents Xavi, Great, thanks! Thomas On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen > wrote: Hi, I created the scratchpad section in the wiki to keep ideas https://bitbucket.org/6tsch/meetings/wiki/Home and added the flow content information here. https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents have a nice weekend! X On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen > wrote: Hi Pascal, it is a good idea! I will collect that information and as Thomas put it at the wiki so we do n= ot lose it. :-) X On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) > wrote: Hello Xavi: At the call I mentioned we could use info on tracks and cells as well, prob= ably on demand from the PCE. For instance, the PCE could observe energy levels over some cells for a wh= ile to make sure they are clean. What do you think? Pascal From: 6tsch-bounces@ietf.org [mailto:6tsch-b= ounces@ietf.org] On Behalf Of Xavier Vilajos= ana Guillen Sent: vendredi 6 septembre 2013 01:17 To: Thomas Watteyne Cc: 6tsch@ietf.org Subject: Re: [6tsch] report flow contents agreed! So the fields become: For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -AVG LQI in a running window [optional] -Latest LQI [optional] -Num TX packets (option in case there is communication with that neighbor) -Num ACK packets (option in case there is communication with that neighbor= ) -Num RX packets (option in case there is communication with that neighbor) -Last ASN when it heart about that neighbor -Bundle: Num links in the Schedule to that neighbor -PDR per link [Optional -- or maybe best and worst PDR only] -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -For each Queue: - Avg Queue length in a running window - Max Queue length in a running window (peak) - Current Queue length (?) - ASN of the oldest packet in the QUEUE? -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -Time source parent -ID -Avg clock drift (correction done) in a running window -Latest clock correction -Parent changes (counter of how many times I changed my time source par= ent) -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -Option Flag (weather there are optional TLV fields in other categories) +(TLV objects)* as regards to this: "Finally, do you envision a generic mechanism whereby the PCE can turn fiel= ds on/off, or triggered independently?" I see it as CoAP Options, where a set of bytes can be used as "clever bitma= p" to tell what options are there, the parsing will decode option by option= and will read the fields. In that way any combination of fields is support= ed. would that work? X On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne > wrote: Xavi, Fantastic! I believe PDR for each link might be too long to fit in a packet. While the= mote will most likely keep that information, we could move that to the que= ry flow, i.e. it is available to the PCE on-demand. Would you agree that the number of links in a bundle belongs to the neighbo= r? Of maybe we want a "bundle" category? In queuing, it might be interesting to see the age of the different packets= , to be able to monitor latency. About LQI, there is no general consensus among vendors on what the definiti= on is, or how exactly it is calculated. I would make it optional. Also, it might be good to be able to add arbitrary fields to each category:= neighbor, queue, time source neighbor. Finally, do you envision a generic mechanism whereby the PCE can turn field= s on/off, or triggered independently? Thomas On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen > wrote: Hi Thomas, Diego, I agree that LQI should be there as well. I update here the list with Thoma= s suggestions. For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -AVG LQI in a running window -Latest LQI -Num TX packets (option in case there is communication with that neighbor) -Num ACK packets (option in case there is communication with that neighbor= ) -Num RX packets (option in case there is communication with that neighbor) -Last ASN when it heart about that neighbor Other fields -Num links in the Schedule to that neighbor -For each link PDR -For each Queue: - Avg Queue length in a running window - Max Queue length in a running window (peak) - Current Queue length (?) -Time source parent -ID -Avg clock drift (correction done) in a running window -Latest clock correction -Parent changes (counter of how many times I changed my time source par= ent) -Option Flag (weather there are optional TLV fields) +(TLV objects)* Hope this makes sense. cheers! Xavi On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne > wrote: [renamed thread] Xavi, A few thoughts: - the counters (numTx, etc) will only be present for neighbors the node has= communicate with, so they should be optional in the packet. - you have focused on the topological information (which I think is the rig= ht one). It might be useful to gather other data related to synchronization= or queuing. - I couldn't agree more with your suggestion to make it extensible. This do= es mean that we will need to state somewhere that a device need to ignore s= ilently fields it does not understand. Thomas On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen > wrote: Hello, I guess that flows are getting defined and I started to think on the= contents of the messages on that flows. Not sure if this is the right time= or I am going way far.. According to the previous discussion I assume that the five flows are: ME-6TOP - Query Flow ME-6TOP - Action Flow 6TOP - ME - Report Flow 6TOP - ME - Event Flow 6TOP - ME - Request BW Flow I'd like to start defining the content of the messages in the Report Flow: The Report Flow: has to deal with the information that a node knows and has= to be sent to the ME so the ME can compute the schedule among others. Here= I list the information that we can know in a mote and can be used at the = ME to compute the schedule (complete please if I miss something) For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -Num TX packets -Num ACK packets -Num RX packets -Last ASN when it heart about that neighbor Other fields -Num links in the Schedule to that neighbor -For each link PDR Then we need to have some TLV like objects that can be used for ad-hoc/naiv= e/other extensions of the reporting process. In that way we don't constrain= t the implementation of the scheduling alg. to that information. what do you think? X On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang > wrote: Hi all, In this thread, we will continue the discussion about Confirmation message.= Here is some background information. Context: e.g. - node sends a report and want to know if the report is accepted., - ME sends a action request and want to know if/when the action taken. Options: (1) Nothing (2) Rely on transport mechanism (e.g. confirmable CoAP message) (3) App-level ACK type (4) Use different flow (i.e. action flow) IMHO, different control flow may have different requirement for confirmatio= n message. (1) Action Flow, needs a App-level confirmation, like Succ/Fail (2) Query Flow, automatically has the confirmation, i.e. the message pa= cket corresponding to a specific query. (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer opt= ion (1) and (3), i.e. the confirmation message is an option, but if a confi= rmation message is needed, it should be App-level Ack, instead of transport= layer confirmation, which will give 6top more flexibility. What do you think? Thanks Qin _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47EXMBX23adutwent_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Thomas,

I agree with you that "source route failed&q= uot; and "graph route failed" are out of scope of 6TiSCH.

Regarding to you question about the per-channel r= eport, I think they are based on each radio channel supported by the specification (channel 11-26 in 2.4GHz in IEEE 802.15.4), not chann= el offset. And a channel report generated for all neighbor.

Regarding to your first question, let me now = explain more. I think both of these standard provide a mechanisms to make i= t possible for System/Network Manager to also read (pull) desired attributes (But not all the feature in 6TiSCH). For example in Wir= elessHART [1], by “Report Neighbor Health List” request, the ne= twork manager might mention the number of neighbors to be read in “Nu= mber of Neighbor entries read” field..

I think, ISA100.11a provides more mechanisms = for System manager to get the desired attributes from the field devices. An= d the first two features that you mentioned might also be supported by ISA100.11a.

In ISA100.11a, three mechanisms are provided = for reporting diagnostic information contained in dlmo.NeighborDiag (descri= bed in section 1 later) and dlmo.ChannelDiag (described in Section 2 later):

  1. The health reports concentrator object (HRCO)= , can be configured to report any attribute in the DL on a periodic basis. dlmo.NeighborDiag entries (shown in Table 2Table = 5) can be reported through that mechan= ism. Through the HRCO, the system manager can configure the device to report Ne= ighborDiag periodically, such as every 30 minutes. Following each such repo= rt, on a per-entry basis, NeighborDiag counts shall be reset to zero. Level= s shall use the current value as a starting point for the next period [2].
  2. Diagnostic information can be retrieved at an= y time by the system manager, by reading the applicable attributes. The sys= tem manager can read (poll) NeighborDiag as a read-only attribute on a per-entry basis. As in an HRCO report, counts shall = be reset to zero when read [2].
  3. Diagnostic information can be reported by the= DL on an exception basis, through the DL_Connectivity alert (Described in = section 3(a)). The DL can additionally be configured, through the dlmo.Aler= tPolicy attribute (shown in Table 6), to report NeighborDiag information when diagnostic values exceed a threshold. Only the row triggering the alert is reported. No values are re= set [2].

 

In ISA100.11a, the system manager establishes= a DL communication relationship between a device and its neighbor by addin= g an entry to the device’s dlmo.Neighbor attribute (see Table 1). Each such entry specifies a level of diagnostics to be collected, = through the field dlmo.Neighbor[].DiagLevel. For each neighbor, diagnostics may be= collected at a baseline level, or a detailed level including clock diagnos= tics [2]. This levels are described in Section 1.

Table 1. dlmo.Neighbor fi= elds [2]

Field n= ame

 Field e= ncoding

* Index (1= 6-bit address of neighbor)

ExtDlUint = (used as an index)

EUI64 (EUI= -64 identifier of the neighbor)

Type: Unsi= gned64

…

…

DiagLev= el (selection of neighbor diagnostics to collect)

Type: Unsigned2

Bit0 =3D 1 Collect link diagnostics

Bit1 =3D 1= Collect clock diagnostics

…

…

 

When the dlmo.Neighbor[].DiagLevel field is s= et for a particular neighbor, the DL shall create corresponding entries in = the read-only attribute dlmo.NeighborDiag. NeighborDiag values are accumulated from the time that the dlmo.NeighborDiag entry is c= reated [2].

1. &= nbsp;     dlmo.NeighborDiag:

dlmo.NeighborDiag is an indexed OctetString colle= ction that contains diagnostics for a set of neighbors. The attribute is read-only, with rows created as needed by the DL [2].

NeighborDiag entries are instantiated by the = system manager, by setting dlmo.Neighbor[].DiagLevel bits to non-zero value= s. Iff (if and only if) Bit0=3D1, then summary diagnostics shall be collected for the neighbor, consolidated across all channels. Iff= Bit1=3D1, then detailed clock diagnostics shall be collected for the neigh= bor, consolidated across all radio channels [2].

Table 2. dlmo.NeighborDia= g fields [2]

Field name=

Field enco= ding

* Index

Type: ExtD= lUint (neighbor address, used as an index)

Summary=

Type: Octe= tString (see Table 3)

ClockDe= tail

Type: Octe= tString (see Table 4)

 

Table 3. Diagnostic Summa= ry OctetString fields [2]

Field name=

Field enco= ding

RSSI (leve= l)

Type: Inte= ger8

RSQI (leve= l)

Type: Unsi= gned8

RxDPDU (co= unt)

Type: ExtD= lUint

TxSuccessf= ul (count)

Type: ExtD= lUint

TxFailed (= count)

Type: ExtD= lUint

TxCCA_Back= off (count)

Type: ExtD= lUint

TxNACK (co= unt)

Type: ExtD= lUint

ClockSigma= (level)

Type: Inte= ger16

 

Table 4. Diagnostic Clock= Detail OctetString fields [2]

Field name=

Field enco= ding

ClockBias = (level, signed)

Type: Inte= ger16

ClockCount= (count)

Type: ExtD= lUint

ClockTimeo= ut (count)

Type: ExtD= lUint

ClockOutli= ers (count)

Type: ExtD= lUint

 

2. &nbs= p;     dlmo.ChannelDiag:

dlmo.ChannelDiag is a read-only dynamic attri= bute that reports DPDU transmit failure rates on each radio channel support= ed by the specification. This enables the system manager to be aware of consistent connectivity problems on a per-channel basis, as= a diagnostic for spectrum management in a subnet [2].

Two diagnostics are reported for each channel= , each indicating a different type of failure. indicates the percentage of time that unicast DPDU transmissions on channe= l N did not receive an ACK or a NACK. (Percentage of time transmissions on channel 0 did not receive an ACK)

Type: Inte= ger8

(Percentage of time transmissions on channel 0 aborted due to CCA)

Type: Inte= ger8

…

 = ;

(Percentage of time transmissions on channel 15 did not receive an ACK)

Type: Inte= ger8

(Percentage of time transmissions on channel 15 aborted due to CCA)

Type: Inte= ger8

 

3. &= nbsp;     Data link layer alerts

  1. DL_Connectivity alert

DL performance diagnostics are accumulated in= the attributes dlmo.NeighborDiag for per-neighbor diagnostics, and dlmo.ChannelDiag for per-channel diagnostics. Normally the system manager configures the HRCO to report th= ese diagnostics periodically, and the DL automatically resets the diagnosti= c counters whenever these attributes are so reported. Between such reports, diagnostics may indicate a problem = that needs to be reported to the system manager immediately. The DL_Connect= ivity alert provides the mechanism for the DL to report such issues, and th= e dlmo.AlertPolicy attribute enables the system manager to set thresholds for such reporting [2].

The attribute dlmo.AlertPolicy enables/disabl= es the DL_Connectivity alert and provides thresholds to control whether ale= rts are reported. dlmo.AlertPolicy is an OctetString containing fields as shown in Table 6 [2].

Table 6. dlmo.AlertPolicy= fields

Field name

Field scalar type

Descriptor (Enables or disabled the DL_Connectivity alert.)

Type Alert report descriptor

NeiMinUnicast (Minimum number of unicas= t transactions needed for a neighbor report.)

Type: ExtDlUint

NeiErrThresh (Report neighbor diagnosti= c if the percentage error rate reaches this threshold )

Type: Unsigned8

ChanMinUnicast (Minimum number of unica= st transactions on a channel needed as a pre-condition for triggering an al= ert.)

Type: ExtDlUint

NoAckThresh (Report ChannelDiag if a NoAck value is greater than this thr= eshold)

Type: Unsigned8

CCABackoffThresh (Report ChannelDiag if= a CCABackoff value is greater than this threshold)

Type: Unsigned8

 

  1. NeighborDiscovery alert=

The NeighborDiscovery alert provides a mechan= ism for the DL to report the contents of the OctetString in dlmo.Candidates= attribute (see Table 7).

The neighbors in the dlmo.Neighbor attribute = are set by the system manager, not by the device itself. The DL autonomousl= y builds a list of candidate neighbors in the dlmo.Candidates attribute. This list is then forwarded to the system manager. The system m= anager considers the radio connectivity that is reported in dlmo.Candidates= , but may also consider other criteria such as resource constraints, histor= ical performance, or subnet topology [2].

Table 7. dlmo.Candidates = OctetString fields

Field name

 Field encoding

N (count of discovered neighbors)<= /o:p>

Type: Unsigned8

Neighbor1 (16-bit address of first cand= idate)

Type: ExtDlUint

RSSI1 (radio signal quality of first ca= ndidate)

Type: Integer8

RSQI1 (radio signal quality of first ca= ndidate)

Type: Unsigned8

etc…

 

NeighborN (16-bit address of Nth candid= ate)

Type: ExtDlUint

RSSIN (radio signal quality of Nth cand= idate)

Type: Integer8

RSQIN (radio signal quality of Nth cand= idate)

Type: Unsigned8

 

<= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif"">References

1.        = ;    IEC 62591: Industrial Communication Networks - Wireless= Communication Network and Communication Profiles - WirelessHART.

 

2.        = ;    IEC 62734: Industrial communication networks - Fieldbus= specifications - Wireless systems for industrial automation: process control and related applications - ISA100.1= 1a.

 <= /p>

 <= /p>

From: 6tsch-bo= unces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
Sent: Wednesday, September 11, 2013 8:54 PM
To: Thomas Watteyne
Cc: 6TSCH
Subject: Re: [6tsch] report flow contents

 

Hi Thomas,

my 5 cents.

I agree on adding NAC= K information and timing differences with other than time source parent nei= ghbors. I will add to the wiki :-)

As regards to the dif= ferences of what we do at 6TiSCH and WHart or ISA100.11a, our proposal is m= ore flexible and has less cohesion with a cost of increased complexity (e.g= configurable data and reporting period). We have to analyse carefully what are the implications in terms of protoco= l complexity and implementation of that mechanism versus how often they wou= ld be used. Could we maybe define some "templates" or default con= figurations so using the 6TiSCH can be done without configuration overhead? Then configuration can be used for those t= hat are really interested on tuning their system.

just thoughts..
X

 

 

On Wed, Sep 11, 2013 at 9:58 AM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

Pouria,

 

Wonderful list.

 

Your document clearly highlights that (1) the "= report" flows both in WirelessHART and ISA100.11a are strictly periodi= c and (1) they have a fixed format. From what we have discussed so far, the= solutions we are developing is different in the following ways:

  • 6TiSCH offers a mechanism allowing the PCE to configure what data it want t= o receive, and configure the trigger for a node to generate from data.=
  • 6TiSCH offers a mechanism allowing the PCE to query the data, on top o= f having the nodes push the information
  • In 6TiSCH, the format of the payload is not fixed. In particular, it is pos= sible to add application-specific fields, allowing for extensions.
  • In 6TiSCH, the transport (CoAP?) and formatting (CBOR?) are IETF-frien= dly and integrate well in the IPv6 stack and associated mechanisms

Did I get that right?

 

A couple of questions:

  • the WirelessHART "alarms" correspond to a 6TiSCH "events&quo= t;. Yet, I suppose that a "source route failed" and "graph r= oute failed" are out of scope of 6TiSCH, but rather part of RPL. I wou= ld expect those to the ICMPv6 messages. Thoughts?
  • About the per-channel report, I assume this is "per frequency", r= ight? Is a channel report generated for each neighbor?
  • When comparing your list to Xavi's https://bi= tbucket.org/6tsch/meetings/wiki/report_flow_contents:
      • we might want to add a "numNACK" counter to the neighbor informat= ion
      • we might want to keep timing statistics for all neighbors, not just time so= urce parents. That is, when I receive a packet from a neighbor which is not= my time source neighbor, I do not change my clock, but I still know the ti= ming error.

    Thomas

 

On Wed, Sep 11, 2013 at 7:18 AM, <P.Zand@utwente.nl> wrote:

Dear All,

In the following, I listed the performance me= trics reported to the Network/System Manager in WirelessHART and ISA100.11a= .

Some reports still need be added, for example= the path failure alerts in ISA100.11a.

Pouria

 

WirelessHART performance metrics

In WirelessHART[1] network the statistics and events are reported to = the Network Manager (act like PCE in 6TiSCH) through the following commands:

  1. Report “Device Health”

This report is sent periodically toward the N= etwork Manager. The report summaries the communication statistics of a devi= ce.

Byte

Format

Description

0-1

Unsigned-16

Number of packets generated by this device since last repor= t

2-3

Unsigned-16

Number of packets terminated by this device since last repo= rt

4

Unsigned-8

Number of Data-Link Layer MAC MIC failures detected<= o:p>

5

Unsigned-8

Number of Network Layer (Session) MIC failures detected

6

Enum-8

Power Status

7

Unsigned-8

Number of CRC Errors detected

 

  1. Report “Neighbor Health List”

This report is sent periodically toward the N= etwork Manager. The report includes the statistics of linked neighbors.

Byte

Format

Description

0

Unsigned-8

Neighbor table index

1

Unsigned-8

Number of Neighbor entries read

2

Unsigned-8

Total number of neighbors

3-4

Unsigned-16

Nickname of neighbor

5

Bit-8

Neighbor Flags

6

Signed-8

Mean RSL (Receive Signal Level in dBm) since last report

7-8

Unsigned-16

Number of Packets transmitted to this neighbor<= /o:p>

9-10

Unsigned-16

Number of Packets received from this neighbor

11-12

Unsigned-16

Packets received from this neighbor

13-…

 

Number of entries based on response byte 1

 

  1. Report “Neighbor Signal Levels”

This report is sent periodically toward the N= etwork Manager. The report includes the statistics of discovered (but not l= inked) neighbors. These neighbors might be discovered when a device has heard the neighbor communication in the discovery links.= A device that wish to join a network, send a join request to the Network m= anager, including this report.

Byte

Format

Description

0

Unsigned-8

Neighbor table index

1

Unsigned-8

Number of Neighbor entries read

2

Unsigned-8

Total number of neighbors

3-4

Unsigned-16

Nickname of neighbor

5

Signed-8

RSL of neighbor in dB

6-8

 

Repeats (as needed) based on response byte 1

 

  1. Alarm “Path Down”

The alarm is sent upon detecting a path failu= re.

Byte

Format

Description

0-1

Unsigned-16

Nickname of neighbor to which path failure was detected

 

  1. Alarm "Source Route Failed"<= o:p>

This alarm is sent upon detecting a source ro= ute failure.

Byte

Format

Description

0-1

Unsigned-16

Nickname of unreachable neighbor in the source route=

2-5

Unsigned-32

Network-Layer MIC (i.e., the MIC generated using the sessio= n key) from the NPDU that failed routing

 

  1. Alarm "Graph Route Failed"

This alarm is sent upon detecting a graph rou= te failure.

Byte

Format

Description

0-1

Unsigned-16

Graph Id of the failed route

 


 

ISA100.11a performance metric

In ISA100.11a[2], the L2 performance metrics are reported to the Syst= em Manager (act like PCE in 6TiSCH) and can be classified into (1) DL_Connectivity alert and (2) NeighborDiscovery alert.

  1. DL_Connectivity alert
    2. <= /ol>

    The DL_connectivity alert can be classified i= nto (a) Per-neighbor reports and (b) Per-channel reports.

      • Per-neighbor report<= /li>

    Per-neighbor reports are the  performanc= e metrics about the neighbors connection and are reported to the System Man= ager. These statistics are accumulated in the “dlmo.NeighborDiag̶= 1; attribute, for each neighbor. This report is similar to “Neighbor He= alth List” report in WirelessHART.

    Each node in ISA100.11a might be asked to rep= ort the following statistics about its neighbor:

     

    Octets

    Format

    Description

    1

    Signed-8

    RSSI (level)

    1

    Unsigned-8

    RSQI (level)

    1-2

    ExtDLUint

    RxDPDU(count): Number of valid Packets received from this n= eighbor

    1-2

    ExtDLUint

    TxSuccessful (count):Count of successful unicast transmissi= ons to the neighbor

    1-2

    ExtDLUint

    TxFailed (count): Number of unicast transmission, without&n= bsp; getting any ACK or NACK

    1-2

    ExtDLUint

    TxCCA_Backoff (count): Number of unicast transmission abort= ed due to CCA

    1-2

    ExtDLUint

    TxNACK (count): Number of NACKs received<= /p>

    2

    Signed-16

    ClockSigma (level): A rough estimate of standard deviation = of clock corrections

     

      • Per-channel report

    In addition, in ISA100.11a, several performan= ce metrics are reported based on channel for all neighbors to the System Ma= nager. These statistics are accumulated in the “dlmo.ChannelDiag̶= 1; attribute. This report is similar to “Device Health” report in= WirelessHART.

    Byte

    Format

    Description

    0-2

    Unsigned-16

    Count (Number of attempted unicast transmissions for all ch= annels)

    3

    Integer-8

    (Percentage of time transm= issions on channel 0 did not receive an ACK)

    4

    Integer-8

    (Percentage of time transm= issions on channel 0 aborted due to CCA)

    …

     

     

    33

    Integer-8

    (Percentage of time transm= issions on channel 15 did not receive an ACK)

    34

    Integer-8

    (Percentage of time transm= issions on channel 15 aborted due to CCA)

     

    1. NeighborDiscovery alert

    In ISA100.11a, each node sends a report, incl= uding a list of candidate (overheard) neighbors, to the System Manager to m= ake a potential new routing decisions. The “dlmo.Candidates” attributed is used to store those information in each node in the L2. This= report is similar to the “Neighbor Signal Levels” report in Wi= relessHART.

    Octets

    Format

    Description

    1

    Unsigned-8

    N (count of discovered neighbors)

    0-2

    ExtDlUint

    address<= /p>

    0-1

    Signed-8

    0-1

    Unsigned-8

    …

     

     

    0-2

    ExtDlUint

    address<= /p>

    0-1

    Signed-8

    0-1

    Unsigned-8

     

     

    References

    1.       IEC 62591: Industrial Communication Ne= tworks - Wireless Communication Network and Communication Profiles - Wirele= ssHART.

     

    2.       IEC 62734: Industrial communication ne= tworks - Fieldbus specifications - Wireless systems for industrial automati= on: process control and related applications - ISA100.11a.

     

     

     

    From: 6tsch-bounces@i= etf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Thomas Watteyne
    Sent: Saturday, September 07, 2013 7:43 PM
    To: Xavi Vilajosana
    Cc: Pascal Thubert (pthubert); 6tsch@ietf.org
    Subject: Re: [6tsch] report flow contents

     

    Xavi,

    Great, thanks!

    Thomas

     

    On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen <xvilajosana@eecs.b= erkeley.edu> wrote:

    Hi,
    I created the scratchpad section in the wiki to keep ideas
    https://bitbucket.org/6tsch/meetings/wiki/Home


    and added the flow content information here.

    https://bitbucket.org/6tsch/meetings/wiki/report_flow_con= tents

    have a nice weekend!

    X

     

    On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen <xvilajosana@eec= s.berkeley.edu> wrote:

    Hi Pascal, it is a good idea!<= /p>

    I will collect that information and as Thomas put it at the wiki so we d= o not lose it.

    :-)

    X

     

    On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) <pthubert@cisco.com> wr= ote:

    Hello Xavi:

     

    At the call I mentioned we could use info on = tracks and cells as well, probably on demand from the PCE.

    For instance, the PCE could observe energy le= vels over some cells for  a while to make sure they are clean.<= o:p>

     

    What do you think?

    Pascal

     

    From: 6tsch-bounces@i= etf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
    Sent: vendredi 6 septembre 2013 01:17
    To: Thomas Watteyne
    Cc: 6tsch@ietf.o= rg
    Subject: Re: [6tsch] report flow contents

     

    agreed!

    So the fields become:

     

     

    For each known neighbor:

     -ID

     -AVG RSSI in a running window

     -Latest RSSI

     -AVG LQI in a running window [optional]

     -Latest LQI [optional]

     -Num TX packets (option in case there is communication w= ith that neighbor)

     -Num ACK packets (option in case there is communication = with that neighbor)

     -Num RX packets (option in case there is communication w= ith that neighbor)

     -Last ASN when it heart about that neighbor =

     -Bundle: Num links in the Schedule to that neighbor

          -PDR per link [Optional -- or maybe best = and worst PDR only]

     

     -Option Flag (weather there are optional T= LV fields on that category)

       +(TLV objects)* 

     

     -For each Queue:

        - Avg Queue length in a running window

        - Max Queue length in a running window (peak)

        - Current Queue length (?)

        - ASN of the oldest packet in the QUEUE?<= o:p>

        -Option Flag (weather there are optional TLV fie= lds on that category)

            +(TLV objects)* 

     

    -Time source parent

        -ID

        -Avg clock drift (correction done) in a running = window

        -Latest clock correction

        -Parent changes (counter of how many times I cha= nged my time source parent)

        -Option Flag (weather there are optional TLV fie= lds on that category)

        +(TLV objects)* 

     

    -Option Flag (weather there are optional TLV fields in other c= ategories)

       +(TLV objects)* 

     

    as regards to this:

     

    "Finally, do you envision a generic mechanism whereby the= PCE can turn fields on/off, or triggered independently?"<= /o:p>

     

    I s= ee it as CoAP Options, where a set of bytes can be used as "clever bit= map" to tell what options are there, the parsing will decode option by= option and will read the fields. In that way any combination of fields is supported.

     

    wou= ld that work?

    X

     

    On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <watteyne@eecs.berkeley.edu&= gt; wrote:

    Xavi,

     

    Fantastic!

     

    I believe PDR for each link might be too long to fit in a packet. While = the mote will most likely keep that information, we could move that to the = query flow, i.e. it is available to the PCE on-demand.

     

    Would you agree that the number of links in a bundle belongs to the neig= hbor? Of maybe we want a "bundle" category?

     

    In queuing, it might be interesting to see the age of the different pack= ets, to be able to monitor latency.

     

    About LQI, there is no general consensus among vendors on what the defin= ition is, or how exactly it is calculated. I would make it optional.

     

    Also, it might be good to be able to add arbitrary fields to each catego= ry: neighbor, queue, time source neighbor.

     

    Finally, do you envision a generic mechanism whereby the PCE can turn fi= elds on/off, or triggered independently?

     

    Thomas

     

    On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen <xvilajosana@eec= s.berkeley.edu> wrote:

    Hi Thomas, Diego,

     

    I agree that LQI should be there as well. I update here the list with Th= omas suggestions. 

     

    For each known neighbor:

     -ID

     -AVG RSSI in a running window

     -Latest RSSI

     -AVG LQI in a running window

     -Latest LQI

     -Num TX packets (option in case there is communication w= ith that neighbor)

     -Num ACK packets (option in case there is communication = with that neighbor)

     -Num RX packets (option in case there is communication w= ith that neighbor)

     -Last ASN when it heart about that neighbor =

     

    Other fields

     -Num links in the Schedule to that neighbor<= /o:p>

        -For each link PDR

     -For each Queue:

        - Avg Queue length in a running window

        - Max Queue length in a running window (peak)

        - Current Queue length (?)

    -Time source parent

        -ID

        -Avg clock drift (correction done) in a running window

        -Latest clock correction

        -Parent changes (counter of how many times I changed my ti= me source parent)

     

    -Option Flag (weather there are optional TLV fields)

       +(TLV objects)* 

     

     

    Hope this makes sense.

    cheers!
    Xavi

     

    On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu= > wrote:

    [renamed thread]

     

    Xavi,

     

    A few thoughts:

    - the counters (numTx, etc) will only be present for neighbor= s the node has communicate with, so they should be optional in the packet.<= /span>

    - you have focused on the topological information (which I th= ink is the right one). It might be useful to gather other data related to s= ynchronization or queuing.

    - I couldn't agree more with your suggestion to make it exten= sible. This does mean that we will need to state somewhere that a device ne= ed to ignore silently fields it does not understand.

     

    Thomas

     

    On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen <xvilajosana@eec= s.berkeley.edu> wrote:

    Hello, I guess that flows are getting defined and I started to think on = the contents of the messages on that flows. Not sure if this is the right t= ime or I am going way far..

     

    According to the previous discussion I assume that the five flows are:

     

    ME-6TOP - Query Flow

    ME-6TOP - Action Flow

     

    6TOP - ME - Report Flow

    6TOP - ME - Event Flow

    6TOP - ME - Request BW Flow

     

    I'd like to start defining the content of the messages in the Report Flo= w:

     

    The Report Flow: has to deal with the information that a node knows and = has to be sent to the ME so the ME can compute the schedule among others. H= ere I list  the information that we can know in a mote and can be used= at the ME to compute the schedule (complete please if I miss something)

     

    For each known neighbor:

     -ID

     -AVG RSSI in a running window

     -Latest RSSI

     -Num TX packets

     -Num ACK packets

     -Num RX packets

     -Last ASN when it heart about that neighbor 

     

    Other fields

     -Num links in the Schedule to that neighbor

        -For each link PDR

     

     

    Then we need to have some TLV like objects that can be used for ad-hoc/n= aive/other extensions of the reporting process. In that way we don't constr= aint the implementation of the scheduling alg. to that information.

     

    what do you think?

    X

     

    On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu> wrote:

    Hi all,

     

    In this thread, we will continue the di= scussion about Confirmation message. Here is some background information.

     

    Context: e.g.

        - node sends a report and= want to know if the report is accepted., 

        - ME sends a action reque= st and want to know if/when the action taken.

    Options:

       (1) Nothing

       (2) Rely on transport mech= anism (e.g. confirmable CoAP message)

       (3) App-level ACK type

       (4) Use different flow (i.= e. action flow)

     

    IMHO, different control flow may have d= ifferent requirement for confirmation message.

        (1) Action Flow, needs a = App-level confirmation, like Succ/Fail

        (2) Query Flow, automatic= ally has the confirmation, i.e. the message packet corresponding to a speci= fic query.

        (3) Report Flow and Event= Flow, option (1)-(3) are OK, but I prefer option (1) and (3), i.e. the con= firmation message is an option, but if a confirmation message is needed, it= should be App-level Ack, instead of transport layer confirmation, which will give 6top more flexibility.

     

    What do you think?

     

    Thanks

    Qin

        

     

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tagged_above=-999 required=5 tests=[AWL=0.527, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id asvZL+z7BUZW for <6tsch@ietfa.amsl.com>; Wed, 11 Sep 2013 14:58:46 -0700 (PDT) Received: from mail-ie0-f170.google.com (mail-ie0-f170.google.com [209.85.223.170]) by ietfa.amsl.com (Postfix) with ESMTP id D8DA121F9B26 for <6tsch@ietf.org>; Wed, 11 Sep 2013 14:58:33 -0700 (PDT) Received: by mail-ie0-f170.google.com with SMTP id 17so12017303iea.29 for <6tsch@ietf.org>; Wed, 11 Sep 2013 14:58:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=haXcoNaJXO+CyrDiaV8yvoRg0OPZyWksHz0ZHK3LkdU=; b=dlzpjUKAj+qd9p5n+IbvlzUmlZhkE82lRwZMjRrEP5VY6UtJOtlOlOTt5tdBRK6zqO yH4Wd0AVEyZx3SQnqxisKaafDiECRQRGUcJXMPmPZXpZofDKGZEu9Tj96iPbMfBlWxns 6Jl6Po90Uajg6hSSWZ9P1sg4HlP7NZfuS6jb/qsaOZxN0j6HFpiBXKvuVfe31XlBFtZt 4Hgo7NgDGlriF8c+ndvj1SDSVK851ztZPBC9sObFCEbz2i64fbiVv7JxhwxVd9dfNTyv 4yBrijnvrKlBYJiX+29rU6cVe5f7l+Z0/UjAmN4XahLxiwb8etUbxZPTDNlgxBJXvxQb IoUQ== X-Gm-Message-State: ALoCoQmtEVDp4A8a9fpPvMsAZu5RX/KdrgcymcbzuaxcCGwCtAQ1EaSAONKSTDiCYiYNofkq0kNK MIME-Version: 1.0 X-Received: by 10.50.43.170 with SMTP id x10mr982722igl.45.1378936710030; Wed, 11 Sep 2013 14:58:30 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Wed, 11 Sep 2013 14:58:29 -0700 (PDT) In-Reply-To: References: Date: Thu, 12 Sep 2013 05:58:29 +0800 Message-ID: From: Qin Wang To: "Pascal Thubert (pthubert)" Content-Type: multipart/alternative; boundary=089e01176cadc713bd04e622b8ae Cc: Thomas Watteyne , 6TSCH <6tsch@ietf.org>, "xvilajosana@eecs.berkeley.edu" Subject: Re: [6tsch] Zero Objective Function discussion X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2013 21:59:00 -0000 --089e01176cadc713bd04e622b8ae Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Pascal, I agree with your calculation. But, I have a small question. If you calculate with rank_increase=3D(2*xmit/ack)*256, instead of rank_increase=3D(512*xmit/ack), then, you will get the result as follows. r(1)=3Dr(0)+2.66*256 =3D 2.66*256 =3D> DAGRank(rank) =3D 2***= * r(2)=3Dr(1)+2.66*256=3D 5.32*256 =3D> DAGRank(rank) =3D 5**= ** r(3)=3Dr(2)+2.66*256=3D7.98*256 =3D> DAGRank(rank) =3D 7** r(4)=3Dr(3)+2.66*256=3D10.64*256 =3D> DAGRank(rank) =3D 10**= ** r(5)=3Dr(4)+2.66*256=3D13.30*256 =3D> DAGRank(rank) =3D 13 You can see r(3) is different from that in your calculation. Obviously, the difference comes from different implementation. In another word, following same OF, different implementation may lead to different Rank value. Then, my question is if it is Ok while the motes from different vendors work together in a DAG. Please point out if I'm wrong. Thanks Qin On Wed, Sep 11, 2013 at 3:08 AM, Pascal Thubert (pthubert) < pthubert@cisco.com> wrote: > Hello Xavi:**** > > ** ** > > Great!**** > > ** ** > > I=92d add the following:**** > > ** ** > > RFC 6550 3.5.1 . Ran= k Comparison (DAGRank())has:**** > > =93**** > > When an Objective Function computes Rank, the Objective Function**** > > operates on the entire (i.e., 16-bit) Rank quantity. When Rank is**** > > compared, e.g., for determination of parent relationships or loop**** > > detection, the integer portion of the Rank is to be used. The**** > > integer portion of the Rank is computed by the DAGRank() macro as**** > > follows, where floor(x) is the function that evaluates to the**** > > greatest integer less than or equal to x:**** > > ** ** > > DAGRank(rank) =3D floor(rank/MinHopRankIncrease)**** > > ** ** > > For example, if a 16-bit Rank quantity is decimal 27, and the**** > > MinHopRankIncrease is decimal 16, then DAGRank(27) =3D floor(1.6875) = =3D**** > > 1. The integer part of the Rank is 1 and the fractional part is**** > > 11/16.**** > > ** ** > > =93**** > > DAGRank(rank) is what we expect to place in the Flow label and the join > priority.**** > > In our case:**** > > ** ** > > r(1)=3Dr(0)+rank_increase =3D 0+683 =3D> DAGRank(rank) =3D = 2**** > > r(2)=3Dr(1)+683=3D1366 =3D> > DAGRank(rank) =3D 5**** > > r(3)=3Dr(2)+683=3D2049 =3D> > DAGRank(rank) =3D 8**** > > r(4)=3Dr(3)+683=3D2732 =3D> > DAGRank(rank) =3D 10**** > > r(5)=3Dr(4)+683=3D3415 =3D> > DAGRank(rank) =3D 13**** > > ** ** > > We see that the DAGRank() always increases at least by one. This is the > desired property so as to ensure that we can detect loop with just one > octet in the flow label.**** > > Note that the real 2 octets Rank does not lose the rounding info since th= e > DIP always passes 2 octets.**** > > ** ** > > Cheers,**** > > ** ** > > Pascal**** > > ** ** > > *From:* Xavier Vilajosana Guillen [mailto:xvilajosana@eecs.berkeley.edu] > *Sent:* mardi 10 septembre 2013 19:53 > *To:* Pascal Thubert (pthubert) > *Cc:* Thomas Watteyne; 6TSCH > *Subject:* Re: [6tsch] Zero Objective Function discussion**** > > ** ** > > Hi all, > > after some study I agree that we can use the RFC6552 in the minimal 6TiSC= H > configuration. I would like to call for approval or more input from other= s > before I consolidate the text in the draft. > > I put here an example following Pascal suggestion: > > Given > > Rf =3D 1 > Sp =3D 2* ETX > Sr =3D 0 > minHopRankIncrease =3D 256 (default in RPL)**** > > ETX=3D(xmit/ack)**** > > ** ** > > r(n) =3D r(p) + rank_increase > rank_increase=3D (Rf*Sp + Sr) * minHopRankIncrease **** > > rank_increase=3D(512*xmit/ack) > > > if we take 5 hops (95 are supported) network and r(0)=3D0 and xmit=3D100 = and > ack=3D75 for all nodes > > r(1)=3Dr(0)+rank_increase =3D 0+683 with f=3D0 > r(2)=3Dr(1)+683=3D1366 with f=3D1 > r(3)=3Dr(2)+683=3D2049 with f=3D2 > r(4)=3Dr(3)+683=3D2732 with f=3D2 > r(5)=3Dr(4)+683=3D3415 with f=3D3 > ... > etc... > > so f is monotonically increasing and the rank function enables more than > enough hops.**** > > Please provide feedback.**** > > cheers! > Xavi**** > > **** > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --089e01176cadc713bd04e622b8ae Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hi Pascal,

I agree with your calculatio= n. But, I have a small question.

If you calculate = with=A0rank_inc= rease=3D(2*xmit/ack)*256, instead of=A0rank_increase=3D(512*xmit/ack), then, you wi= ll get the result as follows.

r(1)=3Dr(0)+2.66*256 =3D 2.66*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =3D> DAGRank(rank) =3D 2

r(2)=3Dr(1)+2.66*256=3D 5.32*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0=A0=A0 =3D>= DAGRank(rank) =3D 5

r(3)=3Dr(2)+2.66*256=3D7.98*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=3D>= DAGRank(rank) =3D 7

r(4)=3Dr(3)+2.66*256=3D10.64*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0=A0 =3D> DA= GRank(rank) =3D 10

r(5)=3Dr(4)+2.66*256=3D13.30*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0=A0=A0 =3D>= DAGRank(rank) =3D 13

You can see r(3) is different from that in your calculation. Obviously, th= e difference comes from different implementation. In another word, followin= g same OF, different implementation may lead to different Rank value. Then,= my question is if it is Ok while the motes from different vendors work tog= ether in a DAG.

Please point out if I'm wrong.

Thanks

Qin





=A0


On Wed, S= ep 11, 2013 at 3:08 AM, Pascal Thubert (pthubert) <pthubert@cisco.com= > wrote:

Hello Xavi:

=A0<= /p>

Great!

=A0<= /p>

I=92d add the following:<= u>

=A0<= /p> 

RFC 6550 =A0=A0=A03.5.1. Ran=
k Comparison (DAGRank())has:

=93<= /p> 

When an Objective Function computes Rank, the Objective Function
=A0=A0 operates on the entire (i.e., 16-bit) Rank quantity.=A0 When Ra=
nk is
=A0=A0 compared, e.g., for determination of parent relationships or lo=
op
=A0=A0 detection, the integer portion of the Rank is to be used.=A0 Th=
e
=A0=A0 integer portion of the Rank is computed by the DAGRank() macro =
as
=A0=A0 follows, where floor(x) is the function that evaluates to the
=A0=A0 greatest integer less than or equal to x:
=A0
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 DAGRank(rank) =3D floor(rank/M=
inHopRankIncrease)
=A0
=A0=A0 For example, if a 16-bit Rank quantity is decimal 27, and the
=A0=A0 MinHopRankIncrease is decimal 16, then DAGRank(27) =3D floor(1.=
6875) =3D
=A0=A0 1.=A0 The integer part of the Rank is 1 and the fractional part=
 is
=A0=A0 11/16.

=A0<= /p>

=93<= /p>

DAGRank(rank) is what we = expect to place in the Flow label and the join priority.

In our case:

=A0<= /p>

r(1)=3Dr(0)+rank_increase= =3D 0+683 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) = =3D 2

r(2)=3Dr(1)+683=3D1366=A0= =A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) =3D 5

r(3)=3Dr(2)+683=3D2049=A0= =A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) =3D 8<= u>

r(4)=3Dr(3)+683=3D2732 = =A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) =3D 10<= /u>

r(5)=3Dr(4)+683=3D3415=A0= =A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) =3D 13<= /u>

=A0<= /p>

We see that the DAGRank()= always increases at least by one. This is the desired property so as to en= sure that we can detect loop with just one octet in the flow label.

Note that the real 2 octe= ts Rank does not lose the rounding info since the DIP always passes 2 octet= s.

=A0<= /p>

Cheers,

=A0<= /p>

Pascal=

=A0<= /p>

From: Xavier V= ilajosana Guillen [mailto:xvilajosana@eecs.berkeley.edu]
Sent: mardi 10 septembre 2013 19:53
To: Pascal Thubert (pthubert)
Cc: Thomas Watteyne; 6TSCH
Subject: Re: [6tsch] Zero Objective Function discussion

=A0

Hi all,

after some study I agree that we can use the RFC6552 in the minimal 6TiSCH = configuration. I would like to call for approval or more input from others = before I consolidate the text in the draft.

I put here an example following Pascal suggestion:

Given

Rf =3D 1
Sp =3D 2* ETX
Sr =3D 0
minHopRankIncrease =3D 256 (default in RPL)

ETX=3D(xmit/ack)

=A0

r(n) =3D r(p) + rank_increase
rank_increase=3D (Rf*Sp + Sr) * minHopRankIncrease

rank_increase=3D(512*= xmit/ack)


if we take 5 hops (95 are supported) network and r(0)=3D0 and xmit=3D100 an= d ack=3D75 for all nodes

r(1)=3Dr(0)+rank_increase =3D 0+683 with f=3D0
r(2)=3Dr(1)+683=3D1366 with f=3D1
r(3)=3Dr(2)+683=3D2049 with f=3D2
r(4)=3Dr(3)+683=3D2732 with f=3D2
r(5)=3Dr(4)+683=3D3415 with f=3D3
...
etc...

so f is monotonically increasing and the rank function enables more than en= ough hops.

Please provide feedba= ck.

cheers!
Xavi

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--089e01176cadc713bd04e622b8ae-- From alfredo.grieco@gmail.com Thu Sep 12 00:34:19 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 82A0111E8190 for <6tsch@ietfa.amsl.com>; Thu, 12 Sep 2013 00:34:19 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0 X-Spam-Level: X-Spam-Status: No, score=x tagged_above=-999 required=5 tests=[] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YJBXFAu+FKiQ for <6tsch@ietfa.amsl.com>; Thu, 12 Sep 2013 00:34:19 -0700 (PDT) Received: from mail-ee0-x231.google.com (mail-ee0-x231.google.com [IPv6:2a00:1450:4013:c00::231]) by ietfa.amsl.com (Postfix) with ESMTP id 0C8E811E817D for <6tsch@ietf.org>; Thu, 12 Sep 2013 00:34:14 -0700 (PDT) Received: by mail-ee0-f49.google.com with SMTP id d41so5138890eek.36 for <6tsch@ietf.org>; Thu, 12 Sep 2013 00:34:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:references:in-reply-to:subject:date:message-id:mime-version :content-type:thread-index:content-language; bh=q78ozsRK9b5JAt4apY2vm76geczQFCA3WHj3zdHdVAM=; b=iszwI8ePdT6fXV8MAvzjedR5nHYcmC4qXdLhVLMxmo7UvcGADg9onreWF6pzqe0xG+ bdWxXYlhvc9j/jf6w0Ypr6en2VcykCkix1oLLDtoomBitOq3H36m7O0GApVmJVspEKcw C7BM1GRcPlAjtwX/gr2Ax7dUqcJ3JjO/qigT6YhDhuA/CeHt2wYPjVX6C28PQ07/B18g 0x17P5M0GHkPBBlbcRu2Ik+cf8ivNymkJwYg+wMx6jtRoqy9ljQYqXgx8A4NpT7xN1Pg iMlQa8mMk2SXDniqz5OWDwhEDkc1YvHOZnabZoG3lTdOfLT4m62Jh59sK9OJQteyG16V Oadg== X-Received: by 10.14.211.195 with SMTP id w43mr922669eeo.57.1378971254056; Thu, 12 Sep 2013 00:34:14 -0700 (PDT) Received: from GriecoPC (deecom23.poliba.it. [193.204.59.55]) by mx.google.com with ESMTPSA id y47sm3382498eew.12.1969.12.31.16.00.00 (version=TLSv1 cipher=RC4-SHA bits=128/128); Thu, 12 Sep 2013 00:34:10 -0700 (PDT) From: "Alfredo Grieco" To: , , , <6tsch@ietf.org> References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> In-Reply-To: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> Date: Thu, 12 Sep 2013 09:34:06 +0200 Message-ID: <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> MIME-Version: 1.0 Content-Type: multipart/related; boundary="----=_NextPart_000_0032_01CEAF9B.3AD592B0" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AQHOqmeRdn+u8+L3JUGYWl1pnrYuVpm3azMAgAA2pACAAAP1gIABFasAgAAfWwCAAGmlgIABKJyAgAYvvkCAAA0/AIAAIEEAgAA8AMCAALlWkA== Content-Language: en-us Subject: [6tsch] R: report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Sep 2013 07:34:19 -0000 This is a multi-part message in MIME format. ------=_NextPart_000_0032_01CEAF9B.3AD592B0 Content-Type: multipart/alternative; boundary="----=_NextPart_001_0033_01CEAF9B.3AD592B0" ------=_NextPart_001_0033_01CEAF9B.3AD592B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi All, Do you think is it feasible to add a bit/flag that allows some form of in-network processing ? This would be very useful to distributed/decentralized scheduling techniques and should not cost that much. Any thoughts is welcome. Cheers Alfredo Da: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] Per conto di P.Zand@utwente.nl Inviato: Wednesday, September 11, 2013 10:45 PM A: xvilajosana@eecs.berkeley.edu; watteyne@eecs.berkeley.edu Cc: 6tsch@ietf.org Oggetto: Re: [6tsch] report flow contents Thomas, I agree with you that "source route failed" and "graph route failed" are out of scope of 6TiSCH. Regarding to you question about the per-channel report, I think they are based on each radio channel supported by the specification (channel 11-26 in 2.4GHz in IEEE 802.15.4), not channel offset. And a channel report generated for all neighbor. Regarding to your first question, let me now explain more. I think both of these standard provide a mechanisms to make it possible for System/Network Manager to also read (pull) desired attributes (But not all the feature in 6TiSCH). For example in WirelessHART [1], by "Report Neighbor Health List" request, the network manager might mention the number of neighbors to be read in "Number of Neighbor entries read" field.. I think, ISA100.11a provides more mechanisms for System manager to get the desired attributes from the field devices. And the first two features that you mentioned might also be supported by ISA100.11a. In ISA100.11a, three mechanisms are provided for reporting diagnostic information contained in dlmo.NeighborDiag (described in section 1 later) and dlmo.ChannelDiag (described in Section 2 later): I. The health reports concentrator object (HRCO), can be configured to report any attribute in the DL on a periodic basis. dlmo.NeighborDiag entries (shown in Table 2) and dlmo.ChannelDiag (shown in Table 5) can be reported through that mechanism. Through the HRCO, the system manager can configure the device to report NeighborDiag periodically, such as every 30 minutes. Following each such report, on a per-entry basis, NeighborDiag counts shall be reset to zero. Levels shall use the current value as a starting point for the next period [2]. II. Diagnostic information can be retrieved at any time by the system manager, by reading the applicable attributes. The system manager can read (poll) NeighborDiag as a read-only attribute on a per-entry basis. As in an HRCO report, counts shall be reset to zero when read [2]. III. Diagnostic information can be reported by the DL on an exception basis, through the DL_Connectivity alert (Described in section 3(a)). The DL can additionally be configured, through the dlmo.AlertPolicy attribute (shown in Table 6), to report NeighborDiag information when diagnostic values exceed a threshold. Only the row triggering the alert is reported. No values are reset [2]. In ISA100.11a, the system manager establishes a DL communication relationship between a device and its neighbor by adding an entry to the device's dlmo.Neighbor attribute (see Table 1). Each such entry specifies a level of diagnostics to be collected, through the field dlmo.Neighbor[].DiagLevel. For each neighbor, diagnostics may be collected at a baseline level, or a detailed level including clock diagnostics [2]. This levels are described in Section 1. Table 1. dlmo.Neighbor fields [2] Field name Field encoding * Index (16-bit address of neighbor) ExtDlUint (used as an index) EUI64 (EUI-64 identifier of the neighbor) Type: Unsigned64 . . DiagLevel (selection of neighbor diagnostics to collect) Type: Unsigned2 Bit0 = 1 Collect link diagnostics Bit1 = 1 Collect clock diagnostics . . When the dlmo.Neighbor[].DiagLevel field is set for a particular neighbor, the DL shall create corresponding entries in the read-only attribute dlmo.NeighborDiag. NeighborDiag values are accumulated from the time that the dlmo.NeighborDiag entry is created [2]. 1. dlmo.NeighborDiag: dlmo.NeighborDiag is an indexed OctetString collection that contains diagnostics for a set of neighbors. The attribute is read-only, with rows created as needed by the DL [2]. NeighborDiag entries are instantiated by the system manager, by setting dlmo.Neighbor[].DiagLevel bits to non-zero values. Iff (if and only if) Bit0=1, then summary diagnostics shall be collected for the neighbor, consolidated across all channels. Iff Bit1=1, then detailed clock diagnostics shall be collected for the neighbor, consolidated across all radio channels [2]. Table 2. dlmo.NeighborDiag fields [2] Field name Field encoding * Index Type: ExtDlUint (neighbor address, used as an index) Summary Type: OctetString (see Table 3) ClockDetail Type: OctetString (see Table 4) Table 3. Diagnostic Summary OctetString fields [2] Field name Field encoding RSSI (level) Type: Integer8 RSQI (level) Type: Unsigned8 RxDPDU (count) Type: ExtDlUint TxSuccessful (count) Type: ExtDlUint TxFailed (count) Type: ExtDlUint TxCCA_Backoff (count) Type: ExtDlUint TxNACK (count) Type: ExtDlUint ClockSigma (level) Type: Integer16 Table 4. Diagnostic ClockDetail OctetString fields [2] Field name Field encoding ClockBias (level, signed) Type: Integer16 ClockCount (count) Type: ExtDlUint ClockTimeout (count) Type: ExtDlUint ClockOutliers (count) Type: ExtDlUint 2. dlmo.ChannelDiag: dlmo.ChannelDiag is a read-only dynamic attribute that reports DPDU transmit failure rates on each radio channel supported by the specification. This enables the system manager to be aware of consistent connectivity problems on a per-channel basis, as a diagnostic for spectrum management in a subnet [2]. Two diagnostics are reported for each channel, each indicating a different type of failure. indicates the percentage of time that unicast DPDU transmissions on channel N did not receive an ACK or a NACK. indicates the percentage of time that unicast DPDU transmissions on channel N were aborted due to CCA. [2] Table 5. dlmo.ChannelDiag fields Field name Field encoding Count (Number of attempted unicast transmissions for all channels) Type:Unsigned16 (Percentage of time transmissions on channel 0 did not receive an ACK) Type: Integer8 (Percentage of time transmissions on channel 0 aborted due to CCA) Type: Integer8 . (Percentage of time transmissions on channel 15 did not receive an ACK) Type: Integer8 (Percentage of time transmissions on channel 15 aborted due to CCA) Type: Integer8 3. Data link layer alerts a. DL_Connectivity alert DL performance diagnostics are accumulated in the attributes dlmo.NeighborDiag for per-neighbor diagnostics, and dlmo.ChannelDiag for per-channel diagnostics. Normally the system manager configures the HRCO to report these diagnostics periodically, and the DL automatically resets the diagnostic counters whenever these attributes are so reported. Between such reports, diagnostics may indicate a problem that needs to be reported to the system manager immediately. The DL_Connectivity alert provides the mechanism for the DL to report such issues, and the dlmo.AlertPolicy attribute enables the system manager to set thresholds for such reporting [2]. The attribute dlmo.AlertPolicy enables/disables the DL_Connectivity alert and provides thresholds to control whether alerts are reported. dlmo.AlertPolicy is an OctetString containing fields as shown in Table 6 [2]. Table 6. dlmo.AlertPolicy fields Field name Field scalar type Descriptor (Enables or disabled the DL_Connectivity alert.) Type Alert report descriptor NeiMinUnicast (Minimum number of unicast transactions needed for a neighbor report.) Type: ExtDlUint NeiErrThresh (Report neighbor diagnostic if the percentage error rate reaches this threshold ) Type: Unsigned8 ChanMinUnicast (Minimum number of unicast transactions on a channel needed as a pre-condition for triggering an alert.) Type: ExtDlUint NoAckThresh (Report ChannelDiag if a NoAck value is greater than this threshold) Type: Unsigned8 CCABackoffThresh (Report ChannelDiag if a CCABackoff value is greater than this threshold) Type: Unsigned8 b. NeighborDiscovery alert The NeighborDiscovery alert provides a mechanism for the DL to report the contents of the OctetString in dlmo.Candidates attribute (see Table 7). The neighbors in the dlmo.Neighbor attribute are set by the system manager, not by the device itself. The DL autonomously builds a list of candidate neighbors in the dlmo.Candidates attribute. This list is then forwarded to the system manager. The system manager considers the radio connectivity that is reported in dlmo.Candidates, but may also consider other criteria such as resource constraints, historical performance, or subnet topology [2]. Table 7. dlmo.Candidates OctetString fields Field name Field encoding N (count of discovered neighbors) Type: Unsigned8 Neighbor1 (16-bit address of first candidate) Type: ExtDlUint RSSI1 (radio signal quality of first candidate) Type: Integer8 RSQI1 (radio signal quality of first candidate) Type: Unsigned8 etc. NeighborN (16-bit address of Nth candidate) Type: ExtDlUint RSSIN (radio signal quality of Nth candidate) Type: Integer8 RSQIN (radio signal quality of Nth candidate) Type: Unsigned8 References 1. IEC 62591: Industrial Communication Networks - Wireless Communication Network and Communication Profiles - WirelessHART. 2. IEC 62734: Industrial communication networks - Fieldbus specifications - Wireless systems for industrial automation: process control and related applications - ISA100.11a. From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen Sent: Wednesday, September 11, 2013 8:54 PM To: Thomas Watteyne Cc: 6TSCH Subject: Re: [6tsch] report flow contents Hi Thomas, my 5 cents. I agree on adding NACK information and timing differences with other than time source parent neighbors. I will add to the wiki :-) As regards to the differences of what we do at 6TiSCH and WHart or ISA100.11a, our proposal is more flexible and has less cohesion with a cost of increased complexity (e.g configurable data and reporting period). We have to analyse carefully what are the implications in terms of protocol complexity and implementation of that mechanism versus how often they would be used. Could we maybe define some "templates" or default configurations so using the 6TiSCH can be done without configuration overhead? Then configuration can be used for those that are really interested on tuning their system. just thoughts.. X On Wed, Sep 11, 2013 at 9:58 AM, Thomas Watteyne wrote: Pouria, Wonderful list. Your document clearly highlights that (1) the "report" flows both in WirelessHART and ISA100.11a are strictly periodic and (1) they have a fixed format. From what we have discussed so far, the solutions we are developing is different in the following ways: * 6TiSCH offers a mechanism allowing the PCE to configure what data it want to receive, and configure the trigger for a node to generate from data. * 6TiSCH offers a mechanism allowing the PCE to query the data, on top of having the nodes push the information * In 6TiSCH, the format of the payload is not fixed. In particular, it is possible to add application-specific fields, allowing for extensions. * In 6TiSCH, the transport (CoAP?) and formatting (CBOR?) are IETF-friendly and integrate well in the IPv6 stack and associated mechanisms Did I get that right? A couple of questions: * the WirelessHART "alarms" correspond to a 6TiSCH "events". Yet, I suppose that a "source route failed" and "graph route failed" are out of scope of 6TiSCH, but rather part of RPL. I would expect those to the ICMPv6 messages. Thoughts? * About the per-channel report, I assume this is "per frequency", right? Is a channel report generated for each neighbor? * When comparing your list to Xavi's https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents: * we might want to add a "numNACK" counter to the neighbor information * we might want to keep timing statistics for all neighbors, not just time source parents. That is, when I receive a packet from a neighbor which is not my time source neighbor, I do not change my clock, but I still know the timing error. Thomas On Wed, Sep 11, 2013 at 7:18 AM, wrote: Dear All, In the following, I listed the performance metrics reported to the Network/System Manager in WirelessHART and ISA100.11a. Some reports still need be added, for example the path failure alerts in ISA100.11a. Pouria WirelessHART performance metrics In WirelessHART[1] network the statistics and events are reported to the Network Manager (act like PCE in 6TiSCH) through the following commands: 1. Report "Device Health" This report is sent periodically toward the Network Manager. The report summaries the communication statistics of a device. Byte Format Description 0-1 Unsigned-16 Number of packets generated by this device since last report 2-3 Unsigned-16 Number of packets terminated by this device since last report 4 Unsigned-8 Number of Data-Link Layer MAC MIC failures detected 5 Unsigned-8 Number of Network Layer (Session) MIC failures detected 6 Enum-8 Power Status 7 Unsigned-8 Number of CRC Errors detected 2. Report "Neighbor Health List" This report is sent periodically toward the Network Manager. The report includes the statistics of linked neighbors. Byte Format Description 0 Unsigned-8 Neighbor table index 1 Unsigned-8 Number of Neighbor entries read 2 Unsigned-8 Total number of neighbors 3-4 Unsigned-16 Nickname of neighbor 5 Bit-8 Neighbor Flags 6 Signed-8 Mean RSL (Receive Signal Level in dBm) since last report 7-8 Unsigned-16 Number of Packets transmitted to this neighbor 9-10 Unsigned-16 Number of Packets received from this neighbor 11-12 Unsigned-16 Packets received from this neighbor 13-. Number of entries based on response byte 1 3. Report "Neighbor Signal Levels" This report is sent periodically toward the Network Manager. The report includes the statistics of discovered (but not linked) neighbors. These neighbors might be discovered when a device has heard the neighbor communication in the discovery links. A device that wish to join a network, send a join request to the Network manager, including this report. Byte Format Description 0 Unsigned-8 Neighbor table index 1 Unsigned-8 Number of Neighbor entries read 2 Unsigned-8 Total number of neighbors 3-4 Unsigned-16 Nickname of neighbor 5 Signed-8 RSL of neighbor in dB 6-8 Repeats (as needed) based on response byte 1 4. Alarm "Path Down" The alarm is sent upon detecting a path failure. Byte Format Description 0-1 Unsigned-16 Nickname of neighbor to which path failure was detected 5. Alarm "Source Route Failed" This alarm is sent upon detecting a source route failure. Byte Format Description 0-1 Unsigned-16 Nickname of unreachable neighbor in the source route 2-5 Unsigned-32 Network-Layer MIC (i.e., the MIC generated using the session key) from the NPDU that failed routing 6. Alarm "Graph Route Failed" This alarm is sent upon detecting a graph route failure. Byte Format Description 0-1 Unsigned-16 Graph Id of the failed route ISA100.11a performance metric In ISA100.11a[2], the L2 performance metrics are reported to the System Manager (act like PCE in 6TiSCH) and can be classified into (1) DL_Connectivity alert and (2) NeighborDiscovery alert. 1. DL_Connectivity alert The DL_connectivity alert can be classified into (a) Per-neighbor reports and (b) Per-channel reports. * Per-neighbor report Per-neighbor reports are the performance metrics about the neighbors connection and are reported to the System Manager. These statistics are accumulated in the "dlmo.NeighborDiag" attribute, for each neighbor. This report is similar to "Neighbor Health List" report in WirelessHART. Each node in ISA100.11a might be asked to report the following statistics about its neighbor: Octets Format Description 1 Signed-8 RSSI (level) 1 Unsigned-8 RSQI (level) 1-2 ExtDLUint RxDPDU(count): Number of valid Packets received from this neighbor 1-2 ExtDLUint TxSuccessful (count):Count of successful unicast transmissions to the neighbor 1-2 ExtDLUint TxFailed (count): Number of unicast transmission, without getting any ACK or NACK 1-2 ExtDLUint TxCCA_Backoff (count): Number of unicast transmission aborted due to CCA 1-2 ExtDLUint TxNACK (count): Number of NACKs received 2 Signed-16 ClockSigma (level): A rough estimate of standard deviation of clock corrections * Per-channel report In addition, in ISA100.11a, several performance metrics are reported based on channel for all neighbors to the System Manager. These statistics are accumulated in the "dlmo.ChannelDiag" attribute. This report is similar to "Device Health" report in WirelessHART. Byte Format Description 0-2 Unsigned-16 Count (Number of attempted unicast transmissions for all channels) 3 Integer-8 (Percentage of time transmissions on channel 0 did not receive an ACK) 4 Integer-8 (Percentage of time transmissions on channel 0 aborted due to CCA) . 33 Integer-8 (Percentage of time transmissions on channel 15 did not receive an ACK) 34 Integer-8 (Percentage of time transmissions on channel 15 aborted due to CCA) 2. NeighborDiscovery alert In ISA100.11a, each node sends a report, including a list of candidate (overheard) neighbors, to the System Manager to make a potential new routing decisions. The "dlmo.Candidates" attributed is used to store those information in each node in the L2. This report is similar to the "Neighbor Signal Levels" report in WirelessHART. Octets Format Description 1 Unsigned-8 N (count of discovered neighbors) 0-2 ExtDlUint address 0-1 Signed-8 0-1 Unsigned-8 . 0-2 ExtDlUint address 0-1 Signed-8 0-1 Unsigned-8 References 1. IEC 62591: Industrial Communication Networks - Wireless Communication Network and Communication Profiles - WirelessHART. 2. IEC 62734: Industrial communication networks - Fieldbus specifications - Wireless systems for industrial automation: process control and related applications - ISA100.11a. From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Thomas Watteyne Sent: Saturday, September 07, 2013 7:43 PM To: Xavi Vilajosana Cc: Pascal Thubert (pthubert); 6tsch@ietf.org Subject: Re: [6tsch] report flow contents Xavi, Great, thanks! Thomas On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen wrote: Hi, I created the scratchpad section in the wiki to keep ideas https://bitbucket.org/6tsch/meetings/wiki/Home and added the flow content information here. https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents have a nice weekend! X On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen wrote: Hi Pascal, it is a good idea! I will collect that information and as Thomas put it at the wiki so we do not lose it. :-) X On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) wrote: Hello Xavi: At the call I mentioned we could use info on tracks and cells as well, probably on demand from the PCE. For instance, the PCE could observe energy levels over some cells for a while to make sure they are clean. What do you think? Pascal From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen Sent: vendredi 6 septembre 2013 01:17 To: Thomas Watteyne Cc: 6tsch@ietf.org Subject: Re: [6tsch] report flow contents agreed! So the fields become: For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -AVG LQI in a running window [optional] -Latest LQI [optional] -Num TX packets (option in case there is communication with that neighbor) -Num ACK packets (option in case there is communication with that neighbor) -Num RX packets (option in case there is communication with that neighbor) -Last ASN when it heart about that neighbor -Bundle: Num links in the Schedule to that neighbor -PDR per link [Optional -- or maybe best and worst PDR only] -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -For each Queue: - Avg Queue length in a running window - Max Queue length in a running window (peak) - Current Queue length (?) - ASN of the oldest packet in the QUEUE? -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -Time source parent -ID -Avg clock drift (correction done) in a running window -Latest clock correction -Parent changes (counter of how many times I changed my time source parent) -Option Flag (weather there are optional TLV fields on that category) +(TLV objects)* -Option Flag (weather there are optional TLV fields in other categories) +(TLV objects)* as regards to this: "Finally, do you envision a generic mechanism whereby the PCE can turn fields on/off, or triggered independently?" I see it as CoAP Options, where a set of bytes can be used as "clever bitmap" to tell what options are there, the parsing will decode option by option and will read the fields. In that way any combination of fields is supported. would that work? X On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne wrote: Xavi, Fantastic! I believe PDR for each link might be too long to fit in a packet. While the mote will most likely keep that information, we could move that to the query flow, i.e. it is available to the PCE on-demand. Would you agree that the number of links in a bundle belongs to the neighbor? Of maybe we want a "bundle" category? In queuing, it might be interesting to see the age of the different packets, to be able to monitor latency. About LQI, there is no general consensus among vendors on what the definition is, or how exactly it is calculated. I would make it optional. Also, it might be good to be able to add arbitrary fields to each category: neighbor, queue, time source neighbor. Finally, do you envision a generic mechanism whereby the PCE can turn fields on/off, or triggered independently? Thomas On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen wrote: Hi Thomas, Diego, I agree that LQI should be there as well. I update here the list with Thomas suggestions. For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -AVG LQI in a running window -Latest LQI -Num TX packets (option in case there is communication with that neighbor) -Num ACK packets (option in case there is communication with that neighbor) -Num RX packets (option in case there is communication with that neighbor) -Last ASN when it heart about that neighbor Other fields -Num links in the Schedule to that neighbor -For each link PDR -For each Queue: - Avg Queue length in a running window - Max Queue length in a running window (peak) - Current Queue length (?) -Time source parent -ID -Avg clock drift (correction done) in a running window -Latest clock correction -Parent changes (counter of how many times I changed my time source parent) -Option Flag (weather there are optional TLV fields) +(TLV objects)* Hope this makes sense. cheers! Xavi On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne wrote: [renamed thread] Xavi, A few thoughts: - the counters (numTx, etc) will only be present for neighbors the node has communicate with, so they should be optional in the packet. - you have focused on the topological information (which I think is the right one). It might be useful to gather other data related to synchronization or queuing. - I couldn't agree more with your suggestion to make it extensible. This does mean that we will need to state somewhere that a device need to ignore silently fields it does not understand. Thomas On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen wrote: Hello, I guess that flows are getting defined and I started to think on the contents of the messages on that flows. Not sure if this is the right time or I am going way far.. According to the previous discussion I assume that the five flows are: ME-6TOP - Query Flow ME-6TOP - Action Flow 6TOP - ME - Report Flow 6TOP - ME - Event Flow 6TOP - ME - Request BW Flow I'd like to start defining the content of the messages in the Report Flow: The Report Flow: has to deal with the information that a node knows and has to be sent to the ME so the ME can compute the schedule among others. Here I list the information that we can know in a mote and can be used at the ME to compute the schedule (complete please if I miss something) For each known neighbor: -ID -AVG RSSI in a running window -Latest RSSI -Num TX packets -Num ACK packets -Num RX packets -Last ASN when it heart about that neighbor Other fields -Num links in the Schedule to that neighbor -For each link PDR Then we need to have some TLV like objects that can be used for ad-hoc/naive/other extensions of the reporting process. In that way we don't constraint the implementation of the scheduling alg. to that information. what do you think? X On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote: Hi all, In this thread, we will continue the discussion about Confirmation message. Here is some background information. Context: e.g. - node sends a report and want to know if the report is accepted., - ME sends a action request and want to know if/when the action taken. Options: (1) Nothing (2) Rely on transport mechanism (e.g. confirmable CoAP message) (3) App-level ACK type (4) Use different flow (i.e. action flow) IMHO, different control flow may have different requirement for confirmation message. (1) Action Flow, needs a App-level confirmation, like Succ/Fail (2) Query Flow, automatically has the confirmation, i.e. the message packet corresponding to a specific query. (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer option (1) and (3), i.e. the confirmation message is an option, but if a confirmation message is needed, it should be App-level Ack, instead of transport layer confirmation, which will give 6top more flexibility. What do you think? Thanks Qin _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch ------=_NextPart_001_0033_01CEAF9B.3AD592B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi = All,

 

Do you think is it feasible to = add a bit/flag that allows some form of in-network processing ? =

 

This would be very useful to = distributed/decentralized scheduling techniques and should not cost that = much.

 

Any thoughts is = welcome.

 

Cheers

 

Alfredo

 

Da: 6tsch-bounces@ietf.org = [mailto:6tsch-bounces@ietf.org] Per = conto di P.Zand@utwente.nl
Inviato: Wednesday, September 11, = 2013 10:45 PM
A: = xvilajosana@eecs.berkeley.edu; watteyne@eecs.berkeley.edu
Cc: 6tsch@ietf.org
Oggetto: Re: [6tsch] report flow = contents

 

Thomas,

I agree with you that "source route failed" and = "graph route failed" are out of scope of = 6TiSCH.

Regarding to you question about the per-channel report, I think = they are based on each radio channel supported by the specification = (channel 11-26 in 2.4GHz in IEEE 802.15.4), not channel offset. And a = channel report generated for all = neighbor.

Regarding to your first question, let me now explain more. I think = both of these standard provide a mechanisms to make it possible for = System/Network Manager to also read (pull) desired attributes (But not = all the feature in 6TiSCH). For example in WirelessHART [1], by = “Report Neighbor Health List” request, the network manager = might mention the number of neighbors to be read in “Number of = Neighbor entries read” field..

I think, ISA100.11a provides more mechanisms for System manager to = get the desired attributes from the field devices. And the first two = features that you mentioned might also be supported by = ISA100.11a.

In ISA100.11a, three mechanisms are provided for reporting = diagnostic information contained in dlmo.NeighborDiag (described in = section 1 later) and dlmo.ChannelDiag (described in Section 2 = later):

  1. The health reports = concentrator object (HRCO), can be configured to report any attribute in = the DL on a periodic basis. dlmo.NeighborDiag = entries (shown in Table 2) and dlmo.ChannelDiag (shown in Table 5) can = be reported through that mechanism. Through the HRCO, the system manager = can configure the device to report NeighborDiag periodically, such as = every 30 minutes. Following each such report, on a per-entry basis, = NeighborDiag counts shall be reset to zero. Levels shall use the current = value as a starting point for the next period = [2].
  2. Diagnostic information = can be retrieved at any time by the system manager, by reading the = applicable attributes. The system manager can read (poll) NeighborDiag = as a read-only attribute on a = per-entry basis. As in an HRCO report, counts shall be reset = to zero when read [2].
  3. Diagnostic information = can be reported by the DL on an = exception basis, through the DL_Connectivity alert (Described = in section 3(a)). The DL can additionally be configured, through the = dlmo.AlertPolicy attribute (shown in Table 6), to report NeighborDiag = information when diagnostic values exceed a threshold. Only the row = triggering the alert is reported. No values are reset [2]. =

 

In ISA100.11a, the system manager establishes a DL communication = relationship between a device and its neighbor by adding an entry to the = device’s dlmo.Neighbor attribute (see Table 1). Each such entry = specifies a level of diagnostics to be collected, through the field = dlmo.Neighbor[].DiagLevel. For each neighbor, diagnostics may be = collected at a baseline level, or a detailed level including clock = diagnostics [2]. This levels are described in Section = 1.

<= a name=3D"_Ref366699100">Table 1. dlmo.Neighbor fields [2]

Field name

Field encoding

* Index = (16-bit address of neighbor)

ExtDlUint = (used as an index)

EUI64 = (EUI-64 identifier of the neighbor)

Type: = Unsigned64

…

…

DiagLevel = (selection of neighbor diagnostics to = collect)

Type: = Unsigned2

Bit0 =3D 1 = Collect link diagnostics

Bit1 =3D 1 = Collect clock diagnostics

…

…

 

When the dlmo.Neighbor[].DiagLevel field is set for a particular = neighbor, the DL shall create corresponding entries in the read-only = attribute dlmo.NeighborDiag. NeighborDiag values are accumulated from = the time that the dlmo.NeighborDiag entry is created = [2].

1.      = dlmo.NeighborDiag:

dlmo.NeighborDiag is an indexed OctetString collection that = contains diagnostics for a set of neighbors. The attribute is read-only, = with rows created as needed by the DL = [2].

NeighborDiag entries are instantiated by the system manager, by = setting dlmo.Neighbor[].DiagLevel bits to non-zero values. Iff (if and = only if) Bit0=3D1, then summary diagnostics shall be collected for the = neighbor, consolidated across all channels. Iff Bit1=3D1, then detailed = clock diagnostics shall be collected for the neighbor, consolidated = across all radio channels [2].

<= a name=3D"_Ref366695775">Table 2. dlmo.NeighborDiag fields = [2]

Field = name

Field = encoding

* = Index

Type: = ExtDlUint (neighbor address, used as an = index)

Summary

Type: = OctetString (see Table 3)

ClockDetail

Type: = OctetString (see Table = 4)

 

<= a name=3D"_Ref366695834">Table 3. Diagnostic Summary OctetString fields = [2]

Field = name

Field = encoding

RSSI = (level)

Type: = Integer8

RSQI = (level)

Type: = Unsigned8

RxDPDU = (count)

Type: = ExtDlUint

TxSuccessfu= l (count)

Type: = ExtDlUint

TxFailed = (count)

Type: = ExtDlUint

TxCCA_Backo= ff (count)

Type: = ExtDlUint

TxNACK = (count)

Type: = ExtDlUint

ClockSigma = (level)

Type: = Integer16

 

<= a name=3D"_Ref366695843">Table 4. Diagnostic ClockDetail OctetString fields = [2]

Field = name

Field = encoding

ClockBias = (level, signed)

Type: = Integer16

ClockCount = (count)

Type: = ExtDlUint

ClockTimeou= t (count)

Type: = ExtDlUint

ClockOutlie= rs (count)

Type: = ExtDlUint

 

2.      = dlmo.ChannelDiag:

dlmo.ChannelDiag is a read-only dynamic attribute that reports = DPDU transmit failure rates on each radio channel supported by the = specification. This enables the system manager to be aware of consistent = connectivity problems on a per-channel basis, as a diagnostic for = spectrum management in a subnet [2].

Two diagnostics are reported for each channel, each indicating a = different type of failure. indicates the percentage of time that unicast DPDU transmissions = on channel N did not receive an ACK or a NACK. indicates the percentage of time that unicast DPDU transmissions = on channel N were aborted due to CCA. [2]

<= a name=3D"_Ref366700989">Table 5. dlmo.ChannelDiag fields

Field = name

Field = encoding

Count = (Number of attempted unicast transmissions for all = channels)

Type:Unsign= ed16

= (Percentage of time transmissions on channel 0 did not receive an = ACK)

Type: = Integer8

= (Percentage of time transmissions on channel 0 aborted due to = CCA)

Type: = Integer8

…

 =

= (Percentage of time transmissions on channel 15 did not receive an = ACK)

Type: = Integer8

= (Percentage of time transmissions on channel 15 aborted due to = CCA)

Type: = Integer8

 

3.      = Data link layer = alerts

  1. DL_Connectivity = alert

DL performance diagnostics are accumulated in the attributes = dlmo.NeighborDiag for per-neighbor diagnostics, and = dlmo.ChannelDiag for per-channel diagnostics. Normally = the system manager configures the HRCO to report these diagnostics = periodically, and the DL automatically resets the diagnostic counters = whenever these attributes are so reported. Between such reports, = diagnostics may indicate a problem that needs to be reported to the = system manager immediately. The DL_Connectivity alert provides the = mechanism for the DL to report such issues, and the dlmo.AlertPolicy = attribute enables the system manager to set thresholds for such = reporting [2].

The attribute dlmo.AlertPolicy enables/disables the = DL_Connectivity alert and provides thresholds to control whether alerts = are reported. dlmo.AlertPolicy is an OctetString containing fields as = shown in Table 6 [2].

<= a name=3D"_Ref366697318">Table 6. dlmo.AlertPolicy fields

Field = name

Field = scalar type

Descriptor = (Enables or disabled the DL_Connectivity = alert.)

Type Alert = report descriptor

NeiMinUnica= st (Minimum number of unicast transactions needed for a neighbor = report.)

Type: = ExtDlUint

NeiErrThres= h (Report neighbor diagnostic if the percentage error rate reaches this = threshold )

Type: = Unsigned8

ChanMinUnic= ast (Minimum number of unicast transactions on a channel needed as a = pre-condition for triggering an = alert.)

Type: = ExtDlUint

NoAckThresh= (Report ChannelDiag if a NoAck value is greater than this = threshold)

Type: = Unsigned8

CCABackoffT= hresh (Report ChannelDiag if a CCABackoff value is greater than this = threshold)

Type: = Unsigned8

 

  1. NeighborDiscovery = alert

The NeighborDiscovery alert provides a mechanism for the DL to = report the contents of the OctetString in dlmo.Candidates attribute (see = Table 7).

The neighbors in the dlmo.Neighbor attribute are set by the system = manager, not by the device itself. The DL autonomously builds a list of = candidate neighbors in the dlmo.Candidates attribute. This list is then = forwarded to the system manager. The system manager considers the radio = connectivity that is reported in dlmo.Candidates, but may also consider = other criteria such as resource constraints, historical performance, or = subnet topology [2].

<= a name=3D"_Ref366697703">Table 7. dlmo.Candidates OctetString = fields

Field = name

Field = encoding

N (count = of discovered neighbors)

Type: = Unsigned8

Neighbor1 = (16-bit address of first candidate)

Type: = ExtDlUint

RSSI1 = (radio signal quality of first = candidate)

Type: = Integer8

RSQI1 = (radio signal quality of first = candidate)

Type: = Unsigned8

etc…<= o:p>

 =

NeighborN = (16-bit address of Nth candidate)

Type: = ExtDlUint

RSSIN = (radio signal quality of Nth = candidate)

Type: = Integer8

RSQIN = (radio signal quality of Nth = candidate)

Type: = Unsigned8

 

References

1.           = ; IEC 62591: Industrial Communication Networks - Wireless Communication = Network and Communication Profiles - = WirelessHART.

 

2.           = ; IEC 62734: Industrial communication networks - Fieldbus specifications = - Wireless systems for industrial automation: process control and = related applications - ISA100.11a.

 

 

From: = 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana = Guillen
Sent: = Wednesday, September 11, 2013 8:54 PM
To: Thomas Watteyne
Cc: 6TSCH
Subject: Re: [6tsch] report flow = contents

 

<= div>

Hi = Thomas,

my 5 = cents.

I agree on adding NACK = information and timing differences with other than time source parent = neighbors. I will add to the wiki = :-)

As regards to the differences of = what we do at 6TiSCH and WHart or ISA100.11a, our proposal is more = flexible and has less cohesion with a cost of increased complexity (e.g = configurable data and reporting period). We have to analyse carefully = what are the implications in terms of protocol complexity and = implementation of that mechanism versus how often they would be used. = Could we maybe define some "templates" or default = configurations so using the 6TiSCH can be done without configuration = overhead? Then configuration can be used for those that are really = interested on tuning their system.

just = thoughts..
X

 

 

On Wed, Sep 11, 2013 at 9:58 AM, Thomas = Watteyne <watteyne@eecs.berkeley.edu> = wrote:

Pouria,

 

=

Wonderful = list.

 

=

Your document clearly highlights that (1) the = "report" flows both in WirelessHART and ISA100.11a are = strictly periodic and (1) they have a fixed format. From what we have = discussed so far, the solutions we are developing is different in the = following ways:

  • 6TiSCH offers a mechanism allowing the PCE to configure what = data it want to receive, and configure the trigger for a node to = generate from data.
  • 6TiSCH offers a mechanism allowing the PCE to query the = data, on top of having the nodes push the = information
  • In 6TiSCH, the format of the payload is not fixed. In = particular, it is possible to add application-specific fields, allowing = for extensions.
  • In 6TiSCH, the transport (CoAP?) and formatting (CBOR?) = are IETF-friendly and integrate well in the IPv6 stack and associated = mechanisms

Did I get that = right?

 

=

A couple of = questions:

  • the WirelessHART "alarms" correspond to a 6TiSCH = "events". Yet, I suppose that a "source route = failed" and "graph route failed" are out of scope of = 6TiSCH, but rather part of RPL. I would expect those to the ICMPv6 = messages. Thoughts?
  • About the per-channel report, I assume this is "per = frequency", right? Is a channel report generated for each = neighbor?
  • When comparing your list to Xavi's https://bitbucket.org/6tsch/meetings/wiki/report_flow_c= ontents:
    • we might want to add a "numNACK" counter to the = neighbor information
    • we might want to keep timing statistics for all neighbors, = not just time source parents. That is, when I receive a packet from a = neighbor which is not my time source neighbor, I do not change my clock, = but I still know the timing = error.

Thomas

 

On Wed, Sep 11, 2013 at 7:18 AM, <P.Zand@utwente.nl> = wrote:

Dear All,

In the following, I listed the performance metrics reported to the = Network/System Manager in WirelessHART and = ISA100.11a.

Some reports still need be added, for example the path failure alerts = in ISA100.11a.

Pouria

 

WirelessHART performance = metrics

In WirelessHART[1] network the statistics and events are reported = to the Network Manager (act like PCE in 6TiSCH) through the following = commands:

  1. Report “Device = Health”

This report is sent periodically toward the Network Manager. The = report summaries the communication statistics of a = device.

Byte=

Format

Description=

0-1<= /font>

Unsigned-16=

Number of = packets generated by this device since last = report

2-3<= /font>

Unsigned-16=

Number of = packets terminated by this device since last = report

4

Unsigned-8<= /span>

Number of = Data-Link Layer MAC MIC failures = detected

5

Unsigned-8<= /span>

Number of = Network Layer (Session) MIC failures = detected

6

Enum-8

Power = Status

7

Unsigned-8<= /span>

Number of = CRC Errors detected

 

  1. Report “Neighbor = Health List”

This report is sent periodically toward the Network Manager. The = report includes the statistics of linked = neighbors.

Byte=

Format

Description=

0

Unsigned-8<= /span>

Neighbor = table index

1

Unsigned-8<= /span>

Number of = Neighbor entries read

2

Unsigned-8<= /span>

Total = number of neighbors

3-4<= /font>

Unsigned-16=

Nickname = of neighbor

5

Bit-8

Neighbor = Flags

6

Signed-8

Mean RSL = (Receive Signal Level in dBm) since last = report

7-8<= /font>

Unsigned-16=

Number of = Packets transmitted to this = neighbor

9-10=

Unsigned-16=

Number of = Packets received from this = neighbor

11-12

Unsigned-16=

Packets = received from this neighbor

13-…<= /span>

 

Number of = entries based on response byte = 1

 

  1. Report “Neighbor = Signal Levels”

This report is sent periodically toward the Network Manager. The = report includes the statistics of discovered (but not linked) neighbors. = These neighbors might be discovered when a device has heard the neighbor = communication in the discovery links. A device that wish to join a = network, send a join request to the Network manager, including this = report.

Byte=

Format

Description=

0

Unsigned-8<= /span>

Neighbor = table index

1

Unsigned-8<= /span>

Number of = Neighbor entries read

2

Unsigned-8<= /span>

Total = number of neighbors

3-4<= /font>

Unsigned-16=

Nickname = of neighbor

5

Signed-8

RSL of = neighbor in dB

6-8<= /font>

 

Repeats = (as needed) based on response byte = 1

 

  1. Alarm “Path = Down”

The alarm is sent upon detecting a path failure. =

Byte=

Format

Description=

0-1<= /font>

Unsigned-16=

Nickname = of neighbor to which path failure was = detected

 

  1. Alarm "Source Route = Failed"

This alarm is sent upon detecting a source route = failure.

Byte=

Format

Description=

0-1<= /font>

Unsigned-16=

Nickname = of unreachable neighbor in the source = route

2-5<= /font>

Unsigned-32=

Network-Lay= er MIC (i.e., the MIC generated using the session key) from the NPDU = that failed routing

 

  1. Alarm "Graph Route = Failed"

This alarm is sent upon detecting a graph route = failure.

Byte=

Format

Description=

0-1<= /font>

Unsigned-16=

Graph Id = of the failed route

 


<= p style=3D'margin-bottom:10.0pt;line-height:115%'> 

ISA100.11a performance = metric

In ISA100.11a[2], the L2 performance metrics are reported to the = System Manager (act like PCE in 6TiSCH) and can be classified into (1) = DL_Connectivity alert and (2) NeighborDiscovery = alert.

  1. DL_Connectivity = alert

The DL_connectivity alert can be classified into (a) Per-neighbor = reports and (b) Per-channel reports.

    • Per-neighbor report

Per-neighbor reports are the  performance metrics about the = neighbors connection and are reported to the System Manager. These = statistics are accumulated in the “dlmo.NeighborDiag” = attribute, for each neighbor. This report is similar to “Neighbor = Health List” report in WirelessHART. =

Each node in ISA100.11a might be asked to report the following = statistics about its neighbor:

 

Octets

Format

Description=

1

Signed-8

RSSI = (level)

1

Unsigned-8<= /span>

RSQI = (level)

1-2<= /font>

ExtDLUint

RxDPDU(coun= t): Number of valid Packets received from this neighbor =

1-2<= /font>

ExtDLUint

TxSuccessfu= l (count):Count of successful unicast transmissions to the neighbor =

1-2<= /font>

ExtDLUint

TxFailed = (count): Number of unicast transmission, without  getting any ACK = or NACK

1-2<= /font>

ExtDLUint

TxCCA_Backo= ff (count): Number of unicast transmission aborted due to = CCA

1-2<= /font>

ExtDLUint

TxNACK = (count): Number of NACKs = received

2

Signed-16

ClockSigma = (level): A rough estimate of standard deviation of clock = corrections

 

    • Per-channel report

In addition, in ISA100.11a, several performance metrics are = reported based on channel for all neighbors to the System Manager. These = statistics are accumulated in the “dlmo.ChannelDiag” = attribute. This report is similar to “Device Health” report = in WirelessHART.

Byte=

Format

Description=

0-2<= /font>

Unsigned-16=

Count = (Number of attempted unicast transmissions for all = channels)

3

Integer-8

(Percentage= of time transmissions on channel 0 did not receive an = ACK)

4

Integer-8

(Percentage= of time transmissions on channel 0 aborted due to = CCA)

…

 

 

33

Integer-8

(Percentage= of time transmissions on channel 15 did not receive an = ACK)

34

Integer-8

(Percentage= of time transmissions on channel 15 aborted due to = CCA)

 

  1. NeighborDiscovery = alert

In ISA100.11a, each node sends a report, including a list of = candidate (overheard) neighbors, to the System Manager to make a = potential new routing decisions. The “dlmo.Candidates” = attributed is used to store those information in each node in the L2. = This report is similar to the “Neighbor Signal Levels” = report in WirelessHART.

Octets

Format

Description=

1

Unsigned-8<= /span>

N (count = of discovered neighbors)

0-2<= /font>

ExtDlUint

address

0-1<= /font>

Signed-8

<= /td>

0-1<= /font>

Unsigned-8<= /span>

<= /td>

…

 

 

0-2<= /font>

ExtDlUint

address

0-1<= /font>

Signed-8

<= /td>

0-1<= /font>

Unsigned-8<= /span>

<= /td>

 

 

References

1.     =   IEC 62591: Industrial Communication Networks - Wireless = Communication Network and Communication Profiles - = WirelessHART.

 

2.     =   IEC 62734: Industrial communication networks - Fieldbus = specifications - Wireless systems for industrial automation: process = control and related applications - = ISA100.11a.

 

 

 

From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Thomas = Watteyne
Sent: = Saturday, September 07, 2013 7:43 PM
To: Xavi Vilajosana
Cc: Pascal Thubert (pthubert); 6tsch@ietf.org
Subject: Re: [6tsch] report flow = contents

 

Xavi,

Great, = thanks!

Thomas

 

On = Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu> = wrote:

Hi,
I created the scratchpad = section in the wiki to keep ideas
https://bitbucket.org/6tsch/meetings/wiki/Home
<= br>
and added the flow content information here.

https://bitbucket.org/6tsch/meetings/wiki/report_flow_c= ontents

have a nice = weekend!

X

 

On = Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu> = wrote:

Hi Pascal, it is a good = idea!

I will collect that = information and as Thomas put it at the wiki so we do not lose = it.

:-)

X

 

<= p>On Fri, Sep 6, 2013 at 8:51 AM, Pascal = Thubert (pthubert) <pthubert@cisco.com> = wrote:

Hello Xavi:

 

At the call I mentioned we could use info on tracks and cells as = well, probably on demand from the = PCE.

For instance, the PCE could observe energy levels over some cells = for  a while to make sure they are = clean.

 

What do you think?

Pascal

 

From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana = Guillen
Sent: vendredi = 6 septembre 2013 01:17
To: Thomas Watteyne
Cc: 6tsch@ietf.org
Subject: Re: [6tsch] report flow = contents

 

agreed!

So the fields = become:

 

=

 

=

For each = known neighbor:

 -ID

 -AVG = RSSI in a running window

 -Latest = RSSI

 -AVG = LQI in a running window = [optional]

 -Latest = LQI [optional]

 -Num TX = packets (option in case there is communication with that = neighbor)

 -Num = ACK packets (option in case there is communication with that = neighbor)

 -Num RX = packets (option in case there is communication with that = neighbor)

 -Last = ASN when it heart about that = neighbor 

 -Bundle:= Num links in the Schedule to that = neighbor

    =   -PDR per link [Optional -- or maybe best and worst PDR = only]

=  

=  -Option Flag (weather there are optional TLV fields on that = category)

=    +(TLV = objects)* 

 <= /font>

 -For = each Queue:

    = - Avg Queue length in a running = window

    = - Max Queue length in a running window = (peak)

    = - Current Queue length = (?)

    = - ASN of the oldest packet in the = QUEUE?

    = -Option Flag (weather there are optional TLV fields on that = category)

    =     +(TLV = objects)* 

 <= /font>

-Time source = parent

    = -ID

    = -Avg clock drift (correction done) in a running = window

    = -Latest clock correction

    = -Parent changes (counter of how many times I changed my time source = parent)

    = -Option Flag (weather there are optional TLV fields on that = category)

    = +(TLV objects)* 

 <= /font>

-Option Flag = (weather there are optional TLV fields in other = categories)

  =  +(TLV = objects)* 

 

=

as regards to = this:

 

=

"Finally,= do you envision a generic mechanism whereby the PCE can turn fields = on/off, or triggered = independently?"

 

=

I see it as = CoAP Options, where a set of bytes can be used as "clever = bitmap" to tell what options are there, the parsing will decode = option by option and will read the fields. In that way any combination = of fields is supported.

 

=

would that = work?

X

 

On = Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <watteyne@eecs.berkeley.edu> = wrote:

Xavi,

 

=

Fantastic!

<= div>

 

=

I believe PDR for each link might be too long = to fit in a packet. While the mote will most likely keep that = information, we could move that to the query flow, i.e. it is available = to the PCE on-demand.

 

=

Would you agree that the number of links in a = bundle belongs to the neighbor? Of maybe we want a "bundle" = category?

 

=

In queuing, it might be interesting to see = the age of the different packets, to be able to monitor = latency.

 

=

About LQI, there is no general consensus = among vendors on what the definition is, or how exactly it is = calculated. I would make it = optional.

 

=

Also, it might be good to be able to add = arbitrary fields to each category: neighbor, queue, time source = neighbor.

 

=

Finally, do you envision a generic mechanism = whereby the PCE can turn fields on/off, or triggered = independently?

 <= /p>

Thomas<= /p>

 

On = Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu> = wrote:

Hi Thomas, = Diego,

 

=

I agree that LQI should be there as well. I = update here the list with Thomas = suggestions. 

 

=

For each = known neighbor:

 -ID

 -AVG = RSSI in a running window

 -Latest = RSSI

 -AVG = LQI in a running window

 -Latest = LQI

 -Num TX = packets (option in case there is communication with that = neighbor)

 -Num = ACK packets (option in case there is communication with that = neighbor)

 -Num RX = packets (option in case there is communication with that = neighbor)

 -Last = ASN when it heart about that = neighbor 

 <= /font>

Other = fields

 -Num = links in the Schedule to that = neighbor

    = -For each link = PDR

 -For = each Queue:

    = - Avg Queue length in a running = window

    = - Max Queue length in a running window = (peak)

    = - Current Queue length = (?)

-Time source = parent

    = -ID

    = -Avg clock drift (correction done) in a running = window

    = -Latest clock correction

    -Parent changes (counter of how = many times I changed my time source = parent)

 

=

-Option Flag (weather there are optional TLV = fields)

  =  +(TLV = objects)* 

 

=

 

=

Hope this makes = sense.

cheers!
Xavi

 

On = Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu> = wrote:

[renamed = thread]

 =

Xavi,<= /font>

 =

A few = thoughts:

- the = counters (numTx, etc) will only be present for neighbors the node has = communicate with, so they should be optional in the = packet.

- you have = focused on the topological information (which I think is the right one). = It might be useful to gather other data related to synchronization or = queuing.

- I couldn't = agree more with your suggestion to make it extensible. This does mean = that we will need to state somewhere that a device need to ignore = silently fields it does not = understand.

 =

Thomas=

 

On = Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu> = wrote:

Hello, I guess that flows = are getting defined and I started to think on the contents of the = messages on that flows. Not sure if this is the right time or I am going = way far..

 

<= p>According to the previous discussion I assume = that the five flows are:

 

=

ME-6TOP - Query = Flow

ME-6TOP - = Action Flow

 

=

6TOP - ME - Report = Flow

6TOP - ME - = Event Flow

6TOP - ME - = Request BW Flow

 

=

I'd like to start defining the content of the = messages in the Report = Flow:

 

=

The Report Flow: has to deal with the = information that a node knows and has to be sent to the ME so the ME can = compute the schedule among others. Here I list  the information = that we can know in a mote and can be used at the ME to compute the = schedule (complete please if I miss = something)

 

=

For each known = neighbor:

 -ID

 -AVG RSSI in a running = window

 -Latest = RSSI

 -Num TX = packets

 -Num ACK = packets

 -Num RX = packets

 -Last = ASN when it heart about that = neighbor 

 

=

Other = fields

 -Num = links in the Schedule to that = neighbor

    = -For each link PDR

 

=

 

=

Then we need to have some TLV like objects = that can be used for ad-hoc/naive/other extensions of the reporting = process. In that way we don't constraint the implementation of the = scheduling alg. to that = information.

 

=

what do you = think?

X

 

<= div>

On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang = <qinwang@berkeley.edu> = wrote:

Hi = all,

 

In = this thread, we will continue the discussion about Confirmation message. = Here is some background = information.

 

=

Context: = e.g.

    = - node sends a report and want to know if the report is = accepted., 

    - ME sends a action request and = want to know if/when the action = taken.

Options:

   (1) = Nothing

  =  (2) Rely on transport mechanism (e.g. confirmable CoAP = message)

  =  (3) App-level ACK = type

  =  (4) Use different flow (i.e. action = flow)

 

=

IMHO, different control flow may have = different requirement for confirmation = message.

    = (1) Action Flow, needs a App-level confirmation, like = Succ/Fail

    = (2) Query Flow, automatically has the confirmation, i.e. the message = packet corresponding to a specific = query.

    = (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer = option (1) and (3), i.e. the confirmation message is an option, but if a = confirmation message is needed, it should be App-level Ack, instead of = transport layer confirmation, which will give 6top more = flexibility.

 

=

What do you = think?

 

=

Thanks

=

Qin

=

  =   

 

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https://www.ietf.org/mailman/listinfo/6tsch

 


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https://www.ietf.org/mailman/listinfo/6tsch

 


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__________________________________________= _____
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https://www.ietf.org/mailman/listinfo/6tsch

 

 

 

 

 


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X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AjwGAFyKMVKtJXG//2dsb2JhbABbDoI1RDhSuBmIPYEZFnSCJQEBAQQBAQEaEEEEBxIBGQQBAQsWAQYuCxQJCQEEDgUIh3oMvBCOLIEOLQQGgx6BAAOFTZNbkEOBZX4/gWhC X-IronPort-AV: E=Sophos;i="4.90,890,1371081600"; d="scan'208,217";a="258760420" Received: from rcdn-core2-4.cisco.com ([173.37.113.191]) by rcdn-iport-5.cisco.com with ESMTP; 12 Sep 2013 09:37:29 +0000 Received: from xhc-rcd-x08.cisco.com (xhc-rcd-x08.cisco.com [173.37.183.82]) by rcdn-core2-4.cisco.com (8.14.5/8.14.5) with ESMTP id r8C9bTW8024749 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 12 Sep 2013 09:37:29 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-rcd-x08.cisco.com ([173.37.183.82]) with mapi id 14.02.0318.004; Thu, 12 Sep 2013 04:37:28 -0500 From: "Pascal Thubert (pthubert)" To: Qin Wang Thread-Topic: Rank rounding error, churn and hysteresis [was Zero Objective Function discussion] Thread-Index: Ac6vm5sQmXv66Fd9Qfi2BVSTMvdHeQ== Date: Thu, 12 Sep 2013 09:37:27 +0000 Deferred-Delivery: Thu, 12 Sep 2013 09:37:00 +0000 Message-ID: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.49.80.34] Content-Type: multipart/alternative; boundary="_000_E045AECD98228444A58C61C200AE1BD84147249Cxmbrcdx01ciscoc_" MIME-Version: 1.0 Cc: Thomas Watteyne , 6TSCH <6tsch@ietf.org>, "xvilajosana@eecs.berkeley.edu" Subject: [6tsch] Rank rounding error, churn and hysteresis [was Zero Objective Function discussion] X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Sep 2013 09:37:36 -0000 --_000_E045AECD98228444A58C61C200AE1BD84147249Cxmbrcdx01ciscoc_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hello Qin: In this particular case, a computation of DAGRank(rank) of 7 will prevent t= his node from attaching to other nodes that are also at 7, and will encoura= ge more other nodes to attach to this. The end to end Rank calculation for = children is only slightly affected since the 2 byte rank is used for the to= tal rank computation. I think that the rounding errors are part of the errors, just like the stat= s of transmissions may vary. Depending on the representation of ETX in memory, you might also have syste= m that round to 1 decimal and others to 2 decimals and the same calculation= may still create a similar effect. Is that a big deal? Well, Considering the variations on the ETX computation= I do not think that this makes a lot of difference in the run time. What is more critical is to use a good hysteresis so as to avoid jumping ov= er the integral boundary of DAGRank(rank) all the time. Both RFC 6552 and 6719 recommend you to do that, with RFC 6552 dereferencin= g RFC 6719 that recommends to use a value boundary on Rank before reparenti= ng. http://tools.ietf.org/html/rfc6719#section-3.2.2 : 3. If the smallest path cost for paths through the candidate neighbors is smaller than cur_min_path_cost by less than PARENT_SWITCH_THRESHOLD, the node MAY continue to use the current preferred parent. This is the hysteresis component of MRHOF. RFC 6552 recommends by default to follow that guidance in http://tools.ietf= .org/html/rfc6552#section-4.1 it is thus RECOMMENDED to base the computation of the step_of_rank on dynamic link properties such as the expected transmission count (ETX) metric as introduced in [DeCouto03] and discussed in [RFC6551]. "Mi= nimum Rank Objective Function with Hysteresis" [HYSTERESIS] provides guidance on how link cost can be computed and on how hysteresis can improve Rank stability. Additional tuning or methods exist to increase stability. We can start some= work on that if we find that MRHOF's method is not sufficient in our case. One method (Cisco IPR there) consists in hiding limited variations of the R= ank to the children (around the last advertised 2 bytes value) until: 1) a delta threshold is reached in the step of rank with parent (one-hop hy= steresis) or 2) Rank has to be recomputed because of the parent (the parent changes or t= he Rank of the parent changes) This method creates a laser effect by which a number of new values of Rank = a recomputed and advertised as a single wave, whereby every node affected b= y the change re-centers its rank value to its current moving average, reduc= ing the chances to hit condition 2) in the near future. What do you think? Pascal From: Qin Wang [mailto:qinwang@berkeley.edu] Sent: mercredi 11 septembre 2013 23:58 To: Pascal Thubert (pthubert) Cc: xvilajosana@eecs.berkeley.edu; Thomas Watteyne; 6TSCH Subject: Re: [6tsch] Zero Objective Function discussion Hi Pascal, I agree with your calculation. But, I have a small question. If you calculate with rank_increase=3D(2*xmit/ack)*256, instead of rank_inc= rease=3D(512*xmit/ack), then, you will get the result as follows. r(1)=3Dr(0)+2.66*256 =3D 2.66*256 =3D> DAGRank(rank) =3D 2 r(2)=3Dr(1)+2.66*256=3D 5.32*256 =3D> DAGRank(rank) =3D 5 r(3)=3Dr(2)+2.66*256=3D7.98*256 =3D> DAGRank(rank) =3D 7 r(4)=3Dr(3)+2.66*256=3D10.64*256 =3D> DAGRank(rank) =3D 10 r(5)=3Dr(4)+2.66*256=3D13.30*256 =3D> DAGRank(rank) =3D 13 You can see r(3) is different from that in your calculation. Obviously, the= difference comes from different implementation. In another word, following= same OF, different implementation may lead to different Rank value. Then, = my question is if it is Ok while the motes from different vendors work toge= ther in a DAG. Please point out if I'm wrong. Thanks Qin On Wed, Sep 11, 2013 at 3:08 AM, Pascal Thubert (pthubert) > wrote: Hello Xavi: Great! I'd add the following: RFC 6550 3.5.1. Rank C= omparison (DAGRank())has: " When an Objective Function computes Rank, the Objective Function operates on the entire (i.e., 16-bit) Rank quantity. When Rank is compared, e.g., for determination of parent relationships or loop detection, the integer portion of the Rank is to be used. The integer portion of the Rank is computed by the DAGRank() macro as follows, where floor(x) is the function that evaluates to the greatest integer less than or equal to x: DAGRank(rank) =3D floor(rank/MinHopRankIncrease) For example, if a 16-bit Rank quantity is decimal 27, and the MinHopRankIncrease is decimal 16, then DAGRank(27) =3D floor(1.6875) =3D 1. The integer part of the Rank is 1 and the fractional part is 11/16. " DAGRank(rank) is what we expect to place in the Flow label and the join pri= ority. In our case: r(1)=3Dr(0)+rank_increase =3D 0+683 =3D> DAGRank(rank) =3D 2 r(2)=3Dr(1)+683=3D1366 =3D> DAGRank= (rank) =3D 5 r(3)=3Dr(2)+683=3D2049 =3D> DAGRank= (rank) =3D 8 r(4)=3Dr(3)+683=3D2732 =3D> DAGRank= (rank) =3D 10 r(5)=3Dr(4)+683=3D3415 =3D> DAGRank= (rank) =3D 13 We see that the DAGRank() always increases at least by one. This is the des= ired property so as to ensure that we can detect loop with just one octet i= n the flow label. Note that the real 2 octets Rank does not lose the rounding info since the = DIP always passes 2 octets. Cheers, Pascal From: Xavier Vilajosana Guillen [mailto:xvilajosana@eecs.berkeley.edu] Sent: mardi 10 septembre 2013 19:53 To: Pascal Thubert (pthubert) Cc: Thomas Watteyne; 6TSCH Subject: Re: [6tsch] Zero Objective Function discussion Hi all, after some study I agree that we can use the RFC6552 in the minimal 6TiSCH = configuration. I would like to call for approval or more input from others = before I consolidate the text in the draft. I put here an example following Pascal suggestion: Given Rf =3D 1 Sp =3D 2* ETX Sr =3D 0 minHopRankIncrease =3D 256 (default in RPL) ETX=3D(xmit/ack) r(n) =3D r(p) + rank_increase rank_increase=3D (Rf*Sp + Sr) * minHopRankIncrease rank_increase=3D(512*xmit/ack) if we take 5 hops (95 are supported) network and r(0)=3D0 and xmit=3D100 an= d ack=3D75 for all nodes r(1)=3Dr(0)+rank_increase =3D 0+683 with f=3D0 r(2)=3Dr(1)+683=3D1366 with f=3D1 r(3)=3Dr(2)+683=3D2049 with f=3D2 r(4)=3Dr(3)+683=3D2732 with f=3D2 r(5)=3Dr(4)+683=3D3415 with f=3D3 ... etc... so f is monotonically increasing and the rank function enables more than en= ough hops. Please provide feedback. cheers! Xavi _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_E045AECD98228444A58C61C200AE1BD84147249Cxmbrcdx01ciscoc_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hello Qin:

 <= /p>

In this particular case, = a computation of DAGRank(rank) of 7 will prevent this node from attaching t= o other nodes that are also at 7, and will encourage more other nodes to at= tach to this. The end to end Rank calculation for children is only slightly affected since the 2 byte rank is used for the total rank= computation.

 <= /p>

I think that the rounding= errors are part of the errors, just like the stats of transmissions may va= ry.

Depending on the represen= tation of ETX in memory, you might also have system that round to 1 decimal= and others to 2 decimals and the same calculation may still create a similar effect.

 <= /p>

Is that a big deal? Well,= Considering the variations on the ETX computation I do not think that this= makes a lot of difference in the run time.

 <= /p>

What is more critical is = to use a good hysteresis so as to avoid jumping over the integral boundary = of DAGRank(rank) all the time.

 <= /p>

Both RFC 6552 and 6719 recommend you to do that, with RFC 6= 552 dereferencing RFC 6719 that recommends to use a value boundary on Rank = before reparenting.

http://tools.ietf.org/html/rfc6719#section-3.2.2 :

 <= /p>

   3.  If the smallest path cost for paths = through the candidate

       neighbors is smaller = than cur_min_path_cost by less than

       PARENT_SWITCH_THRESHO= LD, the node MAY continue to use the current

       preferred parent.&nbs= p; This is the hysteresis component of MRHOF.

 <= /p>

RFC 6552 recommends by de= fault to follow that guidance in http://tools.ietf.org/html/rfc6552#section-4.1

 <= /p>

         &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           it is thu= s

   RECOMMENDED to base the computation of the st= ep_of_rank on dynamic

   link properties such as the expected transmis= sion count (ETX) metric

   as introduced in [DeCouto03] and discussed in [RFC6551].  "Minimum

   Rank Objective Function with Hysteresis"= [HYSTERESIS<= /span>] provides

   guidance on how link cost can be computed and= on how hysteresis can

   improve Rank stability.

 <= /p>

Additional tuning or meth= ods exist to increase stability. We can start some work on that if we find = that MRHOF’s method is not sufficient in our case.<= /p>

 <= /p>

One method (Cisco IPR the= re) consists in hiding limited variations of the Rank to the children (arou= nd the last advertised 2 bytes value) until:

1) a delta threshold is r= eached in the step of rank with parent (one-hop hysteresis)

or

2) Rank has to be recompu= ted because of the parent (the parent changes or the Rank of the parent cha= nges)

 <= /p>

This method creates a las= er effect by which a number of new values of Rank a recomputed and advertis= ed as a single wave, whereby every node affected by the change re-centers its rank value to its current moving average, reducing t= he chances to hit condition 2) in the near future.

 <= /p>

What do you think?

 <= /p>

Pascal<= /p>

 <= /p>

From: Qin Wang= [mailto:qinwang@berkeley.edu]
Sent: mercredi 11 septembre 2013 23:58
To: Pascal Thubert (pthubert)
Cc: xvilajosana@eecs.berkeley.edu; Thomas Watteyne; 6TSCH
Subject: Re: [6tsch] Zero Objective Function discussion

 

Hi Pascal,

 

I agree with your calculation. But, I have a small q= uestion.

 

If you calculate with rank_increase= =3D(2*xmit/ack)*256, instead of rank_increase=3D(512*xmit/ack), then, = you will get the result as follows.

 

r(1)=3Dr(0)+2.66*256 =3D 2.66*256 &= nbsp;             =3D> DAGRank(rank) =3D 2=

r(2)=3Dr(1)+2.66*256=3D 5.32*256 &n= bsp;               =3D> DAGRank(= rank) =3D 5

r(3)=3Dr(2)+2.66*256=3D7.98*256 &nb= sp;                =3D> DAGRank(= rank) =3D 7

r(4)=3Dr(3)+2.66*256=3D10.64*256 &n= bsp;              =3D> DAGRank(rank) = =3D 10

r(5)=3Dr(4)+2.66*256=3D13.30*256 &n= bsp;               =3D> DAGRank(= rank) =3D 13

You can see r(3) is different from that= in your calculation. Obviously, the difference comes from different implementation. In another word, following same OF, different im= plementation may lead to different Rank value. Then, my question is if it i= s Ok while the motes from different vendors work together in a DAG.<= span style=3D"font-size:10.0pt;font-family:"Arial","sans-ser= if"">

Please point out if I'm wrong.

Thanks

Qin=

 

 

 

 

 

 

On Wed, Sep 11, 2013 at 3:08 AM, Pascal Thubert (pth= ubert) <pthubert= @cisco.com> wrote:

Hello Xavi:

 

Great!

 

I’d add the following:

 

RFC 6550    3.5=
.1. Rank Comparison (DAGRank())has:

“

When an Objective Function computes Rank, the Objective Function<=
/o:p>
   operates on the entire (i.e., 16-bit) Rank quantity. =
; When Rank is
   compared, e.g., for determination of parent relationships=
 or loop
   detection, the integer portion of the Rank is to be used.=
  The
   integer portion of the Rank is computed by the DAGRank() =
macro as
   follows, where floor(x) is the function that evaluates to=
 the
   greatest integer less than or equal to x:

 


           &nbs=
p;  DAGRank(rank) =3D floor(rank/MinHopRankIncrease)


 


   For example, if a 16-bit Rank quantity is decimal 27, and=
 the


   MinHopRankIncrease is decimal 16, then DAGRank(27) =3D fl=
oor(1.6875) =3D


   1.  The integer part of the Rank is 1 and the fracti=
onal part is


   11/16.


 


“


DAGRank(rank) is what we expect to plac=
e in the Flow label and the join priority.


In our case:


 


r(1)=3Dr(0)+rank_increase =3D 0+=
;683            &nbs=
p;  =3D> DAGRank(rank) =3D 2


r(2)=3Dr(1)+683=3D1366  &=
nbsp;            &nb=
sp;            =
             =
=3D> DAGRank(rank) =3D 5


r(3)=3Dr(2)+683=3D2049  &=
nbsp;            &nb=
sp;             =
;            =3D>=
 DAGRank(rank) =3D 8


r(4)=3Dr(3)+683=3D2732   =
             &n=
bsp;            =
;            =3D>=
 DAGRank(rank) =3D 10


r(5)=3Dr(4)+683=3D3415  &=
nbsp;            &nb=
sp;            =
             =
=3D> DAGRank(rank) =3D 13


 


We see that the DAGRank() always increa=
ses at least by one. This is the desired property so as to
 ensure that we can detect loop with just one octet in the flow label.


Note that the real 2 octets Rank does n=
ot lose the rounding info since the DIP always passes 2 octets.=



 


Cheers,


 


Pascal

 


From: Xavier Vilajosana Guil=
len [mailto:xvilajosana@eecs.berkeley.edu]


Sent: mardi 10 septembre 2013 19:53

To: Pascal Thubert (pthubert)

Cc: Thomas Watteyne; 6TSCH

Subject: Re: [6tsch] Zero Objective Function discussion<=
/o:p>






 






Hi all,



after some study I agree that we can use the RFC6552 in the minimal 6TiSCH =
configuration. I would like to call for approval or more input from others =
before I consolidate the text in the draft.



I put here an example following Pascal suggestion:



Given 



Rf =3D 1

Sp =3D 2* ETX

Sr =3D 0

minHopRankIncrease =3D 256 (default in RPL)






ETX=3D(xmit/ack)






 




r(n) =3D r(p) + rank_increase

rank_increase=3D (Rf*Sp + Sr) * minHopRankIncrease 




rank_increase=3D(512*xmit/ack)





if we take 5 hops (95 are supported) network and r(0)=3D0 and xmit=3D100 an=
d ack=3D75 for all nodes



r(1)=3Dr(0)+rank_increase =3D 0+683 with f=3D0

r(2)=3Dr(1)+683=3D1366 with f=3D1

r(3)=3Dr(2)+683=3D2049 with f=3D2

r(4)=3Dr(3)+683=3D2732 with f=3D2

r(5)=3Dr(4)+683=3D3415 with f=3D3

...

etc...



so f is monotonically increasing and the rank function enables more than en=
ough hops.






Please provide feedback.






cheers!

Xavi






 


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--_000_E045AECD98228444A58C61C200AE1BD84147249Cxmbrcdx01ciscoc_-- From xvilajosana@berkeley.edu Thu Sep 12 06:34:17 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AF7AF11E80EA for <6tsch@ietfa.amsl.com>; Thu, 12 Sep 2013 06:34:17 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.576 X-Spam-Level: X-Spam-Status: No, score=-1.576 tagged_above=-999 required=5 tests=[AWL=0.400, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id J4T9EXTvhV9r for <6tsch@ietfa.amsl.com>; Thu, 12 Sep 2013 06:34:13 -0700 (PDT) Received: from mail-pd0-f174.google.com (mail-pd0-f174.google.com [209.85.192.174]) by ietfa.amsl.com (Postfix) with ESMTP id 118A011E8166 for <6tsch@ietf.org>; Thu, 12 Sep 2013 06:34:10 -0700 (PDT) Received: by mail-pd0-f174.google.com with SMTP id y13so10661404pdi.5 for <6tsch@ietf.org>; Thu, 12 Sep 2013 06:34:09 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=OrLyN/VMApEAYeA41A/chQ4lV4gLe6RH6bXD7EZjCig=; b=g/qhT++WaXPAhqHnKFL7w8q2IF/TqMWAnJ1R0ATenGa7FBz+NuVuFyNxgY5TF1ffc1 xldj//hJsRA1wuhP0VfOAAV896/Llaj1RKMIHn+8l9itt1Tb9LavCUvWMT/D0l9BOYv7 p1mjKt3uQkIHgY0FpuC3mD5EFK+0PnIjt3dXSoi54nrZXEmGzKP+hDtVhtWsU369JOaW KhNrFfp7k67Ks6KSA8T9QBS6eJHXiod64uy4v9WgD7M0/JV9fy6Rbvkm6WE85tJOc6Xt 3ifpz3+Cd7DLMVg656c1my5B+xD60DNOu/zjbv9t7PN2WU6er7Bvi9huKeCNeRPSJ2XO qQcg== X-Gm-Message-State: ALoCoQkPxhZP6GkFzwR2Ymfaloz1jFoTdc5E++eEXmoTsQfhB+3ez2DYbEBgNvBEn1hXi52dlslU MIME-Version: 1.0 X-Received: by 10.66.162.136 with SMTP id ya8mr9477313pab.110.1378992849681; Thu, 12 Sep 2013 06:34:09 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Thu, 12 Sep 2013 06:34:09 -0700 (PDT) In-Reply-To: References: Date: Thu, 12 Sep 2013 06:34:09 -0700 Message-ID: From: Xavier Vilajosana Guillen To: "Pascal Thubert (pthubert)" Content-Type: multipart/alternative; boundary=047d7b86e424f4133104e62fcadd Cc: Thomas Watteyne , 6TSCH <6tsch@ietf.org>, Qin Wang Subject: Re: [6tsch] Rank rounding error, churn and hysteresis [was Zero Objective Function discussion] X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Sep 2013 13:34:17 -0000 --047d7b86e424f4133104e62fcadd Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Pascal, I agree with you. In OpenWSN we have a stability counter that prevents changing the parent in case of little sudden variations, (avoiding hysteresis) and a mechanism to smooth rank increases, in case a node receives suddenly a very big rank from its parent. I also agree that little variations won't have an important effect. If you see here a problem we can try to simulate some scenarios and see what happens. cheers! Xavi On Thu, Sep 12, 2013 at 2:37 AM, Pascal Thubert (pthubert) < pthubert@cisco.com> wrote: > Hello Qin:**** > > ** ** > > In this particular case, a computation of DAGRank(rank) of 7 will prevent > this node from attaching to other nodes that are also at 7, and will > encourage more other nodes to attach to this. The end to end Rank > calculation for children is only slightly affected since the 2 byte rank = is > used for the total rank computation.**** > > ** ** > > I think that the rounding errors are part of the errors, just like the > stats of transmissions may vary.**** > > Depending on the representation of ETX in memory, you might also have > system that round to 1 decimal and others to 2 decimals and the same > calculation may still create a similar effect.**** > > ** ** > > Is that a big deal? Well, Considering the variations on the ETX > computation I do not think that this makes a lot of difference in the run > time.**** > > ** ** > > What is more critical is to use a good hysteresis so as to avoid jumping > over the integral boundary of DAGRank(rank) all the time.**** > > ** ** > > Both RFC 6552 and 6719 recommend you to do that, with RFC 6552 > dereferencing RFC 6719 that recommends to use a value boundary on Rank > before reparenting.**** > > http://tools.ietf.org/html/rfc6719#section-3.2.2 :**** > > ** ** > > 3. If the smallest path cost for paths through the candidate**** > > neighbors is smaller than cur_min_path_cost by less than**** > > PARENT_SWITCH_THRESHOLD, the node MAY continue to use the current*= * > ** > > preferred parent. This is the hysteresis component of MRHOF.**** > > ** ** > > RFC 6552 recommends by default to follow that guidance in > http://tools.ietf.org/html/rfc6552#section-4.1 **** > > ** ** > > it is thus**** > > RECOMMENDED to base the computation of the step_of_rank on dynamic**** > > link properties such as the expected transmission count (ETX) metric**= * > * > > as introduced in [DeCouto03] > and discussed in [RFC6551 ]. "Minimu= m > **** > > Rank Objective Function with Hysteresis" [HYSTERESIS] > provides**** > > guidance on how link cost can be computed and on how hysteresis can***= * > > improve Rank stability.**** > > ** ** > > Additional tuning or methods exist to increase stability. We can start > some work on that if we find that MRHOF=92s method is not sufficient in o= ur > case.**** > > ** ** > > One method (Cisco IPR there) consists in hiding limited variations of the > Rank to the children (around the last advertised 2 bytes value) until: **= * > * > > 1) a delta threshold is reached in the step of rank with parent (one-hop > hysteresis)**** > > or **** > > 2) Rank has to be recomputed because of the parent (the parent changes or > the Rank of the parent changes)**** > > ** ** > > This method creates a laser effect by which a number of new values of Ran= k > a recomputed and advertised as a single wave, whereby every node affected > by the change re-centers its rank value to its current moving average, > reducing the chances to hit condition 2) in the near future.**** > > ** ** > > What do you think?**** > > ** ** > > Pascal**** > > ** ** > > *From:* Qin Wang [mailto:qinwang@berkeley.edu] > *Sent:* mercredi 11 septembre 2013 23:58 > *To:* Pascal Thubert (pthubert) > *Cc:* xvilajosana@eecs.berkeley.edu; Thomas Watteyne; 6TSCH > *Subject:* Re: [6tsch] Zero Objective Function discussion**** > > ** ** > > Hi Pascal,**** > > ** ** > > I agree with your calculation. But, I have a small question.**** > > ** ** > > If you calculate with rank_increase=3D(2*xmit/ack)*256, instead > of rank_increase=3D(512*xmit/ack), then, you will get the result as follo= ws. > **** > > ** ** > > r(1)=3Dr(0)+2.66*256 =3D 2.66*256 =3D> DAGRank(rank) =3D 2*= *** > > r(2)=3Dr(1)+2.66*256=3D 5.32*256 =3D> DAGRank(rank) =3D 5= **** > > r(3)=3Dr(2)+2.66*256=3D7.98*256 =3D> DAGRank(rank) =3D 7= **** > > r(4)=3Dr(3)+2.66*256=3D10.64*256 =3D> DAGRank(rank) =3D 10= **** > > r(5)=3Dr(4)+2.66*256=3D13.30*256 =3D> DAGRank(rank) =3D 1= 3**** > > You can see r(3) is different from that in your calculation. Obviously, > the difference comes from different implementation. In another word, > following same OF, different implementation may lead to different Rank > value. Then, my question is if it is Ok while the motes from different > vendors work together in a DAG.**** > > Please point out if I'm wrong.**** > > Thanks**** > > Qin**** > > ** ** > > ** ** > > ** ** > > ** ** > > **** > > ** ** > > On Wed, Sep 11, 2013 at 3:08 AM, Pascal Thubert (pthubert) < > pthubert@cisco.com> wrote:**** > > Hello Xavi:**** > > **** > > Great!**** > > **** > > I=92d add the following:**** > > **** > > RFC 6550 3.5.1 . Ran= k Comparison (DAGRank())has:**** > > =93**** > > When an Objective Function computes Rank, the Objective Function**** > > operates on the entire (i.e., 16-bit) Rank quantity. When Rank is**** > > compared, e.g., for determination of parent relationships or loop**** > > detection, the integer portion of the Rank is to be used. The**** > > integer portion of the Rank is computed by the DAGRank() macro as**** > > follows, where floor(x) is the function that evaluates to the**** > > greatest integer less than or equal to x:**** > > **** > > DAGRank(rank) =3D floor(rank/MinHopRankIncrease)**** > > **** > > For example, if a 16-bit Rank quantity is decimal 27, and the**** > > MinHopRankIncrease is decimal 16, then DAGRank(27) =3D floor(1.6875) = =3D**** > > 1. The integer part of the Rank is 1 and the fractional part is**** > > 11/16.**** > > **** > > =93**** > > DAGRank(rank) is what we expect to place in the Flow label and the join > priority.**** > > In our case:**** > > **** > > r(1)=3Dr(0)+rank_increase =3D 0+683 =3D> DAGRank(rank) =3D = 2**** > > r(2)=3Dr(1)+683=3D1366 =3D> > DAGRank(rank) =3D 5**** > > r(3)=3Dr(2)+683=3D2049 =3D> > DAGRank(rank) =3D 8**** > > r(4)=3Dr(3)+683=3D2732 =3D> > DAGRank(rank) =3D 10**** > > r(5)=3Dr(4)+683=3D3415 =3D> > DAGRank(rank) =3D 13**** > > **** > > We see that the DAGRank() always increases at least by one. This is the > desired property so as to ensure that we can detect loop with just one > octet in the flow label.**** > > Note that the real 2 octets Rank does not lose the rounding info since th= e > DIP always passes 2 octets.**** > > **** > > Cheers,**** > > **** > > Pascal**** > > **** > > *From:* Xavier Vilajosana Guillen [mailto:xvilajosana@eecs.berkeley.edu] > *Sent:* mardi 10 septembre 2013 19:53 > *To:* Pascal Thubert (pthubert) > *Cc:* Thomas Watteyne; 6TSCH > *Subject:* Re: [6tsch] Zero Objective Function discussion**** > > **** > > Hi all, > > after some study I agree that we can use the RFC6552 in the minimal 6TiSC= H > configuration. I would like to call for approval or more input from other= s > before I consolidate the text in the draft. > > I put here an example following Pascal suggestion: > > Given > > Rf =3D 1 > Sp =3D 2* ETX > Sr =3D 0 > minHopRankIncrease =3D 256 (default in RPL)**** > > ETX=3D(xmit/ack)**** > > **** > > r(n) =3D r(p) + rank_increase > rank_increase=3D (Rf*Sp + Sr) * minHopRankIncrease **** > > rank_increase=3D(512*xmit/ack) > > > if we take 5 hops (95 are supported) network and r(0)=3D0 and xmit=3D100 = and > ack=3D75 for all nodes > > r(1)=3Dr(0)+rank_increase =3D 0+683 with f=3D0 > r(2)=3Dr(1)+683=3D1366 with f=3D1 > r(3)=3Dr(2)+683=3D2049 with f=3D2 > r(4)=3Dr(3)+683=3D2732 with f=3D2 > r(5)=3Dr(4)+683=3D3415 with f=3D3 > ... > etc... > > so f is monotonically increasing and the rank function enables more than > enough hops.**** > > Please provide feedback.**** > > cheers! > Xavi**** > > **** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > --047d7b86e424f4133104e62fcadd Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hi Pascal,

I agree with you. In OpenWSN we hav= e a stability counter that prevents changing the parent in case of little s= udden variations, (avoiding hysteresis) and a mechanism to smooth rank incr= eases, in case a node receives suddenly a very big rank from its parent.
I also agree that little variations won't have an import= ant effect. If you see here a problem we can try to simulate some scenarios= and see what happens.

cheers!
Xavi




On Thu, Sep 12, 2013 at 2:37 AM, Pascal Thubert (pthubert) <pthube= rt@cisco.com> wrote:

Hello Qin:

=A0<= /p>

In this particular case, = a computation of DAGRank(rank) of 7 will prevent this node from attaching t= o other nodes that are also at 7, and will encourage more other nodes to at= tach to this. The end to end Rank calculation for children is only slightly affected since the 2 byte rank is used for the total rank= computation.

=A0<= /p>

I think that the rounding= errors are part of the errors, just like the stats of transmissions may va= ry.

Depending on the represen= tation of ETX in memory, you might also have system that round to 1 decimal= and others to 2 decimals and the same calculation may still create a similar effect.

=A0<= /p>

Is that a big deal? Well,= Considering the variations on the ETX computation I do not think that this= makes a lot of difference in the run time.

=A0<= /p>

What is more critical is = to use a good hysteresis so as to avoid jumping over the integral boundary = of DAGRank(rank) all the time.

=A0<= /p>

Both RFC 6552 and 6719 recommend you to do that, with RFC 6= 552 dereferencing RFC 6719 that recommends to use a value boundary on Rank = before reparenting.

http://tools.ietf.org/html/rfc6719#= section-3.2.2 :

=A0<= /p>

=A0=A0 3.=A0 If the smallest path cost for paths through t= he candidate

=A0=A0=A0=A0=A0=A0 neighbors is smaller than cur_min_path_= cost by less than

=A0=A0=A0=A0=A0=A0 PARENT_SWITCH_THRESHOLD, the node MAY c= ontinue to use the current

=A0=A0=A0=A0=A0=A0 preferred parent.=A0 This is the hyster= esis component of MRHOF.

=A0<= /p>

RFC 6552 recommends by de= fault to follow that guidance in http://tools.ietf.org/html/rfc6552#section-4.1=

=A0<= /p>

=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 it is thus<= /p>

=A0=A0 RECOMMENDED to base the computation of the step_of_= rank on dynamic

=A0=A0 link properties such as the expected transmission c= ount (ETX) metric

=A0=A0 as introduced in [DeCouto03= ] and discussed in [RFC6551].=A0 "Minimum

=A0=A0 Rank Objective Function with Hysteresis" [HYSTERESIS] provides

=A0=A0 guidance on how link cost can be computed and on ho= w hysteresis can

=A0=A0 improve Rank stability.

=A0<= /p>

Additional tuning or meth= ods exist to increase stability. We can start some work on that if we find = that MRHOF=92s method is not sufficient in our case.

=A0<= /p>

One method (Cisco IPR the= re) consists in hiding limited variations of the Rank to the children (arou= nd the last advertised 2 bytes value) until:

1) a delta threshold is r= eached in the step of rank with parent (one-hop hysteresis)

or

2) Rank has to be recompu= ted because of the parent (the parent changes or the Rank of the parent cha= nges)

=A0<= /p>

This method creates a las= er effect by which a number of new values of Rank a recomputed and advertis= ed as a single wave, whereby every node affected by the change re-centers its rank value to its current moving average, reducing t= he chances to hit condition 2) in the near future.

=A0<= /p>

What do you think?=

=A0<= /p>

Pascal

=A0<= /p>

From: Qin Wang= [mailto:qinwang@= berkeley.edu]
Sent: mercredi 11 septembre 2013 23:58
To: Pascal Thubert (pthubert)
Cc: xvilajosana@eecs.berkeley.edu; Thomas Watteyne; 6TSCH
Subject: Re: [6tsch] Zero Objective Function discussion

=A0

Hi Pascal,

=A0

I agree with your calculation. But, I have a small q= uestion.

=A0

If you calculate with=A0rank_increase=3D(= 2*xmit/ack)*256, instead of=A0rank_increase=3D(512*xmit/ack), then, you wil= l get the result as follows.

=A0

r(1)=3Dr(0)+2.66*256 =3D = 2.66*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =3D> DAGRank(rank) =3D 2

r(2)=3Dr(1)+2.66*256=3D 5= .32*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0=A0=A0 =3D> DAGRank(rank) =3D 5

r(3)=3Dr(2)+2.66*256=3D7.= 98*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=3D> DAGRank(rank) =3D 7

r(4)=3Dr(3)+2.66*256=3D10= .64*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0=A0 =3D> DAGRank(rank) =3D 10<= span style=3D"font-size:10.0pt;font-family:"Arial","sans-ser= if"">

r(5)=3Dr(4)+2.66*256=3D13= .30*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0=A0=A0 =3D> DAGRank(rank) =3D 13

You can see r(3) is diffe= rent from that in your calculation. Obviously, the difference comes from different implementation. In another word, following same OF, different im= plementation may lead to different Rank value. Then, my question is if it i= s Ok while the motes from different vendors work together in a DAG.<= span style=3D"font-size:10.0pt;font-family:"Arial","sans-ser= if"">

Please point out if I'= ;m wrong.

Thanks=

Qin<= /u>

=A0

=A0

=A0

=A0

=A0

=A0

On Wed, Sep 11, 2013 at 3:08 AM, Pascal Thubert (pth= ubert) <pthubert= @cisco.com> wrote:

Hello Xavi:

=A0<= /p>

Great!

=A0<= /p>

I=92d add the following:<= /span>

=A0<= /p> 

RFC 6550 =A0=A0=A03.5.1. Ran=
k Comparison (DAGRank())has:

=93<= /p> 

When an Objective Function computes Rank, the Objective Function
=A0=A0 operates on the entire (i.e., 16-bit) Rank quantity.=A0 When Ra=
nk is
=A0=A0 compared, e.g., for determination of parent relationships or lo=
op
=A0=A0 detection, the integer portion of the Rank is to be used.=A0 Th=
e
=A0=A0 integer portion of the Rank is computed by the DAGRank() macro =
as
=A0=A0 follows, where floor(x) is the function that evaluates to the
=A0=A0 greatest integer less than or equal to x:
=A0
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 DAGRank(rank) =3D floor(rank/M=
inHopRankIncrease)
=A0
=A0=A0 For example, if a 16-bit Rank quantity is decimal 27, and the
=A0=A0 MinHopRankIncrease is decimal 16, then DAGRank(27) =3D floor(1.=
6875) =3D
=A0=A0 1.=A0 The integer part of the Rank is 1 and the fractional part=
 is
=A0=A0 11/16.

=A0<= /p>

=93<= /p>

DAGRank(rank) is what we = expect to place in the Flow label and the join priority.

In our case:

=A0<= /p>

r(1)=3Dr(0)+rank_increase= =3D 0+683 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) = =3D 2

r(2)=3Dr(1)+683=3D1366=A0= =A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) =3D 5

r(3)=3Dr(2)+683=3D2049=A0= =A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) =3D 8<= u>

r(4)=3Dr(3)+683=3D2732 = =A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) =3D 10

r(5)=3Dr(4)+683=3D3415=A0= =A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) =3D 13

=A0<= /p>

We see that the DAGRank()= always increases at least by one. This is the desired property so as to ensure that we can detect loop with just one octet in the flow label.

Note that the real 2 octe= ts Rank does not lose the rounding info since the DIP always passes 2 octet= s.

=A0<= /p>

Cheers,<= /u>

=A0<= /p>

Pascal=

=A0<= /p>

From: Xavier V= ilajosana Guillen [mailto:xvilajosana@eecs.berkeley.edu]
Sent: mardi 10 septembre 2013 19:53
To: Pascal Thubert (pthubert)
Cc: Thomas Watteyne; 6TSCH
Subject: Re: [6tsch] Zero Objective Function discussion

=A0

Hi all,

after some study I agree that we can use the RFC6552 in the minimal 6TiSCH = configuration. I would like to call for approval or more input from others = before I consolidate the text in the draft.

I put here an example following Pascal suggestion:

Given

Rf =3D 1
Sp =3D 2* ETX
Sr =3D 0
minHopRankIncrease =3D 256 (default in RPL)

ETX=3D(xmit/ack)

=A0

r(n) =3D r(p) + rank_increase
rank_increase=3D (Rf*Sp + Sr) * minHopRankIncrease

rank_increase=3D(512*= xmit/ack)


if we take 5 hops (95 are supported) network and r(0)=3D0 and xmit=3D100 an= d ack=3D75 for all nodes

r(1)=3Dr(0)+rank_increase =3D 0+683 with f=3D0
r(2)=3Dr(1)+683=3D1366 with f=3D1
r(3)=3Dr(2)+683=3D2049 with f=3D2
r(4)=3Dr(3)+683=3D2732 with f=3D2
r(5)=3Dr(4)+683=3D3415 with f=3D3
...
etc...

so f is monotonically increasing and the rank function enables more than en= ough hops.

Please provide feedba= ck.

cheers!
Xavi

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0


--047d7b86e424f4133104e62fcadd-- From twatteyne@gmail.com Thu Sep 12 10:58:58 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7BBA521F9F9D for <6tsch@ietfa.amsl.com>; Thu, 12 Sep 2013 10:58:58 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.411 X-Spam-Level: X-Spam-Status: No, score=-1.411 tagged_above=-999 required=5 tests=[AWL=0.566, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ffUNDX3GPrbO for <6tsch@ietfa.amsl.com>; Thu, 12 Sep 2013 10:58:57 -0700 (PDT) Received: from mail-pb0-x232.google.com (mail-pb0-x232.google.com [IPv6:2607:f8b0:400e:c01::232]) by ietfa.amsl.com (Postfix) with ESMTP id 55E9B11E820B for <6tsch@ietf.org>; Thu, 12 Sep 2013 10:58:34 -0700 (PDT) Received: by mail-pb0-f50.google.com with SMTP id uo5so129781pbc.37 for <6tsch@ietf.org>; Thu, 12 Sep 2013 10:58:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=jIbsn1T0gTI1TyRUG4LjHwutoS2DOpCPsZkatE9wzdo=; b=xPf4JEsF4D83YZyNlgj4qzIt2cjaeFWXew78SMeW0uV8XIA5ZbjhRq2RjAlGS6kdGQ dk6iWK5yoC12XsFY1J71dJ/9u02++ZGcGIlA99+F+aWwHuPUP1ZsQx6+bKeyYyrLBh8H Es1lLaSkeS9DnUgfTJIp3sFgfOjynb5T+DpRw4KGORjLETHCYepCCpmqw/HLlt6QjTKw ZPhYAaOF0jZD1V/tyKGGLkQmj1+L5rSXt3v/1YV2xOxI/6KlycK/gtymnjmyHcLGnoC8 wUVYZ2uh1lTVoDF/o/YjgP4zRTYGiJvBTWQrZmZQ5zv5wLjgxe8ZhvffsQu+e1ZBKEug 5Ktw== X-Received: by 10.66.121.201 with SMTP id lm9mr10753571pab.80.1379008714356; Thu, 12 Sep 2013 10:58:34 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Thu, 12 Sep 2013 10:58:14 -0700 (PDT) From: Thomas Watteyne Date: Thu, 12 Sep 2013 10:58:14 -0700 X-Google-Sender-Auth: NVpXQvNLUSCAzoBW6N682o6XCfI Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b2e4ca48fbedf04e6337cc2 Subject: [6tsch] Agenda webex 13 September 2013 X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Sep 2013 17:58:59 -0000 --047d7b2e4ca48fbedf04e6337cc2 Content-Type: text/plain; charset=ISO-8859-1 All, The goal of tomorrow's call is to get an update about the chartering process, explore the mechanisms CoAP offers and wrap up the discussion on the RPL in the minimal case. The proposed agenda is: - Administrivia [3min] - Approval agenda - Approval minutes last call - Chartering process [15min] - Updates to charter text - Process - CoAP [30min] - presentation [Raghuram,Xavi] - discussion - Rank rounding error, churn and hysteresis [10min] - Context and overview discussion [Pascal,Qin,Xavi] - discussion on hysteresis RFC6719 - AOB [2min] You will find a detailed agenda at https://bitbucket.org/6tsch/meetings/wiki/130913_webex. As usual, feel free to propose any changes to the agenda, also at the beginning of the call. Remember that this call will be recorded. Pascal & Thomas ---- Topic: 6TSCH Weekly Time: 8:00 am, Pacific Daylight Time (San Francisco, GMT-07:00) Meeting Number: 206 802 913 Meeting Password: sixtus ------------------------------------------------------- To start the online meeting ------------------------------------------------------- 1. Go to https://ciscosales.webex.com/ciscosales/j.php?ED=219615007&UID=481905242&PW=NZTRkNDAwOTE1&RT=MiMyMw%3D%3D 2. Log in to your account. 3. Click "Start Now". 4. Follow the instructions that appear on your screen. ---------------------------------------------------------------- ALERT:Toll-Free Dial Restrictions for (408) and (919) Area Codes ---------------------------------------------------------------- The affected toll free numbers are: (866) 432-9903 for the San Jose/Milpitas area and (866) 349-3520 for the RTP area. Please dial the local access number for your area from the list below: - San Jose/Milpitas (408) area: 525-6800 - RTP (919) area: 392-3330 ------------------------------------------------------- To join the teleconference only ------------------------------------------------------- 1. Dial into Cisco WebEx (view all Global Access Numbers at http://cisco.com/en/US/about/doing_business/conferencing/index.html 2. Follow the prompts to enter the Meeting Number (listed above) or Access Code followed by the # sign. San Jose, CA: +1.408.525.6800 RTP: +1.919.392.3330 US/Canada: +1.866.432.9903 United Kingdom: +44.20.8824.0117 India: +91.80.4350.1111 Germany: +49.619.6773.9002 Japan: +81.3.5763.9394 China: +86.10.8515.5666 To check whether you have the appropriate players installed for UCF (Universal Communications Format) rich media files, go to https://ciscosales.webex.com/ciscosales/systemdiagnosis.php http://www.webex.com CCM:+14085256800x206802913 --047d7b2e4ca48fbedf04e6337cc2 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
All,

The goal of tomorrow= 9;s call is to get an update about the chartering process, explore the mech= anisms CoAP offers and wrap up the discussion on the RPL in the minimal cas= e.

The proposed agenda is:
  • Administrivia= [3min]
    • Approval agenda
    • Approval minutes last call<= /li>
  • Chartering process [15min]
    • Updates to charter = text
    • Process
  • CoAP [30min]
    • presentation [Raghura= m,Xavi]
    • discussion
  • Rank rounding error, churn and hyst= eresis [10min]
    • Context and overview discussion [Pascal,Qin,= Xavi]
    • discussion on hysteresis RFC6719
  • AOB [2min]
<= /div>
You will find a detailed agenda at=A0https://bitbucket.org/6tsch/meetings= /wiki/130913_webex.

As usual, feel free to propose any changes to the agend= a, also at the beginning of the call.

Remember tha= t this call will be recorded.

Pascal & Thomas<= /div>

----

Topic: 6TSCH Weekly
=
Time: 8:00 am, Pacific Daylight Time (San Francisco, GMT-07:00)=A0
Meeting Number: 206 802 913=A0
Meeting Password: sixtus=A0=

-------------------------------------------------------= =A0
To start the online meeting=A0
--------------------= -----------------------------------=A0
2. Log in to your account.=A0
3. Click "Start Now"= .=A0
4. Follow the instructions that appear on your screen.=A0

----------------------------------------------------= ------------=A0
ALERT:Toll-Free Dial Restrictions for (408) and (919) Area Codes=A0
----------------------------------------------------------------=A0=

The affected toll free numbers are: (866) 432-9903 for the San Jose/Milpitas area and (866) 349-3520 for the RTP area.=A0

Please dial the local access number for your area from = the list below:=A0
- San Jose/Milpitas (408) area: 525-6800=A0
- RTP (919) area: 392-3330=A0

------------= -------------------------------------------=A0
To join the teleconference only=A0
-------------------------= ------------------------------=A0
1. Dial into Cisco WebEx (view = all Global Access Numbers at=A0
2. Follow the prompts to enter the Meeting Number (listed above) or Ac= cess Code followed by the # sign.=A0

San Jose, CA:= +1.40= 8.525.6800 RTP: +1.919.392.3330=A0

US/Canada: +1.866.432.9903 United Kingdom: +44.20.8824= .0117=A0

India: +91.80.4350.1111 Germany: +49.619.= 6773.9002=A0

Japan: +81.3.5763.9394 China: +86.10.8515.5666=A0
=

To check whether you have the appropriate players insta= lled for UCF (Universal Communications Format) rich media files, go to https:/= /ciscosales.webex.com/ciscosales/systemdiagnosis.php=A0


--047d7b2e4ca48fbedf04e6337cc2-- From twatteyne@gmail.com Thu Sep 12 17:49:13 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id EBDA511E80C5 for <6tsch@ietfa.amsl.com>; Thu, 12 Sep 2013 17:49:13 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0 X-Spam-Level: X-Spam-Status: No, score=x tagged_above=-999 required=5 tests=[] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GE1jGm3lrgbY for <6tsch@ietfa.amsl.com>; Thu, 12 Sep 2013 17:49:13 -0700 (PDT) Received: from mail-pd0-x233.google.com (mail-pd0-x233.google.com [IPv6:2607:f8b0:400e:c02::233]) by ietfa.amsl.com (Postfix) with ESMTP id 199CB11E815B for <6tsch@ietf.org>; Thu, 12 Sep 2013 17:49:11 -0700 (PDT) Received: by mail-pd0-f179.google.com with SMTP id v10so531801pde.10 for <6tsch@ietf.org>; Thu, 12 Sep 2013 17:49:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=v1vRJcJ+jzJ+l53v8uwfg3FGbgwsomO52aOH5lUd4Zw=; b=CIolYjSGFJ1wBIeyXOx4XKhScjYMnycrNIlrnziAopDkCFL2D5e39MDE04gJ0KUtLA lHQ8U6kpstVnkdwkxSKsMP0xojKyhbwt/I0Z5RMoyY0knJ2gJV94e1Oh5moK/btvdvNk pceTNT3d9f1CneYLHGLkdDfracLTqZ/j1/nzxUo/yodAEtZDvwFnOo+6w5h+Cr5uV3S7 WyvEgCf9XAmXm6gGxazu7zzoHfRSXSppgrjmRORXG4hbFS9LlNnUhS3NaIx+p4HVtrkz VZ1tThL37VlDzG1N1YBoPigBlNGLXRCNPQtJ/NDrzAXv07xlitUvdyYyV0hgAWw54gOT 9bNw== X-Received: by 10.66.228.38 with SMTP id sf6mr12437005pac.21.1379033351074; Thu, 12 Sep 2013 17:49:11 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Thu, 12 Sep 2013 17:48:49 -0700 (PDT) In-Reply-To: <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> From: Thomas Watteyne Date: Thu, 12 Sep 2013 17:48:49 -0700 X-Google-Sender-Auth: i2b_zBRmSGR86NrnE6SckMMi6Jk Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/related; boundary=047d7b11201b063aa204e6393904 Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 00:49:14 -0000 --047d7b11201b063aa204e6393904 Content-Type: multipart/alternative; boundary=047d7b11201b063a9f04e6393903 --047d7b11201b063a9f04e6393903 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Pouria, Thanks again for the overview, which complements your first document nicely= . Alfredo, Could you please elaborate what you mean by in-network processing? Are you referring to a distributed way for the nodes to "consume" this data, some fusion as the data trickles up the DAG, or something else? Thomas On Thu, Sep 12, 2013 at 12:34 AM, Alfredo Grieco wrote: > Hi All,**** > > ** ** > > Do you think is it feasible to add a bit/flag that allows some form of > in-network processing ? **** > > ** ** > > This would be very useful to distributed/decentralized scheduling > techniques and should not cost that much.**** > > ** ** > > Any thoughts is welcome.**** > > ** ** > > Cheers**** > > ** ** > > Alfredo**** > > ** ** > > *Da:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *Per conto > di *P.Zand@utwente.nl > *Inviato:* Wednesday, September 11, 2013 10:45 PM > *A:* xvilajosana@eecs.berkeley.edu; watteyne@eecs.berkeley.edu > *Cc:* 6tsch@ietf.org > *Oggetto:* Re: [6tsch] report flow contents**** > > ** ** > > Thomas,**** > > I agree with you that "source route failed" and "graph route failed" are > out of scope of 6TiSCH.**** > > Regarding to you question about the per-channel report, I think they are > based on each radio channel supported by the specification (channel 11-26 > in 2.4GHz in IEEE 802.15.4), not channel offset. And a channel report > generated for all neighbor.**** > > Regarding to your first question, let me now explain more. I think both o= f > these standard provide a mechanisms to make it possible for System/Networ= k > Manager to also read (pull) desired attributes (But not all the feature i= n > 6TiSCH). For example in WirelessHART [1], by =93Report Neighbor Health Li= st=94 > request, the network manager might mention the number of neighbors to be > read in =93Number of Neighbor entries read=94 field.. **** > > I think, ISA100.11a provides more mechanisms for System manager to get th= e > desired attributes from the field devices. And the first two features tha= t > you mentioned might also be supported by ISA100.11a.**** > > In ISA100.11a, three mechanisms are provided for reporting diagnostic > information contained in dlmo.NeighborDiag (described in section 1 later) > and dlmo.ChannelDiag (described in Section 2 later):**** > > 1. The health reports concentrator object (HRCO), can be configured to > report any attribute in the DL *on a* *periodic basis*. > dlmo.NeighborDiag entries (shown in Table 2) and dlmo.ChannelDiag (sho= wn in > Table 5) can be reported through that mechanism. Through the HRCO, the > system manager can configure the device to report NeighborDiag > periodically, such as every 30 minutes. Following each such report, on= a > per-entry basis, NeighborDiag counts shall be reset to zero. Levels sh= all > use the current value as a starting point for the next period [2].**** > 2. Diagnostic information can be retrieved at any time by the system > manager, by reading the applicable attributes. The system manager can = read > (poll) NeighborDiag as a read-only attribute *on a per-entry basis*. > As in an HRCO report, counts shall be reset to zero when read [2].**** > 3. Diagnostic information can be reported by the DL on *an exception > basis*, through the DL_Connectivity alert (Described in section 3(a)). > The DL can additionally be configured, through the dlmo.AlertPolicy > attribute (shown in Table 6), to report NeighborDiag information when > diagnostic values exceed a threshold. Only the row triggering the aler= t is > reported. No values are reset [2]. **** > > ** ** > > In ISA100.11a, the system manager establishes a DL communication > relationship between a device and its neighbor by adding an entry to the > device=92s dlmo.Neighbor attribute (see Table 1). Each such entry specifi= es a > level of diagnostics to be collected, through the field > dlmo.Neighbor[].DiagLevel. For each neighbor, diagnostics may be collecte= d > at a baseline level, or a detailed level including clock diagnostics [2]. > This levels are described in Section 1.**** > > *Table **1. dlmo.Neighbor fields [2]* > > *Field name* > > *Field encoding* > > * Index (16-bit address of neighbor)**** > > ExtDlUint (used as an index)**** > > EUI64 (EUI-64 identifier of the neighbor)**** > > Type: Unsigned64**** > > =85**** > > =85**** > > *DiagLevel* (selection of neighbor diagnostics to collect)**** > > Type: Unsigned2**** > > Bit0 =3D 1 Collect link diagnostics**** > > Bit1 =3D 1 Collect clock diagnostics**** > > =85**** > > =85**** > > ** ** > > When the dlmo.Neighbor[].DiagLevel field is set for a particular neighbor= , > the DL shall create corresponding entries in the read-only attribute > dlmo.NeighborDiag. NeighborDiag values are accumulated from the time that > the dlmo.NeighborDiag entry is created [2].**** > > ***1. ****dlmo.NeighborDiag:* > > dlmo.NeighborDiag is an indexed OctetString collection that contains > diagnostics for a set of neighbors. The attribute is read-only, with rows > created as needed by the DL [2].**** > > NeighborDiag entries are instantiated by the system manager, by setting > dlmo.Neighbor[].DiagLevel bits to non-zero values. Iff (if and only if) > Bit0=3D1, then summary diagnostics shall be collected for the neighbor, > consolidated across all channels. Iff Bit1=3D1, then detailed clock > diagnostics shall be collected for the neighbor, consolidated across all > radio channels [2].**** > > *Table **2. dlmo.NeighborDiag fields [2]* > > Field name**** > > Field encoding**** > > * Index**** > > Type: ExtDlUint (neighbor address, used as an index)**** > > *Summary* > > Type: OctetString (see Table 3)**** > > *ClockDetail* > > Type: OctetString (see Table 4)**** > > ** ** > > *Table **3. Diagnostic Summary OctetString fields [2]* > > Field name**** > > Field encoding**** > > RSSI (level)**** > > Type: Integer8**** > > RSQI (level)**** > > Type: Unsigned8**** > > RxDPDU (count)**** > > Type: ExtDlUint**** > > TxSuccessful (count)**** > > Type: ExtDlUint**** > > TxFailed (count)**** > > Type: ExtDlUint**** > > TxCCA_Backoff (count)**** > > Type: ExtDlUint**** > > TxNACK (count)**** > > Type: ExtDlUint**** > > ClockSigma (level)**** > > Type: Integer16**** > > ** ** > > *Table **4. Diagnostic ClockDetail OctetString fields [2]* > > Field name**** > > Field encoding**** > > ClockBias (level, signed)**** > > Type: Integer16**** > > ClockCount (count)**** > > Type: ExtDlUint**** > > ClockTimeout (count)**** > > Type: ExtDlUint**** > > ClockOutliers (count)**** > > Type: ExtDlUint**** > > ** ** > > **2. ***dlmo.ChannelDiag*:**** > > dlmo.ChannelDiag is a read-only dynamic attribute that reports DPDU > transmit failure rates on each radio channel supported by the > specification. This enables the system manager to be aware of consistent > connectivity problems on a per-channel basis, as a diagnostic for spectru= m > management in a subnet [2].**** > > Two diagnostics are reported for each channel, each indicating a differen= t > type of failure. **** indicates the percentage of time that unicast DPDU > transmissions on channel N did not receive an ACK or a NACK. ****indicate= s the percentage of time that unicast DPDU transmissions on channel > N were aborted due to CCA. [2]**** > > *Table **5. dlmo.ChannelDiag fields* > > Field name**** > > Field encoding**** > > Count (Number of attempted unicast transmissions for all channels)**** > > Type:Unsigned16**** > > **** (Percentage of time transmissions on channel 0 did not receive an > ACK)**** > > Type: Integer8**** > > **** (Percentage of time transmissions on channel 0 aborted due to CCA)**= * > * > > Type: Integer8**** > > =85**** > > ** ** > > **** (Percentage of time transmissions on channel 15 did not receive an > ACK)**** > > Type: Integer8**** > > **** (Percentage of time transmissions on channel 15 aborted due to CCA)*= * > ** > > Type: Integer8**** > > ** ** > > ***3. ****Data link layer alerts* > > 1. *DL_Connectivity alert* > > DL performance diagnostics are accumulated in the attributes > dlmo.NeighborDiag for *per-neighbor* diagnostics, and dlmo.ChannelDiag > for *per-channel* diagnostics. Normally the system manager configures the > HRCO to report these diagnostics periodically, and the DL automatically > resets the diagnostic counters whenever these attributes are so reported. > Between such reports, diagnostics may indicate a problem that needs to be > reported to the system manager immediately. The DL_Connectivity alert > provides the mechanism for the DL to report such issues, and the > dlmo.AlertPolicy attribute enables the system manager to set thresholds f= or > such reporting [2].**** > > The attribute dlmo.AlertPolicy enables/disables the DL_Connectivity alert > and provides thresholds to control whether alerts are reported. > dlmo.AlertPolicy is an OctetString containing fields as shown in Table 6 > [2].**** > > *Table **6. dlmo.AlertPolicy fields* > > Field name**** > > Field scalar type**** > > Descriptor (Enables or disabled the DL_Connectivity alert.)**** > > Type Alert report descriptor**** > > NeiMinUnicast (Minimum number of unicast transactions needed for a > neighbor report.)**** > > Type: ExtDlUint**** > > NeiErrThresh (Report neighbor diagnostic if the percentage error rate > reaches this threshold )**** > > Type: Unsigned8**** > > ChanMinUnicast (Minimum number of unicast transactions on a channel neede= d > as a pre-condition for triggering an alert.)**** > > Type: ExtDlUint**** > > NoAckThresh (Report ChannelDiag if a NoAck value is greater than this > threshold)**** > > Type: Unsigned8**** > > CCABackoffThresh (Report ChannelDiag if a CCABackoff value is greater tha= n > this threshold)**** > > Type: Unsigned8**** > > ** ** > > 1. *NeighborDiscovery alert*** > > The NeighborDiscovery alert provides a mechanism for the DL to report the > contents of the OctetString in dlmo.Candidates attribute (see Table 7).**= * > * > > The neighbors in the dlmo.Neighbor attribute are set by the system > manager, not by the device itself. The DL autonomously builds a list of > candidate neighbors in the dlmo.Candidates attribute. This list is then > forwarded to the system manager. The system manager considers the radio > connectivity that is reported in dlmo.Candidates, but may also consider > other criteria such as resource constraints, historical performance, or > subnet topology [2].**** > > *Table **7. dlmo.Candidates OctetString fields* > > Field name**** > > Field encoding**** > > N (count of discovered neighbors)**** > > Type: Unsigned8**** > > Neighbor1 (16-bit address of first candidate)**** > > Type: ExtDlUint**** > > RSSI1 (radio signal quality of first candidate)**** > > Type: Integer8**** > > RSQI1 (radio signal quality of first candidate)**** > > Type: Unsigned8**** > > etc=85**** > > ** ** > > NeighborN (16-bit address of Nth candidate)**** > > Type: ExtDlUint**** > > RSSIN (radio signal quality of Nth candidate)**** > > Type: Integer8**** > > RSQIN (radio signal quality of Nth candidate)**** > > Type: Unsigned8**** > > ** ** > > *References* > > 1. IEC 62591: Industrial Communication Networks - Wireless > Communication Network and Communication Profiles - WirelessHART.**** > > ** ** > > 2. IEC 62734: Industrial communication networks - Fieldbus > specifications - Wireless systems for industrial automation: process > control and related applications - ISA100.11a.**** > > ** ** > > ** ** > > *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On Behalf > Of *Xavier Vilajosana Guillen > *Sent:* Wednesday, September 11, 2013 8:54 PM > *To:* Thomas Watteyne > *Cc:* 6TSCH > *Subject:* Re: [6tsch] report flow contents**** > > ** ** > > Hi Thomas, **** > > my 5 cents.**** > > I agree on adding NACK information and timing differences with other than > time source parent neighbors. I will add to the wiki :-)**** > > As regards to the differences of what we do at 6TiSCH and WHart or > ISA100.11a, our proposal is more flexible and has less cohesion with a co= st > of increased complexity (e.g configurable data and reporting period). We > have to analyse carefully what are the implications in terms of protocol > complexity and implementation of that mechanism versus how often they wou= ld > be used. Could we maybe define some "templates" or default configurations > so using the 6TiSCH can be done without configuration overhead? Then > configuration can be used for those that are really interested on tuning > their system. **** > > just thoughts.. > X**** > > ** ** > > ** ** > > On Wed, Sep 11, 2013 at 9:58 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > Pouria,**** > > ** ** > > Wonderful list.**** > > ** ** > > Your document clearly highlights that (1) the "report" flows both in > WirelessHART and ISA100.11a are strictly periodic and (1) they have a fix= ed > format. From what we have discussed so far, the solutions we are developi= ng > is different in the following ways:**** > > - 6TiSCH offers a mechanism allowing the PCE to configure what data it > want to receive, and configure the trigger for a node to generate from= data. > **** > - 6TiSCH offers a mechanism allowing the PCE to query the data, on top > of having the nodes push the information**** > - In 6TiSCH, the format of the payload is not fixed. In particular, it > is possible to add application-specific fields, allowing for extension= s. > **** > - In 6TiSCH, the transport (CoAP?) and formatting (CBOR?) are > IETF-friendly and integrate well in the IPv6 stack and associated mech= anisms > **** > > Did I get that right?**** > > ** ** > > A couple of questions:**** > > - the WirelessHART "alarms" correspond to a 6TiSCH "events". Yet, I > suppose that a "source route failed" and "graph route failed" are out = of > scope of 6TiSCH, but rather part of RPL. I would expect those to the I= CMPv6 > messages. Thoughts?**** > - About the per-channel report, I assume this is "per frequency", > right? Is a channel report generated for each neighbor?**** > - When comparing your list to *Xavi*'s > https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents:**** > > > - we might want to add a "numNACK" counter to the neighbor information= * > *** > - we might want to keep timing statistics for all neighbors, not > just time source parents. That is, when I receive a packet from a n= eighbor > which is not my time source neighbor, I do not change my clock, but= I still > know the timing error.**** > > Thomas**** > > ** ** > > On Wed, Sep 11, 2013 at 7:18 AM, wrote:**** > > Dear All,**** > > In the following, I listed the performance metrics reported to the > Network/System Manager in WirelessHART and ISA100.11a.**** > > Some reports still need be added, for example the path failure alerts in > ISA100.11a.**** > > Pouria**** > > **** > > *WirelessHART performance metrics***** > > In WirelessHART[1] network the statistics and events are reported to the > Network Manager (act like PCE in 6TiSCH) through the following commands:*= * > ** > > 1. Report =93Device Health=94 **** > > This report is sent periodically toward the Network Manager. The report > summaries the communication statistics of a device.**** > > Byte**** > > Format**** > > Description**** > > 0-1**** > > Unsigned-16**** > > Number of packets generated by this device since last report**** > > 2-3**** > > Unsigned-16**** > > Number of packets terminated by this device since last report**** > > 4**** > > Unsigned-8**** > > Number of Data-Link Layer MAC MIC failures detected**** > > 5**** > > Unsigned-8**** > > Number of Network Layer (Session) MIC failures detected**** > > 6**** > > Enum-8**** > > Power Status**** > > 7**** > > Unsigned-8**** > > Number of CRC Errors detected**** > > **** > > 1. Report =93Neighbor Health List=94 **** > > This report is sent periodically toward the Network Manager. The report > includes the statistics of linked neighbors.**** > > Byte**** > > Format**** > > Description**** > > 0**** > > Unsigned-8**** > > Neighbor table index**** > > 1**** > > Unsigned-8**** > > Number of Neighbor entries read**** > > 2**** > > Unsigned-8**** > > Total number of neighbors**** > > 3-4**** > > Unsigned-16**** > > Nickname of neighbor**** > > 5**** > > Bit-8**** > > Neighbor Flags**** > > 6**** > > Signed-8**** > > Mean RSL (Receive Signal Level in dBm) since last report**** > > 7-8**** > > Unsigned-16**** > > Number of Packets transmitted to this neighbor**** > > 9-10**** > > Unsigned-16**** > > Number of Packets received from this neighbor**** > > 11-12**** > > Unsigned-16**** > > Packets received from this neighbor**** > > 13-=85**** > > **** > > Number of entries based on response byte 1**** > > **** > > 1. Report =93Neighbor Signal Levels=94**** > > This report is sent periodically toward the Network Manager. The report > includes the statistics of discovered (but not linked) neighbors. These > neighbors might be discovered when a device has heard the neighbor > communication in the discovery links. A device that wish to join a networ= k, > send a join request to the Network manager, including this report.**** > > Byte**** > > Format**** > > Description**** > > 0**** > > Unsigned-8**** > > Neighbor table index**** > > 1**** > > Unsigned-8**** > > Number of Neighbor entries read**** > > 2**** > > Unsigned-8**** > > Total number of neighbors**** > > 3-4**** > > Unsigned-16**** > > Nickname of neighbor**** > > 5**** > > Signed-8**** > > RSL of neighbor in dB**** > > 6-8**** > > **** > > Repeats (as needed) based on response byte 1**** > > **** > > 1. Alarm =93Path Down=94 **** > > The alarm is sent upon detecting a path failure. **** > > Byte**** > > Format**** > > Description**** > > 0-1**** > > Unsigned-16**** > > Nickname of neighbor to which path failure was detected**** > > **** > > 1. Alarm "Source Route Failed"**** > > This alarm is sent upon detecting a source route failure.**** > > Byte**** > > Format**** > > Description**** > > 0-1**** > > Unsigned-16**** > > Nickname of unreachable neighbor in the source route**** > > 2-5**** > > Unsigned-32**** > > Network-Layer MIC (i.e., the MIC generated using the session key) from th= e > NPDU that failed routing**** > > **** > > 1. Alarm "Graph Route Failed"**** > > This alarm is sent upon detecting a graph route failure.**** > > Byte**** > > Format**** > > Description**** > > 0-1**** > > Unsigned-16**** > > Graph Id of the failed route**** > > **** > > > **** > > **** > > *ISA100.11a performance metric***** > > In ISA100.11a[2], the L2 performance metrics are reported to the System > Manager (act like PCE in 6TiSCH) and can be classified into (1) > DL_Connectivity alert and (2) NeighborDiscovery alert.**** > > 1. DL_Connectivity alert**** > > The DL_connectivity alert can be classified into (a) Per-neighbor reports > and (b) Per-channel reports. **** > > - *Per-neighbor report***** > > Per-neighbor reports are the performance metrics about the neighbors > connection and are reported to the System Manager. These statistics are > accumulated in the =93dlmo.NeighborDiag=94 attribute, for each neighbor. = This > report is similar to =93Neighbor Health List=94 report in WirelessHART. *= *** > > Each node in ISA100.11a might be asked to report the following statistics > about its neighbor:**** > > **** > > Octets**** > > Format**** > > Description**** > > 1**** > > Signed-8**** > > RSSI (level)**** > > 1**** > > Unsigned-8**** > > RSQI (level)**** > > 1-2**** > > ExtDLUint**** > > RxDPDU(count): Number of valid Packets received from this neighbor **** > > 1-2**** > > ExtDLUint**** > > TxSuccessful (count):Count of successful unicast transmissions to the > neighbor **** > > 1-2**** > > ExtDLUint**** > > TxFailed (count): Number of unicast transmission, without getting any AC= K > or NACK**** > > 1-2**** > > ExtDLUint**** > > TxCCA_Backoff (count): Number of unicast transmission aborted due to CCA*= * > ** > > 1-2**** > > ExtDLUint**** > > TxNACK (count): Number of NACKs received**** > > 2**** > > Signed-16**** > > ClockSigma (level): A rough estimate of standard deviation of clock > corrections**** > > **** > > - *Per-channel report***** > > In addition, in ISA100.11a, several performance metrics are reported base= d > on channel for all neighbors to the System Manager. These statistics are > accumulated in the =93dlmo.ChannelDiag=94 attribute. This report is simil= ar to > =93Device Health=94 report in WirelessHART.**** > > Byte**** > > Format**** > > Description**** > > 0-2**** > > Unsigned-16**** > > Count (Number of attempted unicast transmissions for all channels)**** > > 3**** > > Integer-8**** > > (Percentage of time transmissions on channel 0 did not receive an ACK)***= * > > 4**** > > Integer-8**** > > (Percentage of time transmissions on channel 0 aborted due to CCA)**** > > =85**** > > **** > > **** > > 33**** > > Integer-8**** > > (Percentage of time transmissions on channel 15 did not receive an ACK)**= * > * > > 34**** > > Integer-8**** > > (Percentage of time transmissions on channel 15 aborted due to CCA)**** > > **** > > 1. NeighborDiscovery alert**** > > In ISA100.11a, each node sends a report, including a list of candidate > (overheard) neighbors, to the System Manager to make a potential new > routing decisions. The =93dlmo.Candidates=94 attributed is used to store = those > information in each node in the L2. This report is similar to the =93Neig= hbor > Signal Levels=94 report in WirelessHART.**** > > Octets**** > > Format**** > > Description**** > > 1**** > > Unsigned-8**** > > N (count of discovered neighbors)**** > > 0-2**** > > ExtDlUint**** > > address**** > > 0-1**** > > Signed-8**** > > **** > > 0-1**** > > Unsigned-8**** > > **** > > =85**** > > **** > > **** > > 0-2**** > > ExtDlUint**** > > address**** > > 0-1**** > > Signed-8**** > > **** > > 0-1**** > > Unsigned-8**** > > **** > > **** > > * ***** > > *References***** > > 1. IEC 62591: Industrial Communication Networks - Wireless > Communication Network and Communication Profiles - WirelessHART.**** > > **** > > 2. IEC 62734: Industrial communication networks - Fieldbus > specifications - Wireless systems for industrial automation: process > control and related applications - ISA100.11a.**** > > **** > > **** > > **** > > *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On Behalf > Of *Thomas Watteyne > *Sent:* Saturday, September 07, 2013 7:43 PM > *To:* Xavi Vilajosana > *Cc:* Pascal Thubert (pthubert); 6tsch@ietf.org > *Subject:* Re: [6tsch] report flow contents**** > > **** > > Xavi,**** > > Great, thanks!**** > > Thomas**** > > **** > > On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote:**** > > Hi, > I created the scratchpad section in the wiki to keep ideas > https://bitbucket.org/6tsch/meetings/wiki/Home > > > and added the flow content information here. > > https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents**** > > have a nice weekend!**** > > X**** > > **** > > On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote:**** > > Hi Pascal, it is a good idea!**** > > I will collect that information and as Thomas put it at the wiki so we do > not lose it. > > :-)**** > > X**** > > **** > > On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) < > pthubert@cisco.com> wrote:**** > > Hello Xavi:**** > > **** > > At the call I mentioned we could use info on tracks and cells as well, > probably on demand from the PCE.**** > > For instance, the PCE could observe energy levels over some cells for a > while to make sure they are clean.**** > > **** > > What do you think?**** > > Pascal**** > > **** > > *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On Behalf > Of *Xavier Vilajosana Guillen > *Sent:* vendredi 6 septembre 2013 01:17 > *To:* Thomas Watteyne > *Cc:* 6tsch@ietf.org > *Subject:* Re: [6tsch] report flow contents**** > > **** > > agreed!**** > > So the fields become:**** > > **** > > **** > > For each known neighbor:**** > > -ID**** > > -AVG RSSI in a running window**** > > -Latest RSSI**** > > -AVG LQI in a running window [optional]**** > > -Latest LQI [optional]**** > > -Num TX packets (option in case there is communication with that neighbo= r) > **** > > -Num ACK packets (option in case there is communication with that > neighbor)**** > > -Num RX packets (option in case there is communication with that neighbo= r) > **** > > -Last ASN when it heart about that neighbor **** > > -Bundle: Num links in the Schedule to that neighbor**** > > -PDR per link [Optional -- or maybe best and worst PDR only]**** > > **** > > -Option Flag (weather there are optional TLV fields on that category)***= * > > +(TLV objects)* **** > > **** > > -For each Queue:**** > > - Avg Queue length in a running window**** > > - Max Queue length in a running window (peak)**** > > - Current Queue length (?)**** > > - ASN of the oldest packet in the QUEUE?**** > > -Option Flag (weather there are optional TLV fields on that category)= * > *** > > +(TLV objects)* **** > > **** > > -Time source parent**** > > -ID**** > > -Avg clock drift (correction done) in a running window**** > > -Latest clock correction**** > > -Parent changes (counter of how many times I changed my time source > parent)**** > > -Option Flag (weather there are optional TLV fields on that category)= * > *** > > +(TLV objects)* **** > > **** > > -Option Flag (weather there are optional TLV fields in other categories)*= * > ** > > +(TLV objects)* **** > > **** > > as regards to this:**** > > **** > > "Finally, do you envision a generic mechanism whereby the PCE can turn > fields on/off, or triggered independently?"**** > > **** > > I see it as CoAP Options, where a set of bytes can be used as "clever > bitmap" to tell what options are there, the parsing will decode option by > option and will read the fields. In that way any combination of fields is > supported.**** > > **** > > would that work?**** > > X**** > > **** > > On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > Xavi,**** > > **** > > Fantastic!**** > > **** > > I believe PDR for each link might be too long to fit in a packet. While > the mote will most likely keep that information, we could move that to th= e > query flow, i.e. it is available to the PCE on-demand.**** > > **** > > Would you agree that the number of links in a bundle belongs to the > neighbor? Of maybe we want a "bundle" category?**** > > **** > > In queuing, it might be interesting to see the age of the different > packets, to be able to monitor latency.**** > > **** > > About LQI, there is no general consensus among vendors on what the > definition is, or how exactly it is calculated. I would make it optional.= * > *** > > **** > > Also, it might be good to be able to add arbitrary fields to each > category: neighbor, queue, time source neighbor.**** > > **** > > Finally, do you envision a generic mechanism whereby the PCE can turn > fields on/off, or triggered independently?**** > > **** > > Thomas**** > > **** > > On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote:**** > > Hi Thomas, Diego,**** > > **** > > I agree that LQI should be there as well. I update here the list with > Thomas suggestions. **** > > **** > > For each known neighbor:**** > > -ID**** > > -AVG RSSI in a running window**** > > -Latest RSSI**** > > -AVG LQI in a running window**** > > -Latest LQI**** > > -Num TX packets (option in case there is communication with that neighbo= r) > **** > > -Num ACK packets (option in case there is communication with that > neighbor)**** > > -Num RX packets (option in case there is communication with that neighbo= r) > **** > > -Last ASN when it heart about that neighbor **** > > **** > > Other fields**** > > -Num links in the Schedule to that neighbor**** > > -For each link PDR**** > > -For each Queue:**** > > - Avg Queue length in a running window**** > > - Max Queue length in a running window (peak)**** > > - Current Queue length (?)**** > > -Time source parent**** > > -ID**** > > -Avg clock drift (correction done) in a running window**** > > -Latest clock correction**** > > -Parent changes (counter of how many times I changed my time source > parent)**** > > **** > > -Option Flag (weather there are optional TLV fields)**** > > +(TLV objects)* **** > > **** > > **** > > Hope this makes sense.**** > > cheers! > Xavi**** > > **** > > On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote:**** > > *[renamed thread]***** > > **** > > Xavi,**** > > **** > > A few thoughts:**** > > - the counters (numTx, etc) will only be present for neighbors the node > has communicate with, so they should be optional in the packet.**** > > - you have focused on the topological information (which I think is the > right one). It might be useful to gather other data related to > synchronization or queuing.**** > > - I couldn't agree more with your suggestion to make it extensible. This > does mean that we will need to state somewhere that a device need to igno= re > silently fields it does not understand.**** > > **** > > Thomas**** > > **** > > On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote:**** > > Hello, I guess that flows are getting defined and I started to think on > the contents of the messages on that flows. Not sure if this is the right > time or I am going way far..**** > > **** > > According to the previous discussion I assume that the five flows are:***= * > > **** > > ME-6TOP - Query Flow**** > > ME-6TOP - Action Flow**** > > **** > > 6TOP - ME - Report Flow**** > > 6TOP - ME - Event Flow**** > > 6TOP - ME - Request BW Flow**** > > **** > > I'd like to start defining the content of the messages in the Report Flow= : > **** > > **** > > The Report Flow: has to deal with the information that a node knows and > has to be sent to the ME so the ME can compute the schedule among others. > Here I list the information that we can know in a mote and can be used a= t > the ME to compute the schedule (complete please if I miss something)**** > > **** > > For each known neighbor:**** > > -ID**** > > -AVG RSSI in a running window**** > > -Latest RSSI**** > > -Num TX packets**** > > -Num ACK packets**** > > -Num RX packets**** > > -Last ASN when it heart about that neighbor **** > > **** > > Other fields**** > > -Num links in the Schedule to that neighbor**** > > -For each link PDR**** > > **** > > **** > > Then we need to have some TLV like objects that can be used for > ad-hoc/naive/other extensions of the reporting process. In that way we > don't constraint the implementation of the scheduling alg. to that > information.**** > > **** > > what do you think?**** > > X**** > > **** > > On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote:*= * > ** > > Hi all,**** > > **** > > In this thread, we will continue the discussion about Confirmation > message. Here is some background information.**** > > **** > > Context: e.g.**** > > - node sends a report and want to know if the report is accepted., **= * > * > > - ME sends a action request and want to know if/when the action taken= . > **** > > Options:**** > > (1) Nothing**** > > (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** > > (3) App-level ACK type**** > > (4) Use different flow (i.e. action flow)**** > > **** > > IMHO, different control flow may have different requirement for > confirmation message.**** > > (1) Action Flow, needs a App-level confirmation, like Succ/Fail**** > > (2) Query Flow, automatically has the confirmation, i.e. the message > packet corresponding to a specific query.**** > > (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer > option (1) and (3), i.e. the confirmation message is an option, but if a > confirmation message is needed, it should be App-level Ack, instead of > transport layer confirmation, which will give 6top more flexibility.**** > > **** > > What do you think?**** > > **** > > Thanks**** > > Qin**** > > **** > > **** > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > **** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > **** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > **** > > **** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > **** > > **** > > **** > > **** > > ** ** > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch**** > > ** ** > --047d7b11201b063a9f04e6393903 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Pouria,
Thanks again for the overview, which complemen= ts your first document nicely.

Alfredo,
= Could you please elaborate what you mean by in-network processing? Are you = referring to a distributed way for the nodes to "consume" this da= ta, some fusion as the data trickles up the DAG, or something else?

Thomas


On Thu, Sep 12, 2013 at 12:34 AM, Alfredo Grieco <= span dir=3D"ltr"><alfredo.grieco@gmail.com> wrote:

Hi All,

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Do you t= hink is it feasible to add a bit/flag that allows some form of in-network p= rocessing ?

=A0

<= font color=3D"#1f497d" face=3D"Calibri">This wou= ld be very useful to distributed/decentralized scheduling techniques and sh= ould not cost that much.

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Any thou= ghts is welcome.

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Cheers

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Alfredo<= u>

=A0

Da: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] Per conto di P.Zand@utwente.nl
Inviato: Wednesday, Septembe= r 11, 2013 10:45 PM
A: xvilajosan= a@eecs.berkeley.edu; watteyne@eecs.berkeley.edu
Cc: 6tsch@ietf.org
Oggetto: Re: [6tsch] report flow contents

=A0

Thomas,

I agree with you that &quo= t;source route failed" and "graph route failed" are out of s= cope of 6TiSCH.

Regarding to you question = about the per-channel report, I think they are based on each radio channel = supported by the specification (channel 11-26 in 2.4GHz in IEEE 802.15.4), = not channel offset. And a channel report generated for all neighbor.=

Regardi= ng to your first question, let me now explain more. I think both of these s= tandard provide a mechanisms to make it possible for System/Network Manager= to also read (pull) desired attributes (But not all the feature in 6TiSCH)= . For example in WirelessHART [1], by =93Report Neighbor Health List=94 req= uest, the network manager might mention the number of neighbors to be read = in =93Number of Neighbor entries read=94 field..

I think= , ISA100.11a provides more mechanisms for System manager to get the desired= attributes from the field devices. And the first two features that you men= tioned might also be supported by ISA100.11a.

In ISA1= 00.11a, three mechanisms are provided for reporting diagnostic information = contained in dlmo.NeighborDiag (described in section 1 later) and dlmo.Chan= nelDiag (described in Section 2 later):

  1. The health reports concentrator object (HRCO), ca= n be configured to report any attribute in the DL on a periodic bas= is. dlmo.NeighborDiag entries (shown in Table 2) and dlmo.Channe= lDiag (shown in Table 5) can be reported through that mechanism. Through th= e HRCO, the system manager can configure the device to report NeighborDiag = periodically, such as every 30 minutes. Following each such report, on a pe= r-entry basis, NeighborDiag counts shall be reset to zero. Levels shall use= the current value as a starting point for the next period [2].
  2. Diagnostic information can= be retrieved at any time by the system manager, by reading the applicable = attributes. The system manager can read (poll) NeighborDiag as a read-only = attribute on a per-entry basis. As in an HRCO report, counts shall be reset to zero when read [2].
  3. Diagnostic information can= be reported by the DL on an exception = basis, through the DL_Connectivity alert (Described in section 3= (a)). The DL can additionally be configured, through the dlmo.AlertPolicy a= ttribute (shown in Table 6), to report NeighborDiag information when diagno= stic values exceed a threshold. Only the row triggering the alert is report= ed. No values are reset [2].

=A0

In ISA1= 00.11a, the system manager establishes a DL communication relationship betw= een a device and its neighbor by adding an entry to the device=92s dlmo.Nei= ghbor attribute (see Table 1). Each such entry specifies a level of diagnos= tics to be collected, through the field dlmo.Neighbor[].DiagLevel. For each= neighbor, diagnostics may be collected at a baseline level, or a detailed = level including clock diagnostics [2]. This levels are described in Section= 1.

Table 1. dlmo.= Neighbor fields [2]

Field name=

Field encoding<= u>

* Index (16-bit address of neighbor)

ExtDlUint (used as an index)<= /u>

= EUI64 (EUI-64 identifier of the neighbor)=

Type: Unsigned64

= =85

= =85

DiagLevel (selection of neighbor diagnostics to collect)=

Type: Unsigned2<= /p>

Bit0 =3D 1 Colle= ct link diagnostics

Bit1 =3D 1 Collect clock diagnostics=

= =85

= =85

<= /div>

=A0

When the dlmo.Neighbor= [].DiagLevel field is set for a particular neighbor, the DL shall create co= rresponding entries in the read-only attribute dlmo.NeighborDiag. NeighborD= iag values are accumulated from the time that the dlmo.NeighborDiag entry i= s created [2].

1.=A0=A0=A0= =A0=A0 dlmo.NeighborDiag:

dlmo.NeighborDiag is an in= dexed OctetString collection that contains diagnostics for a set of neighbo= rs. The attribute is read-only, with rows created as needed by the DL [2].<= u>

Neighbo= rDiag entries are instantiated by the system manager, by setting dlmo.Neigh= bor[].DiagLevel bits to non-zero values. Iff (if and only if) Bit0=3D1, the= n summary diagnostics shall be collected for the neighbor, consolidated acr= oss all channels. Iff Bit1=3D1, then detailed clock diagnostics shall be co= llected for the neighbor, consolidated across all radio channels [2].

Table 2. dlmo.= NeighborDiag fields [2]

= * Index

= Field name

= Field encoding

= Type: ExtDlUint (neighbor address, used as an index)=

<= span style=3D"font-size:11.0pt;font-family:"Calibri","sans-s= erif";font-weight:bold">Summary

Type: OctetString (see Table 3)<= u>

ClockDetail

Type: OctetString (see Table 4)<= u>

=A0

Table 3. Diagnostic Summary = OctetString fields [2]

= RSSI (level)

= RSQI (level)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= RxDPDU (count)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= TxSuccessful (count)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= TxFailed (count)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= TxCCA_Backoff (count)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= TxNACK (count)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= ClockSigma (level)

= Field name

= Field encoding

= Type: Integer8

= Type: Unsigned8

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

= Type: Integer16

<= u>=A0

Table 4. Diagn= ostic ClockDetail OctetString fields [2]

<= u>=A0

2.=A0=A0=A0=A0=A0 = dlmo.ChannelDiag:

dlmo.ChannelDiag is a read-only dynamic attribute that reports DPDU= transmit failure rates on each radio channel supported by the specificatio= n. This enables the system manager to be aware of consistent connectivity p= roblems on a per-channel basis, as a diagnostic for spectrum management in = a subnet [2].

Two diagnostics are reported for each channel, = each indicating a different type of failure. indicates the percentage= of time that unicast DPDU transmissions on channel N did not receive an AC= K or a NACK. indicates the percentage of time that unicast DPDU transmi= ssions on channel N were aborted due to CCA. [2]

Table 5. dlmo.= ChannelDiag fields

= Count (Number of attempted unicast transmissions for all chann= els)

= Field name

= Field encoding

Type:Unsigned16

(Percentage of time transmissions on channel 0 d= id not receive an ACK)

Type: Integer8

(Percentage of time transmissions on channel 0 a= borted due to CCA)

Type: Integer8

= =85

= =A0

(Percentage of time transmissions on channel 15 = did not receive an ACK)

Type: Integer8

(Percentage of time transmissions on channel 15 = aborted due to CCA)

Type: Integer8

=A0

3.=A0=A0=A0=A0=A0 Data link layer alerts<= /p>

  1. <= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif";font-weight:bold">DL_Connectivity alert<= u>

DL performance diagnostics are accumulated in the attributes dl= mo.NeighborDiag for per-neighbor diagnostics, and dlmo.ChannelDiag for per-channel diagnostics. Normally the system manager confi= gures the HRCO to report these diagnostics periodically, and the DL automat= ically resets the diagnostic counters whenever these attributes are so repo= rted. Between such reports, diagnostics may indicate a problem that needs t= o be reported to the system manager immediately. The DL_Connectivity alert = provides the mechanism for the DL to report such issues, and the dlmo.Alert= Policy attribute enables the system manager to set thresholds for such repo= rting [2].

The attribute dlmo.AlertPolicy enables/disables the DL_Connectivity = alert and provides thresholds to control whether alerts are reported. dlmo.= AlertPolicy is an OctetString containing fields as shown in Table 6 [2].=

Table 6. dlmo.= AlertPolicy fields

= Field name

= Field scalar type

= Descriptor (Enables or disabled the DL_Connectivity alert.)=

Type Alert report descriptor<= /u>

NeiMinUnicast (M= inimum number of unicast transactions needed for a neighbor report.)=

Type: ExtDlUint

NeiErrThresh (Re= port neighbor diagnostic if the percentage error rate reaches this threshol= d )

Type: Unsigned8

ChanMinUnicast (= Minimum number of unicast transactions on a channel needed as a pre-conditi= on for triggering an alert.)

Type: ExtDlUint

= NoAckThresh (Report ChannelDiag if a NoAck value is greater th= an this threshold)

Type: Unsigned8

CCABackoffThresh= (Report ChannelDiag if a CCABackoff value is greater than this threshold)<= u>

Type: Unsigned8

=A0

  1. NeighborDiscovery alert

The NeighborDiscovery alert provides a mechanism for the DL to= report the contents of the OctetString in dlmo.Candidates attribute (see T= able 7).

The neighbors in the dlmo.Neighbor attribute are= set by the system manager, not by the device itself. The DL autonomously b= uilds a list of candidate neighbors in the dlmo.Candidates attribute. This = list is then forwarded to the system manager. The system manager considers = the radio connectivity that is reported in dlmo.Candidates, but may also co= nsider other criteria such as resource constraints, historical performance,= or subnet topology [2].

Table 7. dlmo.= Candidates OctetString fields

Field name

Field encoding

N (count of disc= overed neighbors)

Type: Unsigned8<= u>

Neighbor1 (16-bi= t address of first candidate)

Type: ExtDlUint<= u>

RSSI1 (radio sig= nal quality of first candidate)

Type: Integer8

RSQI1 (radio sig= nal quality of first candidate)

Type: Unsigned8<= u>

etc=85=

=A0

NeighborN (16-bi= t address of Nth candidate)

Type: ExtDlUint<= u>

RSSIN (radio sig= nal quality of Nth candidate)

Type: Integer8

RSQIN (radio sig= nal quality of Nth candidate)

Type: Unsigned8<= u>

=A0

Re= ferences

1.=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0 IEC 62591: Industrial Communication Networks - Wireless Com= munication Network and Communication Profiles - WirelessHART.=

=A0

2.=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0 IEC 62734: Industrial communication networks - Fieldbus specifica= tions - Wireless systems for industrial automation: process control and rel= ated applications - ISA100.11a.

=A0

<= font color=3D"#1f497d" face=3D"Calibri">= =A0

6tsch-bounces@ietf.org [ma= ilto:6tsch-boun= ces@ietf.org] On Behalf Of <= /b>Xavier Vilajosana Guillen
Sent: Wednesday, September 1= 1, 2013 8:54 PM
To: Thoma= s Watteyne
Cc: 6TSCH
<= b>Subject: Re: [6tsch] report f= low contents

=A0

Hi Thomas,

my 5 cents.

I agree on adding = NACK information and timing differences with other than time source parent = neighbors. I will add to the wiki :-)

As regards to t= he differences of what we do at 6TiSCH and WHart or ISA100.11a, our proposa= l is more flexible and has less cohesion with a cost of increased complexit= y (e.g configurable data and reporting period). We have to analyse carefull= y what are the implications in terms of protocol complexity and implementat= ion of that mechanism versus how often they would be used. Could we maybe d= efine some "templates" or default configurations so using the 6Ti= SCH can be done without configuration overhead? Then configuration can be u= sed for those that are really interested on tuning their system. =

just thoughts..
X

=A0=

=A0

On W= ed, Sep 11, 2013 at 9:58 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu> wr= ote:

Pouria,

=A0

Wonderful list.

=A0

Your document clearly highlights that (1)= the "report" flows both in WirelessHART and ISA100.11a are stric= tly periodic and (1) they have a fixed format. From what we have discussed = so far, the solutions we are developing is different in the following ways:=

  • 6TiSCH offers a m= echanism allowing the PCE to configure what data it want to receive, and co= nfigure the trigger for a node to generate from data.<= /font>
  • 6TiSCH offers=A0a mechanism allowing the PCE to que= ry the data, on top of having the nodes push the information<= /span>
  • In 6TiSCH, the format of the payload is not fixed. = In particular, it is possible to add application-specific fields, allowing = for extensions.
  • In 6TiSCH,=A0the transport (CoAP?) and formatting (= CBOR?) are IETF-friendly and integrate well in the IPv6 stack and associate= d mechanisms

= Did I get that right?=

=A0<= /span>

A couple of questions:

  • the = WirelessHART "alarms" correspond to a 6TiSCH "events". = Yet, I suppose that a "source route failed" and "graph route= failed" are out of scope of 6TiSCH, but rather part of RPL. I would e= xpect those to the ICMPv6 messages. Thoughts?
  • About the per-channel report, I assume this is &quo= t;per frequency", right? Is a channel report generated for each neighb= or?
  • When comparing your list to Xavi's=A0https://bitbucket.or= g/6tsch/meetings/wiki/report_flow_contents:=
    • we might= want to add a "numNACK" counter to the neighbor information
    • we might want to keep timing statistics for all nei= ghbors, not just time source parents. That is, when I receive a packet from= a neighbor which is not my time source neighbor, I do not change my clock,= but I still know the timing error.

Thomas

=A0

On Wed, Sep 11, 2013 at 7:18 AM, <P.Zand@utwente.nl> wrot= e:

Dear All,

In the following, I listed the p= erformance metrics reported to the Network/System Manager in WirelessHART a= nd ISA100.11a.

Some= reports still need be added, for example the path failure alerts in ISA100= .11a.

Pour= ia

=A0

WirelessHART performance metrics=

<= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif"">In WirelessHART[1] network the statistics and = events are reported to the Network Manager (act like PCE in 6TiSCH) through= the following commands:

  1. This re= port is sent periodically toward the Network Manager. The report summaries = the communication statistics of a device.

    Byte

    =

    Format

    Description<= /u>

    0-1

    <= /td>

    Unsigned-16<= /u>

    Number of packets generated by this = device since last report

    2-3

    <= /td>

    Unsigned-16<= /u>

    Number of packets terminated by this= device since last report

    4

    Unsigned-8

    Number of Data-Link Layer MAC MIC fa= ilures detected

    5

    Unsigned-8

    Number of Network Layer (Session) MI= C failures detected

    6

    Enum-8

    Power Status=

    7

    Unsigned-8

    Number of CRC Errors detected=

    =A0

    1. Report =93Neighbor Hea= lth List=94

    This report is sent pe= riodically toward the Network Manager. The report includes the statistics o= f linked neighbors.

    Byte

    =

    Format

    Description<= /u>

    0

    Unsigned-8

    Neighbor table index

    1

    Unsigned-8

    Number of Neighbor entries read

    2

    Unsigned-8

    Total number of neighbors

    3-4

    <= /td>

    Unsigned-16<= /u>

    Nickname of neighbor

    5

    Bit-8

    Neighbor Flags<= u>

    6

    Signed-8=

    Mean RSL (Receive Signal Level in dB= m) since last report

    7-8

    <= /td>

    Unsigned-16<= /u>

    Number of Packets transmitted to thi= s neighbor

    9-10

    =

    Unsigned-16<= /u>

    Number of Packets received from this= neighbor

    11-12

    Unsigned-16<= /u>

    Packets received from this neighbor<= /span>

    13-=85

    =A0

    <= /td>

    Number of entries based on response = byte 1

    =A0

    1. Report =93Neighbor Sig= nal Levels=94

    This report is sent pe= riodically toward the Network Manager. The report includes the statistics o= f discovered (but not linked) neighbors. These neighbors might be discovere= d when a device has heard the neighbor communication in the discovery links= . A device that wish to join a network, send a join request to the Network = manager, including this report.

    Byte

    =

    Format

    Description<= /u>

    0

    Unsigned-8

    Neighbor table index

    1

    Unsigned-8

    Number of Neighbor entries read

    2

    Unsigned-8

    Total number of neighbors

    3-4

    <= /td>

    Unsigned-16<= /u>

    Nickname of neighbor

    5

    Signed-8=

    RSL of neighbor in dB<= u>

    6-8

    <= /td>

    =A0

    <= /td>

    Repeats (as needed) based on respons= e byte 1

    =A0

    1. Alarm =93Path Down=94 =

    The alarm is sent upon= detecting a path failure.

    Byte=

    Format

    Descriptio= n

    0-1

    Unsigned-16

    Nickname of neighbor to which path failure was detected

    =A0

    1. This al= arm is sent upon detecting a source route failure.<= /u>

      Byte

      =

      Format

      Description<= /u>

      0-1

      <= /td>

      Unsigned-16<= /u>

      Nickname of unreachable neighbor in = the source route

      2-5

      <= /td>

      Unsigned-32<= /u>

      Network-Layer MIC (i.e., the MIC gen= erated using the session key) from the NPDU that failed routing

      =A0

      1. This al= arm is sent upon detecting a graph route failure.

        Byte

        =

        Format

        Description<= /u>

        0-1

        <= /td>

        Unsigned-16<= /u>

        Graph Id of the failed route<= /font>

        =A0

        =A0

        ISA100.11a performance metric

        <= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif"">In ISA100.11a[2], the L2 performance metrics a= re reported to the System Manager (act like PCE in 6TiSCH) and can be class= ified into (1) DL_Connectivity alert and (2) NeighborDiscovery alert.

        1. The DL= _connectivity alert can be classified into (a) Per-neighbor reports and (b)= Per-channel reports.

            • Per-neighbor report=

          Per-neighbor reports are the=A0 performance metrics abou= t the neighbors connection and are reported to the System Manager. These st= atistics are accumulated in the =93dlmo.NeighborDiag=94 attribute, for each= neighbor. This report is similar to =93Neighbor Health List=94 report in W= irelessHART.

          Each node i= n ISA100.11a might be asked to report the following statistics about its ne= ighbor:

          =A0<= /font>

          Octets

          Format

          Description<= /u>

          1

          Signed-8=

          RSSI (level)=

          1

          Unsigned-8

          RSQI (level)=

          1-2

          <= /td>

          ExtDLUint

          RxDPDU(count): Number of valid Packe= ts received from this neighbor

          1-2<= u>

          ExtDLUint

          TxSuccessful (count):Count of successful unicast transmissions to= the neighbor

          1-2<= /span>

          ExtDLUint

          TxFailed (count): Number of unicast transmission, without=A0 gett= ing any ACK or NACK

          1-2<= /span>

          ExtDLUint

          TxCCA_Backoff (count): Number of unicast transmission aborted due= to CCA

          1-2<= /span>

          ExtDLUint

          TxNACK (count): Number of NACKs received<= /u>

          2

          Signed-16

          ClockSigma (level): A rough estimate of standard deviation of clo= ck corrections

          =A0

            • Per-channel report<= /b>

          In addition, in ISA100.11a, several performance metrics = are reported based on channel for all neighbors to the System Manager. Thes= e statistics are accumulated in the =93dlmo.ChannelDiag=94 attribute. This = report is similar to =93Device Health=94 report in WirelessHART.

          Byte

          =

          Format

          Description<= /u>

          0-2

          <= /td>

          Unsigned-16<= /u>

          Count (Number of attempted unicast t= ransmissions for all channels)

          3=

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 0 did not receive an ACK)

          4

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 0 aborted due to CCA)

          =85<= /span>

          =A0

          =A0

          33

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 15 did not receive an ACK)

          34

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 15 aborted due to CCA)

          =A0

          1. In ISA= 100.11a, each node sends a report, including a list of candidate (overheard= ) neighbors, to the System Manager to make a potential new routing decision= s. The =93dlmo.Candidates=94 attributed is used to store those information = in each node in the L2. This report is similar to the =93Neighbor Signal Le= vels=94 report in WirelessHART.

            Octets

            Format

            Description<= /u>

            1

            Unsigned-8

            N (count of discovered neighbors)

            0-2

            <= /td>

            ExtDlUint

            address

            0-1<= /span>

            Signed-8

            <= /span>

            0-1<= /span>

            Unsigned-8

            <= /span>

            =85<= /span>

            =A0

            =A0

            0-2<= /span>

            ExtDlUint

            <= font face=3D"Calibri">address

            0-1<= /span>

            Signed-8

            <= /span>

            0-1<= /span>

            Unsigned-8

            <= /span>

            =A0=

            =A0

            References

            1.=A0= =A0=A0=A0=A0=A0 IEC 62591: Industrial Communication Networks - Wireless Communicati= on Network and Communication Profiles - WirelessHART.<= u>

            =A0<= /font>

            2.=A0= =A0=A0=A0=A0=A0 IEC 62734: Industrial communication networks - Fieldbus specificati= ons - Wireless systems for industrial automation: process control and relat= ed applications - ISA100.11a.

            =A0<= /span>

            = =A0

            =A0<= /span>

            From: 6tsch-bounces@ietf.= org [mailto:6tsch-bounces@ietf.org] On Behalf = Of Thomas Watteyne
            Sent: Saturday, September 07= , 2013 7:43 PM
            To: Xavi V= ilajosana
            Cc: Pascal Thub= ert (pthubert); 6tsch@i= etf.org
            Subject: Re: [6tsch] report = flow contents

            =A0

            Xavi,

            Great, thanks!=

            Thomas

            =A0

            On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen <xvilajosana@e= ecs.berkeley.edu> wrote:

            Hi,
            I created the scra= tchpad section in the wiki to keep ideas
            https://bitbucket.org/6tsch/m= eetings/wiki/Home


            and added the flow content information here.

            https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents

            have a nice weekend!

            X

            =A0

            On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:=

            Hi Pascal, it is a good id= ea!

            I will collect that information= and as Thomas put it at the wiki so we do not lose it.

            :-)

            X

            = =A0

            On Fri, Sep 6, 2013 at 8:51= AM, Pascal Thubert (pthubert) <pthubert@cisco.com> wrote:

            Hello Xavi:<= /p>

            =A0<= /span>

            = At the call I mentioned we could use info on tra= cks and cells as well, probably on demand from the PCE.

            For = instance, the PCE could observe energy levels over some cells for=A0 a whil= e to make sure they are clean.

            =A0<= /span>

            = What do you think?

            Pascal

            =A0

            From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana= Guillen
            Sent: vendredi 6 septembre 2= 013 01:17
            To: Thomas Watt= eyne
            Cc: 6tsch@ietf.org
            Subject: Re: [6tsch] report = flow contents

            =A0=

            agreed!

            So the fields become= :

            =A0

            =A0=

            For each known = neighbor:

            =A0-ID

            =A0-AVG RSSI in a running wind= ow

            =A0-Latest RSSI

            =A0-AVG LQI in a running= window [optional]

            =A0-Latest LQI [optional]<= /p>

            =A0-Num TX packets (option in = case there is communication with that neighbor)=

            =A0-Num ACK packets (option in= case there is communication with that neighbor)

            =A0-Num RX packets (option in = case there is communication with that neighbor)=

            =A0-Last ASN when it hear= t about that neighbor=A0

            =A0-Bundle: Num links in the Schedule to that nei= ghbor

            =A0 =A0 =A0 -PDR per link [Opt= ional -- or maybe best and worst PDR only]

            <= /div>

            =A0

            =A0-Option Flag (weather there are op= tional TLV fields on that category)

            =A0

            =A0-For each Queue:<= /font>

            =A0 =A0 - Avg Queue length in = a running window

            =A0 =A0 - Max Queue length in a running window (peak)

            =A0 =A0 - Current Queue length= (?)

            =A0 =A0 - ASN of the oldest packet in the QUEUE?=

            =A0 =A0 -Option Flag (wea= ther there are optional TLV fields on that category)

            =A0 =A0 =A0 =A0 +(TLV objects)= *=A0

            =A0

            -Time source parent

            = =A0 =A0 -ID

            =A0 =A0 -Avg clock drift (corr= ection done) in a running window

            =

            =A0 =A0 -Latest clock correction

            =A0 =A0 -Parent changes (count= er of how many times I changed my time source parent)<= u>

            =A0 =A0 -Option Flag (wea= ther there are optional TLV fields on that category)

            =A0 =A0 +(TLV objects)*=A0

            = =A0

            -Option Flag (weather th= ere are optional TLV fields in other categories)

            =A0 =A0+(TLV objects)*=A0

            =A0

            as regards to this:

            =A0

            "Finally, do you envision= a generic mechanism whereby the PCE can turn fields on/off, or triggered i= ndependently?"

            =A0

            I see it as CoAP Options, where a set of b= ytes can be used as "clever bitmap" to tell what options are ther= e, the parsing will decode option by option and will read the fields. In th= at way any combination of fields is supported.<= /p>

            =A0

            would that work?

            X=

            =A0

            On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <watteyne@eecs.berkeley.edu= > wrote:

            Xavi,

            =A0

            Fantastic!

            =A0

            I believe PDR for each link might be too long to fit in a pac= ket. While the mote will most likely keep that information, we could move t= hat to the query flow, i.e. it is available to the PCE on-demand.=

            =A0

            Would you = agree that the number of links in a bundle belongs to the neighbor? Of mayb= e we want a "bundle" category?

            =A0

            In queuing= , it might be interesting to see the age of the different packets, to be ab= le to monitor latency.

            =A0

            About LQI,= there is no general consensus among vendors on what the definition is, or = how exactly it is calculated. I would make it optional.

            =A0

            Also, it m= ight be good to be able to add arbitrary fields to each category: neighbor,= queue, time source neighbor.

            =A0

            Finally, d= o you envision a generic mechanism whereby the PCE can turn fields on/off, = or triggered independently?

            <= span style=3D"font-size:12.0pt;color:#888888">=A0

            Thomas=

            =A0<= /u>

            On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajo= sana Guillen <xvilajosana@eecs.berkeley.edu> wrote:<= /font>

            Hi Thomas, Diego,

            =A0=

            I agree that LQI should be there as well. I update here the l= ist with Thomas suggestions.=A0

            <= p>=A0

            For each known neigh= bor:

            =A0-ID

            =A0-AVG RSSI in a running wind= ow

            =A0-Latest RSSI

            =A0-AVG LQI in a running= window

            <= span style=3D"font-size:9.5pt;font-family:"Arial","sans-seri= f"">=A0-Latest LQI

            =A0-Num TX packets (option in = case there is communication with that neighbor)=

            =A0-Num ACK packets (option in= case there is communication with that neighbor)

            =A0-Num RX packets (option in = case there is communication with that neighbor)=

            =A0-Last ASN when it hear= t about that neighbor=A0

            =A0

            Other fields<= /u>

            =A0-Num links in= the Schedule to that neighbor

            =A0 =A0 -For each link PDR

            =A0-For each Queue:

            =A0 =A0 - Avg Queue length in a running window<= /span>

            =A0 =A0 - Max Queue length in a running wind= ow (peak)

            =A0 =A0 - Current Queue length (?)

            -Time source parent

            =A0 =A0 -ID

            =A0 = =A0 -Avg clock drift (correction done) in a running window

            =A0 =A0 -Latest clock correction<= /p>

            =A0 =A0 -Parent changes (counter of how many times I chang= ed my time source parent)

            =A0

            -Option Fl= ag (weather there are optional TLV fields)

            =A0 =A0+(TLV objects)*=A0

            =A0

            =A0

            Hope this = makes sense.

            cheers!
            Xavi

            =A0

            On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <watteyne@eecs.berkeley.ed= u> wrote:

            [renamed = thread]

            =A0

            Xavi,<= /p>

            =A0<= /p>

            A few thoughts:=

            - the count= ers (numTx, etc) will only be present for neighbors the node has communicat= e with, so they should be optional in the packet.

            - you have focused on the top= ological information (which I think is the right one). It might be useful t= o gather other data related to synchronization or queuing.=

            - I couldn't agree more w= ith your suggestion to make it extensible. This does mean that we will need= to state somewhere that a device need to ignore silently fields it does no= t understand.

            =A0

            Thomas=

            =A0

            On Thu, Sep 5, 201= 3 at 11:15 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu> = wrote:

            Hello, I guess that flows are getting defined and I started to thin= k on the contents of the messages on that flows. Not sure if this is the ri= ght time or I am going way far..

            =A0

            According to the pr= evious discussion I assume that the five flows are:

            =A0

            ME-6TOP - = Query Flow

            ME-6TOP - Action Flow

            =A0

            6TOP - ME - Report Flow

            =

            6TOP - ME - Event Flow

            6TOP - ME - Request BW Flow

            =A0

            I'd like to start defining the content of the messages in= the Report Flow:

            =A0=

            The Report Flow: has to deal with the information that a node= knows and has to be sent to the ME so the ME can compute the schedule amon= g others. Here I list =A0the information that we can know in a mote and can= be used at the ME to compute the schedule (complete please if I miss somet= hing)

            =A0

            For each k= nown neighbor:

            =A0-ID

            =A0-AVG R= SSI in a running window

            =A0-Latest RSSI

            = = =A0-Num TX packets

            =A0-Num ACK packets

            =A0-Num RX packets

            =A0-Last ASN when it heart about that neighbor=A0

            =A0

            Other fields

            =A0= -Num links in the Schedule to that neighbor

            =A0 =A0 -For each link PDR

            =A0

            =A0

            Then we ne= ed to have some TLV like objects that can be used for ad-hoc/naive/other ex= tensions of the reporting process. In that way we don't constraint the = implementation of the scheduling alg. to that information.

            =A0

            = = what do you think?

            X

            =A0

            On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu>= ; wrote:

            Hi all,

            =A0

            In this thread, we will continue t= he discussion about Confirmation message. Here is some background informati= on.

            =A0

            Context: e.g.<= /font>

            =A0 =A0 - node sends a report and want to know if the report is accepted= .,=A0

            =A0 =A0 - ME sends a action request= and want to know if/when the action taken.

            Options:

            =A0 =A0(1) Nothing

            =A0 =A0(2) Rely on transport mechanism (e.g. confirmable CoAP message)

            = =A0 =A0(3) App-level ACK type

            =A0 =A0(4) Use different flow (i.e. action flow)=

            =A0

            IMHO, different control flow may have different requirement for confirma= tion message.

            =A0 =A0 (1) Action Flow, ne= eds a App-level confirmation, like Succ/Fail

            =A0 =A0 (2) Query Flow, automatically has the confirmation, i.e. the mes= sage packet corresponding to a specific query.<= /p>

            =A0= =A0 (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer op= tion (1) and (3), i.e. the confirmation message is an option, but if a conf= irmation message is needed, it should be App-level Ack, instead of transpor= t layer confirmation, which will give 6top more flexibility.<= u>

            =A0

            What do you think?

            =A0

            Thanks<= u>

            Qin

            =A0 =A0=A0

            =A0

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            =A0<= u>


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            =A0

            =A0=

            =A0

            =A0

<= /div>

=A0


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<= span style=3D"font-size:12.0pt">=A0


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d="xml'?pptx'72,48,322,150?scan'72,48,322,150,208,322,72,48,145,150,217?rels'72,48,322,150,208,322,72,48,145,150,217?jpeg'72,48,322,150,208,322,72,48,145,150,217,145?bin'72,48,322,150,208,322,72,48,145,150,217,145,217,322?png'72,48,322,150,208,322,72,48,145,150,217,145,217,322,150"; a="259141463" Received: from rcdn-core2-3.cisco.com ([173.37.113.190]) by rcdn-iport-6.cisco.com with ESMTP; 13 Sep 2013 02:04:01 +0000 Received: from xhc-rcd-x05.cisco.com (xhc-rcd-x05.cisco.com [173.37.183.79]) by rcdn-core2-3.cisco.com (8.14.5/8.14.5) with ESMTP id r8D241l0023680 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for <6tsch@ietf.org>; Fri, 13 Sep 2013 02:04:01 GMT Received: from xmb-rcd-x04.cisco.com ([169.254.8.21]) by xhc-rcd-x05.cisco.com ([173.37.183.79]) with mapi id 14.02.0318.004; Thu, 12 Sep 2013 21:04:00 -0500 From: "Raghuram Sudhaakar (rsudhaak)" To: "6tsch@ietf.org" <6tsch@ietf.org> Thread-Topic: CoAP presentation for 9/13 Thread-Index: AQHOsCWDVi9c0d957UCHD/E4LDjEzQ== Date: Fri, 13 Sep 2013 02:04:00 +0000 Message-ID: <2C3A8CAFDCAFCA41B8BF705CD9471C5B185A7A62@xmb-rcd-x04.cisco.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.3.6.130613 x-originating-ip: [10.21.74.248] Content-Type: multipart/mixed; boundary="_004_2C3A8CAFDCAFCA41B8BF705CD9471C5B185A7A62xmbrcdx04ciscoc_" MIME-Version: 1.0 Subject: [6tsch] CoAP presentation for 9/13 X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 02:04:09 -0000 --_004_2C3A8CAFDCAFCA41B8BF705CD9471C5B185A7A62xmbrcdx04ciscoc_ Content-Type: multipart/alternative; boundary="_000_2C3A8CAFDCAFCA41B8BF705CD9471C5B185A7A62xmbrcdx04ciscoc_" --_000_2C3A8CAFDCAFCA41B8BF705CD9471C5B185A7A62xmbrcdx04ciscoc_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable All, Attached is the presentation that Xavi and I compiled for discussion tomorr= ow. -raghuram --_000_2C3A8CAFDCAFCA41B8BF705CD9471C5B185A7A62xmbrcdx04ciscoc_ Content-Type: text/html; charset="us-ascii" Content-ID: <22D35142AFF85642AE14D745AC47E55F@emea.cisco.com> Content-Transfer-Encoding: quoted-printable
All,
Attached is the presentation that Xavi and I compiled for discussion t= omorrow. 

-raghuram
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mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id G82r9IM8q9Lj for <6tsch@ietfa.amsl.com>; Thu, 12 Sep 2013 19:18:14 -0700 (PDT) Received: from mail-ie0-f182.google.com (mail-ie0-f182.google.com [209.85.223.182]) by ietfa.amsl.com (Postfix) with ESMTP id B4FE211E8163 for <6tsch@ietf.org>; Thu, 12 Sep 2013 19:18:13 -0700 (PDT) Received: by mail-ie0-f182.google.com with SMTP id aq17so1355430iec.27 for <6tsch@ietf.org>; Thu, 12 Sep 2013 19:18:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=Y7uGid4aTKki/WO31SPgqxwt1MQEUlGGHvZdjW9e27g=; b=NuURIK9b+FRqMYLdTZkI8Tfx36nTiFL+U3MWfgJruspokcAzA4+FZ91NoecDFCA2Xt fOoSND+PI2Uf59QVQGyX+4joBy2sNlC8LPfFD2JMCj8Iw4c5raYfpoeVNFsJmACJCJke /ljXBT5d3CBsLWB0o9Osvk2HHPAZ9F2BuZMB6TZZjo10sSYo8tV1kpAg1Ih20PeuUrUK +HhhXqWAZpcI9Raf97XMiHIT8GYS/mlqDX35umbhMBJyZhLJ9W7UWFiPsBzw8NjNyqiV hVaO1OiOc1uYys/1RBQ1McUcy14axsdji5z6+4VD712QYD1pODb8Jsn0/wCyTSdjbLQv GszQ== X-Gm-Message-State: ALoCoQmkjAHbU4NqDeQ41vY30yhj4Mn2lbny3zv0PhMfdoxysnvUGNondfzhlGauwkjFcldT1NRt MIME-Version: 1.0 X-Received: by 10.50.13.104 with SMTP id g8mr307831igc.30.1379038693088; Thu, 12 Sep 2013 19:18:13 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Thu, 12 Sep 2013 19:18:13 -0700 (PDT) In-Reply-To: References: Date: Fri, 13 Sep 2013 10:18:13 +0800 Message-ID: From: Qin Wang To: Xavier Vilajosana Guillen Content-Type: multipart/alternative; boundary=089e013c69c66f005004e63a77ae Cc: Thomas Watteyne , "Pascal Thubert \(pthubert\)" , 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] Rank rounding error, churn and hysteresis [was Zero Objective Function discussion] X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 02:18:18 -0000 --089e013c69c66f005004e63a77ae Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Pascal and Xavi, I agree with you that comparing the variation in ETX, rounding error can be ignored. Regarding to ETX, is there some guideline for determining the length of window to calculate ETX, especially when the duty cycle is very low? Thanks Qin On Thu, Sep 12, 2013 at 9:34 PM, Xavier Vilajosana Guillen < xvilajosana@eecs.berkeley.edu> wrote: > Hi Pascal, > > I agree with you. In OpenWSN we have a stability counter that prevents > changing the parent in case of little sudden variations, (avoiding > hysteresis) and a mechanism to smooth rank increases, in case a node > receives suddenly a very big rank from its parent. > > I also agree that little variations won't have an important effect. If yo= u > see here a problem we can try to simulate some scenarios and see what > happens. > > cheers! > Xavi > > > > > On Thu, Sep 12, 2013 at 2:37 AM, Pascal Thubert (pthubert) < > pthubert@cisco.com> wrote: > >> Hello Qin:**** >> >> ** ** >> >> In this particular case, a computation of DAGRank(rank) of 7 will >> prevent this node from attaching to other nodes that are also at 7, and >> will encourage more other nodes to attach to this. The end to end Rank >> calculation for children is only slightly affected since the 2 byte rank= is >> used for the total rank computation.**** >> >> ** ** >> >> I think that the rounding errors are part of the errors, just like the >> stats of transmissions may vary.**** >> >> Depending on the representation of ETX in memory, you might also have >> system that round to 1 decimal and others to 2 decimals and the same >> calculation may still create a similar effect.**** >> >> ** ** >> >> Is that a big deal? Well, Considering the variations on the ETX >> computation I do not think that this makes a lot of difference in the ru= n >> time.**** >> >> ** ** >> >> What is more critical is to use a good hysteresis so as to avoid jumping >> over the integral boundary of DAGRank(rank) all the time.**** >> >> ** ** >> >> Both RFC 6552 and 6719 recommend you to do that, with RFC 6552 >> dereferencing RFC 6719 that recommends to use a value boundary on Rank >> before reparenting.**** >> >> http://tools.ietf.org/html/rfc6719#section-3.2.2 :**** >> >> ** ** >> >> 3. If the smallest path cost for paths through the candidate**** >> >> neighbors is smaller than cur_min_path_cost by less than**** >> >> PARENT_SWITCH_THRESHOLD, the node MAY continue to use the current= * >> *** >> >> preferred parent. This is the hysteresis component of MRHOF.**** >> >> ** ** >> >> RFC 6552 recommends by default to follow that guidance in >> http://tools.ietf.org/html/rfc6552#section-4.1 **** >> >> ** ** >> >> it is thus***= * >> >> RECOMMENDED to base the computation of the step_of_rank on dynamic***= * >> >> link properties such as the expected transmission count (ETX) metric*= * >> ** >> >> as introduced in [DeCouto03] >> and discussed in [RFC6551 ]. >> "Minimum**** >> >> Rank Objective Function with Hysteresis" [HYSTERESIS] >> provides**** >> >> guidance on how link cost can be computed and on how hysteresis can**= * >> * >> >> improve Rank stability.**** >> >> ** ** >> >> Additional tuning or methods exist to increase stability. We can start >> some work on that if we find that MRHOF=92s method is not sufficient in = our >> case.**** >> >> ** ** >> >> One method (Cisco IPR there) consists in hiding limited variations of th= e >> Rank to the children (around the last advertised 2 bytes value) until: *= * >> ** >> >> 1) a delta threshold is reached in the step of rank with parent (one-hop >> hysteresis)**** >> >> or **** >> >> 2) Rank has to be recomputed because of the parent (the parent changes o= r >> the Rank of the parent changes)**** >> >> ** ** >> >> This method creates a laser effect by which a number of new values of >> Rank a recomputed and advertised as a single wave, whereby every node >> affected by the change re-centers its rank value to its current moving >> average, reducing the chances to hit condition 2) in the near future.***= * >> >> ** ** >> >> What do you think?**** >> >> ** ** >> >> Pascal**** >> >> ** ** >> >> *From:* Qin Wang [mailto:qinwang@berkeley.edu] >> *Sent:* mercredi 11 septembre 2013 23:58 >> *To:* Pascal Thubert (pthubert) >> *Cc:* xvilajosana@eecs.berkeley.edu; Thomas Watteyne; 6TSCH >> *Subject:* Re: [6tsch] Zero Objective Function discussion**** >> >> ** ** >> >> Hi Pascal,**** >> >> ** ** >> >> I agree with your calculation. But, I have a small question.**** >> >> ** ** >> >> If you calculate with rank_increase=3D(2*xmit/ack)*256, instead >> of rank_increase=3D(512*xmit/ack), then, you will get the result as foll= ows. >> **** >> >> ** ** >> >> r(1)=3Dr(0)+2.66*256 =3D 2.66*256 =3D> DAGRank(rank) =3D 2= **** >> >> r(2)=3Dr(1)+2.66*256=3D 5.32*256 =3D> DAGRank(rank) =3D = 5**** >> >> r(3)=3Dr(2)+2.66*256=3D7.98*256 =3D> DAGRank(rank) =3D = 7**** >> >> r(4)=3Dr(3)+2.66*256=3D10.64*256 =3D> DAGRank(rank) =3D 1= 0**** >> >> r(5)=3Dr(4)+2.66*256=3D13.30*256 =3D> DAGRank(rank) =3D = 13**** >> >> You can see r(3) is different from that in your calculation. Obviously, >> the difference comes from different implementation. In another word, >> following same OF, different implementation may lead to different Rank >> value. Then, my question is if it is Ok while the motes from different >> vendors work together in a DAG.**** >> >> Please point out if I'm wrong.**** >> >> Thanks**** >> >> Qin**** >> >> ** ** >> >> ** ** >> >> ** ** >> >> ** ** >> >> **** >> >> ** ** >> >> On Wed, Sep 11, 2013 at 3:08 AM, Pascal Thubert (pthubert) < >> pthubert@cisco.com> wrote:**** >> >> Hello Xavi:**** >> >> **** >> >> Great!**** >> >> **** >> >> I=92d add the following:**** >> >> **** >> >> RFC 6550 3.5.1 . Ra= nk Comparison (DAGRank())has:**** >> >> =93**** >> >> When an Objective Function computes Rank, the Objective Function**** >> >> operates on the entire (i.e., 16-bit) Rank quantity. When Rank is***= * >> >> compared, e.g., for determination of parent relationships or loop**** >> >> detection, the integer portion of the Rank is to be used. The**** >> >> integer portion of the Rank is computed by the DAGRank() macro as**** >> >> follows, where floor(x) is the function that evaluates to the**** >> >> greatest integer less than or equal to x:**** >> >> **** >> >> DAGRank(rank) =3D floor(rank/MinHopRankIncrease)**** >> >> **** >> >> For example, if a 16-bit Rank quantity is decimal 27, and the**** >> >> MinHopRankIncrease is decimal 16, then DAGRank(27) =3D floor(1.6875) = =3D**** >> >> 1. The integer part of the Rank is 1 and the fractional part is**** >> >> 11/16.**** >> >> **** >> >> =93**** >> >> DAGRank(rank) is what we expect to place in the Flow label and the join >> priority.**** >> >> In our case:**** >> >> **** >> >> r(1)=3Dr(0)+rank_increase =3D 0+683 =3D> DAGRank(rank) =3D= 2**** >> >> r(2)=3Dr(1)+683=3D1366 =3D> >> DAGRank(rank) =3D 5**** >> >> r(3)=3Dr(2)+683=3D2049 =3D> >> DAGRank(rank) =3D 8**** >> >> r(4)=3Dr(3)+683=3D2732 =3D> >> DAGRank(rank) =3D 10**** >> >> r(5)=3Dr(4)+683=3D3415 =3D> >> DAGRank(rank) =3D 13**** >> >> **** >> >> We see that the DAGRank() always increases at least by one. This is the >> desired property so as to ensure that we can detect loop with just one >> octet in the flow label.**** >> >> Note that the real 2 octets Rank does not lose the rounding info since >> the DIP always passes 2 octets.**** >> >> **** >> >> Cheers,**** >> >> **** >> >> Pascal**** >> >> **** >> >> *From:* Xavier Vilajosana Guillen [mailto:xvilajosana@eecs.berkeley.edu] >> *Sent:* mardi 10 septembre 2013 19:53 >> *To:* Pascal Thubert (pthubert) >> *Cc:* Thomas Watteyne; 6TSCH >> *Subject:* Re: [6tsch] Zero Objective Function discussion**** >> >> **** >> >> Hi all, >> >> after some study I agree that we can use the RFC6552 in the minimal >> 6TiSCH configuration. I would like to call for approval or more input fr= om >> others before I consolidate the text in the draft. >> >> I put here an example following Pascal suggestion: >> >> Given >> >> Rf =3D 1 >> Sp =3D 2* ETX >> Sr =3D 0 >> minHopRankIncrease =3D 256 (default in RPL)**** >> >> ETX=3D(xmit/ack)**** >> >> **** >> >> r(n) =3D r(p) + rank_increase >> rank_increase=3D (Rf*Sp + Sr) * minHopRankIncrease **** >> >> rank_increase=3D(512*xmit/ack) >> >> >> if we take 5 hops (95 are supported) network and r(0)=3D0 and xmit=3D100= and >> ack=3D75 for all nodes >> >> r(1)=3Dr(0)+rank_increase =3D 0+683 with f=3D0 >> r(2)=3Dr(1)+683=3D1366 with f=3D1 >> r(3)=3Dr(2)+683=3D2049 with f=3D2 >> r(4)=3Dr(3)+683=3D2732 with f=3D2 >> r(5)=3Dr(4)+683=3D3415 with f=3D3 >> ... >> etc... >> >> so f is monotonically increasing and the rank function enables more than >> enough hops.**** >> >> Please provide feedback.**** >> >> cheers! >> Xavi**** >> >> **** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> ** ** >> > > --089e013c69c66f005004e63a77ae Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hi Pascal and Xavi,

I agree with you th= at comparing the variation in ETX, rounding error can be ignored.

Regarding to ETX, is there some guideline for determining t= he length of window to calculate ETX, especially when the duty cycle is ver= y low?

Thanks
Qin




On Thu= , Sep 12, 2013 at 9:34 PM, Xavier Vilajosana Guillen <= xvilajos= ana@eecs.berkeley.edu> wrote:
Hi Pascal,

I ag= ree with you. In OpenWSN we have a stability counter that prevents changing= the parent in case of little sudden variations, (avoiding hysteresis) and = a mechanism to smooth rank increases, in case a node receives suddenly a ve= ry big rank from its parent.

I also agree that little variations won't have an import= ant effect. If you see here a problem we can try to simulate some scenarios= and see what happens.

cheers!
Xavi




On Thu, Sep 12, 2013 at 2:37= AM, Pascal Thubert (pthubert) <pthubert@cisco.com> wrote:<= br>

Hello Qin:

=A0<= /p>

In this particular case, = a computation of DAGRank(rank) of 7 will prevent this node from attaching t= o other nodes that are also at 7, and will encourage more other nodes to at= tach to this. The end to end Rank calculation for children is only slightly affected since the 2 byte rank is used for the total rank= computation.

=A0<= /p>

I think that the rounding= errors are part of the errors, just like the stats of transmissions may va= ry.

Depending on the represen= tation of ETX in memory, you might also have system that round to 1 decimal= and others to 2 decimals and the same calculation may still create a similar effect.

=A0<= /p>

Is that a big deal? Well,= Considering the variations on the ETX computation I do not think that this= makes a lot of difference in the run time.

=A0<= /p>

What is more critical is = to use a good hysteresis so as to avoid jumping over the integral boundary = of DAGRank(rank) all the time.

=A0<= /p>

Both RFC 6552 and 6719 recommend you to do that, with RFC 6= 552 dereferencing RFC 6719 that recommends to use a value boundary on Rank = before reparenting.

http://tools.ietf.org/html/rfc6719#= section-3.2.2 :

=A0<= /p>

=A0=A0 3.=A0 If the smallest path cost for paths through t= he candidate

=A0=A0=A0=A0=A0=A0 neighbors is smaller than cur_min_path_= cost by less than

=A0=A0=A0=A0=A0=A0 PARENT_SWITCH_THRESHOLD, the node MAY c= ontinue to use the current

=A0=A0=A0=A0=A0=A0 preferred parent.=A0 This is the hyster= esis component of MRHOF.

=A0<= /p>

RFC 6552 recommends by de= fault to follow that guidance in http://tools.ietf.org/html/rfc6552#section-4.1=

=A0<= /p>

=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 it is thus<= /p>

=A0=A0 RECOMMENDED to base the computation of the step_of_= rank on dynamic

=A0=A0 link properties such as the expected transmission c= ount (ETX) metric

=A0=A0 as introduced in [DeCouto03= ] and discussed in [RFC6551].=A0 "Minimum

=A0=A0 Rank Objective Function with Hysteresis" [HYSTERESIS] provides

=A0=A0 guidance on how link cost can be computed and on ho= w hysteresis can

=A0=A0 improve Rank stability.

=A0<= /p>

Additional tuning or meth= ods exist to increase stability. We can start some work on that if we find = that MRHOF=92s method is not sufficient in our case.

=A0<= /p>

One method (Cisco IPR the= re) consists in hiding limited variations of the Rank to the children (arou= nd the last advertised 2 bytes value) until:

1) a delta threshold is r= eached in the step of rank with parent (one-hop hysteresis)

or

2) Rank has to be recompu= ted because of the parent (the parent changes or the Rank of the parent cha= nges)

=A0<= /p>

This method creates a las= er effect by which a number of new values of Rank a recomputed and advertis= ed as a single wave, whereby every node affected by the change re-centers its rank value to its current moving average, reducing t= he chances to hit condition 2) in the near future.

=A0<= /p>

What do you think?=

=A0<= /p>

Pascal

=A0<= /p>

From: Qin Wang= [mailto:qinwang@= berkeley.edu]
Sent: mercredi 11 septembre 2013 23:58
To: Pascal Thubert (pthubert)
Cc: xvilajosana@eecs.berkeley.edu; Thomas Watteyne; 6TSCH
Subject: Re: [6tsch] Zero Objective Function discussion

=A0

Hi Pascal,

=A0

I agree with your calculation. But, I have a small q= uestion.

=A0

If you calculate with=A0rank_increase=3D(= 2*xmit/ack)*256, instead of=A0rank_increase=3D(512*xmit/ack), then, you wil= l get the result as follows.

=A0

r(1)=3Dr(0)+2.66*256 =3D = 2.66*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =3D> DAGRank(rank) =3D 2

r(2)=3Dr(1)+2.66*256=3D 5= .32*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0=A0=A0 =3D> DAGRank(rank) =3D 5

r(3)=3Dr(2)+2.66*256=3D7.= 98*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=3D> DAGRank(rank) =3D 7

r(4)=3Dr(3)+2.66*256=3D10= .64*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0=A0 =3D> DAGRank(rank) =3D 10<= span style=3D"font-size:10.0pt;font-family:"Arial","sans-ser= if"">

r(5)=3Dr(4)+2.66*256=3D13= .30*256 =A0 =A0 =A0 =A0 =A0 =A0 =A0=A0=A0 =3D> DAGRank(rank) =3D 13

You can see r(3) is diffe= rent from that in your calculation. Obviously, the difference comes from different implementation. In another word, following same OF, different im= plementation may lead to different Rank value. Then, my question is if it i= s Ok while the motes from different vendors work together in a DAG.<= span style=3D"font-size:10.0pt;font-family:"Arial","sans-ser= if"">

Please point out if I'= ;m wrong.

Thanks=

Qin<= /u>

=A0

=A0

=A0

=A0

=A0

=A0

On Wed, Sep 11, 2013 at 3:08 AM, Pascal Thubert (pth= ubert) <pthubert= @cisco.com> wrote:

Hello Xavi:

=A0<= /p>

Great!

=A0<= /p>

I=92d add the following:<= /span>

=A0<= /p> 

RFC 6550 =A0=A0=A03.5.1. Ran=
k Comparison (DAGRank())has:

=93<= /p> 

When an Objective Function computes Rank, the Objective Function
=A0=A0 operates on the entire (i.e., 16-bit) Rank quantity.=A0 When Ra=
nk is
=A0=A0 compared, e.g., for determination of parent relationships or lo=
op
=A0=A0 detection, the integer portion of the Rank is to be used.=A0 Th=
e
=A0=A0 integer portion of the Rank is computed by the DAGRank() macro =
as
=A0=A0 follows, where floor(x) is the function that evaluates to the
=A0=A0 greatest integer less than or equal to x:
=A0
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 DAGRank(rank) =3D floor(rank/M=
inHopRankIncrease)
=A0
=A0=A0 For example, if a 16-bit Rank quantity is decimal 27, and the
=A0=A0 MinHopRankIncrease is decimal 16, then DAGRank(27) =3D floor(1.=
6875) =3D
=A0=A0 1.=A0 The integer part of the Rank is 1 and the fractional part=
 is
=A0=A0 11/16.

=A0<= /p>

=93<= /p>

DAGRank(rank) is what we = expect to place in the Flow label and the join priority.

In our case:

=A0<= /p>

r(1)=3Dr(0)+rank_increase= =3D 0+683 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) = =3D 2

r(2)=3Dr(1)+683=3D1366=A0= =A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) =3D 5

r(3)=3Dr(2)+683=3D2049=A0= =A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) =3D 8<= u>

r(4)=3Dr(3)+683=3D2732 = =A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) =3D 10

r(5)=3Dr(4)+683=3D3415=A0= =A0=A0=A0=A0=A0=A0=A0 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =3D> DAGRank(rank) =3D 13

=A0<= /p>

We see that the DAGRank()= always increases at least by one. This is the desired property so as to ensure that we can detect loop with just one octet in the flow label.

Note that the real 2 octe= ts Rank does not lose the rounding info since the DIP always passes 2 octet= s.

=A0<= /p>

Cheers,<= /u>

=A0<= /p>

Pascal=

=A0<= /p>

From: Xavier V= ilajosana Guillen [mailto:xvilajosana@eecs.berkeley.edu]
Sent: mardi 10 septembre 2013 19:53
To: Pascal Thubert (pthubert)
Cc: Thomas Watteyne; 6TSCH
Subject: Re: [6tsch] Zero Objective Function discussion

=A0

Hi all,

after some study I agree that we can use the RFC6552 in the minimal 6TiSCH = configuration. I would like to call for approval or more input from others = before I consolidate the text in the draft.

I put here an example following Pascal suggestion:

Given

Rf =3D 1
Sp =3D 2* ETX
Sr =3D 0
minHopRankIncrease =3D 256 (default in RPL)

ETX=3D(xmit/ack)

=A0

r(n) =3D r(p) + rank_increase
rank_increase=3D (Rf*Sp + Sr) * minHopRankIncrease

rank_increase=3D(512*= xmit/ack)


if we take 5 hops (95 are supported) network and r(0)=3D0 and xmit=3D100 an= d ack=3D75 for all nodes

r(1)=3Dr(0)+rank_increase =3D 0+683 with f=3D0
r(2)=3Dr(1)+683=3D1366 with f=3D1
r(3)=3Dr(2)+683=3D2049 with f=3D2
r(4)=3Dr(3)+683=3D2732 with f=3D2
r(5)=3Dr(4)+683=3D3415 with f=3D3
...
etc...

so f is monotonically increasing and the rank function enables more than en= ough hops.

Please provide feedba= ck.

cheers!
Xavi

=A0


_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch

=A0



--089e013c69c66f005004e63a77ae-- From qinwang@berkeley.edu Fri Sep 13 06:47:41 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8E0A911E81A6 for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 06:47:41 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0 X-Spam-Level: X-Spam-Status: No, score=x tagged_above=-999 required=5 tests=[] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id a3jw3wWuayZn for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 06:47:41 -0700 (PDT) Received: from mail-ie0-f175.google.com (mail-ie0-f175.google.com [209.85.223.175]) by ietfa.amsl.com (Postfix) with ESMTP id BDC8911E80F6 for <6tsch@ietf.org>; Fri, 13 Sep 2013 06:47:40 -0700 (PDT) Received: by mail-ie0-f175.google.com with SMTP id e14so2423950iej.6 for <6tsch@ietf.org>; Fri, 13 Sep 2013 06:47:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=Y9PC5V+RXaghIA//RLZDJi2A8co3R3J3Bg4LjvwD7KI=; b=UMTOtPzRhwkv0IZ6FFn0KJ96vf3o3lWfVOsFxNMB2in1c6sDnxrhXNAh6quZEetQBy GVf1BrHe10pxDxd+kHlE5sEr2sYSYN0+YRR17rdRcSsOpHNB5/MOlAYfTz1cE2LAVTSh c7QWuCvcNEeLbKQVTQ5a2WfUH4aHgpwloz4gtvO2LFUyUw9lrh9kZqoOImmbP4wQu7Th GeRv2Z6ngv8+NoGAraKuPw0gooZpIdnbFGeDzYUj/vs2m9q83jj+3ABh/LsUKccQUayb 8gUMkSB0bf8R6gMMFCUSUCS4YrZuolQ6UhEqt6cOC+ChdlzzUScclglRKwWU/VjLlTeL MCJw== X-Gm-Message-State: ALoCoQmodcyusBFVbqMOdriIZUhanwzgSNFofQl7PdiaRQ5bYo5FABmDfs6JcG6U+zjMSl+Ojin9 MIME-Version: 1.0 X-Received: by 10.43.48.8 with SMTP id uu8mr872701icb.9.1379080060130; Fri, 13 Sep 2013 06:47:40 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Fri, 13 Sep 2013 06:47:39 -0700 (PDT) In-Reply-To: References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> Date: Fri, 13 Sep 2013 21:47:39 +0800 Message-ID: From: Qin Wang To: Thomas Watteyne Content-Type: multipart/related; boundary=bcaec529a0f519eb9f04e644193f Cc: 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 13:47:41 -0000 --bcaec529a0f519eb9f04e644193f Content-Type: multipart/alternative; boundary=bcaec529a0f519eb9d04e644193e --bcaec529a0f519eb9d04e644193e Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Thomas and All, I think the per-frequency report (or called per-channel report in ISA100.11a) is important, because PCE can use it to build black frequency list and update channel hopping sequence. But, I'm not sure if it makes implementation too complex or not. Thought? Qin On Fri, Sep 13, 2013 at 8:48 AM, Thomas Watteyne wrote: > Pouria, > Thanks again for the overview, which complements your first document > nicely. > > Alfredo, > Could you please elaborate what you mean by in-network processing? Are yo= u > referring to a distributed way for the nodes to "consume" this data, some > fusion as the data trickles up the DAG, or something else? > > Thomas > > > On Thu, Sep 12, 2013 at 12:34 AM, Alfredo Grieco > wrote: > >> Hi All,**** >> >> ** ** >> >> Do you think is it feasible to add a bit/flag that allows some form of >> in-network processing ? **** >> >> ** ** >> >> This would be very useful to distributed/decentralized scheduling >> techniques and should not cost that much.**** >> >> ** ** >> >> Any thoughts is welcome.**** >> >> ** ** >> >> Cheers**** >> >> ** ** >> >> Alfredo**** >> >> ** ** >> >> *Da:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *Per conto >> di *P.Zand@utwente.nl >> *Inviato:* Wednesday, September 11, 2013 10:45 PM >> *A:* xvilajosana@eecs.berkeley.edu; watteyne@eecs.berkeley.edu >> *Cc:* 6tsch@ietf.org >> *Oggetto:* Re: [6tsch] report flow contents**** >> >> ** ** >> >> Thomas,**** >> >> I agree with you that "source route failed" and "graph route failed" are >> out of scope of 6TiSCH.**** >> >> Regarding to you question about the per-channel report, I think they are >> based on each radio channel supported by the specification (channel 11-2= 6 >> in 2.4GHz in IEEE 802.15.4), not channel offset. And a channel report >> generated for all neighbor.**** >> >> Regarding to your first question, let me now explain more. I think both >> of these standard provide a mechanisms to make it possible for >> System/Network Manager to also read (pull) desired attributes (But not a= ll >> the feature in 6TiSCH). For example in WirelessHART [1], by =93Report >> Neighbor Health List=94 request, the network manager might mention the n= umber >> of neighbors to be read in =93Number of Neighbor entries read=94 field..= **** >> >> I think, ISA100.11a provides more mechanisms for System manager to get >> the desired attributes from the field devices. And the first two feature= s >> that you mentioned might also be supported by ISA100.11a.**** >> >> In ISA100.11a, three mechanisms are provided for reporting diagnostic >> information contained in dlmo.NeighborDiag (described in section 1 later= ) >> and dlmo.ChannelDiag (described in Section 2 later):**** >> >> 1. The health reports concentrator object (HRCO), can be configured >> to report any attribute in the DL *on a* *periodic basis*. >> dlmo.NeighborDiag entries (shown in Table 2) and dlmo.ChannelDiag (sh= own in >> Table 5) can be reported through that mechanism. Through the HRCO, th= e >> system manager can configure the device to report NeighborDiag >> periodically, such as every 30 minutes. Following each such report, o= n a >> per-entry basis, NeighborDiag counts shall be reset to zero. Levels s= hall >> use the current value as a starting point for the next period [2].***= * >> 2. Diagnostic information can be retrieved at any time by the system >> manager, by reading the applicable attributes. The system manager can= read >> (poll) NeighborDiag as a read-only attribute *on a per-entry basis*. >> As in an HRCO report, counts shall be reset to zero when read [2].***= * >> 3. Diagnostic information can be reported by the DL on *an exception >> basis*, through the DL_Connectivity alert (Described in section >> 3(a)). The DL can additionally be configured, through the dlmo.AlertP= olicy >> attribute (shown in Table 6), to report NeighborDiag information when >> diagnostic values exceed a threshold. Only the row triggering the ale= rt is >> reported. No values are reset [2]. **** >> >> ** ** >> >> In ISA100.11a, the system manager establishes a DL communication >> relationship between a device and its neighbor by adding an entry to the >> device=92s dlmo.Neighbor attribute (see Table 1). Each such entry specif= ies a >> level of diagnostics to be collected, through the field >> dlmo.Neighbor[].DiagLevel. For each neighbor, diagnostics may be collect= ed >> at a baseline level, or a detailed level including clock diagnostics [2]= . >> This levels are described in Section 1.**** >> >> *Table **1. dlmo.Neighbor fields [2]* >> >> *Field name* >> >> *Field encoding* >> >> * Index (16-bit address of neighbor)**** >> >> ExtDlUint (used as an index)**** >> >> EUI64 (EUI-64 identifier of the neighbor)**** >> >> Type: Unsigned64**** >> >> =85**** >> >> =85**** >> >> *DiagLevel* (selection of neighbor diagnostics to collect)**** >> >> Type: Unsigned2**** >> >> Bit0 =3D 1 Collect link diagnostics**** >> >> Bit1 =3D 1 Collect clock diagnostics**** >> >> =85**** >> >> =85**** >> >> ** ** >> >> When the dlmo.Neighbor[].DiagLevel field is set for a particular >> neighbor, the DL shall create corresponding entries in the read-only >> attribute dlmo.NeighborDiag. NeighborDiag values are accumulated from th= e >> time that the dlmo.NeighborDiag entry is created [2].**** >> >> ***1. ****dlmo.NeighborDiag:* >> >> dlmo.NeighborDiag is an indexed OctetString collection that contains >> diagnostics for a set of neighbors. The attribute is read-only, with row= s >> created as needed by the DL [2].**** >> >> NeighborDiag entries are instantiated by the system manager, by setting >> dlmo.Neighbor[].DiagLevel bits to non-zero values. Iff (if and only if) >> Bit0=3D1, then summary diagnostics shall be collected for the neighbor, >> consolidated across all channels. Iff Bit1=3D1, then detailed clock >> diagnostics shall be collected for the neighbor, consolidated across all >> radio channels [2].**** >> >> *Table **2. dlmo.NeighborDiag fields [2]* >> >> Field name**** >> >> Field encoding**** >> >> * Index**** >> >> Type: ExtDlUint (neighbor address, used as an index)**** >> >> *Summary* >> >> Type: OctetString (see Table 3)**** >> >> *ClockDetail* >> >> Type: OctetString (see Table 4)**** >> >> ** ** >> >> *Table **3. Diagnostic Summary OctetString fields [2]* >> >> Field name**** >> >> Field encoding**** >> >> RSSI (level)**** >> >> Type: Integer8**** >> >> RSQI (level)**** >> >> Type: Unsigned8**** >> >> RxDPDU (count)**** >> >> Type: ExtDlUint**** >> >> TxSuccessful (count)**** >> >> Type: ExtDlUint**** >> >> TxFailed (count)**** >> >> Type: ExtDlUint**** >> >> TxCCA_Backoff (count)**** >> >> Type: ExtDlUint**** >> >> TxNACK (count)**** >> >> Type: ExtDlUint**** >> >> ClockSigma (level)**** >> >> Type: Integer16**** >> >> ** ** >> >> *Table **4. Diagnostic ClockDetail OctetString fields [2]* >> >> Field name**** >> >> Field encoding**** >> >> ClockBias (level, signed)**** >> >> Type: Integer16**** >> >> ClockCount (count)**** >> >> Type: ExtDlUint**** >> >> ClockTimeout (count)**** >> >> Type: ExtDlUint**** >> >> ClockOutliers (count)**** >> >> Type: ExtDlUint**** >> >> ** ** >> >> **2. ***dlmo.ChannelDiag*:**** >> >> dlmo.ChannelDiag is a read-only dynamic attribute that reports DPDU >> transmit failure rates on each radio channel supported by the >> specification. This enables the system manager to be aware of consistent >> connectivity problems on a per-channel basis, as a diagnostic for spectr= um >> management in a subnet [2].**** >> >> Two diagnostics are reported for each channel, each indicating a >> different type of failure. **** indicates the percentage of time that >> unicast DPDU transmissions on channel N did not receive an ACK or a NACK= . >> **** indicates the percentage of time that unicast DPDU transmissions on >> channel N were aborted due to CCA. [2]**** >> >> *Table **5. dlmo.ChannelDiag fields* >> >> Field name**** >> >> Field encoding**** >> >> Count (Number of attempted unicast transmissions for all channels)**** >> >> Type:Unsigned16**** >> >> **** (Percentage of time transmissions on channel 0 did not receive an >> ACK)**** >> >> Type: Integer8**** >> >> **** (Percentage of time transmissions on channel 0 aborted due to CCA)*= * >> ** >> >> Type: Integer8**** >> >> =85**** >> >> ** ** >> >> **** (Percentage of time transmissions on channel 15 did not receive an >> ACK)**** >> >> Type: Integer8**** >> >> **** (Percentage of time transmissions on channel 15 aborted due to CCA)= * >> *** >> >> Type: Integer8**** >> >> ** ** >> >> ***3. ****Data link layer alerts* >> >> 1. *DL_Connectivity alert* >> >> DL performance diagnostics are accumulated in the attributes >> dlmo.NeighborDiag for *per-neighbor* diagnostics, and dlmo.ChannelDiag >> for *per-channel* diagnostics. Normally the system manager configures >> the HRCO to report these diagnostics periodically, and the DL automatica= lly >> resets the diagnostic counters whenever these attributes are so reported= . >> Between such reports, diagnostics may indicate a problem that needs to b= e >> reported to the system manager immediately. The DL_Connectivity alert >> provides the mechanism for the DL to report such issues, and the >> dlmo.AlertPolicy attribute enables the system manager to set thresholds = for >> such reporting [2].**** >> >> The attribute dlmo.AlertPolicy enables/disables the DL_Connectivity aler= t >> and provides thresholds to control whether alerts are reported. >> dlmo.AlertPolicy is an OctetString containing fields as shown in Table 6 >> [2].**** >> >> *Table **6. dlmo.AlertPolicy fields* >> >> Field name**** >> >> Field scalar type**** >> >> Descriptor (Enables or disabled the DL_Connectivity alert.)**** >> >> Type Alert report descriptor**** >> >> NeiMinUnicast (Minimum number of unicast transactions needed for a >> neighbor report.)**** >> >> Type: ExtDlUint**** >> >> NeiErrThresh (Report neighbor diagnostic if the percentage error rate >> reaches this threshold )**** >> >> Type: Unsigned8**** >> >> ChanMinUnicast (Minimum number of unicast transactions on a channel >> needed as a pre-condition for triggering an alert.)**** >> >> Type: ExtDlUint**** >> >> NoAckThresh (Report ChannelDiag if a NoAck value is greater than this >> threshold)**** >> >> Type: Unsigned8**** >> >> CCABackoffThresh (Report ChannelDiag if a CCABackoff value is greater >> than this threshold)**** >> >> Type: Unsigned8**** >> >> ** ** >> >> 1. *NeighborDiscovery alert*** >> >> The NeighborDiscovery alert provides a mechanism for the DL to report th= e >> contents of the OctetString in dlmo.Candidates attribute (see Table 7).*= * >> ** >> >> The neighbors in the dlmo.Neighbor attribute are set by the system >> manager, not by the device itself. The DL autonomously builds a list of >> candidate neighbors in the dlmo.Candidates attribute. This list is then >> forwarded to the system manager. The system manager considers the radio >> connectivity that is reported in dlmo.Candidates, but may also consider >> other criteria such as resource constraints, historical performance, or >> subnet topology [2].**** >> >> *Table **7. dlmo.Candidates OctetString fields* >> >> Field name**** >> >> Field encoding**** >> >> N (count of discovered neighbors)**** >> >> Type: Unsigned8**** >> >> Neighbor1 (16-bit address of first candidate)**** >> >> Type: ExtDlUint**** >> >> RSSI1 (radio signal quality of first candidate)**** >> >> Type: Integer8**** >> >> RSQI1 (radio signal quality of first candidate)**** >> >> Type: Unsigned8**** >> >> etc=85**** >> >> ** ** >> >> NeighborN (16-bit address of Nth candidate)**** >> >> Type: ExtDlUint**** >> >> RSSIN (radio signal quality of Nth candidate)**** >> >> Type: Integer8**** >> >> RSQIN (radio signal quality of Nth candidate)**** >> >> Type: Unsigned8**** >> >> ** ** >> >> *References* >> >> 1. IEC 62591: Industrial Communication Networks - Wireless >> Communication Network and Communication Profiles - WirelessHART.**** >> >> ** ** >> >> 2. IEC 62734: Industrial communication networks - Fieldbus >> specifications - Wireless systems for industrial automation: process >> control and related applications - ISA100.11a.**** >> >> ** ** >> >> ** ** >> >> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >> Behalf Of *Xavier Vilajosana Guillen >> *Sent:* Wednesday, September 11, 2013 8:54 PM >> *To:* Thomas Watteyne >> *Cc:* 6TSCH >> *Subject:* Re: [6tsch] report flow contents**** >> >> ** ** >> >> Hi Thomas, **** >> >> my 5 cents.**** >> >> I agree on adding NACK information and timing differences with other tha= n >> time source parent neighbors. I will add to the wiki :-)**** >> >> As regards to the differences of what we do at 6TiSCH and WHart or >> ISA100.11a, our proposal is more flexible and has less cohesion with a c= ost >> of increased complexity (e.g configurable data and reporting period). We >> have to analyse carefully what are the implications in terms of protocol >> complexity and implementation of that mechanism versus how often they wo= uld >> be used. Could we maybe define some "templates" or default configuration= s >> so using the 6TiSCH can be done without configuration overhead? Then >> configuration can be used for those that are really interested on tuning >> their system. **** >> >> just thoughts.. >> X**** >> >> ** ** >> >> ** ** >> >> On Wed, Sep 11, 2013 at 9:58 AM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote:**** >> >> Pouria,**** >> >> ** ** >> >> Wonderful list.**** >> >> ** ** >> >> Your document clearly highlights that (1) the "report" flows both in >> WirelessHART and ISA100.11a are strictly periodic and (1) they have a fi= xed >> format. From what we have discussed so far, the solutions we are develop= ing >> is different in the following ways:**** >> >> - 6TiSCH offers a mechanism allowing the PCE to configure what data >> it want to receive, and configure the trigger for a node to generate = from >> data.**** >> - 6TiSCH offers a mechanism allowing the PCE to query the data, on >> top of having the nodes push the information**** >> - In 6TiSCH, the format of the payload is not fixed. In particular, >> it is possible to add application-specific fields, allowing for exten= sions. >> **** >> - In 6TiSCH, the transport (CoAP?) and formatting (CBOR?) are >> IETF-friendly and integrate well in the IPv6 stack and associated mec= hanisms >> **** >> >> Did I get that right?**** >> >> ** ** >> >> A couple of questions:**** >> >> - the WirelessHART "alarms" correspond to a 6TiSCH "events". Yet, I >> suppose that a "source route failed" and "graph route failed" are out= of >> scope of 6TiSCH, but rather part of RPL. I would expect those to the = ICMPv6 >> messages. Thoughts?**** >> - About the per-channel report, I assume this is "per frequency", >> right? Is a channel report generated for each neighbor?**** >> - When comparing your list to *Xavi*'s >> https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents:**** >> >> >> - we might want to add a "numNACK" counter to the neighbor informatio= n >> **** >> - we might want to keep timing statistics for all neighbors, not >> just time source parents. That is, when I receive a packet from a = neighbor >> which is not my time source neighbor, I do not change my clock, bu= t I still >> know the timing error.**** >> >> Thomas**** >> >> ** ** >> >> On Wed, Sep 11, 2013 at 7:18 AM, wrote:**** >> >> Dear All,**** >> >> In the following, I listed the performance metrics reported to the >> Network/System Manager in WirelessHART and ISA100.11a.**** >> >> Some reports still need be added, for example the path failure alerts in >> ISA100.11a.**** >> >> Pouria**** >> >> **** >> >> *WirelessHART performance metrics***** >> >> In WirelessHART[1] network the statistics and events are reported to the >> Network Manager (act like PCE in 6TiSCH) through the following commands:= * >> *** >> >> 1. Report =93Device Health=94 **** >> >> This report is sent periodically toward the Network Manager. The report >> summaries the communication statistics of a device.**** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0-1**** >> >> Unsigned-16**** >> >> Number of packets generated by this device since last report**** >> >> 2-3**** >> >> Unsigned-16**** >> >> Number of packets terminated by this device since last report**** >> >> 4**** >> >> Unsigned-8**** >> >> Number of Data-Link Layer MAC MIC failures detected**** >> >> 5**** >> >> Unsigned-8**** >> >> Number of Network Layer (Session) MIC failures detected**** >> >> 6**** >> >> Enum-8**** >> >> Power Status**** >> >> 7**** >> >> Unsigned-8**** >> >> Number of CRC Errors detected**** >> >> **** >> >> 1. Report =93Neighbor Health List=94 **** >> >> This report is sent periodically toward the Network Manager. The report >> includes the statistics of linked neighbors.**** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0**** >> >> Unsigned-8**** >> >> Neighbor table index**** >> >> 1**** >> >> Unsigned-8**** >> >> Number of Neighbor entries read**** >> >> 2**** >> >> Unsigned-8**** >> >> Total number of neighbors**** >> >> 3-4**** >> >> Unsigned-16**** >> >> Nickname of neighbor**** >> >> 5**** >> >> Bit-8**** >> >> Neighbor Flags**** >> >> 6**** >> >> Signed-8**** >> >> Mean RSL (Receive Signal Level in dBm) since last report**** >> >> 7-8**** >> >> Unsigned-16**** >> >> Number of Packets transmitted to this neighbor**** >> >> 9-10**** >> >> Unsigned-16**** >> >> Number of Packets received from this neighbor**** >> >> 11-12**** >> >> Unsigned-16**** >> >> Packets received from this neighbor**** >> >> 13-=85**** >> >> **** >> >> Number of entries based on response byte 1**** >> >> **** >> >> 1. Report =93Neighbor Signal Levels=94**** >> >> This report is sent periodically toward the Network Manager. The report >> includes the statistics of discovered (but not linked) neighbors. These >> neighbors might be discovered when a device has heard the neighbor >> communication in the discovery links. A device that wish to join a netwo= rk, >> send a join request to the Network manager, including this report.**** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0**** >> >> Unsigned-8**** >> >> Neighbor table index**** >> >> 1**** >> >> Unsigned-8**** >> >> Number of Neighbor entries read**** >> >> 2**** >> >> Unsigned-8**** >> >> Total number of neighbors**** >> >> 3-4**** >> >> Unsigned-16**** >> >> Nickname of neighbor**** >> >> 5**** >> >> Signed-8**** >> >> RSL of neighbor in dB**** >> >> 6-8**** >> >> **** >> >> Repeats (as needed) based on response byte 1**** >> >> **** >> >> 1. Alarm =93Path Down=94 **** >> >> The alarm is sent upon detecting a path failure. **** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0-1**** >> >> Unsigned-16**** >> >> Nickname of neighbor to which path failure was detected**** >> >> **** >> >> 1. Alarm "Source Route Failed"**** >> >> This alarm is sent upon detecting a source route failure.**** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0-1**** >> >> Unsigned-16**** >> >> Nickname of unreachable neighbor in the source route**** >> >> 2-5**** >> >> Unsigned-32**** >> >> Network-Layer MIC (i.e., the MIC generated using the session key) from >> the NPDU that failed routing**** >> >> **** >> >> 1. Alarm "Graph Route Failed"**** >> >> This alarm is sent upon detecting a graph route failure.**** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0-1**** >> >> Unsigned-16**** >> >> Graph Id of the failed route**** >> >> **** >> >> >> **** >> >> **** >> >> *ISA100.11a performance metric***** >> >> In ISA100.11a[2], the L2 performance metrics are reported to the System >> Manager (act like PCE in 6TiSCH) and can be classified into (1) >> DL_Connectivity alert and (2) NeighborDiscovery alert.**** >> >> 1. DL_Connectivity alert**** >> >> The DL_connectivity alert can be classified into (a) Per-neighbor report= s >> and (b) Per-channel reports. **** >> >> - *Per-neighbor report***** >> >> Per-neighbor reports are the performance metrics about the neighbors >> connection and are reported to the System Manager. These statistics are >> accumulated in the =93dlmo.NeighborDiag=94 attribute, for each neighbor.= This >> report is similar to =93Neighbor Health List=94 report in WirelessHART. = **** >> >> Each node in ISA100.11a might be asked to report the following statistic= s >> about its neighbor:**** >> >> **** >> >> Octets**** >> >> Format**** >> >> Description**** >> >> 1**** >> >> Signed-8**** >> >> RSSI (level)**** >> >> 1**** >> >> Unsigned-8**** >> >> RSQI (level)**** >> >> 1-2**** >> >> ExtDLUint**** >> >> RxDPDU(count): Number of valid Packets received from this neighbor **** >> >> 1-2**** >> >> ExtDLUint**** >> >> TxSuccessful (count):Count of successful unicast transmissions to the >> neighbor **** >> >> 1-2**** >> >> ExtDLUint**** >> >> TxFailed (count): Number of unicast transmission, without getting any >> ACK or NACK**** >> >> 1-2**** >> >> ExtDLUint**** >> >> TxCCA_Backoff (count): Number of unicast transmission aborted due to CCA= * >> *** >> >> 1-2**** >> >> ExtDLUint**** >> >> TxNACK (count): Number of NACKs received**** >> >> 2**** >> >> Signed-16**** >> >> ClockSigma (level): A rough estimate of standard deviation of clock >> corrections**** >> >> **** >> >> - *Per-channel report***** >> >> In addition, in ISA100.11a, several performance metrics are reported >> based on channel for all neighbors to the System Manager. These statisti= cs >> are accumulated in the =93dlmo.ChannelDiag=94 attribute. This report is = similar >> to =93Device Health=94 report in WirelessHART.**** >> >> Byte**** >> >> Format**** >> >> Description**** >> >> 0-2**** >> >> Unsigned-16**** >> >> Count (Number of attempted unicast transmissions for all channels)**** >> >> 3**** >> >> Integer-8**** >> >> (Percentage of time transmissions on channel 0 did not receive an ACK)**= * >> * >> >> 4**** >> >> Integer-8**** >> >> (Percentage of time transmissions on channel 0 aborted due to CCA)**** >> >> =85**** >> >> **** >> >> **** >> >> 33**** >> >> Integer-8**** >> >> (Percentage of time transmissions on channel 15 did not receive an ACK)*= * >> ** >> >> 34**** >> >> Integer-8**** >> >> (Percentage of time transmissions on channel 15 aborted due to CCA)**** >> >> **** >> >> 1. NeighborDiscovery alert**** >> >> In ISA100.11a, each node sends a report, including a list of candidate >> (overheard) neighbors, to the System Manager to make a potential new >> routing decisions. The =93dlmo.Candidates=94 attributed is used to store= those >> information in each node in the L2. This report is similar to the =93Nei= ghbor >> Signal Levels=94 report in WirelessHART.**** >> >> Octets**** >> >> Format**** >> >> Description**** >> >> 1**** >> >> Unsigned-8**** >> >> N (count of discovered neighbors)**** >> >> 0-2**** >> >> ExtDlUint**** >> >> address**** >> >> 0-1**** >> >> Signed-8**** >> >> **** >> >> 0-1**** >> >> Unsigned-8**** >> >> **** >> >> =85**** >> >> **** >> >> **** >> >> 0-2**** >> >> ExtDlUint**** >> >> address**** >> >> 0-1**** >> >> Signed-8**** >> >> **** >> >> 0-1**** >> >> Unsigned-8**** >> >> **** >> >> **** >> >> * ***** >> >> *References***** >> >> 1. IEC 62591: Industrial Communication Networks - Wireless >> Communication Network and Communication Profiles - WirelessHART.**** >> >> **** >> >> 2. IEC 62734: Industrial communication networks - Fieldbus >> specifications - Wireless systems for industrial automation: process >> control and related applications - ISA100.11a.**** >> >> **** >> >> **** >> >> **** >> >> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >> Behalf Of *Thomas Watteyne >> *Sent:* Saturday, September 07, 2013 7:43 PM >> *To:* Xavi Vilajosana >> *Cc:* Pascal Thubert (pthubert); 6tsch@ietf.org >> *Subject:* Re: [6tsch] report flow contents**** >> >> **** >> >> Xavi,**** >> >> Great, thanks!**** >> >> Thomas**** >> >> **** >> >> On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote:**** >> >> Hi, >> I created the scratchpad section in the wiki to keep ideas >> https://bitbucket.org/6tsch/meetings/wiki/Home >> >> >> and added the flow content information here. >> >> https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents**** >> >> have a nice weekend!**** >> >> X**** >> >> **** >> >> On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote:**** >> >> Hi Pascal, it is a good idea!**** >> >> I will collect that information and as Thomas put it at the wiki so we d= o >> not lose it. >> >> :-)**** >> >> X**** >> >> **** >> >> On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) < >> pthubert@cisco.com> wrote:**** >> >> Hello Xavi:**** >> >> **** >> >> At the call I mentioned we could use info on tracks and cells as well, >> probably on demand from the PCE.**** >> >> For instance, the PCE could observe energy levels over some cells for a >> while to make sure they are clean.**** >> >> **** >> >> What do you think?**** >> >> Pascal**** >> >> **** >> >> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >> Behalf Of *Xavier Vilajosana Guillen >> *Sent:* vendredi 6 septembre 2013 01:17 >> *To:* Thomas Watteyne >> *Cc:* 6tsch@ietf.org >> *Subject:* Re: [6tsch] report flow contents**** >> >> **** >> >> agreed!**** >> >> So the fields become:**** >> >> **** >> >> **** >> >> For each known neighbor:**** >> >> -ID**** >> >> -AVG RSSI in a running window**** >> >> -Latest RSSI**** >> >> -AVG LQI in a running window [optional]**** >> >> -Latest LQI [optional]**** >> >> -Num TX packets (option in case there is communication with that >> neighbor)**** >> >> -Num ACK packets (option in case there is communication with that >> neighbor)**** >> >> -Num RX packets (option in case there is communication with that >> neighbor)**** >> >> -Last ASN when it heart about that neighbor **** >> >> -Bundle: Num links in the Schedule to that neighbor**** >> >> -PDR per link [Optional -- or maybe best and worst PDR only]**** >> >> **** >> >> -Option Flag (weather there are optional TLV fields on that category)**= * >> * >> >> +(TLV objects)* **** >> >> **** >> >> -For each Queue:**** >> >> - Avg Queue length in a running window**** >> >> - Max Queue length in a running window (peak)**** >> >> - Current Queue length (?)**** >> >> - ASN of the oldest packet in the QUEUE?**** >> >> -Option Flag (weather there are optional TLV fields on that category= ) >> **** >> >> +(TLV objects)* **** >> >> **** >> >> -Time source parent**** >> >> -ID**** >> >> -Avg clock drift (correction done) in a running window**** >> >> -Latest clock correction**** >> >> -Parent changes (counter of how many times I changed my time source >> parent)**** >> >> -Option Flag (weather there are optional TLV fields on that category= ) >> **** >> >> +(TLV objects)* **** >> >> **** >> >> -Option Flag (weather there are optional TLV fields in other categories)= * >> *** >> >> +(TLV objects)* **** >> >> **** >> >> as regards to this:**** >> >> **** >> >> "Finally, do you envision a generic mechanism whereby the PCE can turn >> fields on/off, or triggered independently?"**** >> >> **** >> >> I see it as CoAP Options, where a set of bytes can be used as "clever >> bitmap" to tell what options are there, the parsing will decode option b= y >> option and will read the fields. In that way any combination of fields i= s >> supported.**** >> >> **** >> >> would that work?**** >> >> X**** >> >> **** >> >> On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote:**** >> >> Xavi,**** >> >> **** >> >> Fantastic!**** >> >> **** >> >> I believe PDR for each link might be too long to fit in a packet. While >> the mote will most likely keep that information, we could move that to t= he >> query flow, i.e. it is available to the PCE on-demand.**** >> >> **** >> >> Would you agree that the number of links in a bundle belongs to the >> neighbor? Of maybe we want a "bundle" category?**** >> >> **** >> >> In queuing, it might be interesting to see the age of the different >> packets, to be able to monitor latency.**** >> >> **** >> >> About LQI, there is no general consensus among vendors on what the >> definition is, or how exactly it is calculated. I would make it optional= . >> **** >> >> **** >> >> Also, it might be good to be able to add arbitrary fields to each >> category: neighbor, queue, time source neighbor.**** >> >> **** >> >> Finally, do you envision a generic mechanism whereby the PCE can turn >> fields on/off, or triggered independently?**** >> >> **** >> >> Thomas**** >> >> **** >> >> On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote:**** >> >> Hi Thomas, Diego,**** >> >> **** >> >> I agree that LQI should be there as well. I update here the list with >> Thomas suggestions. **** >> >> **** >> >> For each known neighbor:**** >> >> -ID**** >> >> -AVG RSSI in a running window**** >> >> -Latest RSSI**** >> >> -AVG LQI in a running window**** >> >> -Latest LQI**** >> >> -Num TX packets (option in case there is communication with that >> neighbor)**** >> >> -Num ACK packets (option in case there is communication with that >> neighbor)**** >> >> -Num RX packets (option in case there is communication with that >> neighbor)**** >> >> -Last ASN when it heart about that neighbor **** >> >> **** >> >> Other fields**** >> >> -Num links in the Schedule to that neighbor**** >> >> -For each link PDR**** >> >> -For each Queue:**** >> >> - Avg Queue length in a running window**** >> >> - Max Queue length in a running window (peak)**** >> >> - Current Queue length (?)**** >> >> -Time source parent**** >> >> -ID**** >> >> -Avg clock drift (correction done) in a running window**** >> >> -Latest clock correction**** >> >> -Parent changes (counter of how many times I changed my time source >> parent)**** >> >> **** >> >> -Option Flag (weather there are optional TLV fields)**** >> >> +(TLV objects)* **** >> >> **** >> >> **** >> >> Hope this makes sense.**** >> >> cheers! >> Xavi**** >> >> **** >> >> On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote:**** >> >> *[renamed thread]***** >> >> **** >> >> Xavi,**** >> >> **** >> >> A few thoughts:**** >> >> - the counters (numTx, etc) will only be present for neighbors the node >> has communicate with, so they should be optional in the packet.**** >> >> - you have focused on the topological information (which I think is the >> right one). It might be useful to gather other data related to >> synchronization or queuing.**** >> >> - I couldn't agree more with your suggestion to make it extensible. This >> does mean that we will need to state somewhere that a device need to ign= ore >> silently fields it does not understand.**** >> >> **** >> >> Thomas**** >> >> **** >> >> On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote:**** >> >> Hello, I guess that flows are getting defined and I started to think on >> the contents of the messages on that flows. Not sure if this is the righ= t >> time or I am going way far..**** >> >> **** >> >> According to the previous discussion I assume that the five flows are:**= * >> * >> >> **** >> >> ME-6TOP - Query Flow**** >> >> ME-6TOP - Action Flow**** >> >> **** >> >> 6TOP - ME - Report Flow**** >> >> 6TOP - ME - Event Flow**** >> >> 6TOP - ME - Request BW Flow**** >> >> **** >> >> I'd like to start defining the content of the messages in the Report Flo= w: >> **** >> >> **** >> >> The Report Flow: has to deal with the information that a node knows and >> has to be sent to the ME so the ME can compute the schedule among others= . >> Here I list the information that we can know in a mote and can be used = at >> the ME to compute the schedule (complete please if I miss something)**** >> >> **** >> >> For each known neighbor:**** >> >> -ID**** >> >> -AVG RSSI in a running window**** >> >> -Latest RSSI**** >> >> -Num TX packets**** >> >> -Num ACK packets**** >> >> -Num RX packets**** >> >> -Last ASN when it heart about that neighbor **** >> >> **** >> >> Other fields**** >> >> -Num links in the Schedule to that neighbor**** >> >> -For each link PDR**** >> >> **** >> >> **** >> >> Then we need to have some TLV like objects that can be used for >> ad-hoc/naive/other extensions of the reporting process. In that way we >> don't constraint the implementation of the scheduling alg. to that >> information.**** >> >> **** >> >> what do you think?**** >> >> X**** >> >> **** >> >> On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote:= * >> *** >> >> Hi all,**** >> >> **** >> >> In this thread, we will continue the discussion about Confirmation >> message. Here is some background information.**** >> >> **** >> >> Context: e.g.**** >> >> - node sends a report and want to know if the report is accepted., *= * >> ** >> >> - ME sends a action request and want to know if/when the action take= n. >> **** >> >> Options:**** >> >> (1) Nothing**** >> >> (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** >> >> (3) App-level ACK type**** >> >> (4) Use different flow (i.e. action flow)**** >> >> **** >> >> IMHO, different control flow may have different requirement for >> confirmation message.**** >> >> (1) Action Flow, needs a App-level confirmation, like Succ/Fail**** >> >> (2) Query Flow, automatically has the confirmation, i.e. the message >> packet corresponding to a specific query.**** >> >> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer >> option (1) and (3), i.e. the confirmation message is an option, but if a >> confirmation message is needed, it should be App-level Ack, instead of >> transport layer confirmation, which will give 6top more flexibility.**** >> >> **** >> >> What do you think?**** >> >> **** >> >> Thanks**** >> >> Qin**** >> >> **** >> >> **** >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> **** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> **** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> **** >> >> **** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> **** >> >> **** >> >> **** >> >> **** >> >> ** ** >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch**** >> >> ** ** >> > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --bcaec529a0f519eb9d04e644193e Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hi Thomas and All,

I think the per-freq= uency report (or called per-channel report in ISA100.11a) is important, bec= ause PCE can use it to build black frequency list and update channel hoppin= g sequence. But, I'm not sure if it makes implementation too complex or= not.

Thought?

Qin


On Fri, Sep 13, 201= 3 at 8:48 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu>= wrote:
Pouria,
Thanks again fo= r the overview, which complements your first document nicely.
Alfredo,
Could you please elaborate what you mean by in-netw= ork processing? Are you referring to a distributed way for the nodes to &qu= ot;consume" this data, some fusion as the data trickles up the DAG, or= something else?

Thomas


On Thu, Sep 12, 2013 at 12:34 AM, Alfredo Grieco <= span dir=3D"ltr"><alfredo.grieco@gmail.com> wrote:

Hi All,

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Do you t= hink is it feasible to add a bit/flag that allows some form of in-network p= rocessing ?

=A0

<= font color=3D"#1f497d" face=3D"Calibri">This wou= ld be very useful to distributed/decentralized scheduling techniques and sh= ould not cost that much.

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Any thou= ghts is welcome.

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Cheers

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Alfredo<= u>

=A0

Da: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] Per conto di P.Zand@utwente.nl
Inviato: Wednesday, Septembe= r 11, 2013 10:45 PM
A: xvilajosan= a@eecs.berkeley.edu; watteyne@eecs.berkeley.edu
Cc: 6tsch@ietf.org
Oggetto: Re: [6tsch] report flow contents

=A0

Thomas,

I agree with you that &quo= t;source route failed" and "graph route failed" are out of s= cope of 6TiSCH.

Regarding to you question = about the per-channel report, I think they are based on each radio channel = supported by the specification (channel 11-26 in 2.4GHz in IEEE 802.15.4), = not channel offset. And a channel report generated for all neighbor.=

Regardi= ng to your first question, let me now explain more. I think both of these s= tandard provide a mechanisms to make it possible for System/Network Manager= to also read (pull) desired attributes (But not all the feature in 6TiSCH)= . For example in WirelessHART [1], by =93Report Neighbor Health List=94 req= uest, the network manager might mention the number of neighbors to be read = in =93Number of Neighbor entries read=94 field..

I think= , ISA100.11a provides more mechanisms for System manager to get the desired= attributes from the field devices. And the first two features that you men= tioned might also be supported by ISA100.11a.

In ISA1= 00.11a, three mechanisms are provided for reporting diagnostic information = contained in dlmo.NeighborDiag (described in section 1 later) and dlmo.Chan= nelDiag (described in Section 2 later):

  1. The health reports concentrator object (HRCO), ca= n be configured to report any attribute in the DL on a periodic bas= is. dlmo.NeighborDiag entries (shown in Table 2) and dlmo.Channe= lDiag (shown in Table 5) can be reported through that mechanism. Through th= e HRCO, the system manager can configure the device to report NeighborDiag = periodically, such as every 30 minutes. Following each such report, on a pe= r-entry basis, NeighborDiag counts shall be reset to zero. Levels shall use= the current value as a starting point for the next period [2].
  2. Diagnostic information can= be retrieved at any time by the system manager, by reading the applicable = attributes. The system manager can read (poll) NeighborDiag as a read-only = attribute on a per-entry basis. As in an HRCO report, counts shall be reset to zero when read [2].
  3. Diagnostic information can= be reported by the DL on an exception = basis, through the DL_Connectivity alert (Described in section 3= (a)). The DL can additionally be configured, through the dlmo.AlertPolicy a= ttribute (shown in Table 6), to report NeighborDiag information when diagno= stic values exceed a threshold. Only the row triggering the alert is report= ed. No values are reset [2].

=A0

In ISA1= 00.11a, the system manager establishes a DL communication relationship betw= een a device and its neighbor by adding an entry to the device=92s dlmo.Nei= ghbor attribute (see Table 1). Each such entry specifies a level of diagnos= tics to be collected, through the field dlmo.Neighbor[].DiagLevel. For each= neighbor, diagnostics may be collected at a baseline level, or a detailed = level including clock diagnostics [2]. This levels are described in Section= 1.

<= b>Table 1. dlmo.Neighbor fields [2]

Field name=

Field encoding<= u>

* Index (16-bit address of neighbor)

ExtDlUint (used as an index)<= /u>

= EUI64 (EUI-64 identifier of the neighbor)=

Type: Unsigned64

= =85

= =85

DiagLevel (selection of neighbor diagnostics to collect)=

Type: Unsigned2<= /p>

Bit0 =3D 1 Colle= ct link diagnostics

Bit1 =3D 1 Collect clock diagnostics=

= =85

= =85

<= /div>

=A0

When the dlmo.Neighbor= [].DiagLevel field is set for a particular neighbor, the DL shall create co= rresponding entries in the read-only attribute dlmo.NeighborDiag. NeighborD= iag values are accumulated from the time that the dlmo.NeighborDiag entry i= s created [2].

1.=A0=A0=A0= =A0=A0 dlmo.NeighborDiag:

dlmo.NeighborDiag is an in= dexed OctetString collection that contains diagnostics for a set of neighbo= rs. The attribute is read-only, with rows created as needed by the DL [2].<= u>

Neighbo= rDiag entries are instantiated by the system manager, by setting dlmo.Neigh= bor[].DiagLevel bits to non-zero values. Iff (if and only if) Bit0=3D1, the= n summary diagnostics shall be collected for the neighbor, consolidated acr= oss all channels. Iff Bit1=3D1, then detailed clock diagnostics shall be co= llected for the neighbor, consolidated across all radio channels [2].

<= b>Table 2. dlmo.NeighborDiag fields [2]

= * Index

= Field name

= Field encoding

= Type: ExtDlUint (neighbor address, used as an index)=

<= span style=3D"font-size:11.0pt;font-family:"Calibri","sans-s= erif";font-weight:bold">Summary

Type: OctetString (see Table 3)<= u>

ClockDetail

Type: OctetString (see Table 4)<= u>

=A0

Table 3. = Diagnostic Summary OctetString fields [2]

= RSSI (level)

= RSQI (level)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= RxDPDU (count)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= TxSuccessful (count)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= TxFailed (count)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= TxCCA_Backoff (count)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= TxNACK (count)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= ClockSigma (level)

= Field name

= Field encoding

= Type: Integer8

= Type: Unsigned8

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

= Type: Integer16

<= u>=A0

<= b>Table 4. Diagnostic ClockDetail OctetString fields [2]

= ClockBias (level, signed)

= <= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= ClockCount (count)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= ClockTimeout (count)

<= td width=3D"264" valign=3D"top" style=3D"width:2.2in;border:solid windowtex= t 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt">

= ClockOutliers (count)

= Field name

= Field encoding

= Type: Integer16

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

<= u>=A0

2.=A0=A0=A0=A0=A0 = dlmo.ChannelDiag:

dlmo.ChannelDiag is a read-only dynamic attribute that reports DPDU= transmit failure rates on each radio channel supported by the specificatio= n. This enables the system manager to be aware of consistent connectivity p= roblems on a per-channel basis, as a diagnostic for spectrum management in = a subnet [2].

Two diagnostics are reported for each channel, = each indicating a different type of failure. indicates the percentage= of time that unicast DPDU transmissions on channel N did not receive an AC= K or a NACK. indicates the percentage of time that unicast DPDU transmi= ssions on channel N were aborted due to CCA. [2]

<= b>Table 5. dlmo.ChannelDiag fields

= Count (Number of attempted unicast transmissions for all chann= els)

= Field name

= Field encoding

Type:Unsigned16

(Percentage of time transmissions on channel 0 d= id not receive an ACK)

Type: Integer8

(Percentage of time transmissions on channel 0 a= borted due to CCA)

Type: Integer8

= =85

= =A0

(Percentage of time transmissions on channel 15 = did not receive an ACK)

Type: Integer8

(Percentage of time transmissions on channel 15 = aborted due to CCA)

Type: Integer8

=A0

3.=A0=A0=A0=A0=A0 Data link layer alerts<= /p>

  1. <= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif";font-weight:bold">DL_Connectivity alert<= u>

DL performance diagnostics are accumulated in the attributes dl= mo.NeighborDiag for per-neighbor diagnostics, and dlmo.ChannelDiag for per-channel diagnostics. Normally the system manager confi= gures the HRCO to report these diagnostics periodically, and the DL automat= ically resets the diagnostic counters whenever these attributes are so repo= rted. Between such reports, diagnostics may indicate a problem that needs t= o be reported to the system manager immediately. The DL_Connectivity alert = provides the mechanism for the DL to report such issues, and the dlmo.Alert= Policy attribute enables the system manager to set thresholds for such repo= rting [2].

The attribute dlmo.AlertPolicy enables/disables the DL_Connectivity = alert and provides thresholds to control whether alerts are reported. dlmo.= AlertPolicy is an OctetString containing fields as shown in Table 6 [2].=

<= b>Table 6. dlmo.AlertPolicy fields

= Field name

= Field scalar type

= Descriptor (Enables or disabled the DL_Connectivity alert.)=

Type Alert report descriptor<= /u>

NeiMinUnicast (M= inimum number of unicast transactions needed for a neighbor report.)=

Type: ExtDlUint

NeiErrThresh (Re= port neighbor diagnostic if the percentage error rate reaches this threshol= d )

Type: Unsigned8

ChanMinUnicast (= Minimum number of unicast transactions on a channel needed as a pre-conditi= on for triggering an alert.)

Type: ExtDlUint

= NoAckThresh (Report ChannelDiag if a NoAck value is greater th= an this threshold)

Type: Unsigned8

CCABackoffThresh= (Report ChannelDiag if a CCABackoff value is greater than this threshold)<= u>

Type: Unsigned8

=A0

  1. NeighborDiscovery alert

The NeighborDiscovery alert provides a mechanism for the DL to= report the contents of the OctetString in dlmo.Candidates attribute (see T= able 7).

The neighbors in the dlmo.Neighbor attribute are= set by the system manager, not by the device itself. The DL autonomously b= uilds a list of candidate neighbors in the dlmo.Candidates attribute. This = list is then forwarded to the system manager. The system manager considers = the radio connectivity that is reported in dlmo.Candidates, but may also co= nsider other criteria such as resource constraints, historical performance,= or subnet topology [2].

<= b>Table 7. dlmo.Candidates OctetString fields<= /b>

Field name

Field encoding

N (count of disc= overed neighbors)

Type: Unsigned8<= u>

Neighbor1 (16-bi= t address of first candidate)

Type: ExtDlUint<= u>

RSSI1 (radio sig= nal quality of first candidate)

Type: Integer8

RSQI1 (radio sig= nal quality of first candidate)

Type: Unsigned8<= u>

etc=85=

=A0

NeighborN (16-bi= t address of Nth candidate)

Type: ExtDlUint<= u>

RSSIN (radio sig= nal quality of Nth candidate)

Type: Integer8

RSQIN (radio sig= nal quality of Nth candidate)

Type: Unsigned8<= u>

=A0

Re= ferences

1.=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0 IEC 62591: Industrial Communication Networks - Wireless Com= munication Network and Communication Profiles - WirelessHART.=

=A0

2.=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0 IEC 62734: Industrial communication networks - Fieldbus specifica= tions - Wireless systems for industrial automation: process control and rel= ated applications - ISA100.11a.

=A0

<= font color=3D"#1f497d" face=3D"Calibri">= =A0

6tsch-bounces@ietf.org [ma= ilto:6tsch-boun= ces@ietf.org] On Behalf Of <= /b>Xavier Vilajosana Guillen
Sent: Wednesday, September 1= 1, 2013 8:54 PM
To: Thoma= s Watteyne
Cc: 6TSCH
<= b>Subject: Re: [6tsch] report f= low contents

=A0

Hi Thomas,

my 5 cents.

I agree on adding = NACK information and timing differences with other than time source parent = neighbors. I will add to the wiki :-)

As regards to t= he differences of what we do at 6TiSCH and WHart or ISA100.11a, our proposa= l is more flexible and has less cohesion with a cost of increased complexit= y (e.g configurable data and reporting period). We have to analyse carefull= y what are the implications in terms of protocol complexity and implementat= ion of that mechanism versus how often they would be used. Could we maybe d= efine some "templates" or default configurations so using the 6Ti= SCH can be done without configuration overhead? Then configuration can be u= sed for those that are really interested on tuning their system. =

just thoughts..
X

=A0=

=A0

On W= ed, Sep 11, 2013 at 9:58 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu> wr= ote:

Pouria,

=A0

Wonderful list.

=A0

Your document clearly highlights that (1)= the "report" flows both in WirelessHART and ISA100.11a are stric= tly periodic and (1) they have a fixed format. From what we have discussed = so far, the solutions we are developing is different in the following ways:=

  • 6TiSCH offers a m= echanism allowing the PCE to configure what data it want to receive, and co= nfigure the trigger for a node to generate from data.<= /font>
  • 6TiSCH offers=A0a mechanism allowing the PCE to que= ry the data, on top of having the nodes push the information<= /span>
  • In 6TiSCH, the format of the payload is not fixed. = In particular, it is possible to add application-specific fields, allowing = for extensions.
  • In 6TiSCH,=A0the transport (CoAP?) and formatting (= CBOR?) are IETF-friendly and integrate well in the IPv6 stack and associate= d mechanisms

= Did I get that right?=

=A0<= /span>

A couple of questions:

  • the = WirelessHART "alarms" correspond to a 6TiSCH "events". = Yet, I suppose that a "source route failed" and "graph route= failed" are out of scope of 6TiSCH, but rather part of RPL. I would e= xpect those to the ICMPv6 messages. Thoughts?
  • About the per-channel report, I assume this is &quo= t;per frequency", right? Is a channel report generated for each neighb= or?
  • When comparing your list to Xavi's=A0https://bitbucket.or= g/6tsch/meetings/wiki/report_flow_contents:=
    • we might= want to add a "numNACK" counter to the neighbor information
    • we might want to keep timing statistics for all nei= ghbors, not just time source parents. That is, when I receive a packet from= a neighbor which is not my time source neighbor, I do not change my clock,= but I still know the timing error.

Thomas

=A0

On Wed, Sep 11, 2013 at 7:18 AM, <P.Zand@utwente.nl> wrot= e:

Dear All,

In the following, I listed the p= erformance metrics reported to the Network/System Manager in WirelessHART a= nd ISA100.11a.

Some= reports still need be added, for example the path failure alerts in ISA100= .11a.

Pour= ia

=A0

WirelessHART performance metrics=

<= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif"">In WirelessHART[1] network the statistics and = events are reported to the Network Manager (act like PCE in 6TiSCH) through= the following commands:

  1. This re= port is sent periodically toward the Network Manager. The report summaries = the communication statistics of a device.

    Byte

    =

    Format

    Description<= /u>

    0-1

    <= /td>

    Unsigned-16<= /u>

    Number of packets generated by this = device since last report

    2-3

    <= /td>

    Unsigned-16<= /u>

    Number of packets terminated by this= device since last report

    4

    Unsigned-8

    Number of Data-Link Layer MAC MIC fa= ilures detected

    5

    Unsigned-8

    Number of Network Layer (Session) MI= C failures detected

    6

    Enum-8

    Power Status=

    7

    Unsigned-8

    Number of CRC Errors detected=

    =A0

    1. Report =93Neighbor Hea= lth List=94

    This report is sent pe= riodically toward the Network Manager. The report includes the statistics o= f linked neighbors.

    Byte

    =

    Format

    Description<= /u>

    0

    Unsigned-8

    Neighbor table index

    1

    Unsigned-8

    Number of Neighbor entries read

    2

    Unsigned-8

    Total number of neighbors

    3-4

    <= /td>

    Unsigned-16<= /u>

    Nickname of neighbor

    5

    Bit-8

    Neighbor Flags<= u>

    6

    Signed-8=

    Mean RSL (Receive Signal Level in dB= m) since last report

    7-8

    <= /td>

    Unsigned-16<= /u>

    Number of Packets transmitted to thi= s neighbor

    9-10

    =

    Unsigned-16<= /u>

    Number of Packets received from this= neighbor

    11-12

    Unsigned-16<= /u>

    Packets received from this neighbor<= /span>

    13-=85

    =A0

    <= /td>

    Number of entries based on response = byte 1

    =A0

    1. Report =93Neighbor Sig= nal Levels=94

    This report is sent pe= riodically toward the Network Manager. The report includes the statistics o= f discovered (but not linked) neighbors. These neighbors might be discovere= d when a device has heard the neighbor communication in the discovery links= . A device that wish to join a network, send a join request to the Network = manager, including this report.

    Byte

    =

    Format

    Description<= /u>

    0

    Unsigned-8

    Neighbor table index

    1

    Unsigned-8

    Number of Neighbor entries read

    2

    Unsigned-8

    Total number of neighbors

    3-4

    <= /td>

    Unsigned-16<= /u>

    Nickname of neighbor

    5

    Signed-8=

    RSL of neighbor in dB<= u>

    6-8

    <= /td>

    =A0

    <= /td>

    Repeats (as needed) based on respons= e byte 1

    =A0

    1. Alarm =93Path Down=94 =

    The alarm is sent upon= detecting a path failure.

    Byte=

    Format

    Descriptio= n

    0-1

    Unsigned-16

    Nickname of neighbor to which path failure was detected

    =A0

    1. This al= arm is sent upon detecting a source route failure.<= /u>

      Byte

      =

      Format

      Description<= /u>

      0-1

      <= /td>

      Unsigned-16<= /u>

      Nickname of unreachable neighbor in = the source route

      2-5

      <= /td>

      Unsigned-32<= /u>

      Network-Layer MIC (i.e., the MIC gen= erated using the session key) from the NPDU that failed routing

      =A0

      1. This al= arm is sent upon detecting a graph route failure.

        Byte

        =

        Format

        Description<= /u>

        0-1

        <= /td>

        Unsigned-16<= /u>

        Graph Id of the failed route<= /font>

        =A0

        =A0

        ISA100.11a performance metric

        <= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif"">In ISA100.11a[2], the L2 performance metrics a= re reported to the System Manager (act like PCE in 6TiSCH) and can be class= ified into (1) DL_Connectivity alert and (2) NeighborDiscovery alert.

        1. The DL= _connectivity alert can be classified into (a) Per-neighbor reports and (b)= Per-channel reports.

            • Per-neighbor report=

          Per-neighbor reports are the=A0 performance metrics abou= t the neighbors connection and are reported to the System Manager. These st= atistics are accumulated in the =93dlmo.NeighborDiag=94 attribute, for each= neighbor. This report is similar to =93Neighbor Health List=94 report in W= irelessHART.

          Each node i= n ISA100.11a might be asked to report the following statistics about its ne= ighbor:

          =A0<= /font>

          Octets

          Format

          Description<= /u>

          1

          Signed-8=

          RSSI (level)=

          1

          Unsigned-8

          RSQI (level)=

          1-2

          <= /td>

          ExtDLUint

          RxDPDU(count): Number of valid Packe= ts received from this neighbor

          1-2<= u>

          ExtDLUint

          TxSuccessful (count):Count of successful unicast transmissions to= the neighbor

          1-2<= /span>

          ExtDLUint

          TxFailed (count): Number of unicast transmission, without=A0 gett= ing any ACK or NACK

          1-2<= /span>

          ExtDLUint

          TxCCA_Backoff (count): Number of unicast transmission aborted due= to CCA

          1-2<= /span>

          ExtDLUint

          TxNACK (count): Number of NACKs received<= /u>

          2

          Signed-16

          ClockSigma (level): A rough estimate of standard deviation of clo= ck corrections

          =A0

            • Per-channel report<= /b>

          In addition, in ISA100.11a, several performance metrics = are reported based on channel for all neighbors to the System Manager. Thes= e statistics are accumulated in the =93dlmo.ChannelDiag=94 attribute. This = report is similar to =93Device Health=94 report in WirelessHART.

          Byte

          =

          Format

          Description<= /u>

          0-2

          <= /td>

          Unsigned-16<= /u>

          Count (Number of attempted unicast t= ransmissions for all channels)

          3=

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 0 did not receive an ACK)

          4

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 0 aborted due to CCA)

          =85<= /span>

          =A0

          =A0

          33

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 15 did not receive an ACK)

          34

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 15 aborted due to CCA)

          =A0

          1. In ISA= 100.11a, each node sends a report, including a list of candidate (overheard= ) neighbors, to the System Manager to make a potential new routing decision= s. The =93dlmo.Candidates=94 attributed is used to store those information = in each node in the L2. This report is similar to the =93Neighbor Signal Le= vels=94 report in WirelessHART.

            Octets

            Format

            Description<= /u>

            1

            Unsigned-8

            N (count of discovered neighbors)

            0-2

            <= /td>

            ExtDlUint

            address

            0-1<= /span>

            Signed-8

            <= /span>

            0-1<= /span>

            Unsigned-8

            <= /span>

            =85<= /span>

            =A0

            =A0

            0-2<= /span>

            ExtDlUint

            <= font face=3D"Calibri">address

            0-1<= /span>

            Signed-8

            <= /span>

            0-1<= /span>

            Unsigned-8

            <= /span>

            =A0=

            =A0

            References

            1.=A0= =A0=A0=A0=A0=A0 IEC 62591: Industrial Communication Networks - Wireless Communicati= on Network and Communication Profiles - WirelessHART.<= u>

            =A0<= /font>

            2.=A0= =A0=A0=A0=A0=A0 IEC 62734: Industrial communication networks - Fieldbus specificati= ons - Wireless systems for industrial automation: process control and relat= ed applications - ISA100.11a.

            =A0<= /span>

            = =A0

            =A0<= /span>

            From: 6tsch-bounces@ietf.= org [mailto:6tsch-bounces@ietf.org] On Behalf = Of Thomas Watteyne
            Sent: Saturday, September 07= , 2013 7:43 PM
            To: Xavi V= ilajosana
            Cc: Pascal Thub= ert (pthubert); 6tsch@i= etf.org
            Subject: Re: [6tsch] report = flow contents

            =A0

            Xavi,

            Great, thanks!=

            Thomas

            =A0

            On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen <xvilajosana@e= ecs.berkeley.edu> wrote:

            Hi,
            I created the scra= tchpad section in the wiki to keep ideas
            https://bitbucket.org/6tsch/m= eetings/wiki/Home


            and added the flow content information here.

            https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents

            have a nice weekend!

            X

            =A0

            On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:=

            Hi Pascal, it is a good id= ea!

            I will collect that information= and as Thomas put it at the wiki so we do not lose it.

            :-)

            X

            = =A0

            On Fri, Sep 6, 2013 at 8:51= AM, Pascal Thubert (pthubert) <pthubert@cisco.com> wrote:

            Hello Xavi:

            =A0<= /span>

            = At the call I mentioned we could use info on tra= cks and cells as well, probably on demand from the PCE.

            For = instance, the PCE could observe energy levels over some cells for=A0 a whil= e to make sure they are clean.

            =A0<= /span>

            = What do you think?

            Pascal

            =A0

            From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana= Guillen
            Sent: vendredi 6 septembre 2= 013 01:17
            To: Thomas Watt= eyne
            Cc: 6tsch@ietf.org
            Subject: Re: [6tsch] report = flow contents

            =A0=

            agreed!

            So the fields become= :

            =A0

            =A0=

            For each known = neighbor:

            =A0-ID

            =A0-AVG RSSI in a running wind= ow

            =A0-Latest RSSI

            =A0-AVG LQI in a running= window [optional]

            =A0-Latest LQI [optional]<= /p>

            =A0-Num TX packets (option in = case there is communication with that neighbor)=

            =A0-Num ACK packets (option in= case there is communication with that neighbor)

            =A0-Num RX packets (option in = case there is communication with that neighbor)=

            =A0-Last ASN when it hear= t about that neighbor=A0

            =A0-Bundle: Num links in the Schedule to that nei= ghbor

            =A0 =A0 =A0 -PDR per link [Opt= ional -- or maybe best and worst PDR only]

            <= /div>

            =A0

            =A0-Option Flag (weather there are op= tional TLV fields on that category)

            =A0

            =A0-For each Queue:<= /font>

            =A0 =A0 - Avg Queue length in = a running window

            =A0 =A0 - Max Queue length in a running window (peak)

            =A0 =A0 - Current Queue length= (?)

            =A0 =A0 - ASN of the oldest packet in the QUEUE?=

            =A0 =A0 -Option Flag (wea= ther there are optional TLV fields on that category)

            =A0 =A0 =A0 =A0 +(TLV objects)= *=A0

            =A0

            -Time source parent

            = =A0 =A0 -ID

            =A0 =A0 -Avg clock drift (corr= ection done) in a running window

            =

            =A0 =A0 -Latest clock correction

            =A0 =A0 -Parent changes (count= er of how many times I changed my time source parent)<= u>

            =A0 =A0 -Option Flag (wea= ther there are optional TLV fields on that category)

            =A0 =A0 +(TLV objects)*=A0

            = =A0

            -Option Flag (weather th= ere are optional TLV fields in other categories)

            =A0 =A0+(TLV objects)*=A0

            =A0

            as regards to this:

            =A0

            "Finally, do you envision= a generic mechanism whereby the PCE can turn fields on/off, or triggered i= ndependently?"

            =A0

            I see it as CoAP Options, where a set of b= ytes can be used as "clever bitmap" to tell what options are ther= e, the parsing will decode option by option and will read the fields. In th= at way any combination of fields is supported.<= /p>

            =A0

            would that work?

            X=

            =A0

            On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <watteyne@eecs.berkeley.edu= > wrote:

            Xavi,

            =A0

            Fantastic!

            =A0

            I believe PDR for each link might be too long to fit in a pac= ket. While the mote will most likely keep that information, we could move t= hat to the query flow, i.e. it is available to the PCE on-demand.=

            =A0

            Would you = agree that the number of links in a bundle belongs to the neighbor? Of mayb= e we want a "bundle" category?

            =A0

            In queuing= , it might be interesting to see the age of the different packets, to be ab= le to monitor latency.

            =A0

            About LQI,= there is no general consensus among vendors on what the definition is, or = how exactly it is calculated. I would make it optional.

            =A0

            Also, it m= ight be good to be able to add arbitrary fields to each category: neighbor,= queue, time source neighbor.

            =A0

            Finally, d= o you envision a generic mechanism whereby the PCE can turn fields on/off, = or triggered independently?

            <= span style=3D"font-size:12.0pt;color:#888888">=A0

            Thomas=

            =A0<= /u>

            On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajo= sana Guillen <xvilajosana@eecs.berkeley.edu> wrote:<= /font>

            Hi Thomas, Diego,

            =A0=

            I agree that LQI should be there as well. I update here the l= ist with Thomas suggestions.=A0

            <= p>=A0

            For each known neigh= bor:

            =A0-ID

            =A0-AVG RSSI in a running wind= ow

            =A0-Latest RSSI

            =A0-AVG LQI in a running= window

            <= span style=3D"font-size:9.5pt;font-family:"Arial","sans-seri= f"">=A0-Latest LQI

            =A0-Num TX packets (option in = case there is communication with that neighbor)=

            =A0-Num ACK packets (option in= case there is communication with that neighbor)

            =A0-Num RX packets (option in = case there is communication with that neighbor)=

            =A0-Last ASN when it hear= t about that neighbor=A0

            =A0

            Other fields<= /u>

            =A0-Num links in= the Schedule to that neighbor

            =A0 =A0 -For each link PDR

            =A0-For each Queue:

            =A0 =A0 - Avg Queue length in a running window<= /span>

            =A0 =A0 - Max Queue length in a running wind= ow (peak)

            =A0 =A0 - Current Queue length (?)

            -Time source parent

            =A0 =A0 -ID

            =A0 = =A0 -Avg clock drift (correction done) in a running window

            =A0 =A0 -Latest clock correction<= /p>

            =A0 =A0 -Parent changes (counter of how many times I chang= ed my time source parent)

            =A0

            -Option Fl= ag (weather there are optional TLV fields)

            =A0 =A0+(TLV objects)*=A0

            =A0

            =A0

            Hope this = makes sense.

            cheers!
            Xavi

            =A0

            On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <watteyne@eecs.berkeley.ed= u> wrote:

            [renamed = thread]

            =A0

            Xavi,<= /p>

            =A0<= /p>

            A few thoughts:=

            - the count= ers (numTx, etc) will only be present for neighbors the node has communicat= e with, so they should be optional in the packet.

            - you have focused on the top= ological information (which I think is the right one). It might be useful t= o gather other data related to synchronization or queuing.=

            - I couldn't agree more w= ith your suggestion to make it extensible. This does mean that we will need= to state somewhere that a device need to ignore silently fields it does no= t understand.

            =A0

            Thomas=

            =A0

            On Thu, Sep 5, 201= 3 at 11:15 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu> = wrote:

            Hello, I guess that flows are getting defined and I started to thin= k on the contents of the messages on that flows. Not sure if this is the ri= ght time or I am going way far..

            =A0

            According to the pr= evious discussion I assume that the five flows are:

            =A0

            ME-6TOP - = Query Flow

            ME-6TOP - Action Flow

            =A0

            6TOP - ME - Report Flow

            =

            6TOP - ME - Event Flow

            6TOP - ME - Request BW Flow

            =A0

            I'd like to start defining the content of the messages in= the Report Flow:

            =A0=

            The Report Flow: has to deal with the information that a node= knows and has to be sent to the ME so the ME can compute the schedule amon= g others. Here I list =A0the information that we can know in a mote and can= be used at the ME to compute the schedule (complete please if I miss somet= hing)

            =A0

            For each k= nown neighbor:

            =A0-ID

            =A0-AVG R= SSI in a running window

            =A0-Latest RSSI

            = = =A0-Num TX packets

            =A0-Num ACK packets

            =A0-Num RX packets

            =A0-Last ASN when it heart about that neighbor=A0

            =A0

            Other fields

            =A0= -Num links in the Schedule to that neighbor

            =A0 =A0 -For each link PDR

            =A0

            =A0

            Then we ne= ed to have some TLV like objects that can be used for ad-hoc/naive/other ex= tensions of the reporting process. In that way we don't constraint the = implementation of the scheduling alg. to that information.

            =A0

            = = what do you think?

            X

            =A0

            On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu>= ; wrote:

            Hi all,

            =A0

            In this thread, we will continue t= he discussion about Confirmation message. Here is some background informati= on.

            =A0

            Context: e.g.<= /font>

            =A0 =A0 - node sends a report and want to know if the report is accepted= .,=A0

            =A0 =A0 - ME sends a action request= and want to know if/when the action taken.

            Options:

            =A0 =A0(1) Nothing

            =A0 =A0(2) Rely on transport mechanism (e.g. confirmable CoAP message)

            = =A0 =A0(3) App-level ACK type

            =A0 =A0(4) Use different flow (i.e. action flow)=

            =A0

            IMHO, different control flow may have different requirement for confirma= tion message.

            =A0 =A0 (1) Action Flow, ne= eds a App-level confirmation, like Succ/Fail

            =A0 =A0 (2) Query Flow, automatically has the confirmation, i.e. the mes= sage packet corresponding to a specific query.<= /p>

            =A0= =A0 (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer op= tion (1) and (3), i.e. the confirmation message is an option, but if a conf= irmation message is needed, it should be App-level Ack, instead of transpor= t layer confirmation, which will give 6top more flexibility.<= u>

            =A0

            What do you think?

            =A0

            Thanks<= u>

            Qin

            =A0 =A0=A0

            =A0

            _______________________________________________
            6tsch mailing list
            6= tsch@ietf.org
            https://www.ietf.org/mailman/listinfo/6tsch<= u>

            =A0


            _______________________________________________
            6tsch mailing list
            6tsch@ietf.org
            http= s://www.ietf.org/mailman/listinfo/6tsch

            =A0


            _______________________________________________
            6tsch mailing list
            6tsch@ietf.org
            http= s://www.ietf.org/mailman/listinfo/6tsch

            =A0

            =A0<= u>


            _________________= ______________________________
            6tsch mailing list
            6tsch@ietf.org
            h= ttps://www.ietf.org/mailman/listinfo/6tsch            <= /p>

            =A0

            =A0=

            =A0

            =A0

<= /div>

=A0


_____= __________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch<= /p>

<= span style=3D"font-size:12.0pt">=A0



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


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for <6tsch@ietf.org>; Fri, 13 Sep 2013 06:50:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=137106; q=dns/txt; s=iport; t=1379080238; x=1380289838; h=from:to:subject:date:message-id:in-reply-to:mime-version; bh=aV8Yd3F/qkN3Z+F0yOQkI+7nYMA1gKuueY9ZcA91774=; b=YD+zcUYSf2ji/cCdNskyzBl8YKtncfKhB9UXMCyHoZ4lPBBy6B/aNqwu Du7WTCXkIItbmEdctf1GmGU7Ry+bFPLjJSbi8hWWSyCpgrQimpX+13cta RVb8Y1XlJZA2NIkbSfhvdi5DMRz+86yv7n4RK4FgD1A9Wj8JMa0t7ISli Q=; X-Files: coAP.pptx : 97774 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AisFAOsWM1KtJXG9/2dsb2JhbABbgkNEfwuCY74HgRwWdIIlAQEBBIELAQgEDQMBAgsdCTAUCQgCBAESCAaHdbobj0AgGIMegQADkCaBLpgagySCKg X-IronPort-AV: E=Sophos;i="4.90,898,1371081600"; d="xml'?pptx'72,48,322,150?scan'72,48,322,150,208,322,72,48,145,150,217?rels'72,48,322,150,208,322,72,48,145,150,217?jpeg'72,48,322,150,208,322,72,48,145,150,217,145?bin'72,48,322,150,208,322,72,48,145,150,217,145,217,322?png'72,48,322,150,208,322,72,48,145,150,217,145,217,322,150"; a="256355253" Received: from rcdn-core2-2.cisco.com ([173.37.113.189]) by rcdn-iport-9.cisco.com with ESMTP; 13 Sep 2013 13:50:37 +0000 Received: from xhc-rcd-x13.cisco.com (xhc-rcd-x13.cisco.com [173.37.183.87]) by rcdn-core2-2.cisco.com (8.14.5/8.14.5) with ESMTP id r8DDob9Q024447 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for <6tsch@ietf.org>; Fri, 13 Sep 2013 13:50:37 GMT Received: from xmb-rcd-x04.cisco.com ([169.254.8.21]) by xhc-rcd-x13.cisco.com ([173.37.183.87]) with mapi id 14.02.0318.004; Fri, 13 Sep 2013 08:50:37 -0500 From: "Raghuram Sudhaakar (rsudhaak)" To: "Raghuram Sudhaakar (rsudhaak)" , "6tsch@ietf.org" <6tsch@ietf.org> Thread-Topic: [6tsch] CoAP presentation for 9/13 Thread-Index: AQHOsIg57qY/uLqlLk2ILqCvFYzjFw== Date: Fri, 13 Sep 2013 13:50:36 +0000 Message-ID: <2C3A8CAFDCAFCA41B8BF705CD9471C5B185A9BDB@xmb-rcd-x04.cisco.com> In-Reply-To: <2C3A8CAFDCAFCA41B8BF705CD9471C5B185A7A62@xmb-rcd-x04.cisco.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.3.6.130613 x-originating-ip: [10.21.90.47] Content-Type: multipart/mixed; boundary="_004_2C3A8CAFDCAFCA41B8BF705CD9471C5B185A9BDBxmbrcdx04ciscoc_" MIME-Version: 1.0 Subject: Re: [6tsch] CoAP presentation for 9/13 X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 13:50:44 -0000 --_004_2C3A8CAFDCAFCA41B8BF705CD9471C5B185A9BDBxmbrcdx04ciscoc_ Content-Type: multipart/alternative; boundary="_000_2C3A8CAFDCAFCA41B8BF705CD9471C5B185A9BDBxmbrcdx04ciscoc_" --_000_2C3A8CAFDCAFCA41B8BF705CD9471C5B185A9BDBxmbrcdx04ciscoc_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Fixed a typo in the title. Thanks Carsten for the catch. -raghuram From: raghuram sudhaakar > Date: Thursday, September 12, 2013 7:04 PM To: "6tsch@ietf.org" <6tsch@ietf.org> Subject: [6tsch] CoAP presentation for 9/13 All, Attached is the presentation that Xavi and I compiled for discussion tomorr= ow. -raghuram --_000_2C3A8CAFDCAFCA41B8BF705CD9471C5B185A9BDBxmbrcdx04ciscoc_ Content-Type: text/html; charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable
Fixed a typo in the title. 

Thanks Carsten for the catch.

-raghuram

From: raghuram sudhaakar <rsudhaak@cisco.com>
Date: Thursday, September 12, 2013 = 7:04 PM
To: "6tsch@ietf.org" <6ts= ch@ietf.org>
Subject: [6tsch] CoAP presentation = for 9/13

All,
Attached is the presentation that Xavi and I compiled for discussion t= omorrow. 

-raghuram
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UEsBAi0AFAAGAAgAAAAhACXQiG6WAQAAZgMAABEAAAAAAAAAAAAAAAAAsFcBAHBwdC92aWV3UHJv cHMueG1sUEsBAi0AFAAGAAgAAAAhAD+FuHFDAgAAKAsAABMAAAAAAAAAAAAAAAAAdVkBAHBwdC90 YWJsZVN0eWxlcy54bWxQSwECLQAUAAYACAAAACEAqIe1kNQCAACiBgAAEAAAAAAAAAAAAAAAAADp WwEAZG9jUHJvcHMvYXBwLnhtbFBLAQItABQABgAIAAAAIQAko5TBgAEAAMsCAAARAAAAAAAAAAAA AAAAAPNfAQBkb2NQcm9wcy9jb3JlLnhtbFBLAQItABQABgAIAAAAIQC9bprf7QMAAMskAAAoAAAA AAAAAAAAAAAAAKpiAQBwcHQvcHJpbnRlclNldHRpbmdzL3ByaW50ZXJTZXR0aW5nczEuYmluUEsF BgAAAABNAE0A+xYAAN1mAQAAAA== --_004_2C3A8CAFDCAFCA41B8BF705CD9471C5B185A9BDBxmbrcdx04ciscoc_-- From diego.dujovne@mail.udp.cl Fri Sep 13 07:23:13 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 60B4321E8055 for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 07:23:13 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0 X-Spam-Level: X-Spam-Status: No, score=x tagged_above=-999 required=5 tests=[] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UAob9tK9+NKl for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 07:23:13 -0700 (PDT) Received: from mail-wi0-f182.google.com (mail-wi0-f182.google.com [209.85.212.182]) by ietfa.amsl.com (Postfix) with ESMTP id 5360421E809C for <6tsch@ietf.org>; Fri, 13 Sep 2013 07:23:06 -0700 (PDT) Received: by mail-wi0-f182.google.com with SMTP id ez12so888589wid.3 for <6tsch@ietf.org>; Fri, 13 Sep 2013 07:23:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=iztsCuqTm3uB6ETp8GeV99ynFYYwnf52vnjaVBu/5Z4=; b=bPiGjj/EOmHBCDKYduD9wLzqyPYCa8VtnW1sL+m7g2m4Bs6nt1ciVlK0ylTe/1hbMU pyI3sM1aUfQRTazY+GX+8t137O3yfmh7vfTBhYcbv4PmepLAjAlfocDxjA7W5hTH5MpM xxWy0KHzJOXR9wDlpMkL0Z4jWq4EbIs+l5alkdWUEYFLEf8oAZ4qU7IV8zduqt83Ekbe DRNcdxncIkFup53XxNQfWvpgKtyfJGSvIjUBj0/mytpsZt/n5wc6O2g5q+omiPjGe90K uLd7DTdxSuW2TIRe68tnFlx5iBVvJJrjPdiAeg90IASDRO3zS8z0Ed3cawaECknWI/ln 1oPQ== X-Gm-Message-State: ALoCoQnTnS5UJPEkgpDfdyPiWOIU7gMRJPttbVOiGSOBywgcguYeUscfffa8fylcbHzny7mVOPLU MIME-Version: 1.0 X-Received: by 10.180.36.231 with SMTP id t7mr2717614wij.53.1379082183480; Fri, 13 Sep 2013 07:23:03 -0700 (PDT) Received: by 10.194.122.103 with HTTP; Fri, 13 Sep 2013 07:23:02 -0700 (PDT) In-Reply-To: References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> Date: Fri, 13 Sep 2013 11:23:02 -0300 Message-ID: From: "Prof. Diego Dujovne" To: Qin Wang Content-Type: multipart/related; boundary=e89a8f6466f7a9a54304e64497b3 Cc: Thomas Watteyne , 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 14:23:13 -0000 --e89a8f6466f7a9a54304e64497b3 Content-Type: multipart/alternative; boundary=e89a8f6466f7a9a53f04e64497b2 --e89a8f6466f7a9a53f04e64497b2 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hello Qin, I think that a per-frequency report will help the PCE to decide which frequency to use, and maybe temporarily black-list them. For example, a dynamic scheme may include sampling the blacklisted frequencies every X minutes to re-enable them once the interference has disappeared. This will require the node to refresh the RSSI and LQI values in a opportunistic way (every time the a cell uses that frequency) to save energy. Any thoughts? Diego 2013/9/13 Qin Wang > Hi Thomas and All, > > I think the per-frequency report (or called per-channel report in > ISA100.11a) is important, because PCE can use it to build black frequency > list and update channel hopping sequence. But, I'm not sure if it makes > implementation too complex or not. > > Thought? > > Qin > > > On Fri, Sep 13, 2013 at 8:48 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote: > >> Pouria, >> Thanks again for the overview, which complements your first document >> nicely. >> >> Alfredo, >> Could you please elaborate what you mean by in-network processing? Are >> you referring to a distributed way for the nodes to "consume" this data, >> some fusion as the data trickles up the DAG, or something else? >> >> Thomas >> >> >> On Thu, Sep 12, 2013 at 12:34 AM, Alfredo Grieco < >> alfredo.grieco@gmail.com> wrote: >> >>> Hi All,**** >>> >>> ** ** >>> >>> Do you think is it feasible to add a bit/flag that allows some form of >>> in-network processing ? **** >>> >>> ** ** >>> >>> This would be very useful to distributed/decentralized scheduling >>> techniques and should not cost that much.**** >>> >>> ** ** >>> >>> Any thoughts is welcome.**** >>> >>> ** ** >>> >>> Cheers**** >>> >>> ** ** >>> >>> Alfredo**** >>> >>> ** ** >>> >>> *Da:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *Per conto >>> di *P.Zand@utwente.nl >>> *Inviato:* Wednesday, September 11, 2013 10:45 PM >>> *A:* xvilajosana@eecs.berkeley.edu; watteyne@eecs.berkeley.edu >>> *Cc:* 6tsch@ietf.org >>> *Oggetto:* Re: [6tsch] report flow contents**** >>> >>> ** ** >>> >>> Thomas,**** >>> >>> I agree with you that "source route failed" and "graph route failed" ar= e >>> out of scope of 6TiSCH.**** >>> >>> Regarding to you question about the per-channel report, I think they ar= e >>> based on each radio channel supported by the specification (channel 11-= 26 >>> in 2.4GHz in IEEE 802.15.4), not channel offset. And a channel report >>> generated for all neighbor.**** >>> >>> Regarding to your first question, let me now explain more. I think both >>> of these standard provide a mechanisms to make it possible for >>> System/Network Manager to also read (pull) desired attributes (But not = all >>> the feature in 6TiSCH). For example in WirelessHART [1], by =93Report >>> Neighbor Health List=94 request, the network manager might mention the = number >>> of neighbors to be read in =93Number of Neighbor entries read=94 field.= . *** >>> * >>> >>> I think, ISA100.11a provides more mechanisms for System manager to get >>> the desired attributes from the field devices. And the first two featur= es >>> that you mentioned might also be supported by ISA100.11a.**** >>> >>> In ISA100.11a, three mechanisms are provided for reporting diagnostic >>> information contained in dlmo.NeighborDiag (described in section 1 late= r) >>> and dlmo.ChannelDiag (described in Section 2 later):**** >>> >>> 1. The health reports concentrator object (HRCO), can be configured >>> to report any attribute in the DL *on a* *periodic basis*. >>> dlmo.NeighborDiag entries (shown in Table 2) and dlmo.ChannelDiag (s= hown in >>> Table 5) can be reported through that mechanism. Through the HRCO, t= he >>> system manager can configure the device to report NeighborDiag >>> periodically, such as every 30 minutes. Following each such report, = on a >>> per-entry basis, NeighborDiag counts shall be reset to zero. Levels = shall >>> use the current value as a starting point for the next period [2].**= * >>> * >>> 2. Diagnostic information can be retrieved at any time by the system >>> manager, by reading the applicable attributes. The system manager ca= n read >>> (poll) NeighborDiag as a read-only attribute *on a per-entry basis*. >>> As in an HRCO report, counts shall be reset to zero when read [2].**= * >>> * >>> 3. Diagnostic information can be reported by the DL on *an exception >>> basis*, through the DL_Connectivity alert (Described in section >>> 3(a)). The DL can additionally be configured, through the dlmo.Alert= Policy >>> attribute (shown in Table 6), to report NeighborDiag information whe= n >>> diagnostic values exceed a threshold. Only the row triggering the al= ert is >>> reported. No values are reset [2]. **** >>> >>> ** ** >>> >>> In ISA100.11a, the system manager establishes a DL communication >>> relationship between a device and its neighbor by adding an entry to th= e >>> device=92s dlmo.Neighbor attribute (see Table 1). Each such entry speci= fies a >>> level of diagnostics to be collected, through the field >>> dlmo.Neighbor[].DiagLevel. For each neighbor, diagnostics may be collec= ted >>> at a baseline level, or a detailed level including clock diagnostics [2= ]. >>> This levels are described in Section 1.**** >>> >>> *Table **1. dlmo.Neighbor fields [2]* >>> >>> *Field name* >>> >>> *Field encoding* >>> >>> * Index (16-bit address of neighbor)**** >>> >>> ExtDlUint (used as an index)**** >>> >>> EUI64 (EUI-64 identifier of the neighbor)**** >>> >>> Type: Unsigned64**** >>> >>> =85**** >>> >>> =85**** >>> >>> *DiagLevel* (selection of neighbor diagnostics to collect)**** >>> >>> Type: Unsigned2**** >>> >>> Bit0 =3D 1 Collect link diagnostics**** >>> >>> Bit1 =3D 1 Collect clock diagnostics**** >>> >>> =85**** >>> >>> =85**** >>> >>> ** ** >>> >>> When the dlmo.Neighbor[].DiagLevel field is set for a particular >>> neighbor, the DL shall create corresponding entries in the read-only >>> attribute dlmo.NeighborDiag. NeighborDiag values are accumulated from t= he >>> time that the dlmo.NeighborDiag entry is created [2].**** >>> >>> ***1. ****dlmo.NeighborDiag:* >>> >>> dlmo.NeighborDiag is an indexed OctetString collection that contains >>> diagnostics for a set of neighbors. The attribute is read-only, with ro= ws >>> created as needed by the DL [2].**** >>> >>> NeighborDiag entries are instantiated by the system manager, by setting >>> dlmo.Neighbor[].DiagLevel bits to non-zero values. Iff (if and only if) >>> Bit0=3D1, then summary diagnostics shall be collected for the neighbor, >>> consolidated across all channels. Iff Bit1=3D1, then detailed clock >>> diagnostics shall be collected for the neighbor, consolidated across al= l >>> radio channels [2].**** >>> >>> *Table **2. dlmo.NeighborDiag fields [2]* >>> >>> Field name**** >>> >>> Field encoding**** >>> >>> * Index**** >>> >>> Type: ExtDlUint (neighbor address, used as an index)**** >>> >>> *Summary* >>> >>> Type: OctetString (see Table 3)**** >>> >>> *ClockDetail* >>> >>> Type: OctetString (see Table 4)**** >>> >>> ** ** >>> >>> *Table **3. Diagnostic Summary OctetString fields [2]* >>> >>> Field name**** >>> >>> Field encoding**** >>> >>> RSSI (level)**** >>> >>> Type: Integer8**** >>> >>> RSQI (level)**** >>> >>> Type: Unsigned8**** >>> >>> RxDPDU (count)**** >>> >>> Type: ExtDlUint**** >>> >>> TxSuccessful (count)**** >>> >>> Type: ExtDlUint**** >>> >>> TxFailed (count)**** >>> >>> Type: ExtDlUint**** >>> >>> TxCCA_Backoff (count)**** >>> >>> Type: ExtDlUint**** >>> >>> TxNACK (count)**** >>> >>> Type: ExtDlUint**** >>> >>> ClockSigma (level)**** >>> >>> Type: Integer16**** >>> >>> ** ** >>> >>> *Table **4. Diagnostic ClockDetail OctetString fields [2]* >>> >>> Field name**** >>> >>> Field encoding**** >>> >>> ClockBias (level, signed)**** >>> >>> Type: Integer16**** >>> >>> ClockCount (count)**** >>> >>> Type: ExtDlUint**** >>> >>> ClockTimeout (count)**** >>> >>> Type: ExtDlUint**** >>> >>> ClockOutliers (count)**** >>> >>> Type: ExtDlUint**** >>> >>> ** ** >>> >>> **2. ***dlmo.ChannelDiag*:**** >>> >>> dlmo.ChannelDiag is a read-only dynamic attribute that reports DPDU >>> transmit failure rates on each radio channel supported by the >>> specification. This enables the system manager to be aware of consisten= t >>> connectivity problems on a per-channel basis, as a diagnostic for spect= rum >>> management in a subnet [2].**** >>> >>> Two diagnostics are reported for each channel, each indicating a >>> different type of failure. **** indicates the percentage of time that >>> unicast DPDU transmissions on channel N did not receive an ACK or a NAC= K. >>> **** indicates the percentage of time that unicast DPDU transmissions >>> on channel N were aborted due to CCA. [2]**** >>> >>> *Table **5. dlmo.ChannelDiag fields* >>> >>> Field name**** >>> >>> Field encoding**** >>> >>> Count (Number of attempted unicast transmissions for all channels)**** >>> >>> Type:Unsigned16**** >>> >>> **** (Percentage of time transmissions on channel 0 did not receive an >>> ACK)**** >>> >>> Type: Integer8**** >>> >>> **** (Percentage of time transmissions on channel 0 aborted due to CCA)= * >>> *** >>> >>> Type: Integer8**** >>> >>> =85**** >>> >>> ** ** >>> >>> **** (Percentage of time transmissions on channel 15 did not receive an >>> ACK)**** >>> >>> Type: Integer8**** >>> >>> **** (Percentage of time transmissions on channel 15 aborted due to CCA= ) >>> **** >>> >>> Type: Integer8**** >>> >>> ** ** >>> >>> ***3. ****Data link layer alerts* >>> >>> 1. *DL_Connectivity alert* >>> >>> DL performance diagnostics are accumulated in the attributes >>> dlmo.NeighborDiag for *per-neighbor* diagnostics, and dlmo.ChannelDiag >>> for *per-channel* diagnostics. Normally the system manager configures >>> the HRCO to report these diagnostics periodically, and the DL automatic= ally >>> resets the diagnostic counters whenever these attributes are so reporte= d. >>> Between such reports, diagnostics may indicate a problem that needs to = be >>> reported to the system manager immediately. The DL_Connectivity alert >>> provides the mechanism for the DL to report such issues, and the >>> dlmo.AlertPolicy attribute enables the system manager to set thresholds= for >>> such reporting [2].**** >>> >>> The attribute dlmo.AlertPolicy enables/disables the DL_Connectivity >>> alert and provides thresholds to control whether alerts are reported. >>> dlmo.AlertPolicy is an OctetString containing fields as shown in Table = 6 >>> [2].**** >>> >>> *Table **6. dlmo.AlertPolicy fields* >>> >>> Field name**** >>> >>> Field scalar type**** >>> >>> Descriptor (Enables or disabled the DL_Connectivity alert.)**** >>> >>> Type Alert report descriptor**** >>> >>> NeiMinUnicast (Minimum number of unicast transactions needed for a >>> neighbor report.)**** >>> >>> Type: ExtDlUint**** >>> >>> NeiErrThresh (Report neighbor diagnostic if the percentage error rate >>> reaches this threshold )**** >>> >>> Type: Unsigned8**** >>> >>> ChanMinUnicast (Minimum number of unicast transactions on a channel >>> needed as a pre-condition for triggering an alert.)**** >>> >>> Type: ExtDlUint**** >>> >>> NoAckThresh (Report ChannelDiag if a NoAck value is greater than this >>> threshold)**** >>> >>> Type: Unsigned8**** >>> >>> CCABackoffThresh (Report ChannelDiag if a CCABackoff value is greater >>> than this threshold)**** >>> >>> Type: Unsigned8**** >>> >>> ** ** >>> >>> 1. *NeighborDiscovery alert*** >>> >>> The NeighborDiscovery alert provides a mechanism for the DL to report >>> the contents of the OctetString in dlmo.Candidates attribute (see Table= 7). >>> **** >>> >>> The neighbors in the dlmo.Neighbor attribute are set by the system >>> manager, not by the device itself. The DL autonomously builds a list of >>> candidate neighbors in the dlmo.Candidates attribute. This list is then >>> forwarded to the system manager. The system manager considers the radio >>> connectivity that is reported in dlmo.Candidates, but may also consider >>> other criteria such as resource constraints, historical performance, or >>> subnet topology [2].**** >>> >>> *Table **7. dlmo.Candidates OctetString fields* >>> >>> Field name**** >>> >>> Field encoding**** >>> >>> N (count of discovered neighbors)**** >>> >>> Type: Unsigned8**** >>> >>> Neighbor1 (16-bit address of first candidate)**** >>> >>> Type: ExtDlUint**** >>> >>> RSSI1 (radio signal quality of first candidate)**** >>> >>> Type: Integer8**** >>> >>> RSQI1 (radio signal quality of first candidate)**** >>> >>> Type: Unsigned8**** >>> >>> etc=85**** >>> >>> ** ** >>> >>> NeighborN (16-bit address of Nth candidate)**** >>> >>> Type: ExtDlUint**** >>> >>> RSSIN (radio signal quality of Nth candidate)**** >>> >>> Type: Integer8**** >>> >>> RSQIN (radio signal quality of Nth candidate)**** >>> >>> Type: Unsigned8**** >>> >>> ** ** >>> >>> *References* >>> >>> 1. IEC 62591: Industrial Communication Networks - Wireless >>> Communication Network and Communication Profiles - WirelessHART.**** >>> >>> ** ** >>> >>> 2. IEC 62734: Industrial communication networks - Fieldbus >>> specifications - Wireless systems for industrial automation: process >>> control and related applications - ISA100.11a.**** >>> >>> ** ** >>> >>> ** ** >>> >>> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >>> Behalf Of *Xavier Vilajosana Guillen >>> *Sent:* Wednesday, September 11, 2013 8:54 PM >>> *To:* Thomas Watteyne >>> *Cc:* 6TSCH >>> *Subject:* Re: [6tsch] report flow contents**** >>> >>> ** ** >>> >>> Hi Thomas, **** >>> >>> my 5 cents.**** >>> >>> I agree on adding NACK information and timing differences with other >>> than time source parent neighbors. I will add to the wiki :-)**** >>> >>> As regards to the differences of what we do at 6TiSCH and WHart or >>> ISA100.11a, our proposal is more flexible and has less cohesion with a = cost >>> of increased complexity (e.g configurable data and reporting period). W= e >>> have to analyse carefully what are the implications in terms of protoco= l >>> complexity and implementation of that mechanism versus how often they w= ould >>> be used. Could we maybe define some "templates" or default configuratio= ns >>> so using the 6TiSCH can be done without configuration overhead? Then >>> configuration can be used for those that are really interested on tunin= g >>> their system. **** >>> >>> just thoughts.. >>> X**** >>> >>> ** ** >>> >>> ** ** >>> >>> On Wed, Sep 11, 2013 at 9:58 AM, Thomas Watteyne < >>> watteyne@eecs.berkeley.edu> wrote:**** >>> >>> Pouria,**** >>> >>> ** ** >>> >>> Wonderful list.**** >>> >>> ** ** >>> >>> Your document clearly highlights that (1) the "report" flows both in >>> WirelessHART and ISA100.11a are strictly periodic and (1) they have a f= ixed >>> format. From what we have discussed so far, the solutions we are develo= ping >>> is different in the following ways:**** >>> >>> - 6TiSCH offers a mechanism allowing the PCE to configure what data >>> it want to receive, and configure the trigger for a node to generate= from >>> data.**** >>> - 6TiSCH offers a mechanism allowing the PCE to query the data, on >>> top of having the nodes push the information**** >>> - In 6TiSCH, the format of the payload is not fixed. In particular, >>> it is possible to add application-specific fields, allowing for exte= nsions. >>> **** >>> - In 6TiSCH, the transport (CoAP?) and formatting (CBOR?) are >>> IETF-friendly and integrate well in the IPv6 stack and associated me= chanisms >>> **** >>> >>> Did I get that right?**** >>> >>> ** ** >>> >>> A couple of questions:**** >>> >>> - the WirelessHART "alarms" correspond to a 6TiSCH "events". Yet, I >>> suppose that a "source route failed" and "graph route failed" are ou= t of >>> scope of 6TiSCH, but rather part of RPL. I would expect those to the= ICMPv6 >>> messages. Thoughts?**** >>> - About the per-channel report, I assume this is "per frequency", >>> right? Is a channel report generated for each neighbor?**** >>> - When comparing your list to *Xavi*'s >>> https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents:**** >>> >>> >>> - we might want to add a "numNACK" counter to the neighbor >>> information**** >>> - we might want to keep timing statistics for all neighbors, not >>> just time source parents. That is, when I receive a packet from a= neighbor >>> which is not my time source neighbor, I do not change my clock, b= ut I still >>> know the timing error.**** >>> >>> Thomas**** >>> >>> ** ** >>> >>> On Wed, Sep 11, 2013 at 7:18 AM, wrote:**** >>> >>> Dear All,**** >>> >>> In the following, I listed the performance metrics reported to the >>> Network/System Manager in WirelessHART and ISA100.11a.**** >>> >>> Some reports still need be added, for example the path failure alerts i= n >>> ISA100.11a.**** >>> >>> Pouria**** >>> >>> **** >>> >>> *WirelessHART performance metrics***** >>> >>> In WirelessHART[1] network the statistics and events are reported to th= e >>> Network Manager (act like PCE in 6TiSCH) through the following commands= : >>> **** >>> >>> 1. Report =93Device Health=94 **** >>> >>> This report is sent periodically toward the Network Manager. The report >>> summaries the communication statistics of a device.**** >>> >>> Byte**** >>> >>> Format**** >>> >>> Description**** >>> >>> 0-1**** >>> >>> Unsigned-16**** >>> >>> Number of packets generated by this device since last report**** >>> >>> 2-3**** >>> >>> Unsigned-16**** >>> >>> Number of packets terminated by this device since last report**** >>> >>> 4**** >>> >>> Unsigned-8**** >>> >>> Number of Data-Link Layer MAC MIC failures detected**** >>> >>> 5**** >>> >>> Unsigned-8**** >>> >>> Number of Network Layer (Session) MIC failures detected**** >>> >>> 6**** >>> >>> Enum-8**** >>> >>> Power Status**** >>> >>> 7**** >>> >>> Unsigned-8**** >>> >>> Number of CRC Errors detected**** >>> >>> **** >>> >>> 1. Report =93Neighbor Health List=94 **** >>> >>> This report is sent periodically toward the Network Manager. The report >>> includes the statistics of linked neighbors.**** >>> >>> Byte**** >>> >>> Format**** >>> >>> Description**** >>> >>> 0**** >>> >>> Unsigned-8**** >>> >>> Neighbor table index**** >>> >>> 1**** >>> >>> Unsigned-8**** >>> >>> Number of Neighbor entries read**** >>> >>> 2**** >>> >>> Unsigned-8**** >>> >>> Total number of neighbors**** >>> >>> 3-4**** >>> >>> Unsigned-16**** >>> >>> Nickname of neighbor**** >>> >>> 5**** >>> >>> Bit-8**** >>> >>> Neighbor Flags**** >>> >>> 6**** >>> >>> Signed-8**** >>> >>> Mean RSL (Receive Signal Level in dBm) since last report**** >>> >>> 7-8**** >>> >>> Unsigned-16**** >>> >>> Number of Packets transmitted to this neighbor**** >>> >>> 9-10**** >>> >>> Unsigned-16**** >>> >>> Number of Packets received from this neighbor**** >>> >>> 11-12**** >>> >>> Unsigned-16**** >>> >>> Packets received from this neighbor**** >>> >>> 13-=85**** >>> >>> **** >>> >>> Number of entries based on response byte 1**** >>> >>> **** >>> >>> 1. Report =93Neighbor Signal Levels=94**** >>> >>> This report is sent periodically toward the Network Manager. The report >>> includes the statistics of discovered (but not linked) neighbors. These >>> neighbors might be discovered when a device has heard the neighbor >>> communication in the discovery links. A device that wish to join a netw= ork, >>> send a join request to the Network manager, including this report.**** >>> >>> Byte**** >>> >>> Format**** >>> >>> Description**** >>> >>> 0**** >>> >>> Unsigned-8**** >>> >>> Neighbor table index**** >>> >>> 1**** >>> >>> Unsigned-8**** >>> >>> Number of Neighbor entries read**** >>> >>> 2**** >>> >>> Unsigned-8**** >>> >>> Total number of neighbors**** >>> >>> 3-4**** >>> >>> Unsigned-16**** >>> >>> Nickname of neighbor**** >>> >>> 5**** >>> >>> Signed-8**** >>> >>> RSL of neighbor in dB**** >>> >>> 6-8**** >>> >>> **** >>> >>> Repeats (as needed) based on response byte 1**** >>> >>> **** >>> >>> 1. Alarm =93Path Down=94 **** >>> >>> The alarm is sent upon detecting a path failure. **** >>> >>> Byte**** >>> >>> Format**** >>> >>> Description**** >>> >>> 0-1**** >>> >>> Unsigned-16**** >>> >>> Nickname of neighbor to which path failure was detected**** >>> >>> **** >>> >>> 1. Alarm "Source Route Failed"**** >>> >>> This alarm is sent upon detecting a source route failure.**** >>> >>> Byte**** >>> >>> Format**** >>> >>> Description**** >>> >>> 0-1**** >>> >>> Unsigned-16**** >>> >>> Nickname of unreachable neighbor in the source route**** >>> >>> 2-5**** >>> >>> Unsigned-32**** >>> >>> Network-Layer MIC (i.e., the MIC generated using the session key) from >>> the NPDU that failed routing**** >>> >>> **** >>> >>> 1. Alarm "Graph Route Failed"**** >>> >>> This alarm is sent upon detecting a graph route failure.**** >>> >>> Byte**** >>> >>> Format**** >>> >>> Description**** >>> >>> 0-1**** >>> >>> Unsigned-16**** >>> >>> Graph Id of the failed route**** >>> >>> **** >>> >>> >>> **** >>> >>> **** >>> >>> *ISA100.11a performance metric***** >>> >>> In ISA100.11a[2], the L2 performance metrics are reported to the System >>> Manager (act like PCE in 6TiSCH) and can be classified into (1) >>> DL_Connectivity alert and (2) NeighborDiscovery alert.**** >>> >>> 1. DL_Connectivity alert**** >>> >>> The DL_connectivity alert can be classified into (a) Per-neighbor >>> reports and (b) Per-channel reports. **** >>> >>> - *Per-neighbor report***** >>> >>> Per-neighbor reports are the performance metrics about the neighbors >>> connection and are reported to the System Manager. These statistics are >>> accumulated in the =93dlmo.NeighborDiag=94 attribute, for each neighbor= . This >>> report is similar to =93Neighbor Health List=94 report in WirelessHART.= **** >>> >>> Each node in ISA100.11a might be asked to report the following >>> statistics about its neighbor:**** >>> >>> **** >>> >>> Octets**** >>> >>> Format**** >>> >>> Description**** >>> >>> 1**** >>> >>> Signed-8**** >>> >>> RSSI (level)**** >>> >>> 1**** >>> >>> Unsigned-8**** >>> >>> RSQI (level)**** >>> >>> 1-2**** >>> >>> ExtDLUint**** >>> >>> RxDPDU(count): Number of valid Packets received from this neighbor **** >>> >>> 1-2**** >>> >>> ExtDLUint**** >>> >>> TxSuccessful (count):Count of successful unicast transmissions to the >>> neighbor **** >>> >>> 1-2**** >>> >>> ExtDLUint**** >>> >>> TxFailed (count): Number of unicast transmission, without getting any >>> ACK or NACK**** >>> >>> 1-2**** >>> >>> ExtDLUint**** >>> >>> TxCCA_Backoff (count): Number of unicast transmission aborted due to CC= A >>> **** >>> >>> 1-2**** >>> >>> ExtDLUint**** >>> >>> TxNACK (count): Number of NACKs received**** >>> >>> 2**** >>> >>> Signed-16**** >>> >>> ClockSigma (level): A rough estimate of standard deviation of clock >>> corrections**** >>> >>> **** >>> >>> - *Per-channel report***** >>> >>> In addition, in ISA100.11a, several performance metrics are reported >>> based on channel for all neighbors to the System Manager. These statist= ics >>> are accumulated in the =93dlmo.ChannelDiag=94 attribute. This report is= similar >>> to =93Device Health=94 report in WirelessHART.**** >>> >>> Byte**** >>> >>> Format**** >>> >>> Description**** >>> >>> 0-2**** >>> >>> Unsigned-16**** >>> >>> Count (Number of attempted unicast transmissions for all channels)**** >>> >>> 3**** >>> >>> Integer-8**** >>> >>> (Percentage of time transmissions on channel 0 did not receive an ACK)*= * >>> ** >>> >>> 4**** >>> >>> Integer-8**** >>> >>> (Percentage of time transmissions on channel 0 aborted due to CCA)**** >>> >>> =85**** >>> >>> **** >>> >>> **** >>> >>> 33**** >>> >>> Integer-8**** >>> >>> (Percentage of time transmissions on channel 15 did not receive an ACK)= * >>> *** >>> >>> 34**** >>> >>> Integer-8**** >>> >>> (Percentage of time transmissions on channel 15 aborted due to CCA)**** >>> >>> **** >>> >>> 1. NeighborDiscovery alert**** >>> >>> In ISA100.11a, each node sends a report, including a list of candidate >>> (overheard) neighbors, to the System Manager to make a potential new >>> routing decisions. The =93dlmo.Candidates=94 attributed is used to stor= e those >>> information in each node in the L2. This report is similar to the =93Ne= ighbor >>> Signal Levels=94 report in WirelessHART.**** >>> >>> Octets**** >>> >>> Format**** >>> >>> Description**** >>> >>> 1**** >>> >>> Unsigned-8**** >>> >>> N (count of discovered neighbors)**** >>> >>> 0-2**** >>> >>> ExtDlUint**** >>> >>> address**** >>> >>> 0-1**** >>> >>> Signed-8**** >>> >>> **** >>> >>> 0-1**** >>> >>> Unsigned-8**** >>> >>> **** >>> >>> =85**** >>> >>> **** >>> >>> **** >>> >>> 0-2**** >>> >>> ExtDlUint**** >>> >>> address**** >>> >>> 0-1**** >>> >>> Signed-8**** >>> >>> **** >>> >>> 0-1**** >>> >>> Unsigned-8**** >>> >>> **** >>> >>> **** >>> >>> * ***** >>> >>> *References***** >>> >>> 1. IEC 62591: Industrial Communication Networks - Wireless >>> Communication Network and Communication Profiles - WirelessHART.**** >>> >>> **** >>> >>> 2. IEC 62734: Industrial communication networks - Fieldbus >>> specifications - Wireless systems for industrial automation: process >>> control and related applications - ISA100.11a.**** >>> >>> **** >>> >>> **** >>> >>> **** >>> >>> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >>> Behalf Of *Thomas Watteyne >>> *Sent:* Saturday, September 07, 2013 7:43 PM >>> *To:* Xavi Vilajosana >>> *Cc:* Pascal Thubert (pthubert); 6tsch@ietf.org >>> *Subject:* Re: [6tsch] report flow contents**** >>> >>> **** >>> >>> Xavi,**** >>> >>> Great, thanks!**** >>> >>> Thomas**** >>> >>> **** >>> >>> On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen < >>> xvilajosana@eecs.berkeley.edu> wrote:**** >>> >>> Hi, >>> I created the scratchpad section in the wiki to keep ideas >>> https://bitbucket.org/6tsch/meetings/wiki/Home >>> >>> >>> and added the flow content information here. >>> >>> https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents**** >>> >>> have a nice weekend!**** >>> >>> X**** >>> >>> **** >>> >>> On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen < >>> xvilajosana@eecs.berkeley.edu> wrote:**** >>> >>> Hi Pascal, it is a good idea!**** >>> >>> I will collect that information and as Thomas put it at the wiki so we >>> do not lose it. >>> >>> :-)**** >>> >>> X**** >>> >>> **** >>> >>> On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) < >>> pthubert@cisco.com> wrote:**** >>> >>> Hello Xavi:**** >>> >>> **** >>> >>> At the call I mentioned we could use info on tracks and cells as well, >>> probably on demand from the PCE.**** >>> >>> For instance, the PCE could observe energy levels over some cells for = a >>> while to make sure they are clean.**** >>> >>> **** >>> >>> What do you think?**** >>> >>> Pascal**** >>> >>> **** >>> >>> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >>> Behalf Of *Xavier Vilajosana Guillen >>> *Sent:* vendredi 6 septembre 2013 01:17 >>> *To:* Thomas Watteyne >>> *Cc:* 6tsch@ietf.org >>> *Subject:* Re: [6tsch] report flow contents**** >>> >>> **** >>> >>> agreed!**** >>> >>> So the fields become:**** >>> >>> **** >>> >>> **** >>> >>> For each known neighbor:**** >>> >>> -ID**** >>> >>> -AVG RSSI in a running window**** >>> >>> -Latest RSSI**** >>> >>> -AVG LQI in a running window [optional]**** >>> >>> -Latest LQI [optional]**** >>> >>> -Num TX packets (option in case there is communication with that >>> neighbor)**** >>> >>> -Num ACK packets (option in case there is communication with that >>> neighbor)**** >>> >>> -Num RX packets (option in case there is communication with that >>> neighbor)**** >>> >>> -Last ASN when it heart about that neighbor **** >>> >>> -Bundle: Num links in the Schedule to that neighbor**** >>> >>> -PDR per link [Optional -- or maybe best and worst PDR only]**** >>> >>> **** >>> >>> -Option Flag (weather there are optional TLV fields on that category)*= * >>> ** >>> >>> +(TLV objects)* **** >>> >>> **** >>> >>> -For each Queue:**** >>> >>> - Avg Queue length in a running window**** >>> >>> - Max Queue length in a running window (peak)**** >>> >>> - Current Queue length (?)**** >>> >>> - ASN of the oldest packet in the QUEUE?**** >>> >>> -Option Flag (weather there are optional TLV fields on that categor= y) >>> **** >>> >>> +(TLV objects)* **** >>> >>> **** >>> >>> -Time source parent**** >>> >>> -ID**** >>> >>> -Avg clock drift (correction done) in a running window**** >>> >>> -Latest clock correction**** >>> >>> -Parent changes (counter of how many times I changed my time source >>> parent)**** >>> >>> -Option Flag (weather there are optional TLV fields on that categor= y) >>> **** >>> >>> +(TLV objects)* **** >>> >>> **** >>> >>> -Option Flag (weather there are optional TLV fields in other categories= ) >>> **** >>> >>> +(TLV objects)* **** >>> >>> **** >>> >>> as regards to this:**** >>> >>> **** >>> >>> "Finally, do you envision a generic mechanism whereby the PCE can turn >>> fields on/off, or triggered independently?"**** >>> >>> **** >>> >>> I see it as CoAP Options, where a set of bytes can be used as "clever >>> bitmap" to tell what options are there, the parsing will decode option = by >>> option and will read the fields. In that way any combination of fields = is >>> supported.**** >>> >>> **** >>> >>> would that work?**** >>> >>> X**** >>> >>> **** >>> >>> On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne < >>> watteyne@eecs.berkeley.edu> wrote:**** >>> >>> Xavi,**** >>> >>> **** >>> >>> Fantastic!**** >>> >>> **** >>> >>> I believe PDR for each link might be too long to fit in a packet. While >>> the mote will most likely keep that information, we could move that to = the >>> query flow, i.e. it is available to the PCE on-demand.**** >>> >>> **** >>> >>> Would you agree that the number of links in a bundle belongs to the >>> neighbor? Of maybe we want a "bundle" category?**** >>> >>> **** >>> >>> In queuing, it might be interesting to see the age of the different >>> packets, to be able to monitor latency.**** >>> >>> **** >>> >>> About LQI, there is no general consensus among vendors on what the >>> definition is, or how exactly it is calculated. I would make it optiona= l. >>> **** >>> >>> **** >>> >>> Also, it might be good to be able to add arbitrary fields to each >>> category: neighbor, queue, time source neighbor.**** >>> >>> **** >>> >>> Finally, do you envision a generic mechanism whereby the PCE can turn >>> fields on/off, or triggered independently?**** >>> >>> **** >>> >>> Thomas**** >>> >>> **** >>> >>> On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < >>> xvilajosana@eecs.berkeley.edu> wrote:**** >>> >>> Hi Thomas, Diego,**** >>> >>> **** >>> >>> I agree that LQI should be there as well. I update here the list with >>> Thomas suggestions. **** >>> >>> **** >>> >>> For each known neighbor:**** >>> >>> -ID**** >>> >>> -AVG RSSI in a running window**** >>> >>> -Latest RSSI**** >>> >>> -AVG LQI in a running window**** >>> >>> -Latest LQI**** >>> >>> -Num TX packets (option in case there is communication with that >>> neighbor)**** >>> >>> -Num ACK packets (option in case there is communication with that >>> neighbor)**** >>> >>> -Num RX packets (option in case there is communication with that >>> neighbor)**** >>> >>> -Last ASN when it heart about that neighbor **** >>> >>> **** >>> >>> Other fields**** >>> >>> -Num links in the Schedule to that neighbor**** >>> >>> -For each link PDR**** >>> >>> -For each Queue:**** >>> >>> - Avg Queue length in a running window**** >>> >>> - Max Queue length in a running window (peak)**** >>> >>> - Current Queue length (?)**** >>> >>> -Time source parent**** >>> >>> -ID**** >>> >>> -Avg clock drift (correction done) in a running window**** >>> >>> -Latest clock correction**** >>> >>> -Parent changes (counter of how many times I changed my time source >>> parent)**** >>> >>> **** >>> >>> -Option Flag (weather there are optional TLV fields)**** >>> >>> +(TLV objects)* **** >>> >>> **** >>> >>> **** >>> >>> Hope this makes sense.**** >>> >>> cheers! >>> Xavi**** >>> >>> **** >>> >>> On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < >>> watteyne@eecs.berkeley.edu> wrote:**** >>> >>> *[renamed thread]***** >>> >>> **** >>> >>> Xavi,**** >>> >>> **** >>> >>> A few thoughts:**** >>> >>> - the counters (numTx, etc) will only be present for neighbors the node >>> has communicate with, so they should be optional in the packet.**** >>> >>> - you have focused on the topological information (which I think is the >>> right one). It might be useful to gather other data related to >>> synchronization or queuing.**** >>> >>> - I couldn't agree more with your suggestion to make it extensible. Thi= s >>> does mean that we will need to state somewhere that a device need to ig= nore >>> silently fields it does not understand.**** >>> >>> **** >>> >>> Thomas**** >>> >>> **** >>> >>> On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < >>> xvilajosana@eecs.berkeley.edu> wrote:**** >>> >>> Hello, I guess that flows are getting defined and I started to think on >>> the contents of the messages on that flows. Not sure if this is the rig= ht >>> time or I am going way far..**** >>> >>> **** >>> >>> According to the previous discussion I assume that the five flows are:*= * >>> ** >>> >>> **** >>> >>> ME-6TOP - Query Flow**** >>> >>> ME-6TOP - Action Flow**** >>> >>> **** >>> >>> 6TOP - ME - Report Flow**** >>> >>> 6TOP - ME - Event Flow**** >>> >>> 6TOP - ME - Request BW Flow**** >>> >>> **** >>> >>> I'd like to start defining the content of the messages in the Report >>> Flow:**** >>> >>> **** >>> >>> The Report Flow: has to deal with the information that a node knows and >>> has to be sent to the ME so the ME can compute the schedule among other= s. >>> Here I list the information that we can know in a mote and can be used= at >>> the ME to compute the schedule (complete please if I miss something)***= * >>> >>> **** >>> >>> For each known neighbor:**** >>> >>> -ID**** >>> >>> -AVG RSSI in a running window**** >>> >>> -Latest RSSI**** >>> >>> -Num TX packets**** >>> >>> -Num ACK packets**** >>> >>> -Num RX packets**** >>> >>> -Last ASN when it heart about that neighbor **** >>> >>> **** >>> >>> Other fields**** >>> >>> -Num links in the Schedule to that neighbor**** >>> >>> -For each link PDR**** >>> >>> **** >>> >>> **** >>> >>> Then we need to have some TLV like objects that can be used for >>> ad-hoc/naive/other extensions of the reporting process. In that way we >>> don't constraint the implementation of the scheduling alg. to that >>> information.**** >>> >>> **** >>> >>> what do you think?**** >>> >>> X**** >>> >>> **** >>> >>> On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang wrote= : >>> **** >>> >>> Hi all,**** >>> >>> **** >>> >>> In this thread, we will continue the discussion about Confirmation >>> message. Here is some background information.**** >>> >>> **** >>> >>> Context: e.g.**** >>> >>> - node sends a report and want to know if the report is accepted., = * >>> *** >>> >>> - ME sends a action request and want to know if/when the action >>> taken.**** >>> >>> Options:**** >>> >>> (1) Nothing**** >>> >>> (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** >>> >>> (3) App-level ACK type**** >>> >>> (4) Use different flow (i.e. action flow)**** >>> >>> **** >>> >>> IMHO, different control flow may have different requirement for >>> confirmation message.**** >>> >>> (1) Action Flow, needs a App-level confirmation, like Succ/Fail**** >>> >>> (2) Query Flow, automatically has the confirmation, i.e. the messag= e >>> packet corresponding to a specific query.**** >>> >>> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer >>> option (1) and (3), i.e. the confirmation message is an option, but if = a >>> confirmation message is needed, it should be App-level Ack, instead of >>> transport layer confirmation, which will give 6top more flexibility.***= * >>> >>> **** >>> >>> What do you think?**** >>> >>> **** >>> >>> Thanks**** >>> >>> Qin**** >>> >>> **** >>> >>> **** >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch**** >>> >>> **** >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch**** >>> >>> **** >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch**** >>> >>> **** >>> >>> **** >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch**** >>> >>> **** >>> >>> **** >>> >>> **** >>> >>> **** >>> >>> ** ** >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch**** >>> >>> ** ** >>> >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --=20 DIEGO DUJOVNE Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl (56 2) 676 8125 --e89a8f6466f7a9a53f04e64497b2 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hello Qin,
=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0 I think that a per-frequency report will help t= he PCE
to decide which frequency to use, and maybe temporarily
= black-list them. For example, a dynamic scheme may include
sampling the blacklisted frequencies every X minutes to re-enable
= them once the interference has disappeared.
=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0 This will require the node to refresh the RSSI
and LQI values in a opportunistic way (every time the a cell
uses that frequency) to save energy.
=A0 =A0 =A0 = =A0 =A0 =A0=A0
Any thoughts?

=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Diego=

=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0=A0=A0
=A0
=


2013/9/= 13 Qin Wang <qinwang@berkeley.edu>
Hi Thomas and All,

=
I think the per-frequency report (or called per-channel report i= n ISA100.11a) is important, because PCE can use it to build black frequency= list and update channel hopping sequence. But, I'm not sure if it make= s implementation too complex or not.

Thought?

Qin


On Fri, Sep 13, 201= 3 at 8:48 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu>= wrote:
Pouria,
Thanks again fo= r the overview, which complements your first document nicely.
Alfredo,
Could you please elaborate what you mean by in-netw= ork processing? Are you referring to a distributed way for the nodes to &qu= ot;consume" this data, some fusion as the data trickles up the DAG, or= something else?

Thomas


On Thu, Sep 12, 2013 at 12:34 AM, Alfredo Grieco <= span dir=3D"ltr"><alfredo.grieco@gmail.com> wrote:

Hi All,

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Do you t= hink is it feasible to add a bit/flag that allows some form of in-network p= rocessing ?

=A0

<= font color=3D"#1f497d" face=3D"Calibri">This wou= ld be very useful to distributed/decentralized scheduling techniques and sh= ould not cost that much.

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Any thou= ghts is welcome.

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Cheers

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Alfredo<= u>

=A0

Da: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] Per conto di P.Zand@utwente.nl
Inviato: Wednesday, Septembe= r 11, 2013 10:45 PM
A: xvilajosan= a@eecs.berkeley.edu; watteyne@eecs.berkeley.edu
Cc: 6tsch@ietf.org
Oggetto: Re: [6tsch] report flow contents

=A0

Thomas,

I agree with you that &quo= t;source route failed" and "graph route failed" are out of s= cope of 6TiSCH.

Regarding to you question = about the per-channel report, I think they are based on each radio channel = supported by the specification (channel 11-26 in 2.4GHz in IEEE 802.15.4), = not channel offset. And a channel report generated for all neighbor.=

Regardi= ng to your first question, let me now explain more. I think both of these s= tandard provide a mechanisms to make it possible for System/Network Manager= to also read (pull) desired attributes (But not all the feature in 6TiSCH)= . For example in WirelessHART [1], by =93Report Neighbor Health List=94 req= uest, the network manager might mention the number of neighbors to be read = in =93Number of Neighbor entries read=94 field..

I think= , ISA100.11a provides more mechanisms for System manager to get the desired= attributes from the field devices. And the first two features that you men= tioned might also be supported by ISA100.11a.

In ISA1= 00.11a, three mechanisms are provided for reporting diagnostic information = contained in dlmo.NeighborDiag (described in section 1 later) and dlmo.Chan= nelDiag (described in Section 2 later):

  1. The health reports concentrator object (HRCO), ca= n be configured to report any attribute in the DL on a periodic bas= is. dlmo.NeighborDiag entries (shown in Table 2) and dlmo.Channe= lDiag (shown in Table 5) can be reported through that mechanism. Through th= e HRCO, the system manager can configure the device to report NeighborDiag = periodically, such as every 30 minutes. Following each such report, on a pe= r-entry basis, NeighborDiag counts shall be reset to zero. Levels shall use= the current value as a starting point for the next period [2].
  2. Diagnostic information can= be retrieved at any time by the system manager, by reading the applicable = attributes. The system manager can read (poll) NeighborDiag as a read-only = attribute on a per-entry basis. As in an HRCO report, counts shall be reset to zero when read [2].
  3. Diagnostic information can= be reported by the DL on an exception = basis, through the DL_Connectivity alert (Described in section 3= (a)). The DL can additionally be configured, through the dlmo.AlertPolicy a= ttribute (shown in Table 6), to report NeighborDiag information when diagno= stic values exceed a threshold. Only the row triggering the alert is report= ed. No values are reset [2].

=A0

In ISA1= 00.11a, the system manager establishes a DL communication relationship betw= een a device and its neighbor by adding an entry to the device=92s dlmo.Nei= ghbor attribute (see Table 1). Each such entry specifies a level of diagnos= tics to be collected, through the field dlmo.Neighbor[].DiagLevel. For each= neighbor, diagnostics may be collected at a baseline level, or a detailed = level including clock diagnostics [2]. This levels are described in Section= 1.

Table 1. dlmo.Neighbor fields [2]<= /font>

Field name=

Field encodin= g

* Index (16-bit address of neighbor)

ExtDlUint (used as an index)<= /u>

= EUI64 (EUI-64 identifier of the neighbor)=

Type: Unsigned64

= =85

= =85

DiagLevel (selection of neighbor diagnostics to collect)=

Type: Unsigned2<= /p>

Bit0 =3D 1 Colle= ct link diagnostics

Bit1 =3D 1 Collect clock diagnostics=

= =85

= =85

<= /div>

=A0

When the dlmo.Neighbor= [].DiagLevel field is set for a particular neighbor, the DL shall create co= rresponding entries in the read-only attribute dlmo.NeighborDiag. NeighborD= iag values are accumulated from the time that the dlmo.NeighborDiag entry i= s created [2].

1.=A0=A0=A0= =A0=A0 dlmo.NeighborDiag:

dlmo.NeighborDiag is an in= dexed OctetString collection that contains diagnostics for a set of neighbo= rs. The attribute is read-only, with rows created as needed by the DL [2].<= u>

Neighbo= rDiag entries are instantiated by the system manager, by setting dlmo.Neigh= bor[].DiagLevel bits to non-zero values. Iff (if and only if) Bit0=3D1, the= n summary diagnostics shall be collected for the neighbor, consolidated acr= oss all channels. Iff Bit1=3D1, then detailed clock diagnostics shall be co= llected for the neighbor, consolidated across all radio channels [2].

Table 2. dlmo.NeighborDiag fields [2]

= * Index

= Field name

= Field encoding

= Type: ExtDlUint (neighbor address, used as an index)=

<= span style=3D"font-size:11.0pt;font-family:"Calibri","sans-s= erif";font-weight:bold">Summary

Type: OctetString (see Table 3)<= u>

ClockDetail

Type: OctetString (see Table 4)<= u>

=A0

Table <= /span>3. Diagnostic Summary OctetString fields [2]

= RSSI (level)

= RSQI (level)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= RxDPDU (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= TxSuccessful (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= TxFailed (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= TxCCA_Backoff (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= TxNACK (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= ClockSigma (level)

= Field name

= Field encoding

= Type: Integer8

= Type: Unsigned8

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

= Type: Integer16

<= u>=A0

Table 4. Diagnostic ClockDetail OctetString fields [2]<= u>

= ClockBias (level, signed)

= <= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= ClockCount (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= ClockTimeout (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= ClockOutliers (count)

= Field name

= Field encoding

= Type: Integer16

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

<= u>=A0

2.=A0=A0=A0=A0=A0 = dlmo.ChannelDiag:

dlmo.ChannelDiag is a read-only dynamic attribute that reports DPDU= transmit failure rates on each radio channel supported by the specificatio= n. This enables the system manager to be aware of consistent connectivity p= roblems on a per-channel basis, as a diagnostic for spectrum management in = a subnet [2].

Two diagnostics are reported for each channel, = each indicating a different type of failure. indicates the percentage o= f time that unicast DPDU transmissions on channel N did not receive an ACK = or a NACK. <= span style=3D"font-size:12.0pt;font-family:"Times New Roman",&quo= t;serif""> indicates the percentage of time that unicast DPDU transmiss= ions on channel N were aborted due to CCA. [2]<= /p>

Table 5. dlmo.ChannelDiag fields

= Count (Number of attempted unicast transmissions for all chann= els)

= Field name

= Field encoding

Type:Unsigned16

(Percentage of time transmissions on channel 0 d= id not receive an ACK)

Type: Integer8

(Percentage of time transmissions on channel 0 a= borted due to CCA)

Type: Integer8

= =85

= =A0

(Percentage of time transmissions on channel 15 = did not receive an ACK)

Type: Integer8

(Percentage of time transmissions on channel 15 = aborted due to CCA)

Type: Integer8

=A0

3.=A0=A0=A0=A0=A0 Data link layer alerts<= /p>

  1. <= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif";font-weight:bold">DL_Connectivity alert<= u>

DL performance diagnostics are accumulated in the attributes dl= mo.NeighborDiag for per-neighbor diagnostics, and dlmo.ChannelDiag for per-channel diagnostics. Normally the system manager confi= gures the HRCO to report these diagnostics periodically, and the DL automat= ically resets the diagnostic counters whenever these attributes are so repo= rted. Between such reports, diagnostics may indicate a problem that needs t= o be reported to the system manager immediately. The DL_Connectivity alert = provides the mechanism for the DL to report such issues, and the dlmo.Alert= Policy attribute enables the system manager to set thresholds for such repo= rting [2].

The attribute dlmo.AlertPolicy enables/disables the DL_Connectivity = alert and provides thresholds to control whether alerts are reported. dlmo.= AlertPolicy is an OctetString containing fields as shown in Table 6 [2].=

Table 6. dlmo.AlertPolicy fields

= Field name

= Field scalar type

= Descriptor (Enables or disabled the DL_Connectivity alert.)=

Type Alert report descriptor<= /u>

NeiMinUnicast (M= inimum number of unicast transactions needed for a neighbor report.)=

Type: ExtDlUint

NeiErrThresh (Re= port neighbor diagnostic if the percentage error rate reaches this threshol= d )

Type: Unsigned8

ChanMinUnicast (= Minimum number of unicast transactions on a channel needed as a pre-conditi= on for triggering an alert.)

Type: ExtDlUint

= NoAckThresh (Report ChannelDiag if a NoAck value is greater th= an this threshold)

Type: Unsigned8

CCABackoffThresh= (Report ChannelDiag if a CCABackoff value is greater than this threshold)<= u>

Type: Unsigned8

=A0

  1. NeighborDiscovery alert

The NeighborDiscovery alert provides a mechanism for the DL to= report the contents of the OctetString in dlmo.Candidates attribute (see T= able 7).

The neighbors in the dlmo.Neighbor attribute are= set by the system manager, not by the device itself. The DL autonomously b= uilds a list of candidate neighbors in the dlmo.Candidates attribute. This = list is then forwarded to the system manager. The system manager considers = the radio connectivity that is reported in dlmo.Candidates, but may also co= nsider other criteria such as resource constraints, historical performance,= or subnet topology [2].

Table 7. dlmo.Candidates OctetString fields

Field name

Field encoding

N (count of disc= overed neighbors)

Type: Unsigned8<= u>

Neighbor1 (16-bi= t address of first candidate)

Type: ExtDlUint<= u>

RSSI1 (radio sig= nal quality of first candidate)

Type: Integer8

RSQI1 (radio sig= nal quality of first candidate)

Type: Unsigned8<= u>

etc=85=

=A0

NeighborN (16-bi= t address of Nth candidate)

Type: ExtDlUint<= u>

RSSIN (radio sig= nal quality of Nth candidate)

Type: Integer8

RSQIN (radio sig= nal quality of Nth candidate)

Type: Unsigned8<= u>

=A0

Re= ferences

1.=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0 IEC 62591: Industrial Communication Networks - Wireless Com= munication Network and Communication Profiles - WirelessHART.=

=A0

2.=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0 IEC 62734: Industrial communication networks - Fieldbus specifica= tions - Wireless systems for industrial automation: process control and rel= ated applications - ISA100.11a.

=A0

<= font color=3D"#1f497d" face=3D"Calibri">= =A0

6tsch-bounces@ietf.org [ma= ilto:6tsch-boun= ces@ietf.org] On Behalf Of <= /b>Xavier Vilajosana Guillen
Sent: Wednesday, September 1= 1, 2013 8:54 PM
To: Thoma= s Watteyne
Cc: 6TSCH
<= b>Subject: Re: [6tsch] report f= low contents

=A0

Hi Thomas,

my 5 cents.

I agree on adding = NACK information and timing differences with other than time source parent = neighbors. I will add to the wiki :-)

As regards to t= he differences of what we do at 6TiSCH and WHart or ISA100.11a, our proposa= l is more flexible and has less cohesion with a cost of increased complexit= y (e.g configurable data and reporting period). We have to analyse carefull= y what are the implications in terms of protocol complexity and implementat= ion of that mechanism versus how often they would be used. Could we maybe d= efine some "templates" or default configurations so using the 6Ti= SCH can be done without configuration overhead? Then configuration can be u= sed for those that are really interested on tuning their system. =

just thoughts..
X

=A0=

=A0

On W= ed, Sep 11, 2013 at 9:58 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu> wr= ote:

Pouria,

=A0

Wonderful list.

=A0

Your document clearly highlights that (1)= the "report" flows both in WirelessHART and ISA100.11a are stric= tly periodic and (1) they have a fixed format. From what we have discussed = so far, the solutions we are developing is different in the following ways:=

  • 6TiSCH offers a m= echanism allowing the PCE to configure what data it want to receive, and co= nfigure the trigger for a node to generate from data.<= /font>
  • 6TiSCH offers=A0a mechanism allowing the PCE to que= ry the data, on top of having the nodes push the information<= /span>
  • In 6TiSCH, the format of the payload is not fixed. = In particular, it is possible to add application-specific fields, allowing = for extensions.
  • In 6TiSCH,=A0the transport (CoAP?) and formatting (= CBOR?) are IETF-friendly and integrate well in the IPv6 stack and associate= d mechanisms

= Did I get that right?=

=A0<= /span>

A couple of questions:

  • the = WirelessHART "alarms" correspond to a 6TiSCH "events". = Yet, I suppose that a "source route failed" and "graph route= failed" are out of scope of 6TiSCH, but rather part of RPL. I would e= xpect those to the ICMPv6 messages. Thoughts?
  • About the per-channel report, I assume this is &quo= t;per frequency", right? Is a channel report generated for each neighb= or?
  • When comparing your list to Xavi's=A0https://bitbucket.or= g/6tsch/meetings/wiki/report_flow_contents:=
    • we might= want to add a "numNACK" counter to the neighbor information
    • we might want to keep timing statistics for all nei= ghbors, not just time source parents. That is, when I receive a packet from= a neighbor which is not my time source neighbor, I do not change my clock,= but I still know the timing error.

Thomas

=A0

On Wed, Sep 11, 2013 at 7:18 AM, <P.Zand@utwente.nl> wrot= e:

Dear All,

In the following, I listed the p= erformance metrics reported to the Network/System Manager in WirelessHART a= nd ISA100.11a.

Some= reports still need be added, for example the path failure alerts in ISA100= .11a.

Pour= ia

=A0

WirelessHART performance metrics=

<= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif"">In WirelessHART[1] network the statistics and = events are reported to the Network Manager (act like PCE in 6TiSCH) through= the following commands:

  1. This re= port is sent periodically toward the Network Manager. The report summaries = the communication statistics of a device.

    Byte

    =

    Format

    Description<= /u>

    0-1

    <= /td>

    Unsigned-16<= /u>

    Number of packets generated by this = device since last report

    2-3

    <= /td>

    Unsigned-16<= /u>

    Number of packets terminated by this= device since last report

    4

    Unsigned-8

    Number of Data-Link Layer MAC MIC fa= ilures detected

    5

    Unsigned-8

    Number of Network Layer (Session) MI= C failures detected

    6

    Enum-8

    Power Status=

    7

    Unsigned-8

    Number of CRC Errors detected=

    =A0

    1. Report =93Neighbor Hea= lth List=94

    This report is sent pe= riodically toward the Network Manager. The report includes the statistics o= f linked neighbors.

    Byte

    =

    Format

    Description<= /u>

    0

    Unsigned-8

    Neighbor table index

    1

    Unsigned-8

    Number of Neighbor entries read

    2

    Unsigned-8

    Total number of neighbors

    3-4

    <= /td>

    Unsigned-16<= /u>

    Nickname of neighbor

    5

    Bit-8

    Neighbor Flags<= u>

    6

    Signed-8=

    Mean RSL (Receive Signal Level in dB= m) since last report

    7-8

    <= /td>

    Unsigned-16<= /u>

    Number of Packets transmitted to thi= s neighbor

    9-10

    =

    Unsigned-16<= /u>

    Number of Packets received from this= neighbor

    11-12

    Unsigned-16<= /u>

    Packets received from this neighbor<= /span>

    13-=85

    =A0

    <= /td>

    Number of entries based on response = byte 1

    =A0

    1. Report =93Neighbor Sig= nal Levels=94

    This report is sent pe= riodically toward the Network Manager. The report includes the statistics o= f discovered (but not linked) neighbors. These neighbors might be discovere= d when a device has heard the neighbor communication in the discovery links= . A device that wish to join a network, send a join request to the Network = manager, including this report.

    Byte

    =

    Format

    Description<= /u>

    0

    Unsigned-8

    Neighbor table index

    1

    Unsigned-8

    Number of Neighbor entries read

    2

    Unsigned-8

    Total number of neighbors

    3-4

    <= /td>

    Unsigned-16<= /u>

    Nickname of neighbor

    5

    Signed-8=

    RSL of neighbor in dB<= u>

    6-8

    <= /td>

    =A0

    <= /td>

    Repeats (as needed) based on respons= e byte 1

    =A0

    1. Alarm =93Path Down=94 =

    The alarm is sent upon= detecting a path failure.

    Byte

    Format

    Descriptio= n

    0-1

    Unsigned-16

    Nickname of neighbor to which path failure was detected

    =A0

    1. This al= arm is sent upon detecting a source route failure.<= /u>

      Byte

      =

      Format

      Description<= /u>

      0-1

      <= /td>

      Unsigned-16<= /u>

      Nickname of unreachable neighbor in = the source route

      2-5

      <= /td>

      Unsigned-32<= /u>

      Network-Layer MIC (i.e., the MIC gen= erated using the session key) from the NPDU that failed routing

      =A0

      1. This al= arm is sent upon detecting a graph route failure.

        Byte

        =

        Format

        Description<= /u>

        0-1

        <= /td>

        Unsigned-16<= /u>

        Graph Id of the failed route<= /font>

        =A0

        =A0

        ISA100.11a performance metric

        <= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif"">In ISA100.11a[2], the L2 performance metrics a= re reported to the System Manager (act like PCE in 6TiSCH) and can be class= ified into (1) DL_Connectivity alert and (2) NeighborDiscovery alert.

        1. The DL= _connectivity alert can be classified into (a) Per-neighbor reports and (b)= Per-channel reports.

            • Per-neighbor report=

          Per-neighbor reports are the=A0 performance metrics abou= t the neighbors connection and are reported to the System Manager. These st= atistics are accumulated in the =93dlmo.NeighborDiag=94 attribute, for each= neighbor. This report is similar to =93Neighbor Health List=94 report in W= irelessHART.

          Each node i= n ISA100.11a might be asked to report the following statistics about its ne= ighbor:

          =A0<= /font>

          Octets

          Format

          Description<= /u>

          1

          Signed-8=

          RSSI (level)=

          1

          Unsigned-8

          RSQI (level)=

          1-2

          <= /td>

          ExtDLUint

          RxDPDU(count): Number of valid Packe= ts received from this neighbor

          1-2<= u>

          ExtDLUint

          TxSuccessful (count):Count of successful unicast transmissions to= the neighbor

          1-2<= /span>

          ExtDLUint

          TxFailed (count): Number of unicast transmission, without=A0 gett= ing any ACK or NACK

          1-2<= /span>

          ExtDLUint

          TxCCA_Backoff (count): Number of unicast transmission aborted due= to CCA

          1-2<= /span>

          ExtDLUint

          TxNACK (count): Number of NACKs received<= /u>

          2

          Signed-16

          ClockSigma (level): A rough estimate of standard deviation of clo= ck corrections

          =A0

            • Per-channel report<= /b>

          In addition, in ISA100.11a, several performance metrics = are reported based on channel for all neighbors to the System Manager. Thes= e statistics are accumulated in the =93dlmo.ChannelDiag=94 attribute. This = report is similar to =93Device Health=94 report in WirelessHART.

          Byte

          =

          Format

          Description<= /u>

          0-2

          <= /td>

          Unsigned-16<= /u>

          Count (Number of attempted unicast t= ransmissions for all channels)

          3=

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 0 did not receive an ACK)

          4

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 0 aborted due to CCA)

          =85<= /span>

          =A0

          =A0

          33

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 15 did not receive an ACK)

          34

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 15 aborted due to CCA)

          =A0

          1. In ISA= 100.11a, each node sends a report, including a list of candidate (overheard= ) neighbors, to the System Manager to make a potential new routing decision= s. The =93dlmo.Candidates=94 attributed is used to store those information = in each node in the L2. This report is similar to the =93Neighbor Signal Le= vels=94 report in WirelessHART.

            Octets

            Format

            Description<= /u>

            1

            Unsigned-8

            N (count of discovered neighbors)

            0-2

            <= /td>

            ExtDlUint

            address

            0-1<= /span>

            Signed-8

            <= /span>

            0-1<= /span>

            Unsigned-8

            <= /span>

            =85<= /span>

            =A0

            =A0

            0-2<= /span>

            ExtDlUint

            <= font face=3D"Calibri">address

            0-1<= /span>

            Signed-8

            <= /span>

            0-1<= /span>

            Unsigned-8

            <= /span>

            =A0=

            =A0

            References

            1.=A0= =A0=A0=A0=A0=A0 IEC 62591: Industrial Communication Networks - Wireless Communicati= on Network and Communication Profiles - WirelessHART.<= u>

            =A0<= /font>

            2.=A0= =A0=A0=A0=A0=A0 IEC 62734: Industrial communication networks - Fieldbus specificati= ons - Wireless systems for industrial automation: process control and relat= ed applications - ISA100.11a.

            =A0<= /span>

            = =A0

            =A0<= /span>

            From: 6tsch-bounces@ietf.= org [mailto:6tsch-bounces@ietf.org] On Behalf = Of Thomas Watteyne
            Sent: Saturday, September 07= , 2013 7:43 PM
            To: Xavi V= ilajosana
            Cc: Pascal Thub= ert (pthubert); 6tsch@i= etf.org
            Subject: Re: [6tsch] report = flow contents

            =A0

            Xavi,

            Great, thanks!=

            Thomas

            =A0

            On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen <xvilajosana@e= ecs.berkeley.edu> wrote:

            Hi,
            I created the scra= tchpad section in the wiki to keep ideas
            https://bitbucket.org/6tsch/m= eetings/wiki/Home


            and added the flow content information here.

            https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents

            have a nice weekend!

            X

            =A0

            On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:=

            Hi Pascal, it is a good id= ea!

            I will collect that information= and as Thomas put it at the wiki so we do not lose it.

            :-)

            X

            = =A0

            On Fri, Sep 6, 2013 at 8:51= AM, Pascal Thubert (pthubert) <pthubert@cisco.com> wrote:

            Hello Xavi= :

            =A0<= /span>

            = At the call I mentioned we could use info on tra= cks and cells as well, probably on demand from the PCE.

            For = instance, the PCE could observe energy levels over some cells for=A0 a whil= e to make sure they are clean.

            =A0<= /span>

            = What do you think?

            Pascal

            =A0

            From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana= Guillen
            Sent: vendredi 6 septembre 2= 013 01:17
            To: Thomas Watt= eyne
            Cc: 6tsch@ietf.org
            Subject: Re: [6tsch] report = flow contents

            =A0=

            agreed!

            So the fields become= :

            =A0

            =A0=

            For each known = neighbor:

            =A0-ID

            =A0-AVG RSSI in a running wind= ow

            =A0-Latest RSSI

            =A0-AVG LQI in a running= window [optional]

            =A0-Latest LQI [optional]<= /p>

            =A0-Num TX packets (option in = case there is communication with that neighbor)=

            =A0-Num ACK packets (option in= case there is communication with that neighbor)

            =A0-Num RX packets (option in = case there is communication with that neighbor)=

            =A0-Last ASN when it hear= t about that neighbor=A0

            =A0-Bundle: Num links in the Schedule to that nei= ghbor

            =A0 =A0 =A0 -PDR per link [Opt= ional -- or maybe best and worst PDR only]

            <= /div>

            =A0

            =A0-Option Flag (weather there are op= tional TLV fields on that category)

            =A0

            =A0-For each Queue:<= /font>

            =A0 =A0 - Avg Queue length in = a running window

            =A0 =A0 - Max Queue length in a running window (peak)

            =A0 =A0 - Current Queue length= (?)

            =A0 =A0 - ASN of the oldest packet in the QUEUE?=

            =A0 =A0 -Option Flag (wea= ther there are optional TLV fields on that category)

            =A0 =A0 =A0 =A0 +(TLV objects)= *=A0

            =A0

            -Time source parent

            = =A0 =A0 -ID

            =A0 =A0 -Avg clock drift (corr= ection done) in a running window

            =

            =A0 =A0 -Latest clock correction

            =A0 =A0 -Parent changes (count= er of how many times I changed my time source parent)<= u>

            =A0 =A0 -Option Flag (wea= ther there are optional TLV fields on that category)

            =A0 =A0 +(TLV objects)*=A0

            = =A0

            -Option Flag (weather th= ere are optional TLV fields in other categories)

            =A0 =A0+(TLV objects)*=A0

            =A0

            as regards to this:

            =A0

            "Finally, do you envision= a generic mechanism whereby the PCE can turn fields on/off, or triggered i= ndependently?"

            =A0

            I see it as CoAP Options, where a set of b= ytes can be used as "clever bitmap" to tell what options are ther= e, the parsing will decode option by option and will read the fields. In th= at way any combination of fields is supported.<= /p>

            =A0

            would that work?

            X=

            =A0

            On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <watteyne@eecs.berkeley.edu= > wrote:

            Xavi,

            =A0

            Fantastic!

            =A0

            I believe PDR for each link might be too long to fit in a pac= ket. While the mote will most likely keep that information, we could move t= hat to the query flow, i.e. it is available to the PCE on-demand.=

            =A0

            Would you = agree that the number of links in a bundle belongs to the neighbor? Of mayb= e we want a "bundle" category?

            =A0

            In queuing= , it might be interesting to see the age of the different packets, to be ab= le to monitor latency.

            =A0

            About LQI,= there is no general consensus among vendors on what the definition is, or = how exactly it is calculated. I would make it optional.

            =A0

            Also, it m= ight be good to be able to add arbitrary fields to each category: neighbor,= queue, time source neighbor.

            =A0

            Finally, d= o you envision a generic mechanism whereby the PCE can turn fields on/off, = or triggered independently?

            <= span style=3D"font-size:12.0pt;color:#888888">=A0

            Thomas=

            =A0<= /u>

            On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajo= sana Guillen <xvilajosana@eecs.berkeley.edu> wrote:<= /font>

            Hi Thomas, Diego,

            =A0=

            I agree that LQI should be there as well. I update here the l= ist with Thomas suggestions.=A0

            <= p>=A0

            For each known neigh= bor:

            =A0-ID

            =A0-AVG RSSI in a running wind= ow

            =A0-Latest RSSI

            =A0-AVG LQI in a running= window

            <= span style=3D"font-size:9.5pt;font-family:"Arial","sans-seri= f"">=A0-Latest LQI

            =A0-Num TX packets (option in = case there is communication with that neighbor)=

            =A0-Num ACK packets (option in= case there is communication with that neighbor)

            =A0-Num RX packets (option in = case there is communication with that neighbor)=

            =A0-Last ASN when it hear= t about that neighbor=A0

            =A0

            Other fields<= /u>

            =A0-Num links in= the Schedule to that neighbor

            =A0 =A0 -For each link PDR

            =A0-For each Queue:

            =A0 =A0 - Avg Queue length in a running window<= /span>

            =A0 =A0 - Max Queue length in a running wind= ow (peak)

            =A0 =A0 - Current Queue length (?)

            -Time source parent

            =A0 =A0 -ID

            =A0 = =A0 -Avg clock drift (correction done) in a running window

            =A0 =A0 -Latest clock correction<= /p>

            =A0 =A0 -Parent changes (counter of how many times I chang= ed my time source parent)

            =A0

            -Option Fl= ag (weather there are optional TLV fields)

            =A0 =A0+(TLV objects)*=A0

            =A0

            =A0

            Hope this = makes sense.

            cheers!
            Xavi

            =A0

            On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <watteyne@eecs.berkeley.ed= u> wrote:

            [renamed = thread]

            =A0

            Xavi,<= /p>

            =A0<= /p>

            A few thoughts:=

            - the count= ers (numTx, etc) will only be present for neighbors the node has communicat= e with, so they should be optional in the packet.

            - you have focused on the top= ological information (which I think is the right one). It might be useful t= o gather other data related to synchronization or queuing.=

            - I couldn't agree more w= ith your suggestion to make it extensible. This does mean that we will need= to state somewhere that a device need to ignore silently fields it does no= t understand.

            =A0

            Thomas=

            =A0

            On Thu, Sep 5, 201= 3 at 11:15 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu> = wrote:

            Hello, I guess that flows are getting defined and I started to thin= k on the contents of the messages on that flows. Not sure if this is the ri= ght time or I am going way far..

            =A0

            According to the pr= evious discussion I assume that the five flows are:

            =A0

            ME-6TOP - = Query Flow

            ME-6TOP - Action Flow

            =A0

            6TOP - ME - Report Flow

            =

            6TOP - ME - Event Flow

            6TOP - ME - Request BW Flow

            =A0

            I'd like to start defining the content of the messages in= the Report Flow:

            =A0=

            The Report Flow: has to deal with the information that a node= knows and has to be sent to the ME so the ME can compute the schedule amon= g others. Here I list =A0the information that we can know in a mote and can= be used at the ME to compute the schedule (complete please if I miss somet= hing)

            =A0

            For each k= nown neighbor:

            =A0-ID

            =A0-AVG R= SSI in a running window

            =A0-Latest RSSI

            = = =A0-Num TX packets

            =A0-Num ACK packets

            =A0-Num RX packets

            =A0-Last ASN when it heart about that neighbor=A0

            =A0

            Other fields

            =A0= -Num links in the Schedule to that neighbor

            =A0 =A0 -For each link PDR

            =A0

            =A0

            Then we ne= ed to have some TLV like objects that can be used for ad-hoc/naive/other ex= tensions of the reporting process. In that way we don't constraint the = implementation of the scheduling alg. to that information.

            =A0

            = = what do you think?

            X

            =A0

            On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu>= ; wrote:

            Hi all,

            =A0

            In this thread, we will continue t= he discussion about Confirmation message. Here is some background informati= on.

            =A0

            Context: e.g.<= /font>

            =A0 =A0 - node sends a report and want to know if the report is accepted= .,=A0

            =A0 =A0 - ME sends a action request= and want to know if/when the action taken.

            Options:

            =A0 =A0(1) Nothing

            =A0 =A0(2) Rely on transport mechanism (e.g. confirmable CoAP message)

            = =A0 =A0(3) App-level ACK type

            =A0 =A0(4) Use different flow (i.e. action flow)=

            =A0

            IMHO, different control flow may have different requirement for confirma= tion message.

            =A0 =A0 (1) Action Flow, ne= eds a App-level confirmation, like Succ/Fail

            =A0 =A0 (2) Query Flow, automatically has the confirmation, i.e. the mes= sage packet corresponding to a specific query.<= /p>

            =A0= =A0 (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer op= tion (1) and (3), i.e. the confirmation message is an option, but if a conf= irmation message is needed, it should be App-level Ack, instead of transpor= t layer confirmation, which will give 6top more flexibility.<= u>

            =A0

            What do you think?

            =A0

            Thanks<= u>

            Qin

            =A0 =A0=A0

            =A0

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            =A0


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            =A0<= u>


            _________________= ______________________________
            6tsch mailing list
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            =A0

            =A0=

            =A0

            =A0

<= /div>

=A0


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<= span style=3D"font-size:12.0pt">=A0



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--
DIEGO DUJOVNE
Ac= ad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones
= Facultad de Ingenier=EDa UDP
www.ingenieria.udp.cl
(56 2) 676 8125
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charset=ISO-8859-1 Qin, Diego, My 2 cents. I agree with you that it would be nice for the PCE to be able to get some per-channel information. Although adaptive channel hopping (i.e. selectively blacklisting frequencies for a specific bundle) is appealing in principle, it's unclear (at least to me) whether the gains clearly outweigh the overhead (complexity, signalign traffic) one has to pay to coordinate this [1-5]. My opinion is that we should enable both metrics averages over all channels, and per-channel metrics. In some configurations, one can imagine gathering the former by default, and querying for the latter on specific occasions. Having the option of gathering per-channel information does enable us to be future-proof against future adaptive channel hopping algorithm. For sure, this makes for a great question: how do a pair of motes and the PCE have to communicate to enable adaptive channel hopping on that link? The answer to that might directly impact the application payload formats we have are talking about. Is this something you be interested in looking further into? Thomas [1] A Decentralized Scheduling Algorithm for Time Synchronized Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Alexandre M. Bayen. ICST Transactions on Mobile Communications and Applications, 11(7-9). European Union Digital Library link. doi:10.4108/icst.trans.mca.2011.e5. September 2011. [2] A Decentralized Scheduling Algorithm for Time Synchronized Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister. International Conference on Ad Hoc Networks (ADHOCNETS), Victoria, BC, Canada, 18-20 August 2010. [3] Mitigating Multipath Fading Through Channel Hopping in Wireless Sensor Networks. Thomas Watteyne, Steven Lanzisera, Ankur Mehta, Kris Pister. IEEE International Conference on Communications (ICC), Cape Town, South Africa, 23-27 May, 2010. [4] Feasibility Analysis of Controller Design for Adaptive Channel Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven Glaser, Kris Pister. First International Workshop on Performance Methodologies and Tools for Wireless Sensor Networks (WSNPerf), Pisa, Italy, 23 October 2009. [5] Reliability Through Frequency Diversity: Why Channel Hopping Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM International Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife, Canary Islands, Spain, 26-30 October 2009. On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne < diego.dujovne@mail.udp.cl> wrote: > Hello Qin, > I think that a per-frequency report will help the PCE > to decide which frequency to use, and maybe temporarily > black-list them. For example, a dynamic scheme may include > sampling the blacklisted frequencies every X minutes to re-enable > them once the interference has disappeared. > This will require the node to refresh the RSSI > and LQI values in a opportunistic way (every time the a cell > uses that frequency) to save energy. > > Any thoughts? > > Diego > --047d7b33cbeee64bc604e644ebdf Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Qin, Diego,

My 2 cents. I agree w= ith you that it would be nice for the PCE to be able to get some per-channe= l information. Although adaptive channel hopping (i.e. selectively blacklis= ting frequencies for a specific bundle) is appealing in principle, it's= unclear (at least to me) whether the gains clearly outweigh the overhead (= complexity, signalign traffic) one has to pay to coordinate this [1-5].

My opinion is that we should enable both metrics averag= es over all channels, and per-channel metrics. In some configurations, one = can imagine gathering the former by default, and querying for the latter on= specific occasions. Having the option of gathering per-channel information= does enable us to be future-proof against future adaptive channel hopping = algorithm.

For sure, this makes for a great question: how do a pai= r of motes and the PCE have to communicate to enable adaptive channel hoppi= ng on that link? The answer to that might directly impact the application p= ayload formats we have are talking about. Is this something you be interest= ed in looking further into?

Thomas

[1] A Decentralized Scheduling Algorithm for Time S= ynchronized Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Al= exandre M. Bayen. ICST Transactions on Mobile Communications and Applicatio= ns, 11(7-9). European Union Digital Library link. doi:10.4108/icst.trans.mc= a.2011.e5. September 2011.
[2] A Decentralized Scheduling Algorithm for Time Synchronized Channel Hopp= ing. Andrew Tinka, Thomas Watteyne, Kris Pister. International Conference o= n Ad Hoc Networks (ADHOCNETS), Victoria, BC, Canada, 18-20 August 2010.
[3] Mitigating Multipath Fading Through Ch= annel Hopping in Wireless Sensor Networks. Thomas Watteyne, Steven Lanziser= a, Ankur Mehta, Kris Pister. IEEE International Conference on Communication= s (ICC), Cape Town, South Africa, 23-27 May, 2010.
[4] Feasibility Analysis of Controller Design fo= r Adaptive Channel Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco= , Steven Glaser, Kris Pister. First International Workshop on Performance M= ethodologies and Tools for Wireless Sensor Networks (WSNPerf), Pisa, Italy,= 23 October 2009.
[5] Reliability Through Frequency Diversity: Why= Channel Hopping Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Si= xth ACM International Symposium on Performance Evaluation of Wireless Ad Ho= c, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife, Canary Islands, Sp= ain, 26-30 October 2009.

On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego= Dujovne <diego.dujovne@mail.udp.cl> wrote:
Hello Qin,
=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0 I think that a per-frequency report will help the PCE=
to decide which frequency to use, and maybe temporarily
black-= list them. For example, a dynamic scheme may include
sampling the blacklisted frequencies every X minutes to re-enable
= them once the interference has disappeared.
=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0 This will require the node to refresh the RSSI
and LQI values in a opportunistic way (every time the a cell
uses that frequency) to save energy.
=A0 =A0 =A0 = =A0 =A0 =A0=A0
Any thoughts?

=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Diego=
--047d7b33cbeee64bc604e644ebdf-- From qinwang@berkeley.edu Fri Sep 13 07:55:04 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5E09F11E81F2 for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 07:55:04 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0 X-Spam-Level: X-Spam-Status: No, score=x tagged_above=-999 required=5 tests=[] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id SAwUA5TD2PuI for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 07:55:04 -0700 (PDT) Received: from mail-ie0-f171.google.com (mail-ie0-f171.google.com [209.85.223.171]) by ietfa.amsl.com (Postfix) with ESMTP id 8BEF111E8180 for <6tsch@ietf.org>; Fri, 13 Sep 2013 07:55:03 -0700 (PDT) Received: by mail-ie0-f171.google.com with SMTP id at1so2805192iec.30 for <6tsch@ietf.org>; Fri, 13 Sep 2013 07:55:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=upU1Etc4Vu9gATgWk/G6llYSqs4sjBiArxhd9MVEUlk=; b=WXrZKA/+I9h+UFOP6qUJ0SEuEASjFSJsWeBGB64IEHugo/LiRQQJNvBWjvnV8WhSbV mh6erf1ELwI5T03xLSB1/Ll1zIFi671XLNkJpPyg0JufEMkDkKX++4elCbN4uuyuNool muZiJES5PvziV/4sTdfKk3TiSrLyK6y3/chx/mO17pDJkhAANQIRuCOM60uLk0bbP3ki 0OOQ1ToBELHDsXqZm5hYVLCFZnBn3p4BrcvJaJinSYWceQkW2iS6Jyke3zsFVL5+hXxP 2TUu7Xm9r37FYlRWgjdcc6BMx+pfWr1icW1uQ8eK8pXdjewcm+vimFqqTH2WuBXRohNH INaw== X-Gm-Message-State: ALoCoQnSFVz0/x9Y+Sqzjb6kSYU8lbKZK/bwFKb80/nvJo++4LkrKeg0ZIxLQleC8PdHkHQNeakh MIME-Version: 1.0 X-Received: by 10.50.73.41 with SMTP id i9mr1502157igv.30.1379084103002; Fri, 13 Sep 2013 07:55:03 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Fri, 13 Sep 2013 07:55:02 -0700 (PDT) In-Reply-To: References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> Date: Fri, 13 Sep 2013 22:55:02 +0800 Message-ID: From: Qin Wang To: "Prof. Diego Dujovne" Content-Type: multipart/related; boundary=089e013a0270134ad604e6450aba Cc: Thomas Watteyne , 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 14:55:04 -0000 --089e013a0270134ad604e6450aba Content-Type: multipart/alternative; boundary=089e013a0270134ad304e6450ab9 --089e013a0270134ad304e6450ab9 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Diego, Comparing the per-frequency report with the RSSI/LQI in the per-neighbor report defined on https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents, I think the first one refers to the radio condition in a area, not specific to a neighbor; and the second one likely focuses on the average RSSI/LQI of all frequencies applied in a cell/bundle, not specific to a radio frequency. Make sense? Thanks Qin On Fri, Sep 13, 2013 at 10:23 PM, Prof. Diego Dujovne < diego.dujovne@mail.udp.cl> wrote: > Hello Qin, > I think that a per-frequency report will help the PCE > to decide which frequency to use, and maybe temporarily > black-list them. For example, a dynamic scheme may include > sampling the blacklisted frequencies every X minutes to re-enable > them once the interference has disappeared. > This will require the node to refresh the RSSI > and LQI values in a opportunistic way (every time the a cell > uses that frequency) to save energy. > > Any thoughts? > > Diego > > > > > > 2013/9/13 Qin Wang > >> Hi Thomas and All, >> >> I think the per-frequency report (or called per-channel report in >> ISA100.11a) is important, because PCE can use it to build black frequenc= y >> list and update channel hopping sequence. But, I'm not sure if it makes >> implementation too complex or not. >> >> Thought? >> >> Qin >> >> >> On Fri, Sep 13, 2013 at 8:48 AM, Thomas Watteyne < >> watteyne@eecs.berkeley.edu> wrote: >> >>> Pouria, >>> Thanks again for the overview, which complements your first document >>> nicely. >>> >>> Alfredo, >>> Could you please elaborate what you mean by in-network processing? Are >>> you referring to a distributed way for the nodes to "consume" this data= , >>> some fusion as the data trickles up the DAG, or something else? >>> >>> Thomas >>> >>> >>> On Thu, Sep 12, 2013 at 12:34 AM, Alfredo Grieco < >>> alfredo.grieco@gmail.com> wrote: >>> >>>> Hi All,**** >>>> >>>> ** ** >>>> >>>> Do you think is it feasible to add a bit/flag that allows some form of >>>> in-network processing ? **** >>>> >>>> ** ** >>>> >>>> This would be very useful to distributed/decentralized scheduling >>>> techniques and should not cost that much.**** >>>> >>>> ** ** >>>> >>>> Any thoughts is welcome.**** >>>> >>>> ** ** >>>> >>>> Cheers**** >>>> >>>> ** ** >>>> >>>> Alfredo**** >>>> >>>> ** ** >>>> >>>> *Da:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *Per >>>> conto di *P.Zand@utwente.nl >>>> *Inviato:* Wednesday, September 11, 2013 10:45 PM >>>> *A:* xvilajosana@eecs.berkeley.edu; watteyne@eecs.berkeley.edu >>>> *Cc:* 6tsch@ietf.org >>>> *Oggetto:* Re: [6tsch] report flow contents**** >>>> >>>> ** ** >>>> >>>> Thomas,**** >>>> >>>> I agree with you that "source route failed" and "graph route failed" >>>> are out of scope of 6TiSCH.**** >>>> >>>> Regarding to you question about the per-channel report, I think they >>>> are based on each radio channel supported by the specification (channe= l >>>> 11-26 in 2.4GHz in IEEE 802.15.4), not channel offset. And a channel r= eport >>>> generated for all neighbor.**** >>>> >>>> Regarding to your first question, let me now explain more. I think bot= h >>>> of these standard provide a mechanisms to make it possible for >>>> System/Network Manager to also read (pull) desired attributes (But not= all >>>> the feature in 6TiSCH). For example in WirelessHART [1], by =93Report >>>> Neighbor Health List=94 request, the network manager might mention the= number >>>> of neighbors to be read in =93Number of Neighbor entries read=94 field= .. ** >>>> ** >>>> >>>> I think, ISA100.11a provides more mechanisms for System manager to get >>>> the desired attributes from the field devices. And the first two featu= res >>>> that you mentioned might also be supported by ISA100.11a.**** >>>> >>>> In ISA100.11a, three mechanisms are provided for reporting diagnostic >>>> information contained in dlmo.NeighborDiag (described in section 1 lat= er) >>>> and dlmo.ChannelDiag (described in Section 2 later):**** >>>> >>>> 1. The health reports concentrator object (HRCO), can be configured >>>> to report any attribute in the DL *on a* *periodic basis*. >>>> dlmo.NeighborDiag entries (shown in Table 2) and dlmo.ChannelDiag (= shown in >>>> Table 5) can be reported through that mechanism. Through the HRCO, = the >>>> system manager can configure the device to report NeighborDiag >>>> periodically, such as every 30 minutes. Following each such report,= on a >>>> per-entry basis, NeighborDiag counts shall be reset to zero. Levels= shall >>>> use the current value as a starting point for the next period [2].*= * >>>> ** >>>> 2. Diagnostic information can be retrieved at any time by the >>>> system manager, by reading the applicable attributes. The system ma= nager >>>> can read (poll) NeighborDiag as a read-only attribute *on a >>>> per-entry basis*. As in an HRCO report, counts shall be reset to >>>> zero when read [2].**** >>>> 3. Diagnostic information can be reported by the DL on *an >>>> exception basis*, through the DL_Connectivity alert (Described in >>>> section 3(a)). The DL can additionally be configured, through the >>>> dlmo.AlertPolicy attribute (shown in Table 6), to report NeighborDi= ag >>>> information when diagnostic values exceed a threshold. Only the row >>>> triggering the alert is reported. No values are reset [2]. **** >>>> >>>> ** ** >>>> >>>> In ISA100.11a, the system manager establishes a DL communication >>>> relationship between a device and its neighbor by adding an entry to t= he >>>> device=92s dlmo.Neighbor attribute (see Table 1). Each such entry spec= ifies a >>>> level of diagnostics to be collected, through the field >>>> dlmo.Neighbor[].DiagLevel. For each neighbor, diagnostics may be colle= cted >>>> at a baseline level, or a detailed level including clock diagnostics [= 2]. >>>> This levels are described in Section 1.**** >>>> >>>> *Table **1. dlmo.Neighbor fields [2]* >>>> >>>> *Field name* >>>> >>>> *Field encoding* >>>> >>>> * Index (16-bit address of neighbor)**** >>>> >>>> ExtDlUint (used as an index)**** >>>> >>>> EUI64 (EUI-64 identifier of the neighbor)**** >>>> >>>> Type: Unsigned64**** >>>> >>>> =85**** >>>> >>>> =85**** >>>> >>>> *DiagLevel* (selection of neighbor diagnostics to collect)**** >>>> >>>> Type: Unsigned2**** >>>> >>>> Bit0 =3D 1 Collect link diagnostics**** >>>> >>>> Bit1 =3D 1 Collect clock diagnostics**** >>>> >>>> =85**** >>>> >>>> =85**** >>>> >>>> ** ** >>>> >>>> When the dlmo.Neighbor[].DiagLevel field is set for a particular >>>> neighbor, the DL shall create corresponding entries in the read-only >>>> attribute dlmo.NeighborDiag. NeighborDiag values are accumulated from = the >>>> time that the dlmo.NeighborDiag entry is created [2].**** >>>> >>>> ***1. ****dlmo.NeighborDiag:* >>>> >>>> dlmo.NeighborDiag is an indexed OctetString collection that contains >>>> diagnostics for a set of neighbors. The attribute is read-only, with r= ows >>>> created as needed by the DL [2].**** >>>> >>>> NeighborDiag entries are instantiated by the system manager, by settin= g >>>> dlmo.Neighbor[].DiagLevel bits to non-zero values. Iff (if and only if= ) >>>> Bit0=3D1, then summary diagnostics shall be collected for the neighbor= , >>>> consolidated across all channels. Iff Bit1=3D1, then detailed clock >>>> diagnostics shall be collected for the neighbor, consolidated across a= ll >>>> radio channels [2].**** >>>> >>>> *Table **2. dlmo.NeighborDiag fields [2]* >>>> >>>> Field name**** >>>> >>>> Field encoding**** >>>> >>>> * Index**** >>>> >>>> Type: ExtDlUint (neighbor address, used as an index)**** >>>> >>>> *Summary* >>>> >>>> Type: OctetString (see Table 3)**** >>>> >>>> *ClockDetail* >>>> >>>> Type: OctetString (see Table 4)**** >>>> >>>> ** ** >>>> >>>> *Table **3. Diagnostic Summary OctetString fields [2]* >>>> >>>> Field name**** >>>> >>>> Field encoding**** >>>> >>>> RSSI (level)**** >>>> >>>> Type: Integer8**** >>>> >>>> RSQI (level)**** >>>> >>>> Type: Unsigned8**** >>>> >>>> RxDPDU (count)**** >>>> >>>> Type: ExtDlUint**** >>>> >>>> TxSuccessful (count)**** >>>> >>>> Type: ExtDlUint**** >>>> >>>> TxFailed (count)**** >>>> >>>> Type: ExtDlUint**** >>>> >>>> TxCCA_Backoff (count)**** >>>> >>>> Type: ExtDlUint**** >>>> >>>> TxNACK (count)**** >>>> >>>> Type: ExtDlUint**** >>>> >>>> ClockSigma (level)**** >>>> >>>> Type: Integer16**** >>>> >>>> ** ** >>>> >>>> *Table **4. Diagnostic ClockDetail OctetString fields [2]* >>>> >>>> Field name**** >>>> >>>> Field encoding**** >>>> >>>> ClockBias (level, signed)**** >>>> >>>> Type: Integer16**** >>>> >>>> ClockCount (count)**** >>>> >>>> Type: ExtDlUint**** >>>> >>>> ClockTimeout (count)**** >>>> >>>> Type: ExtDlUint**** >>>> >>>> ClockOutliers (count)**** >>>> >>>> Type: ExtDlUint**** >>>> >>>> ** ** >>>> >>>> **2. ***dlmo.ChannelDiag*:**** >>>> >>>> dlmo.ChannelDiag is a read-only dynamic attribute that reports DPDU >>>> transmit failure rates on each radio channel supported by the >>>> specification. This enables the system manager to be aware of consiste= nt >>>> connectivity problems on a per-channel basis, as a diagnostic for spec= trum >>>> management in a subnet [2].**** >>>> >>>> Two diagnostics are reported for each channel, each indicating a >>>> different type of failure. **** indicates the percentage of time that >>>> unicast DPDU transmissions on channel N did not receive an ACK or a NA= CK. >>>> **** indicates the percentage of time that unicast DPDU transmissions >>>> on channel N were aborted due to CCA. [2]**** >>>> >>>> *Table **5. dlmo.ChannelDiag fields* >>>> >>>> Field name**** >>>> >>>> Field encoding**** >>>> >>>> Count (Number of attempted unicast transmissions for all channels)**** >>>> >>>> Type:Unsigned16**** >>>> >>>> **** (Percentage of time transmissions on channel 0 did not receive an >>>> ACK)**** >>>> >>>> Type: Integer8**** >>>> >>>> **** (Percentage of time transmissions on channel 0 aborted due to CCA= ) >>>> **** >>>> >>>> Type: Integer8**** >>>> >>>> =85**** >>>> >>>> ** ** >>>> >>>> **** (Percentage of time transmissions on channel 15 did not receive >>>> an ACK)**** >>>> >>>> Type: Integer8**** >>>> >>>> **** (Percentage of time transmissions on channel 15 aborted due to >>>> CCA)**** >>>> >>>> Type: Integer8**** >>>> >>>> ** ** >>>> >>>> ***3. ****Data link layer alerts* >>>> >>>> 1. *DL_Connectivity alert* >>>> >>>> DL performance diagnostics are accumulated in the attributes >>>> dlmo.NeighborDiag for *per-neighbor* diagnostics, and dlmo.ChannelDiag >>>> for *per-channel* diagnostics. Normally the system manager configures >>>> the HRCO to report these diagnostics periodically, and the DL automati= cally >>>> resets the diagnostic counters whenever these attributes are so report= ed. >>>> Between such reports, diagnostics may indicate a problem that needs to= be >>>> reported to the system manager immediately. The DL_Connectivity alert >>>> provides the mechanism for the DL to report such issues, and the >>>> dlmo.AlertPolicy attribute enables the system manager to set threshold= s for >>>> such reporting [2].**** >>>> >>>> The attribute dlmo.AlertPolicy enables/disables the DL_Connectivity >>>> alert and provides thresholds to control whether alerts are reported. >>>> dlmo.AlertPolicy is an OctetString containing fields as shown in Table= 6 >>>> [2].**** >>>> >>>> *Table **6. dlmo.AlertPolicy fields* >>>> >>>> Field name**** >>>> >>>> Field scalar type**** >>>> >>>> Descriptor (Enables or disabled the DL_Connectivity alert.)**** >>>> >>>> Type Alert report descriptor**** >>>> >>>> NeiMinUnicast (Minimum number of unicast transactions needed for a >>>> neighbor report.)**** >>>> >>>> Type: ExtDlUint**** >>>> >>>> NeiErrThresh (Report neighbor diagnostic if the percentage error rate >>>> reaches this threshold )**** >>>> >>>> Type: Unsigned8**** >>>> >>>> ChanMinUnicast (Minimum number of unicast transactions on a channel >>>> needed as a pre-condition for triggering an alert.)**** >>>> >>>> Type: ExtDlUint**** >>>> >>>> NoAckThresh (Report ChannelDiag if a NoAck value is greater than this >>>> threshold)**** >>>> >>>> Type: Unsigned8**** >>>> >>>> CCABackoffThresh (Report ChannelDiag if a CCABackoff value is greater >>>> than this threshold)**** >>>> >>>> Type: Unsigned8**** >>>> >>>> ** ** >>>> >>>> 1. *NeighborDiscovery alert*** >>>> >>>> The NeighborDiscovery alert provides a mechanism for the DL to report >>>> the contents of the OctetString in dlmo.Candidates attribute (see Tabl= e 7). >>>> **** >>>> >>>> The neighbors in the dlmo.Neighbor attribute are set by the system >>>> manager, not by the device itself. The DL autonomously builds a list o= f >>>> candidate neighbors in the dlmo.Candidates attribute. This list is the= n >>>> forwarded to the system manager. The system manager considers the radi= o >>>> connectivity that is reported in dlmo.Candidates, but may also conside= r >>>> other criteria such as resource constraints, historical performance, o= r >>>> subnet topology [2].**** >>>> >>>> *Table **7. dlmo.Candidates OctetString fields* >>>> >>>> Field name**** >>>> >>>> Field encoding**** >>>> >>>> N (count of discovered neighbors)**** >>>> >>>> Type: Unsigned8**** >>>> >>>> Neighbor1 (16-bit address of first candidate)**** >>>> >>>> Type: ExtDlUint**** >>>> >>>> RSSI1 (radio signal quality of first candidate)**** >>>> >>>> Type: Integer8**** >>>> >>>> RSQI1 (radio signal quality of first candidate)**** >>>> >>>> Type: Unsigned8**** >>>> >>>> etc=85**** >>>> >>>> ** ** >>>> >>>> NeighborN (16-bit address of Nth candidate)**** >>>> >>>> Type: ExtDlUint**** >>>> >>>> RSSIN (radio signal quality of Nth candidate)**** >>>> >>>> Type: Integer8**** >>>> >>>> RSQIN (radio signal quality of Nth candidate)**** >>>> >>>> Type: Unsigned8**** >>>> >>>> ** ** >>>> >>>> *References* >>>> >>>> 1. IEC 62591: Industrial Communication Networks - Wireless >>>> Communication Network and Communication Profiles - WirelessHART.**** >>>> >>>> ** ** >>>> >>>> 2. IEC 62734: Industrial communication networks - Fieldbus >>>> specifications - Wireless systems for industrial automation: process >>>> control and related applications - ISA100.11a.**** >>>> >>>> ** ** >>>> >>>> ** ** >>>> >>>> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >>>> Behalf Of *Xavier Vilajosana Guillen >>>> *Sent:* Wednesday, September 11, 2013 8:54 PM >>>> *To:* Thomas Watteyne >>>> *Cc:* 6TSCH >>>> *Subject:* Re: [6tsch] report flow contents**** >>>> >>>> ** ** >>>> >>>> Hi Thomas, **** >>>> >>>> my 5 cents.**** >>>> >>>> I agree on adding NACK information and timing differences with other >>>> than time source parent neighbors. I will add to the wiki :-)**** >>>> >>>> As regards to the differences of what we do at 6TiSCH and WHart or >>>> ISA100.11a, our proposal is more flexible and has less cohesion with a= cost >>>> of increased complexity (e.g configurable data and reporting period). = We >>>> have to analyse carefully what are the implications in terms of protoc= ol >>>> complexity and implementation of that mechanism versus how often they = would >>>> be used. Could we maybe define some "templates" or default configurati= ons >>>> so using the 6TiSCH can be done without configuration overhead? Then >>>> configuration can be used for those that are really interested on tuni= ng >>>> their system. **** >>>> >>>> just thoughts.. >>>> X**** >>>> >>>> ** ** >>>> >>>> ** ** >>>> >>>> On Wed, Sep 11, 2013 at 9:58 AM, Thomas Watteyne < >>>> watteyne@eecs.berkeley.edu> wrote:**** >>>> >>>> Pouria,**** >>>> >>>> ** ** >>>> >>>> Wonderful list.**** >>>> >>>> ** ** >>>> >>>> Your document clearly highlights that (1) the "report" flows both in >>>> WirelessHART and ISA100.11a are strictly periodic and (1) they have a = fixed >>>> format. From what we have discussed so far, the solutions we are devel= oping >>>> is different in the following ways:**** >>>> >>>> - 6TiSCH offers a mechanism allowing the PCE to configure what data >>>> it want to receive, and configure the trigger for a node to generat= e from >>>> data.**** >>>> - 6TiSCH offers a mechanism allowing the PCE to query the data, on >>>> top of having the nodes push the information**** >>>> - In 6TiSCH, the format of the payload is not fixed. In particular, >>>> it is possible to add application-specific fields, allowing for ext= ensions. >>>> **** >>>> - In 6TiSCH, the transport (CoAP?) and formatting (CBOR?) are >>>> IETF-friendly and integrate well in the IPv6 stack and associated m= echanisms >>>> **** >>>> >>>> Did I get that right?**** >>>> >>>> ** ** >>>> >>>> A couple of questions:**** >>>> >>>> - the WirelessHART "alarms" correspond to a 6TiSCH "events". Yet, I >>>> suppose that a "source route failed" and "graph route failed" are o= ut of >>>> scope of 6TiSCH, but rather part of RPL. I would expect those to th= e ICMPv6 >>>> messages. Thoughts?**** >>>> - About the per-channel report, I assume this is "per frequency", >>>> right? Is a channel report generated for each neighbor?**** >>>> - When comparing your list to *Xavi*'s >>>> https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents:**** >>>> >>>> >>>> - we might want to add a "numNACK" counter to the neighbor >>>> information**** >>>> - we might want to keep timing statistics for all neighbors, not >>>> just time source parents. That is, when I receive a packet from = a neighbor >>>> which is not my time source neighbor, I do not change my clock, = but I still >>>> know the timing error.**** >>>> >>>> Thomas**** >>>> >>>> ** ** >>>> >>>> On Wed, Sep 11, 2013 at 7:18 AM, wrote:**** >>>> >>>> Dear All,**** >>>> >>>> In the following, I listed the performance metrics reported to the >>>> Network/System Manager in WirelessHART and ISA100.11a.**** >>>> >>>> Some reports still need be added, for example the path failure alerts >>>> in ISA100.11a.**** >>>> >>>> Pouria**** >>>> >>>> **** >>>> >>>> *WirelessHART performance metrics***** >>>> >>>> In WirelessHART[1] network the statistics and events are reported to >>>> the Network Manager (act like PCE in 6TiSCH) through the following com= mands: >>>> **** >>>> >>>> 1. Report =93Device Health=94 **** >>>> >>>> This report is sent periodically toward the Network Manager. The repor= t >>>> summaries the communication statistics of a device.**** >>>> >>>> Byte**** >>>> >>>> Format**** >>>> >>>> Description**** >>>> >>>> 0-1**** >>>> >>>> Unsigned-16**** >>>> >>>> Number of packets generated by this device since last report**** >>>> >>>> 2-3**** >>>> >>>> Unsigned-16**** >>>> >>>> Number of packets terminated by this device since last report**** >>>> >>>> 4**** >>>> >>>> Unsigned-8**** >>>> >>>> Number of Data-Link Layer MAC MIC failures detected**** >>>> >>>> 5**** >>>> >>>> Unsigned-8**** >>>> >>>> Number of Network Layer (Session) MIC failures detected**** >>>> >>>> 6**** >>>> >>>> Enum-8**** >>>> >>>> Power Status**** >>>> >>>> 7**** >>>> >>>> Unsigned-8**** >>>> >>>> Number of CRC Errors detected**** >>>> >>>> **** >>>> >>>> 1. Report =93Neighbor Health List=94 **** >>>> >>>> This report is sent periodically toward the Network Manager. The repor= t >>>> includes the statistics of linked neighbors.**** >>>> >>>> Byte**** >>>> >>>> Format**** >>>> >>>> Description**** >>>> >>>> 0**** >>>> >>>> Unsigned-8**** >>>> >>>> Neighbor table index**** >>>> >>>> 1**** >>>> >>>> Unsigned-8**** >>>> >>>> Number of Neighbor entries read**** >>>> >>>> 2**** >>>> >>>> Unsigned-8**** >>>> >>>> Total number of neighbors**** >>>> >>>> 3-4**** >>>> >>>> Unsigned-16**** >>>> >>>> Nickname of neighbor**** >>>> >>>> 5**** >>>> >>>> Bit-8**** >>>> >>>> Neighbor Flags**** >>>> >>>> 6**** >>>> >>>> Signed-8**** >>>> >>>> Mean RSL (Receive Signal Level in dBm) since last report**** >>>> >>>> 7-8**** >>>> >>>> Unsigned-16**** >>>> >>>> Number of Packets transmitted to this neighbor**** >>>> >>>> 9-10**** >>>> >>>> Unsigned-16**** >>>> >>>> Number of Packets received from this neighbor**** >>>> >>>> 11-12**** >>>> >>>> Unsigned-16**** >>>> >>>> Packets received from this neighbor**** >>>> >>>> 13-=85**** >>>> >>>> **** >>>> >>>> Number of entries based on response byte 1**** >>>> >>>> **** >>>> >>>> 1. Report =93Neighbor Signal Levels=94**** >>>> >>>> This report is sent periodically toward the Network Manager. The repor= t >>>> includes the statistics of discovered (but not linked) neighbors. Thes= e >>>> neighbors might be discovered when a device has heard the neighbor >>>> communication in the discovery links. A device that wish to join a net= work, >>>> send a join request to the Network manager, including this report.**** >>>> >>>> Byte**** >>>> >>>> Format**** >>>> >>>> Description**** >>>> >>>> 0**** >>>> >>>> Unsigned-8**** >>>> >>>> Neighbor table index**** >>>> >>>> 1**** >>>> >>>> Unsigned-8**** >>>> >>>> Number of Neighbor entries read**** >>>> >>>> 2**** >>>> >>>> Unsigned-8**** >>>> >>>> Total number of neighbors**** >>>> >>>> 3-4**** >>>> >>>> Unsigned-16**** >>>> >>>> Nickname of neighbor**** >>>> >>>> 5**** >>>> >>>> Signed-8**** >>>> >>>> RSL of neighbor in dB**** >>>> >>>> 6-8**** >>>> >>>> **** >>>> >>>> Repeats (as needed) based on response byte 1**** >>>> >>>> **** >>>> >>>> 1. Alarm =93Path Down=94 **** >>>> >>>> The alarm is sent upon detecting a path failure. **** >>>> >>>> Byte**** >>>> >>>> Format**** >>>> >>>> Description**** >>>> >>>> 0-1**** >>>> >>>> Unsigned-16**** >>>> >>>> Nickname of neighbor to which path failure was detected**** >>>> >>>> **** >>>> >>>> 1. Alarm "Source Route Failed"**** >>>> >>>> This alarm is sent upon detecting a source route failure.**** >>>> >>>> Byte**** >>>> >>>> Format**** >>>> >>>> Description**** >>>> >>>> 0-1**** >>>> >>>> Unsigned-16**** >>>> >>>> Nickname of unreachable neighbor in the source route**** >>>> >>>> 2-5**** >>>> >>>> Unsigned-32**** >>>> >>>> Network-Layer MIC (i.e., the MIC generated using the session key) from >>>> the NPDU that failed routing**** >>>> >>>> **** >>>> >>>> 1. Alarm "Graph Route Failed"**** >>>> >>>> This alarm is sent upon detecting a graph route failure.**** >>>> >>>> Byte**** >>>> >>>> Format**** >>>> >>>> Description**** >>>> >>>> 0-1**** >>>> >>>> Unsigned-16**** >>>> >>>> Graph Id of the failed route**** >>>> >>>> **** >>>> >>>> >>>> **** >>>> >>>> **** >>>> >>>> *ISA100.11a performance metric***** >>>> >>>> In ISA100.11a[2], the L2 performance metrics are reported to the Syste= m >>>> Manager (act like PCE in 6TiSCH) and can be classified into (1) >>>> DL_Connectivity alert and (2) NeighborDiscovery alert.**** >>>> >>>> 1. DL_Connectivity alert**** >>>> >>>> The DL_connectivity alert can be classified into (a) Per-neighbor >>>> reports and (b) Per-channel reports. **** >>>> >>>> - *Per-neighbor report***** >>>> >>>> Per-neighbor reports are the performance metrics about the neighbors >>>> connection and are reported to the System Manager. These statistics ar= e >>>> accumulated in the =93dlmo.NeighborDiag=94 attribute, for each neighbo= r. This >>>> report is similar to =93Neighbor Health List=94 report in WirelessHART= . *** >>>> * >>>> >>>> Each node in ISA100.11a might be asked to report the following >>>> statistics about its neighbor:**** >>>> >>>> **** >>>> >>>> Octets**** >>>> >>>> Format**** >>>> >>>> Description**** >>>> >>>> 1**** >>>> >>>> Signed-8**** >>>> >>>> RSSI (level)**** >>>> >>>> 1**** >>>> >>>> Unsigned-8**** >>>> >>>> RSQI (level)**** >>>> >>>> 1-2**** >>>> >>>> ExtDLUint**** >>>> >>>> RxDPDU(count): Number of valid Packets received from this neighbor ***= * >>>> >>>> 1-2**** >>>> >>>> ExtDLUint**** >>>> >>>> TxSuccessful (count):Count of successful unicast transmissions to the >>>> neighbor **** >>>> >>>> 1-2**** >>>> >>>> ExtDLUint**** >>>> >>>> TxFailed (count): Number of unicast transmission, without getting any >>>> ACK or NACK**** >>>> >>>> 1-2**** >>>> >>>> ExtDLUint**** >>>> >>>> TxCCA_Backoff (count): Number of unicast transmission aborted due to C= CA >>>> **** >>>> >>>> 1-2**** >>>> >>>> ExtDLUint**** >>>> >>>> TxNACK (count): Number of NACKs received**** >>>> >>>> 2**** >>>> >>>> Signed-16**** >>>> >>>> ClockSigma (level): A rough estimate of standard deviation of clock >>>> corrections**** >>>> >>>> **** >>>> >>>> - *Per-channel report***** >>>> >>>> In addition, in ISA100.11a, several performance metrics are reported >>>> based on channel for all neighbors to the System Manager. These statis= tics >>>> are accumulated in the =93dlmo.ChannelDiag=94 attribute. This report i= s similar >>>> to =93Device Health=94 report in WirelessHART.**** >>>> >>>> Byte**** >>>> >>>> Format**** >>>> >>>> Description**** >>>> >>>> 0-2**** >>>> >>>> Unsigned-16**** >>>> >>>> Count (Number of attempted unicast transmissions for all channels)**** >>>> >>>> 3**** >>>> >>>> Integer-8**** >>>> >>>> (Percentage of time transmissions on channel 0 did not receive an ACK)= * >>>> *** >>>> >>>> 4**** >>>> >>>> Integer-8**** >>>> >>>> (Percentage of time transmissions on channel 0 aborted due to CCA)**** >>>> >>>> =85**** >>>> >>>> **** >>>> >>>> **** >>>> >>>> 33**** >>>> >>>> Integer-8**** >>>> >>>> (Percentage of time transmissions on channel 15 did not receive an ACK= ) >>>> **** >>>> >>>> 34**** >>>> >>>> Integer-8**** >>>> >>>> (Percentage of time transmissions on channel 15 aborted due to CCA)***= * >>>> >>>> **** >>>> >>>> 1. NeighborDiscovery alert**** >>>> >>>> In ISA100.11a, each node sends a report, including a list of candidate >>>> (overheard) neighbors, to the System Manager to make a potential new >>>> routing decisions. The =93dlmo.Candidates=94 attributed is used to sto= re those >>>> information in each node in the L2. This report is similar to the =93N= eighbor >>>> Signal Levels=94 report in WirelessHART.**** >>>> >>>> Octets**** >>>> >>>> Format**** >>>> >>>> Description**** >>>> >>>> 1**** >>>> >>>> Unsigned-8**** >>>> >>>> N (count of discovered neighbors)**** >>>> >>>> 0-2**** >>>> >>>> ExtDlUint**** >>>> >>>> address**** >>>> >>>> 0-1**** >>>> >>>> Signed-8**** >>>> >>>> **** >>>> >>>> 0-1**** >>>> >>>> Unsigned-8**** >>>> >>>> **** >>>> >>>> =85**** >>>> >>>> **** >>>> >>>> **** >>>> >>>> 0-2**** >>>> >>>> ExtDlUint**** >>>> >>>> address**** >>>> >>>> 0-1**** >>>> >>>> Signed-8**** >>>> >>>> **** >>>> >>>> 0-1**** >>>> >>>> Unsigned-8**** >>>> >>>> **** >>>> >>>> **** >>>> >>>> * ***** >>>> >>>> *References***** >>>> >>>> 1. IEC 62591: Industrial Communication Networks - Wireless >>>> Communication Network and Communication Profiles - WirelessHART.**** >>>> >>>> **** >>>> >>>> 2. IEC 62734: Industrial communication networks - Fieldbus >>>> specifications - Wireless systems for industrial automation: process >>>> control and related applications - ISA100.11a.**** >>>> >>>> **** >>>> >>>> **** >>>> >>>> **** >>>> >>>> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >>>> Behalf Of *Thomas Watteyne >>>> *Sent:* Saturday, September 07, 2013 7:43 PM >>>> *To:* Xavi Vilajosana >>>> *Cc:* Pascal Thubert (pthubert); 6tsch@ietf.org >>>> *Subject:* Re: [6tsch] report flow contents**** >>>> >>>> **** >>>> >>>> Xavi,**** >>>> >>>> Great, thanks!**** >>>> >>>> Thomas**** >>>> >>>> **** >>>> >>>> On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen < >>>> xvilajosana@eecs.berkeley.edu> wrote:**** >>>> >>>> Hi, >>>> I created the scratchpad section in the wiki to keep ideas >>>> https://bitbucket.org/6tsch/meetings/wiki/Home >>>> >>>> >>>> and added the flow content information here. >>>> >>>> https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents**** >>>> >>>> have a nice weekend!**** >>>> >>>> X**** >>>> >>>> **** >>>> >>>> On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana Guillen < >>>> xvilajosana@eecs.berkeley.edu> wrote:**** >>>> >>>> Hi Pascal, it is a good idea!**** >>>> >>>> I will collect that information and as Thomas put it at the wiki so we >>>> do not lose it. >>>> >>>> :-)**** >>>> >>>> X**** >>>> >>>> **** >>>> >>>> On Fri, Sep 6, 2013 at 8:51 AM, Pascal Thubert (pthubert) < >>>> pthubert@cisco.com> wrote:**** >>>> >>>> Hello Xavi:**** >>>> >>>> **** >>>> >>>> At the call I mentioned we could use info on tracks and cells as well, >>>> probably on demand from the PCE.**** >>>> >>>> For instance, the PCE could observe energy levels over some cells for >>>> a while to make sure they are clean.**** >>>> >>>> **** >>>> >>>> What do you think?**** >>>> >>>> Pascal**** >>>> >>>> **** >>>> >>>> *From:* 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] *On >>>> Behalf Of *Xavier Vilajosana Guillen >>>> *Sent:* vendredi 6 septembre 2013 01:17 >>>> *To:* Thomas Watteyne >>>> *Cc:* 6tsch@ietf.org >>>> *Subject:* Re: [6tsch] report flow contents**** >>>> >>>> **** >>>> >>>> agreed!**** >>>> >>>> So the fields become:**** >>>> >>>> **** >>>> >>>> **** >>>> >>>> For each known neighbor:**** >>>> >>>> -ID**** >>>> >>>> -AVG RSSI in a running window**** >>>> >>>> -Latest RSSI**** >>>> >>>> -AVG LQI in a running window [optional]**** >>>> >>>> -Latest LQI [optional]**** >>>> >>>> -Num TX packets (option in case there is communication with that >>>> neighbor)**** >>>> >>>> -Num ACK packets (option in case there is communication with that >>>> neighbor)**** >>>> >>>> -Num RX packets (option in case there is communication with that >>>> neighbor)**** >>>> >>>> -Last ASN when it heart about that neighbor **** >>>> >>>> -Bundle: Num links in the Schedule to that neighbor**** >>>> >>>> -PDR per link [Optional -- or maybe best and worst PDR only]**** >>>> >>>> **** >>>> >>>> -Option Flag (weather there are optional TLV fields on that category)= * >>>> *** >>>> >>>> +(TLV objects)* **** >>>> >>>> **** >>>> >>>> -For each Queue:**** >>>> >>>> - Avg Queue length in a running window**** >>>> >>>> - Max Queue length in a running window (peak)**** >>>> >>>> - Current Queue length (?)**** >>>> >>>> - ASN of the oldest packet in the QUEUE?**** >>>> >>>> -Option Flag (weather there are optional TLV fields on that >>>> category)**** >>>> >>>> +(TLV objects)* **** >>>> >>>> **** >>>> >>>> -Time source parent**** >>>> >>>> -ID**** >>>> >>>> -Avg clock drift (correction done) in a running window**** >>>> >>>> -Latest clock correction**** >>>> >>>> -Parent changes (counter of how many times I changed my time sourc= e >>>> parent)**** >>>> >>>> -Option Flag (weather there are optional TLV fields on that >>>> category)**** >>>> >>>> +(TLV objects)* **** >>>> >>>> **** >>>> >>>> -Option Flag (weather there are optional TLV fields in other categorie= s) >>>> **** >>>> >>>> +(TLV objects)* **** >>>> >>>> **** >>>> >>>> as regards to this:**** >>>> >>>> **** >>>> >>>> "Finally, do you envision a generic mechanism whereby the PCE can turn >>>> fields on/off, or triggered independently?"**** >>>> >>>> **** >>>> >>>> I see it as CoAP Options, where a set of bytes can be used as "clever >>>> bitmap" to tell what options are there, the parsing will decode option= by >>>> option and will read the fields. In that way any combination of fields= is >>>> supported.**** >>>> >>>> **** >>>> >>>> would that work?**** >>>> >>>> X**** >>>> >>>> **** >>>> >>>> On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne < >>>> watteyne@eecs.berkeley.edu> wrote:**** >>>> >>>> Xavi,**** >>>> >>>> **** >>>> >>>> Fantastic!**** >>>> >>>> **** >>>> >>>> I believe PDR for each link might be too long to fit in a packet. Whil= e >>>> the mote will most likely keep that information, we could move that to= the >>>> query flow, i.e. it is available to the PCE on-demand.**** >>>> >>>> **** >>>> >>>> Would you agree that the number of links in a bundle belongs to the >>>> neighbor? Of maybe we want a "bundle" category?**** >>>> >>>> **** >>>> >>>> In queuing, it might be interesting to see the age of the different >>>> packets, to be able to monitor latency.**** >>>> >>>> **** >>>> >>>> About LQI, there is no general consensus among vendors on what the >>>> definition is, or how exactly it is calculated. I would make it option= al. >>>> **** >>>> >>>> **** >>>> >>>> Also, it might be good to be able to add arbitrary fields to each >>>> category: neighbor, queue, time source neighbor.**** >>>> >>>> **** >>>> >>>> Finally, do you envision a generic mechanism whereby the PCE can turn >>>> fields on/off, or triggered independently?**** >>>> >>>> **** >>>> >>>> Thomas**** >>>> >>>> **** >>>> >>>> On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajosana Guillen < >>>> xvilajosana@eecs.berkeley.edu> wrote:**** >>>> >>>> Hi Thomas, Diego,**** >>>> >>>> **** >>>> >>>> I agree that LQI should be there as well. I update here the list with >>>> Thomas suggestions. **** >>>> >>>> **** >>>> >>>> For each known neighbor:**** >>>> >>>> -ID**** >>>> >>>> -AVG RSSI in a running window**** >>>> >>>> -Latest RSSI**** >>>> >>>> -AVG LQI in a running window**** >>>> >>>> -Latest LQI**** >>>> >>>> -Num TX packets (option in case there is communication with that >>>> neighbor)**** >>>> >>>> -Num ACK packets (option in case there is communication with that >>>> neighbor)**** >>>> >>>> -Num RX packets (option in case there is communication with that >>>> neighbor)**** >>>> >>>> -Last ASN when it heart about that neighbor **** >>>> >>>> **** >>>> >>>> Other fields**** >>>> >>>> -Num links in the Schedule to that neighbor**** >>>> >>>> -For each link PDR**** >>>> >>>> -For each Queue:**** >>>> >>>> - Avg Queue length in a running window**** >>>> >>>> - Max Queue length in a running window (peak)**** >>>> >>>> - Current Queue length (?)**** >>>> >>>> -Time source parent**** >>>> >>>> -ID**** >>>> >>>> -Avg clock drift (correction done) in a running window**** >>>> >>>> -Latest clock correction**** >>>> >>>> -Parent changes (counter of how many times I changed my time sourc= e >>>> parent)**** >>>> >>>> **** >>>> >>>> -Option Flag (weather there are optional TLV fields)**** >>>> >>>> +(TLV objects)* **** >>>> >>>> **** >>>> >>>> **** >>>> >>>> Hope this makes sense.**** >>>> >>>> cheers! >>>> Xavi**** >>>> >>>> **** >>>> >>>> On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne < >>>> watteyne@eecs.berkeley.edu> wrote:**** >>>> >>>> *[renamed thread]***** >>>> >>>> **** >>>> >>>> Xavi,**** >>>> >>>> **** >>>> >>>> A few thoughts:**** >>>> >>>> - the counters (numTx, etc) will only be present for neighbors the nod= e >>>> has communicate with, so they should be optional in the packet.**** >>>> >>>> - you have focused on the topological information (which I think is th= e >>>> right one). It might be useful to gather other data related to >>>> synchronization or queuing.**** >>>> >>>> - I couldn't agree more with your suggestion to make it extensible. >>>> This does mean that we will need to state somewhere that a device need= to >>>> ignore silently fields it does not understand.**** >>>> >>>> **** >>>> >>>> Thomas**** >>>> >>>> **** >>>> >>>> On Thu, Sep 5, 2013 at 11:15 AM, Xavier Vilajosana Guillen < >>>> xvilajosana@eecs.berkeley.edu> wrote:**** >>>> >>>> Hello, I guess that flows are getting defined and I started to think o= n >>>> the contents of the messages on that flows. Not sure if this is the ri= ght >>>> time or I am going way far..**** >>>> >>>> **** >>>> >>>> According to the previous discussion I assume that the five flows are:= * >>>> *** >>>> >>>> **** >>>> >>>> ME-6TOP - Query Flow**** >>>> >>>> ME-6TOP - Action Flow**** >>>> >>>> **** >>>> >>>> 6TOP - ME - Report Flow**** >>>> >>>> 6TOP - ME - Event Flow**** >>>> >>>> 6TOP - ME - Request BW Flow**** >>>> >>>> **** >>>> >>>> I'd like to start defining the content of the messages in the Report >>>> Flow:**** >>>> >>>> **** >>>> >>>> The Report Flow: has to deal with the information that a node knows an= d >>>> has to be sent to the ME so the ME can compute the schedule among othe= rs. >>>> Here I list the information that we can know in a mote and can be use= d at >>>> the ME to compute the schedule (complete please if I miss something)**= * >>>> * >>>> >>>> **** >>>> >>>> For each known neighbor:**** >>>> >>>> -ID**** >>>> >>>> -AVG RSSI in a running window**** >>>> >>>> -Latest RSSI**** >>>> >>>> -Num TX packets**** >>>> >>>> -Num ACK packets**** >>>> >>>> -Num RX packets**** >>>> >>>> -Last ASN when it heart about that neighbor **** >>>> >>>> **** >>>> >>>> Other fields**** >>>> >>>> -Num links in the Schedule to that neighbor**** >>>> >>>> -For each link PDR**** >>>> >>>> **** >>>> >>>> **** >>>> >>>> Then we need to have some TLV like objects that can be used for >>>> ad-hoc/naive/other extensions of the reporting process. In that way we >>>> don't constraint the implementation of the scheduling alg. to that >>>> information.**** >>>> >>>> **** >>>> >>>> what do you think?**** >>>> >>>> X**** >>>> >>>> **** >>>> >>>> On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang >>>> wrote:**** >>>> >>>> Hi all,**** >>>> >>>> **** >>>> >>>> In this thread, we will continue the discussion about Confirmation >>>> message. Here is some background information.**** >>>> >>>> **** >>>> >>>> Context: e.g.**** >>>> >>>> - node sends a report and want to know if the report is accepted., >>>> **** >>>> >>>> - ME sends a action request and want to know if/when the action >>>> taken.**** >>>> >>>> Options:**** >>>> >>>> (1) Nothing**** >>>> >>>> (2) Rely on transport mechanism (e.g. confirmable CoAP message)**** >>>> >>>> (3) App-level ACK type**** >>>> >>>> (4) Use different flow (i.e. action flow)**** >>>> >>>> **** >>>> >>>> IMHO, different control flow may have different requirement for >>>> confirmation message.**** >>>> >>>> (1) Action Flow, needs a App-level confirmation, like Succ/Fail***= * >>>> >>>> (2) Query Flow, automatically has the confirmation, i.e. the >>>> message packet corresponding to a specific query.**** >>>> >>>> (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefe= r >>>> option (1) and (3), i.e. the confirmation message is an option, but if= a >>>> confirmation message is needed, it should be App-level Ack, instead of >>>> transport layer confirmation, which will give 6top more flexibility.**= * >>>> * >>>> >>>> **** >>>> >>>> What do you think?**** >>>> >>>> **** >>>> >>>> Thanks**** >>>> >>>> Qin**** >>>> >>>> **** >>>> >>>> **** >>>> >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch**** >>>> >>>> **** >>>> >>>> >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch**** >>>> >>>> **** >>>> >>>> >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch**** >>>> >>>> **** >>>> >>>> **** >>>> >>>> >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch**** >>>> >>>> **** >>>> >>>> **** >>>> >>>> **** >>>> >>>> **** >>>> >>>> ** ** >>>> >>>> >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch**** >>>> >>>> ** ** >>>> >>> >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > > > -- > DIEGO DUJOVNE > Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones > Facultad de Ingenier=EDa UDP > www.ingenieria.udp.cl > (56 2) 676 8125 > --089e013a0270134ad304e6450ab9 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hi Diego,

Comparing the per-frequency r= eport with the RSSI/LQI in the per-neighbor report defined on=A0=A0https://bitbucket.o= rg/6tsch/meetings/wiki/report_flow_contents, I think the first=A0one re= fers to the radio condition in a area, not specific to a neighbor; and the = second one likely focuses on the average =A0RSSI/LQI of all frequencies app= lied in a cell/bundle, not specific to a radio frequency. Make sense?

Thanks
Qin



On Fri, Sep 13, 2013 = at 10:23 PM, Prof. Diego Dujovne <diego.dujovne@mail.udp.cl>= ; wrote:
He= llo Qin,
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 I think that a pe= r-frequency report will help the PCE
to decide which frequency to use, and maybe temporarily
black-list= them. For example, a dynamic scheme may include
sampling the blacklisted frequencies every X minutes to re-enable
= them once the interference has disappeared.
=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0 This will require the node to refresh the RSSI
and LQI values in a opportunistic way (every time the a cell
uses that frequency) to save energy.
=A0 =A0 =A0 = =A0 =A0 =A0=A0
Any thoughts?

=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Diego=

=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0=A0=A0
=A0
=


2013/9/= 13 Qin Wang <qinwang@berkeley.edu>
Hi Thomas and All,

=
I think the per-frequency report (or called per-channel report i= n ISA100.11a) is important, because PCE can use it to build black frequency= list and update channel hopping sequence. But, I'm not sure if it make= s implementation too complex or not.

Thought?

Qin


On Fri, Sep 13, 201= 3 at 8:48 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu>= wrote:
Pouria,
Thanks again fo= r the overview, which complements your first document nicely.
Alfredo,
Could you please elaborate what you mean by in-netw= ork processing? Are you referring to a distributed way for the nodes to &qu= ot;consume" this data, some fusion as the data trickles up the DAG, or= something else?

Thomas


On Thu, Sep 12, 2013 at 12:34 AM, Alfredo Grieco <= span dir=3D"ltr"><alfredo.grieco@gmail.com> wrote:

Hi All,

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Do you t= hink is it feasible to add a bit/flag that allows some form of in-network p= rocessing ?

=A0

<= font color=3D"#1f497d" face=3D"Calibri">This wou= ld be very useful to distributed/decentralized scheduling techniques and sh= ould not cost that much.

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Any thou= ghts is welcome.

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Cheers

=A0

<= font color=3D"#1f497d" face=3D"Calibri">Alfredo<= u>

=A0

Da: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] Per conto di P.Zand@utwente.nl
Inviato: Wednesday, Septembe= r 11, 2013 10:45 PM
A: xvilajosan= a@eecs.berkeley.edu; watteyne@eecs.berkeley.edu
Cc: 6tsch@ietf.org
Oggetto: Re: [6tsch] report flow contents

=A0

Thomas,

I agree with you that &quo= t;source route failed" and "graph route failed" are out of s= cope of 6TiSCH.

Regarding to you question = about the per-channel report, I think they are based on each radio channel = supported by the specification (channel 11-26 in 2.4GHz in IEEE 802.15.4), = not channel offset. And a channel report generated for all neighbor.=

Regardi= ng to your first question, let me now explain more. I think both of these s= tandard provide a mechanisms to make it possible for System/Network Manager= to also read (pull) desired attributes (But not all the feature in 6TiSCH)= . For example in WirelessHART [1], by =93Report Neighbor Health List=94 req= uest, the network manager might mention the number of neighbors to be read = in =93Number of Neighbor entries read=94 field..

I think= , ISA100.11a provides more mechanisms for System manager to get the desired= attributes from the field devices. And the first two features that you men= tioned might also be supported by ISA100.11a.

In ISA1= 00.11a, three mechanisms are provided for reporting diagnostic information = contained in dlmo.NeighborDiag (described in section 1 later) and dlmo.Chan= nelDiag (described in Section 2 later):

  1. The health reports concentrator object (HRCO), ca= n be configured to report any attribute in the DL on a periodic bas= is. dlmo.NeighborDiag entries (shown in Table 2) and dlmo.Channe= lDiag (shown in Table 5) can be reported through that mechanism. Through th= e HRCO, the system manager can configure the device to report NeighborDiag = periodically, such as every 30 minutes. Following each such report, on a pe= r-entry basis, NeighborDiag counts shall be reset to zero. Levels shall use= the current value as a starting point for the next period [2].
  2. Diagnostic information can= be retrieved at any time by the system manager, by reading the applicable = attributes. The system manager can read (poll) NeighborDiag as a read-only = attribute on a per-entry basis. As in an HRCO report, counts shall be reset to zero when read [2].
  3. Diagnostic information can= be reported by the DL on an exception = basis, through the DL_Connectivity alert (Described in section 3= (a)). The DL can additionally be configured, through the dlmo.AlertPolicy a= ttribute (shown in Table 6), to report NeighborDiag information when diagno= stic values exceed a threshold. Only the row triggering the alert is report= ed. No values are reset [2].

=A0

In ISA1= 00.11a, the system manager establishes a DL communication relationship betw= een a device and its neighbor by adding an entry to the device=92s dlmo.Nei= ghbor attribute (see Table 1). Each such entry specifies a level of diagnos= tics to be collected, through the field dlmo.Neighbor[].DiagLevel. For each= neighbor, diagnostics may be collected at a baseline level, or a detailed = level including clock diagnostics [2]. This levels are described in Section= 1.

Table 1. dlmo.Neighbor fields [2]

Field name=

Field encodin= g

* Index (16-bit address of neighbor)

ExtDlUint (used as an index)<= /u>

= EUI64 (EUI-64 identifier of the neighbor)=

Type: Unsigned64

= =85

= =85

DiagLevel (selection of neighbor diagnostics to collect)=

Type: Unsigned2<= /p>

Bit0 =3D 1 Colle= ct link diagnostics

Bit1 =3D 1 Collect clock diagnostics=

= =85

= =85

<= /div>

=A0

When the dlmo.Neighbor= [].DiagLevel field is set for a particular neighbor, the DL shall create co= rresponding entries in the read-only attribute dlmo.NeighborDiag. NeighborD= iag values are accumulated from the time that the dlmo.NeighborDiag entry i= s created [2].

1.=A0=A0=A0= =A0=A0 dlmo.NeighborDiag:

dlmo.NeighborDiag is an in= dexed OctetString collection that contains diagnostics for a set of neighbo= rs. The attribute is read-only, with rows created as needed by the DL [2].<= u>

Neighbo= rDiag entries are instantiated by the system manager, by setting dlmo.Neigh= bor[].DiagLevel bits to non-zero values. Iff (if and only if) Bit0=3D1, the= n summary diagnostics shall be collected for the neighbor, consolidated acr= oss all channels. Iff Bit1=3D1, then detailed clock diagnostics shall be co= llected for the neighbor, consolidated across all radio channels [2].

Table 2. dlmo.NeighborDiag fields [2]<= u>

= * Index

= Field name

= Field encoding

= Type: ExtDlUint (neighbor address, used as an index)=

<= span style=3D"font-size:11.0pt;font-family:"Calibri","sans-s= erif";font-weight:bold">Summary

Type: OctetString (see Table 3)<= u>

ClockDetail

Type: OctetString (see Table 4)<= u>

=A0

Table = 3. Diagnostic Summary OctetString fields [2]

= RSSI (level)

= RSQI (level)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= RxDPDU (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= TxSuccessful (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= TxFailed (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= TxCCA_Backoff (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= TxNACK (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= ClockSigma (level)

= Field name

= Field encoding

= Type: Integer8

= Type: Unsigned8

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

= Type: Integer16

<= u>=A0

Table 4. Diagnostic ClockDetail OctetS= tring fields [2]

= ClockBias (level, signed)

= <= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= ClockCount (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= ClockTimeout (count)

<= td style=3D"width:2.2in;border:solid windowtext 1.0pt;border-top:none;paddi= ng:0in 5.4pt 0in 5.4pt" valign=3D"top" width=3D"264">

= ClockOutliers (count)

= Field name

= Field encoding

= Type: Integer16

= Type: ExtDlUint

= Type: ExtDlUint

= Type: ExtDlUint

<= u>=A0

2.=A0=A0=A0=A0=A0 = dlmo.ChannelDiag:

dlmo.ChannelDiag is a read-only dynamic attribute that reports DPDU= transmit failure rates on each radio channel supported by the specificatio= n. This enables the system manager to be aware of consistent connectivity p= roblems on a per-channel basis, as a diagnostic for spectrum management in = a subnet [2].

Two diagnostics are reported for each channel, = each indicating a different type of failure. indicates the percentage o= f time that unicast DPDU transmissions on channel N did not receive an ACK = or a NACK. <= span style=3D"font-size:12.0pt;font-family:"Times New Roman",&quo= t;serif""> indicates the percentage of time that unicast DPDU transmiss= ions on channel N were aborted due to CCA. [2]<= /p>

Table 5. dlmo.ChannelDiag fields

= Count (Number of attempted unicast transmissions for all chann= els)

= Field name

= Field encoding

Type:Unsigned16

(Percentage of time transmissions on channel 0 d= id not receive an ACK)

Type: Integer8

(Percentage of time transmissions on channel 0 a= borted due to CCA)

Type: Integer8

= =85

= =A0

(Percentage of time transmissions on channel 15 = did not receive an ACK)

Type: Integer8

(Percentage of time transmissions on channel 15 = aborted due to CCA)

Type: Integer8

=A0

3.=A0=A0=A0=A0=A0 Data link layer alerts<= /p>

  1. <= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif";font-weight:bold">DL_Connectivity alert<= u>

DL performance diagnostics are accumulated in the attributes dl= mo.NeighborDiag for per-neighbor diagnostics, and dlmo.ChannelDiag for per-channel diagnostics. Normally the system manager confi= gures the HRCO to report these diagnostics periodically, and the DL automat= ically resets the diagnostic counters whenever these attributes are so repo= rted. Between such reports, diagnostics may indicate a problem that needs t= o be reported to the system manager immediately. The DL_Connectivity alert = provides the mechanism for the DL to report such issues, and the dlmo.Alert= Policy attribute enables the system manager to set thresholds for such repo= rting [2].

The attribute dlmo.AlertPolicy enables/disables the DL_Connectivity = alert and provides thresholds to control whether alerts are reported. dlmo.= AlertPolicy is an OctetString containing fields as shown in Table 6 [2].=

Table 6. dlmo.AlertPolicy fields

= Field name

= Field scalar type

= Descriptor (Enables or disabled the DL_Connectivity alert.)=

Type Alert report descriptor<= /u>

NeiMinUnicast (M= inimum number of unicast transactions needed for a neighbor report.)=

Type: ExtDlUint

NeiErrThresh (Re= port neighbor diagnostic if the percentage error rate reaches this threshol= d )

Type: Unsigned8

ChanMinUnicast (= Minimum number of unicast transactions on a channel needed as a pre-conditi= on for triggering an alert.)

Type: ExtDlUint

= NoAckThresh (Report ChannelDiag if a NoAck value is greater th= an this threshold)

Type: Unsigned8

CCABackoffThresh= (Report ChannelDiag if a CCABackoff value is greater than this threshold)<= u>

Type: Unsigned8

=A0

  1. NeighborDiscovery alert

The NeighborDiscovery alert provides a mechanism for the DL to= report the contents of the OctetString in dlmo.Candidates attribute (see T= able 7).

The neighbors in the dlmo.Neighbor attribute are= set by the system manager, not by the device itself. The DL autonomously b= uilds a list of candidate neighbors in the dlmo.Candidates attribute. This = list is then forwarded to the system manager. The system manager considers = the radio connectivity that is reported in dlmo.Candidates, but may also co= nsider other criteria such as resource constraints, historical performance,= or subnet topology [2].

Table 7. dlmo.Candidates OctetString f= ields

Field name

Field encoding

N (count of disc= overed neighbors)

Type: Unsigned8<= u>

Neighbor1 (16-bi= t address of first candidate)

Type: ExtDlUint<= u>

RSSI1 (radio sig= nal quality of first candidate)

Type: Integer8

RSQI1 (radio sig= nal quality of first candidate)

Type: Unsigned8<= u>

etc=85=

=A0

NeighborN (16-bi= t address of Nth candidate)

Type: ExtDlUint<= u>

RSSIN (radio sig= nal quality of Nth candidate)

Type: Integer8

RSQIN (radio sig= nal quality of Nth candidate)

Type: Unsigned8<= u>

=A0

Re= ferences

1.=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0 IEC 62591: Industrial Communication Networks - Wireless Com= munication Network and Communication Profiles - WirelessHART.=

=A0

2.=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0 IEC 62734: Industrial communication networks - Fieldbus specifica= tions - Wireless systems for industrial automation: process control and rel= ated applications - ISA100.11a.

=A0

<= font color=3D"#1f497d" face=3D"Calibri">= =A0

6tsch-bounces@ietf.org [ma= ilto:6tsch-boun= ces@ietf.org] On Behalf Of <= /b>Xavier Vilajosana Guillen
Sent: Wednesday, September 1= 1, 2013 8:54 PM
To: Thoma= s Watteyne
Cc: 6TSCH
<= b>Subject: Re: [6tsch] report f= low contents

=A0

Hi Thomas,

my 5 cents.

I agree on adding = NACK information and timing differences with other than time source parent = neighbors. I will add to the wiki :-)

As regards to t= he differences of what we do at 6TiSCH and WHart or ISA100.11a, our proposa= l is more flexible and has less cohesion with a cost of increased complexit= y (e.g configurable data and reporting period). We have to analyse carefull= y what are the implications in terms of protocol complexity and implementat= ion of that mechanism versus how often they would be used. Could we maybe d= efine some "templates" or default configurations so using the 6Ti= SCH can be done without configuration overhead? Then configuration can be u= sed for those that are really interested on tuning their system. =

just thoughts..
X

=A0=

=A0

On W= ed, Sep 11, 2013 at 9:58 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu> wr= ote:

Pouria,

=A0

Wonderful list.

=A0

Your document clearly highlights that (1)= the "report" flows both in WirelessHART and ISA100.11a are stric= tly periodic and (1) they have a fixed format. From what we have discussed = so far, the solutions we are developing is different in the following ways:=

  • 6TiSCH offers a m= echanism allowing the PCE to configure what data it want to receive, and co= nfigure the trigger for a node to generate from data.<= /font>
  • 6TiSCH offers=A0a mechanism allowing the PCE to que= ry the data, on top of having the nodes push the information<= /span>
  • In 6TiSCH, the format of the payload is not fixed. = In particular, it is possible to add application-specific fields, allowing = for extensions.
  • In 6TiSCH,=A0the transport (CoAP?) and formatting (= CBOR?) are IETF-friendly and integrate well in the IPv6 stack and associate= d mechanisms

= Did I get that right?=

=A0<= /span>

A couple of questions:

  • the = WirelessHART "alarms" correspond to a 6TiSCH "events". = Yet, I suppose that a "source route failed" and "graph route= failed" are out of scope of 6TiSCH, but rather part of RPL. I would e= xpect those to the ICMPv6 messages. Thoughts?
  • About the per-channel report, I assume this is &quo= t;per frequency", right? Is a channel report generated for each neighb= or?
  • When comparing your list to Xavi's=A0https://bitbucket.or= g/6tsch/meetings/wiki/report_flow_contents:=
    • we might= want to add a "numNACK" counter to the neighbor information
    • we might want to keep timing statistics for all nei= ghbors, not just time source parents. That is, when I receive a packet from= a neighbor which is not my time source neighbor, I do not change my clock,= but I still know the timing error.

Thomas

=A0

On Wed, Sep 11, 2013 at 7:18 AM, <P.Zand@utwente.nl> wrot= e:

Dear All,

In the following, I listed the p= erformance metrics reported to the Network/System Manager in WirelessHART a= nd ISA100.11a.

Some= reports still need be added, for example the path failure alerts in ISA100= .11a.

Pour= ia

=A0

WirelessHART performance metrics=

<= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif"">In WirelessHART[1] network the statistics and = events are reported to the Network Manager (act like PCE in 6TiSCH) through= the following commands:

  1. This re= port is sent periodically toward the Network Manager. The report summaries = the communication statistics of a device.

    Byte

    =

    Format

    Description<= /u>

    0-1

    <= /td>

    Unsigned-16<= /u>

    Number of packets generated by this = device since last report

    2-3

    <= /td>

    Unsigned-16<= /u>

    Number of packets terminated by this= device since last report

    4

    Unsigned-8

    Number of Data-Link Layer MAC MIC fa= ilures detected

    5

    Unsigned-8

    Number of Network Layer (Session) MI= C failures detected

    6

    Enum-8

    Power Status=

    7

    Unsigned-8

    Number of CRC Errors detected=

    =A0

    1. Report =93Neighbor Hea= lth List=94

    This report is sent pe= riodically toward the Network Manager. The report includes the statistics o= f linked neighbors.

    Byte

    =

    Format

    Description<= /u>

    0

    Unsigned-8

    Neighbor table index

    1

    Unsigned-8

    Number of Neighbor entries read

    2

    Unsigned-8

    Total number of neighbors

    3-4

    <= /td>

    Unsigned-16<= /u>

    Nickname of neighbor

    5

    Bit-8

    Neighbor Flags<= u>

    6

    Signed-8=

    Mean RSL (Receive Signal Level in dB= m) since last report

    7-8

    <= /td>

    Unsigned-16<= /u>

    Number of Packets transmitted to thi= s neighbor

    9-10

    =

    Unsigned-16<= /u>

    Number of Packets received from this= neighbor

    11-12

    Unsigned-16<= /u>

    Packets received from this neighbor<= /span>

    13-=85

    =A0

    <= /td>

    Number of entries based on response = byte 1

    =A0

    1. Report =93Neighbor Sig= nal Levels=94

    This report is sent pe= riodically toward the Network Manager. The report includes the statistics o= f discovered (but not linked) neighbors. These neighbors might be discovere= d when a device has heard the neighbor communication in the discovery links= . A device that wish to join a network, send a join request to the Network = manager, including this report.

    Byte

    =

    Format

    Description<= /u>

    0

    Unsigned-8

    Neighbor table index

    1

    Unsigned-8

    Number of Neighbor entries read

    2

    Unsigned-8

    Total number of neighbors

    3-4

    <= /td>

    Unsigned-16<= /u>

    Nickname of neighbor

    5

    Signed-8=

    RSL of neighbor in dB<= u>

    6-8

    <= /td>

    =A0

    <= /td>

    Repeats (as needed) based on respons= e byte 1

    =A0

    1. Alarm =93Path Down=94 =

    The alarm is sent upon= detecting a path failure.

    Byte

    Format

    Descriptio= n

    0-1

    Unsigned-16

    Nickname of neighbor to which path failure was detected

    =A0

    1. This al= arm is sent upon detecting a source route failure.<= /u>

      Byte

      =

      Format

      Description<= /u>

      0-1

      <= /td>

      Unsigned-16<= /u>

      Nickname of unreachable neighbor in = the source route

      2-5

      <= /td>

      Unsigned-32<= /u>

      Network-Layer MIC (i.e., the MIC gen= erated using the session key) from the NPDU that failed routing

      =A0

      1. This al= arm is sent upon detecting a graph route failure.

        Byte

        =

        Format

        Description<= /u>

        0-1

        <= /td>

        Unsigned-16<= /u>

        Graph Id of the failed route<= /font>

        =A0

        =A0

        ISA100.11a performance metric

        <= span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&q= uot;,"sans-serif"">In ISA100.11a[2], the L2 performance metrics a= re reported to the System Manager (act like PCE in 6TiSCH) and can be class= ified into (1) DL_Connectivity alert and (2) NeighborDiscovery alert.

        1. The DL= _connectivity alert can be classified into (a) Per-neighbor reports and (b)= Per-channel reports.

            • Per-neighbor report=

          Per-neighbor reports are the=A0 performance metrics abou= t the neighbors connection and are reported to the System Manager. These st= atistics are accumulated in the =93dlmo.NeighborDiag=94 attribute, for each= neighbor. This report is similar to =93Neighbor Health List=94 report in W= irelessHART.

          Each node i= n ISA100.11a might be asked to report the following statistics about its ne= ighbor:

          =A0<= /font>

          Octets

          Format

          Description<= /u>

          1

          Signed-8=

          RSSI (level)=

          1

          Unsigned-8

          RSQI (level)=

          1-2

          <= /td>

          ExtDLUint

          RxDPDU(count): Number of valid Packe= ts received from this neighbor

          1-2<= u>

          ExtDLUint

          TxSuccessful (count):Count of successful unicast transmissions to= the neighbor

          1-2<= /span>

          ExtDLUint

          TxFailed (count): Number of unicast transmission, without=A0 gett= ing any ACK or NACK

          1-2<= /span>

          ExtDLUint

          TxCCA_Backoff (count): Number of unicast transmission aborted due= to CCA

          1-2<= /span>

          ExtDLUint

          TxNACK (count): Number of NACKs received<= /u>

          2

          Signed-16

          ClockSigma (level): A rough estimate of standard deviation of clo= ck corrections

          =A0

            • Per-channel report<= /b>

          In addition, in ISA100.11a, several performance metrics = are reported based on channel for all neighbors to the System Manager. Thes= e statistics are accumulated in the =93dlmo.ChannelDiag=94 attribute. This = report is similar to =93Device Health=94 report in WirelessHART.

          Byte

          =

          Format

          Description<= /u>

          0-2

          <= /td>

          Unsigned-16<= /u>

          Count (Number of attempted unicast t= ransmissions for all channels)

          3=

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 0 did not receive an ACK)

          4

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 0 aborted due to CCA)

          =85<= /span>

          =A0

          =A0

          33

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 15 did not receive an ACK)

          34

          Integer-8

          <= font face=3D"Calibri">(Percentage of time transmissions on cha= nnel 15 aborted due to CCA)

          =A0

          1. In ISA= 100.11a, each node sends a report, including a list of candidate (overheard= ) neighbors, to the System Manager to make a potential new routing decision= s. The =93dlmo.Candidates=94 attributed is used to store those information = in each node in the L2. This report is similar to the =93Neighbor Signal Le= vels=94 report in WirelessHART.

            Octets

            Format

            Description<= /u>

            1

            Unsigned-8

            N (count of discovered neighbors)

            0-2

            <= /td>

            ExtDlUint

            address

            0-1<= /span>

            Signed-8

            <= /span>

            0-1<= /span>

            Unsigned-8

            <= /span>

            =85<= /span>

            =A0

            =A0

            0-2<= /span>

            ExtDlUint

            <= font face=3D"Calibri">address

            0-1<= /span>

            Signed-8

            <= /span>

            0-1<= /span>

            Unsigned-8

            <= /span>

            =A0=

            =A0

            References

            1.=A0= =A0=A0=A0=A0=A0 IEC 62591: Industrial Communication Networks - Wireless Communicati= on Network and Communication Profiles - WirelessHART.<= u>

            =A0<= /font>

            2.=A0= =A0=A0=A0=A0=A0 IEC 62734: Industrial communication networks - Fieldbus specificati= ons - Wireless systems for industrial automation: process control and relat= ed applications - ISA100.11a.

            =A0<= /span>

            = =A0

            =A0<= /span>

            From: 6tsch-bounces@ietf.= org [mailto:6tsch-bounces@ietf.org] On Behalf = Of Thomas Watteyne
            Sent: Saturday, September 07= , 2013 7:43 PM
            To: Xavi V= ilajosana
            Cc: Pascal Thub= ert (pthubert); 6tsch@i= etf.org
            Subject: Re: [6tsch] report = flow contents

            =A0

            Xavi,

            Great, thanks!=

            Thomas

            =A0

            On Fri, Sep 6, 2013 at 5:01 PM, Xavier Vilajosana Guillen <xvilajosana@e= ecs.berkeley.edu> wrote:

            Hi,
            I created the scra= tchpad section in the wiki to keep ideas
            https://bitbucket.org/6tsch/m= eetings/wiki/Home


            and added the flow content information here.

            https://bitbucket.org/6tsch/meetings/wiki/report_flow_contents

            have a nice weekend!

            X

            =A0

            On Fri, Sep 6, 2013 at 10:43 AM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:=

            Hi Pascal, it is a good id= ea!

            I will collect that information= and as Thomas put it at the wiki so we do not lose it.

            :-)

            X

            = =A0

            On Fri, Sep 6, 2013 at 8:51= AM, Pascal Thubert (pthubert) <pthubert@cisco.com> wrote:

            Hello Xavi:

            =A0<= /span>

            = At the call I mentioned we could use info on tra= cks and cells as well, probably on demand from the PCE.

            For = instance, the PCE could observe energy levels over some cells for=A0 a whil= e to make sure they are clean.

            =A0<= /span>

            = What do you think?

            Pascal

            =A0

            From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana= Guillen
            Sent: vendredi 6 septembre 2= 013 01:17
            To: Thomas Watt= eyne
            Cc: 6tsch@ietf.org
            Subject: Re: [6tsch] report = flow contents

            =A0=

            agreed!

            So the fields become= :

            =A0

            =A0=

            For each known = neighbor:

            =A0-ID

            =A0-AVG RSSI in a running wind= ow

            =A0-Latest RSSI

            =A0-AVG LQI in a running= window [optional]

            =A0-Latest LQI [optional]<= /p>

            =A0-Num TX packets (option in = case there is communication with that neighbor)=

            =A0-Num ACK packets (option in= case there is communication with that neighbor)

            =A0-Num RX packets (option in = case there is communication with that neighbor)=

            =A0-Last ASN when it hear= t about that neighbor=A0

            =A0-Bundle: Num links in the Schedule to that nei= ghbor

            =A0 =A0 =A0 -PDR per link [Opt= ional -- or maybe best and worst PDR only]

            <= /div>

            =A0

            =A0-Option Flag (weather there are op= tional TLV fields on that category)

            =A0

            =A0-For each Queue:<= /font>

            =A0 =A0 - Avg Queue length in = a running window

            =A0 =A0 - Max Queue length in a running window (peak)

            =A0 =A0 - Current Queue length= (?)

            =A0 =A0 - ASN of the oldest packet in the QUEUE?=

            =A0 =A0 -Option Flag (wea= ther there are optional TLV fields on that category)

            =A0 =A0 =A0 =A0 +(TLV objects)= *=A0

            =A0

            -Time source parent

            = =A0 =A0 -ID

            =A0 =A0 -Avg clock drift (corr= ection done) in a running window

            =

            =A0 =A0 -Latest clock correction

            =A0 =A0 -Parent changes (count= er of how many times I changed my time source parent)<= u>

            =A0 =A0 -Option Flag (wea= ther there are optional TLV fields on that category)

            =A0 =A0 +(TLV objects)*=A0

            = =A0

            -Option Flag (weather th= ere are optional TLV fields in other categories)

            =A0 =A0+(TLV objects)*=A0

            =A0

            as regards to this:

            =A0

            "Finally, do you envision= a generic mechanism whereby the PCE can turn fields on/off, or triggered i= ndependently?"

            =A0

            I see it as CoAP Options, where a set of b= ytes can be used as "clever bitmap" to tell what options are ther= e, the parsing will decode option by option and will read the fields. In th= at way any combination of fields is supported.<= /p>

            =A0

            would that work?

            X=

            =A0

            On Thu, Sep 5, 2013 at 4:03 PM, Thomas Watteyne <watteyne@eecs.berkeley.edu= > wrote:

            Xavi,

            =A0

            Fantastic!

            =A0

            I believe PDR for each link might be too long to fit in a pac= ket. While the mote will most likely keep that information, we could move t= hat to the query flow, i.e. it is available to the PCE on-demand.=

            =A0

            Would you = agree that the number of links in a bundle belongs to the neighbor? Of mayb= e we want a "bundle" category?

            =A0

            In queuing= , it might be interesting to see the age of the different packets, to be ab= le to monitor latency.

            =A0

            About LQI,= there is no general consensus among vendors on what the definition is, or = how exactly it is calculated. I would make it optional.

            =A0

            Also, it m= ight be good to be able to add arbitrary fields to each category: neighbor,= queue, time source neighbor.

            =A0

            Finally, d= o you envision a generic mechanism whereby the PCE can turn fields on/off, = or triggered independently?

            <= span style=3D"font-size:12.0pt;color:#888888">=A0

            Thomas=

            =A0<= /u>

            On Thu, Sep 5, 2013 at 12:47 PM, Xavier Vilajo= sana Guillen <xvilajosana@eecs.berkeley.edu> wrote:<= /font>

            Hi Thomas, Diego,

            =A0=

            I agree that LQI should be there as well. I update here the l= ist with Thomas suggestions.=A0

            <= p>=A0

            For each known neigh= bor:

            =A0-ID

            =A0-AVG RSSI in a running wind= ow

            =A0-Latest RSSI

            =A0-AVG LQI in a running= window

            <= span style=3D"font-size:9.5pt;font-family:"Arial","sans-seri= f"">=A0-Latest LQI

            =A0-Num TX packets (option in = case there is communication with that neighbor)=

            =A0-Num ACK packets (option in= case there is communication with that neighbor)

            =A0-Num RX packets (option in = case there is communication with that neighbor)=

            =A0-Last ASN when it hear= t about that neighbor=A0

            =A0

            Other fields<= /u>

            =A0-Num links in= the Schedule to that neighbor

            =A0 =A0 -For each link PDR

            =A0-For each Queue:

            =A0 =A0 - Avg Queue length in a running window<= /span>

            =A0 =A0 - Max Queue length in a running wind= ow (peak)

            =A0 =A0 - Current Queue length (?)

            -Time source parent

            =A0 =A0 -ID

            =A0 = =A0 -Avg clock drift (correction done) in a running window

            =A0 =A0 -Latest clock correction<= /p>

            =A0 =A0 -Parent changes (counter of how many times I chang= ed my time source parent)

            =A0

            -Option Fl= ag (weather there are optional TLV fields)

            =A0 =A0+(TLV objects)*=A0

            =A0

            =A0

            Hope this = makes sense.

            cheers!
            Xavi

            =A0

            On Thu, Sep 5, 2013 at 11:41 AM, Thomas Watteyne <watteyne@eecs.berkeley.ed= u> wrote:

            [renamed = thread]

            =A0

            Xavi,<= /p>

            =A0<= /p>

            A few thoughts:=

            - the count= ers (numTx, etc) will only be present for neighbors the node has communicat= e with, so they should be optional in the packet.

            - you have focused on the top= ological information (which I think is the right one). It might be useful t= o gather other data related to synchronization or queuing.=

            - I couldn't agree more w= ith your suggestion to make it extensible. This does mean that we will need= to state somewhere that a device need to ignore silently fields it does no= t understand.

            =A0

            Thomas=

            =A0

            On Thu, Sep 5, 201= 3 at 11:15 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu> = wrote:

            Hello, I guess that flows are getting defined and I started to thin= k on the contents of the messages on that flows. Not sure if this is the ri= ght time or I am going way far..

            =A0

            According to the pr= evious discussion I assume that the five flows are:

            =A0

            ME-6TOP - = Query Flow

            ME-6TOP - Action Flow

            =A0

            6TOP - ME - Report Flow

            =

            6TOP - ME - Event Flow

            6TOP - ME - Request BW Flow

            =A0

            I'd like to start defining the content of the messages in= the Report Flow:

            =A0=

            The Report Flow: has to deal with the information that a node= knows and has to be sent to the ME so the ME can compute the schedule amon= g others. Here I list =A0the information that we can know in a mote and can= be used at the ME to compute the schedule (complete please if I miss somet= hing)

            =A0

            For each k= nown neighbor:

            =A0-ID

            =A0-AVG R= SSI in a running window

            =A0-Latest RSSI

            = = =A0-Num TX packets

            =A0-Num ACK packets

            =A0-Num RX packets

            =A0-Last ASN when it heart about that neighbor=A0

            =A0

            Other fields

            =A0= -Num links in the Schedule to that neighbor

            =A0 =A0 -For each link PDR

            =A0

            =A0

            Then we ne= ed to have some TLV like objects that can be used for ad-hoc/naive/other ex= tensions of the reporting process. In that way we don't constraint the = implementation of the scheduling alg. to that information.

            =A0

            = = what do you think?

            X

            =A0

            On Fri, Aug 30, 2013 at 10:45 AM, Qin Wang <qinwang@berkeley.edu>= ; wrote:

            Hi all,

            =A0

            In this thread, we will continue t= he discussion about Confirmation message. Here is some background informati= on.

            =A0

            Context: e.g.<= /font>

            =A0 =A0 - node sends a report and want to know if the report is accepted= .,=A0

            =A0 =A0 - ME sends a action request= and want to know if/when the action taken.

            Options:

            =A0 =A0(1) Nothing

            =A0 =A0(2) Rely on transport mechanism (e.g. confirmable CoAP message)

            = =A0 =A0(3) App-level ACK type

            =A0 =A0(4) Use different flow (i.e. action flow)=

            =A0

            IMHO, different control flow may have different requirement for confirma= tion message.

            =A0 =A0 (1) Action Flow, ne= eds a App-level confirmation, like Succ/Fail

            =A0 =A0 (2) Query Flow, automatically has the confirmation, i.e. the mes= sage packet corresponding to a specific query.<= /p>

            =A0= =A0 (3) Report Flow and Event Flow, option (1)-(3) are OK, but I prefer op= tion (1) and (3), i.e. the confirmation message is an option, but if a conf= irmation message is needed, it should be App-level Ack, instead of transpor= t layer confirmation, which will give 6top more flexibility.<= u>

            =A0

            What do you think?

            =A0

            Thanks<= u>

            Qin

            =A0 =A0=A0

            =A0

            _______________________________________________
            6tsch mailing list
            6= tsch@ietf.org
            https://www.ietf.org/mailman/listinfo/6tsch<= u>

            =A0


            _______________________________________________
            6tsch mailing list
            6tsch@ietf.org
            http= s://www.ietf.org/mailman/listinfo/6tsch

            =A0


            _______________________________________________
            6tsch mailing list
            6tsch@ietf.org
            http= s://www.ietf.org/mailman/listinfo/6tsch

            =A0

            =A0<= u>


            _________________= ______________________________
            6tsch mailing list
            6tsch@ietf.org
            h= ttps://www.ietf.org/mailman/listinfo/6tsch            <= /p>

            =A0

            =A0=

            =A0

            =A0

<= /div>

=A0


_____= __________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch<= /p>

<= span style=3D"font-size:12.0pt">=A0



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch



_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


<= br clear=3D"all">
--
DIEGO DUJOVNE
Acad=E9mico Escuela de Ingenie= r=EDa en Inform=E1tica y Telecomunicaciones
Facultad de Ingenier=EDa UDP=
www.ingenier= ia.udp.cl
(56 2) 676 8125

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mail-ie0-f174.google.com (mail-ie0-f174.google.com [209.85.223.174]) by ietfa.amsl.com (Postfix) with ESMTP id B674921E8055 for <6tsch@ietf.org>; Fri, 13 Sep 2013 08:04:15 -0700 (PDT) Received: by mail-ie0-f174.google.com with SMTP id u16so2753450iet.33 for <6tsch@ietf.org>; Fri, 13 Sep 2013 08:04:14 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=q+TdwJbYO3AE+kKoQTnWkX6QvFmvpvDgtP+Wuayheuw=; b=TzJAP6h47Ani1tpVudzko7UHcymL8AVh+9yRcPM5nnQ1W5uM/JsyiMaoe9k/lm8wE6 rGKXVXPofTCpKSexfXRzwXu8QFtGWwfv9cbXvCrPah9wJGpLmu/Rp9yPFzoyNU27NgK5 8L32UozpwqoQWIW9DHf5vXwJoPWsm1Y65wboCXBJ/vQb0xcqLrbxuZWQMk302/VjAH0O aV09yJu/0D9qNWqDAI8fg7ok/VTbbgeGvQlFzde4DxYB+cTMwBaRqKMEO3rycDMQyGDd K0yDPD34/z08IHZOQe84/QH88ytVkE1oLD51Tuk0in+gCqUMf+1tR3/GmdTe11Ob4LMt htXw== X-Gm-Message-State: ALoCoQk94XX4E8Y/NZZqMt8pS80Q7EoNzhpB31SsTAe23Trn27NNkxD2TFR+A+ptBt+r5au0Tt/s MIME-Version: 1.0 X-Received: by 10.50.61.137 with SMTP id p9mr1495145igr.45.1379084654831; Fri, 13 Sep 2013 08:04:14 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Fri, 13 Sep 2013 08:04:14 -0700 (PDT) In-Reply-To: References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> Date: Fri, 13 Sep 2013 23:04:14 +0800 Message-ID: From: Qin Wang To: Thomas Watteyne Content-Type: multipart/alternative; boundary=047d7bdca5dcf7942404e6452a25 Cc: 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 15:04:20 -0000 --047d7bdca5dcf7942404e6452a25 Content-Type: text/plain; charset=ISO-8859-1 Thomas, I agree with you that it is not clear what is the advantage and disadvantage of adaptive channel hopping in reality. In mind, based on the per-frequency report, PCE can do two things: (1) update channel hopping sequence is a frequency is really bad network wide; (2) avoid use some bad channel when it runs cell allocation algorithm. The two things happen in PCE, so, will not make negative impact on the network. Thought? Thanks Qin On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne < watteyne@eecs.berkeley.edu> wrote: > Qin, Diego, > > My 2 cents. I agree with you that it would be nice for the PCE to be able > to get some per-channel information. Although adaptive channel hopping > (i.e. selectively blacklisting frequencies for a specific bundle) is > appealing in principle, it's unclear (at least to me) whether the gains > clearly outweigh the overhead (complexity, signalign traffic) one has to > pay to coordinate this [1-5]. > > My opinion is that we should enable both metrics averages over all > channels, and per-channel metrics. In some configurations, one can imagine > gathering the former by default, and querying for the latter on specific > occasions. Having the option of gathering per-channel information does > enable us to be future-proof against future adaptive channel hopping > algorithm. > > For sure, this makes for a great question: how do a pair of motes and the > PCE have to communicate to enable adaptive channel hopping on that link? > The answer to that might directly impact the application payload formats we > have are talking about. Is this something you be interested in looking > further into? > > Thomas > > [1] A Decentralized Scheduling Algorithm for Time Synchronized Channel > Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Alexandre M. Bayen. > ICST Transactions on Mobile Communications and Applications, 11(7-9). > European Union Digital Library link. doi:10.4108/icst.trans.mca.2011.e5. > September 2011. > [2] A Decentralized Scheduling Algorithm for Time Synchronized Channel > Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister. International > Conference on Ad Hoc Networks (ADHOCNETS), Victoria, BC, Canada, 18-20 > August 2010. > [3] Mitigating Multipath Fading Through Channel Hopping in Wireless Sensor > Networks. Thomas Watteyne, Steven Lanzisera, Ankur Mehta, Kris Pister. IEEE > International Conference on Communications (ICC), Cape Town, South Africa, > 23-27 May, 2010. > [4] Feasibility Analysis of Controller Design for Adaptive Channel > Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven Glaser, > Kris Pister. First International Workshop on Performance Methodologies and > Tools for Wireless Sensor Networks (WSNPerf), Pisa, Italy, 23 October 2009. > [5] Reliability Through Frequency Diversity: Why Channel Hopping Makes > Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM International > Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor, and > Ubiquitous Networks (PE-WASUN), Tenerife, Canary Islands, Spain, 26-30 > October 2009. > > On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne < > diego.dujovne@mail.udp.cl> wrote: > >> Hello Qin, >> I think that a per-frequency report will help the PCE >> to decide which frequency to use, and maybe temporarily >> black-list them. For example, a dynamic scheme may include >> sampling the blacklisted frequencies every X minutes to re-enable >> them once the interference has disappeared. >> This will require the node to refresh the RSSI >> and LQI values in a opportunistic way (every time the a cell >> uses that frequency) to save energy. >> >> Any thoughts? >> >> Diego >> > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --047d7bdca5dcf7942404e6452a25 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Thomas,

I agree with you that it is not= clear what is the advantage and disadvantage of adaptive channel hopping i= n reality.

In mind, based on the per-frequency rep= ort, PCE can do two things: (1) update channel hopping sequence is a freque= ncy is really bad network wide; (2) avoid use some bad channel when it runs= cell allocation algorithm. =A0The two things happen in PCE, so, will not m= ake negative impact on the network. Thought?

Thanks

Qin

=A0=A0


On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne <wat= teyne@eecs.berkeley.edu> wrote:
Qin, Diego,

<= div>My 2 cents. I agree with you that it would be nice for the PCE to be ab= le to get some per-channel information. Although adaptive channel hopping (= i.e. selectively blacklisting frequencies for a specific bundle) is appeali= ng in principle, it's unclear (at least to me) whether the gains clearl= y outweigh the overhead (complexity, signalign traffic) one has to pay to c= oordinate this [1-5].

My opinion is that we should enable both metrics averag= es over all channels, and per-channel metrics. In some configurations, one = can imagine gathering the former by default, and querying for the latter on= specific occasions. Having the option of gathering per-channel information= does enable us to be future-proof against future adaptive channel hopping = algorithm.

For sure, this makes for a great question: how do a pai= r of motes and the PCE have to communicate to enable adaptive channel hoppi= ng on that link? The answer to that might directly impact the application p= ayload formats we have are talking about. Is this something you be interest= ed in looking further into?

Thomas

[1] A Decentralized Scheduling Algorithm for Time S= ynchronized Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Al= exandre M. Bayen. ICST Transactions on Mobile Communications and Applicatio= ns, 11(7-9). European Union Digital Library link. doi:10.4108/icst.trans.mc= a.2011.e5. September 2011.
[2] A Decentralized Scheduling Algorithm for Time Synchronized Channel Hopp= ing. Andrew Tinka, Thomas Watteyne, Kris Pister. International Conference o= n Ad Hoc Networks (ADHOCNETS), Victoria, BC, Canada, 18-20 August 2010.
[3] Mitigating Multipath Fading Through Ch= annel Hopping in Wireless Sensor Networks. Thomas Watteyne, Steven Lanziser= a, Ankur Mehta, Kris Pister. IEEE International Conference on Communication= s (ICC), Cape Town, South Africa, 23-27 May, 2010.
[4] Feasibility Analysis of Controller Design fo= r Adaptive Channel Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco= , Steven Glaser, Kris Pister. First International Workshop on Performance M= ethodologies and Tools for Wireless Sensor Networks (WSNPerf), Pisa, Italy,= 23 October 2009.
[5] Reliability Through Frequency Diversity: Why= Channel Hopping Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Si= xth ACM International Symposium on Performance Evaluation of Wireless Ad Ho= c, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife, Canary Islands, Sp= ain, 26-30 October 2009.

On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego= Dujovne <diego.dujovne@mail.udp.cl> wrote:
Hello Qin,
=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0 I think that a per-frequency report will help the PCE=
to decide which frequency to use, and maybe temporarily
black-= list them. For example, a dynamic scheme may include
sampling the blacklisted frequencies every X minutes to re-enable
= them once the interference has disappeared.
=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0 This will require the node to refresh the RSSI
and LQI values in a opportunistic way (every time the a cell
uses that frequency) to save energy.
=A0 =A0 =A0 = =A0 =A0 =A0=A0
Any thoughts?

=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Diego=

_______________________________________________
6tsch mailing list
6tsch@ietf.org
h= ttps://www.ietf.org/mailman/listinfo/6tsch


--047d7bdca5dcf7942404e6452a25-- From diego.dujovne@mail.udp.cl Fri Sep 13 08:28:47 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 37BB421F9C76 for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 08:28:47 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.977 X-Spam-Level: X-Spam-Status: No, score=-2.977 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id y6EuBOllyfDk for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 08:28:43 -0700 (PDT) Received: from mail-wg0-f51.google.com (mail-wg0-f51.google.com [74.125.82.51]) by ietfa.amsl.com (Postfix) with ESMTP id C6BE221F9BF1 for <6tsch@ietf.org>; Fri, 13 Sep 2013 08:28:42 -0700 (PDT) Received: by mail-wg0-f51.google.com with SMTP id c11so1273725wgh.18 for <6tsch@ietf.org>; Fri, 13 Sep 2013 08:28:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=0jBVF2G/OI2ox7fkVgtUZlvhJav7Qkherwpwb0snxD8=; b=CVDiDcA4XtN3C9oOWEDZx3pugVC9Au2ckibTVL6mlM56nsTkXBpPbLUpBegKUcnRey /8wUnIiKCy3vXhpA+wMLLOEijng1DO5/NyByugrqbBHlUJ5qD6wK33GeCEcgHojVD3QC yLg+mTejw0bpzbQ/azf5dodA0KRieN3gQtVTetZbZRMgkCImIDNCigwh6eVsiR3KSaOu wmknM4KcAHhew1G8EhNaG4Rg0mizrszo0fqvybk9FFtXzkTSc+APizPoh/TEjUNgoG0v cXVmckuGhOO4htDsPr42ZoL5oNQG771y+oFvHwZS8NSOXaww55RegMlPWYe1ya59muDI qwAA== X-Gm-Message-State: ALoCoQmGh1A7j4ifRkQ8b6sf/2kedoBCWhq10uHhyQRdQcuynPoG1y5yIgMBXQY0nbIyjZ9hxfdA MIME-Version: 1.0 X-Received: by 10.180.206.42 with SMTP id ll10mr3067433wic.50.1379086114731; Fri, 13 Sep 2013 08:28:34 -0700 (PDT) Received: by 10.194.122.103 with HTTP; Fri, 13 Sep 2013 08:28:34 -0700 (PDT) In-Reply-To: References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> Date: Fri, 13 Sep 2013 12:28:34 -0300 Message-ID: From: "Prof. Diego Dujovne" To: Qin Wang Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: Thomas Watteyne , 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 15:28:47 -0000 Qin, I think frequency blacklisting on a node-pair basis (either centralized or distributed) would break the schedule matrix structure, which overrides narrowband interference by channel hopping. If frequencies are blacklisted on all slots, that would waste resources. Narrowband interference can harm the link locally, but the same frequency may be interference-free in other parts of the net. The dynamic allocation I propose was only an example. If you have 16 frequencies and 2 of them have interference, and the channel offset is sequential, you may loose 2 packets every 16. Am I right on this? Thoughts? Diego 2013/9/13 Qin Wang : > Thomas, > > I agree with you that it is not clear what is the advantage and disadvant= age > of adaptive channel hopping in reality. > > In mind, based on the per-frequency report, PCE can do two things: (1) > update channel hopping sequence is a frequency is really bad network wide= ; > (2) avoid use some bad channel when it runs cell allocation algorithm. T= he > two things happen in PCE, so, will not make negative impact on the networ= k. > Thought? > > Thanks > > Qin > > > > > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne > wrote: >> >> Qin, Diego, >> >> My 2 cents. I agree with you that it would be nice for the PCE to be abl= e >> to get some per-channel information. Although adaptive channel hopping (= i.e. >> selectively blacklisting frequencies for a specific bundle) is appealing= in >> principle, it's unclear (at least to me) whether the gains clearly outwe= igh >> the overhead (complexity, signalign traffic) one has to pay to coordinat= e >> this [1-5]. >> >> My opinion is that we should enable both metrics averages over all >> channels, and per-channel metrics. In some configurations, one can imagi= ne >> gathering the former by default, and querying for the latter on specific >> occasions. Having the option of gathering per-channel information does >> enable us to be future-proof against future adaptive channel hopping >> algorithm. >> >> For sure, this makes for a great question: how do a pair of motes and th= e >> PCE have to communicate to enable adaptive channel hopping on that link?= The >> answer to that might directly impact the application payload formats we = have >> are talking about. Is this something you be interested in looking furthe= r >> into? >> >> Thomas >> >> [1] A Decentralized Scheduling Algorithm for Time Synchronized Channel >> Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Alexandre M. Bayen. >> ICST Transactions on Mobile Communications and Applications, 11(7-9). >> European Union Digital Library link. doi:10.4108/icst.trans.mca.2011.e5. >> September 2011. >> [2] A Decentralized Scheduling Algorithm for Time Synchronized Channel >> Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister. International >> Conference on Ad Hoc Networks (ADHOCNETS), Victoria, BC, Canada, 18-20 >> August 2010. >> [3] Mitigating Multipath Fading Through Channel Hopping in Wireless Sens= or >> Networks. Thomas Watteyne, Steven Lanzisera, Ankur Mehta, Kris Pister. I= EEE >> International Conference on Communications (ICC), Cape Town, South Afric= a, >> 23-27 May, 2010. >> [4] Feasibility Analysis of Controller Design for Adaptive Channel >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven Glaser, >> Kris Pister. First International Workshop on Performance Methodologies a= nd >> Tools for Wireless Sensor Networks (WSNPerf), Pisa, Italy, 23 October 20= 09. >> [5] Reliability Through Frequency Diversity: Why Channel Hopping Makes >> Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM Internationa= l >> Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor, and >> Ubiquitous Networks (PE-WASUN), Tenerife, Canary Islands, Spain, 26-30 >> October 2009. >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne >> wrote: >>> >>> Hello Qin, >>> I think that a per-frequency report will help the PCE >>> to decide which frequency to use, and maybe temporarily >>> black-list them. For example, a dynamic scheme may include >>> sampling the blacklisted frequencies every X minutes to re-enable >>> them once the interference has disappeared. >>> This will require the node to refresh the RSSI >>> and LQI values in a opportunistic way (every time the a cell >>> uses that frequency) to save energy. >>> >>> Any thoughts? >>> >>> Diego >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > --=20 DIEGO DUJOVNE Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl (56 2) 676 8125 From P.Zand@utwente.nl Fri Sep 13 09:46:58 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D756121E8104 for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 09:46:58 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.796 X-Spam-Level: X-Spam-Status: No, score=0.796 tagged_above=-999 required=5 tests=[AWL=1.300, BAYES_00=-2.599, HELO_EQ_NL=0.55, HOST_EQ_NL=1.545] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 4SDD0v7xpdhk for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 09:46:54 -0700 (PDT) Received: from EXEDGE01.ad.utwente.nl (exedge01.ad.utwente.nl [130.89.5.48]) by ietfa.amsl.com (Postfix) with ESMTP id AA24C21E80F0 for <6tsch@ietf.org>; Fri, 13 Sep 2013 09:46:27 -0700 (PDT) Received: from EXHUB02.ad.utwente.nl (130.89.4.229) by EXEDGE01.ad.utwente.nl (130.89.5.48) with Microsoft SMTP Server (TLS) id 14.2.328.9; Fri, 13 Sep 2013 18:46:14 +0200 Received: from EXMBX23.ad.utwente.nl ([169.254.3.13]) by EXHUB02.ad.utwente.nl ([130.89.4.229]) with mapi id 14.02.0328.009; Fri, 13 Sep 2013 18:45:37 +0200 From: To: , Thread-Topic: [6tsch] report flow contents Thread-Index: AQHOqmeRdn+u8+L3JUGYWl1pnrYuVpm3azMAgAA2pACAAAP1gIABFasAgAAfWwCAAGmlgIABKJyAgAYvvkCAAA0/AIAAIEEAgAA8AMCAALlWkIABAAeAgADZmoCAAAnjAIAABn2AgAAFBgCAAAbNAIAANrEg Date: Fri, 13 Sep 2013 16:45:36 +0000 Message-ID: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7C9AE@EXMBX23.ad.utwente.nl> References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [130.89.12.149] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Cc: watteyne@eecs.berkeley.edu, 6tsch@ietf.org Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 16:46:59 -0000 Dear All, Regarding to the Xavi's report list, I found "per-cell" reports for each no= de (in addition to potential "per-frequency" and "per-neighbor" reports) in= the list. I have the following concerns,=20 (1) In the centralized management approach, what is the gain of reporting t= he statistics "per-cell"? Per-cell information will be used to evaluate the= potential internal-interference caused by other neighboring communication.= Am I right? Shouldn't the PCE, take care of allocation of cells (either de= dicated or shared cells)? I mean, shouldn't the PCE take care of not alloca= ting (re-using) the dedicated cell to two different pairs? Shouldn't the PC= E take care of allocating the shared cell to the limited number of transmit= ters?=20 (2) For sure, in the "per-frequency" and "per-neighbor" reports, each node = has a limited number of frequencies (i.e. 11-26 in 2.4GHz) and a maximum nu= mber of linked-neighbors to report. However, in reporting "per-cell", what = is the maximum number of cells defined for a node? (We might also consider = the dense traffic scenarios). Am I missing anything? Best Wishes, Pouria =20 -----Original Message----- From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of P= rof. Diego Dujovne Sent: Friday, September 13, 2013 5:29 PM To: Qin Wang Cc: Thomas Watteyne; 6TSCH Subject: Re: [6tsch] report flow contents Qin, I think frequency blacklisting on a node-pair basis (either centraliz= ed or distributed) would break the schedule matrix structure, which overrid= es narrowband interference by channel hopping. If frequencies are blacklisted on all slots, that would waste resources. Na= rrowband interference can harm the link locally, but the same frequency may= be interference-free in other parts of the net. The dynamic allocation I propose was only an example. If you have 16 = frequencies and 2 of them have interference, and the channel offset is sequ= ential, you may loose 2 packets every 16. Am I right on this? Thoughts? Diego 2013/9/13 Qin Wang : > Thomas, > > I agree with you that it is not clear what is the advantage and=20 > disadvantage of adaptive channel hopping in reality. > > In mind, based on the per-frequency report, PCE can do two things: (1)=20 > update channel hopping sequence is a frequency is really bad network=20 > wide; > (2) avoid use some bad channel when it runs cell allocation algorithm. =20 > The two things happen in PCE, so, will not make negative impact on the ne= twork. > Thought? > > Thanks > > Qin > > > > > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne=20 > wrote: >> >> Qin, Diego, >> >> My 2 cents. I agree with you that it would be nice for the PCE to be=20 >> able to get some per-channel information. Although adaptive channel hopp= ing (i.e. >> selectively blacklisting frequencies for a specific bundle) is=20 >> appealing in principle, it's unclear (at least to me) whether the=20 >> gains clearly outweigh the overhead (complexity, signalign traffic)=20 >> one has to pay to coordinate this [1-5]. >> >> My opinion is that we should enable both metrics averages over all=20 >> channels, and per-channel metrics. In some configurations, one can=20 >> imagine gathering the former by default, and querying for the latter=20 >> on specific occasions. Having the option of gathering per-channel=20 >> information does enable us to be future-proof against future adaptive=20 >> channel hopping algorithm. >> >> For sure, this makes for a great question: how do a pair of motes and=20 >> the PCE have to communicate to enable adaptive channel hopping on=20 >> that link? The answer to that might directly impact the application=20 >> payload formats we have are talking about. Is this something you be=20 >> interested in looking further into? >> >> Thomas >> >> [1] A Decentralized Scheduling Algorithm for Time Synchronized=20 >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Alexandre M= . Bayen. >> ICST Transactions on Mobile Communications and Applications, 11(7-9). >> European Union Digital Library link. doi:10.4108/icst.trans.mca.2011.e5. >> September 2011. >> [2] A Decentralized Scheduling Algorithm for Time Synchronized=20 >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister.=20 >> International Conference on Ad Hoc Networks (ADHOCNETS), Victoria,=20 >> BC, Canada, 18-20 August 2010. >> [3] Mitigating Multipath Fading Through Channel Hopping in Wireless=20 >> Sensor Networks. Thomas Watteyne, Steven Lanzisera, Ankur Mehta, Kris=20 >> Pister. IEEE International Conference on Communications (ICC), Cape=20 >> Town, South Africa, >> 23-27 May, 2010. >> [4] Feasibility Analysis of Controller Design for Adaptive Channel=20 >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven=20 >> Glaser, Kris Pister. First International Workshop on Performance=20 >> Methodologies and Tools for Wireless Sensor Networks (WSNPerf), Pisa, It= aly, 23 October 2009. >> [5] Reliability Through Frequency Diversity: Why Channel Hopping=20 >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM=20 >> International Symposium on Performance Evaluation of Wireless Ad Hoc,=20 >> Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife, Canary Islands,=20 >> Spain, 26-30 October 2009. >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne=20 >> wrote: >>> >>> Hello Qin, >>> I think that a per-frequency report will help the PCE=20 >>> to decide which frequency to use, and maybe temporarily black-list=20 >>> them. For example, a dynamic scheme may include sampling the=20 >>> blacklisted frequencies every X minutes to re-enable them once the=20 >>> interference has disappeared. >>> This will require the node to refresh the RSSI and LQI=20 >>> values in a opportunistic way (every time the a cell uses that=20 >>> frequency) to save energy. >>> >>> Any thoughts? >>> >>> Diego >> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > -- DIEGO DUJOVNE Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones F= acultad de Ingenier=EDa UDP www.ingenieria.udp.cl (56 2) 676 8125 _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch From twatteyne@gmail.com Fri Sep 13 10:25:46 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9DF9E21F9FFF for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 10:25:46 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.387 X-Spam-Level: X-Spam-Status: No, score=-1.387 tagged_above=-999 required=5 tests=[AWL=0.590, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sXkPTxLV5nB2 for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 10:25:45 -0700 (PDT) Received: from mail-pa0-x22c.google.com (mail-pa0-x22c.google.com [IPv6:2607:f8b0:400e:c03::22c]) by ietfa.amsl.com (Postfix) with ESMTP id 1296A11E812F for <6tsch@ietf.org>; Fri, 13 Sep 2013 10:25:45 -0700 (PDT) Received: by mail-pa0-f44.google.com with SMTP id fz6so2797317pac.31 for <6tsch@ietf.org>; Fri, 13 Sep 2013 10:25:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=J+fYr1ZKci2V6A8aTlaJYdpMkerUXGic1hMiqLjZPlw=; b=JT/zh4bnlRhQGd3o+XSfPBn6uMYsxSwC6g9kbF6v95caWwvsD9bGvXj9t1k/FqRwXC QN7I4Em10ZAl/i9KSThjTRb4PWbUliJwd6074/ZV4fTjhcEq1cP9g5GcExggF3M2nXIR np4v00hpjF1xqS6WwyFL/fe6vpWWS+H0rPKUGBc+nLMrBv0BSKYqzrtrJsbBLpE+jJjC +ncrs0/5oLL9bHTDHAIINDWqN1Afz/YzKMPM3PPM2ka9uAsIDXs/Gx3Vt8uQcACFVAnC 5rUmj8g6gQyUjY/BKtwBtXePVebM6v7i7iCUntMOjVIYwOJ+omenM4asD3OMn23ThIXv ZHNA== X-Received: by 10.66.248.161 with SMTP id yn1mr16891944pac.0.1379093144731; Fri, 13 Sep 2013 10:25:44 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Fri, 13 Sep 2013 10:25:24 -0700 (PDT) From: Thomas Watteyne Date: Fri, 13 Sep 2013 10:25:24 -0700 X-Google-Sender-Auth: _-jE3DJ2bbtOpz9GN8NGk7Q1nVY Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b15b04301071004e64725c1 Subject: [6tsch] minutes webex 13 September 2013 X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 17:25:46 -0000 --047d7b15b04301071004e64725c1 Content-Type: text/plain; charset=ISO-8859-1 All, You will find the minutes of today's webex below. FYI, all the minutes and slides are archived a https://bitbucket.org/6tsch/meetings/. Thanks to Xavi and Dominique for taking notes! As usual, fix anything we might have missed directly in the e-mail and reply. We will approve and adopt the minutes at the next call. Thomas --- Minutes Webex 13 September 2013, 6TiSCH group Note: timestamps in PDT. Taking notes *(using Etherpad)* 1. Xavi Vilajosana 2. Dominique Barthel 3. Thomas Watteyne Present *(alphabetically)* 1. Thomas Watteyne 2. Pascal Thubert 3. Alaeddine Weslati 4. Cedric Adjih 5. Diego Dujovne 6. Dominique Barthel 7. Geraldine Texier 8. Maria Rita Palattella 9. Pouria Zand 10. Qin Wang 11. Raghuram Sudhaakar 12. Tom Phinney 13. Xavi Vilajosana Recording - Webex recording (audio+slides,streaming) - https://cisco.webex.com/ciscosales/lsr.php?AT=pb&SP=MC&rID=71384822&rKey=95f5ec34911eadf4 *[63min]* Slides - slides_130913_webex.ppt: slides shared during the call Action Items - *Xavi* to send to ML (1) the list criteria currently defined on CoAP observe pattern and (2) whether it is possible to extend this list. - *Thomas* to send list of CoAP elements that can be used in 6TiSCH to ML. - *Thomas* to confirm rough consensus about "Can CoAP be used to transport 6TiSCH signaling traffic" on ML. - *Thomas* to confirm rough consensus on "RPL OF0 parameters" on ML. - *Pouria* to present WirelessHART and and ISA100.11a equivalent formats for "report flow" at next week's call. Agenda - Administrivia *[3min]* - Approval agenda - Approval minutes last call - Chartering process *[15min]* - Updates to charter text - latest version - diff (click "Side-by-side diff") - "On the Difference between Information Models and Data Models" (RFC3444) - Process - Dashboard - Ballot - CoAP *[30min]* - presentation *[Raghuram,Xavi]* - discussion - Rank rounding error, churn and hysteresis *[10min]* - Context and overview discussion *[Pascal,Qin,Xavi]* - discussion on hysteresis RFC6719 - AOB *[2min]* Minutes - *[08.05]* Meeting starts - *[08.07]* Administrivia - Approval minutes last call No issues raised. Minutes approved. - Approval agenda No issues raised. Agenda approved. - *[08.08]* Chartering process - Review process: - Dashboard - Ballot - History - Great feedback during "Internal Review" state. - Some back-and-forth between members of IESG and Pascal/Thomas. Triggered some rewording of the charter (see below). - State changed to *External review* from Internal review. - Updates to charter text - latest version on BitBucket - diff on BitBucket (click "Sid-by-side diff") - official charter versions - Re-ordered work items: 1. "6TiSCH architecture" 2. Information Model 3. "Minimal 6TiSCH Configuration" - Changes to scope: - work item 2 now includes a mapping of the information model to a data model (e.g. CoAP/CBOR) - Clarifications: - About the use of RPL in the minimal draft: we are not changing RPL at all. Using RPL and OF0 in minimal draft. - "On the Difference between Information Models and Data Models" (RFC3444) - This RFC highlights the difference between Informational Model (e.g UML diagrams) and Data Model (How data is represented and managed, e.g. CBOR) - *[08.13]* CoAP *[30min]* - presentation - CoAP overview: *[Raghuram]* - Carsten is one of the authors of CoAP. - Can be described a "HTTP for Low Power Lossy devices" - Analogous to HTTP. Follows REST architecture. - CoAP brings the REST features to the LLN domain. - Designed for minimal payload size. - Includes options relevant to the LLN domain. - On top of UDP. - Defines messaging architecture. - Defines request/response formats. - Supports identification of resources through URIs. - Publish/subscribe features (different from HTTP) - 4 types of messages: - CON: confirmable (reliable) - NON: non-confirmable (unreliable) - ACK: acknowledgement - RST: reset - With CoAP, we can achieve reliable content delivery/request - Two identifiers: - Message ID: match messages of type Acknowledgement/Reset to messages of type Confirmable/Non-confirmable - Token: used to correlate requests and responses - These two identifiers allow different models: - piggy-backing, where response is payload of ACK - asynchronous, where response comes on its own, possibly after the ACK. - 4 Basic Methods: GET/PUT/POST/DELETE - Multiple Respsnse categories (similar to HTTP): - 2xx - 4xx - 5xx - Options and URIS. - Identification of resources - Representation of the resource - Content-format: defines the type of the content, e.g, text, uint16, etc. - Conditional options. - matching options to identify specific resources - age for caching, etc. - URI Scheme: - Options are the containers of the parameters (uri). - Notion of URI in http. - Size of names in the URI affect size of options so this is recommended to be minimal. - Does not define the max size of the payload. recommend to have it smaller than PDU. - CoAP other topics: - Security using DTLS - DICE - Service Discovery - Proxying - reverse proxies/ relay proxies. - Caching - Max age - Observe feature in CoAP: *[Xavi]* - The purpose is to stay aware of the updates of the state of the resource. Don't want to actively poll all the time. - Interested node registers to a resource, and will be pushed data from the server. - The observer sends a GET request to the server. The server responds with the current state of resource, and adds the client to the list of observers. - "Observe" is an option of the GET method and response. - In the response, the "Observe" option identifies the notification with a 24-bit integer value. - This value increments between notifications, and is used to order the data received. - The observe option does not have anything to do with the query that is done. So it seems that the GET can contain Content-Match fields to make it conditional. That is, if observe header is there, then this will be notified upon server side changes on the resource (applying condition). - *[Dominique]* How can a client know that the server is able to add the client to the list of listeners? - draft-core-observe states: The Observe Option is not critical for processing the request. If the server is unwilling or unable to add the client to the list of observers of the target resource, then the request falls back to a normal GET request. - *[Qin]* What kind of criteria can be used in the observe pattern? That is, can the client somehow specify "exotic" criterie (e.g. "send this metric when I have only one routing parent") design the criteria to get a notification? Action item: *Xavi* to send to ML (1) the list criteria currently defined on CoAP observe pattern and (2) whether it is possible to extend this list. - discussion > Action item: *Thomas* to send list of CoAP elements that can be used in 6TiSCH to ML. - Next step: continue with CoAP payload discussion. CBOR?? - Call for rough consensus on using CoAP in 6TiSCH: No issue raised. Rough consensus on the call. Action item: *Thomas* to confirm rough consensus on "CoAP can be used to transport 6TiSCH signalling traffic" on ML. - *[08.55]* Rank rounding error, churn and hysteresis - Context and overview discussion - RPL has a mechanism for loop avoidance. - RPL OF0 - rank is a 2 byte value. - Several factors are used to compute the OF0. - minHopRankIncrease -> makes integer part be a monotonically increasing byte - DAGRank(rank) is a function indicative of the rank of a node. - How do we propose changes/hints to the computation of the ETX. - Call for rough consensus on use OF0 as described in http://www.ietf.org/mail-archive/web/6tsch/current/msg01247.html. No issue raised. Rough consensus on the call. Action item: *Thomas* to confirm rough consensus on "RPL OF0 parameters" on ML. - discussion on hysteresis - RFC6719 Running out of time. Moved to next week's call. - *[09.09]* AOB - Presenting WirelessHART and and ISA100.11a equivalent formats next call? Action item: *Pouria* to present WirelessHART and and ISA100.11a equivalent formats for "report flow" at next week's call. - Any other business? No other business raised. - *[09.08]* Meeting ends --047d7b15b04301071004e64725c1 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
All,

You will find the minut= es of today's webex below.

FYI, all the minute= s and slides are archived a https://bitbucket.org/6tsch/meetings/.

Thanks to Xavi and Dominique for taking notes!

As usual, fix anything we might have missed directly in th= e e-mail and reply. We will approve and adopt the minutes at the next call.=

Thomas

---

Minutes Webex 13 September 2013, 6TiSCH group

Note: timestamps in PDT.

Taking notes=A0(using Etherpad)

  1. Xavi Vilajos= ana
  2. Domi= nique Barthel
  3. Thomas Watteyne

Pres= ent=A0(alphabetically)

  1. Thomas Watteyne
  2. Pascal Thubert
  3. Alaeddine Weslati
  4. Cedric Adjih
  5. Diego Dujovne
  6. Dominique Barthel
  7. Geraldine Texier
  8. Maria Rita Palattella
  9. Pouria Zand
  10. Qin Wang
  11. Raghuram Sudhaakar
  12. Tom Phinney
  13. Xavi Vilajosana

Recording

Slides

Action Items

  • Xavi=A0to sen= d to ML (1) the list criteria currently defined on CoAP observe pattern and= (2) whether it is possible to extend this list.
  • Thom= as=A0to send list of CoAP elements that can be used in 6TiSCH to M= L.
  • Thomas=A0to confirm rough consensus about "Can CoAP be use= d to transport 6TiSCH signaling traffic" on ML.
  • Thom= as=A0to confirm rough consensus on "RPL OF0 parameters" = on ML.
  • <= strong>Pouria=A0to present WirelessHART and and ISA100.11a equival= ent formats for "report flow" at next week's call.

Agenda

Minutes

  • [08.05]=A0Meeting starts
  • [08.07]=A0Administrivia
    • Approval minutes last call

      No issues raised. Minutes approved.

    • Approval agenda

      No issues raised. = Agenda approved.

  • [08.08]=A0Chartering process
  • Review proce= ss:
    • Dash= board
    • Ballot
    • History
    • Great feedback durin= g "Internal Review" state.
    • Some back-an= d-forth between members of IESG and Pascal/Thomas. Triggered some rewording= of the charter (see below).
    • State changed to=A0External review=A0from Internal review.=
  • Updates to charter text
      latest version on BitBucket=
    • dif= f on BitBucket=A0(click "Sid-by-side diff")
    • official charter versions
    • Re-ordered work items:
      1. "6TiSCH architecture"
      2. Information Mode= l
      3. "Minima= l 6TiSCH Configuration"
    • Changes to scope:
      • work item 2 = now includes a mapping of the information model to a data model (e.g. CoAP/= CBOR)
    • Clarifications:
      • About the use of RPL in th= e minimal draft: we are not changing RPL at all. Using RPL and OF0 in minim= al draft.
    • "On the Difference between Information Models a= nd Data Models" (RFC3444)
      • This RFC hig= hlights the difference between Informational Model (e.g UML diagrams) and D= ata Model (How data is represented and managed, e.g. CBOR)
  • [08.13]=A0CoAP=A0[30min]
    • presentation
      • CoAP overview:=A0[Rag= huram]
        • Carsten is one of the authors of CoAP.
        • Can be described a "HTTP for Low Power = Lossy devices"
        • Analogous to HTTP. Follows REST architecture.
        • CoAP brings the REST features to the = LLN domain.
        • Designed for minimal payload size.
        • Includes options relevant to the LLN domain.
        • On top of U= DP.
        • Defines mess= aging architecture.
        • Defines request/response formats.
        • Supports identification of resources through URIs.
        • Publish/subscribe features (diff= erent from HTTP)
        • 4 types of messages:
          • CON: confirmable (reliable)
          • NON: non-confirmable (unreliable)
          • ACK: acknowledgement
          • RST: reset
        • Wi= th CoAP, we can achieve reliable content delivery/request
        • Two identifiers:
          • Message ID: match messages of type Acknowledgement/Reset = to messages of type Confirmable/Non-confirmable
          • Token: used to correlate requests and responses
        • Th= ese two identifiers allow different models:
          • asynchronous, where response comes = on its own, possibly after the ACK.
        • 4 Basic Methods: GET/PUT/POST/DELETE
        • Multiple Respsnse categories (similar to HTTP)= :
          • 2xx
          • 4xx
          • 5xx
        • Op= tions and URIS.
          • Identification of resource= s
          • Representati= on of the resource
            • Content-format: defin= es the type of the content, e.g, text, uint16, etc.
        • Conditional options.
            <= li style=3D"margin:10px 0px;padding:0px;word-wrap:break-word">matching opti= ons to identify specific resources
          • age for cach= ing, etc.
        • URI Scheme:
          • Options are the containers of the parameters (uri).
          • Notion of URI in http.
          • Size of names in= the URI affect size of options so this is recommended to be minimal.
          • Does not def= ine the max size of the payload. recommend to have it smaller than PDU.
        • CoAP other topics:
          • Security usi= ng DTLS
          • = DICE
          • Ser= vice Discovery
          • Proxying - r= everse proxies/ relay proxies.
          • Caching - Max age
      • Observe feature in CoAP:=A0[Xavi]
        • The purpose is to stay aware of the updates of the state of the re= source. Don't want to actively poll all the time.
        • Interested n= ode registers to a resource, and will be pushed data from the server.
          • <= li style=3D"margin:10px 0px;padding:0px;word-wrap:break-word">The observer = sends a GET request to the server. The server responds with the current sta= te of resource, and adds the client to the list of observers.
        • "Observ= e" is an option of the GET method and response.
        • In the response, the "Obs= erve" option identifies the notification with a 24-bit integer value.<= /li>
        • This value i= ncrements between notifications, and is used to order the data received.
        • The observ= e option does not have anything to do with the query that is done. So it se= ems that the GET can contain Content-Match fields to make it conditional. T= hat is, if observe header is there, then this will be notified upon server = side changes on the resource (applying condition).
        • [Dom= inique]=A0How can a client know that the server is able to add the= client to the list of listeners?
        • draft-core-observe states:

          The Observe Option is not critical for processing the request. If the serve= r is unwilling or unable to add the client to the list of observers of the = target resource, then the request falls back to a normal GET request.

        • [Qin]=A0What kind of criteria can be used in the obs= erve pattern? That is, can the client somehow specify "exotic" cr= iterie (e.g. "send this metric when I have only one routing parent&quo= t;) design the criteria to get a notification?

          Action item:=A0Xavi=A0to send to ML (1) the list criteria currently defined = on CoAP observe pattern and (2) whether it is possible to extend this list.=

      • discussion > Action item:=A0Thomas=A0to= send list of CoAP elements that can be used in 6TiSCH to ML.
        • Next step: c= ontinue with CoAP payload discussion. CBOR??
      • Call for rough consensus on = using CoAP in 6TiSCH:

        No issue raised. R= ough consensus on the call. Action item:=A0Thomas=A0to con= firm rough consensus on "CoAP can be used to transport 6TiSCH signalli= ng traffic" on ML.

  • [08.55]=A0Rank rounding error, churn and= hysteresis
    • Context and overview discussion
      • RPL has a = mechanism for loop avoidance.
      • RPL OF0 - rank is a 2 byte value.
      • Several factors are used to compute the OF0.
        • =
      • minHopRankIn= crease -> makes integer part be a monotonically increasing byte
      • DAGRank(rank= ) is a function indicative of the rank of a node.
      • How do we propose changes/hints t= o the computation of the ETX.
    • Ca= ll for rough consensus on use OF0 as described in=A0http://www.ietf.org/mail-a= rchive/web/6tsch/current/msg01247.html.

      No issue raised. R= ough consensus on the call. Action item:=A0Thomas=A0to con= firm rough consensus on "RPL OF0 parameters" on ML.

    • discuss= ion on hysteresis
      • RFC6719

        Running out of tim= e. Moved to next week's call.

    • =
  • [09.09]<= /em>=A0AOB
    • Presenting W= irelessHART and and ISA100.11a equivalent formats next call?

      Action item:=A0Pouria=A0to present WirelessHART and and ISA100.11a equivalen= t formats for "report flow" at next week's call.

    • Any oth= er business?

      No other business = raised.

  • [09.08]=A0Meeting ends

    • --047d7b15b04301071004e64725c1-- From qinwang@berkeley.edu Fri Sep 13 11:11:16 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 762A521E811C for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 11:11:16 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.489 X-Spam-Level: X-Spam-Status: No, score=-2.489 tagged_above=-999 required=5 tests=[AWL=0.487, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sF64bD8D93Zy for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 11:11:12 -0700 (PDT) Received: from mail-ie0-f178.google.com (mail-ie0-f178.google.com [209.85.223.178]) by ietfa.amsl.com (Postfix) with ESMTP id 4CEFB11E8166 for <6tsch@ietf.org>; Fri, 13 Sep 2013 11:11:12 -0700 (PDT) Received: by mail-ie0-f178.google.com with SMTP id to1so3416712ieb.9 for <6tsch@ietf.org>; Fri, 13 Sep 2013 11:11:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=bhnNtBzx9NFgqCgdAasOIxyFMez1NcZojhtt/IXQoUA=; b=FwcgtjkyLv/mW6qmbP8TcwYc+IzQ6CxxyxRsK1bseVOoevokoVOLua4nsi6KOTBkqA gVNryCCP1dw1YwioDPlk7QSLbf0IDs6TJfVsLJCoA3HKWAx6q1Z1SjaxaNLqbfRfFgpt 05OZ7RV+H7wvmIeQhw26Mh9kaqbVBHULu0cyyZa0tAuAcNXN6Q/nSXCmQbX8VF9CwZ+v PmgPQGrrn/aMv0EoSf+Huecmf/WNXw0reU7z2dawoQDb+ZVlrclcDVMjhR21w7e8v86q GmLjPUnwNDEGKA/DBRzspSoD2hWs892XCUwx9GzOGCgoAMQJBr2HvAJxHglAEWe10yOO lY4Q== X-Gm-Message-State: ALoCoQnGOgIjkdRL45pPzxy5qGBYDE3GOoerxgZ74cml1gE5T/l+lTsqqQ/xSjOu6QMn8/rOxqLd MIME-Version: 1.0 X-Received: by 10.50.61.137 with SMTP id p9mr1800507igr.45.1379095871762; Fri, 13 Sep 2013 11:11:11 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Fri, 13 Sep 2013 11:11:11 -0700 (PDT) In-Reply-To: References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> Date: Sat, 14 Sep 2013 02:11:11 +0800 Message-ID: From: Qin Wang To: "Prof. Diego Dujovne" Content-Type: multipart/alternative; boundary=047d7bdca5dc8c452004e647c76c Cc: Thomas Watteyne , 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 18:11:16 -0000 --047d7bdca5dc8c452004e647c76c Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi Diego, I understand, theoretically, dynamic allocation may have some advantages in terms of increasing reliability. But, in the channel hopping network, it is challenge for a node to catch up the channel hopping sequence change in its neighbors. Thus, I think, if updating channel hopping sequence, it could be better to do it in network wide. What do you think? Thanks Qin On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne < diego.dujovne@mail.udp.cl> wrote: > Qin, > I think frequency blacklisting on a node-pair basis (either > centralized or distributed) would > break the schedule matrix structure, which overrides narrowband > interference by channel hopping. > If frequencies are blacklisted on all slots, that would waste > resources. Narrowband interference > can harm the link locally, but the same frequency may be > interference-free in other parts of > the net. > The dynamic allocation I propose was only an example. If you > have 16 frequencies > and 2 of them have interference, and the channel offset is sequential, > you may loose 2 packets > every 16. Am I right on this? > > Thoughts? > > Diego > > > 2013/9/13 Qin Wang : > > Thomas, > > > > I agree with you that it is not clear what is the advantage and > disadvantage > > of adaptive channel hopping in reality. > > > > In mind, based on the per-frequency report, PCE can do two things: (1) > > update channel hopping sequence is a frequency is really bad network > wide; > > (2) avoid use some bad channel when it runs cell allocation algorithm. > The > > two things happen in PCE, so, will not make negative impact on the > network. > > Thought? > > > > Thanks > > > > Qin > > > > > > > > > > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne > > wrote: > >> > >> Qin, Diego, > >> > >> My 2 cents. I agree with you that it would be nice for the PCE to be > able > >> to get some per-channel information. Although adaptive channel hopping > (i.e. > >> selectively blacklisting frequencies for a specific bundle) is > appealing in > >> principle, it's unclear (at least to me) whether the gains clearly > outweigh > >> the overhead (complexity, signalign traffic) one has to pay to > coordinate > >> this [1-5]. > >> > >> My opinion is that we should enable both metrics averages over all > >> channels, and per-channel metrics. In some configurations, one can > imagine > >> gathering the former by default, and querying for the latter on specif= ic > >> occasions. Having the option of gathering per-channel information does > >> enable us to be future-proof against future adaptive channel hopping > >> algorithm. > >> > >> For sure, this makes for a great question: how do a pair of motes and > the > >> PCE have to communicate to enable adaptive channel hopping on that > link? The > >> answer to that might directly impact the application payload formats w= e > have > >> are talking about. Is this something you be interested in looking > further > >> into? > >> > >> Thomas > >> > >> [1] A Decentralized Scheduling Algorithm for Time Synchronized Channel > >> Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Alexandre M. Baye= n. > >> ICST Transactions on Mobile Communications and Applications, 11(7-9). > >> European Union Digital Library link. doi:10.4108/icst.trans.mca.2011.e= 5. > >> September 2011. > >> [2] A Decentralized Scheduling Algorithm for Time Synchronized Channel > >> Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister. International > >> Conference on Ad Hoc Networks (ADHOCNETS), Victoria, BC, Canada, 18-20 > >> August 2010. > >> [3] Mitigating Multipath Fading Through Channel Hopping in Wireless > Sensor > >> Networks. Thomas Watteyne, Steven Lanzisera, Ankur Mehta, Kris Pister. > IEEE > >> International Conference on Communications (ICC), Cape Town, South > Africa, > >> 23-27 May, 2010. > >> [4] Feasibility Analysis of Controller Design for Adaptive Channel > >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven Glase= r, > >> Kris Pister. First International Workshop on Performance Methodologies > and > >> Tools for Wireless Sensor Networks (WSNPerf), Pisa, Italy, 23 October > 2009. > >> [5] Reliability Through Frequency Diversity: Why Channel Hopping Makes > >> Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM > International > >> Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor, and > >> Ubiquitous Networks (PE-WASUN), Tenerife, Canary Islands, Spain, 26-30 > >> October 2009. > >> > >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne > >> wrote: > >>> > >>> Hello Qin, > >>> I think that a per-frequency report will help the PCE > >>> to decide which frequency to use, and maybe temporarily > >>> black-list them. For example, a dynamic scheme may include > >>> sampling the blacklisted frequencies every X minutes to re-enable > >>> them once the interference has disappeared. > >>> This will require the node to refresh the RSSI > >>> and LQI values in a opportunistic way (every time the a cell > >>> uses that frequency) to save energy. > >>> > >>> Any thoughts? > >>> > >>> Diego > >> > >> > >> _______________________________________________ > >> 6tsch mailing list > >> 6tsch@ietf.org > >> https://www.ietf.org/mailman/listinfo/6tsch > >> > > > > > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > -- > DIEGO DUJOVNE > Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones > Facultad de Ingenier=EDa UDP > www.ingenieria.udp.cl > (56 2) 676 8125 > --047d7bdca5dc8c452004e647c76c Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Hi Diego,

    I understand, theoretically, = dynamic allocation may have some advantages in terms of increasing reliabil= ity. But, in the channel hopping network, it is challenge for a node to cat= ch up the channel hopping sequence change in its neighbors. Thus, I think, = if updating channel hopping sequence, it could be better to do it in networ= k wide. What do you think?

    Thanks
    Qin


    On Fri, Sep 13, 2013 at 11:28 PM, Pr= of. Diego Dujovne <diego.dujovne@mail.udp.cl> wrote:=
    Qin,
    =A0 =A0 =A0 I think frequency blacklisting on a node-pair basis (either
    centralized or distributed) would
    break the schedule matrix structure, which overrides narrowband
    interference by channel hopping.
    If frequencies are blacklisted on all slots, that would waste
    resources. Narrowband interference
    can harm the link locally, but the same frequency may be
    interference-free in other parts of
    the net.
    =A0 =A0 =A0 The dynamic allocation I propose was only an example. If you have 16 frequencies
    and 2 of them have interference, and the channel offset is sequential,
    you may loose 2 packets
    every 16. Am I right on this?

    Thoughts?

    =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Diego


    2013/9/13 Qin Wang <qinwang@berk= eley.edu>:
    > Thomas,
    >
    > I agree with you that it is not clear what is the advantage and disadv= antage
    > of adaptive channel hopping in reality.
    >
    > In mind, based on the per-frequency report, PCE can do two things: (1)=
    > update channel hopping sequence is a frequency is really bad network w= ide;
    > (2) avoid use some bad channel when it runs cell allocation algorithm.= =A0The
    > two things happen in PCE, so, will not make negative impact on the net= work.
    > Thought?
    >
    > Thanks
    >
    > Qin
    >
    >
    >
    >
    > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne
    > <watteyne@eecs.berkel= ey.edu> wrote:
    >>
    >> Qin, Diego,
    >>
    >> My 2 cents. I agree with you that it would be nice for the PCE to = be able
    >> to get some per-channel information. Although adaptive channel hop= ping (i.e.
    >> selectively blacklisting frequencies for a specific bundle) is app= ealing in
    >> principle, it's unclear (at least to me) whether the gains cle= arly outweigh
    >> the overhead (complexity, signalign traffic) one has to pay to coo= rdinate
    >> this [1-5].
    >>
    >> My opinion is that we should enable both metrics averages over all=
    >> channels, and per-channel metrics. In some configurations, one can= imagine
    >> gathering the former by default, and querying for the latter on sp= ecific
    >> occasions. Having the option of gathering per-channel information = does
    >> enable us to be future-proof against future adaptive channel hoppi= ng
    >> algorithm.
    >>
    >> For sure, this makes for a great question: how do a pair of motes = and the
    >> PCE have to communicate to enable adaptive channel hopping on that= link? The
    >> answer to that might directly impact the application payload forma= ts we have
    >> are talking about. Is this something you be interested in looking = further
    >> into?
    >>
    >> Thomas
    >>
    >> [1] A Decentralized Scheduling Algorithm for Time Synchronized Cha= nnel
    >> Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Alexandre M. = Bayen.
    >> ICST Transactions on Mobile Communications and Applications, 11(7-= 9).
    >> European Union Digital Library link. doi:10.4108/icst.trans.mca.20= 11.e5.
    >> September 2011.
    >> [2] A Decentralized Scheduling Algorithm for Time Synchronized Cha= nnel
    >> Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister. International=
    >> Conference on Ad Hoc Networks (ADHOCNETS), Victoria, BC, Canada, 1= 8-20
    >> August 2010.
    >> [3] Mitigating Multipath Fading Through Channel Hopping in Wireles= s Sensor
    >> Networks. Thomas Watteyne, Steven Lanzisera, Ankur Mehta, Kris Pis= ter. IEEE
    >> International Conference on Communications (ICC), Cape Town, South= Africa,
    >> 23-27 May, 2010.
    >> [4] Feasibility Analysis of Controller Design for Adaptive Channel=
    >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven G= laser,
    >> Kris Pister. First International Workshop on Performance Methodolo= gies and
    >> Tools for Wireless Sensor Networks (WSNPerf), Pisa, Italy, 23 Octo= ber 2009.
    >> [5] Reliability Through Frequency Diversity: Why Channel Hopping M= akes
    >> Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM Intern= ational
    >> Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor, an= d
    >> Ubiquitous Networks (PE-WASUN), Tenerife, Canary Islands, Spain, 2= 6-30
    >> October 2009.
    >>
    >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne
    >> <diego.dujovne@mai= l.udp.cl> wrote:
    >>>
    >>> Hello Qin,
    >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 I think that a per-frequency repor= t will help the PCE
    >>> to decide which frequency to use, and maybe temporarily
    >>> black-list them. For example, a dynamic scheme may include
    >>> sampling the blacklisted frequencies every X minutes to re-ena= ble
    >>> them once the interference has disappeared.
    >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0This will require the node to refre= sh the RSSI
    >>> and LQI values in a opportunistic way (every time the a cell >>> uses that frequency) to save energy.
    >>>
    >>> Any thoughts?
    >>>
    >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Diego<= br> >>
    >>
    >> _______________________________________________
    >> 6tsch mailing list
    >> 6tsch@ietf.org
    >> https://www.ietf.org/mailman/listinfo/6tsch
    >>
    >
    >
    > _______________________________________________
    > 6tsch mailing list
    > 6tsch@ietf.org
    > https://www.ietf.org/mailman/listinfo/6tsch
    >



    --
    DIEGO DUJOVNE
    Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP
    www.ingenieria.u= dp.cl
    (56 2) 676 8125

    --047d7bdca5dc8c452004e647c76c-- From qinwang@berkeley.edu Fri Sep 13 11:22:46 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B2EA911E81CC for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 11:22:45 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.55 X-Spam-Level: X-Spam-Status: No, score=-2.55 tagged_above=-999 required=5 tests=[AWL=0.426, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VJtGvBc9iiu3 for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 11:22:31 -0700 (PDT) Received: from mail-ie0-f177.google.com (mail-ie0-f177.google.com [209.85.223.177]) by ietfa.amsl.com (Postfix) with ESMTP id 649AA11E81C0 for <6tsch@ietf.org>; Fri, 13 Sep 2013 11:22:28 -0700 (PDT) Received: by mail-ie0-f177.google.com with SMTP id qd12so3134725ieb.8 for <6tsch@ietf.org>; Fri, 13 Sep 2013 11:22:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=MDyL/pMlV7rmiVr4MEzuyOa83c/tOShhXKWAl38Ai9A=; b=ElJuMuxY477+i/RdGYy7MILCpQSl9lQdvlJgRZ9S1GPP3+1Ftfi2HVF6E4OnLqsriY p7cXrLOmMYIcoWSiQZhub4dH1LcIcDdKqKPqEEmW52D8gLb2bJlxurekKM6swkAVyFuW 9jvkR2hoDse7ununybmH0aInZBYqOP21fIZwpnvqfy5CS1VeZESSKc0TBqSjoYiNClzI DbaZXcj35AvOSEqkl4u351Vx+/XiuD7kKR2EM53cHMXGWf4M+rxxNixBGpBD7+zzUDOx cKpF2p9RB3IkwFFDaYyIptMH7cG2556h3Fck/cCr0y3qaByezwCo3qTx4VAZ57ryj4Xo 2XJg== X-Gm-Message-State: ALoCoQmkh1RpuI07PCTRIQHcVcMtL6CjC1m9RBeIgYbfOhOpLhyTdIw41K9YMKNgoe38e8/8dDWG MIME-Version: 1.0 X-Received: by 10.50.66.101 with SMTP id e5mr1852251igt.26.1379096547901; Fri, 13 Sep 2013 11:22:27 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Fri, 13 Sep 2013 11:22:27 -0700 (PDT) In-Reply-To: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7C9AE@EXMBX23.ad.utwente.nl> References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7C9AE@EXMBX23.ad.utwente.nl> Date: Sat, 14 Sep 2013 02:22:27 +0800 Message-ID: From: Qin Wang To: "P.Zand@utwente.nl" Content-Type: multipart/alternative; boundary=001a1135ec0cd9789a04e647ef1e Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org>, "Prof. Diego Dujovne" Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 18:22:46 -0000 --001a1135ec0cd9789a04e647ef1e Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi Pouria, In the centralized case, I believe PCE will take care everything you mentioned. That means internal-interference caused by other neighboring communication should not be the contributor to low link quality of a cell. Thus, I think PCE will use per-cell report to adjust over-provision of cells. For example, when PCE found a bundle of cells can not achieve required BW, PCE may assign more cells. Make sense? Qin On Sat, Sep 14, 2013 at 12:45 AM, wrote: > Dear All, > Regarding to the Xavi's report list, I found "per-cell" reports for each > node (in addition to potential "per-frequency" and "per-neighbor" reports= ) > in the list. I have the following concerns, > (1) In the centralized management approach, what is the gain of reporting > the statistics "per-cell"? Per-cell information will be used to evaluate > the potential internal-interference caused by other neighboring > communication. Am I right? Shouldn't the PCE, take care of allocation of > cells (either dedicated or shared cells)? I mean, shouldn't the PCE take > care of not allocating (re-using) the dedicated cell to two different > pairs? Shouldn't the PCE take care of allocating the shared cell to the > limited number of transmitters? > (2) For sure, in the "per-frequency" and "per-neighbor" reports, each nod= e > has a limited number of frequencies (i.e. 11-26 in 2.4GHz) and a maximum > number of linked-neighbors to report. However, in reporting "per-cell", > what is the maximum number of cells defined for a node? (We might also > consider the dense traffic scenarios). > Am I missing anything? > Best Wishes, > Pouria > > -----Original Message----- > From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of > Prof. Diego Dujovne > Sent: Friday, September 13, 2013 5:29 PM > To: Qin Wang > Cc: Thomas Watteyne; 6TSCH > Subject: Re: [6tsch] report flow contents > > Qin, > I think frequency blacklisting on a node-pair basis (either > centralized or distributed) would break the schedule matrix structure, > which overrides narrowband interference by channel hopping. > If frequencies are blacklisted on all slots, that would waste resources. > Narrowband interference can harm the link locally, but the same frequency > may be interference-free in other parts of the net. > The dynamic allocation I propose was only an example. If you have 1= 6 > frequencies and 2 of them have interference, and the channel offset is > sequential, you may loose 2 packets every 16. Am I right on this? > > Thoughts? > > Diego > > > 2013/9/13 Qin Wang : > > Thomas, > > > > I agree with you that it is not clear what is the advantage and > > disadvantage of adaptive channel hopping in reality. > > > > In mind, based on the per-frequency report, PCE can do two things: (1) > > update channel hopping sequence is a frequency is really bad network > > wide; > > (2) avoid use some bad channel when it runs cell allocation algorithm. > > The two things happen in PCE, so, will not make negative impact on the > network. > > Thought? > > > > Thanks > > > > Qin > > > > > > > > > > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne > > wrote: > >> > >> Qin, Diego, > >> > >> My 2 cents. I agree with you that it would be nice for the PCE to be > >> able to get some per-channel information. Although adaptive channel > hopping (i.e. > >> selectively blacklisting frequencies for a specific bundle) is > >> appealing in principle, it's unclear (at least to me) whether the > >> gains clearly outweigh the overhead (complexity, signalign traffic) > >> one has to pay to coordinate this [1-5]. > >> > >> My opinion is that we should enable both metrics averages over all > >> channels, and per-channel metrics. In some configurations, one can > >> imagine gathering the former by default, and querying for the latter > >> on specific occasions. Having the option of gathering per-channel > >> information does enable us to be future-proof against future adaptive > >> channel hopping algorithm. > >> > >> For sure, this makes for a great question: how do a pair of motes and > >> the PCE have to communicate to enable adaptive channel hopping on > >> that link? The answer to that might directly impact the application > >> payload formats we have are talking about. Is this something you be > >> interested in looking further into? > >> > >> Thomas > >> > >> [1] A Decentralized Scheduling Algorithm for Time Synchronized > >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Alexandre > M. Bayen. > >> ICST Transactions on Mobile Communications and Applications, 11(7-9). > >> European Union Digital Library link. doi:10.4108/icst.trans.mca.2011.e= 5. > >> September 2011. > >> [2] A Decentralized Scheduling Algorithm for Time Synchronized > >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister. > >> International Conference on Ad Hoc Networks (ADHOCNETS), Victoria, > >> BC, Canada, 18-20 August 2010. > >> [3] Mitigating Multipath Fading Through Channel Hopping in Wireless > >> Sensor Networks. Thomas Watteyne, Steven Lanzisera, Ankur Mehta, Kris > >> Pister. IEEE International Conference on Communications (ICC), Cape > >> Town, South Africa, > >> 23-27 May, 2010. > >> [4] Feasibility Analysis of Controller Design for Adaptive Channel > >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven > >> Glaser, Kris Pister. First International Workshop on Performance > >> Methodologies and Tools for Wireless Sensor Networks (WSNPerf), Pisa, > Italy, 23 October 2009. > >> [5] Reliability Through Frequency Diversity: Why Channel Hopping > >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM > >> International Symposium on Performance Evaluation of Wireless Ad Hoc, > >> Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife, Canary Islands, > >> Spain, 26-30 October 2009. > >> > >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne > >> wrote: > >>> > >>> Hello Qin, > >>> I think that a per-frequency report will help the PCE > >>> to decide which frequency to use, and maybe temporarily black-list > >>> them. For example, a dynamic scheme may include sampling the > >>> blacklisted frequencies every X minutes to re-enable them once the > >>> interference has disappeared. > >>> This will require the node to refresh the RSSI and LQI > >>> values in a opportunistic way (every time the a cell uses that > >>> frequency) to save energy. > >>> > >>> Any thoughts? > >>> > >>> Diego > >> > >> > >> _______________________________________________ > >> 6tsch mailing list > >> 6tsch@ietf.org > >> https://www.ietf.org/mailman/listinfo/6tsch > >> > > > > > > _______________________________________________ > > 6tsch mailing list > > 6tsch@ietf.org > > https://www.ietf.org/mailman/listinfo/6tsch > > > > > > -- > DIEGO DUJOVNE > Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones > Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl > (56 2) 676 8125 > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > --001a1135ec0cd9789a04e647ef1e Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Hi Pouria,

    In the centralized case, I b= elieve PCE will take care everything you mentioned. That means=A0internal-interference caused by= other neighboring communication should not be the contributor to=A0= low link quality of a cell. Thus, I think PCE will use per-cell report to a= djust over-provision of cells. For example, when PCE found a bundle of cell= s can not achieve required BW, PCE may assign more cells.

    Make sense?
    Qin


    On Sat, Sep 14, 2013 at 12:45 A= M, <P.Zand@utwente.nl> wrote:
    Dear All,
    Regarding to the Xavi's report list, I found "per-cell" repor= ts for each node (in addition to potential "per-frequency" and &q= uot;per-neighbor" reports) in the list. I have the following concerns,=
    (1) In the centralized management approach, what is the gain of reporting t= he statistics "per-cell"? Per-cell information will be used to ev= aluate the potential internal-interference caused by other neighboring comm= unication. Am I right? Shouldn't the PCE, take care of allocation of ce= lls (either dedicated or shared cells)? I mean, shouldn't the PCE take = care of not allocating (re-using) the dedicated cell to two different pairs= ? Shouldn't the PCE take care of allocating the shared cell to the limi= ted number of transmitters?
    (2) For sure, in the "per-frequency" and "per-neighbor"= reports, each node has a limited number of frequencies (i.e. 11-26 in 2.4G= Hz) and a maximum number of linked-neighbors to report. However, in reporti= ng "per-cell", what is the maximum number of cells defined for a = node? (We might also consider the dense traffic scenarios).
    Am I missing anything?
    Best Wishes,
    Pouria

    -----Original Message-----
    From: 6tsch-bounces@ietf.org = [mailto:6tsch-bounces@ietf.org] On Behalf Of Prof. Diego Dujovne
    Sent: Friday, September 13, 2013 5:29 PM
    To: Qin Wang
    Cc: Thomas Watteyne; 6TSCH
    Subject: Re: [6tsch] report flow contents

    Qin,
    =A0 =A0 =A0 I think frequency blacklisting on a node-pair basis (either cen= tralized or distributed) would break the schedule matrix structure, which o= verrides narrowband interference by channel hopping.
    If frequencies are blacklisted on all slots, that would waste resources. Na= rrowband interference can harm the link locally, but the same frequency may= be interference-free in other parts of the net.
    =A0 =A0 =A0 The dynamic allocation I propose was only an example. If you ha= ve 16 frequencies and 2 of them have interference, and the channel offset i= s sequential, you may loose 2 packets every 16. Am I right on this?

    Thoughts?

    =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Diego


    2013/9/13 Qin Wang <    qinwang@berk= eley.edu>:
    > Thomas,
    >
    > I agree with you that it is not clear what is the advantage and
    > disadvantage of adaptive channel hopping in reality.
    >
    > In mind, based on the per-frequency report, PCE can do two things: (1)=
    > update channel hopping sequence is a frequency is really bad network > wide;
    > (2) avoid use some bad channel when it runs cell allocation algorithm.=
    > The two things happen in PCE, so, will not make negative impact on the= network.
    > Thought?
    >
    > Thanks
    >
    > Qin
    >
    >
    >
    >
    > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne
    > <watteyne@eecs.berkel= ey.edu> wrote:
    >>
    >> Qin, Diego,
    >>
    >> My 2 cents. I agree with you that it would be nice for the PCE to = be
    >> able to get some per-channel information. Although adaptive channe= l hopping (i.e.
    >> selectively blacklisting frequencies for a specific bundle) is
    >> appealing in principle, it's unclear (at least to me) whether = the
    >> gains clearly outweigh the overhead (complexity, signalign traffic= )
    >> one has to pay to coordinate this [1-5].
    >>
    >> My opinion is that we should enable both metrics averages over all=
    >> channels, and per-channel metrics. In some configurations, one can=
    >> imagine gathering the former by default, and querying for the latt= er
    >> on specific occasions. Having the option of gathering per-channel<= br> >> information does enable us to be future-proof against future adapt= ive
    >> channel hopping algorithm.
    >>
    >> For sure, this makes for a great question: how do a pair of motes = and
    >> the PCE have to communicate to enable adaptive channel hopping on<= br> >> that link? The answer to that might directly impact the applicatio= n
    >> payload formats we have are talking about. Is this something you b= e
    >> interested in looking further into?
    >>
    >> Thomas
    >>
    >> [1] A Decentralized Scheduling Algorithm for Time Synchronized
    >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Alexa= ndre M. Bayen.
    >> ICST Transactions on Mobile Communications and Applications, 11(7-= 9).
    >> European Union Digital Library link. doi:10.4108/icst.trans.mca.20= 11.e5.
    >> September 2011.
    >> [2] A Decentralized Scheduling Algorithm for Time Synchronized
    >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister.
    >> International Conference on Ad Hoc Networks (ADHOCNETS), Victoria,=
    >> BC, Canada, 18-20 August 2010.
    >> [3] Mitigating Multipath Fading Through Channel Hopping in Wireles= s
    >> Sensor Networks. Thomas Watteyne, Steven Lanzisera, Ankur Mehta, K= ris
    >> Pister. IEEE International Conference on Communications (ICC), Cap= e
    >> Town, South Africa,
    >> 23-27 May, 2010.
    >> [4] Feasibility Analysis of Controller Design for Adaptive Channel=
    >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven >> Glaser, Kris Pister. First International Workshop on Performance >> Methodologies and Tools for Wireless Sensor Networks (WSNPerf), Pi= sa, Italy, 23 October 2009.
    >> [5] Reliability Through Frequency Diversity: Why Channel Hopping >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM<= br> >> International Symposium on Performance Evaluation of Wireless Ad H= oc,
    >> Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife, Canary Islan= ds,
    >> Spain, 26-30 October 2009.
    >>
    >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne
    >> <diego.dujovne@mai= l.udp.cl> wrote:
    >>>
    >>> Hello Qin,
    >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 I think that a per-frequency repor= t will help the PCE
    >>> to decide which frequency to use, and maybe temporarily black-= list
    >>> them. For example, a dynamic scheme may include sampling the >>> blacklisted frequencies every X minutes to re-enable them once= the
    >>> interference has disappeared.
    >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0This will require the node to refre= sh the RSSI and LQI
    >>> values in a opportunistic way (every time the a cell uses that=
    >>> frequency) to save energy.
    >>>
    >>> Any thoughts?
    >>>
    >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Diego<= br> >>
    >>
    >> _______________________________________________
    >> 6tsch mailing list
    >> 6tsch@ietf.org
    >> https://www.ietf.org/mailman/listinfo/6tsch
    >>
    >
    >
    > _______________________________________________
    > 6tsch mailing list
    > 6tsch@ietf.org
    > https://www.ietf.org/mailman/listinfo/6tsch
    >



    --
    DIEGO DUJOVNE
    Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones F= acultad de Ingenier=EDa UDP www.ingenieria.udp.cl
    (56 2) 676 8125
    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch

    --001a1135ec0cd9789a04e647ef1e-- From diego.dujovne@mail.udp.cl Fri Sep 13 12:07:23 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7225A11E816D for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 12:07:23 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.977 X-Spam-Level: X-Spam-Status: No, score=-2.977 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YqZ7pTlEZx77 for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 12:07:11 -0700 (PDT) Received: from mail-wi0-f176.google.com (mail-wi0-f176.google.com [209.85.212.176]) by ietfa.amsl.com (Postfix) with ESMTP id 8290A21F9E9F for <6tsch@ietf.org>; Fri, 13 Sep 2013 12:06:50 -0700 (PDT) Received: by mail-wi0-f176.google.com with SMTP id cb5so1224187wib.3 for <6tsch@ietf.org>; Fri, 13 Sep 2013 12:06:49 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=D4eCzlTgn4BwoOjZv2puDLtixUHGrvVqKZ21t29tFxQ=; b=WNtpt7uakxcV+fynOCrOyNqKivK2PALytF1mP4ll/aqSMFyvotRZcW4a+PEfz1yJUH 7GdyM+VDi919o/wP+lMDb+3tuESzRj3CBOADq1X/ngikW5RNGcKWGGfYP2Z8NrAHLUD7 hc3Qcs0ZYi7Lf03xCveHxvBcLsz/XRNFnwzA8uKKv6Mf8ej5LlEbwN9fv2kvM2We03q2 gOBh2fVE9MEIMMBL7ijk6UznUAD+IuM3j6KgPXOvUCcJ9vPZThjfaVV06DfHlcMAVG/v 24oFXpYCRKhZaHwkKF0ixX0ed3CaPyNylVNg+tueE8TssYBHgfo5uT0WxlY072PpR08h njWA== X-Gm-Message-State: ALoCoQlNXhsnWUk7ULv9yWFhWYkD6VO5913OjB8Qujs3xWSREPyjRoqPK6y6FtLIHs7G3OVNNBdM MIME-Version: 1.0 X-Received: by 10.180.206.5 with SMTP id lk5mr3860860wic.10.1379099209292; Fri, 13 Sep 2013 12:06:49 -0700 (PDT) Received: by 10.194.122.103 with HTTP; Fri, 13 Sep 2013 12:06:49 -0700 (PDT) In-Reply-To: References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> Date: Fri, 13 Sep 2013 16:06:49 -0300 Message-ID: From: "Prof. Diego Dujovne" To: Qin Wang Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: Thomas Watteyne , 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 19:07:26 -0000 Hi Qin, On the centralized case, changing the channel hopping sequence (and thus blacklisting the channels with interference) on the whole network, and not in a peer basis is not efficient in terms of channel usage. Let me explain this with an example: Let's say there is are 4 nodes: A, B, C and D. A and B are interfered only on channel 4 by an external source, while C and D listen interference only on channel 8. If I disable channel 4 and 8 by blacklisting both channels from the hopping sequence, A and B won't be able to use channel 8 and C and D won't be able to use channel 4, both interference free between them. On the distributed case, if two nodes are already connected and if both detect a interfered channel they will (someway) agree to blacklist that channel from the hopping sequence. But we have not arrived to this case yet on 6TiSCH. On the other side, if we blacklist by changing the hopping sequence, a node talking to different neighbours will have different channel hopping sequences. And this increases complexity too. I don't have an answer (just questions) on how to reduce the probability of using an interfered channel, but it seems that the current tsch scheme does not allow a simple way to blacklist channels unless it is done network-wide. To sum up, I'm worrying about reducing channel diversity. Thoughts? Diego 2013/9/13 Qin Wang : > Hi Diego, > > I understand, theoretically, dynamic allocation may have some advantages = in > terms of increasing reliability. But, in the channel hopping network, it = is > challenge for a node to catch up the channel hopping sequence change in i= ts > neighbors. Thus, I think, if updating channel hopping sequence, it could = be > better to do it in network wide. What do you think? > > Thanks > Qin > > > On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne > wrote: >> >> Qin, >> I think frequency blacklisting on a node-pair basis (either >> centralized or distributed) would >> break the schedule matrix structure, which overrides narrowband >> interference by channel hopping. >> If frequencies are blacklisted on all slots, that would waste >> resources. Narrowband interference >> can harm the link locally, but the same frequency may be >> interference-free in other parts of >> the net. >> The dynamic allocation I propose was only an example. If you >> have 16 frequencies >> and 2 of them have interference, and the channel offset is sequential, >> you may loose 2 packets >> every 16. Am I right on this? >> >> Thoughts? >> >> Diego >> >> >> 2013/9/13 Qin Wang : >> > Thomas, >> > >> > I agree with you that it is not clear what is the advantage and >> > disadvantage >> > of adaptive channel hopping in reality. >> > >> > In mind, based on the per-frequency report, PCE can do two things: (1) >> > update channel hopping sequence is a frequency is really bad network >> > wide; >> > (2) avoid use some bad channel when it runs cell allocation algorithm. >> > The >> > two things happen in PCE, so, will not make negative impact on the >> > network. >> > Thought? >> > >> > Thanks >> > >> > Qin >> > >> > >> > >> > >> > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne >> > wrote: >> >> >> >> Qin, Diego, >> >> >> >> My 2 cents. I agree with you that it would be nice for the PCE to be >> >> able >> >> to get some per-channel information. Although adaptive channel hoppin= g >> >> (i.e. >> >> selectively blacklisting frequencies for a specific bundle) is >> >> appealing in >> >> principle, it's unclear (at least to me) whether the gains clearly >> >> outweigh >> >> the overhead (complexity, signalign traffic) one has to pay to >> >> coordinate >> >> this [1-5]. >> >> >> >> My opinion is that we should enable both metrics averages over all >> >> channels, and per-channel metrics. In some configurations, one can >> >> imagine >> >> gathering the former by default, and querying for the latter on >> >> specific >> >> occasions. Having the option of gathering per-channel information doe= s >> >> enable us to be future-proof against future adaptive channel hopping >> >> algorithm. >> >> >> >> For sure, this makes for a great question: how do a pair of motes and >> >> the >> >> PCE have to communicate to enable adaptive channel hopping on that >> >> link? The >> >> answer to that might directly impact the application payload formats = we >> >> have >> >> are talking about. Is this something you be interested in looking >> >> further >> >> into? >> >> >> >> Thomas >> >> >> >> [1] A Decentralized Scheduling Algorithm for Time Synchronized Channe= l >> >> Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Alexandre M. >> >> Bayen. >> >> ICST Transactions on Mobile Communications and Applications, 11(7-9). >> >> European Union Digital Library link. >> >> doi:10.4108/icst.trans.mca.2011.e5. >> >> September 2011. >> >> [2] A Decentralized Scheduling Algorithm for Time Synchronized Channe= l >> >> Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister. International >> >> Conference on Ad Hoc Networks (ADHOCNETS), Victoria, BC, Canada, 18-2= 0 >> >> August 2010. >> >> [3] Mitigating Multipath Fading Through Channel Hopping in Wireless >> >> Sensor >> >> Networks. Thomas Watteyne, Steven Lanzisera, Ankur Mehta, Kris Pister= . >> >> IEEE >> >> International Conference on Communications (ICC), Cape Town, South >> >> Africa, >> >> 23-27 May, 2010. >> >> [4] Feasibility Analysis of Controller Design for Adaptive Channel >> >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven >> >> Glaser, >> >> Kris Pister. First International Workshop on Performance Methodologie= s >> >> and >> >> Tools for Wireless Sensor Networks (WSNPerf), Pisa, Italy, 23 October >> >> 2009. >> >> [5] Reliability Through Frequency Diversity: Why Channel Hopping Make= s >> >> Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM >> >> International >> >> Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor, and >> >> Ubiquitous Networks (PE-WASUN), Tenerife, Canary Islands, Spain, 26-3= 0 >> >> October 2009. >> >> >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne >> >> wrote: >> >>> >> >>> Hello Qin, >> >>> I think that a per-frequency report will help the PCE >> >>> to decide which frequency to use, and maybe temporarily >> >>> black-list them. For example, a dynamic scheme may include >> >>> sampling the blacklisted frequencies every X minutes to re-enable >> >>> them once the interference has disappeared. >> >>> This will require the node to refresh the RSSI >> >>> and LQI values in a opportunistic way (every time the a cell >> >>> uses that frequency) to save energy. >> >>> >> >>> Any thoughts? >> >>> >> >>> Diego >> >> >> >> >> >> _______________________________________________ >> >> 6tsch mailing list >> >> 6tsch@ietf.org >> >> https://www.ietf.org/mailman/listinfo/6tsch >> >> >> > >> > >> > _______________________________________________ >> > 6tsch mailing list >> > 6tsch@ietf.org >> > https://www.ietf.org/mailman/listinfo/6tsch >> > >> >> >> >> -- >> DIEGO DUJOVNE >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicacione= s >> Facultad de Ingenier=EDa UDP >> www.ingenieria.udp.cl >> (56 2) 676 8125 > > --=20 DIEGO DUJOVNE Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl (56 2) 676 8125 From mehdi.sabzevari@yahoo.com Fri Sep 13 21:47:56 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4175721F9D39 for <6tsch@ietfa.amsl.com>; 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14 Sep 2013 04:47:47 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1379134067; bh=4On+tOSGO5at7bDivRehooeCpzM2EE03uiLOJfHBNn4=; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:Message-ID:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type; b=ICOB90ZSttrmCj4nDKnbc9/SMikx8PhtGiMz7p1LOY19Sre3A45cNxp7rbRy44w8f31nqB9laJEthsAOU+0ReJk6Yk/L3I9PX/Kvz3C9IzpgB3WMKZw7JIHGt03R/7hmGKy4dDJWKbtpMOy/Bu/HRWdzgNxTfhbjH/UW0ChvSBc= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:Message-ID:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type; b=FnxR+9Oky6FdUU/gvB0BATavIzaN1SxtasYTqGNAdOHbgYV32nCYOFi5LaeUcZJSIqWGzfVC0hKx5+jepGPt5CTH1Y22ZbC6h1B+oUZ2+I1pp7X47s9mkRKlfG2hloX1ReL+kPQ3P8EvaBX+FXfO9d3pR8xt/u28gF3prN3y+0E=; X-YMail-OSG: cYrCORMVM1mKuHS1X4oQWQfS4prqW_f3tMiatDczCpxGn2s PqC534__tgZRjg8L7alTx8trm5fU6UZQ9YzuXQN9NctViv.hEznnCw1KwOOy QJ_2521nBzvyOELIb5Vjw1mdmq69LqPe6D_lR9oeUbtzwfbG5Hn2OJ7rh1Cz hvdgRyExLPLeZIjvhp.9DklpQnnpxe96L3n6PvqN9d4GaFe1IDcNKgS07FjS eFfMJLk6orR4Mdko69LoiSU19xZvZUeZVrLIWtaBqU3RdDdbTOvsTLgKO.hw QgPUZU9Oa9nkoCjxs5rACnQja.mFz_sfBfmW0FGnvxkT91bD4ln85KLwToD0 zIUddXHf_fyuniKKFT5Rx9T1qL324JtIvvLapoB6l27_2oBAFjwXUxGayh8W nsNx8zsYCVo2jflcmspX3IMXb94CSrScEuUc6qzvZTygKljsoNH9CwD_Yacm yRsv3DQiUnHALKbNoMJWKxEwHYdcr.p0Fm.ScIX9B7NuSKwJH7EdTjIibJt8 WthK7xUtbKOxKXq4bHBSDC.Z3Ii9o_kcYRrKXA7w5CRTERKU56_RPlP4hCtV d7cekV0opgYEGV4cW47j6m_zjr9CtU3Q- Received: from [65.49.68.188] by web121105.mail.ne1.yahoo.com via HTTP; Fri, 13 Sep 2013 21:47:47 PDT X-Rocket-MIMEInfo: 002.001, SGkgQWxsCkkgaGF2ZSBhIHF1ZXN0aW9uIGFib3V0IHNjaGVkdWxpbmcgb2YgY2VsbCBhcyBzaGFyZWQvZGVkaWNhdGVkLCBQcmV2aW91c2x5IHRoYW5rcyBmb3IgeW91ciByZXF1ZXN0LiA6KQrCoFdoYXQgaXMgdGhlIGJlc3QgdGltZShwbGFjZSkgZm9yIHNjaGVkdWxpbmcgYSBjZWxsIGFzIHNoYXJlZC9kZWRpY2F0ZWQ_IENhbiBpdCBiZSBzY2hlZHVsZWQgYnkgYWR2ZXJ0aXNlbWVudD8gb3IgSXQgc2hvdWxkIGJlIHNjaGVkdWxlIGJlZm9yZSBjb21tdW5pY2F0aW9uIG9mIHBlZXJzPwoKClJlZ2FyZHMKTWUBMAEBAQE- X-Mailer: YahooMailWebService/0.8.157.561 Message-ID: <1379134067.81607.YahooMailNeo@web121105.mail.ne1.yahoo.com> Date: Fri, 13 Sep 2013 21:47:47 -0700 (PDT) From: mehdi sabzevari To: "6tsch@ietf.org" <6tsch@ietf.org>, "twatteyne@gmail.com" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="1018116533-2033793064-1379134067=:81607" Subject: [6tsch] scheduling of cells X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: mehdi sabzevari List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 14 Sep 2013 04:47:56 -0000 --1018116533-2033793064-1379134067=:81607 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Hi All=0AI have a question about scheduling of cell as shared/dedicated, Pr= eviously thanks for your request. :)=0A=A0What is the best time(place) for = scheduling a cell as shared/dedicated? Can it be scheduled by advertisement= ? or It should be schedule before communication of peers?=0A=0A=0ARegards= =0AMehdi=0A --1018116533-2033793064-1379134067=:81607 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
    Hi All
    I have a question about scheduling of cell as shared/dedicated, Previously= thanks for your request. :)
     What is the best time(place) f= or scheduling a cell as shared/dedicated? Can it be scheduled by advertisem= ent? or It should be schedule before communication of peers?

    =

    Regards
    Mehdi

    --1018116533-2033793064-1379134067=:81607-- From mehdi.sabzevari@yahoo.com Fri Sep 13 21:56:09 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1BE9321F9E9F for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 21:56:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.854 X-Spam-Level: X-Spam-Status: No, score=-1.854 tagged_above=-999 required=5 tests=[AWL=0.744, BAYES_00=-2.599, HTML_MESSAGE=0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XXxCn0meSotP for <6tsch@ietfa.amsl.com>; Fri, 13 Sep 2013 21:56:03 -0700 (PDT) Received: from nm4-vm0.bullet.mail.ne1.yahoo.com (nm4-vm0.bullet.mail.ne1.yahoo.com [98.138.90.253]) by ietfa.amsl.com (Postfix) with ESMTP id 7CFCE21F9E9C for <6tsch@ietf.org>; Fri, 13 Sep 2013 21:56:03 -0700 (PDT) Received: from [98.138.90.51] by nm4.bullet.mail.ne1.yahoo.com with NNFMP; 14 Sep 2013 04:56:01 -0000 Received: from [98.138.89.171] by tm4.bullet.mail.ne1.yahoo.com with NNFMP; 14 Sep 2013 04:56:01 -0000 Received: from [127.0.0.1] by omp1027.mail.ne1.yahoo.com with NNFMP; 14 Sep 2013 04:56:01 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 935569.76550.bm@omp1027.mail.ne1.yahoo.com Received: (qmail 87210 invoked by uid 60001); 14 Sep 2013 04:56:01 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1379134561; bh=hPF0Jpkj7VSXK5q4LNaNJVb6vfpbs413PtPF+cXPEwo=; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=Ezs5KJ3OzI639eFKk/3wztyoFtgBzNcvJgcINXSgw/2++YcNqXlDU4peivvcvNgtZxvS7hmBECvvi8kR7z2Qn83JEu9Ew16FBXqdLAhm3yn3T6+iI9yArBp8xwEKwPyNZOwW69+tLAfMnfgPI7VwIjrxUZcLkIu0vw2MrNQmM08= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=19ZY7aZmTXtqHTbsOPS1IGBKIwJ3NEf7/C158NGROU+kQZkOY6AqnbIUpVFtU42PvB9LSz+T0vhn79JfMCfj8yvDvSBW0JSueMcvPgI+220TPdoBnwi7xDMj9YOcPocD/mciyBs8Nq++gtleaiQ+AXYfrrTiXi/Fwn1VjaTk9oM=; X-YMail-OSG: iXmXT2QVM1lYZ4zy38JFP3Ul7K.iRUTr8mD1rNtBdsemaRI REoH.inqTyO3_.Vim_jSBJzGaLZtM6NGRIX24LxEY7GpDBQmZ9sNj93PD5wF kPTeDok1X0Vrtdj6_7vUg_8nz21zTMGxa4DAMrPCNDl4CCxMayqIl7YLtx8_ qbaMMBUWVFiMI4TBNW2fQOCCkPgvJYWiTnAEhnThfP4QgXNVkOIeDqTv3O8Z CjoIpdjZOb_1vQaBGXSUfK3QeFWIN8qA6zSrPA4x6Gej65Ruaf71M1zFaGss fYSJ6GOLksejTPjooCk_vXsL2OXiogJpcwmT5zGZmqKBKC8y5eoRn3.MRdEV Tn84Yny6yiuJsQqTaTw8yZTl7mY9MrVWGuFCgGmxuY056YHlE_9Yjow0gDm5 WJIftcwFaODveLlAA6Uox5aBnJTKUe86OfeY1gDx7myrVow47BGN5HBuIVwS xEZlJIguz7sLYqx5_ciqz7PWxB4P3YWX6THBUH18VUBFI5C9xOJ9t3T9dut3 qQ5MNlGmKcjEZh.fBgxIGiTSi45ordgL.Avsw1ZFQBPd1Mo1JRfxwTktyjHE .3pWXlGdK3bJHFchlyNsy3PmVBd89DrcdWgMcEPEF9PTEvh4ocajrgQ-- Received: from [65.49.68.188] by web121105.mail.ne1.yahoo.com via HTTP; Fri, 13 Sep 2013 21:56:01 PDT X-Rocket-MIMEInfo: 002.001, T2hoaGguLi4gRXhjdXNlIG1lClByZXZpb3VzbHkgdGhhbmtzIGZvciB5b3VyIHJlc3BvbnNlLiA6KQoKCk1laGRpCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KIEZyb206IG1laGRpIHNhYnpldmFyaSA8bWVoZGkuc2FiemV2YXJpQHlhaG9vLmNvbT4KVG86ICI2dHNjaEBpZXRmLm9yZyIgPDZ0c2NoQGlldGYub3JnPjsgInR3YXR0ZXluZUBnbWFpbC5jb20iIDx0d2F0dGV5bmVAZ21haWwuY29tPiAKU2VudDogU2F0dXJkYXksIFNlcHRlbWJlciAxNCwgMjAxMyA5OjE3IEFNClN1YmplY3Q6IFsBMAEBAQE- X-Mailer: YahooMailWebService/0.8.157.561 References: <1379134067.81607.YahooMailNeo@web121105.mail.ne1.yahoo.com> Message-ID: <1379134561.87069.YahooMailNeo@web121105.mail.ne1.yahoo.com> Date: Fri, 13 Sep 2013 21:56:01 -0700 (PDT) From: mehdi sabzevari To: "6tsch@ietf.org" <6tsch@ietf.org>, "twatteyne@gmail.com" In-Reply-To: <1379134067.81607.YahooMailNeo@web121105.mail.ne1.yahoo.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="1018116533-874094917-1379134561=:87069" Subject: Re: [6tsch] scheduling of cells X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: mehdi sabzevari List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 14 Sep 2013 04:56:09 -0000 --1018116533-874094917-1379134561=:87069 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Ohhhh... Excuse me=0APreviously thanks for your response. :)=0A=0A=0AMehdi= =0A=0A=0A________________________________=0A From: mehdi sabzevari =0ATo: "6tsch@ietf.org" <6tsch@ietf.org>; "twatteyne@gma= il.com" =0ASent: Saturday, September 14, 2013 9:17 AM= =0ASubject: [6tsch] scheduling of cells=0A =0A=0A=0AHi All=0AI have a quest= ion about scheduling of cell as shared/dedicated, Previously thanks for you= r request. :)=0A=A0What is the best time(place) for scheduling a cell as sh= ared/dedicated? Can it be scheduled by advertisement? or It should be sched= ule before communication of peers?=0A=0A=0ARegards=0AMehdi=0A=0A___________= ____________________________________=0A6tsch mailing list=0A6tsch@ietf.org= =0Ahttps://www.ietf.org/mailman/listinfo/6tsch --1018116533-874094917-1379134561=:87069 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
    Ohhhh... E= xcuse me
    Previously thanks for your response. :)

    Mehdi

    From: mehd= i sabzevari <mehdi.sabzevari@yahoo.com>
    To: "6tsch@ietf.org" <6tsch@ietf.org>; "twatt= eyne@gmail.com" <twatteyne@gmail.com>
    Sent: Saturday, September 14, 2013 9:17 AM
    Subject: [6tsch] scheduling of = cells

    Hi All
    I have a question about scheduling of = cell as shared/dedicated, Previously thanks for your request. :)
    =  What is the best time(place) for scheduling a cell as shared/dedicate= d? Can it be scheduled by advertisement? or It should be schedule before communication of peers?


    Regards
    Mehdi

    _______________________________________________
    6tsch mailing list
    = 6tsch@i= etf.org
    https://www.ietf.org/mailman/listinfo/6tsch


    --1018116533-874094917-1379134561=:87069-- From pthubert@cisco.com Sat Sep 14 06:01:34 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 920B721E809E for <6tsch@ietfa.amsl.com>; Sat, 14 Sep 2013 06:01:34 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -9.448 X-Spam-Level: X-Spam-Status: No, score=-9.448 tagged_above=-999 required=5 tests=[AWL=-1.150, BAYES_00=-2.599, HTML_MESSAGE=0.001, MANGLED_TRNFER=2.3, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id WzviFPrb97QN for <6tsch@ietfa.amsl.com>; Sat, 14 Sep 2013 06:01:29 -0700 (PDT) Received: from rcdn-iport-1.cisco.com (rcdn-iport-1.cisco.com [173.37.86.72]) by ietfa.amsl.com (Postfix) with ESMTP id 84CDE21E8093 for <6tsch@ietf.org>; Sat, 14 Sep 2013 06:01:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=10523; q=dns/txt; s=iport; t=1379163689; x=1380373289; h=from:to:subject:date:message-id:references:in-reply-to: mime-version; bh=dDtPNWzdf38RPW6RR2LPlesXjlRb+5hvB08YcL0jIxE=; b=QlDsmD+Rxc16fQeD0lzleueGPrhMjfnMR0S26oR4XInYpjWeNrNLTtZy +LcWDRCyjWy7faFvZpUroDIACA6HDH++BYHv/d9DBCBeVix39KSQ8l2O0 9cRKkjknvvSXy2aiXDIqrBWVkd9zSnRYPidmOTrYJPPymyrPgcPspbilI Y=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgkGADVdNFKtJXG9/2dsb2JhbABbgwc4rzCJXYg/gRwWbQeCJgEBBAx9AgEcJwQHMhQHCgIEE4gDDLo0j2IXAYMegQADiQCOe4EvkEWBZoE+ X-IronPort-AV: E=Sophos;i="4.90,903,1371081600"; d="scan'208,217";a="259536044" Received: from rcdn-core2-2.cisco.com ([173.37.113.189]) by rcdn-iport-1.cisco.com with ESMTP; 14 Sep 2013 13:01:28 +0000 Received: from xhc-aln-x06.cisco.com (xhc-aln-x06.cisco.com [173.36.12.80]) by rcdn-core2-2.cisco.com (8.14.5/8.14.5) with ESMTP id r8ED1SMM015744 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for <6tsch@ietf.org>; Sat, 14 Sep 2013 13:01:28 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-aln-x06.cisco.com ([173.36.12.80]) with mapi id 14.02.0318.004; Sat, 14 Sep 2013 08:01:28 -0500 From: "Pascal Thubert (pthubert)" To: "6tsch@ietf.org" <6tsch@ietf.org> Thread-Topic: Protocol Action: 'Concise Binary Object Representation (CBOR)' to Proposed Standard (draft-bormann-cbor-09.txt) Thread-Index: AQHOsM4jsEWL2l+2bUei5S5uDtQfFZnFM3D9 Date: Sat, 14 Sep 2013 13:01:27 +0000 Message-ID: References: <20130913221016.7912.75601.idtracker@ietfa.amsl.com> In-Reply-To: <20130913221016.7912.75601.idtracker@ietfa.amsl.com> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: multipart/alternative; boundary="_000_E150039302924C96B95E326F0CCCD6FAciscocom_" MIME-Version: 1.0 Subject: [6tsch] Fwd: Protocol Action: 'Concise Binary Object Representation (CBOR)' to Proposed Standard (draft-bormann-cbor-09.txt) X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 14 Sep 2013 13:01:34 -0000 --_000_E150039302924C96B95E326F0CCCD6FAciscocom_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable FYI Pascal D=E9but du message transf=E9r=E9 : Exp=E9diteur: The IESG > Date: 14 septembre 2013 00:10:16 UTC+02:00 Destinataire: IETF-Announce > Cc: RFC Editor = > Objet: Protocol Action: 'Concise Binary Object Representation (CBOR)' to Pr= oposed Standard (draft-bormann-cbor-09.txt) R=E9pondre =E0: > The IESG has approved the following document: - 'Concise Binary Object Representation (CBOR)' (draft-bormann-cbor-09.txt) as Proposed Standard This document has been reviewed in the IETF but is not the product of an IETF Working Group. The IESG contact person is Barry Leiba. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-bormann-cbor/ Technical Summary CBOR (Concise Binary Object Representation) is a new binary format for data structures. It is intended to be semantically similar to JSON, to be easy to encode and decode even in very constrained environments, to allow extensions without versioning, and to be reasonably compact. It is intended to provide a standard format that applications can use to exchange structured data, so the requested publication type is Proposed Standard. Review and Consensus The announcement of the -00 version on the appsawg list on 22 May provoked a blizzard of about 100 messages over the following three days. Several people asked whether the world needed yet another binary JSON format. The authors offered to add a discussion of other similar formats and how CBOR differs from them. A few people asked whether there should be a canonical version of CBOR. The authors explained why there isn't, but offered to add a discussion of how one might be defined as an extension. Others noted that all CBOR formats start with a length or count field, making streaming implementations difficult since they would have to buffer up potentially large amounts of data. After some back and forth, the authors offered to add chunked subformats and uncounted formats that use an end tag. One person noted that the discussion of translation to and from JSON said that CBOR bignums be translated to JSON integers, which would often lead to loss of precision in JSON implementations and suggested that the translation instead be to encoded binary data, to which the authors agreed. One other person expressed dissatisfaction with CBOR and sketched out the rudiments of an alternative, although he has not (as far as I can tell) further developed it. Nine people participated in the discussion. After the announcement of the -01 version on 29 May, there were about a dozen messages from the same people, generally positive and discussing minor technical issues. After the announcement of the -02 version later the same day, responding to that day's comments, there were no further messages, suggesting that the issues were handled to the satisfaction of the people in the discussion. There are at least four implementations, in Python, Ruby, Javascript, and Java. There are no outstanding technical issues. The end of section 7 has a TBD that should be deleted. During Last Call, the major issue involved whether it was appropriate to publish CBOR as Proposed Standard. Phillip Hallam-Baker opined that Experimental would be appropriate, and that for Proposed Standard it would be preferable to have a working group hash out the use cases and design criteria first, and agree on those before proposing one or mote standards. There was some support for this position, but no serious and reasoned objection, and in the end, consensus was clearly toward putting CBOR forth as a *Proposed Standard*, with the option of other proposals in future. Personnel The Responsible Area Director is Barry Leiba, and the Document Shepherd is John Levine --_000_E150039302924C96B95E326F0CCCD6FAciscocom_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
    FYI

    Pascal

    D=E9but du message transf=E9r=E9 :

    Exp=E9diteur: The IESG <iesg-secretary@ietf.org>
    Date: 14 septembre 2013 00:10:16 UTC+02:00
    Destinataire: IETF-Announce <ietf-announce@ietf.org>
    Cc: RFC Editor <rfc-= editor@rfc-editor.org>
    Objet: Protocol Action: 'Concise Binary Object Representation (CB= OR)' to Proposed Standard (draft-bormann-cbor-09.txt)
    R=E9pondre =E0: <ietf@ietf.org>

    The IESG has approved the following document:
    - 'Concise Binary Object Representation (CBOR)'
     (draft-bormann-cbor-09.txt) as Proposed Standard

    This document has been reviewed in the IETF but is not the product of= an
    IETF Working Group.

    The IESG contact person is Barry Leiba.

    A URL of this Internet Draft is:
    http:= //datatracker.ietf.org/doc/draft-bormann-cbor/




    Technical Summary

    CBOR (Concise Binary Object Representation) is a new binary format fo= r
    data structures.  It is intended to be semantically similar to J= SON,
    to be easy to encode and decode even in very constrained environments= ,
    to allow extensions without versioning, and to be reasonably compact.=
    It is intended to provide a standard format that applications can use=
    to exchange structured data, so the requested publication type is
    Proposed Standard.

    Review and Consensus

    The announcement of the -00 version on the appsawg list on 22 May
    provoked a blizzard of about 100 messages over the following three
    days.  Several people asked whether the world needed yet another=
    binary JSON format.  The authors offered to add a discussion of = other
    similar formats and how CBOR differs from them.  

    A few people asked whether there should be a canonical version of
    CBOR.  The authors explained why there isn't, but offered to add=
    a discussion of how one might be defined as an extension.

    Others noted that all CBOR formats start with a length or count field= ,
    making streaming implementations difficult since they would have to
    buffer up potentially large amounts of data.  After some back an= d
    forth, the authors offered to add chunked subformats and uncounted
    formats that use an end tag.

    One person noted that the discussion of translation to and from JSON<= /span>
    said that CBOR bignums be translated to JSON integers, which would
    often lead to loss of precision in JSON implementations and suggested=
    that the translation instead be to encoded binary data, to which the<= /span>
    authors agreed.  

    One other person expressed dissatisfaction with CBOR and sketched out=
    the rudiments of an alternative, although he has not (as far as I can=
    tell) further developed it.  Nine people participated in the
    discussion.

    After the announcement of the -01 version on 29 May, there were about=
    a dozen messages from the same people, generally positive and<= br> discussing minor technical issues.

    After the announcement of the -02 version later the same day,<= br> responding to that day's comments, there were no further messages,
    suggesting that the issues were handled to the satisfaction of the
    people in the discussion.

    There are at least four implementations, in Python, Ruby, Javascript,=
    and Java.

    There are no outstanding technical issues.  The end of section 7= has a
    TBD that should be deleted.

    During Last Call, the major issue involved whether it was appropriate= to
    publish CBOR as Proposed Standard.  Phillip Hallam-Baker opined = that
    Experimental would be appropriate, and that for Proposed Standard it = would
    be preferable to have a working group hash out the use cases and desi= gn
    criteria first, and agree on those before proposing one or mote stand= ards.
    There was some support for this position, but no serious and reasoned=
    objection, and in the end, consensus was clearly toward putting CBOR = forth
    as a *Proposed Standard*, with the option of other proposals in futur= e.

    Personnel

    The Responsible Area Director is Barry Leiba, and the Document=
    Shepherd is John Levine
    --_000_E150039302924C96B95E326F0CCCD6FAciscocom_-- From P.Zand@utwente.nl Sun Sep 15 17:57:23 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BE1D611E8176 for <6tsch@ietfa.amsl.com>; Sun, 15 Sep 2013 17:57:22 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 1.446 X-Spam-Level: * X-Spam-Status: No, score=1.446 tagged_above=-999 required=5 tests=[AWL=-0.650, BAYES_50=0.001, HELO_EQ_NL=0.55, HOST_EQ_NL=1.545] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HBFUJZTZA6mq for <6tsch@ietfa.amsl.com>; Sun, 15 Sep 2013 17:57:18 -0700 (PDT) Received: from EXEDGE02.ad.utwente.nl (exedge02.ad.utwente.nl [130.89.5.49]) by ietfa.amsl.com (Postfix) with ESMTP id E667811E80FF for <6tsch@ietf.org>; Sun, 15 Sep 2013 17:57:16 -0700 (PDT) Received: from EXHUB02.ad.utwente.nl (130.89.4.229) by EXEDGE02.ad.utwente.nl (130.89.5.49) with Microsoft SMTP Server (TLS) id 14.2.328.9; Mon, 16 Sep 2013 02:57:15 +0200 Received: from EXMBX23.ad.utwente.nl ([169.254.3.13]) by EXHUB02.ad.utwente.nl ([130.89.4.229]) with mapi id 14.02.0328.009; Mon, 16 Sep 2013 02:56:21 +0200 From: To: , Thread-Topic: [6tsch] report flow contents Thread-Index: AQHOqmeRdn+u8+L3JUGYWl1pnrYuVpm3azMAgAA2pACAAAP1gIABFasAgAAfWwCAAGmlgIABKJyAgAYvvkCAAA0/AIAAIEEAgAA8AMCAALlWkIABAAeAgADZmoCAAAnjAIAABn2AgAAFBgCAAAbNAIAALW+AgAAPi4CAA6eBIA== Date: Mon, 16 Sep 2013 00:56:18 +0000 Message-ID: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7DCCD@EXMBX23.ad.utwente.nl> References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [130.89.12.149] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Cc: watteyne@eecs.berkeley.edu, 6tsch@ietf.org Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Sep 2013 00:57:23 -0000 Hi Diego, ISA100.11a considers the adaptive channel hopping on a link-by-link basis, = in addition to traditional blacklisting on the whole network. This mechanis= m is described as following: "Additionally, a device may autonomously treat transmit links on problemati= c channels as idle, thus reducing unnecessary interference and wasted energ= y on channels with a history of poor connectivity. A device skipping links = in this manner should periodically test the links to verify that they remai= n problematic. Such selective channel utilization can be disabled by the sy= stem manager on a link-by-link basis, through the attribute dlmo.Link[].Typ= e.SelectiveAllowed. [1]" In this scheme, the sender/receiver consider the poor channel as idle. The = sender and receiver (on the poor edge) will still follow the defined hoppin= g pattern and they will not conflict with the rest of the network.=20 Potential Drawbacks: 1/16 of the resources might be wasted on that edge, bu= t the poor channel of that edge will be skipped, locally.=20 Important Strength: The overhead of this scheme is low. Best wishes, puoria 1. IEC 62734: Industrial communication networks - Fieldbus specifications -= Wireless systems for industrial automation: process control and related ap= plications - ISA100.11a. -----Original Message----- From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of P= rof. Diego Dujovne Sent: Friday, September 13, 2013 9:07 PM To: Qin Wang Cc: Thomas Watteyne; 6TSCH Subject: Re: [6tsch] report flow contents Hi Qin, On the centralized case, changing the channel hopping sequence (a= nd thus blacklisting the channels with interference) on the whole network, = and not in a peer basis is not efficient in terms of channel usage. Let me = explain this with an example: Let's say there is are 4 nodes: A, B, C and D. A and B are interfered only = on channel 4 by an external source, while C and D listen interference only = on channel 8. If I disable channel 4 and 8 by blacklisting both channels fr= om the hopping sequence, A and B won't be able to use channel 8 and C and D= won't be able to use channel 4, both interference free between them. On the distributed case, if two nodes are already connected and if both det= ect a interfered channel they will (someway) agree to blacklist that channe= l from the hopping sequence. But we have not arrived to this case yet on 6T= iSCH. On the other side, if we blacklist by changing the hopping sequence, a node= talking to different neighbours will have different channel hopping sequen= ces. And this increases complexity too. I don't have an answer (just questions) on how to reduce the probability of= using an interfered channel, but it seems that the current tsch scheme doe= s not allow a simple way to blacklist channels unless it is done network-wi= de. To sum up, I'm worrying about reducing channel diversity. Thoughts? Diego 2013/9/13 Qin Wang : > Hi Diego, > > I understand, theoretically, dynamic allocation may have some=20 > advantages in terms of increasing reliability. But, in the channel=20 > hopping network, it is challenge for a node to catch up the channel=20 > hopping sequence change in its neighbors. Thus, I think, if updating=20 > channel hopping sequence, it could be better to do it in network wide. Wh= at do you think? > > Thanks > Qin > > > On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne=20 > wrote: >> >> Qin, >> I think frequency blacklisting on a node-pair basis (either=20 >> centralized or distributed) would break the schedule matrix=20 >> structure, which overrides narrowband interference by channel=20 >> hopping. >> If frequencies are blacklisted on all slots, that would waste=20 >> resources. Narrowband interference can harm the link locally, but the=20 >> same frequency may be interference-free in other parts of the net. >> The dynamic allocation I propose was only an example. If you=20 >> have 16 frequencies and 2 of them have interference, and the channel=20 >> offset is sequential, you may loose 2 packets every 16. Am I right on=20 >> this? >> >> Thoughts? >> >> Diego >> >> >> 2013/9/13 Qin Wang : >> > Thomas, >> > >> > I agree with you that it is not clear what is the advantage and=20 >> > disadvantage of adaptive channel hopping in reality. >> > >> > In mind, based on the per-frequency report, PCE can do two things:=20 >> > (1) update channel hopping sequence is a frequency is really bad=20 >> > network wide; >> > (2) avoid use some bad channel when it runs cell allocation algorithm. >> > The >> > two things happen in PCE, so, will not make negative impact on the=20 >> > network. >> > Thought? >> > >> > Thanks >> > >> > Qin >> > >> > >> > >> > >> > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne=20 >> > wrote: >> >> >> >> Qin, Diego, >> >> >> >> My 2 cents. I agree with you that it would be nice for the PCE to=20 >> >> be able to get some per-channel information. Although adaptive=20 >> >> channel hopping (i.e. >> >> selectively blacklisting frequencies for a specific bundle) is=20 >> >> appealing in principle, it's unclear (at least to me) whether the=20 >> >> gains clearly outweigh the overhead (complexity, signalign=20 >> >> traffic) one has to pay to coordinate this [1-5]. >> >> >> >> My opinion is that we should enable both metrics averages over all=20 >> >> channels, and per-channel metrics. In some configurations, one can=20 >> >> imagine gathering the former by default, and querying for the=20 >> >> latter on specific occasions. Having the option of gathering=20 >> >> per-channel information does enable us to be future-proof against=20 >> >> future adaptive channel hopping algorithm. >> >> >> >> For sure, this makes for a great question: how do a pair of motes=20 >> >> and the PCE have to communicate to enable adaptive channel hopping=20 >> >> on that link? The answer to that might directly impact the=20 >> >> application payload formats we have are talking about. Is this=20 >> >> something you be interested in looking further into? >> >> >> >> Thomas >> >> >> >> [1] A Decentralized Scheduling Algorithm for Time Synchronized=20 >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Alexandr= e M. >> >> Bayen. >> >> ICST Transactions on Mobile Communications and Applications, 11(7-9). >> >> European Union Digital Library link. >> >> doi:10.4108/icst.trans.mca.2011.e5. >> >> September 2011. >> >> [2] A Decentralized Scheduling Algorithm for Time Synchronized=20 >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister.=20 >> >> International Conference on Ad Hoc Networks (ADHOCNETS), Victoria,=20 >> >> BC, Canada, 18-20 August 2010. >> >> [3] Mitigating Multipath Fading Through Channel Hopping in=20 >> >> Wireless Sensor Networks. Thomas Watteyne, Steven Lanzisera, Ankur=20 >> >> Mehta, Kris Pister. >> >> IEEE >> >> International Conference on Communications (ICC), Cape Town, South=20 >> >> Africa, >> >> 23-27 May, 2010. >> >> [4] Feasibility Analysis of Controller Design for Adaptive Channel=20 >> >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven=20 >> >> Glaser, Kris Pister. First International Workshop on Performance=20 >> >> Methodologies and Tools for Wireless Sensor Networks (WSNPerf),=20 >> >> Pisa, Italy, 23 October 2009. >> >> [5] Reliability Through Frequency Diversity: Why Channel Hopping=20 >> >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM=20 >> >> International Symposium on Performance Evaluation of Wireless Ad=20 >> >> Hoc, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife, Canary=20 >> >> Islands, Spain, 26-30 October 2009. >> >> >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne=20 >> >> wrote: >> >>> >> >>> Hello Qin, >> >>> I think that a per-frequency report will help the=20 >> >>> PCE to decide which frequency to use, and maybe temporarily=20 >> >>> black-list them. For example, a dynamic scheme may include=20 >> >>> sampling the blacklisted frequencies every X minutes to re-enable=20 >> >>> them once the interference has disappeared. >> >>> This will require the node to refresh the RSSI and=20 >> >>> LQI values in a opportunistic way (every time the a cell uses=20 >> >>> that frequency) to save energy. >> >>> >> >>> Any thoughts? >> >>> >> >>> Diego >> >> >> >> >> >> _______________________________________________ >> >> 6tsch mailing list >> >> 6tsch@ietf.org >> >> https://www.ietf.org/mailman/listinfo/6tsch >> >> >> > >> > >> > _______________________________________________ >> > 6tsch mailing list >> > 6tsch@ietf.org >> > https://www.ietf.org/mailman/listinfo/6tsch >> > >> >> >> >> -- >> DIEGO DUJOVNE >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicacione= s=20 >> Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl >> (56 2) 676 8125 > > --=20 DIEGO DUJOVNE Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl (56 2) 676 8125 _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch From qinwang@berkeley.edu Mon Sep 16 07:34:54 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0E58111E8273 for <6tsch@ietfa.amsl.com>; Mon, 16 Sep 2013 07:34:54 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.297 X-Spam-Level: X-Spam-Status: No, score=-1.297 tagged_above=-999 required=5 tests=[AWL=-0.921, BAYES_50=0.001, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id iWHm9a8yXMTm for <6tsch@ietfa.amsl.com>; Mon, 16 Sep 2013 07:34:49 -0700 (PDT) Received: from mail-ie0-f179.google.com (mail-ie0-f179.google.com [209.85.223.179]) by ietfa.amsl.com (Postfix) with ESMTP id B5ABB11E827C for <6tsch@ietf.org>; Mon, 16 Sep 2013 07:34:49 -0700 (PDT) Received: by mail-ie0-f179.google.com with SMTP id e14so7487538iej.38 for <6tsch@ietf.org>; Mon, 16 Sep 2013 07:34:49 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=ZhcdnIRDE+umhljultL2qcafGBzUDO9Y7o/oitcKpb0=; b=RZ1bZts/4Ny/8cz9vi4HKz5kYa+Grb6pOwDK7+Fx3ujfr9a7nQBzJqovVUi165QMtv Kzn8Lz09ASBm/VdpO8QU+eUAKK366AAJPWGB34VkV2iIiBtx7BevkAwi5Tkt7LNZkvZy GncYAx9fVafbimakpi0ymEiOkHDf7SSUdALtTtNRL95d7GrrfCTjhPx+lOp/jlf9k3UV 6I58tlPXsMVvujBMuTBpQ2J/v93sL0lvuuRxXbHYt7jd1TaBzwNWFoflCYiPZ3i3KQrc 8W/FL/G0E2fIgo+gQBMDw0qrQWitPBAfl8wLrDDsw3QgshYR/weXj2hGDTXZliLPLbzi N7Tg== X-Gm-Message-State: ALoCoQkEz9eramLFYecpk+3ScYSjK6Vl3TcfSdOjC/woGlBl4z/o0EgXmYjv1xImxMLVBEsIGOZf MIME-Version: 1.0 X-Received: by 10.50.43.170 with SMTP id x10mr6410736igl.45.1379342088204; Mon, 16 Sep 2013 07:34:48 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Mon, 16 Sep 2013 07:34:47 -0700 (PDT) In-Reply-To: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7DCCD@EXMBX23.ad.utwente.nl> References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7DCCD@EXMBX23.ad.utwente.nl> Date: Mon, 16 Sep 2013 22:34:47 +0800 Message-ID: From: Qin Wang To: "P.Zand@utwente.nl" Content-Type: multipart/alternative; boundary=089e01176cad310fb504e6811bb4 Cc: Thomas Watteyne , "6tsch@ietf.org" <6tsch@ietf.org>, "Prof. Diego Dujovne" Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Sep 2013 14:34:54 -0000 --089e01176cad310fb504e6811bb4 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi Pouria and Diego, I think the "link-by-link" adaptive channel hopping mechanism of ISA100.11a AND cell over-provision mechanism of 6top can be used together. Make sense? Thanks Qin On Mon, Sep 16, 2013 at 8:56 AM, wrote: > Hi Diego, > > ISA100.11a considers the adaptive channel hopping on a link-by-link basis= , > in addition to traditional blacklisting on the whole network. This > mechanism is described as following: > > "Additionally, a device may autonomously treat transmit links on > problematic channels as idle, thus reducing unnecessary interference and > wasted energy on channels with a history of poor connectivity. A device > skipping links in this manner should periodically test the links to verif= y > that they remain problematic. Such selective channel utilization can be > disabled by the system manager on a link-by-link basis, through the > attribute dlmo.Link[].Type.SelectiveAllowed. [1]" > > In this scheme, the sender/receiver consider the poor channel as idle. Th= e > sender and receiver (on the poor edge) will still follow the defined > hopping pattern and they will not conflict with the rest of the network. > Potential Drawbacks: 1/16 of the resources might be wasted on that edge, > but the poor channel of that edge will be skipped, locally. > Important Strength: The overhead of this scheme is low. > > Best wishes, > puoria > > 1. IEC 62734: Industrial communication networks - Fieldbus specifications > - Wireless systems for industrial automation: process control and related > applications - ISA100.11a. > > -----Original Message----- > From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of > Prof. Diego Dujovne > Sent: Friday, September 13, 2013 9:07 PM > To: Qin Wang > Cc: Thomas Watteyne; 6TSCH > Subject: Re: [6tsch] report flow contents > > Hi Qin, > On the centralized case, changing the channel hopping sequence > (and thus blacklisting the channels with interference) on the whole > network, and not in a peer basis is not efficient in terms of channel > usage. Let me explain this with an > example: > > Let's say there is are 4 nodes: A, B, C and D. A and B are interfered onl= y > on channel 4 by an external source, while C and D listen interference onl= y > on channel 8. If I disable channel 4 and 8 by blacklisting both channels > from the hopping sequence, A and B won't be able to use channel 8 and C a= nd > D won't be able to use channel 4, both interference free between them. > > On the distributed case, if two nodes are already connected and if both > detect a interfered channel they will (someway) agree to blacklist that > channel from the hopping sequence. But we have not arrived to this case y= et > on 6TiSCH. > > On the other side, if we blacklist by changing the hopping sequence, a > node talking to different neighbours will have different channel hopping > sequences. And this increases complexity too. > > I don't have an answer (just questions) on how to reduce the probability > of using an interfered channel, but it seems that the current tsch scheme > does not allow a simple way to blacklist channels unless it is done > network-wide. To sum up, I'm worrying about reducing channel diversity. > > Thoughts? > > Diego > > > > > > > 2013/9/13 Qin Wang : > > Hi Diego, > > > > I understand, theoretically, dynamic allocation may have some > > advantages in terms of increasing reliability. But, in the channel > > hopping network, it is challenge for a node to catch up the channel > > hopping sequence change in its neighbors. Thus, I think, if updating > > channel hopping sequence, it could be better to do it in network wide. > What do you think? > > > > Thanks > > Qin > > > > > > On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne > > wrote: > >> > >> Qin, > >> I think frequency blacklisting on a node-pair basis (either > >> centralized or distributed) would break the schedule matrix > >> structure, which overrides narrowband interference by channel > >> hopping. > >> If frequencies are blacklisted on all slots, that would waste > >> resources. Narrowband interference can harm the link locally, but the > >> same frequency may be interference-free in other parts of the net. > >> The dynamic allocation I propose was only an example. If you > >> have 16 frequencies and 2 of them have interference, and the channel > >> offset is sequential, you may loose 2 packets every 16. Am I right on > >> this? > >> > >> Thoughts? > >> > >> Diego > >> > >> > >> 2013/9/13 Qin Wang : > >> > Thomas, > >> > > >> > I agree with you that it is not clear what is the advantage and > >> > disadvantage of adaptive channel hopping in reality. > >> > > >> > In mind, based on the per-frequency report, PCE can do two things: > >> > (1) update channel hopping sequence is a frequency is really bad > >> > network wide; > >> > (2) avoid use some bad channel when it runs cell allocation algorith= m. > >> > The > >> > two things happen in PCE, so, will not make negative impact on the > >> > network. > >> > Thought? > >> > > >> > Thanks > >> > > >> > Qin > >> > > >> > > >> > > >> > > >> > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne > >> > wrote: > >> >> > >> >> Qin, Diego, > >> >> > >> >> My 2 cents. I agree with you that it would be nice for the PCE to > >> >> be able to get some per-channel information. Although adaptive > >> >> channel hopping (i.e. > >> >> selectively blacklisting frequencies for a specific bundle) is > >> >> appealing in principle, it's unclear (at least to me) whether the > >> >> gains clearly outweigh the overhead (complexity, signalign > >> >> traffic) one has to pay to coordinate this [1-5]. > >> >> > >> >> My opinion is that we should enable both metrics averages over all > >> >> channels, and per-channel metrics. In some configurations, one can > >> >> imagine gathering the former by default, and querying for the > >> >> latter on specific occasions. Having the option of gathering > >> >> per-channel information does enable us to be future-proof against > >> >> future adaptive channel hopping algorithm. > >> >> > >> >> For sure, this makes for a great question: how do a pair of motes > >> >> and the PCE have to communicate to enable adaptive channel hopping > >> >> on that link? The answer to that might directly impact the > >> >> application payload formats we have are talking about. Is this > >> >> something you be interested in looking further into? > >> >> > >> >> Thomas > >> >> > >> >> [1] A Decentralized Scheduling Algorithm for Time Synchronized > >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, > Alexandre M. > >> >> Bayen. > >> >> ICST Transactions on Mobile Communications and Applications, 11(7-9= ). > >> >> European Union Digital Library link. > >> >> doi:10.4108/icst.trans.mca.2011.e5. > >> >> September 2011. > >> >> [2] A Decentralized Scheduling Algorithm for Time Synchronized > >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister. > >> >> International Conference on Ad Hoc Networks (ADHOCNETS), Victoria, > >> >> BC, Canada, 18-20 August 2010. > >> >> [3] Mitigating Multipath Fading Through Channel Hopping in > >> >> Wireless Sensor Networks. Thomas Watteyne, Steven Lanzisera, Ankur > >> >> Mehta, Kris Pister. > >> >> IEEE > >> >> International Conference on Communications (ICC), Cape Town, South > >> >> Africa, > >> >> 23-27 May, 2010. > >> >> [4] Feasibility Analysis of Controller Design for Adaptive Channel > >> >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven > >> >> Glaser, Kris Pister. First International Workshop on Performance > >> >> Methodologies and Tools for Wireless Sensor Networks (WSNPerf), > >> >> Pisa, Italy, 23 October 2009. > >> >> [5] Reliability Through Frequency Diversity: Why Channel Hopping > >> >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM > >> >> International Symposium on Performance Evaluation of Wireless Ad > >> >> Hoc, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife, Canary > >> >> Islands, Spain, 26-30 October 2009. > >> >> > >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne > >> >> wrote: > >> >>> > >> >>> Hello Qin, > >> >>> I think that a per-frequency report will help the > >> >>> PCE to decide which frequency to use, and maybe temporarily > >> >>> black-list them. For example, a dynamic scheme may include > >> >>> sampling the blacklisted frequencies every X minutes to re-enable > >> >>> them once the interference has disappeared. > >> >>> This will require the node to refresh the RSSI and > >> >>> LQI values in a opportunistic way (every time the a cell uses > >> >>> that frequency) to save energy. > >> >>> > >> >>> Any thoughts? > >> >>> > >> >>> Diego > >> >> > >> >> > >> >> _______________________________________________ > >> >> 6tsch mailing list > >> >> 6tsch@ietf.org > >> >> https://www.ietf.org/mailman/listinfo/6tsch > >> >> > >> > > >> > > >> > _______________________________________________ > >> > 6tsch mailing list > >> > 6tsch@ietf.org > >> > https://www.ietf.org/mailman/listinfo/6tsch > >> > > >> > >> > >> > >> -- > >> DIEGO DUJOVNE > >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicacio= nes > >> Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl > >> (56 2) 676 8125 > > > > > > > > -- > DIEGO DUJOVNE > Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones > Facultad de Ingenier=EDa UDP > www.ingenieria.udp.cl > (56 2) 676 8125 > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > --089e01176cad310fb504e6811bb4 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Hi Pouria and Diego,

    I think the "= link-by-link" adaptive channel hopping mechanism of ISA100.11a AND cel= l over-provision mechanism of 6top can be used together. Make sense?

    Thanks
    Qin


    On Mon, Sep 16, 2013 at 8:56 AM, <= P.Zand@utwente.nl> wrote:
    Hi Diego,

    ISA100.11a considers the adaptive channel hopping on a link-by-link basis, = in addition to traditional blacklisting on the whole network. This mechanis= m is described as following:

    "Additionally, a device may autonomously treat transmit links on probl= ematic channels as idle, thus reducing unnecessary interference and wasted = energy on channels with a history of poor connectivity. A device skipping l= inks in this manner should periodically test the links to verify that they = remain problematic. Such selective channel utilization can be disabled by t= he system manager on a link-by-link basis, through the attribute dlmo.Link[= ].Type.SelectiveAllowed. [1]"

    In this scheme, the sender/receiver consider the poor channel as idle. The = sender and receiver (on the poor edge) will still follow the defined hoppin= g pattern and they will not conflict with the rest of the network.
    Potential Drawbacks: 1/16 of the resources might be wasted on that edge, bu= t the poor channel of that edge will be skipped, locally.
    Important Strength: The overhead of this scheme is low.

    Best wishes,
    puoria

    1. IEC 62734: Industrial communication networks - Fieldbus specifications -= Wireless systems for industrial automation: process control and related ap= plications - ISA100.11a.

    -----Original Message-----
    From: 6tsch-bounces@ietf.org = [mailto:6tsch-bounces@ietf.org] On Behalf Of Prof. Diego Dujovne
    Sent: Friday, September 13, 2013 9:07 PM
    To: Qin Wang
    Cc: Thomas Watteyne; 6TSCH
    Subject: Re: [6tsch] report flow contents

    Hi Qin,
    =A0 =A0 =A0 =A0 =A0 On the centralized case, changing the channel hopping s= equence (and thus blacklisting the channels with interference) on the whole= network, and not in a peer basis is not efficient in terms of channel usag= e. Let me explain this with an
    example:

    Let's say there is are 4 nodes: A, B, C and D. A and B are interfered o= nly on channel 4 by an external source, while C and D listen interference o= nly on channel 8. If I disable channel 4 and 8 by blacklisting both channel= s from the hopping sequence, A and B won't be able to use channel 8 and= C and D won't be able to use channel 4, both interference free between= them.

    On the distributed case, if two nodes are already connected and if both det= ect a interfered channel they will (someway) agree to blacklist that channe= l from the hopping sequence. But we have not arrived to this case yet on 6T= iSCH.

    On the other side, if we blacklist by changing the hopping sequence, a node= talking to different neighbours will have different channel hopping sequen= ces. And this increases complexity too.

    I don't have an answer (just questions) on how to reduce the probabilit= y of using an interfered channel, but it seems that the current tsch scheme= does not allow a simple way to blacklist channels unless it is done networ= k-wide. To sum up, I'm worrying about reducing channel diversity.

    Thoughts?

    =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0Diego






    2013/9/13 Qin Wang <    qinwang@berk= eley.edu>:
    > Hi Diego,
    >
    > I understand, theoretically, dynamic allocation may have some
    > advantages in terms of increasing reliability. But, in the channel
    > hopping network, it is challenge for a node to catch up the channel > hopping sequence change in its neighbors. Thus, I think, if updating > channel hopping sequence, it could be better to do it in network wide.= What do you think?
    >
    > Thanks
    > Qin
    >
    >
    > On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne
    > <diego.dujovne@mail.ud= p.cl> wrote:
    >>
    >> Qin,
    >> =A0 =A0 =A0 I think frequency blacklisting on a node-pair basis (e= ither
    >> centralized or distributed) would break the schedule matrix
    >> structure, which overrides narrowband interference by channel
    >> hopping.
    >> If frequencies are blacklisted on all slots, that would waste
    >> resources. Narrowband interference can harm the link locally, but = the
    >> same frequency may be interference-free in other parts of the net.=
    >> =A0 =A0 =A0 The dynamic allocation I propose was only an example. = If you
    >> have 16 frequencies and 2 of them have interference, and the chann= el
    >> offset is sequential, you may loose 2 packets every 16. Am I right= on
    >> this?
    >>
    >> Thoughts?
    >>
    >> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Diego
    >>
    >>
    >> 2013/9/13 Qin Wang <qin= wang@berkeley.edu>:
    >> > Thomas,
    >> >
    >> > I agree with you that it is not clear what is the advantage a= nd
    >> > disadvantage of adaptive channel hopping in reality.
    >> >
    >> > In mind, based on the per-frequency report, PCE can do two th= ings:
    >> > (1) update channel hopping sequence is a frequency is really = bad
    >> > network wide;
    >> > (2) avoid use some bad channel when it runs cell allocation a= lgorithm.
    >> > The
    >> > two things happen in PCE, so, will not make negative impact o= n the
    >> > network.
    >> > Thought?
    >> >
    >> > Thanks
    >> >
    >> > Qin
    >> >
    >> >
    >> >
    >> >
    >> > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne
    >> > <watteyne@ee= cs.berkeley.edu> wrote:
    >> >>
    >> >> Qin, Diego,
    >> >>
    >> >> My 2 cents. I agree with you that it would be nice for th= e PCE to
    >> >> be able to get some per-channel information. Although ada= ptive
    >> >> channel hopping (i.e.
    >> >> selectively blacklisting frequencies for a specific bundl= e) is
    >> >> appealing in principle, it's unclear (at least to me)= whether the
    >> >> gains clearly outweigh the overhead (complexity, signalig= n
    >> >> traffic) one has to pay to coordinate this [1-5].
    >> >>
    >> >> My opinion is that we should enable both metrics averages= over all
    >> >> channels, and per-channel metrics. In some configurations= , one can
    >> >> imagine gathering the former by default, and querying for= the
    >> >> latter on specific occasions. Having the option of gather= ing
    >> >> per-channel information does enable us to be future-proof= against
    >> >> future adaptive channel hopping algorithm.
    >> >>
    >> >> For sure, this makes for a great question: how do a pair = of motes
    >> >> and the PCE have to communicate to enable adaptive channe= l hopping
    >> >> on that link? The answer to that might directly impact th= e
    >> >> application payload formats we have are talking about. Is= this
    >> >> something you be interested in looking further into?
    >> >>
    >> >> Thomas
    >> >>
    >> >> [1] A Decentralized Scheduling Algorithm for Time Synchro= nized
    >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pist= er, Alexandre M.
    >> >> Bayen.
    >> >> ICST Transactions on Mobile Communications and Applicatio= ns, 11(7-9).
    >> >> European Union Digital Library link.
    >> >> doi:10.4108/icst.trans.mca.2011.e5.
    >> >> September 2011.
    >> >> [2] A Decentralized Scheduling Algorithm for Time Synchro= nized
    >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pist= er.
    >> >> International Conference on Ad Hoc Networks (ADHOCNETS), = Victoria,
    >> >> BC, Canada, 18-20 August 2010.
    >> >> [3] Mitigating Multipath Fading Through Channel Hopping i= n
    >> >> Wireless Sensor Networks. Thomas Watteyne, Steven Lanzise= ra, Ankur
    >> >> Mehta, Kris Pister.
    >> >> IEEE
    >> >> International Conference on Communications (ICC), Cape To= wn, South
    >> >> Africa,
    >> >> 23-27 May, 2010.
    >> >> [4] Feasibility Analysis of Controller Design for Adaptiv= e Channel
    >> >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco,= Steven
    >> >> Glaser, Kris Pister. First International Workshop on Perf= ormance
    >> >> Methodologies and Tools for Wireless Sensor Networks (WSN= Perf),
    >> >> Pisa, Italy, 23 October 2009.
    >> >> [5] Reliability Through Frequency Diversity: Why Channel = Hopping
    >> >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. S= ixth ACM
    >> >> International Symposium on Performance Evaluation of Wire= less Ad
    >> >> Hoc, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife= , Canary
    >> >> Islands, Spain, 26-30 October 2009.
    >> >>
    >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne
    >> >> <diego.du= jovne@mail.udp.cl> wrote:
    >> >>>
    >> >>> Hello Qin,
    >> >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 I think that a per-freque= ncy report will help the
    >> >>> PCE to decide which frequency to use, and maybe tempo= rarily
    >> >>> black-list them. For example, a dynamic scheme may in= clude
    >> >>> sampling the blacklisted frequencies every X minutes = to re-enable
    >> >>> them once the interference has disappeared.
    >> >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0This will require the node= to refresh the RSSI and
    >> >>> LQI values in a opportunistic way (every time the a c= ell uses
    >> >>> that frequency) to save energy.
    >> >>>
    >> >>> Any thoughts?
    >> >>>
    >> >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 Diego
    >> >>
    >> >>
    >> >> _______________________________________________
    >> >> 6tsch mailing list
    >> >> 6tsch@ietf.org
    >> >> https://www.ietf.org/mailman/listinfo/6tsch
    >> >>
    >> >
    >> >
    >> > _______________________________________________
    >> > 6tsch mailing list
    >> > 6tsch@ietf.org
    >> > https://www.ietf.org/mailman/listinfo/6tsch
    >> >
    >>
    >>
    >>
    >> --
    >> DIEGO DUJOVNE
    >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunic= aciones
    >> Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl
    >> (56 2) 676 8125
    >
    >



    --
    DIEGO DUJOVNE
    Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP
    www.ingenieria.u= dp.cl
    (56 2) 676 8125
    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch

    --089e01176cad310fb504e6811bb4-- From P.Zand@utwente.nl Mon Sep 16 09:35:38 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 02BD211E8280 for <6tsch@ietfa.amsl.com>; Mon, 16 Sep 2013 09:35:38 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.363 X-Spam-Level: X-Spam-Status: No, score=0.363 tagged_above=-999 required=5 tests=[AWL=0.866, BAYES_00=-2.599, HELO_EQ_NL=0.55, HOST_EQ_NL=1.545, HTML_MESSAGE=0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 1JI95Z9EwhgH for <6tsch@ietfa.amsl.com>; Mon, 16 Sep 2013 09:35:33 -0700 (PDT) Received: from EXEDGE02.ad.utwente.nl (exedge02.ad.utwente.nl [130.89.5.49]) by ietfa.amsl.com (Postfix) with ESMTP id 5A02111E82A8 for <6tsch@ietf.org>; Mon, 16 Sep 2013 09:35:30 -0700 (PDT) Received: from EXHUB02.ad.utwente.nl (130.89.4.229) by EXEDGE02.ad.utwente.nl (130.89.5.49) with Microsoft SMTP Server (TLS) id 14.2.328.9; Mon, 16 Sep 2013 18:35:28 +0200 Received: from EXMBX23.ad.utwente.nl ([169.254.3.13]) by EXHUB02.ad.utwente.nl ([130.89.4.229]) with mapi id 14.02.0328.009; Mon, 16 Sep 2013 18:35:28 +0200 From: To: Thread-Topic: [6tsch] report flow contents Thread-Index: AQHOqmeRdn+u8+L3JUGYWl1pnrYuVpm3azMAgAA2pACAAAP1gIABFasAgAAfWwCAAGmlgIABKJyAgAYvvkCAAA0/AIAAIEEAgAA8AMCAALlWkIABAAeAgADZmoCAAAnjAIAABn2AgAAFBgCAAAbNAIAALW+AgAAPi4CAA6eBIIAAw3yAgABDP2Q= Date: Mon, 16 Sep 2013 16:35:27 +0000 Message-ID: <5B322D97-6941-4886-98B0-48964CF3DB2C@utwente.nl> References: <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7B88C@EXMBX23.ad.utwente.nl> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7BC47@EXMBX23.ad.utwente.nl> <52316e72.c7380f0a.73cf.ffffc7a5@mx.google.com> <76EA352C3C95BB42A2C4F2EE6493AD6E4DA7DCCD@EXMBX23.ad.utwente.nl>, In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: multipart/alternative; boundary="_000_5B322D976941488698B048964CF3DB2Cutwentenl_" MIME-Version: 1.0 Cc: watteyne@eecs.berkeley.edu, 6tsch@ietf.org, diego.dujovne@mail.udp.cl Subject: Re: [6tsch] report flow contents X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Sep 2013 16:35:38 -0000 --_000_5B322D976941488698B048964CF3DB2Cutwentenl_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Qin, "Link-by-link" adaptive channel hopping in ISA is used by a node to select = the best frequencies for its further communication with its particular neig= hbor. And, cell over-provision (i.e. the combination of "channel offset" and "slo= t" info used for communication with a particular neighbor), might be used f= or evaluating the internal interference and BW requirements between two nei= ghbors. Am I right? Best wishes, Pouria Zand On Sep 16, 2013, at 4:34 PM, "Qin Wang" > wrote: Hi Pouria and Diego, I think the "link-by-link" adaptive channel hopping mechanism of ISA100.11a= AND cell over-provision mechanism of 6top can be used together. Make sense= ? Thanks Qin On Mon, Sep 16, 2013 at 8:56 AM, > wrote: Hi Diego, ISA100.11a considers the adaptive channel hopping on a link-by-link basis, = in addition to traditional blacklisting on the whole network. This mechanis= m is described as following: "Additionally, a device may autonomously treat transmit links on problemati= c channels as idle, thus reducing unnecessary interference and wasted energ= y on channels with a history of poor connectivity. A device skipping links = in this manner should periodically test the links to verify that they remai= n problematic. Such selective channel utilization can be disabled by the sy= stem manager on a link-by-link basis, through the attribute dlmo.Link[].Typ= e.SelectiveAllowed. [1]" In this scheme, the sender/receiver consider the poor channel as idle. The = sender and receiver (on the poor edge) will still follow the defined hoppin= g pattern and they will not conflict with the rest of the network. Potential Drawbacks: 1/16 of the resources might be wasted on that edge, bu= t the poor channel of that edge will be skipped, locally. Important Strength: The overhead of this scheme is low. Best wishes, puoria 1. IEC 62734: Industrial communication networks - Fieldbus specifications -= Wireless systems for industrial automation: process control and related ap= plications - ISA100.11a. -----Original Message----- From: 6tsch-bounces@ietf.org [mailto:6tsch-b= ounces@ietf.org] On Behalf Of Prof. Diego Du= jovne Sent: Friday, September 13, 2013 9:07 PM To: Qin Wang Cc: Thomas Watteyne; 6TSCH Subject: Re: [6tsch] report flow contents Hi Qin, On the centralized case, changing the channel hopping sequence (a= nd thus blacklisting the channels with interference) on the whole network, = and not in a peer basis is not efficient in terms of channel usage. Let me = explain this with an example: Let's say there is are 4 nodes: A, B, C and D. A and B are interfered only = on channel 4 by an external source, while C and D listen interference only = on channel 8. If I disable channel 4 and 8 by blacklisting both channels fr= om the hopping sequence, A and B won't be able to use channel 8 and C and D= won't be able to use channel 4, both interference free between them. On the distributed case, if two nodes are already connected and if both det= ect a interfered channel they will (someway) agree to blacklist that channe= l from the hopping sequence. But we have not arrived to this case yet on 6T= iSCH. On the other side, if we blacklist by changing the hopping sequence, a node= talking to different neighbours will have different channel hopping sequen= ces. And this increases complexity too. I don't have an answer (just questions) on how to reduce the probability of= using an interfered channel, but it seems that the current tsch scheme doe= s not allow a simple way to blacklist channels unless it is done network-wi= de. To sum up, I'm worrying about reducing channel diversity. Thoughts? Diego 2013/9/13 Qin Wang >: > Hi Diego, > > I understand, theoretically, dynamic allocation may have some > advantages in terms of increasing reliability. But, in the channel > hopping network, it is challenge for a node to catch up the channel > hopping sequence change in its neighbors. Thus, I think, if updating > channel hopping sequence, it could be better to do it in network wide. Wh= at do you think? > > Thanks > Qin > > > On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne > > wrote: >> >> Qin, >> I think frequency blacklisting on a node-pair basis (either >> centralized or distributed) would break the schedule matrix >> structure, which overrides narrowband interference by channel >> hopping. >> If frequencies are blacklisted on all slots, that would waste >> resources. Narrowband interference can harm the link locally, but the >> same frequency may be interference-free in other parts of the net. >> The dynamic allocation I propose was only an example. If you >> have 16 frequencies and 2 of them have interference, and the channel >> offset is sequential, you may loose 2 packets every 16. Am I right on >> this? >> >> Thoughts? >> >> Diego >> >> >> 2013/9/13 Qin Wang >: >> > Thomas, >> > >> > I agree with you that it is not clear what is the advantage and >> > disadvantage of adaptive channel hopping in reality. >> > >> > In mind, based on the per-frequency report, PCE can do two things: >> > (1) update channel hopping sequence is a frequency is really bad >> > network wide; >> > (2) avoid use some bad channel when it runs cell allocation algorithm. >> > The >> > two things happen in PCE, so, will not make negative impact on the >> > network. >> > Thought? >> > >> > Thanks >> > >> > Qin >> > >> > >> > >> > >> > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne >> > > wrote: >> >> >> >> Qin, Diego, >> >> >> >> My 2 cents. I agree with you that it would be nice for the PCE to >> >> be able to get some per-channel information. Although adaptive >> >> channel hopping (i.e. >> >> selectively blacklisting frequencies for a specific bundle) is >> >> appealing in principle, it's unclear (at least to me) whether the >> >> gains clearly outweigh the overhead (complexity, signalign >> >> traffic) one has to pay to coordinate this [1-5]. >> >> >> >> My opinion is that we should enable both metrics averages over all >> >> channels, and per-channel metrics. In some configurations, one can >> >> imagine gathering the former by default, and querying for the >> >> latter on specific occasions. Having the option of gathering >> >> per-channel information does enable us to be future-proof against >> >> future adaptive channel hopping algorithm. >> >> >> >> For sure, this makes for a great question: how do a pair of motes >> >> and the PCE have to communicate to enable adaptive channel hopping >> >> on that link? The answer to that might directly impact the >> >> application payload formats we have are talking about. Is this >> >> something you be interested in looking further into? >> >> >> >> Thomas >> >> >> >> [1] A Decentralized Scheduling Algorithm for Time Synchronized >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, Alexandr= e M. >> >> Bayen. >> >> ICST Transactions on Mobile Communications and Applications, 11(7-9). >> >> European Union Digital Library link. >> >> doi:10.4108/icst.trans.mca.2011.e5. >> >> September 2011. >> >> [2] A Decentralized Scheduling Algorithm for Time Synchronized >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister. >> >> International Conference on Ad Hoc Networks (ADHOCNETS), Victoria, >> >> BC, Canada, 18-20 August 2010. >> >> [3] Mitigating Multipath Fading Through Channel Hopping in >> >> Wireless Sensor Networks. Thomas Watteyne, Steven Lanzisera, Ankur >> >> Mehta, Kris Pister. >> >> IEEE >> >> International Conference on Communications (ICC), Cape Town, South >> >> Africa, >> >> 23-27 May, 2010. >> >> [4] Feasibility Analysis of Controller Design for Adaptive Channel >> >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven >> >> Glaser, Kris Pister. First International Workshop on Performance >> >> Methodologies and Tools for Wireless Sensor Networks (WSNPerf), >> >> Pisa, Italy, 23 October 2009. >> >> [5] Reliability Through Frequency Diversity: Why Channel Hopping >> >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM >> >> International Symposium on Performance Evaluation of Wireless Ad >> >> Hoc, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife, Canary >> >> Islands, Spain, 26-30 October 2009. >> >> >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne >> >> > wrote: >> >>> >> >>> Hello Qin, >> >>> I think that a per-frequency report will help the >> >>> PCE to decide which frequency to use, and maybe temporarily >> >>> black-list them. For example, a dynamic scheme may include >> >>> sampling the blacklisted frequencies every X minutes to re-enable >> >>> them once the interference has disappeared. >> >>> This will require the node to refresh the RSSI and >> >>> LQI values in a opportunistic way (every time the a cell uses >> >>> that frequency) to save energy. >> >>> >> >>> Any thoughts? >> >>> >> >>> Diego >> >> >> >> >> >> _______________________________________________ >> >> 6tsch mailing list >> >> 6tsch@ietf.org >> >> https://www.ietf.org/mailman/listinfo/6tsch >> >> >> > >> > >> > _______________________________________________ >> > 6tsch mailing list >> > 6tsch@ietf.org >> > https://www.ietf.org/mailman/listinfo/6tsch >> > >> >> >> >> -- >> DIEGO DUJOVNE >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicacione= s >> Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl >> (56 2) 676 8125 > > -- DIEGO DUJOVNE Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl (56 2) 676 8125 _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_5B322D976941488698B048964CF3DB2Cutwentenl_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
    Hi Qin,

    "Link-by-link" adaptive channel hopping in ISA is used by a = node to select the best frequencies for its further communication with its = particular neighbor. 
    And, cell over-provision (i.e. the combination of "channel offset= " and "slot" info used for communication with a particular n= eighbor), might be used for evaluating the internal interference and BW req= uirements between two neighbors. Am I right?

    Best wishes,
    Pouria Zand

    On Sep 16, 2013, at 4:34 PM, "Qin Wang" <qinwang@berkeley.edu> wrote:

    Hi Pouria and Diego,

    I think the "link-by-link" adaptive channel hopping mechanis= m of ISA100.11a AND cell over-provision mechanism of 6top can be used toget= her. Make sense?

    Thanks
    Qin


    On Mon, Sep 16, 2013 at 8:56 AM, <P.Zand@utwent= e.nl> wrote:
    Hi Diego,

    ISA100.11a considers the adaptive channel hopping on a link-by-link basis, = in addition to traditional blacklisting on the whole network. This mechanis= m is described as following:

    "Additionally, a device may autonomously treat transmit links on probl= ematic channels as idle, thus reducing unnecessary interference and wasted = energy on channels with a history of poor connectivity. A device skipping l= inks in this manner should periodically test the links to verify that they remain problematic. Such selective chan= nel utilization can be disabled by the system manager on a link-by-link bas= is, through the attribute dlmo.Link[].Type.SelectiveAllowed. [1]"

    In this scheme, the sender/receiver consider the poor channel as idle. The = sender and receiver (on the poor edge) will still follow the defined hoppin= g pattern and they will not conflict with the rest of the network.
    Potential Drawbacks: 1/16 of the resources might be wasted on that edge, bu= t the poor channel of that edge will be skipped, locally.
    Important Strength: The overhead of this scheme is low.

    Best wishes,
    puoria

    1. IEC 62734: Industrial communication networks - Fieldbus specifications -= Wireless systems for industrial automation: process control and related ap= plications - ISA100.11a.

    -----Original Message-----
    From: 6tsch-bounces@ietf.org = [mailto:6tsch-bounces@ietf.org] On Behalf Of Prof. Diego Dujovne
    Sent: Friday, September 13, 2013 9:07 PM
    To: Qin Wang
    Cc: Thomas Watteyne; 6TSCH
    Subject: Re: [6tsch] report flow contents

    Hi Qin,
              On the centralized case, changing the ch= annel hopping sequence (and thus blacklisting the channels with interferenc= e) on the whole network, and not in a peer basis is not efficient in terms = of channel usage. Let me explain this with an
    example:

    Let's say there is are 4 nodes: A, B, C and D. A and B are interfered only = on channel 4 by an external source, while C and D listen interference only = on channel 8. If I disable channel 4 and 8 by blacklisting both channels fr= om the hopping sequence, A and B won't be able to use channel 8 and C and D won't be able to use channel 4,= both interference free between them.

    On the distributed case, if two nodes are already connected and if both det= ect a interfered channel they will (someway) agree to blacklist that channe= l from the hopping sequence. But we have not arrived to this case yet on 6T= iSCH.

    On the other side, if we blacklist by changing the hopping sequence, a node= talking to different neighbours will have different channel hopping sequen= ces. And this increases complexity too.

    I don't have an answer (just questions) on how to reduce the probability of= using an interfered channel, but it seems that the current tsch scheme doe= s not allow a simple way to blacklist channels unless it is done network-wi= de. To sum up, I'm worrying about reducing channel diversity.

    Thoughts?

                         = ;                     &nb= sp;              Diego






    2013/9/13 Qin Wang <    qinwang@berk= eley.edu>:
    > Hi Diego,
    >
    > I understand, theoretically, dynamic allocation may have some
    > advantages in terms of increasing reliability. But, in the channel
    > hopping network, it is challenge for a node to catch up the channel > hopping sequence change in its neighbors. Thus, I think, if updating > channel hopping sequence, it could be better to do it in network wide.= What do you think?
    >
    > Thanks
    > Qin
    >
    >
    > On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne
    > <diego.dujovne@mail.ud= p.cl> wrote:
    >>
    >> Qin,
    >>       I think frequency blacklisting on a node-pair= basis (either
    >> centralized or distributed) would break the schedule matrix
    >> structure, which overrides narrowband interference by channel
    >> hopping.
    >> If frequencies are blacklisted on all slots, that would waste
    >> resources. Narrowband interference can harm the link locally, but = the
    >> same frequency may be interference-free in other parts of the net.=
    >>       The dynamic allocation I propose was only an = example. If you
    >> have 16 frequencies and 2 of them have interference, and the chann= el
    >> offset is sequential, you may loose 2 packets every 16. Am I right= on
    >> this?
    >>
    >> Thoughts?
    >>
    >>                   &nb= sp;                     &= nbsp;             Diego
    >>
    >>
    >> 2013/9/13 Qin Wang <qin= wang@berkeley.edu>:
    >> > Thomas,
    >> >
    >> > I agree with you that it is not clear what is the advantage a= nd
    >> > disadvantage of adaptive channel hopping in reality.
    >> >
    >> > In mind, based on the per-frequency report, PCE can do two th= ings:
    >> > (1) update channel hopping sequence is a frequency is really = bad
    >> > network wide;
    >> > (2) avoid use some bad channel when it runs cell allocation a= lgorithm.
    >> > The
    >> > two things happen in PCE, so, will not make negative impact o= n the
    >> > network.
    >> > Thought?
    >> >
    >> > Thanks
    >> >
    >> > Qin
    >> >
    >> >
    >> >
    >> >
    >> > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne
    >> > <watteyne@ee= cs.berkeley.edu> wrote:
    >> >>
    >> >> Qin, Diego,
    >> >>
    >> >> My 2 cents. I agree with you that it would be nice for th= e PCE to
    >> >> be able to get some per-channel information. Although ada= ptive
    >> >> channel hopping (i.e.
    >> >> selectively blacklisting frequencies for a specific bundl= e) is
    >> >> appealing in principle, it's unclear (at least to me) whe= ther the
    >> >> gains clearly outweigh the overhead (complexity, signalig= n
    >> >> traffic) one has to pay to coordinate this [1-5].
    >> >>
    >> >> My opinion is that we should enable both metrics averages= over all
    >> >> channels, and per-channel metrics. In some configurations= , one can
    >> >> imagine gathering the former by default, and querying for= the
    >> >> latter on specific occasions. Having the option of gather= ing
    >> >> per-channel information does enable us to be future-proof= against
    >> >> future adaptive channel hopping algorithm.
    >> >>
    >> >> For sure, this makes for a great question: how do a pair = of motes
    >> >> and the PCE have to communicate to enable adaptive channe= l hopping
    >> >> on that link? The answer to that might directly impact th= e
    >> >> application payload formats we have are talking about. Is= this
    >> >> something you be interested in looking further into?
    >> >>
    >> >> Thomas
    >> >>
    >> >> [1] A Decentralized Scheduling Algorithm for Time Synchro= nized
    >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pist= er, Alexandre M.
    >> >> Bayen.
    >> >> ICST Transactions on Mobile Communications and Applicatio= ns, 11(7-9).
    >> >> European Union Digital Library link.
    >> >> doi:10.4108/icst.trans.mca.2011.e5.
    >> >> September 2011.
    >> >> [2] A Decentralized Scheduling Algorithm for Time Synchro= nized
    >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pist= er.
    >> >> International Conference on Ad Hoc Networks (ADHOCNETS), = Victoria,
    >> >> BC, Canada, 18-20 August 2010.
    >> >> [3] Mitigating Multipath Fading Through Channel Hopping i= n
    >> >> Wireless Sensor Networks. Thomas Watteyne, Steven Lanzise= ra, Ankur
    >> >> Mehta, Kris Pister.
    >> >> IEEE
    >> >> International Conference on Communications (ICC), Cape To= wn, South
    >> >> Africa,
    >> >> 23-27 May, 2010.
    >> >> [4] Feasibility Analysis of Controller Design for Adaptiv= e Channel
    >> >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco,= Steven
    >> >> Glaser, Kris Pister. First International Workshop on Perf= ormance
    >> >> Methodologies and Tools for Wireless Sensor Networks (WSN= Perf),
    >> >> Pisa, Italy, 23 October 2009.
    >> >> [5] Reliability Through Frequency Diversity: Why Channel = Hopping
    >> >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. S= ixth ACM
    >> >> International Symposium on Performance Evaluation of Wire= less Ad
    >> >> Hoc, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife= , Canary
    >> >> Islands, Spain, 26-30 October 2009.
    >> >>
    >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne
    >> >> <diego.du= jovne@mail.udp.cl> wrote:
    >> >>>
    >> >>> Hello Qin,
    >> >>>               I th= ink that a per-frequency report will help the
    >> >>> PCE to decide which frequency to use, and maybe tempo= rarily
    >> >>> black-list them. For example, a dynamic scheme may in= clude
    >> >>> sampling the blacklisted frequencies every X minutes = to re-enable
    >> >>> them once the interference has disappeared.
    >> >>>              This = will require the node to refresh the RSSI and
    >> >>> LQI values in a opportunistic way (every time the a c= ell uses
    >> >>> that frequency) to save energy.
    >> >>>
    >> >>> Any thoughts?
    >> >>>
    >> >>>               &nbs= p;             Diego
    >> >>
    >> >>
    >> >> _______________________________________________
    >> >> 6tsch mailing list
    >> >> 6tsch@ietf.org
    >> >> https://www.ietf.org/mailman/listinfo/6tsch
    >> >>
    >> >
    >> >
    >> > _______________________________________________
    >> > 6tsch mailing list
    >> > 6tsch@ietf.org
    >> > https://www.ietf.org/mailman/listinfo/6tsch
    >> >
    >>
    >>
    >>
    >> --
    >> DIEGO DUJOVNE
    >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunic= aciones
    >> Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl
    >> (56 2) 676 8125
    >
    >



    --
    DIEGO DUJOVNE
    Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP
    www.ingenieria.u= dp.cl
    (56 2) 676 8125
    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch

    --_000_5B322D976941488698B048964CF3DB2Cutwentenl_-- From twatteyne@gmail.com Mon Sep 16 11:17:07 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C863311E8139 for <6tsch@ietfa.amsl.com>; Mon, 16 Sep 2013 11:17:07 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.461 X-Spam-Level: X-Spam-Status: No, score=-1.461 tagged_above=-999 required=5 tests=[AWL=0.516, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QMkOXjEIN-6D for <6tsch@ietfa.amsl.com>; Mon, 16 Sep 2013 11:17:05 -0700 (PDT) Received: from mail-pb0-x232.google.com (mail-pb0-x232.google.com [IPv6:2607:f8b0:400e:c01::232]) by ietfa.amsl.com (Postfix) with ESMTP id D3BD111E810D for <6tsch@ietf.org>; Mon, 16 Sep 2013 11:17:05 -0700 (PDT) Received: by mail-pb0-f50.google.com with SMTP id uo5so4369376pbc.23 for <6tsch@ietf.org>; Mon, 16 Sep 2013 11:17:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=37FogDLZh6TuUxAK9C2Ue7SKxLOkgy8h2H3XwnnlWts=; b=FYdbj/5EoJ/MnXmIvPEv8tV+RkBomzMZTR8VPuA2J0k/3RBH/ILwYc6slqW1lGNvGl hWZ3gWwYwCs56c0moUxew3xvvRa+ue68OACdk6FFbnpKKk5fXihmSu3VExZvR4XJ6PDn fyxFig/lHqfWGl7FyuFHyP5TdMYDoRzFYQKKb77NYVFJ2UCCnOqtjtqiAIHBisROEV/S PzfNg0x6FhfEDcMJomfAQhxpHtliTwzN2kRAMZ8gJVrg2PgbHtoeeeZcidky+oVrJEN+ NhI5vakh6BV+lzgFpDGtGRfBRcgpylqKWs9vj2gEOqIb0ZEddpRUmWlwkGMgS6N7rsB1 EwvA== X-Received: by 10.68.4.197 with SMTP id m5mr30397360pbm.46.1379355420516; Mon, 16 Sep 2013 11:17:00 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Mon, 16 Sep 2013 11:16:38 -0700 (PDT) From: Thomas Watteyne Date: Mon, 16 Sep 2013 11:16:38 -0700 X-Google-Sender-Auth: 0rPKXM-2i9R5c-sgPIFVEhl3Zac Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=bcaec52154e1dbe86504e6843513 Subject: [6tsch] blacklisting (was "report flow contents") X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Sep 2013 18:17:07 -0000 --bcaec52154e1dbe86504e6843513 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable *[changed thread subject from 'report flow contents' to 'blacklisting (was "report flow contents")']* All, Great discussion! Allow me to sum up. Problem statement: - At 2.4GHz, 16 orthogonal frequencies are available. - "blind" channel hopping exploits frequencies diversity by hopping on all 16 frequencies - because of interference and multi-path fading, some frequencies exhibit a worse Packet Delivery Ratio (PFD) than others - if because of interference, it is possible that same set of frequencies are "bad" in the whole network - if because of multi-path fading, the set of "bad" frequencies is different for every pair of neighbor nodes Network-wide blacklisting: - goal: prevent all nodes in the network to use a given frequency - decision can be made by PCE after receiving statistics, or administratively by operator configuration - different mechanisms to blacklist a channel: - modify the hopping pattern to include the same frequency twice and remove another one. Can be done on-the-fly. - consider there are only 15 frequencies, and build a schedule with 15 channel offsets. Needs to be done before network starts (or long process of "freeing-up" one channel offset) - efficiency is limited since: - because of multi-path fading, a "bad" channel might not be bad for all bundles - limits frequency diversity Per-link blacklisting: - goal: prevent a bundle (i.e. two neighbors scheduled to communicate) to use a given frequency - decision can be made based on the per-frequency statistics gathered (packet counters and/or RSSI/LQI) - problem: - changing the hopping pattern for a single bundle can create interference with other bundles since collisions are possible if hopping on different sets of frequencies. - solution (used by ISA100): - cancel a scheduled communication if that communication happens on the blacklisted channel - note that this will reduce the bandwidth of that bundle by 1/16, so needs possibly to be combined with adding 1/16 more cells to that bun= dle. Did I miss something? Thomas On Mon, Sep 16, 2013 at 9:35 AM, wrote: > Hi Qin, > > "Link-by-link" adaptive channel hopping in ISA is used by a node to > select the best frequencies for its further communication with its > particular neighbor. > And, cell over-provision (i.e. the combination of "channel offset" and > "slot" info used for communication with a particular neighbor), might be > used for evaluating the internal interference and BW requirements between > two neighbors. Am I right? > > Best wishes, > Pouria Zand > > On Sep 16, 2013, at 4:34 PM, "Qin Wang" wrote: > > Hi Pouria and Diego, > > I think the "link-by-link" adaptive channel hopping mechanism of > ISA100.11a AND cell over-provision mechanism of 6top can be used together= . > Make sense? > > Thanks > Qin > > > On Mon, Sep 16, 2013 at 8:56 AM, wrote: > >> Hi Diego, >> >> ISA100.11a considers the adaptive channel hopping on a link-by-link >> basis, in addition to traditional blacklisting on the whole network. Thi= s >> mechanism is described as following: >> >> "Additionally, a device may autonomously treat transmit links on >> problematic channels as idle, thus reducing unnecessary interference and >> wasted energy on channels with a history of poor connectivity. A device >> skipping links in this manner should periodically test the links to veri= fy >> that they remain problematic. Such selective channel utilization can be >> disabled by the system manager on a link-by-link basis, through the >> attribute dlmo.Link[].Type.SelectiveAllowed. [1]" >> >> In this scheme, the sender/receiver consider the poor channel as idle. >> The sender and receiver (on the poor edge) will still follow the defined >> hopping pattern and they will not conflict with the rest of the network. >> Potential Drawbacks: 1/16 of the resources might be wasted on that edge, >> but the poor channel of that edge will be skipped, locally. >> Important Strength: The overhead of this scheme is low. >> >> Best wishes, >> puoria >> >> 1. IEC 62734: Industrial communication networks - Fieldbus specification= s >> - Wireless systems for industrial automation: process control and relate= d >> applications - ISA100.11a. >> >> -----Original Message----- >> From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf >> Of Prof. Diego Dujovne >> Sent: Friday, September 13, 2013 9:07 PM >> To: Qin Wang >> Cc: Thomas Watteyne; 6TSCH >> Subject: Re: [6tsch] report flow contents >> >> Hi Qin, >> On the centralized case, changing the channel hopping sequence >> (and thus blacklisting the channels with interference) on the whole >> network, and not in a peer basis is not efficient in terms of channel >> usage. Let me explain this with an >> example: >> >> Let's say there is are 4 nodes: A, B, C and D. A and B are interfered >> only on channel 4 by an external source, while C and D listen interferen= ce >> only on channel 8. If I disable channel 4 and 8 by blacklisting both >> channels from the hopping sequence, A and B won't be able to use channel= 8 >> and C and D won't be able to use channel 4, both interference free betwe= en >> them. >> >> On the distributed case, if two nodes are already connected and if both >> detect a interfered channel they will (someway) agree to blacklist that >> channel from the hopping sequence. But we have not arrived to this case = yet >> on 6TiSCH. >> >> On the other side, if we blacklist by changing the hopping sequence, a >> node talking to different neighbours will have different channel hopping >> sequences. And this increases complexity too. >> >> I don't have an answer (just questions) on how to reduce the probability >> of using an interfered channel, but it seems that the current tsch schem= e >> does not allow a simple way to blacklist channels unless it is done >> network-wide. To sum up, I'm worrying about reducing channel diversity. >> >> Thoughts? >> >> Diego >> >> >> >> >> >> >> 2013/9/13 Qin Wang : >> > Hi Diego, >> > >> > I understand, theoretically, dynamic allocation may have some >> > advantages in terms of increasing reliability. But, in the channel >> > hopping network, it is challenge for a node to catch up the channel >> > hopping sequence change in its neighbors. Thus, I think, if updating >> > channel hopping sequence, it could be better to do it in network wide. >> What do you think? >> > >> > Thanks >> > Qin >> > >> > >> > On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne >> > wrote: >> >> >> >> Qin, >> >> I think frequency blacklisting on a node-pair basis (either >> >> centralized or distributed) would break the schedule matrix >> >> structure, which overrides narrowband interference by channel >> >> hopping. >> >> If frequencies are blacklisted on all slots, that would waste >> >> resources. Narrowband interference can harm the link locally, but the >> >> same frequency may be interference-free in other parts of the net. >> >> The dynamic allocation I propose was only an example. If you >> >> have 16 frequencies and 2 of them have interference, and the channel >> >> offset is sequential, you may loose 2 packets every 16. Am I right on >> >> this? >> >> >> >> Thoughts? >> >> >> >> Diego >> >> >> >> >> >> 2013/9/13 Qin Wang : >> >> > Thomas, >> >> > >> >> > I agree with you that it is not clear what is the advantage and >> >> > disadvantage of adaptive channel hopping in reality. >> >> > >> >> > In mind, based on the per-frequency report, PCE can do two things: >> >> > (1) update channel hopping sequence is a frequency is really bad >> >> > network wide; >> >> > (2) avoid use some bad channel when it runs cell allocation >> algorithm. >> >> > The >> >> > two things happen in PCE, so, will not make negative impact on the >> >> > network. >> >> > Thought? >> >> > >> >> > Thanks >> >> > >> >> > Qin >> >> > >> >> > >> >> > >> >> > >> >> > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne >> >> > wrote: >> >> >> >> >> >> Qin, Diego, >> >> >> >> >> >> My 2 cents. I agree with you that it would be nice for the PCE to >> >> >> be able to get some per-channel information. Although adaptive >> >> >> channel hopping (i.e. >> >> >> selectively blacklisting frequencies for a specific bundle) is >> >> >> appealing in principle, it's unclear (at least to me) whether the >> >> >> gains clearly outweigh the overhead (complexity, signalign >> >> >> traffic) one has to pay to coordinate this [1-5]. >> >> >> >> >> >> My opinion is that we should enable both metrics averages over all >> >> >> channels, and per-channel metrics. In some configurations, one can >> >> >> imagine gathering the former by default, and querying for the >> >> >> latter on specific occasions. Having the option of gathering >> >> >> per-channel information does enable us to be future-proof against >> >> >> future adaptive channel hopping algorithm. >> >> >> >> >> >> For sure, this makes for a great question: how do a pair of motes >> >> >> and the PCE have to communicate to enable adaptive channel hopping >> >> >> on that link? The answer to that might directly impact the >> >> >> application payload formats we have are talking about. Is this >> >> >> something you be interested in looking further into? >> >> >> >> >> >> Thomas >> >> >> >> >> >> [1] A Decentralized Scheduling Algorithm for Time Synchronized >> >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, >> Alexandre M. >> >> >> Bayen. >> >> >> ICST Transactions on Mobile Communications and Applications, >> 11(7-9). >> >> >> European Union Digital Library link. >> >> >> doi:10.4108/icst.trans.mca.2011.e5. >> >> >> September 2011. >> >> >> [2] A Decentralized Scheduling Algorithm for Time Synchronized >> >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister. >> >> >> International Conference on Ad Hoc Networks (ADHOCNETS), Victoria, >> >> >> BC, Canada, 18-20 August 2010. >> >> >> [3] Mitigating Multipath Fading Through Channel Hopping in >> >> >> Wireless Sensor Networks. Thomas Watteyne, Steven Lanzisera, Ankur >> >> >> Mehta, Kris Pister. >> >> >> IEEE >> >> >> International Conference on Communications (ICC), Cape Town, South >> >> >> Africa, >> >> >> 23-27 May, 2010. >> >> >> [4] Feasibility Analysis of Controller Design for Adaptive Channel >> >> >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven >> >> >> Glaser, Kris Pister. First International Workshop on Performance >> >> >> Methodologies and Tools for Wireless Sensor Networks (WSNPerf), >> >> >> Pisa, Italy, 23 October 2009. >> >> >> [5] Reliability Through Frequency Diversity: Why Channel Hopping >> >> >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM >> >> >> International Symposium on Performance Evaluation of Wireless Ad >> >> >> Hoc, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife, Canary >> >> >> Islands, Spain, 26-30 October 2009. >> >> >> >> >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne >> >> >> wrote: >> >> >>> >> >> >>> Hello Qin, >> >> >>> I think that a per-frequency report will help the >> >> >>> PCE to decide which frequency to use, and maybe temporarily >> >> >>> black-list them. For example, a dynamic scheme may include >> >> >>> sampling the blacklisted frequencies every X minutes to re-enable >> >> >>> them once the interference has disappeared. >> >> >>> This will require the node to refresh the RSSI and >> >> >>> LQI values in a opportunistic way (every time the a cell uses >> >> >>> that frequency) to save energy. >> >> >>> >> >> >>> Any thoughts? >> >> >>> >> >> >>> Diego >> >> >> >> >> >> >> >> >> _______________________________________________ >> >> >> 6tsch mailing list >> >> >> 6tsch@ietf.org >> >> >> https://www.ietf.org/mailman/listinfo/6tsch >> >> >> >> >> > >> >> > >> >> > _______________________________________________ >> >> > 6tsch mailing list >> >> > 6tsch@ietf.org >> >> > https://www.ietf.org/mailman/listinfo/6tsch >> >> > >> >> >> >> >> >> >> >> -- >> >> DIEGO DUJOVNE >> >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaci= ones >> >> Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl >> >> (56 2) 676 8125 >> > >> > >> >> >> >> -- >> DIEGO DUJOVNE >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicacione= s >> Facultad de Ingenier=EDa UDP >> www.ingenieria.udp.cl >> (56 2) 676 8125 >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> > > --bcaec52154e1dbe86504e6843513 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    [changed thread subject from 'report flow cont= ents' to 'blacklisting (was "report flow contents")']=

    All,

    Great discussio= n!

    Allow me to sum up.

    Problem st= atement:
    • At 2.4GHz, 16 orthogonal frequencies are availab= le.
    • "blind" channel hopping exploits frequencies diversit= y by hopping on all 16 frequencies
    • because of interference and multi-path fading, some frequencies exhibit= a worse Packet Delivery Ratio (PFD) than others
      • if because of = interference, it is possible that same set of frequencies are "bad&quo= t; in the whole network
      • if because of multi-path fading, the set of "bad" frequencies= is different for every pair of neighbor nodes
    Net= work-wide blacklisting:
    • goal: prevent all nodes in t= he network to use a given frequency
    • decision can be made by PCE after receiving statistics, or administrati= vely by operator configuration
    • different mechanisms to blacklist a = channel:
      • modify the hopping pattern to include the same frequen= cy twice and remove another one. Can be done on-the-fly.
      • consider there are only 15 frequencies, and build a schedule with 15 ch= annel offsets. Needs to be done before network starts (or long process of &= quot;freeing-up" one channel offset)
    • efficiency is limite= d since:
      • because of multi-path fading, a "bad" channel might not b= e bad for all bundles
      • limits frequency diversity
    Per-link blacklisting:
    • goal: prevent a bundle (i.e. two neighbors scheduled to communicate) to= use a given frequency
    • decision can be made based on the per-freque= ncy statistics gathered (packet counters and/or RSSI/LQI)
    • problem:
      • changing the hopping pattern for a single bundle c= an create interference with other bundles since collisions are possible if = hopping on different sets of frequencies.
    • solution (used by ISA100):
      • cancel a scheduled communication if = that communication happens on the blacklisted channel
      • note that thi= s will reduce the bandwidth of that bundle by 1/16, so needs possibly to be= combined with adding 1/16 more cells to that bundle.
    Did I miss something?

    Tho= mas


    On M= on, Sep 16, 2013 at 9:35 AM, <P.Zand@utwente.nl> wrote:
    Hi Qin,

    "Link-by-link" adaptive channel hopping in ISA is used by a = node to select the best frequencies for its further communication with its = particular neighbor.=A0
    And, cell over-provision (i.e. the combination of "channel offset= " and "slot" info used for communication with a particular n= eighbor), might be used for evaluating the internal interference and BW req= uirements between two neighbors. Am I right?

    Best wishes,
    Pouria Zand

    On Sep 16, 2013, at 4:34 PM, "Qin Wang" <qinwang@berkeley.edu> wrote:
    Hi Pouria and Diego,

    I think the "link-by-link" adaptive channel hopping mechanis= m of ISA100.11a AND cell over-provision mechanism of 6top can be used toget= her. Make sense?

    Thanks
    Qin


    On Mon, Sep 16, 2013 at 8:56 AM, <P.Zand@utwent= e.nl> wrote:
    Hi Diego,

    ISA100.11a considers the adaptive channel hopping on a link-by-link basis, = in addition to traditional blacklisting on the whole network. This mechanis= m is described as following:

    "Additionally, a device may autonomously treat transmit links on probl= ematic channels as idle, thus reducing unnecessary interference and wasted = energy on channels with a history of poor connectivity. A device skipping l= inks in this manner should periodically test the links to verify that they remain problematic. Such selective chan= nel utilization can be disabled by the system manager on a link-by-link bas= is, through the attribute dlmo.Link[].Type.SelectiveAllowed. [1]"

    In this scheme, the sender/receiver consider the poor channel as idle. The = sender and receiver (on the poor edge) will still follow the defined hoppin= g pattern and they will not conflict with the rest of the network.
    Potential Drawbacks: 1/16 of the resources might be wasted on that edge, bu= t the poor channel of that edge will be skipped, locally.
    Important Strength: The overhead of this scheme is low.

    Best wishes,
    puoria

    1. IEC 62734: Industrial communication networks - Fieldbus specifications -= Wireless systems for industrial automation: process control and related ap= plications - ISA100.11a.

    -----Original Message-----
    From: 6tsch-bou= nces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Prof. Diego Dujovne
    Sent: Friday, September 13, 2013 9:07 PM
    To: Qin Wang
    Cc: Thomas Watteyne; 6TSCH
    Subject: Re: [6tsch] report flow contents

    Hi Qin,
    =A0 =A0 =A0 =A0 =A0 On the centralized case, changing the channel hopping s= equence (and thus blacklisting the channels with interference) on the whole= network, and not in a peer basis is not efficient in terms of channel usag= e. Let me explain this with an
    example:

    Let's say there is are 4 nodes: A, B, C and D. A and B are interfered o= nly on channel 4 by an external source, while C and D listen interference o= nly on channel 8. If I disable channel 4 and 8 by blacklisting both channel= s from the hopping sequence, A and B won't be able to use channel 8 and C and D won't be able to use ch= annel 4, both interference free between them.

    On the distributed case, if two nodes are already connected and if both det= ect a interfered channel they will (someway) agree to blacklist that channe= l from the hopping sequence. But we have not arrived to this case yet on 6T= iSCH.

    On the other side, if we blacklist by changing the hopping sequence, a node= talking to different neighbours will have different channel hopping sequen= ces. And this increases complexity too.

    I don't have an answer (just questions) on how to reduce the probabilit= y of using an interfered channel, but it seems that the current tsch scheme= does not allow a simple way to blacklist channels unless it is done networ= k-wide. To sum up, I'm worrying about reducing channel diversity.

    Thoughts?

    =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0Diego






    2013/9/13 Qin Wang <qinwang@berkeley.edu>:
    > Hi Diego,
    >
    > I understand, theoretically, dynamic allocation may have some
    > advantages in terms of increasing reliability. But, in the channel
    > hopping network, it is challenge for a node to catch up the channel > hopping sequence change in its neighbors. Thus, I think, if updating > channel hopping sequence, it could be better to do it in network wide.= What do you think?
    >
    > Thanks
    > Qin
    >
    >
    > On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne
    > <die= go.dujovne@mail.udp.cl> wrote:
    >>
    >> Qin,
    >> =A0 =A0 =A0 I think frequency blacklisting on a node-pair basis (e= ither
    >> centralized or distributed) would break the schedule matrix
    >> structure, which overrides narrowband interference by channel
    >> hopping.
    >> If frequencies are blacklisted on all slots, that would waste
    >> resources. Narrowband interference can harm the link locally, but = the
    >> same frequency may be interference-free in other parts of the net.=
    >> =A0 =A0 =A0 The dynamic allocation I propose was only an example. = If you
    >> have 16 frequencies and 2 of them have interference, and the chann= el
    >> offset is sequential, you may loose 2 packets every 16. Am I right= on
    >> this?
    >>
    >> Thoughts?
    >>
    >> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Diego
    >>
    >>
    >> 2013/9/13 Qin Wang <qinwang@berkeley.edu>:
    >> > Thomas,
    >> >
    >> > I agree with you that it is not clear what is the advantage a= nd
    >> > disadvantage of adaptive channel hopping in reality.
    >> >
    >> > In mind, based on the per-frequency report, PCE can do two th= ings:
    >> > (1) update channel hopping sequence is a frequency is really = bad
    >> > network wide;
    >> > (2) avoid use some bad channel when it runs cell allocation a= lgorithm.
    >> > The
    >> > two things happen in PCE, so, will not make negative impact o= n the
    >> > network.
    >> > Thought?
    >> >
    >> > Thanks
    >> >
    >> > Qin
    >> >
    >> >
    >> >
    >> >
    >> > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne
    >> > <watteyne@eecs.berkeley.edu> wrote:
    >> >>
    >> >> Qin, Diego,
    >> >>
    >> >> My 2 cents. I agree with you that it would be nice for th= e PCE to
    >> >> be able to get some per-channel information. Although ada= ptive
    >> >> channel hopping (i.e.
    >> >> selectively blacklisting frequencies for a specific bundl= e) is
    >> >> appealing in principle, it's unclear (at least to me)= whether the
    >> >> gains clearly outweigh the overhead (complexity, signalig= n
    >> >> traffic) one has to pay to coordinate this [1-5].
    >> >>
    >> >> My opinion is that we should enable both metrics averages= over all
    >> >> channels, and per-channel metrics. In some configurations= , one can
    >> >> imagine gathering the former by default, and querying for= the
    >> >> latter on specific occasions. Having the option of gather= ing
    >> >> per-channel information does enable us to be future-proof= against
    >> >> future adaptive channel hopping algorithm.
    >> >>
    >> >> For sure, this makes for a great question: how do a pair = of motes
    >> >> and the PCE have to communicate to enable adaptive channe= l hopping
    >> >> on that link? The answer to that might directly impact th= e
    >> >> application payload formats we have are talking about. Is= this
    >> >> something you be interested in looking further into?
    >> >>
    >> >> Thomas
    >> >>
    >> >> [1] A Decentralized Scheduling Algorithm for Time Synchro= nized
    >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pist= er, Alexandre M.
    >> >> Bayen.
    >> >> ICST Transactions on Mobile Communications and Applicatio= ns, 11(7-9).
    >> >> European Union Digital Library link.
    >> >> doi:10.4108/icst.trans.mca.2011.e5.
    >> >> September 2011.
    >> >> [2] A Decentralized Scheduling Algorithm for Time Synchro= nized
    >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pist= er.
    >> >> International Conference on Ad Hoc Networks (ADHOCNETS), = Victoria,
    >> >> BC, Canada, 18-20 August 2010.
    >> >> [3] Mitigating Multipath Fading Through Channel Hopping i= n
    >> >> Wireless Sensor Networks. Thomas Watteyne, Steven Lanzise= ra, Ankur
    >> >> Mehta, Kris Pister.
    >> >> IEEE
    >> >> International Conference on Communications (ICC), Cape To= wn, South
    >> >> Africa,
    >> >> 23-27 May, 2010.
    >> >> [4] Feasibility Analysis of Controller Design for Adaptiv= e Channel
    >> >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco,= Steven
    >> >> Glaser, Kris Pister. First International Workshop on Perf= ormance
    >> >> Methodologies and Tools for Wireless Sensor Networks (WSN= Perf),
    >> >> Pisa, Italy, 23 October 2009.
    >> >> [5] Reliability Through Frequency Diversity: Why Channel = Hopping
    >> >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. S= ixth ACM
    >> >> International Symposium on Performance Evaluation of Wire= less Ad
    >> >> Hoc, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife= , Canary
    >> >> Islands, Spain, 26-30 October 2009.
    >> >>
    >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne
    >> >> <diego.dujovne@mail.udp.cl> wrote:
    >> >>>
    >> >>> Hello Qin,
    >> >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 I think that a per-freque= ncy report will help the
    >> >>> PCE to decide which frequency to use, and maybe tempo= rarily
    >> >>> black-list them. For example, a dynamic scheme may in= clude
    >> >>> sampling the blacklisted frequencies every X minutes = to re-enable
    >> >>> them once the interference has disappeared.
    >> >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0This will require the node= to refresh the RSSI and
    >> >>> LQI values in a opportunistic way (every time the a c= ell uses
    >> >>> that frequency) to save energy.
    >> >>>
    >> >>> Any thoughts?
    >> >>>
    >> >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 Diego
    >> >>
    >> >>
    >> >> _______________________________________________
    >> >> 6tsch mailing list
    >> >> 6tsch= @ietf.org
    >> >> https://www.ietf.org/mailman/listinfo/6tsch
    >> >>
    >> >
    >> >
    >> > _______________________________________________
    >> > 6tsch mailing list
    >> > 6tsch@iet= f.org
    >> > https://www.ietf.org/mailman/listinfo/6tsch
    >> >
    >>
    >>
    >>
    >> --
    >> DIEGO DUJOVNE
    >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunic= aciones
    >> Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl
    >> (56 2) 676 8125
    >
    >



    --
    DIEGO DUJOVNE
    Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP
    www.ingenieria.u= dp.cl
    (56 2) 676 8125
    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch


    --bcaec52154e1dbe86504e6843513-- From qinwang@berkeley.edu Mon Sep 16 14:34:09 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A416611E8112 for <6tsch@ietfa.amsl.com>; Mon, 16 Sep 2013 14:34:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.505 X-Spam-Level: X-Spam-Status: No, score=-2.505 tagged_above=-999 required=5 tests=[AWL=0.471, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id l5kDXvzSMux2 for <6tsch@ietfa.amsl.com>; Mon, 16 Sep 2013 14:34:05 -0700 (PDT) Received: from mail-ie0-f170.google.com (mail-ie0-f170.google.com [209.85.223.170]) by ietfa.amsl.com (Postfix) with ESMTP id 4495211E81E9 for <6tsch@ietf.org>; Mon, 16 Sep 2013 14:34:05 -0700 (PDT) Received: by mail-ie0-f170.google.com with SMTP id x13so8772382ief.15 for <6tsch@ietf.org>; Mon, 16 Sep 2013 14:34:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=oSg/8waazBC4Syy7EpDBPS+Yd/+qj5sssp/6YEtQ1fk=; b=G0E8vOeDvdhaoQYnBsTvsdVpClQ2o3//rBt7wCDtPZ4xuo8XqCQMhCeg1qhXyz7PN1 PcQsTbt/bGHqpPzL9qoWevzZhG1b4nh7t0hXVyD5q/32RNY1CTkfFr7w86BlefFLHKIN y99e2xcNNaQDPvAY/QgQdRWdNcupJ73Cq1ooq5VRdT74ibbdxBCNtx3/RWsH5Qx68dkW XrBzgeBf0KROruMGXayMnO2E46BDsx9RYhhYQZS4JJFvblXF0+wr2t+x0UutK2PcAnZp dT2LhWDbqVkD+g4ZCFdWplvxeuBfYx2SLaNoc/GWu8sCorNyk9G54yJpkopWeCRPSdvg OzPQ== X-Gm-Message-State: ALoCoQmsmkvb/0vOjPFbsYeZweP2xdvRwWn54cDS+tp17efZxlvkibVtFSflzNAsBF3OHUxKrFuX MIME-Version: 1.0 X-Received: by 10.43.152.78 with SMTP id kv14mr4694839icc.13.1379367243693; Mon, 16 Sep 2013 14:34:03 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Mon, 16 Sep 2013 14:34:03 -0700 (PDT) In-Reply-To: References: Date: Tue, 17 Sep 2013 05:34:03 +0800 Message-ID: From: Qin Wang To: Thomas Watteyne Content-Type: multipart/alternative; boundary=001a11c30a84934a0604e686f675 Cc: 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] blacklisting (was "report flow contents") X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Sep 2013 21:34:09 -0000 --001a11c30a84934a0604e686f675 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi Thomas, I fully agree with you. + 2 more comments. (1) Network wide blacklisting can be used to avoid some frequencies occupied by other networks in the same area. (2) Per-link blacklisting can be used when overprovision is applied. For example, we need the bandwidth from nodeA to nodeB is 15 cells per slotframe. Assume it is known that channel-22 is very bad, and others are in good condition. Then, we can schedule 16 cells in one slotframe, and skip channel-22 every time when encountering it. What do you think? Thanks Qin On Tue, Sep 17, 2013 at 2:16 AM, Thomas Watteyne wrote: > *[changed thread subject from 'report flow contents' to 'blacklisting > (was "report flow contents")']* > > All, > > Great discussion! > > Allow me to sum up. > > Problem statement: > > - At 2.4GHz, 16 orthogonal frequencies are available. > - "blind" channel hopping exploits frequencies diversity by hopping on > all 16 frequencies > - because of interference and multi-path fading, some frequencies > exhibit a worse Packet Delivery Ratio (PFD) than others > - if because of interference, it is possible that same set of > frequencies are "bad" in the whole network > - if because of multi-path fading, the set of "bad" frequencies is > different for every pair of neighbor nodes > > Network-wide blacklisting: > > - goal: prevent all nodes in the network to use a given frequency > - decision can be made by PCE after receiving statistics, or > administratively by operator configuration > - different mechanisms to blacklist a channel: > - modify the hopping pattern to include the same frequency twice > and remove another one. Can be done on-the-fly. > - consider there are only 15 frequencies, and build a schedule with > 15 channel offsets. Needs to be done before network starts (or long= process > of "freeing-up" one channel offset) > - efficiency is limited since: > - because of multi-path fading, a "bad" channel might not be bad > for all bundles > - limits frequency diversity > > Per-link blacklisting: > > - goal: prevent a bundle (i.e. two neighbors scheduled to communicate) > to use a given frequency > - decision can be made based on the per-frequency statistics gathered > (packet counters and/or RSSI/LQI) > - problem: > - changing the hopping pattern for a single bundle can create > interference with other bundles since collisions are possible if ho= pping on > different sets of frequencies. > - solution (used by ISA100): > - cancel a scheduled communication if that communication happens on > the blacklisted channel > - note that this will reduce the bandwidth of that bundle by 1/16, > so needs possibly to be combined with adding 1/16 more cells to tha= t bundle. > > Did I miss something? > > Thomas > > > On Mon, Sep 16, 2013 at 9:35 AM, wrote: > >> Hi Qin, >> >> "Link-by-link" adaptive channel hopping in ISA is used by a node to >> select the best frequencies for its further communication with its >> particular neighbor. >> And, cell over-provision (i.e. the combination of "channel offset" and >> "slot" info used for communication with a particular neighbor), might be >> used for evaluating the internal interference and BW requirements betwee= n >> two neighbors. Am I right? >> >> Best wishes, >> Pouria Zand >> >> On Sep 16, 2013, at 4:34 PM, "Qin Wang" wrote: >> >> Hi Pouria and Diego, >> >> I think the "link-by-link" adaptive channel hopping mechanism of >> ISA100.11a AND cell over-provision mechanism of 6top can be used togethe= r. >> Make sense? >> >> Thanks >> Qin >> >> >> On Mon, Sep 16, 2013 at 8:56 AM, wrote: >> >>> Hi Diego, >>> >>> ISA100.11a considers the adaptive channel hopping on a link-by-link >>> basis, in addition to traditional blacklisting on the whole network. Th= is >>> mechanism is described as following: >>> >>> "Additionally, a device may autonomously treat transmit links on >>> problematic channels as idle, thus reducing unnecessary interference an= d >>> wasted energy on channels with a history of poor connectivity. A device >>> skipping links in this manner should periodically test the links to ver= ify >>> that they remain problematic. Such selective channel utilization can be >>> disabled by the system manager on a link-by-link basis, through the >>> attribute dlmo.Link[].Type.SelectiveAllowed. [1]" >>> >>> In this scheme, the sender/receiver consider the poor channel as idle. >>> The sender and receiver (on the poor edge) will still follow the define= d >>> hopping pattern and they will not conflict with the rest of the network= . >>> Potential Drawbacks: 1/16 of the resources might be wasted on that edge= , >>> but the poor channel of that edge will be skipped, locally. >>> Important Strength: The overhead of this scheme is low. >>> >>> Best wishes, >>> puoria >>> >>> 1. IEC 62734: Industrial communication networks - Fieldbus >>> specifications - Wireless systems for industrial automation: process >>> control and related applications - ISA100.11a. >>> >>> -----Original Message----- >>> From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf >>> Of Prof. Diego Dujovne >>> Sent: Friday, September 13, 2013 9:07 PM >>> To: Qin Wang >>> Cc: Thomas Watteyne; 6TSCH >>> Subject: Re: [6tsch] report flow contents >>> >>> Hi Qin, >>> On the centralized case, changing the channel hopping sequenc= e >>> (and thus blacklisting the channels with interference) on the whole >>> network, and not in a peer basis is not efficient in terms of channel >>> usage. Let me explain this with an >>> example: >>> >>> Let's say there is are 4 nodes: A, B, C and D. A and B are interfered >>> only on channel 4 by an external source, while C and D listen interfere= nce >>> only on channel 8. If I disable channel 4 and 8 by blacklisting both >>> channels from the hopping sequence, A and B won't be able to use channe= l 8 >>> and C and D won't be able to use channel 4, both interference free betw= een >>> them. >>> >>> On the distributed case, if two nodes are already connected and if both >>> detect a interfered channel they will (someway) agree to blacklist that >>> channel from the hopping sequence. But we have not arrived to this case= yet >>> on 6TiSCH. >>> >>> On the other side, if we blacklist by changing the hopping sequence, a >>> node talking to different neighbours will have different channel hoppin= g >>> sequences. And this increases complexity too. >>> >>> I don't have an answer (just questions) on how to reduce the probabilit= y >>> of using an interfered channel, but it seems that the current tsch sche= me >>> does not allow a simple way to blacklist channels unless it is done >>> network-wide. To sum up, I'm worrying about reducing channel diversity. >>> >>> Thoughts? >>> >>> Diego >>> >>> >>> >>> >>> >>> >>> 2013/9/13 Qin Wang : >>> > Hi Diego, >>> > >>> > I understand, theoretically, dynamic allocation may have some >>> > advantages in terms of increasing reliability. But, in the channel >>> > hopping network, it is challenge for a node to catch up the channel >>> > hopping sequence change in its neighbors. Thus, I think, if updating >>> > channel hopping sequence, it could be better to do it in network wide= . >>> What do you think? >>> > >>> > Thanks >>> > Qin >>> > >>> > >>> > On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne >>> > wrote: >>> >> >>> >> Qin, >>> >> I think frequency blacklisting on a node-pair basis (either >>> >> centralized or distributed) would break the schedule matrix >>> >> structure, which overrides narrowband interference by channel >>> >> hopping. >>> >> If frequencies are blacklisted on all slots, that would waste >>> >> resources. Narrowband interference can harm the link locally, but th= e >>> >> same frequency may be interference-free in other parts of the net. >>> >> The dynamic allocation I propose was only an example. If you >>> >> have 16 frequencies and 2 of them have interference, and the channel >>> >> offset is sequential, you may loose 2 packets every 16. Am I right o= n >>> >> this? >>> >> >>> >> Thoughts? >>> >> >>> >> Diego >>> >> >>> >> >>> >> 2013/9/13 Qin Wang : >>> >> > Thomas, >>> >> > >>> >> > I agree with you that it is not clear what is the advantage and >>> >> > disadvantage of adaptive channel hopping in reality. >>> >> > >>> >> > In mind, based on the per-frequency report, PCE can do two things: >>> >> > (1) update channel hopping sequence is a frequency is really bad >>> >> > network wide; >>> >> > (2) avoid use some bad channel when it runs cell allocation >>> algorithm. >>> >> > The >>> >> > two things happen in PCE, so, will not make negative impact on the >>> >> > network. >>> >> > Thought? >>> >> > >>> >> > Thanks >>> >> > >>> >> > Qin >>> >> > >>> >> > >>> >> > >>> >> > >>> >> > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne >>> >> > wrote: >>> >> >> >>> >> >> Qin, Diego, >>> >> >> >>> >> >> My 2 cents. I agree with you that it would be nice for the PCE to >>> >> >> be able to get some per-channel information. Although adaptive >>> >> >> channel hopping (i.e. >>> >> >> selectively blacklisting frequencies for a specific bundle) is >>> >> >> appealing in principle, it's unclear (at least to me) whether the >>> >> >> gains clearly outweigh the overhead (complexity, signalign >>> >> >> traffic) one has to pay to coordinate this [1-5]. >>> >> >> >>> >> >> My opinion is that we should enable both metrics averages over al= l >>> >> >> channels, and per-channel metrics. In some configurations, one ca= n >>> >> >> imagine gathering the former by default, and querying for the >>> >> >> latter on specific occasions. Having the option of gathering >>> >> >> per-channel information does enable us to be future-proof against >>> >> >> future adaptive channel hopping algorithm. >>> >> >> >>> >> >> For sure, this makes for a great question: how do a pair of motes >>> >> >> and the PCE have to communicate to enable adaptive channel hoppin= g >>> >> >> on that link? The answer to that might directly impact the >>> >> >> application payload formats we have are talking about. Is this >>> >> >> something you be interested in looking further into? >>> >> >> >>> >> >> Thomas >>> >> >> >>> >> >> [1] A Decentralized Scheduling Algorithm for Time Synchronized >>> >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, >>> Alexandre M. >>> >> >> Bayen. >>> >> >> ICST Transactions on Mobile Communications and Applications, >>> 11(7-9). >>> >> >> European Union Digital Library link. >>> >> >> doi:10.4108/icst.trans.mca.2011.e5. >>> >> >> September 2011. >>> >> >> [2] A Decentralized Scheduling Algorithm for Time Synchronized >>> >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister. >>> >> >> International Conference on Ad Hoc Networks (ADHOCNETS), Victoria= , >>> >> >> BC, Canada, 18-20 August 2010. >>> >> >> [3] Mitigating Multipath Fading Through Channel Hopping in >>> >> >> Wireless Sensor Networks. Thomas Watteyne, Steven Lanzisera, Anku= r >>> >> >> Mehta, Kris Pister. >>> >> >> IEEE >>> >> >> International Conference on Communications (ICC), Cape Town, Sout= h >>> >> >> Africa, >>> >> >> 23-27 May, 2010. >>> >> >> [4] Feasibility Analysis of Controller Design for Adaptive Channe= l >>> >> >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven >>> >> >> Glaser, Kris Pister. First International Workshop on Performance >>> >> >> Methodologies and Tools for Wireless Sensor Networks (WSNPerf), >>> >> >> Pisa, Italy, 23 October 2009. >>> >> >> [5] Reliability Through Frequency Diversity: Why Channel Hopping >>> >> >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth ACM >>> >> >> International Symposium on Performance Evaluation of Wireless Ad >>> >> >> Hoc, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife, Canary >>> >> >> Islands, Spain, 26-30 October 2009. >>> >> >> >>> >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne >>> >> >> wrote: >>> >> >>> >>> >> >>> Hello Qin, >>> >> >>> I think that a per-frequency report will help the >>> >> >>> PCE to decide which frequency to use, and maybe temporarily >>> >> >>> black-list them. For example, a dynamic scheme may include >>> >> >>> sampling the blacklisted frequencies every X minutes to re-enabl= e >>> >> >>> them once the interference has disappeared. >>> >> >>> This will require the node to refresh the RSSI and >>> >> >>> LQI values in a opportunistic way (every time the a cell uses >>> >> >>> that frequency) to save energy. >>> >> >>> >>> >> >>> Any thoughts? >>> >> >>> >>> >> >>> Diego >>> >> >> >>> >> >> >>> >> >> _______________________________________________ >>> >> >> 6tsch mailing list >>> >> >> 6tsch@ietf.org >>> >> >> https://www.ietf.org/mailman/listinfo/6tsch >>> >> >> >>> >> > >>> >> > >>> >> > _______________________________________________ >>> >> > 6tsch mailing list >>> >> > 6tsch@ietf.org >>> >> > https://www.ietf.org/mailman/listinfo/6tsch >>> >> > >>> >> >>> >> >>> >> >>> >> -- >>> >> DIEGO DUJOVNE >>> >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicac= iones >>> >> Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl >>> >> (56 2) 676 8125 >>> > >>> > >>> >>> >>> >>> -- >>> DIEGO DUJOVNE >>> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicacion= es >>> Facultad de Ingenier=EDa UDP >>> www.ingenieria.udp.cl >>> (56 2) 676 8125 >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >> >> > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --001a11c30a84934a0604e686f675 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Hi Thomas,

    I fully agree with you. + 2 = more comments.

    (1) Network wide blacklisting can b= e used to avoid some frequencies occupied by other networks in the same are= a.

    (2) Per-link blacklisting can be used when overprovisio= n is applied. For example, we need the bandwidth from nodeA to nodeB is 15 = cells per slotframe. Assume it is known that channel-22 is very bad, and ot= hers are in good condition. Then, we can schedule 16 cells in one slotframe= , and skip channel-22 every time when encountering it.=A0

    What do you think?

    Thanks<= /div>
    Qin


    On Tue, Sep 17, 2013 at 2:16 AM, Thomas Watteyne <wat= teyne@eecs.berkeley.edu> wrote:
    [changed thread sub= ject from 'report flow contents' to 'blacklisting (was "re= port flow contents")']

    All,

    Great discussion!

    Allow me to sum up.

    Problem st= atement:
    • At 2.4GHz, 16 orthogonal frequencies are availab= le.
    • "blind" channel hopping exploits frequencies diversit= y by hopping on all 16 frequencies
    • because of interference and multi-path fading, some frequencies exhibit= a worse Packet Delivery Ratio (PFD) than others
      • if because of = interference, it is possible that same set of frequencies are "bad&quo= t; in the whole network
      • if because of multi-path fading, the set of "bad" frequencies= is different for every pair of neighbor nodes
    Net= work-wide blacklisting:
    • goal: prevent all nodes in t= he network to use a given frequency
    • decision can be made by PCE after receiving statistics, or administrati= vely by operator configuration
    • different mechanisms to blacklist a = channel:
      • modify the hopping pattern to include the same frequen= cy twice and remove another one. Can be done on-the-fly.
      • consider there are only 15 frequencies, and build a schedule with 15 ch= annel offsets. Needs to be done before network starts (or long process of &= quot;freeing-up" one channel offset)
    • efficiency is limite= d since:
      • because of multi-path fading, a "bad" channel might not b= e bad for all bundles
      • limits frequency diversity
    Per-link blacklisting:
    • goal: prevent a bundle (i.e. two neighbors scheduled to communicate) to= use a given frequency
    • decision can be made based on the per-freque= ncy statistics gathered (packet counters and/or RSSI/LQI)
    • problem:
      • changing the hopping pattern for a single bundle c= an create interference with other bundles since collisions are possible if = hopping on different sets of frequencies.
    • solution (used by ISA100):
      • cancel a scheduled communication if = that communication happens on the blacklisted channel
      • note that thi= s will reduce the bandwidth of that bundle by 1/16, so needs possibly to be= combined with adding 1/16 more cells to that bundle.
    Did I miss something?

    Tho= mas


    On M= on, Sep 16, 2013 at 9:35 AM, <P.Zand@utwente.nl> wrote:
    Hi Qin,

    "Link-by-link" adaptive channel hopping in ISA is used by a = node to select the best frequencies for its further communication with its = particular neighbor.=A0
    And, cell over-provision (i.e. the combination of "channel offset= " and "slot" info used for communication with a particular n= eighbor), might be used for evaluating the internal interference and BW req= uirements between two neighbors. Am I right?

    Best wishes,
    Pouria Zand

    On Sep 16, 2013, at 4:34 PM, "Qin Wang" <qinwang@berkeley.edu> wrote:
    Hi Pouria and Diego,

    I think the "link-by-link" adaptive channel hopping mechanis= m of ISA100.11a AND cell over-provision mechanism of 6top can be used toget= her. Make sense?

    Thanks
    Qin


    On Mon, Sep 16, 2013 at 8:56 AM, <P.Zand@utwent= e.nl> wrote:
    Hi Diego,

    ISA100.11a considers the adaptive channel hopping on a link-by-link basis, = in addition to traditional blacklisting on the whole network. This mechanis= m is described as following:

    "Additionally, a device may autonomously treat transmit links on probl= ematic channels as idle, thus reducing unnecessary interference and wasted = energy on channels with a history of poor connectivity. A device skipping l= inks in this manner should periodically test the links to verify that they remain problematic. Such selective chan= nel utilization can be disabled by the system manager on a link-by-link bas= is, through the attribute dlmo.Link[].Type.SelectiveAllowed. [1]"

    In this scheme, the sender/receiver consider the poor channel as idle. The = sender and receiver (on the poor edge) will still follow the defined hoppin= g pattern and they will not conflict with the rest of the network.
    Potential Drawbacks: 1/16 of the resources might be wasted on that edge, bu= t the poor channel of that edge will be skipped, locally.
    Important Strength: The overhead of this scheme is low.

    Best wishes,
    puoria

    1. IEC 62734: Industrial communication networks - Fieldbus specifications -= Wireless systems for industrial automation: process control and related ap= plications - ISA100.11a.

    -----Original Message-----
    From: 6tsch-bou= nces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Prof. Diego Dujovne
    Sent: Friday, September 13, 2013 9:07 PM
    To: Qin Wang
    Cc: Thomas Watteyne; 6TSCH
    Subject: Re: [6tsch] report flow contents

    Hi Qin,
    =A0 =A0 =A0 =A0 =A0 On the centralized case, changing the channel hopping s= equence (and thus blacklisting the channels with interference) on the whole= network, and not in a peer basis is not efficient in terms of channel usag= e. Let me explain this with an
    example:

    Let's say there is are 4 nodes: A, B, C and D. A and B are interfered o= nly on channel 4 by an external source, while C and D listen interference o= nly on channel 8. If I disable channel 4 and 8 by blacklisting both channel= s from the hopping sequence, A and B won't be able to use channel 8 and C and D won't be able to use ch= annel 4, both interference free between them.

    On the distributed case, if two nodes are already connected and if both det= ect a interfered channel they will (someway) agree to blacklist that channe= l from the hopping sequence. But we have not arrived to this case yet on 6T= iSCH.

    On the other side, if we blacklist by changing the hopping sequence, a node= talking to different neighbours will have different channel hopping sequen= ces. And this increases complexity too.

    I don't have an answer (just questions) on how to reduce the probabilit= y of using an interfered channel, but it seems that the current tsch scheme= does not allow a simple way to blacklist channels unless it is done networ= k-wide. To sum up, I'm worrying about reducing channel diversity.

    Thoughts?

    =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0Diego






    2013/9/13 Qin Wang <qinwang@berkeley.edu>:
    > Hi Diego,
    >
    > I understand, theoretically, dynamic allocation may have some
    > advantages in terms of increasing reliability. But, in the channel
    > hopping network, it is challenge for a node to catch up the channel > hopping sequence change in its neighbors. Thus, I think, if updating > channel hopping sequence, it could be better to do it in network wide.= What do you think?
    >
    > Thanks
    > Qin
    >
    >
    > On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne
    > <die= go.dujovne@mail.udp.cl> wrote:
    >>
    >> Qin,
    >> =A0 =A0 =A0 I think frequency blacklisting on a node-pair basis (e= ither
    >> centralized or distributed) would break the schedule matrix
    >> structure, which overrides narrowband interference by channel
    >> hopping.
    >> If frequencies are blacklisted on all slots, that would waste
    >> resources. Narrowband interference can harm the link locally, but = the
    >> same frequency may be interference-free in other parts of the net.=
    >> =A0 =A0 =A0 The dynamic allocation I propose was only an example. = If you
    >> have 16 frequencies and 2 of them have interference, and the chann= el
    >> offset is sequential, you may loose 2 packets every 16. Am I right= on
    >> this?
    >>
    >> Thoughts?
    >>
    >> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Diego
    >>
    >>
    >> 2013/9/13 Qin Wang <qinwang@berkeley.edu>:
    >> > Thomas,
    >> >
    >> > I agree with you that it is not clear what is the advantage a= nd
    >> > disadvantage of adaptive channel hopping in reality.
    >> >
    >> > In mind, based on the per-frequency report, PCE can do two th= ings:
    >> > (1) update channel hopping sequence is a frequency is really = bad
    >> > network wide;
    >> > (2) avoid use some bad channel when it runs cell allocation a= lgorithm.
    >> > The
    >> > two things happen in PCE, so, will not make negative impact o= n the
    >> > network.
    >> > Thought?
    >> >
    >> > Thanks
    >> >
    >> > Qin
    >> >
    >> >
    >> >
    >> >
    >> > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne
    >> > <watteyne@eecs.berkeley.edu> wrote:
    >> >>
    >> >> Qin, Diego,
    >> >>
    >> >> My 2 cents. I agree with you that it would be nice for th= e PCE to
    >> >> be able to get some per-channel information. Although ada= ptive
    >> >> channel hopping (i.e.
    >> >> selectively blacklisting frequencies for a specific bundl= e) is
    >> >> appealing in principle, it's unclear (at least to me)= whether the
    >> >> gains clearly outweigh the overhead (complexity, signalig= n
    >> >> traffic) one has to pay to coordinate this [1-5].
    >> >>
    >> >> My opinion is that we should enable both metrics averages= over all
    >> >> channels, and per-channel metrics. In some configurations= , one can
    >> >> imagine gathering the former by default, and querying for= the
    >> >> latter on specific occasions. Having the option of gather= ing
    >> >> per-channel information does enable us to be future-proof= against
    >> >> future adaptive channel hopping algorithm.
    >> >>
    >> >> For sure, this makes for a great question: how do a pair = of motes
    >> >> and the PCE have to communicate to enable adaptive channe= l hopping
    >> >> on that link? The answer to that might directly impact th= e
    >> >> application payload formats we have are talking about. Is= this
    >> >> something you be interested in looking further into?
    >> >>
    >> >> Thomas
    >> >>
    >> >> [1] A Decentralized Scheduling Algorithm for Time Synchro= nized
    >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pist= er, Alexandre M.
    >> >> Bayen.
    >> >> ICST Transactions on Mobile Communications and Applicatio= ns, 11(7-9).
    >> >> European Union Digital Library link.
    >> >> doi:10.4108/icst.trans.mca.2011.e5.
    >> >> September 2011.
    >> >> [2] A Decentralized Scheduling Algorithm for Time Synchro= nized
    >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pist= er.
    >> >> International Conference on Ad Hoc Networks (ADHOCNETS), = Victoria,
    >> >> BC, Canada, 18-20 August 2010.
    >> >> [3] Mitigating Multipath Fading Through Channel Hopping i= n
    >> >> Wireless Sensor Networks. Thomas Watteyne, Steven Lanzise= ra, Ankur
    >> >> Mehta, Kris Pister.
    >> >> IEEE
    >> >> International Conference on Communications (ICC), Cape To= wn, South
    >> >> Africa,
    >> >> 23-27 May, 2010.
    >> >> [4] Feasibility Analysis of Controller Design for Adaptiv= e Channel
    >> >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco,= Steven
    >> >> Glaser, Kris Pister. First International Workshop on Perf= ormance
    >> >> Methodologies and Tools for Wireless Sensor Networks (WSN= Perf),
    >> >> Pisa, Italy, 23 October 2009.
    >> >> [5] Reliability Through Frequency Diversity: Why Channel = Hopping
    >> >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. S= ixth ACM
    >> >> International Symposium on Performance Evaluation of Wire= less Ad
    >> >> Hoc, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife= , Canary
    >> >> Islands, Spain, 26-30 October 2009.
    >> >>
    >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne
    >> >> <diego.dujovne@mail.udp.cl> wrote:
    >> >>>
    >> >>> Hello Qin,
    >> >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 I think that a per-freque= ncy report will help the
    >> >>> PCE to decide which frequency to use, and maybe tempo= rarily
    >> >>> black-list them. For example, a dynamic scheme may in= clude
    >> >>> sampling the blacklisted frequencies every X minutes = to re-enable
    >> >>> them once the interference has disappeared.
    >> >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0This will require the node= to refresh the RSSI and
    >> >>> LQI values in a opportunistic way (every time the a c= ell uses
    >> >>> that frequency) to save energy.
    >> >>>
    >> >>> Any thoughts?
    >> >>>
    >> >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 Diego
    >> >>
    >> >>
    >> >> _______________________________________________
    >> >> 6tsch mailing list
    >> >> 6tsch= @ietf.org
    >> >> https://www.ietf.org/mailman/listinfo/6tsch
    >> >>
    >> >
    >> >
    >> > _______________________________________________
    >> > 6tsch mailing list
    >> > 6tsch@iet= f.org
    >> > https://www.ietf.org/mailman/listinfo/6tsch
    >> >
    >>
    >>
    >>
    >> --
    >> DIEGO DUJOVNE
    >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunic= aciones
    >> Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl
    >> (56 2) 676 8125
    >
    >



    --
    DIEGO DUJOVNE
    Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP
    www.ingenieria.u= dp.cl
    (56 2) 676 8125
    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch



    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch


    --001a11c30a84934a0604e686f675-- From twatteyne@gmail.com Tue Sep 17 19:00:11 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0C4CD11E8176 for <6tsch@ietfa.amsl.com>; Tue, 17 Sep 2013 19:00:11 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.589 X-Spam-Level: X-Spam-Status: No, score=-0.589 tagged_above=-999 required=5 tests=[AWL=-0.471, BAYES_20=-0.74, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LaNwrZWTeFIj for <6tsch@ietfa.amsl.com>; Tue, 17 Sep 2013 19:00:10 -0700 (PDT) Received: from mail-ee0-x229.google.com (mail-ee0-x229.google.com [IPv6:2a00:1450:4013:c00::229]) by ietfa.amsl.com (Postfix) with ESMTP id 8383611E80E2 for <6tsch@ietf.org>; Tue, 17 Sep 2013 19:00:06 -0700 (PDT) Received: by mail-ee0-f41.google.com with SMTP id d17so3160158eek.0 for <6tsch@ietf.org>; Tue, 17 Sep 2013 19:00:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=12c9ILOHEfAYk2v9ere4kKLqcdMErIWsaLhBk6gaagA=; b=lZiJzb/0P4xvE8xGi9puTNHjA1qxcUwxGSOoZGnOX4XGF71U+bs8nThZAjJduO/QcP IC8OLMzQCOllXrAG0FKKDJ//hYZl4HfmOnWs5HWc8gCw7dG0koXHf5kIDGYdgmUrShL/ 3YqZbQlFvoYQuVx+Oz8cBy6lEjhohQKVfbG9TugI6Nx0PRsRmW8Sq/t8yP0bucMpRpUI tO7SBG0/CqKOHDICJIPDdb99izxn8BRabWj3TI6MtmUXoJtUBLUN8t3smg/0pUqNFs3g V4lbbK96b4NuImr4LAjrzVOrPZ8ZlR967afOPUpkZvXtP4xA6xQQ8ur5+uANRAOwRDYC B4Ow== X-Received: by 10.14.184.3 with SMTP id r3mr8346441eem.49.1379469605539; Tue, 17 Sep 2013 19:00:05 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.14.119.73 with HTTP; Tue, 17 Sep 2013 18:59:44 -0700 (PDT) In-Reply-To: <0657BDCA-2F2A-4D30-B6C8-86132595BEAE@linear.com> References: <0657BDCA-2F2A-4D30-B6C8-86132595BEAE@linear.com> From: Thomas Watteyne Date: Tue, 17 Sep 2013 18:59:44 -0700 X-Google-Sender-Auth: wKERo0onD8TpJ07G0g99dDj2cTM Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b34386ad1327504e69ecbfc Subject: [6tsch] Fwd: 6TiSCH: about join priority in IEEE802.15.4e X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Sep 2013 02:00:11 -0000 --047d7b34386ad1327504e69ecbfc Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable All, Please find below an e-mail exchange I had with Jonathan Simon, co-editor of the IEEE802.15.4e standard. He is confirming that driving the join priority field in the enhanced beacons from an upper layer does not break standards-compliance, which is great news. His second point is also very interesting: we could use just the "integer" portion of the rank in the join priority, so that the value announced is roughly equivalent to a hop count. Would that work? Thomas ---------- Forwarded message ---------- From: Jonathan Simon Date: Tue, Sep 17, 2013 at 10:14 AM Subject: Re: 6TiSCH: about join priority in IEEE802.15.4e To: Thomas Watteyne Thomas - The join priority was intended to be used in the way you describe. Note that join priority is described somewhat vaguely in the text - the spec does not say what to use it for other beyond a MAC management layer function of selecting a prospective parent, and no service primitives are described to set or change it. The spec does not use the proscriptive "shall" or "must" language, and I certainly intended it as a default in absence of other upper layer methods to manage it. So as to 1), updating the join priority to reflect a node's actual position in the network rather than its "birth" position is a good idea. WirelessHART has this capability. For 2), the important thing is that all devices in the network should be using join priority in the same way to avoid confusion. Making the objective function scale in integer hops seems intuitive and simple and matches the default description, but if each device was n "hops" from its parent, it would serve the same purpose. Hope this answers your questions. Feel free to forward this to the 6TiSCH group. Jonathan -- Jonathan Simon, Ph. D Director of Systems Engineering Linear Technology, Dust Networks product group 30695 Huntwood Ave Hayward, CA 94544-7021 (510) 400-2936 (510) 489-3799 FAX jsimon@linear.com **LINEAR TECHNOLOGY CORPORATION** *****Internet Email Confidentiality Notice***** This e-mail transmission, and any documents, files or previous e-mail messages attached to it may contain confidential information that is legally privileged. If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, distribution or use of any of the information contained in or attached to this transmission is STRICTLY PROHIBITED. If you have received this transmission in error, please immediately notify me by reply e-mail, or by telephone at (510) 400-2936, and destroy the original transmission and its attachments without reading or saving in any manner. Thank you. On Sep 12, 2013, at 12:53 PM, Thomas Watteyne wrote: Jonathan, We are discussing the interaction between IEEE802.15.4e and the RPL routing protocol in the 6TiSCH group (see minutes last call at [1]). We have some questions about the "Join Priority" field in the IEEE802.15.4e EB, in particular about how much an upper layer (6top [2]) can influence its value. We want to make sure that we do not break compliance with the IEEE802.15.4e standard. For reference, this is the text in IEEE802.15.4e (p.90): The 1-octet Join Priority field can be used by a joining device to select among beaconing devices when multiple beacons are heard. The PAN coordinator=92s join priority is zero. A lower value of join priority indicates that the device is the preferred one to connect to. The beaconing device=92s join priority is the lowest join priority heard when it joined t= he network plus one. We have the following discussions: 1. After a node has joined, it might be moving to a different topological location. In that case, it should update the Join Priority i= t is announcing. Luckily, RPL maintains the node's rank, a concept very similar to join priority. *Question*: Can we have the 6top change the priority announced by IEEE802.15.4e to the RPL rank (or a number calculated from the RPL rank) after the node has joined? 2. RPL is very flexible about how rank is calculated. Depending on the Objective Function used, the rank can be calculated differently. In particular, the difference of the rank between a node and routing parent can be different from 1. *Question*: Can the join priority announced by node and its parent be different by more than 1? Your input is very welcome, Thomas [1] https://bitbucket.org/6tsch/meetings/wiki/130906_webex [2] http://tools.ietf.org/html/draft-wang-6tsch-6top-00 --047d7b34386ad1327504e69ecbfc Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
    All,

    Please find below an e-mail exchan= ge I had with Jonathan Simon, co-editor of the IEEE802.15.4e standard. He i= s confirming that driving the join priority field in the enhanced beacons f= rom an upper layer does not break standards-compliance, which is great news= .

    His second point is also very interesting: we could use= just the "integer" portion of the rank in the join priority, so = that the value announced is roughly equivalent to a hop count.

    Would that work?

    Thomas

    ---------- Forwarded message ----------
    From: Jonathan Simon <jsimon@linear.com>
    Date: Tue, Sep 17, 2013 at 10:14 AM
    Subject: Re: 6TiSCH: about join prio= rity in IEEE802.15.4e
    To: Thomas Watteyne <watteyne@eecs.berkeley.edu>


    Thomas - =A0The join priority was intended to be used in the way you descri= be. =A0Note that join priority is described somewhat vaguely in the text -= =A0the spec does not say what to use it for other beyond a MAC management l= ayer function of selecting a prospective parent, and no service primitives = are described to set or change it. =A0 The spec=A0does not use the proscrip= tive "shall" or "must" language, and I certainly intend= ed it as a default in absence of other upper layer methods to manage it. = =A0

    So as to 1), updating the join priority to reflect a node= 9;s actual position in the network rather than its "birth" positi= on is a good idea. =A0WirelessHART has this capability.
    For 2), = =A0the important thing is that all devices in the network should be using j= oin priority in the same way to avoid confusion. Making the objective funct= ion scale in integer hops seems intuitive and simple and matches the defaul= t description, but if each device was n "hops" from its parent, i= t would serve the same purpose.

    Hope this answers your questions. Feel free to for= ward this to the 6TiSCH group.

    Jonathan
    --=A0
    Jonathan Simon, Ph. D
    Director of Systems Engineering
    Linear= Technology, Dust Networks product group
    30695 Huntwood Ave
    Hayward, = CA 94544-7021
    (510) 400-2936
    (510) 489-3799 FAX
    jsimon@linear.com

    **LINEAR TECHNOLOGY=A0CORPORATION**= =A0
    *****Internet Email Confidentiality=A0Notice*****=A0
    =A0This e-mail transmission, and any=A0documents, files or previous e-mail= =A0messages attached to it may contain=A0confidential information that is= =A0legally privileged. If you are not the=A0intended recipient, or a person= =A0responsible for delivering it to the=A0intended recipient, you are hereb= y=A0notified that any disclosure, copying,=A0distribution or use of any of = the=A0information contained in or attached=A0to this transmission is STRICT= LY=A0PROHIBITED. If you have received this=A0transmission in error, please= =A0immediately notify me by reply e-mail, or by telephone at (510) 400-2= 936, and destroy the original=A0transmission and its attachments=A0with= out reading or saving in any=A0manner. Thank you.=A0

    On Sep 12, 2013, at 12:53 PM, Thomas Watteyne wrote:
    Jonathan,

    We= are discussing the interaction between IEEE802.15.4e and the RPL routing p= rotocol in the 6TiSCH group (see minutes last call at [1]).

    We have some questions about the "Join Priority&qu= ot; field in the IEEE802.15.4e EB, in particular about how much an upper la= yer (6top [2]) can influence its value. We want to make sure that we do not= break compliance with the IEEE802.15.4e standard.

    For reference, this is the text in IEEE802.15.4e (p.90)= :

    The 1-octet Join Priority field can be used by a joining d= evice to select among beaco= ning devices when multiple beacons are heard. The PAN coordinator=92s join priority is zero. A lower value of join priority indicates that the device is the prefer= red one to connect to. The beaconing device=92s join priority is the lowest join priority heard when i= t joined the network plus one.

    We have the following discussions:
    1. After a node has joined, it might be moving to a different topolog= ical location. In that case, it should update the Join Priority it is annou= ncing. Luckily, RPL maintains the node's rank, a concept very similar t= o join priority.
      Question: Can we have the 6top change the priority announced = by IEEE802.15.4e to the RPL rank (or a number calculated from the RPL rank)= after the node has joined?
    2. RPL is very flexible about how rank is = calculated. Depending on the Objective Function used, the rank can be calcu= lated differently. In particular, the difference of the rank between a node= and routing parent can be different from 1.
      Question: Can the join priority announced by node and its par= ent be different by more than 1?
    Your input is very welco= me,

    Thomas



    --047d7b34386ad1327504e69ecbfc-- From twatteyne@gmail.com Tue Sep 17 19:24:50 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AE2ED11E80F2 for <6tsch@ietfa.amsl.com>; Tue, 17 Sep 2013 19:24:50 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.471 X-Spam-Level: X-Spam-Status: No, score=-1.471 tagged_above=-999 required=5 tests=[AWL=0.506, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sl799PrmQ+pJ for <6tsch@ietfa.amsl.com>; Tue, 17 Sep 2013 19:24:49 -0700 (PDT) Received: from mail-ea0-x234.google.com (mail-ea0-x234.google.com [IPv6:2a00:1450:4013:c01::234]) by ietfa.amsl.com (Postfix) with ESMTP id 00DCD11E8155 for <6tsch@ietf.org>; Tue, 17 Sep 2013 19:24:22 -0700 (PDT) Received: by mail-ea0-f180.google.com with SMTP id h10so3151339eaj.11 for <6tsch@ietf.org>; Tue, 17 Sep 2013 19:24:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=qxunM6LvH3uJxtaP3HWQVBm+dB8HIrVJQVuUDhXElN8=; b=GTZE12oIsr3LFMEVlQPGQkDuvDDS0u8UOLE2PZdQOd5PcInHA2W9CDUvCvA8xrEyQt AvKThy1hl0G3AvD/nKQ50tDvZyZPOHbqYeuqTmTIGypwRuAMQNuSwyo4zaPbszNIMa8m Hkky83HHmpuDCsnGapHcv4e56ASNZkU/vvobwYA+dMxvCnhdSMyMGACSs3jVRA3xa8PW wwBYVx4j7Eog6aywLdDcYf/UBt+HGOZnro0j8D+uudSaspuvB01Ob/IasKFcJpIN4dy7 SjfYKnOF7k0k7I/CBP2IuO325PYaMPw6ytKambdTVZJC5bSFNEVAyRT2e1WPic1QhK3V kmtQ== X-Received: by 10.14.224.198 with SMTP id x46mr124433eep.53.1379471062085; Tue, 17 Sep 2013 19:24:22 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.14.119.73 with HTTP; Tue, 17 Sep 2013 19:24:02 -0700 (PDT) In-Reply-To: <1379134561.87069.YahooMailNeo@web121105.mail.ne1.yahoo.com> References: <1379134067.81607.YahooMailNeo@web121105.mail.ne1.yahoo.com> <1379134561.87069.YahooMailNeo@web121105.mail.ne1.yahoo.com> From: Thomas Watteyne Date: Tue, 17 Sep 2013 19:24:02 -0700 X-Google-Sender-Auth: YrNHDsy6qRiPJF8LNHoJEEmYidY Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b66f28ba2529304e69f22f8 Subject: Re: [6tsch] scheduling of cells X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Sep 2013 02:24:50 -0000 --047d7b66f28ba2529304e69f22f8 Content-Type: text/plain; charset=ISO-8859-1 Mehdi, The IEEE802.15.4e standard [1] allows you to put information about the cells to use in two places: - as part of the the "TSCH Slotframe and Link" Information Element, directly inside the Enhanced Beacon (EB). I believe the EB is what you call advertisement. You can use this method indicate to a joining nodes a minimal set of cells to contact the network, which will then install more permanent cells. - as part of an upper-layer protocol, which it what we are currently discussing in the 6TiSCH group. This protocol would allow either a central PCE, or a distributed scheduling entity to contact a node and give it the list of cells to install. This is hopefully clearly explained in draft-watteyne-6tsch-tsch-lln-context [2] As detailed in our charter [3], the 6TiSCH is cutting the problem in two steps: - in the first step, we only consider the minimal set of cells to enable communication. This is detailed in draft-vilajosana-6tsch-basic [4], and one could imagine that this cells are installed through the EBs - in a second step, the PCE learns about the nodes in the network, and installs the necessary cells using this higher-level protocol [5]. We are currently discussing CoAP and CBOR as candidates for that protocol. I hope this answers your question, Thomas [1] http://standards.ieee.org/getieee802/download/802.15.4e-2012.pdf [2] http://tools.ietf.org/html/draft-watteyne-6tsch-tsch-lln-context-02 [3] https://datatracker.ietf.org/doc/charter-ietf-6tisch/ [4] http://tools.ietf.org/html/draft-vilajosana-6tsch-basic-01 [5] http://www.ietf.org/mail-archive/web/6tsch/current/msg01220.html On Fri, Sep 13, 2013 at 9:56 PM, mehdi sabzevari wrote: > Ohhhh... Excuse me > Previously thanks for your response. :) > > Mehdi > > ------------------------------ > *From:* mehdi sabzevari > *To:* "6tsch@ietf.org" <6tsch@ietf.org>; "twatteyne@gmail.com" < > twatteyne@gmail.com> > *Sent:* Saturday, September 14, 2013 9:17 AM > *Subject:* [6tsch] scheduling of cells > > Hi All > I have a question about scheduling of cell as shared/dedicated, Previously > thanks for your request. :) > What is the best time(place) for scheduling a cell as shared/dedicated? > Can it be scheduled by advertisement? or It should be schedule before > communication of peers? > > > Regards > Mehdi > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > > --047d7b66f28ba2529304e69f22f8 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Mehdi,

    The IEEE802.15.4e standard [1] a= llows you to put information about the cells to use in two places:
    - as part of the the "TSCH Slotframe and Link" Information Elem= ent, directly inside the Enhanced Beacon (EB). I believe the EB is what you= call advertisement. You can use this method indicate to a joining nodes a = minimal set of cells to contact the network, which will then install more p= ermanent cells.
    - as part of an upper-layer protocol, which it what we are currently d= iscussing in the 6TiSCH group. This protocol would allow either a central P= CE, or a distributed scheduling entity to contact a node and give it the li= st of cells to install.

    This is hopefully clearly explained in draft-watteyne-6= tsch-tsch-lln-context [2]

    As detailed in our chart= er [3], the 6TiSCH is cutting the problem in two steps:
    - in the = first step, we only consider the minimal set of cells to enable communicati= on. This is detailed in=A0draft-vilajosana-6tsch-basic [4], and one could i= magine that this cells are installed through the EBs
    - in a second step, the PCE learns about the nodes in the network, and= installs the necessary cells using this higher-level protocol [5]. We are = currently discussing CoAP and CBOR as candidates for that protocol.

    I hope this answers your question,


    On Fri,= Sep 13, 2013 at 9:56 PM, mehdi sabzevari <mehdi.sabzevari@yahoo.c= om> wrote:
    Ohhhh... Excuse me
    Prev= iously thanks for your response. :)

    Mehdi

    From: mehdi sabzevar= i <mehdi.= sabzevari@yahoo.com>
    To: "6tsch@ietf.org" <6tsch@ietf.org>; "twatteyne@gmail.com" <twatte= yne@gmail.com>
    Sent: Saturday, September 1= 4, 2013 9:17 AM
    Subject:= [6tsch] scheduling of cells

    Hi All
    I have a question a= bout scheduling of cell as shared/dedicated, Previously thanks for your req= uest. :)
    =A0What is the best time(place) for scheduling a cell as shared/dedica= ted? Can it be scheduled by advertisement? or It should be schedule before communication of peers?


    Regards
    Mehdi


    ______= _________________________________________
    6tsch mailing list
    6= tsch@ietf.org
    https://www.ietf.org/mailman/listinfo/6tsch

    =

    --047d7b66f28ba2529304e69f22f8-- From twatteyne@gmail.com Tue Sep 17 19:31:06 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D40E311E8189 for <6tsch@ietfa.amsl.com>; Tue, 17 Sep 2013 19:31:06 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.517 X-Spam-Level: X-Spam-Status: No, score=-1.517 tagged_above=-999 required=5 tests=[AWL=0.460, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id OxJCuYAGrbKH for <6tsch@ietfa.amsl.com>; Tue, 17 Sep 2013 19:31:04 -0700 (PDT) Received: from mail-ea0-x229.google.com (mail-ea0-x229.google.com [IPv6:2a00:1450:4013:c01::229]) by ietfa.amsl.com (Postfix) with ESMTP id 0C55311E8168 for <6tsch@ietf.org>; Tue, 17 Sep 2013 19:31:03 -0700 (PDT) Received: by mail-ea0-f169.google.com with SMTP id k11so3177806eaj.0 for <6tsch@ietf.org>; Tue, 17 Sep 2013 19:31:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=38w6V1ctYvrHwmF0AqgYBSl71ddvBQ2Ox2eUWlyQT80=; b=wAt+HamHu4mOtZ2ukDL1BkYx6Q912wwYgtYyXdFT87x8WnS9moXamGIWdCEDCiHg60 POw0Aq1HmrWrj1rt/6yM4VcanlD1DEBwi1O2eZUqZHG74oOT7gpJVwNjtva10P62W/6H adKGNXupEb6IeYQDavcWL1O1rH8TBtwkpfO9Ktk2bLeE6l5Tom/ZGiOi9ppQ15a6fK5P QF3STQ0Cd+6GTwn6Yp/zs3odOers3I30L42B4SGoYszHcF4olyCXnITX5xNapOk87tNX bp39S4nxjn3+3krmF2Phlg1Rb7qAzC9ZnAA/5V5FXLDVkMRlkigwUtoQlVJI5sGraPY2 3OYw== X-Received: by 10.15.111.132 with SMTP id cj4mr159106eeb.56.1379471463091; Tue, 17 Sep 2013 19:31:03 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.14.119.73 with HTTP; Tue, 17 Sep 2013 19:30:42 -0700 (PDT) In-Reply-To: References: From: Thomas Watteyne Date: Tue, 17 Sep 2013 19:30:42 -0700 X-Google-Sender-Auth: KqkR67XWqHcOThqtDgT_PqzBx10 Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=089e0163547c8933d104e69f3afb Subject: Re: [6tsch] blacklisting (was "report flow contents") X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Sep 2013 02:31:06 -0000 --089e0163547c8933d104e69f3afb Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable *> (1) Network wide blacklisting can be used to avoid some frequencies occupied by other networks in the same area.* Agreed. *> (2) Per-link blacklisting can be used when overprovision is applied.* Agreed. In a centralized case, the PCE could (1) monitor per-channel statistics on a bundle, (2) over-provision, (3) blacklist. It would be very interesting to evaluate what the cost vs. benefits are if this is used (a great academic project!). I believe we should have the mechanisms to be able to do this in the future, if it turns out it's worthwhile the signal overhead. Thomas On Mon, Sep 16, 2013 at 2:34 PM, Qin Wang wrote: > Hi Thomas, > > I fully agree with you. + 2 more comments. > > (1) Network wide blacklisting can be used to avoid some frequencies > occupied by other networks in the same area. > > (2) Per-link blacklisting can be used when overprovision is applied. For > example, we need the bandwidth from nodeA to nodeB is 15 cells per > slotframe. Assume it is known that channel-22 is very bad, and others are > in good condition. Then, we can schedule 16 cells in one slotframe, and > skip channel-22 every time when encountering it. > > What do you think? > > Thanks > Qin > > > On Tue, Sep 17, 2013 at 2:16 AM, Thomas Watteyne < > watteyne@eecs.berkeley.edu> wrote: > >> *[changed thread subject from 'report flow contents' to 'blacklisting >> (was "report flow contents")']* >> >> All, >> >> Great discussion! >> >> Allow me to sum up. >> >> Problem statement: >> >> - At 2.4GHz, 16 orthogonal frequencies are available. >> - "blind" channel hopping exploits frequencies diversity by hopping >> on all 16 frequencies >> - because of interference and multi-path fading, some frequencies >> exhibit a worse Packet Delivery Ratio (PFD) than others >> - if because of interference, it is possible that same set of >> frequencies are "bad" in the whole network >> - if because of multi-path fading, the set of "bad" frequencies is >> different for every pair of neighbor nodes >> >> Network-wide blacklisting: >> >> - goal: prevent all nodes in the network to use a given frequency >> - decision can be made by PCE after receiving statistics, or >> administratively by operator configuration >> - different mechanisms to blacklist a channel: >> - modify the hopping pattern to include the same frequency twice >> and remove another one. Can be done on-the-fly. >> - consider there are only 15 frequencies, and build a schedule >> with 15 channel offsets. Needs to be done before network starts (o= r long >> process of "freeing-up" one channel offset) >> - efficiency is limited since: >> - because of multi-path fading, a "bad" channel might not be bad >> for all bundles >> - limits frequency diversity >> >> Per-link blacklisting: >> >> - goal: prevent a bundle (i.e. two neighbors scheduled to >> communicate) to use a given frequency >> - decision can be made based on the per-frequency statistics gathered >> (packet counters and/or RSSI/LQI) >> - problem: >> - changing the hopping pattern for a single bundle can create >> interference with other bundles since collisions are possible if h= opping on >> different sets of frequencies. >> - solution (used by ISA100): >> - cancel a scheduled communication if that communication happens >> on the blacklisted channel >> - note that this will reduce the bandwidth of that bundle by 1/16, >> so needs possibly to be combined with adding 1/16 more cells to th= at bundle. >> >> Did I miss something? >> >> Thomas >> >> >> On Mon, Sep 16, 2013 at 9:35 AM, wrote: >> >>> Hi Qin, >>> >>> "Link-by-link" adaptive channel hopping in ISA is used by a node to >>> select the best frequencies for its further communication with its >>> particular neighbor. >>> And, cell over-provision (i.e. the combination of "channel offset" and >>> "slot" info used for communication with a particular neighbor), might b= e >>> used for evaluating the internal interference and BW requirements betwe= en >>> two neighbors. Am I right? >>> >>> Best wishes, >>> Pouria Zand >>> >>> On Sep 16, 2013, at 4:34 PM, "Qin Wang" wrote: >>> >>> Hi Pouria and Diego, >>> >>> I think the "link-by-link" adaptive channel hopping mechanism of >>> ISA100.11a AND cell over-provision mechanism of 6top can be used togeth= er. >>> Make sense? >>> >>> Thanks >>> Qin >>> >>> >>> On Mon, Sep 16, 2013 at 8:56 AM, wrote: >>> >>>> Hi Diego, >>>> >>>> ISA100.11a considers the adaptive channel hopping on a link-by-link >>>> basis, in addition to traditional blacklisting on the whole network. T= his >>>> mechanism is described as following: >>>> >>>> "Additionally, a device may autonomously treat transmit links on >>>> problematic channels as idle, thus reducing unnecessary interference a= nd >>>> wasted energy on channels with a history of poor connectivity. A devic= e >>>> skipping links in this manner should periodically test the links to ve= rify >>>> that they remain problematic. Such selective channel utilization can b= e >>>> disabled by the system manager on a link-by-link basis, through the >>>> attribute dlmo.Link[].Type.SelectiveAllowed. [1]" >>>> >>>> In this scheme, the sender/receiver consider the poor channel as idle. >>>> The sender and receiver (on the poor edge) will still follow the defin= ed >>>> hopping pattern and they will not conflict with the rest of the networ= k. >>>> Potential Drawbacks: 1/16 of the resources might be wasted on that >>>> edge, but the poor channel of that edge will be skipped, locally. >>>> Important Strength: The overhead of this scheme is low. >>>> >>>> Best wishes, >>>> puoria >>>> >>>> 1. IEC 62734: Industrial communication networks - Fieldbus >>>> specifications - Wireless systems for industrial automation: process >>>> control and related applications - ISA100.11a. >>>> >>>> -----Original Message----- >>>> From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf >>>> Of Prof. Diego Dujovne >>>> Sent: Friday, September 13, 2013 9:07 PM >>>> To: Qin Wang >>>> Cc: Thomas Watteyne; 6TSCH >>>> Subject: Re: [6tsch] report flow contents >>>> >>>> Hi Qin, >>>> On the centralized case, changing the channel hopping >>>> sequence (and thus blacklisting the channels with interference) on the >>>> whole network, and not in a peer basis is not efficient in terms of ch= annel >>>> usage. Let me explain this with an >>>> example: >>>> >>>> Let's say there is are 4 nodes: A, B, C and D. A and B are interfered >>>> only on channel 4 by an external source, while C and D listen interfer= ence >>>> only on channel 8. If I disable channel 4 and 8 by blacklisting both >>>> channels from the hopping sequence, A and B won't be able to use chann= el 8 >>>> and C and D won't be able to use channel 4, both interference free bet= ween >>>> them. >>>> >>>> On the distributed case, if two nodes are already connected and if bot= h >>>> detect a interfered channel they will (someway) agree to blacklist tha= t >>>> channel from the hopping sequence. But we have not arrived to this cas= e yet >>>> on 6TiSCH. >>>> >>>> On the other side, if we blacklist by changing the hopping sequence, a >>>> node talking to different neighbours will have different channel hoppi= ng >>>> sequences. And this increases complexity too. >>>> >>>> I don't have an answer (just questions) on how to reduce the >>>> probability of using an interfered channel, but it seems that the curr= ent >>>> tsch scheme does not allow a simple way to blacklist channels unless i= t is >>>> done network-wide. To sum up, I'm worrying about reducing channel dive= rsity. >>>> >>>> Thoughts? >>>> >>>> Diego >>>> >>>> >>>> >>>> >>>> >>>> >>>> 2013/9/13 Qin Wang : >>>> > Hi Diego, >>>> > >>>> > I understand, theoretically, dynamic allocation may have some >>>> > advantages in terms of increasing reliability. But, in the channel >>>> > hopping network, it is challenge for a node to catch up the channel >>>> > hopping sequence change in its neighbors. Thus, I think, if updating >>>> > channel hopping sequence, it could be better to do it in network >>>> wide. What do you think? >>>> > >>>> > Thanks >>>> > Qin >>>> > >>>> > >>>> > On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne >>>> > wrote: >>>> >> >>>> >> Qin, >>>> >> I think frequency blacklisting on a node-pair basis (either >>>> >> centralized or distributed) would break the schedule matrix >>>> >> structure, which overrides narrowband interference by channel >>>> >> hopping. >>>> >> If frequencies are blacklisted on all slots, that would waste >>>> >> resources. Narrowband interference can harm the link locally, but t= he >>>> >> same frequency may be interference-free in other parts of the net. >>>> >> The dynamic allocation I propose was only an example. If you >>>> >> have 16 frequencies and 2 of them have interference, and the channe= l >>>> >> offset is sequential, you may loose 2 packets every 16. Am I right = on >>>> >> this? >>>> >> >>>> >> Thoughts? >>>> >> >>>> >> Diego >>>> >> >>>> >> >>>> >> 2013/9/13 Qin Wang : >>>> >> > Thomas, >>>> >> > >>>> >> > I agree with you that it is not clear what is the advantage and >>>> >> > disadvantage of adaptive channel hopping in reality. >>>> >> > >>>> >> > In mind, based on the per-frequency report, PCE can do two things= : >>>> >> > (1) update channel hopping sequence is a frequency is really bad >>>> >> > network wide; >>>> >> > (2) avoid use some bad channel when it runs cell allocation >>>> algorithm. >>>> >> > The >>>> >> > two things happen in PCE, so, will not make negative impact on th= e >>>> >> > network. >>>> >> > Thought? >>>> >> > >>>> >> > Thanks >>>> >> > >>>> >> > Qin >>>> >> > >>>> >> > >>>> >> > >>>> >> > >>>> >> > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne >>>> >> > wrote: >>>> >> >> >>>> >> >> Qin, Diego, >>>> >> >> >>>> >> >> My 2 cents. I agree with you that it would be nice for the PCE t= o >>>> >> >> be able to get some per-channel information. Although adaptive >>>> >> >> channel hopping (i.e. >>>> >> >> selectively blacklisting frequencies for a specific bundle) is >>>> >> >> appealing in principle, it's unclear (at least to me) whether th= e >>>> >> >> gains clearly outweigh the overhead (complexity, signalign >>>> >> >> traffic) one has to pay to coordinate this [1-5]. >>>> >> >> >>>> >> >> My opinion is that we should enable both metrics averages over a= ll >>>> >> >> channels, and per-channel metrics. In some configurations, one c= an >>>> >> >> imagine gathering the former by default, and querying for the >>>> >> >> latter on specific occasions. Having the option of gathering >>>> >> >> per-channel information does enable us to be future-proof agains= t >>>> >> >> future adaptive channel hopping algorithm. >>>> >> >> >>>> >> >> For sure, this makes for a great question: how do a pair of mote= s >>>> >> >> and the PCE have to communicate to enable adaptive channel hoppi= ng >>>> >> >> on that link? The answer to that might directly impact the >>>> >> >> application payload formats we have are talking about. Is this >>>> >> >> something you be interested in looking further into? >>>> >> >> >>>> >> >> Thomas >>>> >> >> >>>> >> >> [1] A Decentralized Scheduling Algorithm for Time Synchronized >>>> >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister, >>>> Alexandre M. >>>> >> >> Bayen. >>>> >> >> ICST Transactions on Mobile Communications and Applications, >>>> 11(7-9). >>>> >> >> European Union Digital Library link. >>>> >> >> doi:10.4108/icst.trans.mca.2011.e5. >>>> >> >> September 2011. >>>> >> >> [2] A Decentralized Scheduling Algorithm for Time Synchronized >>>> >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pister. >>>> >> >> International Conference on Ad Hoc Networks (ADHOCNETS), Victori= a, >>>> >> >> BC, Canada, 18-20 August 2010. >>>> >> >> [3] Mitigating Multipath Fading Through Channel Hopping in >>>> >> >> Wireless Sensor Networks. Thomas Watteyne, Steven Lanzisera, Ank= ur >>>> >> >> Mehta, Kris Pister. >>>> >> >> IEEE >>>> >> >> International Conference on Communications (ICC), Cape Town, Sou= th >>>> >> >> Africa, >>>> >> >> 23-27 May, 2010. >>>> >> >> [4] Feasibility Analysis of Controller Design for Adaptive Chann= el >>>> >> >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco, Steven >>>> >> >> Glaser, Kris Pister. First International Workshop on Performance >>>> >> >> Methodologies and Tools for Wireless Sensor Networks (WSNPerf), >>>> >> >> Pisa, Italy, 23 October 2009. >>>> >> >> [5] Reliability Through Frequency Diversity: Why Channel Hopping >>>> >> >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. Sixth AC= M >>>> >> >> International Symposium on Performance Evaluation of Wireless Ad >>>> >> >> Hoc, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife, Canar= y >>>> >> >> Islands, Spain, 26-30 October 2009. >>>> >> >> >>>> >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne >>>> >> >> wrote: >>>> >> >>> >>>> >> >>> Hello Qin, >>>> >> >>> I think that a per-frequency report will help the >>>> >> >>> PCE to decide which frequency to use, and maybe temporarily >>>> >> >>> black-list them. For example, a dynamic scheme may include >>>> >> >>> sampling the blacklisted frequencies every X minutes to re-enab= le >>>> >> >>> them once the interference has disappeared. >>>> >> >>> This will require the node to refresh the RSSI and >>>> >> >>> LQI values in a opportunistic way (every time the a cell uses >>>> >> >>> that frequency) to save energy. >>>> >> >>> >>>> >> >>> Any thoughts? >>>> >> >>> >>>> >> >>> Diego >>>> >> >> >>>> >> >> >>>> >> >> _______________________________________________ >>>> >> >> 6tsch mailing list >>>> >> >> 6tsch@ietf.org >>>> >> >> https://www.ietf.org/mailman/listinfo/6tsch >>>> >> >> >>>> >> > >>>> >> > >>>> >> > _______________________________________________ >>>> >> > 6tsch mailing list >>>> >> > 6tsch@ietf.org >>>> >> > https://www.ietf.org/mailman/listinfo/6tsch >>>> >> > >>>> >> >>>> >> >>>> >> >>>> >> -- >>>> >> DIEGO DUJOVNE >>>> >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunica= ciones >>>> >> Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl >>>> >> (56 2) 676 8125 >>>> > >>>> > >>>> >>>> >>>> >>>> -- >>>> DIEGO DUJOVNE >>>> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicacio= nes >>>> Facultad de Ingenier=EDa UDP >>>> www.ingenieria.udp.cl >>>> (56 2) 676 8125 >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch >>>> >>> >>> >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > --089e0163547c8933d104e69f3afb Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    > (1) Network wide blacklisting can be used to avoid= some frequencies occupied by other networks in the same area.
    Agre= ed.

    > (2) Per-link blacklisting can be used = when overprovision is applied.
    Agreed. In a centralized case, the PCE could (1) monitor per-channel s= tatistics on a bundle, (2) over-provision, (3) blacklist. It would be very = interesting to evaluate what the cost vs. benefits are if this is used (a g= reat academic project!). I believe we should have the mechanisms to be able= to do this in the future, if it turns out it's worthwhile the signal o= verhead.

    Thomas

    On Mon, Sep 16, 2013 at 2:34 PM, Qin Wang <qinwang@= berkeley.edu> wrote:
    Hi Thomas,

    I fully agr= ee with you. + 2 more comments.

    (1) Network wide blacklisting can be used to avoid some= frequencies occupied by other networks in the same area.

    (2) Per-link blacklisting can be used when overprovisio= n is applied. For example, we need the bandwidth from nodeA to nodeB is 15 = cells per slotframe. Assume it is known that channel-22 is very bad, and ot= hers are in good condition. Then, we can schedule 16 cells in one slotframe= , and skip channel-22 every time when encountering it.=A0

    What do you think?

    Thanks<= /div>
    Qin


    On Tue, Sep 17, 2013 at= 2:16 AM, Thomas Watteyne <watteyne@eecs.berkeley.edu> wrote:
    [changed thread subject from '= ;report flow contents' to 'blacklisting (was "report flow cont= ents")']

    All,

    Great discussion!

    Allow me to sum up.

    Problem st= atement:
    • At 2.4GHz, 16 orthogonal frequencies are availab= le.
    • "blind" channel hopping exploits frequencies diversit= y by hopping on all 16 frequencies
    • because of interference and multi-path fading, some frequencies exhibit= a worse Packet Delivery Ratio (PFD) than others
      • if because of = interference, it is possible that same set of frequencies are "bad&quo= t; in the whole network
      • if because of multi-path fading, the set of "bad" frequencies= is different for every pair of neighbor nodes
    Net= work-wide blacklisting:
    • goal: prevent all nodes in t= he network to use a given frequency
    • decision can be made by PCE after receiving statistics, or administrati= vely by operator configuration
    • different mechanisms to blacklist a = channel:
      • modify the hopping pattern to include the same frequen= cy twice and remove another one. Can be done on-the-fly.
      • consider there are only 15 frequencies, and build a schedule with 15 ch= annel offsets. Needs to be done before network starts (or long process of &= quot;freeing-up" one channel offset)
    • efficiency is limite= d since:
      • because of multi-path fading, a "bad" channel might not b= e bad for all bundles
      • limits frequency diversity
    Per-link blacklisting:
    • goal: prevent a bundle (i.e. two neighbors scheduled to communicate) to= use a given frequency
    • decision can be made based on the per-freque= ncy statistics gathered (packet counters and/or RSSI/LQI)
    • problem:
      • changing the hopping pattern for a single bundle c= an create interference with other bundles since collisions are possible if = hopping on different sets of frequencies.
    • solution (used by ISA100):
      • cancel a scheduled communication if = that communication happens on the blacklisted channel
      • note that thi= s will reduce the bandwidth of that bundle by 1/16, so needs possibly to be= combined with adding 1/16 more cells to that bundle.
    Did I miss something?

    Tho= mas


    On M= on, Sep 16, 2013 at 9:35 AM, <P.Zand@utwente.nl> wrote:
    Hi Qin,

    "Link-by-link" adaptive channel hopping in ISA is used by a = node to select the best frequencies for its further communication with its = particular neighbor.=A0
    And, cell over-provision (i.e. the combination of "channel offset= " and "slot" info used for communication with a particular n= eighbor), might be used for evaluating the internal interference and BW req= uirements between two neighbors. Am I right?

    Best wishes,
    Pouria Zand

    On Sep 16, 2013, at 4:34 PM, "Qin Wang" <qinwang@berkeley.edu> wrote:
    Hi Pouria and Diego,

    I think the "link-by-link" adaptive channel hopping mechanis= m of ISA100.11a AND cell over-provision mechanism of 6top can be used toget= her. Make sense?

    Thanks
    Qin


    On Mon, Sep 16, 2013 at 8:56 AM, <P.Zand@utwent= e.nl> wrote:
    Hi Diego,

    ISA100.11a considers the adaptive channel hopping on a link-by-link basis, = in addition to traditional blacklisting on the whole network. This mechanis= m is described as following:

    "Additionally, a device may autonomously treat transmit links on probl= ematic channels as idle, thus reducing unnecessary interference and wasted = energy on channels with a history of poor connectivity. A device skipping l= inks in this manner should periodically test the links to verify that they remain problematic. Such selective chan= nel utilization can be disabled by the system manager on a link-by-link bas= is, through the attribute dlmo.Link[].Type.SelectiveAllowed. [1]"

    In this scheme, the sender/receiver consider the poor channel as idle. The = sender and receiver (on the poor edge) will still follow the defined hoppin= g pattern and they will not conflict with the rest of the network.
    Potential Drawbacks: 1/16 of the resources might be wasted on that edge, bu= t the poor channel of that edge will be skipped, locally.
    Important Strength: The overhead of this scheme is low.

    Best wishes,
    puoria

    1. IEC 62734: Industrial communication networks - Fieldbus specifications -= Wireless systems for industrial automation: process control and related ap= plications - ISA100.11a.

    -----Original Message-----
    From: 6tsch-bou= nces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Prof. Diego Dujovne
    Sent: Friday, September 13, 2013 9:07 PM
    To: Qin Wang
    Cc: Thomas Watteyne; 6TSCH
    Subject: Re: [6tsch] report flow contents

    Hi Qin,
    =A0 =A0 =A0 =A0 =A0 On the centralized case, changing the channel hopping s= equence (and thus blacklisting the channels with interference) on the whole= network, and not in a peer basis is not efficient in terms of channel usag= e. Let me explain this with an
    example:

    Let's say there is are 4 nodes: A, B, C and D. A and B are interfered o= nly on channel 4 by an external source, while C and D listen interference o= nly on channel 8. If I disable channel 4 and 8 by blacklisting both channel= s from the hopping sequence, A and B won't be able to use channel 8 and C and D won't be able to use ch= annel 4, both interference free between them.

    On the distributed case, if two nodes are already connected and if both det= ect a interfered channel they will (someway) agree to blacklist that channe= l from the hopping sequence. But we have not arrived to this case yet on 6T= iSCH.

    On the other side, if we blacklist by changing the hopping sequence, a node= talking to different neighbours will have different channel hopping sequen= ces. And this increases complexity too.

    I don't have an answer (just questions) on how to reduce the probabilit= y of using an interfered channel, but it seems that the current tsch scheme= does not allow a simple way to blacklist channels unless it is done networ= k-wide. To sum up, I'm worrying about reducing channel diversity.

    Thoughts?

    =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0Diego






    2013/9/13 Qin Wang <qinwang@berkeley.edu>:
    > Hi Diego,
    >
    > I understand, theoretically, dynamic allocation may have some
    > advantages in terms of increasing reliability. But, in the channel
    > hopping network, it is challenge for a node to catch up the channel > hopping sequence change in its neighbors. Thus, I think, if updating > channel hopping sequence, it could be better to do it in network wide.= What do you think?
    >
    > Thanks
    > Qin
    >
    >
    > On Fri, Sep 13, 2013 at 11:28 PM, Prof. Diego Dujovne
    > <die= go.dujovne@mail.udp.cl> wrote:
    >>
    >> Qin,
    >> =A0 =A0 =A0 I think frequency blacklisting on a node-pair basis (e= ither
    >> centralized or distributed) would break the schedule matrix
    >> structure, which overrides narrowband interference by channel
    >> hopping.
    >> If frequencies are blacklisted on all slots, that would waste
    >> resources. Narrowband interference can harm the link locally, but = the
    >> same frequency may be interference-free in other parts of the net.=
    >> =A0 =A0 =A0 The dynamic allocation I propose was only an example. = If you
    >> have 16 frequencies and 2 of them have interference, and the chann= el
    >> offset is sequential, you may loose 2 packets every 16. Am I right= on
    >> this?
    >>
    >> Thoughts?
    >>
    >> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Diego
    >>
    >>
    >> 2013/9/13 Qin Wang <qinwang@berkeley.edu>:
    >> > Thomas,
    >> >
    >> > I agree with you that it is not clear what is the advantage a= nd
    >> > disadvantage of adaptive channel hopping in reality.
    >> >
    >> > In mind, based on the per-frequency report, PCE can do two th= ings:
    >> > (1) update channel hopping sequence is a frequency is really = bad
    >> > network wide;
    >> > (2) avoid use some bad channel when it runs cell allocation a= lgorithm.
    >> > The
    >> > two things happen in PCE, so, will not make negative impact o= n the
    >> > network.
    >> > Thought?
    >> >
    >> > Thanks
    >> >
    >> > Qin
    >> >
    >> >
    >> >
    >> >
    >> > On Fri, Sep 13, 2013 at 10:46 PM, Thomas Watteyne
    >> > <watteyne@eecs.berkeley.edu> wrote:
    >> >>
    >> >> Qin, Diego,
    >> >>
    >> >> My 2 cents. I agree with you that it would be nice for th= e PCE to
    >> >> be able to get some per-channel information. Although ada= ptive
    >> >> channel hopping (i.e.
    >> >> selectively blacklisting frequencies for a specific bundl= e) is
    >> >> appealing in principle, it's unclear (at least to me)= whether the
    >> >> gains clearly outweigh the overhead (complexity, signalig= n
    >> >> traffic) one has to pay to coordinate this [1-5].
    >> >>
    >> >> My opinion is that we should enable both metrics averages= over all
    >> >> channels, and per-channel metrics. In some configurations= , one can
    >> >> imagine gathering the former by default, and querying for= the
    >> >> latter on specific occasions. Having the option of gather= ing
    >> >> per-channel information does enable us to be future-proof= against
    >> >> future adaptive channel hopping algorithm.
    >> >>
    >> >> For sure, this makes for a great question: how do a pair = of motes
    >> >> and the PCE have to communicate to enable adaptive channe= l hopping
    >> >> on that link? The answer to that might directly impact th= e
    >> >> application payload formats we have are talking about. Is= this
    >> >> something you be interested in looking further into?
    >> >>
    >> >> Thomas
    >> >>
    >> >> [1] A Decentralized Scheduling Algorithm for Time Synchro= nized
    >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pist= er, Alexandre M.
    >> >> Bayen.
    >> >> ICST Transactions on Mobile Communications and Applicatio= ns, 11(7-9).
    >> >> European Union Digital Library link.
    >> >> doi:10.4108/icst.trans.mca.2011.e5.
    >> >> September 2011.
    >> >> [2] A Decentralized Scheduling Algorithm for Time Synchro= nized
    >> >> Channel Hopping. Andrew Tinka, Thomas Watteyne, Kris Pist= er.
    >> >> International Conference on Ad Hoc Networks (ADHOCNETS), = Victoria,
    >> >> BC, Canada, 18-20 August 2010.
    >> >> [3] Mitigating Multipath Fading Through Channel Hopping i= n
    >> >> Wireless Sensor Networks. Thomas Watteyne, Steven Lanzise= ra, Ankur
    >> >> Mehta, Kris Pister.
    >> >> IEEE
    >> >> International Conference on Communications (ICC), Cape To= wn, South
    >> >> Africa,
    >> >> 23-27 May, 2010.
    >> >> [4] Feasibility Analysis of Controller Design for Adaptiv= e Channel
    >> >> Hopping. Branko Kerkez, Thomas Watteyne, Mario Magliocco,= Steven
    >> >> Glaser, Kris Pister. First International Workshop on Perf= ormance
    >> >> Methodologies and Tools for Wireless Sensor Networks (WSN= Perf),
    >> >> Pisa, Italy, 23 October 2009.
    >> >> [5] Reliability Through Frequency Diversity: Why Channel = Hopping
    >> >> Makes Sense. Thomas Watteyne, Ankur Mehta, Kris Pister. S= ixth ACM
    >> >> International Symposium on Performance Evaluation of Wire= less Ad
    >> >> Hoc, Sensor, and Ubiquitous Networks (PE-WASUN), Tenerife= , Canary
    >> >> Islands, Spain, 26-30 October 2009.
    >> >>
    >> >> On Fri, Sep 13, 2013 at 7:23 AM, Prof. Diego Dujovne
    >> >> <diego.dujovne@mail.udp.cl> wrote:
    >> >>>
    >> >>> Hello Qin,
    >> >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 I think that a per-freque= ncy report will help the
    >> >>> PCE to decide which frequency to use, and maybe tempo= rarily
    >> >>> black-list them. For example, a dynamic scheme may in= clude
    >> >>> sampling the blacklisted frequencies every X minutes = to re-enable
    >> >>> them once the interference has disappeared.
    >> >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0This will require the node= to refresh the RSSI and
    >> >>> LQI values in a opportunistic way (every time the a c= ell uses
    >> >>> that frequency) to save energy.
    >> >>>
    >> >>> Any thoughts?
    >> >>>
    >> >>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 Diego
    >> >>
    >> >>
    >> >> _______________________________________________
    >> >> 6tsch mailing list
    >> >> 6tsch= @ietf.org
    >> >> https://www.ietf.org/mailman/listinfo/6tsch
    >> >>
    >> >
    >> >
    >> > _______________________________________________
    >> > 6tsch mailing list
    >> > 6tsch@iet= f.org
    >> > https://www.ietf.org/mailman/listinfo/6tsch
    >> >
    >>
    >>
    >>
    >> --
    >> DIEGO DUJOVNE
    >> Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunic= aciones
    >> Facultad de Ingenier=EDa UDP www.ingenieria.udp.cl
    >> (56 2) 676 8125
    >
    >



    --
    DIEGO DUJOVNE
    Acad=E9mico Escuela de Ingenier=EDa en Inform=E1tica y Telecomunicaciones Facultad de Ingenier=EDa UDP
    www.ingenieria.u= dp.cl
    (56 2) 676 8125
    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch



    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
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    --089e0163547c8933d104e69f3afb-- From pthubert@cisco.com Tue Sep 17 22:27:39 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0C78C11E810F for <6tsch@ietfa.amsl.com>; Tue, 17 Sep 2013 22:27:39 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -8.873 X-Spam-Level: X-Spam-Status: No, score=-8.873 tagged_above=-999 required=5 tests=[AWL=-0.575, BAYES_00=-2.599, HTML_MESSAGE=0.001, MANGLED_TRNFER=2.3, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ABKV4oP2QrrR for <6tsch@ietfa.amsl.com>; Tue, 17 Sep 2013 22:27:34 -0700 (PDT) Received: from rcdn-iport-6.cisco.com (rcdn-iport-6.cisco.com [173.37.86.77]) by ietfa.amsl.com (Postfix) with ESMTP id 281FA11E80FD for <6tsch@ietf.org>; Tue, 17 Sep 2013 22:27:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=8982; q=dns/txt; s=iport; t=1379482054; x=1380691654; h=from:to:subject:date:message-id:references:in-reply-to: mime-version; bh=frDVZNVawNZsApoSAYrVoilIHu9ku1v3Lp2033SjuHo=; b=ekaj5gfB3I7s+JEN7o1wzA2kN1B0V+h/IFbAKWQEP1K/k+Hgjt18LX49 eyb7Gs5iw/aC0bD+L+FFTDAep+6Jfrrb5/KAhybJagAPXkPGv3Pwsgpn7 ALG4NSdy3nRLVd1QA4Duoq35efFxeuP/KrZ+vw6Uu3/XWtCNtzi5VR8fZ s=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AuMGAPg4OVKtJV2d/2dsb2JhbABAGoMHOLk/iEqBGBZtB4ImAQEEAQEBCUI7AgEcEBsHJwoBFAcKAgQTCQsHAgSHYgw2uWyOLYEYERcBgx6BAAOJAI57gS+LDIU5gySBcQ X-IronPort-AV: E=Sophos;i="4.90,928,1371081600"; d="scan'208,217";a="261220802" Received: from rcdn-core-6.cisco.com ([173.37.93.157]) by rcdn-iport-6.cisco.com with ESMTP; 18 Sep 2013 05:27:33 +0000 Received: from xhc-aln-x12.cisco.com (xhc-aln-x12.cisco.com [173.36.12.86]) by rcdn-core-6.cisco.com (8.14.5/8.14.5) with ESMTP id r8I5RXSV029603 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for <6tsch@ietf.org>; Wed, 18 Sep 2013 05:27:33 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-aln-x12.cisco.com ([173.36.12.86]) with mapi id 14.02.0318.004; Wed, 18 Sep 2013 00:27:33 -0500 From: "Pascal Thubert (pthubert)" To: "6tsch@ietf.org" <6tsch@ietf.org> Thread-Topic: RFC 7025 on Requirements for GMPLS Applications of PCE Thread-Index: AQHOtBVWIXKUbbcKp0SdyHbZBo3MM5nK92Lo Date: Wed, 18 Sep 2013 05:27:32 +0000 Message-ID: References: <20130918021110.69A4AB1E011@rfc-editor.org> In-Reply-To: <20130918021110.69A4AB1E011@rfc-editor.org> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: multipart/alternative; boundary="_000_E3A80AE678154627AEEDAACE3FE35FC3ciscocom_" MIME-Version: 1.0 Subject: [6tsch] Fwd: RFC 7025 on Requirements for GMPLS Applications of PCE X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Sep 2013 05:27:39 -0000 --_000_E3A80AE678154627AEEDAACE3FE35FC3ciscocom_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable FYI Pascal D=E9but du message transf=E9r=E9 : Exp=E9diteur: > Date: 18 septembre 2013 04:11:10 UTC+02:00 Destinataire: >, > Cc: >, >, > Objet: RFC 7025 on Requirements for GMPLS Applications of PCE R=E9pondre =E0: > A new Request for Comments is now available in online RFC libraries. RFC 7025 Title: Requirements for GMPLS Applications of PCE Author: T. Otani, K. Ogaki, D. Caviglia, F. Zhang, C. Margaria Status: Informational Stream: IETF Date: September 2013 Mailbox: tm-otani@kddi.com, ke-oogaki@kddi.com, diego.caviglia@ericsson.com, zhangfatai@huawei.com, cyril.margaria@coriant.com Pages: 12 Characters: 26498 Updates/Obsoletes/SeeAlso: None I-D Tag: draft-ietf-pce-gmpls-aps-req-09.txt URL: http://www.rfc-editor.org/rfc/rfc7025.txt The initial effort of the PCE (Path Computation Element) WG focused mainly on MPLS. As a next step, this document describes functional requirements for GMPLS applications of PCE. This document is a product of the Path Computation Element Working Group of= the IETF. INFORMATIONAL: This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. This announcement is sent to the IETF-Announce and rfc-dist lists. To subscribe or unsubscribe, see http://www.ietf.org/mailman/listinfo/ietf-announce http://mailman.rfc-editor.org/mailman/listinfo/rfc-dist For searching the RFC series, see http://www.rfc-editor.org/search/rfc_sear= ch.php For downloading RFCs, see http://www.rfc-editor.org/rfc.html Requests for special distribution should be addressed to either the author of the RFC in question, or to rfc-editor@rfc-editor.org. Unless specifically noted otherwise on the RFC itself, all RFCs are for unlimited distribution. The RFC Editor Team Association Management Solutions, LLC --_000_E3A80AE678154627AEEDAACE3FE35FC3ciscocom_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
    FYI

    Pascal

    D=E9but du message transf=E9r=E9 :

    Exp=E9diteur: <= rfc-editor@rfc-editor.org>
    Date: 18 septembre 2013 04:11:10 UTC+02:00
    Destinataire: <ietf-ann= ounce@ietf.org>, <rfc-= dist@rfc-editor.org>
    Cc: <drafts-update-= ref@iana.org>, <pce@ietf.org&= gt;, <rfc-editor@rfc-editor= .org>
    Objet: RFC 7025 on Requirements for GMPLS Applications of PCE=
    R=E9pondre =E0: <ietf@ietf.org>

    A new Request for Comments is now available in online RFC librar= ies.


           RFC 7025

           Title:    &n= bsp; Requirements for GMPLS Applications of PCE
           Author:    &= nbsp;T. Otani, K. Ogaki,
               &nb= sp;       D. Caviglia, F. Zhang,<= br>            &nb= sp;       C. Margaria
           Status:    &= nbsp;Informational
           Stream:    &= nbsp;IETF
           Date:    &nb= sp;  September 2013
           Mailbox:    =     tm-otani@kddi.com,
               &nb= sp;       ke-oogaki@kddi.com,
               &nb= sp;       diego.caviglia@ericsson.com,
               &nb= sp;       zhangfatai@huawei.com,
               &nb= sp;       cyril.margaria@coriant.com
           Pages:    &n= bsp; 12
           Characters: 26498        Updates/Obsoletes/SeeAlso: =   None

           I-D Tag:    = draft-ietf-pce-gmpls-aps-req-09.txt

           URL:    &nbs= p;   h= ttp://www.rfc-editor.org/rfc/rfc7025.txt

    The initial effort of the PCE (Path Computation Element) WG focused
    mainly on MPLS.  As a next step, this document describes functio= nal
    requirements for GMPLS applications of PCE.

    This document is a product of the Path Computation Element Working Gr= oup of the IETF.


    INFORMATIONAL: This memo provides information for the Internet commun= ity.
    It does not specify an Internet standard of any kind. Distribution of=
    this memo is unlimited.

    This announcement is sent to the IETF-Announce and rfc-dist lists.
    To subscribe or unsubscribe, see
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    For searching the RFC series, see http://www.rfc-editor.org/search/rfc_search.php
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    Requests for special distribution should be addressed to either the
    author of the RFC in question, or to rfc-editor@rfc-editor.org.  Unless
    specifically noted otherwise on the RFC itself, all RFCs are for
    unlimited distribution.


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    --_000_E3A80AE678154627AEEDAACE3FE35FC3ciscocom_-- From xvilajosana@berkeley.edu Wed Sep 18 07:41:08 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A1E7E11E8121 for <6tsch@ietfa.amsl.com>; Wed, 18 Sep 2013 07:41:08 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.709 X-Spam-Level: X-Spam-Status: No, score=-1.709 tagged_above=-999 required=5 tests=[AWL=0.267, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id gYJSryKMHbH8 for <6tsch@ietfa.amsl.com>; Wed, 18 Sep 2013 07:41:04 -0700 (PDT) Received: from mail-pd0-f178.google.com (mail-pd0-f178.google.com [209.85.192.178]) by ietfa.amsl.com (Postfix) with ESMTP id BDE1311E80EF for <6tsch@ietf.org>; Wed, 18 Sep 2013 07:41:04 -0700 (PDT) Received: by mail-pd0-f178.google.com with SMTP id w10so7179413pde.9 for <6tsch@ietf.org>; Wed, 18 Sep 2013 07:41:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=hdeJfzdw5IJ/SUaojUTtIiw1rELyvTotDUTpft4V8rc=; b=Ji8Y4WkfD0LpIylfnmZari32zeTSJL84kPuc9nZPDgE+nOdnQpADqfMTbzHwNaA2Dl z2dWU/3k/516KRO0FULzJgx0jtZrSTkGQqvvA6czpdqLC5Ngyi2Gat8LchjkYi/m9/CN zL1yFSbo8Cxrjm4k4lTeQuCswxXHiSNwP0KiOMBCWx/pEE6upHp5b9awXRo4vT22zt67 FvM3A0pUSNu4lttApifBtMGKMsHqAdD0jO0G+N3Rw5xpFUIFn6dlRSpPiRf/tLlFtdYf xMuJJWy7bff7CAIms29JlW4L0BR1c8rrjgaHotbIP8OtP1Jtfa/afkyzs3cpUQnV/gVh QAPA== X-Gm-Message-State: ALoCoQlOv4LNS5pLQzb46ad8xaVIFG75odSc6YF+cWWLxBMaenSUDd4CLylUpIiO5Koi5Pn0HuUy MIME-Version: 1.0 X-Received: by 10.68.252.165 with SMTP id zt5mr18741844pbc.118.1379515263591; Wed, 18 Sep 2013 07:41:03 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Wed, 18 Sep 2013 07:41:03 -0700 (PDT) In-Reply-To: References: <0657BDCA-2F2A-4D30-B6C8-86132595BEAE@linear.com> Date: Wed, 18 Sep 2013 07:41:03 -0700 Message-ID: From: Xavier Vilajosana Guillen To: Thomas Watteyne Content-Type: multipart/alternative; boundary=047d7b1638273fb6fa04e6a96d7f Cc: 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] Fwd: 6TiSCH: about join priority in IEEE802.15.4e X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Sep 2013 14:41:08 -0000 --047d7b1638273fb6fa04e6a96d7f Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Thomas, when you say the "the "integer" portion of the rank in the join priority," you mean the result of the DAGRank(rank) function? Cheers Xavi On Tue, Sep 17, 2013 at 6:59 PM, Thomas Watteyne wrote: > All, > > Please find below an e-mail exchange I had with Jonathan Simon, co-editor > of the IEEE802.15.4e standard. He is confirming that driving the join > priority field in the enhanced beacons from an upper layer does not break > standards-compliance, which is great news. > > His second point is also very interesting: we could use just the "integer= " > portion of the rank in the join priority, so that the value announced is > roughly equivalent to a hop count. > > Would that work? > > Thomas > > ---------- Forwarded message ---------- > From: Jonathan Simon > Date: Tue, Sep 17, 2013 at 10:14 AM > Subject: Re: 6TiSCH: about join priority in IEEE802.15.4e > To: Thomas Watteyne > > > Thomas - The join priority was intended to be used in the way you > describe. Note that join priority is described somewhat vaguely in the > text - the spec does not say what to use it for other beyond a MAC > management layer function of selecting a prospective parent, and no servi= ce > primitives are described to set or change it. The spec does not use the > proscriptive "shall" or "must" language, and I certainly intended it as a > default in absence of other upper layer methods to manage it. > > So as to 1), updating the join priority to reflect a node's actual > position in the network rather than its "birth" position is a good idea. > WirelessHART has this capability. > For 2), the important thing is that all devices in the network should be > using join priority in the same way to avoid confusion. Making the > objective function scale in integer hops seems intuitive and simple and > matches the default description, but if each device was n "hops" from its > parent, it would serve the same purpose. > > Hope this answers your questions. Feel free to forward this to the 6TiSCH > group. > > Jonathan > -- > Jonathan Simon, Ph. D > Director of Systems Engineering > Linear Technology, Dust Networks product group > 30695 Huntwood Ave > Hayward, CA 94544-7021 > (510) 400-2936 > (510) 489-3799 FAX > jsimon@linear.com > > **LINEAR TECHNOLOGY CORPORATION** > *****Internet Email Confidentiality Notice***** > This e-mail transmission, and any documents, files or previous > e-mail messages attached to it may contain confidential information that > is legally privileged. If you are not the intended recipient, or a > person responsible for delivering it to the intended recipient, you are > hereby notified that any disclosure, copying, distribution or use of any = of > the information contained in or attached to this transmission is > STRICTLY PROHIBITED. If you have received this transmission in error, > please immediately notify me by reply e-mail, or by telephone at (510) > 400-2936, and destroy the original transmission and its > attachments without reading or saving in any manner. Thank you. > > On Sep 12, 2013, at 12:53 PM, Thomas Watteyne wrote: > > Jonathan, > > We are discussing the interaction between IEEE802.15.4e and the RPL > routing protocol in the 6TiSCH group (see minutes last call at [1]). > > We have some questions about the "Join Priority" field in the > IEEE802.15.4e EB, in particular about how much an upper layer (6top [2]) > can influence its value. We want to make sure that we do not break > compliance with the IEEE802.15.4e standard. > > For reference, this is the text in IEEE802.15.4e (p.90): > > The 1-octet Join Priority field can be used by a joining device to select > among beaconing devices when multiple beacons are heard. The PAN > coordinator=92s join priority is zero. A lower value of join priority > indicates that the device is the preferred one to connect to. The beaconi= ng > device=92s join priority is the lowest join priority heard when it joined > the network plus one. > > We have the following discussions: > > 1. After a node has joined, it might be moving to a different > topological location. In that case, it should update the Join Priority= it > is announcing. Luckily, RPL maintains the node's rank, a concept very > similar to join priority. > *Question*: Can we have the 6top change the priority announced by > IEEE802.15.4e to the RPL rank (or a number calculated from the RPL ran= k) > after the node has joined? > 2. RPL is very flexible about how rank is calculated. Depending on the > Objective Function used, the rank can be calculated differently. In > particular, the difference of the rank between a node and routing pare= nt > can be different from 1. > *Question*: Can the join priority announced by node and its parent be > different by more than 1? > > Your input is very welcome, > > Thomas > > [1] https://bitbucket.org/6tsch/meetings/wiki/130906_webex > [2] http://tools.ietf.org/html/draft-wang-6tsch-6top-00 > > > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --047d7b1638273fb6fa04e6a96d7f Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
    Hi Thomas,

    when you say the "the "in= teger" portion of the rank in the join priority," you mean the re= sult of the DAGRank(rank) function?

    Cheers
    Xavi


    On Tue, Sep 17, 2013 at 6:59 PM, Thomas = Watteyne <watteyne@eecs.berkeley.edu> wrote:
    All,

    Please find below an e-mail exchan= ge I had with Jonathan Simon, co-editor of the IEEE802.15.4e standard. He i= s confirming that driving the join priority field in the enhanced beacons f= rom an upper layer does not break standards-compliance, which is great news= .

    His second point is also very interesting: we could use= just the "integer" portion of the rank in the join priority, so = that the value announced is roughly equivalent to a hop count.

    Would that work?

    Thomas

    ---------- Forwarded message ----------
    From: Jonathan Simon <jsimon@linear.com>
    Date: Tue, Sep 17, 2013 at 10:14 AM
    Subject: Re: 6TiSCH: about join prio= rity in IEEE802.15.4e
    To: Thomas Watteyne <watteyne@eecs.berkeley.edu>

    Thomas - =A0The join priority was intended to be used in the way you descri= be. =A0Note that join priority is described somewhat vaguely in the text -= =A0the spec does not say what to use it for other beyond a MAC management l= ayer function of selecting a prospective parent, and no service primitives = are described to set or change it. =A0 The spec=A0does not use the proscrip= tive "shall" or "must" language, and I certainly intend= ed it as a default in absence of other upper layer methods to manage it. = =A0

    So as to 1), updating the join priority to reflect a node= 9;s actual position in the network rather than its "birth" positi= on is a good idea. =A0WirelessHART has this capability.
    For 2), = =A0the important thing is that all devices in the network should be using j= oin priority in the same way to avoid confusion. Making the objective funct= ion scale in integer hops seems intuitive and simple and matches the defaul= t description, but if each device was n "hops" from its parent, i= t would serve the same purpose.

    Hope this answers your questions. Feel free to for= ward this to the 6TiSCH group.

    Jonathan
    --=A0
    Jonathan Simon, Ph. D
    Director of Systems Engineering
    Linear= Technology, Dust Networks product group
    30695 Huntwood Ave
    Hayward, = CA 94544-7021
    (510) 400-2936
    (510) 489-3799 FAX
    jsimon@linear.com

    **LINEAR TECHNOLOGY=A0CORPORATION**= =A0
    *****Internet Email Confidentiality=A0Notice*****=A0
    =A0This e-mail transmission, and any=A0documents, files or previous e-mail= =A0messages attached to it may contain=A0confidential information that is= =A0legally privileged. If you are not the=A0intended recipient, or a person= =A0responsible for delivering it to the=A0intended recipient, you are hereb= y=A0notified that any disclosure, copying,=A0distribution or use of any of = the=A0information contained in or attached=A0to this transmission is STRICT= LY=A0PROHIBITED. If you have received this=A0transmission in error, please= =A0immediately notify me by reply e-mail, or by telephone at (510) 400-2= 936, and destroy the original=A0transmission and its attachments=A0with= out reading or saving in any=A0manner. Thank you.=A0

    On Sep 12, 2013, at 12:53 PM, Thomas Watteyne wrote:
    Jonathan,

    We= are discussing the interaction between IEEE802.15.4e and the RPL routing p= rotocol in the 6TiSCH group (see minutes last call at [1]).

    We have some questions about the "Join Priority&qu= ot; field in the IEEE802.15.4e EB, in particular about how much an upper la= yer (6top [2]) can influence its value. We want to make sure that we do not= break compliance with the IEEE802.15.4e standard.

    For reference, this is the text in IEEE802.15.4e (p.90)= :

    The 1-octet Join Priority field can be used by a joining d= evice to select among beaco= ning devices when multiple beacons are heard. The PAN coordinator=92s join priority is zero. A lower value of join priority indicates that the device is the prefer= red one to connect to. The beaconing device=92s join priority is the lowest join priority heard when i= t joined the network plus one.

    We have the following discussions:
    1. After a node has joined, it might be moving to a different topolog= ical location. In that case, it should update the Join Priority it is annou= ncing. Luckily, RPL maintains the node's rank, a concept very similar t= o join priority.
      Question: Can we have the 6top change the priority announced = by IEEE802.15.4e to the RPL rank (or a number calculated from the RPL rank)= after the node has joined?
    2. RPL is very flexible about how rank is = calculated. Depending on the Objective Function used, the rank can be calcu= lated differently. In particular, the difference of the rank between a node= and routing parent can be different from 1.
      Question: Can the join priority announced by node and its par= ent be different by more than 1?
    Your input is very welco= me,

    Thomas




    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch


    --047d7b1638273fb6fa04e6a96d7f-- From pthubert@cisco.com Wed Sep 18 08:16:17 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8762911E81AD for <6tsch@ietfa.amsl.com>; Wed, 18 Sep 2013 08:16:17 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.598 X-Spam-Level: X-Spam-Status: No, score=-10.598 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5g5fLWiFX7mE for <6tsch@ietfa.amsl.com>; Wed, 18 Sep 2013 08:16:12 -0700 (PDT) Received: from rcdn-iport-1.cisco.com (rcdn-iport-1.cisco.com [173.37.86.72]) by ietfa.amsl.com (Postfix) with ESMTP id 8918D11E8221 for <6tsch@ietf.org>; Wed, 18 Sep 2013 08:16:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=21995; q=dns/txt; s=iport; t=1379517372; x=1380726972; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=FOobc3D4C2dItymbHn4sAlsu5POCfccFRH3c2EaVe6s=; b=JgGszaOm0oZOSOG1knPbeXR+vKerwd4ePxiIXssAqofkcUuSADfwUsdi PBe+Fc9i+QGbu1tTIInS8lxcnGGizar0DLNbwt1Nfu54sgUONH9Xmxc/E v4sw3Yvpe6hwX6Qj/Sy2e/5Sa/uqmW3NV4721IvVYbsLW2+twlIBqX+T6 c=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AsgGAEfDOVKtJV2b/2dsb2JhbABOCQMOgjVEOFK4YogOOIEbFnSCJQEBAQQBAQEaEEELEAIBCBEBAgEBAQsdBycLFAMGCAIEAQ0FCBKHaQy6S44ZAQQQgQggAQsBBAYBBguDDYEAA4VOk1yQRYJlP4FxOQ X-IronPort-AV: E=Sophos;i="4.90,929,1371081600"; d="scan'208,217";a="261226748" Received: from rcdn-core-4.cisco.com ([173.37.93.155]) by rcdn-iport-1.cisco.com with ESMTP; 18 Sep 2013 15:16:11 +0000 Received: from xhc-rcd-x06.cisco.com (xhc-rcd-x06.cisco.com [173.37.183.80]) by rcdn-core-4.cisco.com (8.14.5/8.14.5) with ESMTP id r8IFGB7t010902 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Wed, 18 Sep 2013 15:16:11 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-rcd-x06.cisco.com ([173.37.183.80]) with mapi id 14.02.0318.004; Wed, 18 Sep 2013 10:16:11 -0500 From: "Pascal Thubert (pthubert)" To: "xvilajosana@eecs.berkeley.edu" , "Thomas Watteyne" Thread-Topic: [6tsch] Fwd: 6TiSCH: about join priority in IEEE802.15.4e Thread-Index: AQHOtH0jOOewzfMeZEiCLzRZdxKx75nLmQdA Date: Wed, 18 Sep 2013 15:16:10 +0000 Deferred-Delivery: Wed, 18 Sep 2013 15:15:00 +0000 Message-ID: References: <0657BDCA-2F2A-4D30-B6C8-86132595BEAE@linear.com> In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.61.100.213] Content-Type: multipart/alternative; boundary="_000_E045AECD98228444A58C61C200AE1BD84147C9EAxmbrcdx01ciscoc_" MIME-Version: 1.0 Cc: 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] Fwd: 6TiSCH: about join priority in IEEE802.15.4e X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Sep 2013 15:16:17 -0000 --_000_E045AECD98228444A58C61C200AE1BD84147C9EAxmbrcdx01ciscoc_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hello Xavi I hope so. As you point out, it is the intention of the DAGRank() is to obt= ain an octet that is monotonically incrementing with the depth. So I agree it is a perfect match for the join priority and that is what I = documented in the latest architecture in the repo based on the last 2 calls= . https://bitbucket.org/6tsch/draft-thubert-6tsch-architecture/src/faeea55341= 3ba1f5be89cf7d9edb549b837ebe27/draft-thubert-6tsch-architecture-03.txt?at= =3Dmaster#cl-667 I'd appreciate you have a look to review my text there : ) cheers, Pascal From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of X= avier Vilajosana Guillen Sent: mercredi 18 septembre 2013 16:41 To: Thomas Watteyne Cc: 6TSCH Subject: Re: [6tsch] Fwd: 6TiSCH: about join priority in IEEE802.15.4e Hi Thomas, when you say the "the "integer" portion of the rank in the join priority," = you mean the result of the DAGRank(rank) function? Cheers Xavi On Tue, Sep 17, 2013 at 6:59 PM, Thomas Watteyne > wrote: All, Please find below an e-mail exchange I had with Jonathan Simon, co-editor o= f the IEEE802.15.4e standard. He is confirming that driving the join priori= ty field in the enhanced beacons from an upper layer does not break standar= ds-compliance, which is great news. His second point is also very interesting: we could use just the "integer" = portion of the rank in the join priority, so that the value announced is ro= ughly equivalent to a hop count. Would that work? Thomas ---------- Forwarded message ---------- From: Jonathan Simon > Date: Tue, Sep 17, 2013 at 10:14 AM Subject: Re: 6TiSCH: about join priority in IEEE802.15.4e To: Thomas Watteyne > Thomas - The join priority was intended to be used in the way you describe= . Note that join priority is described somewhat vaguely in the text - the = spec does not say what to use it for other beyond a MAC management layer fu= nction of selecting a prospective parent, and no service primitives are des= cribed to set or change it. The spec does not use the proscriptive "shall= " or "must" language, and I certainly intended it as a default in absence o= f other upper layer methods to manage it. So as to 1), updating the join priority to reflect a node's actual position= in the network rather than its "birth" position is a good idea. WirelessH= ART has this capability. For 2), the important thing is that all devices in the network should be u= sing join priority in the same way to avoid confusion. Making the objective= function scale in integer hops seems intuitive and simple and matches the = default description, but if each device was n "hops" from its parent, it wo= uld serve the same purpose. Hope this answers your questions. Feel free to forward this to the 6TiSCH g= roup. Jonathan -- Jonathan Simon, Ph. D Director of Systems Engineering Linear Technology, Dust Networks product group 30695 Huntwood Ave Hayward, CA 94544-7021 (510) 400-2936 (510) 489-3799 FAX jsimon@linear.com **LINEAR TECHNOLOGY CORPORATION** *****Internet Email Confidentiality Notice***** This e-mail transmission, and any documents, files or previous e-mail mess= ages attached to it may contain confidential information that is legally pr= ivileged. If you are not the intended recipient, or a person responsible fo= r delivering it to the intended recipient, you are hereby notified that any= disclosure, copying, distribution or use of any of the information contain= ed in or attached to this transmission is STRICTLY PROHIBITED. If you have = received this transmission in error, please immediately notify me by reply = e-mail, or by telephone at (510) 400-2936, and de= stroy the original transmission and its attachments without reading or savi= ng in any manner. Thank you. On Sep 12, 2013, at 12:53 PM, Thomas Watteyne wrote: Jonathan, We are discussing the interaction between IEEE802.15.4e and the RPL routing= protocol in the 6TiSCH group (see minutes last call at [1]). We have some questions about the "Join Priority" field in the IEEE802.15.4e= EB, in particular about how much an upper layer (6top [2]) can influence i= ts value. We want to make sure that we do not break compliance with the IEE= E802.15.4e standard. For reference, this is the text in IEEE802.15.4e (p.90): The 1-octet Join Priority field can be used by a joining device to select a= mong beaconing devices when multiple beacons are heard. The PAN coordinator= 's join priority is zero. A lower value of join priority indicates that the= device is the preferred one to connect to. The beaconing device's join pri= ority is the lowest join priority heard when it joined the network plus one= . We have the following discussions: 1. After a node has joined, it might be moving to a different topologica= l location. In that case, it should update the Join Priority it is announci= ng. Luckily, RPL maintains the node's rank, a concept very similar to join = priority. Question: Can we have the 6top change the priority announced by IEEE802.15.= 4e to the RPL rank (or a number calculated from the RPL rank) after the nod= e has joined? 2. RPL is very flexible about how rank is calculated. Depending on the O= bjective Function used, the rank can be calculated differently. In particul= ar, the difference of the rank between a node and routing parent can be dif= ferent from 1. Question: Can the join priority announced by node and its parent be differe= nt by more than 1? Your input is very welcome, Thomas [1] https://bitbucket.org/6tsch/meetings/wiki/130906_webex [2] http://tools.ietf.org/html/draft-wang-6tsch-6top-00 _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_E045AECD98228444A58C61C200AE1BD84147C9EAxmbrcdx01ciscoc_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

    Hello Xavi

     <= /p>

    I hope so. As you point o= ut, it is the intention of the DAGRank() is to obtain an octet that is mono= tonically incrementing with the depth.

    So I agree it is a perfec= t match for the join priority and that is  what I documented in the la= test architecture in the repo based on the last 2 calls.<= /p>

     <= /p>

    https://bitb= ucket.org/6tsch/draft-thubert-6tsch-architecture/src/faeea553413ba1f5be89cf= 7d9edb549b837ebe27/draft-thubert-6tsch-architecture-03.txt?at=3Dmaster#cl-6= 67

     <= /p>

    I’d appreciate you = have a look to review my text there : )

     

    cheers,=

     <= /p>

    Pascal

     <= /p>

    From: 6tsch-bo= unces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
    Sent: mercredi 18 septembre 2013 16:41
    To: Thomas Watteyne
    Cc: 6TSCH
    Subject: Re: [6tsch] Fwd: 6TiSCH: about join priority in IEEE802.15.= 4e

     

    Hi Thomas,

    when you say the "the "integer" portion of the rank in the j= oin priority," you mean the result of the DAGRank(rank) function?=

    Cheers
    Xavi

     

    On Tue, Sep 17, 2013 at 6:59 PM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

    All,

     

    Please find below an e-mail exchange I had with Jona= than Simon, co-editor of the IEEE802.15.4e standard. He is confirming that = driving the join priority field in the enhanced beacons from an upper layer= does not break standards-compliance, which is great news.

     

    His second point is also very interesting: we could = use just the "integer" portion of the rank in the join priority, = so that the value announced is roughly equivalent to a hop count.

     

    Would that work?

     

    Thomas

    ---------- Forwarded = message ----------
    From: Jonathan Simon <jsimon@linear.com>
    Date: Tue, Sep 17, 2013 at 10:14 AM
    Subject: Re: 6TiSCH: about join priority in IEEE802.15.4e
    To: Thomas Watteyne <watteyne@eecs.berkeley.edu>

    Thomas -  The join priority was intended to be = used in the way you describe.  Note that join priority is described so= mewhat vaguely in the text - the spec does not say what to use it for = other beyond a MAC management layer function of selecting a prospective parent, and no service primitives are described to set or ch= ange it.   The spec does not use the proscriptive "shall&quo= t; or "must" language, and I certainly intended it as a default i= n absence of other upper layer methods to manage it.  

     

    So as to 1), updating the join priority to reflect a= node's actual position in the network rather than its "birth" po= sition is a good idea.  WirelessHART has this capability.

    For 2),  the important thing is that all device= s in the network should be using join priority in the same way to avoid con= fusion. Making the objective function scale in integer hops seems intuitive= and simple and matches the default description, but if each device was n "hops" from its parent, it would serve = the same purpose.

     

    Hope this answers your questions. Feel free to forwa= rd this to the 6TiSCH group.

     

    Jonathan

    -- 
    Jonathan Simon, Ph. D
    Director of Systems Engineering
    Linear Technology, Dust Networks product group
    30695 Huntwood Ave
    Hayward, CA 94544-7021
    (510) 400-2936 (510) 489-3799 F= AX
    jsimon@linear.com

    **LINEAR TECHNOLOGY CORPORATION** 
    *****Internet Email Confidentiality Notice***** 
     This e-mail transmission, and any documents, files or previous e= -mail messages attached to it may contain confidential informatio= n that is legally privileged. If you are not the intended recipie= nt, or a person responsible for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, = ;distribution or use of any of the information contained in or attache= d to this transmission is STRICTLY PROHIBITED. If you have receiv= ed this transmission in error, please immediately notify me by reply e-mail, or by telephone at     (510) 400-2936, and destroy the original transmission and its atta= chments without reading or saving in any manner. Thank you. =

     

    On Sep 12, 2013, at 12:53 PM, Thomas Watteyne wrote:=



    Jonathan,

     

    We are discussing the interaction between IEEE802.15= .4e and the RPL routing protocol in the 6TiSCH group (see minutes last call= at [1]).

     

    We have some questions about the "Join Priority= " field in the IEEE802.15.4e EB, in particular about how much an upper= layer (6top [2]) can influence its value. We want to make sure that we do = not break compliance with the IEEE802.15.4e standard.

     

    For reference, this is the text in IEEE802.15.4e (p.= 90):

     

    = The 1-octet Join Priority field can be used by a joining device to select among beaconing devices whe= n multiple beacons are heard. The PAN coordinator’s join priority is = zero. A lower value of join priority indicates that the device is th= e preferred one to connect to. The beaconing device’s join priority i= s the lowest join priority heard when it joined= the network plus one.

     

    We have the following discussions:

    1. After a node has joined, it might be moving to a different topological loca= tion. In that case, it should update the Join Priority it is announcing. Lu= ckily, RPL maintains the node's rank, a concept very similar to join priori= ty.
      Question: Can we have the 6top change the priority announced = by IEEE802.15.4e to the RPL rank (or a number calculated from the RPL rank)= after the node has joined?
    2. Your input is very welcome,

     

    Thomas

     

     

     


    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch

     

    --_000_E045AECD98228444A58C61C200AE1BD84147C9EAxmbrcdx01ciscoc_-- From pthubert@cisco.com Wed Sep 18 08:31:36 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9517A11E823E for <6tsch@ietfa.amsl.com>; Wed, 18 Sep 2013 08:31:36 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.598 X-Spam-Level: X-Spam-Status: No, score=-10.598 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 44NM3AVZ8nGz for <6tsch@ietfa.amsl.com>; Wed, 18 Sep 2013 08:31:31 -0700 (PDT) Received: from rcdn-iport-4.cisco.com (rcdn-iport-4.cisco.com [173.37.86.75]) by ietfa.amsl.com (Postfix) with ESMTP id 8BEC211E81AD for <6tsch@ietf.org>; Wed, 18 Sep 2013 08:31:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=26745; q=dns/txt; s=iport; t=1379518291; x=1380727891; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=xu6LSRg8ny2qp230nqxjZKS6Jc4slkoOIuMU3ZY5ilI=; b=gzZsVWjXLalsNg8KS9aA9MYmz/SkntCPWuXf1VjRA3Ft0C/ZcAQTakBa ljybQo2wwFgdVOVVZQr7uXgTYfnCkmbgxpKNWRlSu+tb12szlGFFLA20d QpOOl9JjSs0ANP6KjIwHCu2w2SPi1Fk+Eg9cOiWgy4LrM8M8zPDP3VHR7 g=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AsgGAKTGOVKtJXHB/2dsb2JhbABOCQMOgjVEOFK4YogOOIEbFnSCJQEBAQQBAQEaEEELEAIBCBEBAgEBAQsWBwcnCxQDBggCBAENBQgSh2kMuk+OGQEEEIEIIAELAQQGAQYLgw2BAAOFTpNckEWCZT+BcTk X-IronPort-AV: E=Sophos;i="4.90,929,1371081600"; d="scan'208,217";a="261510516" Received: from rcdn-core2-6.cisco.com ([173.37.113.193]) by rcdn-iport-4.cisco.com with ESMTP; 18 Sep 2013 15:31:30 +0000 Received: from xhc-rcd-x06.cisco.com (xhc-rcd-x06.cisco.com [173.37.183.80]) by rcdn-core2-6.cisco.com (8.14.5/8.14.5) with ESMTP id r8IFVUZ5020188 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Wed, 18 Sep 2013 15:31:30 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-rcd-x06.cisco.com ([173.37.183.80]) with mapi id 14.02.0318.004; Wed, 18 Sep 2013 10:31:29 -0500 From: "Pascal Thubert (pthubert)" To: "xvilajosana@eecs.berkeley.edu" , "Thomas Watteyne" Thread-Topic: [6tsch] Fwd: 6TiSCH: about join priority in IEEE802.15.4e Thread-Index: AQHOtH0jOOewzfMeZEiCLzRZdxKx75nLmQdAgAAF4LA= Date: Wed, 18 Sep 2013 15:31:28 +0000 Deferred-Delivery: Wed, 18 Sep 2013 15:31:00 +0000 Message-ID: References: <0657BDCA-2F2A-4D30-B6C8-86132595BEAE@linear.com> In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.61.100.213] Content-Type: multipart/alternative; boundary="_000_E045AECD98228444A58C61C200AE1BD84147CA8Bxmbrcdx01ciscoc_" MIME-Version: 1.0 Cc: 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] Fwd: 6TiSCH: about join priority in IEEE802.15.4e X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Sep 2013 15:31:36 -0000 --_000_E045AECD98228444A58C61C200AE1BD84147CA8Bxmbrcdx01ciscoc_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Less typos with this update actually: https://bitbucket.org/6tsch/draft-thubert-6tsch-architecture/src/cc01e4a608= 9eb66151b823783f9cf1df78bc4c75/draft-thubert-6tsch-architecture-03.txt?at= =3Dmaster#cl-667 cheers, Pascal From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of P= ascal Thubert (pthubert) Sent: mercredi 18 septembre 2013 17:16 To: xvilajosana@eecs.berkeley.edu; Thomas Watteyne Cc: 6TSCH Subject: Re: [6tsch] Fwd: 6TiSCH: about join priority in IEEE802.15.4e Hello Xavi I hope so. As you point out, it is the intention of the DAGRank() is to obt= ain an octet that is monotonically incrementing with the depth. So I agree it is a perfect match for the join priority and that is what I = documented in the latest architecture in the repo based on the last 2 calls= . https://bitbucket.org/6tsch/draft-thubert-6tsch-architecture/src/faeea55341= 3ba1f5be89cf7d9edb549b837ebe27/draft-thubert-6tsch-architecture-03.txt?at= =3Dmaster#cl-667 I'd appreciate you have a look to review my text there : ) cheers, Pascal From: 6tsch-bounces@ietf.org [mailto:6tsch-b= ounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen Sent: mercredi 18 septembre 2013 16:41 To: Thomas Watteyne Cc: 6TSCH Subject: Re: [6tsch] Fwd: 6TiSCH: about join priority in IEEE802.15.4e Hi Thomas, when you say the "the "integer" portion of the rank in the join priority," = you mean the result of the DAGRank(rank) function? Cheers Xavi On Tue, Sep 17, 2013 at 6:59 PM, Thomas Watteyne > wrote: All, Please find below an e-mail exchange I had with Jonathan Simon, co-editor o= f the IEEE802.15.4e standard. He is confirming that driving the join priori= ty field in the enhanced beacons from an upper layer does not break standar= ds-compliance, which is great news. His second point is also very interesting: we could use just the "integer" = portion of the rank in the join priority, so that the value announced is ro= ughly equivalent to a hop count. Would that work? Thomas ---------- Forwarded message ---------- From: Jonathan Simon > Date: Tue, Sep 17, 2013 at 10:14 AM Subject: Re: 6TiSCH: about join priority in IEEE802.15.4e To: Thomas Watteyne > Thomas - The join priority was intended to be used in the way you describe= . Note that join priority is described somewhat vaguely in the text - the = spec does not say what to use it for other beyond a MAC management layer fu= nction of selecting a prospective parent, and no service primitives are des= cribed to set or change it. The spec does not use the proscriptive "shall= " or "must" language, and I certainly intended it as a default in absence o= f other upper layer methods to manage it. So as to 1), updating the join priority to reflect a node's actual position= in the network rather than its "birth" position is a good idea. WirelessH= ART has this capability. For 2), the important thing is that all devices in the network should be u= sing join priority in the same way to avoid confusion. Making the objective= function scale in integer hops seems intuitive and simple and matches the = default description, but if each device was n "hops" from its parent, it wo= uld serve the same purpose. Hope this answers your questions. Feel free to forward this to the 6TiSCH g= roup. Jonathan -- Jonathan Simon, Ph. D Director of Systems Engineering Linear Technology, Dust Networks product group 30695 Huntwood Ave Hayward, CA 94544-7021 (510) 400-2936 (510) 489-3799 FAX jsimon@linear.com **LINEAR TECHNOLOGY CORPORATION** *****Internet Email Confidentiality Notice***** This e-mail transmission, and any documents, files or previous e-mail mess= ages attached to it may contain confidential information that is legally pr= ivileged. If you are not the intended recipient, or a person responsible fo= r delivering it to the intended recipient, you are hereby notified that any= disclosure, copying, distribution or use of any of the information contain= ed in or attached to this transmission is STRICTLY PROHIBITED. If you have = received this transmission in error, please immediately notify me by reply = e-mail, or by telephone at (510) 400-2936, and de= stroy the original transmission and its attachments without reading or savi= ng in any manner. Thank you. On Sep 12, 2013, at 12:53 PM, Thomas Watteyne wrote: Jonathan, We are discussing the interaction between IEEE802.15.4e and the RPL routing= protocol in the 6TiSCH group (see minutes last call at [1]). We have some questions about the "Join Priority" field in the IEEE802.15.4e= EB, in particular about how much an upper layer (6top [2]) can influence i= ts value. We want to make sure that we do not break compliance with the IEE= E802.15.4e standard. For reference, this is the text in IEEE802.15.4e (p.90): The 1-octet Join Priority field can be used by a joining device to select a= mong beaconing devices when multiple beacons are heard. The PAN coordinator= 's join priority is zero. A lower value of join priority indicates that the= device is the preferred one to connect to. The beaconing device's join pri= ority is the lowest join priority heard when it joined the network plus one= . We have the following discussions: 1. After a node has joined, it might be moving to a different topologica= l location. In that case, it should update the Join Priority it is announci= ng. Luckily, RPL maintains the node's rank, a concept very similar to join = priority. Question: Can we have the 6top change the priority announced by IEEE802.15.= 4e to the RPL rank (or a number calculated from the RPL rank) after the nod= e has joined? 2. RPL is very flexible about how rank is calculated. Depending on the O= bjective Function used, the rank can be calculated differently. In particul= ar, the difference of the rank between a node and routing parent can be dif= ferent from 1. Question: Can the join priority announced by node and its parent be differe= nt by more than 1? Your input is very welcome, Thomas [1] https://bitbucket.org/6tsch/meetings/wiki/130906_webex [2] http://tools.ietf.org/html/draft-wang-6tsch-6top-00 _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_E045AECD98228444A58C61C200AE1BD84147CA8Bxmbrcdx01ciscoc_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

    Less typos with this update actually:

    https://bitb= ucket.org/6tsch/draft-thubert-6tsch-architecture/src/cc01e4a6089eb66151b823= 783f9cf1df78bc4c75/draft-thubert-6tsch-architecture-03.txt?at=3Dmaster#cl-6= 67

    cheers,=

    Pascal

     <= /p>

    From: 6tsch-bo= unces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Pascal Thubert (pthubert)
    Sent: mercredi 18 septembre 2013 17:16
    To: xvilajosana@eecs.berkeley.edu; Thomas Watteyne
    Cc: 6TSCH
    Subject: Re: [6tsch] Fwd: 6TiSCH: about join priority in IEEE802.15.= 4e

     

    Hello Xavi

     <= /p>

    I hope so. As you point o= ut, it is the intention of the DAGRank() is to obtain an octet that is mono= tonically incrementing with the depth.

    So I agree it is a perfec= t match for the join priority and that is  what I documented in the la= test architecture in the repo based on the last 2 calls.<= /p>

     <= /p>

    https://bitb= ucket.org/6tsch/draft-thubert-6tsch-architecture/src/faeea553413ba1f5be89cf= 7d9edb549b837ebe27/draft-thubert-6tsch-architecture-03.txt?at=3Dmaster#cl-6= 67

     <= /p>

    I’d appreciate you = have a look to review my text there : )

     

    cheers,=

     <= /p>

    Pascal

     <= /p>

    From: 6tsch-bounces@ietf.org [mailto:6tsch-bounces@ietf.org] On Behalf Of Xavier Vilajosana Guillen
    Sent: mercredi 18 septembre 2013 16:41
    To: Thomas Watteyne
    Cc: 6TSCH
    Subject: Re: [6tsch] Fwd: 6TiSCH: about join priority in IEEE802.15.= 4e

     

    Hi Thomas,

    when you say the "the "integer" portion of the rank in the j= oin priority," you mean the result of the DAGRank(rank) function?=

    Cheers
    Xavi

     

    On Tue, Sep 17, 2013 at 6:59 PM, Thomas Watteyne <= ;watteyne@e= ecs.berkeley.edu> wrote:

    All,

     

    Please find below an e-mail exchange I had with Jona= than Simon, co-editor of the IEEE802.15.4e standard. He is confirming that = driving the join priority field in the enhanced beacons from an upper layer= does not break standards-compliance, which is great news.

     

    His second point is also very interesting: we could = use just the "integer" portion of the rank in the join priority, = so that the value announced is roughly equivalent to a hop count.

     

    Would that work?

     

    Thomas

    ---------- Forwarded = message ----------
    From: Jonathan Simon <jsimon@linear.com>
    Date: Tue, Sep 17, 2013 at 10:14 AM
    Subject: Re: 6TiSCH: about join priority in IEEE802.15.4e
    To: Thomas Watteyne <watteyne@eecs.berkeley.edu>

    Thomas -  The join priority was intended to be = used in the way you describe.  Note that join priority is described so= mewhat vaguely in the text - the spec does not say what to use it for = other beyond a MAC management layer function of selecting a prospective parent, and no service primitives are described to set or ch= ange it.   The spec does not use the proscriptive "shall&quo= t; or "must" language, and I certainly intended it as a default i= n absence of other upper layer methods to manage it.  

     

    So as to 1), updating the join priority to reflect a= node's actual position in the network rather than its "birth" po= sition is a good idea.  WirelessHART has this capability.

    For 2),  the important thing is that all device= s in the network should be using join priority in the same way to avoid con= fusion. Making the objective function scale in integer hops seems intuitive= and simple and matches the default description, but if each device was n "hops" from its parent, it would serve = the same purpose.

     

    Hope this answers your questions. Feel free to forwa= rd this to the 6TiSCH group.

     

    Jonathan

    -- 
    Jonathan Simon, Ph. D
    Director of Systems Engineering
    Linear Technology, Dust Networks product group
    30695 Huntwood Ave
    Hayward, CA 94544-7021
    (510) 400-2936 (510) 489-3799 F= AX
    jsimon@linear.com

    **LINEAR TECHNOLOGY CORPORATION** 
    *****Internet Email Confidentiality Notice***** 
     This e-mail transmission, and any documents, files or previous e= -mail messages attached to it may contain confidential informatio= n that is legally privileged. If you are not the intended recipie= nt, or a person responsible for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, = ;distribution or use of any of the information contained in or attache= d to this transmission is STRICTLY PROHIBITED. If you have receiv= ed this transmission in error, please immediately notify me by reply e-mail, or by telephone at     (510) 400-2936, and destroy the original transmission and its atta= chments without reading or saving in any manner. Thank you. =

     

    On Sep 12, 2013, at 12:53 PM, Thomas Watteyne wrote:=

     

    Jonathan,

     

    We are discussing the interaction between IEEE802.15= .4e and the RPL routing protocol in the 6TiSCH group (see minutes last call= at [1]).

     

    We have some questions about the "Join Priority= " field in the IEEE802.15.4e EB, in particular about how much an upper= layer (6top [2]) can influence its value. We want to make sure that we do = not break compliance with the IEEE802.15.4e standard.

     

    For reference, this is the text in IEEE802.15.4e (p.= 90):

     

    = The 1-octet Join Priority field can be used by a joining device to select among beaconing devices whe= n multiple beacons are heard. The PAN coordinator’s join priority is = zero. A lower value of join priority indicates that the device is th= e preferred one to connect to. The beaconing device’s join priority i= s the lowest join priority heard when it joined= the network plus one.

     

    We have the following discussions:

    1. After a node has joined, it might be moving to a different topological loca= tion. In that case, it should update the Join Priority it is announcing. Lu= ckily, RPL maintains the node's rank, a concept very similar to join priori= ty.
      Question: Can we have the 6top change the priority announced = by IEEE802.15.4e to the RPL rank (or a number calculated from the RPL rank)= after the node has joined?
    2. Your input is very welcome,

     

    Thomas

     

     

     


    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch

     

    --_000_E045AECD98228444A58C61C200AE1BD84147CA8Bxmbrcdx01ciscoc_-- From mehdi.sabzevari@yahoo.com Wed Sep 18 20:46:18 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 05F8111E8175 for <6tsch@ietfa.amsl.com>; Wed, 18 Sep 2013 20:46:18 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.621 X-Spam-Level: X-Spam-Status: No, score=0.621 tagged_above=-999 required=5 tests=[BAYES_50=0.001, HTML_MESSAGE=0.001, RCVD_IN_SORBS_WEB=0.619] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id p6jb21BRjbAj for <6tsch@ietfa.amsl.com>; Wed, 18 Sep 2013 20:46:11 -0700 (PDT) Received: from nm40.bullet.mail.ne1.yahoo.com (nm40.bullet.mail.ne1.yahoo.com [98.138.229.33]) by ietfa.amsl.com (Postfix) with ESMTP id 34A9711E80DC for <6tsch@ietf.org>; Wed, 18 Sep 2013 20:46:11 -0700 (PDT) Received: from [127.0.0.1] by nm40.bullet.mail.ne1.yahoo.com with NNFMP; 19 Sep 2013 03:46:09 -0000 Received: from [98.138.90.57] by nm40.bullet.mail.ne1.yahoo.com with NNFMP; 19 Sep 2013 03:43:21 -0000 Received: from [216.39.60.183] by tm10.bullet.mail.ne1.yahoo.com with NNFMP; 19 Sep 2013 03:43:20 -0000 Received: from [98.137.12.215] by tm19.bullet.mail.gq1.yahoo.com with NNFMP; 19 Sep 2013 03:43:20 -0000 Received: from [127.0.0.1] by omp1023.mail.gq1.yahoo.com with NNFMP; 19 Sep 2013 03:43:20 -0000 X-Yahoo-Newman-Property: ymail-4 X-Yahoo-Newman-Id: 616375.11209.bm@omp1023.mail.gq1.yahoo.com Received: (qmail 59920 invoked by uid 60001); 19 Sep 2013 03:43:20 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1379562199; bh=6UJkiuxXjNJX9mMntm3aUf3d3zGPkMzt4dC/iQNOzy8=; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:Message-ID:Date:From:Reply-To:Subject:To:Cc:MIME-Version:Content-Type; b=vc3tpl+kypqECgJTwNPZuRFlqq5C25WYWTONU2HVJXnDZuA5eQyrAQsXxZlmBO12IofNAS7sXlz6SmTzWRyhea3PaOe0V+l/EeoSxd3a2xSVSTgt8v6nHio+/TwsRcqNiLRipHm+ABB7Xn4wYLW7QUIsG9Cm2o+KpEgxWpRSzwU= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:Message-ID:Date:From:Reply-To:Subject:To:Cc:MIME-Version:Content-Type; b=lncOJwH7zf3IfhOlmZ4wnRG5rVHVNOfbqp3VD/PTByDlR8SE+ccVFGrEh+wuSaZ5i96DXy5VD67oG/B7kdKDp1KHz2whD1b+Lf3VMvS87krtpvD14jldFwIzF9Id9MXil8Ze1B5kmyMavYrCgPGsmoSnwCRWndw4Dtkety+454s=; X-YMail-OSG: xugOFdMVM1kgwXbBo2Eq6Xz.8De8HzGzJPN6Y2F9VKeAFh6 vr8Ysiky4_zCL3zRduObEamX3gCVd1GMhqqryxuUp0FYdD3.LrKIc35QKznp SB0ZXgEiWqaLP3AcR9CvDPKlA5Kir7f6GiFfTYZ3StrwUPpxGRddx3ntpBac Nf6dpl2N0a4jVp7bKUJeyBBuM8FBh_ZKIDPZeLLuOFSHQfBOV11xXz.sQ4cV M9MnHTqyUhjFjaI1CLEXKudutpo2TU2CjuRbtdfrgeBDoMzjX8UiJL4Fy6bs 6uhmSm1twMPlLrnxk0yLYUhTsdlCUzYArknIa0tF4e35.YNluExCnr1Tcl7Q .s2kYDOor2h8Q11F6wS6pbiT4p_WV4KAEQamENVvDZlMgocV9uh8aF96cWmt nDg3c3iD1C7kJdsecpGrRAKil5AOyuaGPGcRTb6wCotoORsoUj61Y3lQrIoH aOnrfwTGMiVdqD49wmHwV4gjgAa_2.5qHw8Gaw6AOhVCSj_TT_j16bNIgFKi GAVCJJtDJ.aO0wcnbovE_gjFi7Y2.lDInUIbjtgIK.LiB3h9SkXXqdw1zlUw Jh4hR_A1r10HIErNvh5ST8XHp4cfZS_mLddOrCyxi Received: from [77.36.232.129] by web121101.mail.ne1.yahoo.com via HTTP; Wed, 18 Sep 2013 20:43:19 PDT X-Rocket-MIMEInfo: 002.001, RGVhciBBbGwKSSBoYXZlIHR3byBxdWVzdGlvbiBhYm91dCB0aGUgYmVsb3cgc3RhdGUgZm9yIHNjaGVkdWxpbmcgb2YgdHdvwqBzaW11bHRhbmVvdXMgbGluayBhbmQgc2NoZWR1bGluZyBvZiBSeCBjZWxsKGxpbmspLgoKwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgQSAtLS0tLS0tLS0tPiBCIDwtLS0tLS0tLS0tLS1DCjEtIEluc2lkZSBCLCB3aXRoIHJlY2VpdmluZyBvZiBhZHZlcnRpc2VtZW50KEVCKSBmcm9tIHBlZXJzIEEgYW5kIEMsIFdoaWNoIHBlZXIgaXMgc2VsZWN0ZWQgYnkgQiBmb3IBMAEBAQE- X-Mailer: YahooMailWebService/0.8.157.561 Message-ID: <1379562199.53340.YahooMailNeo@web121101.mail.ne1.yahoo.com> Date: Wed, 18 Sep 2013 20:43:19 -0700 (PDT) From: mehdi sabzevari To: "6tsch@ietf.org" <6tsch@ietf.org> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-876742037-454395022-1379562199=:53340" Cc: "twatteyne@gmail.com" , "mohammad.nassiri78@gmail.com" , fabrice theoleyre Subject: [6tsch] scheduling link X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: mehdi sabzevari List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Sep 2013 03:46:18 -0000 ---876742037-454395022-1379562199=:53340 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Dear All=0AI have two question about the below state for scheduling of two= =A0simultaneous link and scheduling of Rx cell(link).=0A=0A=A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0 =A0 =A0 A ----------> B <------------C=0A1- Inside B, w= ith receiving of advertisement(EB) from peers A and C, Which peer is select= ed by B for scheduling of link? (I think here priority should exists)=0A2- = I'm confused a little about scheduling links as Rx, In fact, the motes how = find that a peer has data for it and it schedule a Rx link with it?=0A=A0 = =A0 For example in A-->B link, how B find that it should schedule link? I t= hink we have consider in OpenWSN that only senders can schedule a link. Is = this correct?=0A=0ARegards=0AMehdi ---876742037-454395022-1379562199=:53340 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
    Dear A= ll
    I have two question about the below state for scheduling of two simultaneous link and scheduling of Rx cell(link).=

                  =         A ----------> B <------------C
    1- Inside B, with receiving of advertisement(EB) from peers A and C,= Which peer is selected by B for scheduling of link? (I think here priority= should exists)
    2- I'm confused a little about scheduling li= nks as Rx, In fact, the motes how find that a peer has data for it and it s= chedule a Rx link with it?
        For example in A-->B link= , how B find that it should schedule link? I think we have consider in Open= WSN that only senders can schedule a link. Is this correct?
    =
    Regards
    Mehdi
    = ---876742037-454395022-1379562199=:53340-- From qinwang@berkeley.edu Thu Sep 19 12:57:02 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5B31121F8475 for <6tsch@ietfa.amsl.com>; Thu, 19 Sep 2013 12:57:02 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.548 X-Spam-Level: X-Spam-Status: No, score=-2.548 tagged_above=-999 required=5 tests=[AWL=0.428, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AKRMp4m1KLr5 for <6tsch@ietfa.amsl.com>; Thu, 19 Sep 2013 12:56:54 -0700 (PDT) Received: from mail-ie0-f179.google.com (mail-ie0-f179.google.com [209.85.223.179]) by ietfa.amsl.com (Postfix) with ESMTP id 1EAD721F844D for <6tsch@ietf.org>; Thu, 19 Sep 2013 12:56:53 -0700 (PDT) Received: by mail-ie0-f179.google.com with SMTP id e14so16756325iej.10 for <6tsch@ietf.org>; Thu, 19 Sep 2013 12:56:51 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=tQgjFGKcA8//pKRTxxMG2fPoEmYYKAg8Q7RE1b5S8FQ=; b=J6uBa4mzbdO5k0BHx8Kk4kuqudJYLROlibaR5ke/qruqwXYn1WCnHsDbtVKjgwpFQm KKP6+lhQHsweLjqnQVvw+fir1D3zO7gqUJR1459Sho1+kxS/rEvnJ7ihTwytxZhFKZ8f QC/5qmIGT5cgZiE2/lpWwE/vwjXHvG5h7Kbe4tisAbeVhmgKo5G39dNaxJwsYdty75DR E4lM5pyUAVxnbIVRmon4WRzdI55LbnZk9Nedq9jOXuyaHpmzXZYxuNJnRx+9HA/IeM6S NEXzJNaViwEq1wTqC7/zjdWPlBYIYXPTX7bDh5kXaf+SKADtt/e6k6L4gfDE77FaNdfr ToqA== X-Gm-Message-State: ALoCoQmFhCzLhVxqYdBTdNZP9ScKmOPvHxbbRXv1MPGnEs6iGFuxMR4peljuyvkCxOxLjwsdMWH9 MIME-Version: 1.0 X-Received: by 10.42.51.6 with SMTP id c6mr1960328icg.3.1379620611900; Thu, 19 Sep 2013 12:56:51 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Thu, 19 Sep 2013 12:56:51 -0700 (PDT) In-Reply-To: <1379562199.53340.YahooMailNeo@web121101.mail.ne1.yahoo.com> References: <1379562199.53340.YahooMailNeo@web121101.mail.ne1.yahoo.com> Date: Fri, 20 Sep 2013 03:56:51 +0800 Message-ID: From: Qin Wang To: mehdi sabzevari Content-Type: multipart/alternative; boundary=20cf301cc4567f579e04e6c1f49e Cc: "twatteyne@gmail.com" , "6tsch@ietf.org" <6tsch@ietf.org>, "mohammad.nassiri78@gmail.com" , fabrice theoleyre Subject: Re: [6tsch] scheduling link X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Sep 2013 19:57:02 -0000 --20cf301cc4567f579e04e6c1f49e Content-Type: text/plain; charset=ISO-8859-1 Hi Mehdi, (1) I think your question 1 is related with time source parent selection. Please see thread " time parent selection based on EB priority" for more information. (2) Regarding to your question 2, for dedicated cell reservation, the reservation is associated not only Tx side, but also Rx side. For example, node A and node B reserve slotOffest=5, channelOffset=12 to send data from node A to node B. That means node A may send data to node B at the cell, and node B should listen at the cell. If there is no data sent by node A at the cell, node B will go to sleep, otherwise, node B receives the data sent by node A. Regarding to how a pair of nodes reserve a cell for the communication between them, roughly speaking, there are two approaches, one is centralized approach, i.e. a center like PCE will set a cell to the pair of nodes with LinkType as Tx and Rx respectively; another is distributed approach, i.e. the pair of nodes negotiate with each other to select a cell for their communication. Make sense? Regards Qin On Thu, Sep 19, 2013 at 11:43 AM, mehdi sabzevari wrote: > Dear All > I have two question about the below state for scheduling of two simultaneous > link and scheduling of Rx cell(link). > > A ----------> B <------------C > 1- Inside B, with receiving of advertisement(EB) from peers A and C, Which > peer is selected by B for scheduling of link? (I think here priority should > exists) > 2- I'm confused a little about scheduling links as Rx, In fact, the motes > how find that a peer has data for it and it schedule a Rx link with it? > For example in A-->B link, how B find that it should schedule link? I > think we have consider in OpenWSN that only senders can schedule a link. Is > this correct? > > Regards > Mehdi > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --20cf301cc4567f579e04e6c1f49e Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Hi Mehdi,

    (1) I think your question 1 i= s related with time source parent selection. Please see thread " time = parent selection based on EB priority" for more information.

    (2) Regarding to your question 2, for dedicated cell reserva= tion, the reservation is associated not only Tx side, but also Rx side. For= example, node A and node B reserve slotOffest=3D5, channelOffset=3D12 to s= end data from node A to node B. That means node A may send data to node B a= t the cell, and node B should listen at the cell. If there is no data sent = by node A at the cell, node B will go to sleep, otherwise, node B receives = the data sent by node A. Regarding to how a pair of nodes reserve a cell fo= r the communication between them, roughly speaking, there are two approache= s, one is centralized approach, i.e. a center like PCE will set a cell to t= he pair of nodes with LinkType as Tx and Rx respectively; another is distri= buted approach, i.e. the pair of nodes negotiate with each other to select = a cell for their communication.

    Make sense?

    Regards
    = Qin



    On Thu, Sep 19, 2013 at 11:43 AM, mehdi sab= zevari <mehdi.sabzevari@yahoo.com> wrote:
    Dear All
    I have two question about the below state for scheduling of two= =A0simultaneous link and scheduling of Rx cell(link).
    =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 A ---= -------> B <------------C
    1- Inside= B, with receiving of advertisement(EB) from peers A and C, Which peer is s= elected by B for scheduling of link? (I think here priority should exists)<= /font>
    2- I'm co= nfused a little about scheduling links as Rx, In fact, the motes how find t= hat a peer has data for it and it schedule a Rx link with it?
    =A0 =A0 For e= xample in A-->B link, how B find that it should schedule link? I think w= e have consider in OpenWSN that only senders can schedule a link. Is this c= orrect?
    Regards
    Mehdi

    _____________________________________________= __
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch


    --20cf301cc4567f579e04e6c1f49e-- From twatteyne@gmail.com Thu Sep 19 15:35:56 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B839621F8CDD for <6tsch@ietfa.amsl.com>; Thu, 19 Sep 2013 15:35:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.555 X-Spam-Level: X-Spam-Status: No, score=-1.555 tagged_above=-999 required=5 tests=[AWL=0.422, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZO5v5NoVzvSN for <6tsch@ietfa.amsl.com>; Thu, 19 Sep 2013 15:35:55 -0700 (PDT) Received: from mail-pa0-x236.google.com (mail-pa0-x236.google.com [IPv6:2607:f8b0:400e:c03::236]) by ietfa.amsl.com (Postfix) with ESMTP id B7F5F21F8C20 for <6tsch@ietf.org>; Thu, 19 Sep 2013 15:35:55 -0700 (PDT) Received: by mail-pa0-f54.google.com with SMTP id kx10so10202237pab.13 for <6tsch@ietf.org>; Thu, 19 Sep 2013 15:35:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=Y0D2HBQbz5FkY16TwvuTdvXBV3ItSdTp7BeNCKvoGIc=; b=H1nmesHbvKZSh5J4haOmImrXuS1GwUzNujHjgKgWJBYC12CHrl6wbhxeQOqdMoBJVB k/Wb8cIozDABa23tmXxGPfgC8KFpwRLIZ+gFhpf2kcs1WTBFMd1nJa6AKvzHX+GbIJVc VdTFflrWr9IaQ+ClkcNhYwL3B9xanGEj+0jMvl5i99l8P1i35PRKvj58q1YpthS+Kj9r Nv8gox10eYKSbKsWDWBCOLQHbvrMN2eJueOG0xricJ8uxlYs5/Uj5gGUdGJDQzWg+vRj HyPQyeyP4a8dQ6PKpBjUhLURzTwlMMbkXhQb4+GC5gNMC3O9C5Yl10waP7pTqW6DLPR7 GuyQ== X-Received: by 10.68.239.168 with SMTP id vt8mr4297002pbc.125.1379630155358; Thu, 19 Sep 2013 15:35:55 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Thu, 19 Sep 2013 15:35:35 -0700 (PDT) From: Thomas Watteyne Date: Thu, 19 Sep 2013 15:35:35 -0700 X-Google-Sender-Auth: me5e9zYCHcwndiskn9ZvD9eevA0 Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b33d4ca54ea2004e6c42dcc Subject: [6tsch] Agenda webex 20 September 2013 X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Sep 2013 22:35:56 -0000 --047d7b33d4ca54ea2004e6c42dcc Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable All, The proposed agenda for the 6TiSCH call is: - Administrivia [4min] - Preparing for Vancouver [10min] - Updates to =93minimal=94 draft [10min] - Need for hysteresis in using RPL OF0 [15min] - Scoping of Work Item 2 [20min] - AOB [1min] You will find a detailed agenda at https://bitbucket.org/6tsch/meetings/wiki/130920_webex. As usual, feel free to propose any changes to the agenda, also at the beginning of the call. Remember that this call will be recorded. Pascal & Thomas ---- Topic: 6TSCH Weekly Time: 8:00 am, Pacific Daylight Time (San Francisco, GMT-07:00) Meeting Number: 206 802 913 Meeting Password: sixtus ------------------------------------------------------- To start the online meeting ------------------------------------------------------- 1. Go to https://ciscosales.webex.com/ciscosales/j.php?ED=3D219615007&UID=3D48190524= 2&PW=3DNZTRkNDAwOTE1&RT=3DMiMyMw%3D%3D 2. Log in to your account. 3. Click "Start Now". 4. Follow the instructions that appear on your screen. ---------------------------------------------------------------- ALERT:Toll-Free Dial Restrictions for (408) and (919) Area Codes ---------------------------------------------------------------- The affected toll free numbers are: (866) 432-9903 for the San Jose/Milpitas area and (866) 349-3520 for the RTP area. Please dial the local access number for your area from the list below: - San Jose/Milpitas (408) area: 525-6800 - RTP (919) area: 392-3330 ------------------------------------------------------- To join the teleconference only ------------------------------------------------------- 1. Dial into Cisco WebEx (view all Global Access Numbers at http://cisco.com/en/US/about/doing_business/conferencing/index.html 2. Follow the prompts to enter the Meeting Number (listed above) or Access Code followed by the # sign. San Jose, CA: +1.408.525.6800 RTP: +1.919.392.3330 US/Canada: +1.866.432.9903 United Kingdom: +44.20.8824.0117 India: +91.80.4350.1111 Germany: +49.619.6773.9002 Japan: +81.3.5763.9394 China: +86.10.8515.5666 To check whether you have the appropriate players installed for UCF (Universal Communications Format) rich media files, go to https://ciscosales.webex.com/ciscosales/systemdiagnosis.php http://www.webex.com CCM:+14085256800x206802913 --047d7b33d4ca54ea2004e6c42dcc Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
    All,

    The proposed agenda for= the 6TiSCH call is:
    • Administrivia=A0[4min]
    • Preparing for Vancouver=A0[10min]
    • Updates to =93minimal=94 draft=A0[10min]
    • Need for hysteresis in using RPL OF0=A0[15min]
    • Scoping of Work Item 2=A0[20min]
    • AOB=A0[1min]

    As usual, feel free to propose any changes to the= agenda, also at the beginning of the call.

    Rememb= er that this call will be recorded.

    Pascal & T= homas

    ----

    Topic: 6TSCH Weekly
    =
    Time: 8:00 am, Pacific Daylight Time (San Francisco, GMT-07:00)=A0
    Meeting Number: 206 802 913=A0
    Meeting Password: sixtus=A0=

    -------------------------------------------------------= =A0
    To start the online meeting=A0
    --------------------= -----------------------------------=A0
    2. Log in to your account.=A0
    3. Click "Start Now"= .=A0
    4. Follow the instructions that appear on your screen.=A0

    ----------------------------------------------------= ------------=A0
    ALERT:Toll-Free Dial Restrictions for (408) and (919) Area Codes=A0
    ----------------------------------------------------------------=A0=

    The affected toll free numbers are: (866) 432-9903 for the San Jose/Milpitas area and (866) 349-3520 for the RTP area.=A0

    Please dial the local access number for your area from = the list below:=A0
    - San Jose/Milpitas (408) area: 525-6800=A0
    - RTP (919) area: 392-3330=A0

    ------------= -------------------------------------------=A0
    To join the teleconference only=A0
    -------------------------= ------------------------------=A0
    1. Dial into Cisco WebEx (view = all Global Access Numbers at=A0
    2. Follow the prompts to enter the Meeting Number (listed above) or Ac= cess Code followed by the # sign.=A0

    San Jose, CA:= +1.408= .525.6800 RTP: +1.919.392.3330= =A0

    US/Canada: +1.866.432.9903 United Kingdo= m: +44.20.8824.0117=A0

    India: +91.80.4350.1111 Germany: +49.619.6773.9002=A0

    Japan: +81.3.5763.9394 China: +86.10.8515.5666=A0

    To check whether you have the appropriate players i= nstalled for UCF (Universal Communications Format) rich media files, go to = htt= ps://ciscosales.webex.com/ciscosales/systemdiagnosis.php=A0


    --047d7b33d4ca54ea2004e6c42dcc-- From twatteyne@gmail.com Fri Sep 20 14:02:20 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 41ABC21F9DF7 for <6tsch@ietfa.amsl.com>; Fri, 20 Sep 2013 14:02:20 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.381 X-Spam-Level: X-Spam-Status: No, score=-0.381 tagged_above=-999 required=5 tests=[AWL=-0.818, BAYES_40=-0.185, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id CYUpcFeR7YkA for <6tsch@ietfa.amsl.com>; Fri, 20 Sep 2013 14:02:16 -0700 (PDT) Received: from mail-pd0-x22a.google.com (mail-pd0-x22a.google.com [IPv6:2607:f8b0:400e:c02::22a]) by ietfa.amsl.com (Postfix) with ESMTP id B698821F9E39 for <6tsch@ietf.org>; Fri, 20 Sep 2013 14:02:15 -0700 (PDT) Received: by mail-pd0-f170.google.com with SMTP id x10so845022pdj.15 for <6tsch@ietf.org>; Fri, 20 Sep 2013 14:02:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=xSpOkvsk7bMALQlOhwQAugZxcq5AaS6cFMgIBvGRK7A=; b=A0ZqEgrv7QFnu6Rpdk7UUh1VrIKFcHiDap/FyECNuZw4WG+ifA3vC4YtWdzGLFate9 LtqgLpF1W/vaMXk+qyNEfLWDDSSECnUhFas4dTvXfwwxFZM9SrbFYjXKa3OrGUwQVsER NzTeqbM8os6li6lEw8IkCFGGFYSCaKtvBaUb7uyOh7sKwOKR1QSSiJjO18KUwh2V9l7j J0toJNeYCfSGQFs/Yr3dlB5gAnj1UvaFXGnd7Ll0dbHjn9LLpskuuyiis9b+Dr397rqo 6feBlWQ2sIrfaeQGdkIZPXvvGecSyUz/wSuCkQn0/TM7q99wUH/1c/KMYG7iNyC9saAB 2m3g== X-Received: by 10.68.129.201 with SMTP id ny9mr10228732pbb.70.1379710934686; Fri, 20 Sep 2013 14:02:14 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Fri, 20 Sep 2013 14:01:53 -0700 (PDT) From: Thomas Watteyne Date: Fri, 20 Sep 2013 14:01:53 -0700 X-Google-Sender-Auth: LigR05pqKFLcvAC2nrveugJUle0 Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b10cae527a2b604e6d6fc83 Subject: [6tsch] minutes webex 20 September 2013 X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Sep 2013 21:02:20 -0000 --047d7b10cae527a2b604e6d6fc83 Content-Type: text/plain; charset=ISO-8859-1 All, You will find the minutes of today's webex below. FYI, all the minutes and slides are archived a https://bitbucket.org/6tsch/meetings/. Thanks to Xavi for taking notes! As usual, fix anything we might have missed directly in the e-mail and reply. We will approve and adopt the minutes at the beginning of the next call. Thomas --- Minutes Webex 20 September 2013, 6TiSCH group Note: timestamps in PDT. Taking notes *(using Etherpad)* 1. Xavi Vilajosana 2. Thomas Watteyne Present *(alphabetically)* 1. Thomas Watteyne 2. Pascal Thubert 3. Alaeddine Weslati 4. Geraldine Texier 5. Guillaume Gaillard 6. Ken Bannister 7. Maria Rita Palattella 8. Nicola Accettura 9. Pouria Zand 10. Qin Wang 11. Raghuram Sudhaakar 12. Tina Tsou 13. Tom Phinney 14. Xavi Vilajosana Recording - Webex recording (audio+slides,streaming) - https://cisco.webex.com/ciscosales/lsr.php?AT=pb&SP=MC&rID=71580842&rKey=c5bf8edd4d83ae2e *[62min]* Slides - slides_130920_webex.ppt: slides shared during the call Agenda - Administrivia *[4min]* - Approval agenda - Approval minutes last call - WG news - Preparing for Vancouver *[10min]* - Updates to "minimal" draft *[10min]* - Need for hysteresis in using RPL OF0 *[15min]* - RFC6719 - Scoping of Work Item 2 *[20min]* - Examples report traffic - Ideas for scope and discussion - AOB *[1min]* Minutes - *[08.05]* Meeting starts - *[Thomas]* The group is at an interesting point. We have had many discussions. With 6 weeks left before Vancouver, good time to consolidate discussions in drafts. - *[08.05]* Administrivia *[4min]* - Approval agenda *Xavi* proposes to move his presentation on draft minimal at the end if time permits, or to next week. Change accepted. - Approval minutes last call No concerns raised on the call. Minutes approved. - WG news - Charting process in "External review" step. Scheduled for discussion by IESG on 09/26/2013 telechat. - Requested a 90min meeting slot during IETF 88 in Vancouver. - *[08.10]* Preparing for Vancouver *[10min]* - 6 weeks left to IETF 88 - Main objective for Vancouver: have documents ready for WG adoption - Charter items: minimal, architecture, models - Others (TSCH, terminlogy) - Show activity on other drafts (security, 6top) - *[Pascal]* Volunteers for information and data models draft(s)? - *[Qin]* Difference between information and data model? - *[Pascal]* See http://tools.ietf.org/html/rfc3444. "Information model" is abstract description of interactinos, "data model" is very concrete (bits-and-bytes). *Raghuram* and *Pouria* volunteer. *Xavi* happy to help review, but not author. *Thomas* happy to help define problems statement and follow process, but not author. - *[Pascal]* Thanks. You will need to elect one editor. - Second objective for Vancouver: informal interop and mini-demo - Objectives - informal - show implementations related to 6TiSCH - discuss implementation details - at the very best, show some interop of different implementations of the minimal draft - We might need to ask for a room? - *[Thomas]* It would be good to document goals and methods in a "implementers guide" draft. *Xavi* volunteers to participate. - *[Pascal]* Interop or demo? We might want invite IAB members to come take a look. - *[Thomas]* This is very early on, so let's not announce it as an official interop. - Updates to "minimal" draft *[10min]* Pushed to end of call, or next week. - Need for hysteresis in using RPL OF0 *[15min]* - See http://tools.ietf.org/html/rfc6719 - Requirement of pass a value boundary on rank in order to change parent (to avoid Hysteresis) - Experiment with other techniques: - stability counter. - delta threshold. - *[Xavi]* Should we add this to the minimal draft? - *[Pascal]* We could keep RFC6719 in minimal, use experiment to decide on hysteresis, and maybe push to ROLL in the future - *[Pascal]* Per the charter, at the end, our interest is to produce a recommendation - *[08.34]* Scoping of Work Item 2 *[20min]* - Intro *[Thomas]* - Thanks to volunteers to contribute to document - We need to scope work item 2 clearly. FYI, charter states: Produce an Information Model containing the management requirements of a 6TiSCH node. This includes describing how an entity can manage the TSCH schedule on a 6TiSCH node, and query timeslot information from that node. A data model mapping for an existing protocol (such as Concise Binary Object Representation (CBOR) over the Constrained Application Protocol (CoAP)) will be provided. - Start with presentationof example report flows by Pouria, followed by discussion - Examples report traffic *[Pouria]* - Pouria presents report traffic flow examples - ISA100.11a - Services to read/write/execute - interesting objects: candidates, neighbors, neighborDiag, channelDiag, alertPolicy - WirelessHART - metrics: device, neighbor, signal levels - Discussion/Questions - *[Xavi]* Do we want to focus our work in the same way as ISA/WirelessHART which is closed and restricted to a set of parameters, or rather go to a more open mechanism. - *[Thomas]* +1. Our goal is not to replicate ISA/WirelessHART. Information Pouria presented is an example, we want to make sure the mechanism we design support this type of interaction. We're looking for "outlier" type of interaction the CoAP-based solution we are designing might not cover. - *[Thomas]* Pouria, from this exercise, have you seen any type of interaction that CoAP might not be able to deal with? - *[Pouria]* A priori, it seems feasible to use CoAP. Although we need a more detailed investigation on CoAP. - *[Raghuram]* Extensibility is important, we need to come up with just the base of of commands and functionality we need, and allow for extensions. - *[Qin]* Clarifying question: Pouria's presentation did not touch on action and request flows. Do those not exist? - *[Pouria]* The application layer services include "execute", which can be mapped to the action flow we identified. - *[Thomas]* Let's not forget the decentralized case. - toward CoAP mapping *[Thomas]* - Important questions to answer for work item 2. CoAP related. These are just examples, but something like that could be answered by work item 2 draft. - What is the URI scheme going to look like? - possible example: coap://6t/ to access 6TiSCH resource - How to map methods? - possible example: PUT coap://6t/c/ to add a cell - How to allow extensions? - possible example: use profiles. GET coap://6t/p/ to access list - *[09.07]* AOB *[1min]* *Qin* and *Maria Rita* volunteer to contribute to the information model as well. - *[09.08]* Meeting ends --047d7b10cae527a2b604e6d6fc83 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    All,

    You will find the minut= es of today's webex below.

    Thanks to Xavi for taking notes!

    As usual, fix anything we might have missed directly in the e-mail and r= eply. We will approve and adopt the minutes at the beginning of the next ca= ll.

    Thomas

    ---

    Minutes Webex 20 September 2013, 6TiSCH group

    Note: timestamps in PDT.

    Taking notes=A0(using Etherpad)

    1. Xavi Vilajo= sana
    2. Thomas Watte= yne

    Present=A0(alphabetically)

    1. Thomas Watteyne<= /li>
    2. Pascal Thube= rt
    3. Alaed= dine Weslati
    4. Geraldine Texier
    5. Guillaume Gaillard
    6. Ken Bannister
    7. Maria Rita Palattella
    8. Nicola Accettura
    9. Pouria Zand
    10. Qin Wang
    11. Raghuram Sudhaakar
    12. Tina Tsou
    13. Tom Phinney
    14. Xavi Vilajosana

    Recording

    Slides

    Agenda

    • Administrivi= a=A0[4min]
      • Approval agenda
        • <= li style=3D"margin:10px 0px;padding:0px;word-wrap:break-word"> Approval minutes last call
      • WG news
    • Preparing for Vancouver=A0[10min]
    • Updates to "minimal" draft=A0[10min]
    • Need for hysteresis in usin= g RPL OF0=A0[15min]
        <= li style=3D"margin:10px 0px;padding:0px;word-wrap:break-word"> RFC6719
    • Scoping of Work Item 2=A0[20min]
      • Examples report traffic
      • Ideas for scope and discussion
    • AOB=A0[1min]
      • =

    Minutes

    • [08.05]<= /em>=A0Meeting starts
      • [Thomas]=A0The group is at an interesting point. We have had many discussions.= With 6 weeks left before Vancouver, good time to consolidate discussions i= n drafts.
    • [08.05]=A0Administrivia=A0[4min]
      • Approval agenda

        Xavi=A0proposes to move his presentation on draft minimal = at the end if time permits, or to next week. Change accepted.

      • Appr= oval minutes last call

        No concerns raised= on the call. Minutes approved.

      • WG news
        • Charting pro= cess in "External review" step. Scheduled for discussion by IESG = on 09/26/2013 telechat.
        • Requested a 90min meeting slot during IETF 88 in Vancouver.
        • <= /ul>
      • [08.10]=A0Preparing for Vancouver=A0[10min]
        • 6 weeks left= to IETF 88
        • Main objective for Vancouver: have documents ready for WG adoption
          • Charter item= s: minimal, architecture, models
          • Others (TSCH, terminlogy)
          • Show activity on other drafts (security, 6top)
          • [Pascal]=A0Voluntee= rs for information and data models draft(s)?
          • [Qin]=A0Difference between information and data model?
          • [Pa= scal]=A0See=A0http://t= ools.ietf.org/html/rfc3444. "Information model" is abstract d= escription of interactinos, "data model" is very concrete (bits-a= nd-bytes).

            Raghuram=A0and=A0Pouria=A0volunteer.=A0Xavi=A0happy to help review, but not author.=A0Thomas=A0happy= to help define problems statement and follow process, but not author.

          • [Pascal]=A0Thanks. You will need to elect one editor= .
        • Second objective for Vancouver: informal interop and mini-demo
          • Objectives
            • informal
            • show implem= entations related to 6TiSCH
            • discuss implementation details
            • at the very best, show some interop of different imp= lementations of the minimal draft
          • We might need to ask for a room?
          • [Thomas]=A0It would be good to do= cument goals and methods in a "implementers guide" draft.

            Xavi=A0volunteers to participate.

          • [Pascal]=A0Inter= op or demo? We might want invite IAB members to come take a look.
          • [Tho= mas]=A0This is very early on, so let's not announce it as an o= fficial interop.
      • Updates to "minimal" draft=A0[10min]

        Pushed to end of call, or next week.

      • Need for hysteresis in using = RPL OF0=A0[15min]
          See=A0http://tools.ietf.org/html/= rfc6719
        • Requirement of pass a value boundary on rank in order to change parent = (to avoid Hysteresis)
        • Experiment w= ith other techniques:
          • stability counter.
          • delta thresh= old.
        • [Xavi]=A0Should we add this to the minimal draft?
        • [Pas= cal]=A0We could keep RFC6719 in minimal, use experiment to decide = on hysteresis, and maybe push to ROLL in the future
        • [Pascal]=A0Per the charter, at the end, our interest is to= produce a recommendation
      • [08.34]=A0Scoping of Work Item 2=A0[20min]
        • Intro=A0[Thomas]
          • Thanks to volunteers= to contribute to document
          • We need to s= cope work item 2 clearly. FYI, charter states:

            Produce an Informa= tion Model containing the management requirements of a 6TiSCH node. This in= cludes describing how an entity can manage the TSCH schedule on a 6TiSCH no= de, and query timeslot information from that node. A data model mapping for= an existing protocol (such as Concise Binary Object Representation (CBOR) = over the Constrained Application Protocol (CoAP)) will be provided.

          • Start with presentationof example report flows by Pouria, followed by= discussion
        • Examples report traffic=A0[Pouria]
          • Pouria presents report traffic flow examples
          • ISA100.11a
            • Services to read/write/execute<= /li>
            • interest= ing objects: candidates, neighbors, neighborDiag, channelDiag, alertPolicy<= /li>
          • Wi= relessHART
            • metrics: device, neighbor, sign= al levels
        • Discussion/Questions
            <= li style=3D"margin:10px 0px;padding:0px;word-wrap:break-word">[Xavi= ]=A0Do we want to focus our work in the same way as ISA/WirelessHA= RT which is closed and restricted to a set of parameters, or rather go to a= more open mechanism.
          • [Tho= mas]=A0+1. Our goal is not to replicate ISA/WirelessHART. Informat= ion Pouria presented is an example, we want to make sure the mechanism we d= esign support this type of interaction. We're looking for "outlier= " type of interaction the CoAP-based solution we are designing might n= ot cover.
          • [Tho= mas]=A0Pouria, from this exercise, have you seen any type of inter= action that CoAP might not be able to deal with?
          • [Pouria]=A0A priori, it seems feasible to use CoAP. Althou= gh we need a more detailed investigation on CoAP.
          • [Raghuram]=A0Ext= ensibility is important, we need to come up with just the base of of comman= ds and functionality we need, and allow for extensions.
          • [Qin= ]=A0Clarifying question: Pouria's presentation did not touch o= n action and request flows. Do those not exist?
          • [Pouria]=A0The application layer services include "ex= ecute", which can be mapped to the action flow we identified.
          • [Thomas]= =A0Let's not forget the decentralized case.
        • to= ward CoAP mapping=A0[Thomas]
          • Important questions to answer for work item 2. CoAP related. These are just= examples, but something like that could be answered by work item 2 draft.<= /li>
          • What is = the URI scheme going to look like?
            • possible exa= mple:=A0coap://6t/=A0to access 6TiSCH resource=
          • Ho= w to map methods?
            • possible example:=A0PUT coap://6t/c/=A0to add a cell
          • Ho= w to allow extensions?
            • possible example: u= se profiles.=A0GET coap://6t/p/=A0to access li= st
      • [09.07]=A0AOB=A0[1min]
        Qin=A0and=A0Maria Rita=A0volunteer to contribute to the inf= ormation model as well.

      • [09.08]=A0Meeting ends
    --047d7b10cae527a2b604e6d6fc83-- From qinwang@berkeley.edu Tue Sep 24 13:56:23 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5562B21F941F for <6tsch@ietfa.amsl.com>; Tue, 24 Sep 2013 13:56:22 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.584 X-Spam-Level: X-Spam-Status: No, score=-2.584 tagged_above=-999 required=5 tests=[AWL=0.392, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id nKrQ-vRh67x4 for <6tsch@ietfa.amsl.com>; Tue, 24 Sep 2013 13:56:15 -0700 (PDT) Received: from mail-ie0-f176.google.com (mail-ie0-f176.google.com [209.85.223.176]) by ietfa.amsl.com (Postfix) with ESMTP id F2A6B21F9D38 for <6tsch@ietf.org>; Tue, 24 Sep 2013 13:55:08 -0700 (PDT) Received: by mail-ie0-f176.google.com with SMTP id as1so9339930iec.7 for <6tsch@ietf.org>; Tue, 24 Sep 2013 13:55:07 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to :content-type; bh=Gp0zJobHrjCa+U+e5IztuLugGnH07qscpqUhTrd2Jfg=; b=e9y1dywk+VciAMWcPg+lxs1Z/B5LddD/MBGR3tDInlF4Py+3ScNPf2tPwLkIliiM5X bGfvMXRZFRysFaEmZh7VVLwPZxlDrLmcyCGroPOpi3yOsYUivhtU71zMMxCX/K1Zp7x6 a2sTJ4IvyIEf2HoThCQYg5GGIanm6rS6iBVRDMbq80PnFoiBS5uZvb+SF2ucNIEcKLF7 wQGUxe5IBIU0Z454F/s60pOFWIKKTspHxeknYAOJqqnmhE6zzozkG0xAYB2zaj4scU+C kppNYAEBShyXvnZx85EP6AyZpzH/4JJUGrX/0o3X4h10U1VXNh3c6PMG7LtebhCLqJeC ShZQ== X-Gm-Message-State: ALoCoQnQOn2M+9RMg1iZm1kFdMrIzYe7rt57WZLZfMlQ584/EGKfwvsjrdLA11QyCsqJiEqFNsZ7 MIME-Version: 1.0 X-Received: by 10.43.104.73 with SMTP id dl9mr12293732icc.39.1380056107307; Tue, 24 Sep 2013 13:55:07 -0700 (PDT) Received: by 10.64.139.234 with HTTP; Tue, 24 Sep 2013 13:55:07 -0700 (PDT) Date: Wed, 25 Sep 2013 04:55:07 +0800 Message-ID: From: Qin Wang To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=bcaec5171bf10be49504e7275a0c Subject: [6tsch] comments on Minimal 6TiSCH draft X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Sep 2013 20:56:23 -0000 --bcaec5171bf10be49504e7275a0c Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Xavi and all, I have just read the Minimal 6TiSCH draft at https://bitbucket.org/6tsch/draft-vilajosana-6tsch-basic/src. Here are my comments. Typos: (1) In section 2, =932. Minimal schedule=94 =3D> =932. Minimal schedule configuration=94 (2) In section 2.2, =93has a bitmap of cell options assigned.=94 =3D> =93h= as a bitmap of cell options assigned, named LinkOption.=94 (3) In section 3.2, =93Frame and Link IE=94 =3D> =93Frame and Cell IE=94 (4) In section 5.3, =93The Slot and Link IE contains the ASN and 1 Byte fie= ld named Join Priority.=94 =3D> =93The Sync IE contains the ASN and 1 Byte fie= ld named Join Priority.=94 Questions: (1) In section 5.1, ETX is a measure for calculating OF, or a OF? (2) need some sentences about how to set DAGRank to Join Priority. In IEEE802.15.4e, table 52b, Range of Join Priority is 0x0000~0x03ff. I=92m not sure if it is a fixed range. If yes, we need to do something or say something in the draft. Thanks Qin --bcaec5171bf10be49504e7275a0c Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
    Hi Xavi and all,

    I have just read the M= inimal 6TiSCH draft=A0at=A0htt= ps://bitbucket.org/6tsch/draft-vilajosana-6tsch-basic/src. Here are my = comments.

    Typos:=A0

    = (1) In section 2, =A0=932. Minimal schedule=94 =3D> =932. Minimal schedule configuration=94

    (2) In section 2.2, =93has a bitmap of c= ell options assigned.=94 =A0=3D> =93has a bitmap of cell options assigned, named LinkOption.=94

    (3) In section 3.2, =93Frame and Link IE= =94 =3D> =93Frame and Cell IE=94

    (4) In section 5.3, =93The Slot and Link= IE contains the ASN and 1 Byte field named Join Priority.=94 =3D> =93The Sync IE contain= s the ASN and 1 Byte field named Join Priority.=94

    Questions:

    (1) In s= ection 5.1, ETX is a measure for calculating OF, or a OF?

    (2) need some sentences about= how to set DAGRank to Join Priority.=A0

    In IEEE802.15.4e, table 52b, Range of Join Priority is 0x0000~0x03ff. I=92m not sure if it is a fixed range. If yes, w= e need to do something or say something in the draft.=A0

    Thanks

    Qin

    --bcaec5171bf10be49504e7275a0c-- From xvilajosana@berkeley.edu Tue Sep 24 14:13:39 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F083621F8C93 for <6tsch@ietfa.amsl.com>; Tue, 24 Sep 2013 14:13:38 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.276 X-Spam-Level: X-Spam-Status: No, score=-2.276 tagged_above=-999 required=5 tests=[AWL=0.700, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BiSfFwVL79BK for <6tsch@ietfa.amsl.com>; Tue, 24 Sep 2013 14:13:35 -0700 (PDT) Received: from mail-pa0-f45.google.com (mail-pa0-f45.google.com [209.85.220.45]) by ietfa.amsl.com (Postfix) with ESMTP id A3FE621F9C0D for <6tsch@ietf.org>; Tue, 24 Sep 2013 14:13:30 -0700 (PDT) Received: by mail-pa0-f45.google.com with SMTP id rd3so4231613pab.18 for <6tsch@ietf.org>; Tue, 24 Sep 2013 14:13:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=3uwQyXvGPUkoQ5+tx12JBoFIwQvCmk7bAIOuLzq/SM4=; b=Hdu3HDqzxtXIuIdCkhXXexNAC3sbUxEJ2G+eUfZOcpTBX0XS8DhkpXPjOrK6Zx1Ugy 8UNWOcG29lc6GoQ6NeGbIPMJ3qS6JWhrRhJEJEuziulBMxRYiXHp7vkBloqdk57MvfuJ QzwK2kbyG/gAjjzC/n97zhkblD4h99PG9FRtqxoeX/XATXDycfcezo9ryfGvDQdR2juq P0v0rTrPtQEHbG6r7IOi8G+dhsSWX3CoPEtvLsmXpYdk+KWivbuOscKOWNkJ/hcaRD0G d+gmTj+5E3NsaIa/9PNbbqDWNfAUH6thepUqkVzVfbSU0sdckS1PdhBoVPMduTgnofeH 9Mbw== X-Gm-Message-State: ALoCoQl3ydoay0rSDexJ8h7zIzBP/j8z+hm4b68kVINvg+awYDM4qmYuuAmYAFfEQl4Dx+9no72G MIME-Version: 1.0 X-Received: by 10.68.11.41 with SMTP id n9mr8020211pbb.164.1380057210207; Tue, 24 Sep 2013 14:13:30 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Tue, 24 Sep 2013 14:13:30 -0700 (PDT) In-Reply-To: References: Date: Tue, 24 Sep 2013 14:13:30 -0700 Message-ID: From: Xavier Vilajosana Guillen To: Qin Wang Content-Type: multipart/alternative; boundary=bcaec5215955c8cb3204e7279bfe Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] comments on Minimal 6TiSCH draft X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Sep 2013 21:13:39 -0000 --bcaec5215955c8cb3204e7279bfe Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Qin, thanks for the comments! I will review the document accordingly. as regards to 2) I agree. I will add a setence as regards to 1) yes, 5.1 should state the OF instead of ETX.. e.g An example RPL objective function is the OF Zero as described in Section 7.1 and RFC6552. thanks! X On Tue, Sep 24, 2013 at 1:55 PM, Qin Wang wrote: > Hi Xavi and all, > > I have just read the Minimal 6TiSCH draft at > https://bitbucket.org/6tsch/draft-vilajosana-6tsch-basic/src. Here are my > comments. > > Typos: > > (1) In section 2, =932. Minimal schedule=94 =3D> =932. Minimal schedule > configuration=94 > > (2) In section 2.2, =93has a bitmap of cell options assigned.=94 =3D> = =93has a > bitmap of cell options assigned, named LinkOption.=94 > > (3) In section 3.2, =93Frame and Link IE=94 =3D> =93Frame and Cell IE=94 > > (4) In section 5.3, =93The Slot and Link IE contains the ASN and 1 Byte > field named Join Priority.=94 =3D> =93The Sync IE contains the ASN and 1 = Byte > field named Join Priority.=94 > > Questions: > > (1) In section 5.1, ETX is a measure for calculating OF, or a OF? > > (2) need some sentences about how to set DAGRank to Join Priority. > > In IEEE802.15.4e, table 52b, Range of Join Priority is 0x0000~0x03ff. I= =92m > not sure if it is a fixed range. If yes, we need to do something or say > something in the draft. > > Thanks > > Qin > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --bcaec5215955c8cb3204e7279bfe Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
    Hi Qin,

    thanks for the comments! I = will review the document accordingly.
    as regards to 2) I agre= e. I will add a setence

    as regards to 1) yes, 5.1 should state= the OF instead of ETX.. e.g 
    An example RPL objective function is the OF Zero as d=
escribed in Section 7.1 and RFC6552.
    =A0 <=
br>
    thanks!
    X




    On Tue, Sep 24, 2013 at 1:55 PM, Qin Wan= g <qinwang@berkeley.edu> wrote:
    Hi Xavi and all,

    I have just read the M= inimal 6TiSCH draft=A0at=A0htt= ps://bitbucket.org/6tsch/draft-vilajosana-6tsch-basic/src. Here are my = comments.

    Typos:=A0

    (1) In sect= ion 2, =A0=932. Minimal schedule=94 =3D> =932. Minimal schedule configuration=94

    (2) In section 2.2, =93has a bitmap of cell options assigned.=94 =A0=3D> =93has a bitmap of cell options assigned, named LinkOption.=94

    (3) In section 3.2, =93Frame and Link IE=94 =3D>= =93Frame and Cell IE=94

    (4) In section 5.3, =93The Slot and Link IE contain= s the ASN and 1 Byte field named Join Priority.=94 =3D> =93The Sync IE contain= s the ASN and 1 Byte field named Join Priority.=94

    = Questions:

    (1) In section 5.1, ETX is a m= easure for calculating OF, or a OF?

    (2) need some sentences about how to set DAGRank to Join Priority.=A0

    In IEEE8= 02.15.4e, table 52b, Range of Join Priority is 0x0000~0x03ff. I=92m not sure if it is a fixed range. If yes, w= e need to do something or say something in the draft.=A0

    Thanks

    Qin


    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch


    --bcaec5215955c8cb3204e7279bfe-- From twatteyne@gmail.com Thu Sep 26 13:05:37 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C592E21E8099 for <6tsch@ietfa.amsl.com>; Thu, 26 Sep 2013 13:05:36 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.529 X-Spam-Level: X-Spam-Status: No, score=-1.529 tagged_above=-999 required=5 tests=[AWL=0.448, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id OBweD+NjRofY for <6tsch@ietfa.amsl.com>; Thu, 26 Sep 2013 13:05:35 -0700 (PDT) Received: from mail-pa0-x22e.google.com (mail-pa0-x22e.google.com [IPv6:2607:f8b0:400e:c03::22e]) by ietfa.amsl.com (Postfix) with ESMTP id 92ADF21E808E for <6tsch@ietf.org>; Thu, 26 Sep 2013 13:05:33 -0700 (PDT) Received: by mail-pa0-f46.google.com with SMTP id fa1so1793130pad.33 for <6tsch@ietf.org>; Thu, 26 Sep 2013 13:05:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=6xsWdsV/8fks6tMeimJcg5if/2rnfbajjgTMP4HES6Y=; b=OnGBUneUONInmMBtXH6oBqtTNLU8QFbuBJB+46Wu0N/+OoHerlC0idsBLc0Owt4S5I pcKwqUvnw6VYmzde2JSysheXRJCmZM61tat1ltN0DUrVS0/Lp2yrDU5UZ9Atchihzths Qb5ab3DvUg+Q870BzR4+wBRbuihHRabhw9Sb9CvgilJuJF5ag6yMYm12BkPCCWU2j/I0 zT2WsXY2cQmF80MkVaISj5TtydtWHay0PLbksI7UNshHJYw4S65gZekZIecA7NXKH0Bi Jio/sjTDJ5GgYzjvBs92qCp3qP8JaKR7eaNbvc1AJH8bTxgtco0Bs9XlxhpjAd4++nSM F+5Q== X-Received: by 10.68.196.227 with SMTP id ip3mr3042517pbc.163.1380225932544; Thu, 26 Sep 2013 13:05:32 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Thu, 26 Sep 2013 13:05:12 -0700 (PDT) From: Thomas Watteyne Date: Thu, 26 Sep 2013 13:05:12 -0700 X-Google-Sender-Auth: wN8ChGPy7ba4CbzI9aMLw2VSpdI Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=e89a8ff1c81e6b542504e74ee4c8 Subject: [6tsch] minutes discussion models draft X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2013 20:05:37 -0000 --e89a8ff1c81e6b542504e74ee4c8 Content-Type: text/plain; charset=ISO-8859-1 All, We had *very* interesting discussions with "models draft" volunteers by e-mail and on a call on Wednesday. The minutes of the wednesday discussion are available at https://bitbucket.org/6tsch/meetings/wiki/130925_webex_models_draft, and copy-pasted below. Please let me know if I forgot something. We will continue this discussion on the call tomorrow. Looking forward. Thomas PS: who took notes over Etherpad on the call on Wednesday? Your name wasn't entered in Etherpad. --- Minutes Webex 25 September 2013, 6TiSCH group, models draft team Note: timestamps in PDT. Taking notes *(using Etherpad)* 1. Thomas Watteyne 2. ?? Present *(alphabetically)* 1. Maria Rita Palattella 2. Pascal Thubert 3. Pouria Zand 4. Qin Wang 5. Raghuram Sudhaakar 6. Thomas Watteyne Goal This is a one-off discussion between the member of the models draft team. Minutes are listed here for completeness. Its goal is to discuss the scope and details of the information and data model for 6TiSCH. Formal Round-table. Question asked: "what are your ideas about scope?" Minutes - *[08.02]* meeting starts - *Raghuram* - Previous work done in the context of databases. - Defined how different tables of a database are interacting (data model in the context of databases). - Extrapolating to 6TiSCH: data model is definition of messages. - What fields do we want in each message (and their meaning). - Table in a database are messages in 6TiSCH. - Information model: define the interaction (what query needs to be directed to what tables?). - We want to define the message flows. - Questions: messages flow are already in the 6top draft. What are we defining differently? About how do we name URI and map method: has to be part of new document. - *[Pascal]* We need to define at UML level. - *[Raghuram]* Information model is message flows? - *[Pascal]* Information model is static. Content of messages. Flow on top of information model. We need both models. - *Thomas* - 6top is at the core of what we do. - In the end, we will define 2 mechanisms - mote interacts with neighbor - entity interacts with 6top sublayer of mote multiple hops away (CoAP) - These mechanisms allow for many different interaction models: - decentralized RSVP-like reservation - purely centralized (e.g. TASA) - on-the-fly decentralized reservation - cluster-based model - etc. - Someone can take these mechanisms and develop some interaction model, while staying standards compliant. - Scope of this draft: give access to 6top over CoAP - Resources (URIs) - Method (GET/PUT/POST/DELETE) - Profiles - Triggers - *[Pascal]* Interaction model is a dynamic view as opposed to the information layer which is static model. - *[Pascal]* We want interaction model as well as information model. - *Qin* - There are 3 things associated with data/information model: - Management Information Base (MIB), i.e. the 6top database - message formats (TLV, etc.) - control flows (interaction between entities) - The messages can be configurable. We need to define define a mechanism to define messages. - Different applications can require different formats. We can not define every message, but define mechanism. - About control flow: what can the network reuse? centralized or distributed. The flows we defined now is just one of many. - *[Pascal]* information model could be the same. - *Maria Rita* - We can imagine a case in which centralized and distributed models are mixed. - What we define for centralized can be reused for decentralized. - *[Thomas]* People can use the mechanisms defined to explore different triggers. We need not define all possible scenarios. - *[Maria Rita]* we need to be extensible. We are considering only PCE so far. We could imagine networks with several PCEs, etc. We need to be as general as extensible as possible. - The data model should define the message formats. Quite clear. - The information model should contain the interaction model, i.e. in which way the information is exchanged. - *[Raghuram]* the data model needs to include CoAP and payload format. - *[Maria Rita]* we need to keep an eye open for methods different from CoAP. - *[Pascal]* we might not be using CoAP for mote-to-mote 6top communication. Information model could. - *Pouria* - Agree with Pascal: we need to differentiate between information and interaction model. - Can we use CoAP for 6top-to-6top? - *[Thomas]* This is already defined in the current 6top draft. Qin & Xavi proposed a number of IEEE802.15.4e information elements to do the negotiation between neighbors. To communicate between 2 neighbors the current proposal is to use these IEs, not CoAP. - *[Qin]* Agreed. - I see 3 mechanisms: - CoAP-to-6top (multiple hops) - 6top-6top (single hop reservation of soft cells) - RSVP-like reservation - *[Thomas]* agreed with extra mechanism - *[All]* consensus that we will get there, but RSVP needs more investigation. - *[Maria Rita]* Should we take a top-down approach or bottom-up approach? - *[Thomas]* define the 6top interfaces which is one of building blocks to communicate with 6top nodes from other places. TASA can be another model. - *[Qin]* what is the role of CBOR? - *[Thomas]* [Thomas] format of the CoAP payload - *Pascal* - Summary for what we agreed on: - start bottom-up: data model first - 3 models: interaction, data, information - CoAP: - minimal base - extensible by profiles - profiles means that discovery is required - *[09.06]* meeting ends --e89a8ff1c81e6b542504e74ee4c8 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    All,

    We had very interesting dis= cussions with "models draft" volunteers by e-mail and on a call o= n Wednesday.

    The minutes of the wednesday discussi= on are available at=A0https://bitbucket.org/6tsch/meetings/wiki/130925= _webex_models_draft, and copy-pasted below.

    Please let me know if I forgot something.
    We will continue this discussion on the call tomorrow. Looking = forward.

    Thomas

    PS: who t= ook notes over Etherpad on the call on Wednesday? Your name wasn't ente= red in Etherpad.

    ---

    Minutes Webex 25 September 2013, 6TiSCH group, models draft team

    Note: timesta= mps in PDT.

    Taking notes=A0(using Eth= erpad)

    1. Thomas Watteyne
    2. ??

    Present=A0(alphabe= tically)

    1. Maria Rita Palattella
    2. Pascal Thubert
    3. Pouria Zand
    4. Qin Wang
    5. Raghuram Sudhaakar
    6. Thomas Watteyne

    Goal

    This is a one-off discussion between the member of the models draft team.= Minutes are listed here for completeness.

    Its goa= l is to discuss the scope and details of the information and data model for= 6TiSCH.

    Formal

    Round-table. Question asked: "what are your ideas about scope?"

    Minutes

    • [08.02]=A0meeting starts
    • Raghuram
      • Previous work do= ne in the context of databases.
      • Defined how different tables of a database are interacting (data model in t= he context of databases).
      • Extrapolating to 6TiSCH: data model is definition of mess= ages.
      • What fields = do we want in each message (and their meaning).
      • Table in a database are messages in= 6TiSCH.
      • Information = model: define the interaction (what query needs to be directed to what tabl= es?).
      • We= want to define the message flows.
      • Questions: m= essages flow are already in the 6top draft. What are we defining differentl= y? About how do we name URI and map method: has to be part of new document.=
      • [Pas= cal]=A0We need to define at UML level.
      • [Raghuram]=A0Infor= mation model is message flows?
      • [Pas= cal]=A0Information model is static. Content of messages. Flow on t= op of information model. We need both models.
    • Thomas
      • 6top is at the cor= e of what we do.
      • In the end, we will define 2 mechanisms
        • mo= te interacts with neighbor
        • entity interacts with 6top sublayer of mote multiple hops away (CoAP)
          • <= /ul>
        • The= se mechanisms allow for many different interaction models:
          • decentralize= d RSVP-like reservation
          • purely centralized (e.g. TASA)
          • on-the-fly decentralized reservation
          • cluster-based model
          • etc.
        • Someone can take these mechanisms and develop some interaction model, while= staying standards compliant.
        • Scope of this draft: give access to 6top over CoAP
        • Resources (U= RIs)
        • Met= hod (GET/PUT/POST/DELETE)
        • Profiles
        • Triggers
      • [Pascal]=A0Interaction model is a dynamic view= as opposed to the information layer which is static model.
      • [Pas= cal]=A0We want interaction model as well as information model.
    • <= strong>Qin
      • There are 3 = things associated with data/information model:
        • Management Information Base (MIB), i.e. the 6top database
        • message formats (TLV, etc= .)
        • contr= ol flows (interaction between entities)
      • Th= e messages can be configurable. We need to define define a mechanism to def= ine messages.
      • Different applications can require different formats. We can not define eve= ry message, but define mechanism.
      • About control flow: what can the network reuse? c= entralized or distributed. The flows we defined now is just one of many.
      • [Pas= cal]=A0information model could be the same.
    • Maria Rita
      • We can imagi= ne a case in which centralized and distributed models are mixed.
      • What we define for= centralized can be reused for decentralized.
      • [Tho= mas]=A0People can use the mechanisms defined to explore different = triggers. We need not define all possible scenarios.
      • [Maria Rita]=A0we need to be extensible. We are considerin= g only PCE so far. We could imagine networks with several PCEs, etc. We nee= d to be as general as extensible as possible.
      • The data model should define the message formats. Quite clear.
      • The information mode= l should contain the interaction model, i.e. in which way the information i= s exchanged.
      • [Rag= huram]=A0the data model needs to include CoAP and payload format.<= /li>
      • = [Maria Rita]=A0we need to keep an eye open for methods different f= rom CoAP.
      • [Pas= cal]=A0we might not be using CoAP for mote-to-mote 6top communicat= ion. Information model could.
    • Pouria
      • Agree with Pascal:= we need to differentiate between information and interaction model.
        • Can we use CoAP for 6top-to-6top?
      • [Thomas]=A0This is already defin= ed in the current 6top draft. Qin & Xavi proposed a number of IEEE802.1= 5.4e information elements to do the negotiation between neighbors. To commu= nicate between 2 neighbors the current proposal is to use these IEs, not Co= AP.
      • [Qin= ]=A0Agreed.
      • I see 3 mechanisms:
        • CoAP-to-6top (multiple hops)
        • 6top-6top (single hop reservation of soft cells)
          • <= li style=3D"margin:10px 0px;padding:0px;word-wrap:break-word">RSVP-like res= ervation
      • [Thomas]=A0agreed with extra mechanism
      • [All]=A0cons= ensus that we will get there, but RSVP needs more investigation.
      • [Mar= ia Rita]=A0Should we take a top-down approach or bottom-up approac= h?
      • [Thomas]=A0define the 6top interfaces which is one of building = blocks to communicate with 6top nodes from other places. TASA can be anothe= r model.
      • [Qin= ]=A0what is the role of CBOR?
      • [Thomas]=A0[Thomas] format = of the CoAP payload
    • Pascal
      • Summary for what we = agreed on:
        • start bottom= -up: data model first
        • 3 models: interaction, data, information
        • CoAP:
          • minimal base
          • extensible by profiles
          • profiles means that discovery is required
    • [09.06]= =A0meeting ends
    --e89a8ff1c81e6b542504e74ee4c8-- From twatteyne@gmail.com Thu Sep 26 13:23:11 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 79AA421E80B1 for <6tsch@ietfa.amsl.com>; Thu, 26 Sep 2013 13:23:11 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.259 X-Spam-Level: X-Spam-Status: No, score=-1.259 tagged_above=-999 required=5 tests=[AWL=0.118, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_46=0.6, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JiAoyjujq0bj for <6tsch@ietfa.amsl.com>; Thu, 26 Sep 2013 13:23:10 -0700 (PDT) Received: from mail-pa0-x22a.google.com (mail-pa0-x22a.google.com [IPv6:2607:f8b0:400e:c03::22a]) by ietfa.amsl.com (Postfix) with ESMTP id DBA4511E80DE for <6tsch@ietf.org>; Thu, 26 Sep 2013 13:23:09 -0700 (PDT) Received: by mail-pa0-f42.google.com with SMTP id lj1so1829568pab.1 for <6tsch@ietf.org>; Thu, 26 Sep 2013 13:23:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=kVKsCuWpLHkltJRhvmcnvWw2CETS6XJdWqulKr5iae8=; b=gqtFI3FfdIgeZ3GOX6hZAcRX4OaTXc3uUmLYWvAaYCpSqMI+73RuexbyRuKUUO0FI8 7z4wWECF/1kIFbkxAFWmdT7VxxFnBK7IooJqRr4EkRDk970ZE9DBCF8crqe+xlnIFwi6 LYDWz32zdyh8Dgm4Zvn6xT46t1H+BWOth/WbYp0Ka3XCwsF/tKyAco85MM+wBH5yVHyb B/pDHoKSJ7LKdrqQK55d6yEPfK/td640YPkv282SU5B2e0fL3+AaC/+QvCEMZN1+pE/0 KgTI9YuqhFXGu9bxD5l5ppGR7CmU0DWrMnZd/TClpS/1zxcdup6oFYN4vBRNyvVCSp0P 9Jvg== X-Received: by 10.68.255.36 with SMTP id an4mr3265101pbd.154.1380226988456; Thu, 26 Sep 2013 13:23:08 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Thu, 26 Sep 2013 13:22:48 -0700 (PDT) From: Thomas Watteyne Date: Thu, 26 Sep 2013 13:22:48 -0700 X-Google-Sender-Auth: 0jzSY-U-TZPiCS0BNIU0o2QFPS4 Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b5d4b805b42be04e74f238f Subject: [6tsch] Agenda webex 20 September 2013 X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2013 20:23:11 -0000 --047d7b5d4b805b42be04e74f238f Content-Type: text/plain; charset=ISO-8859-1 All, The proposed agenda for the 6TiSCH call is: - Administrivia [4min] - Approval agenda - Approval minutes last call - cut-off dates - update draft architecture [Pascal] - Update minimal draft [Xavi] [15min] - See latest version at https://bitbucket.org/6tsch/draft-vilajosana-6tsch-basic/src - models [Pascal] [15min] - data - information - interaction - discussion model draft [Maria Rita,Pouria,Raghuram,Qin] [25min] - overview Wednesday discussion - open questions (URI, method, triggers, profiles, 6top) - roadmap - AOB [1min] You will find a detailed agenda at https://bitbucket.org/6tsch/meetings/wiki/130927_webex. As usual, feel free to propose any changes to the agenda, also at the beginning of the call. Remember that this call will be recorded. Pascal & Thomas ---- Topic: 6TSCH Weekly Time: 8:00 am, Pacific Daylight Time (San Francisco, GMT-07:00) Meeting Number: 206 802 913 Meeting Password: sixtus ------------------------------------------------------- To start the online meeting ------------------------------------------------------- 1. Go to https://ciscosales.webex.com/ciscosales/j.php?ED=219615007&UID=481905242&PW=NZTRkNDAwOTE1&RT=MiMyMw%3D%3D 2. Log in to your account. 3. Click "Start Now". 4. Follow the instructions that appear on your screen. ---------------------------------------------------------------- ALERT:Toll-Free Dial Restrictions for (408) and (919) Area Codes ---------------------------------------------------------------- The affected toll free numbers are: (866) 432-9903 for the San Jose/Milpitas area and (866) 349-3520 for the RTP area. Please dial the local access number for your area from the list below: - San Jose/Milpitas (408) area: 525-6800 - RTP (919) area: 392-3330 ------------------------------------------------------- To join the teleconference only ------------------------------------------------------- 1. Dial into Cisco WebEx (view all Global Access Numbers at http://cisco.com/en/US/about/doing_business/conferencing/index.html 2. Follow the prompts to enter the Meeting Number (listed above) or Access Code followed by the # sign. San Jose, CA: +1.408.525.6800 RTP: +1.919.392.3330 US/Canada: +1.866.432.9903 United Kingdom: +44.20.8824.0117 India: +91.80.4350.1111 Germany: +49.619.6773.9002 Japan: +81.3.5763.9394 China: +86.10.8515.5666 To check whether you have the appropriate players installed for UCF (Universal Communications Format) rich media files, go to https://ciscosales.webex.com/ciscosales/systemdiagnosis.php http://www.webex.com CCM:+14085256800x206802913 --047d7b5d4b805b42be04e74f238f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    All,

    The proposed agenda for= the 6TiSCH call is:
    • Administrivia [4min]
        • Approval agenda
      • Approval minutes last call
      • cut-off dates
      • update draft architecture [Pascal]
    • Update minimal draft [X= avi] [15min]
    • models [Pascal] [15min]
      • data
      • information
        • <= li>interaction
    • discussion model draft [Maria Rita,Pouria,Raghu= ram,Qin] [25min]
      • overview Wednesday discussion
      • open que= stions (URI, method, triggers, profiles, 6top)
      • roadmap
    • AOB [1min]

    You = will find a detailed agenda at=A0https://bitbucket.org/6tsch/meet= ings/wiki/130927_webex.

    As usual, feel free to propose any changes to the agend= a, also at the beginning of the call.

    Remember tha= t this call will be recorded.

    Pascal & Thomas<= /div>

    ----

    Topic: 6TSCH Weekly
    =
    Time: 8:00 am, Pacific Daylight Time (San Francisco, GMT-07:00)=A0
    Meeting Number: 206 802 913=A0
    Meeting Password: sixtus=A0=

    -------------------------------------------------------= =A0
    To start the online meeting=A0
    --------------------= -----------------------------------=A0
    2. Log in to your account.=A0
    3. Click "Start Now"= .=A0
    4. Follow the instructions that appear on your screen.=A0

    ----------------------------------------------------= ------------=A0
    ALERT:Toll-Free Dial Restrictions for (408) and (919) Area Codes=A0
    ----------------------------------------------------------------=A0=

    The affected toll free numbers are: (866) 432-9903 for the San Jose/M= ilpitas area and (866) 349-3520 for the RTP area.=A0

    Please dial the local access number for your area from = the list below:=A0
    - San Jose/Milpitas (408) area: 525-6800=A0
    - RTP (919) area: 392-3330=A0

    ------------= -------------------------------------------=A0
    To join the teleconference only=A0
    -------------------------= ------------------------------=A0
    1. Dial into Cisco WebEx (view = all Global Access Numbers at=A0
    2. Follow the prompts to enter the Meeting Number (listed above) or Ac= cess Code followed by the # sign.=A0

    San Jose, CA:= +1.408.525.6800 RTP: +1.= 919.392.3330=A0

    US/Canada: +1.86= 6.432.9903 United Kingdom: +44.20.8824.0117=A0


    CCM:+14085256800x206802913=
    --047d7b5d4b805b42be04e74f238f-- From pthubert@cisco.com Fri Sep 27 04:03:49 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D9B3521F93E1 for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 04:03:48 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.096 X-Spam-Level: X-Spam-Status: No, score=-10.096 tagged_above=-999 required=5 tests=[AWL=-0.098, BAYES_00=-2.599, HTML_MESSAGE=0.001, J_CHICKENPOX_46=0.6, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id thbFZD2te+eu for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 04:03:44 -0700 (PDT) Received: from rcdn-iport-1.cisco.com (rcdn-iport-1.cisco.com [173.37.86.72]) by ietfa.amsl.com (Postfix) with ESMTP id B5E7D11E814B for <6tsch@ietf.org>; Fri, 27 Sep 2013 04:03:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=17220; q=dns/txt; s=iport; t=1380279820; x=1381489420; h=from:to:cc:subject:date:message-id:mime-version; bh=EM78v9rTvvNOEpR9N1ifTuferxElEUBEl8tLq1gOpCg=; b=eBS9u/+30DItNGoqgXxBidsjPHpcWxYWHuWM46oWzHaq+GLot9WcJF3L Xv4x71MyS/emAYLOyja75v/JQGIpgalVm9ubfb/Z+Mw1VY9R1Jq6HBrpp QLrbi4kvS8qW6IVszBfZuH/L+raMinXeBKky+/odhPhzmY7YCXoaWMe3k k=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AkYFAANlRVKtJXG9/2dsb2JhbAA/FwOCQ0Q4UsBKgR4WbQeCJwEELRsNERMSARoQCgEDDDwXDQIBAQMODYd+DDarShGNdY4jfS0EEAEHB4MFgQEDmSyQSYJSUoFxOXk X-IronPort-AV: E=Sophos;i="4.90,991,1371081600"; d="scan'208,217";a="265056849" Received: from rcdn-core2-2.cisco.com ([173.37.113.189]) by rcdn-iport-1.cisco.com with ESMTP; 27 Sep 2013 11:03:40 +0000 Received: from xhc-rcd-x08.cisco.com (xhc-rcd-x08.cisco.com [173.37.183.82]) by rcdn-core2-2.cisco.com (8.14.5/8.14.5) with ESMTP id r8RB3d9N032418 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 27 Sep 2013 11:03:39 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-rcd-x08.cisco.com ([173.37.183.82]) with mapi id 14.02.0318.004; Fri, 27 Sep 2013 06:03:39 -0500 From: "Pascal Thubert (pthubert)" To: "6tsch@ietf.org" <6tsch@ietf.org> Thread-Topic: Agenda webex 27 September 2013 Thread-Index: Ac67cRaviZt4icdxRPuS1xvS9GhBSg== Date: Fri, 27 Sep 2013 11:03:39 +0000 Deferred-Delivery: Fri, 27 Sep 2013 11:03:00 +0000 Message-ID: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.61.223.27] Content-Type: multipart/alternative; boundary="_000_E045AECD98228444A58C61C200AE1BD8414A1FD8xmbrcdx01ciscoc_" MIME-Version: 1.0 Cc: "Ted Lemon \(ted.lemon@nominum.com\)" Subject: [6tsch] Agenda webex 27 September 2013 X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2013 11:03:49 -0000 --_000_E045AECD98228444A58C61C200AE1BD8414A1FD8xmbrcdx01ciscoc_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable All, The proposed agenda for the 6TiSCH call is: * Administrivia [4min] * Approval agenda * Approval minutes last call * cut-off dates * update draft architecture [Pascal] * Update minimal draft [Xavi] [15min] * See latest version at https://bitbucket.org/6tsch/draft-vilajosana= -6tsch-basic/src * models [Pascal] [15min] * data * information * interaction * discussion model draft [Maria Rita,Pouria,Raghuram,Qin] [25min] * overview Wednesday discussion * open questions (URI, method, triggers, profiles, 6top) * roadmap * AOB [1min] You will find a detailed agenda at https://bitbucket.org/6tsch/meetings/wik= i/130927_webex. As usual, feel free to propose any changes to the agenda, also at the begin= ning of the call. Remember that this call will be recorded. Pascal & Thomas ---- Topic: 6TSCH Weekly Time: 8:00 am, Pacific Daylight Time (San Francisco, GMT-07:00) Meeting Number: 206 802 913 Meeting Password: sixtus ------------------------------------------------------- To start the online meeting ------------------------------------------------------- 1. Go to https://ciscosales.webex.com/ciscosales/j.php?ED=3D219615007&UID= =3D481905242&PW=3DNZTRkNDAwOTE1&RT=3DMiMyMw%3D%3D 2. Log in to your account. 3. Click "Start Now". 4. Follow the instructions that appear on your screen. ---------------------------------------------------------------- ALERT:Toll-Free Dial Restrictions for (408) and (919) Area Codes ---------------------------------------------------------------- The affected toll free numbers are: (866) 432-9903 for the San Jose/Milpitas area and (866) 349-3520 for the RTP area. Please dial the local access number for your area from the list below: - San Jose/Milpitas (408) area: 525-6800 - RTP (919) area: 392-3330 ------------------------------------------------------- To join the teleconference only ------------------------------------------------------- 1. Dial into Cisco WebEx (view all Global Access Numbers at http://cisco.com/en/US/about/doing_business/conferencing/index.html 2. Follow the prompts to enter the Meeting Number (listed above) or Access = Code followed by the # sign. San Jose, CA: +1.408.525.6800 RTP: +1.919.392.3330 US/Canada: +1.866.432.9903 United Kingdom: +44.20.88= 24.0117 India: +91.80.4350.1111 Germany: +49.619.6773.9002<= tel:%2B49.619.6773.9002> Japan: +81.3.5763.9394 China: +86.10.8515.5666 To check whether you have the appropriate players installed for UCF (Univer= sal Communications Format) rich media files, go to https://ciscosales.webex= .com/ciscosales/systemdiagnosis.php http://www.webex.com CCM:+14085256800x206802913 --_000_E045AECD98228444A58C61C200AE1BD8414A1FD8xmbrcdx01ciscoc_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

    <resending to fix t= he date in the title>

    All,

     

    The proposed agenda for the 6TiSCH call is:

    • Administrivia [4min]
      • Approval agenda
      • Approval minutes last call
      • cut-off dates
      • update draft architecture [Pascal]
    • Update minimal draft [Xavi] [15min]
    • models [Pascal] [15min]
      • data
      • information
      • interaction
    • discussion model draft [Maria Rita,Pouria,Raghuram,Qin] [25min]<= /li>
      • overview Wednesday discussion
      • open questions (URI, method, triggers, profiles, 6top)
      • roadmap
    • AOB [1min]

     

    You will find a detailed agenda at ht= tps://bitbucket.org/6tsch/meetings/wiki/130927_webex.

     

    As usual, feel free to propose any changes to the ag= enda, also at the beginning of the call.

     

    Remember that this call will be recorded.=

     

    Pascal & Thomas

     

    ----

     

    Topic: 6TSCH Weekly

    Time: 8:00 am, Pacific Daylight Time (San Francisco,= GMT-07:00) 

    Meeting Number: 206 802 913 

    Meeting Password: sixtus 

     

    ----------------------------------------------------= --- 

    To start the online meeting 

    ----------------------------------------------------= --- 

    2. Log in to your account. 

    3. Click "Start Now". 

    4. Follow the instructions that appear on your scree= n. 

     

    ----------------------------------------------------= ------------ 

    ALERT:Toll-Free Dial Restrictions for (408) and (919= ) Area Codes 

    ----------------------------------------------------= ------------ 

     

    The affected toll free numbers are: (866) 432-9903 for the San Jose/Milpitas area and (866) 349-3520 for the RTP area. 

     

    Please dial the local access number for your area fr= om the list below: 

    - San Jose/Milpitas (408) area: 525-6800 <= /o:p>

    - RTP (919) area: 392-3330 

     

    ----------------------------------------------------= --- 

    To join the teleconference only 

    ----------------------------------------------------= --- 

    1. Dial into Cisco WebEx (view all Global Access Num= bers at 

    2. Follow the prompts to enter the Meeting Number (l= isted above) or Access Code followed by the # sign. 

     

    San Jose, CA: +1.408.525.6800 RTP: +1.919.392.3330 

     

    US/Canada: +1.866.432.9903 United Kingdom: +44.20.8824.0117 

     

     

     

     

     

    CCM:+14085256800x206802913

    --_000_E045AECD98228444A58C61C200AE1BD8414A1FD8xmbrcdx01ciscoc_-- From qinwang@berkeley.edu Fri Sep 27 10:31:05 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E1D8511E80E9 for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 10:31:05 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.614 X-Spam-Level: X-Spam-Status: No, score=-2.614 tagged_above=-999 required=5 tests=[AWL=0.362, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bd8EF0ZImO70 for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 10:31:00 -0700 (PDT) Received: from mail-ie0-f181.google.com (mail-ie0-f181.google.com [209.85.223.181]) by ietfa.amsl.com (Postfix) with ESMTP id 9615521F944C for <6tsch@ietf.org>; Fri, 27 Sep 2013 10:31:00 -0700 (PDT) Received: by mail-ie0-f181.google.com with SMTP id tp5so4606521ieb.40 for <6tsch@ietf.org>; Fri, 27 Sep 2013 10:31:00 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to :content-type; bh=0yGkRFb/QzV2I/IR721HyV6BzFp0luDPtCeg9sx0ugg=; b=U6o6Y50jSJ7wxz/mHyP4uC5PJ6cWnkTnkdcx1lGGl1WLz0QLSIZ2ghbpdzkS6hgXQp BfnT1Q3M7hActknSkzErwOjxqaJkAgBUUowkjPBRtqxDC6jSztu7UqZOmHtFIK6Rhl43 Jgh3gHhm47TeZmbUKVzbh1gTaLpweiOQq67k1j6qGnHxmrng8XbtJHb7qjk7Lz9R96Dv L1wn5njPccVQvMQz0A/pqc23sRh2vKiyT2FTO/XkZQiNeSWUKwL11bplZB9aioGY5etR Q1sQoCN1OZJxrdanblwrfRcjlJ8BqIHiP/LayTkiU69oQEOKH5+nGnZVMhBb+MxVyGU/ aaxQ== X-Gm-Message-State: ALoCoQnu4GDq2UX2zW7gLJKUtPQpUSuu1DKKZVhQ30X7mHtf7oyWOyW8I+1oyqdNdfpN0ejboUuo MIME-Version: 1.0 X-Received: by 10.43.48.7 with SMTP id uu7mr1405088icb.68.1380303059872; Fri, 27 Sep 2013 10:30:59 -0700 (PDT) Received: by 10.64.130.234 with HTTP; Fri, 27 Sep 2013 10:30:59 -0700 (PDT) Date: Sat, 28 Sep 2013 01:30:59 +0800 Message-ID: From: Qin Wang To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=bcaec529a09d9117a504e760d9e1 Subject: [6tsch] set DAGRank to Join Priority X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2013 17:31:06 -0000 --bcaec529a09d9117a504e760d9e1 Content-Type: text/plain; charset=ISO-8859-1 Hi Thomas, I think with OF0 the DAGRank is uint8. But, in the Table 52b of IEEE802.15.4e, the range of Join Priority is 0x00~0x3f. If the range is a "MUST", we have to have a function mapping a DAGRank in 0x00~0xff to a JoinPriority in 0x00~0x3f. Correct? Would you please confirm with some expertise in IEEE802.15.4e if the range 0x00~0x3f is a MUST or not? Thanks Qin --bcaec529a09d9117a504e760d9e1 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Hi Thomas,

    I think with OF0 the DAGRank= is uint8. But, in the Table 52b of IEEE802.15.4e, the range of Join Priori= ty is 0x00~0x3f. If the range is a "MUST", we have to have a func= tion mapping a DAGRank in 0x00~0xff to a JoinPriority in 0x00~0x3f. Correct= ?

    Would you please confirm with some expertise in IEEE802= .15.4e if the range 0x00~0x3f is a MUST or not?

    Th= anks
    Qin
    --bcaec529a09d9117a504e760d9e1-- From pthubert@cisco.com Fri Sep 27 10:52:34 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 262B711E8109 for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 10:52:34 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -9.875 X-Spam-Level: X-Spam-Status: No, score=-9.875 tagged_above=-999 required=5 tests=[AWL=0.723, BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id l4bPktCpZLLI for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 10:52:29 -0700 (PDT) Received: from rcdn-iport-8.cisco.com (rcdn-iport-8.cisco.com [173.37.86.79]) by ietfa.amsl.com (Postfix) with ESMTP id BEC8B11E814D for <6tsch@ietf.org>; Fri, 27 Sep 2013 10:52:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=4824; q=dns/txt; s=iport; t=1380304345; x=1381513945; h=from:to:subject:date:message-id:references:in-reply-to: mime-version; bh=7/DJL+fvVay09NgZFsZ4OIS9lUIpuM8dUioLMaNawM0=; b=GPEcgAY/vlIQ8rzEQ6a5X63DJfMMNZqy9QO8T6kVQCK/TOmUNJovUgok rDzE9vjcBcdm/N8Ta1olRguO2Nb/DbMaONlLSI/c4WDS4cJ5jIVWZdpkw 3toLMR2tFHPYE2jX3eK5sBD9tW8+AFz6CdOjXSgNw+letfuxbxr7KxU8x g=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AlkFAN/ERVKtJV2c/2dsb2JhbABbgwc4wR6BHRZtB4ImAQEEAQEBaxsCAQwMBCsHJwsUBwoCBBOIBgy5VgSPQA0KAYMfgQEDiQGOfpF4gWaBPg X-IronPort-AV: E=Sophos;i="4.90,994,1371081600"; d="scan'208,217";a="265420581" Received: from rcdn-core-5.cisco.com ([173.37.93.156]) by rcdn-iport-8.cisco.com with ESMTP; 27 Sep 2013 17:52:24 +0000 Received: from xhc-aln-x10.cisco.com (xhc-aln-x10.cisco.com [173.36.12.84]) by rcdn-core-5.cisco.com (8.14.5/8.14.5) with ESMTP id r8RHqO5u002405 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for <6tsch@ietf.org>; Fri, 27 Sep 2013 17:52:24 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-aln-x10.cisco.com ([173.36.12.84]) with mapi id 14.02.0318.004; Fri, 27 Sep 2013 12:52:23 -0500 From: "Pascal Thubert (pthubert)" To: "6tsch@ietf.org" <6tsch@ietf.org> Thread-Topic: [6lo] [coman] WG Review: IPv6 over Networks of Resource-constrained Nodes (6lo) Thread-Index: AQHOu6k7ZxoIg5S//USFyB517EEKJZnZ3VE1 Date: Fri, 27 Sep 2013 17:52:22 +0000 Message-ID: <6A45D6E7-F5FF-4464-896E-879665FF3842@cisco.com> References: <20130923180202.32168.94377.idtracker@ietfa.amsl.com> <9904FB1B0159DA42B0B887B7FA8119CA128E75E5@AZ-FFEXMB04.global.avaya.com> <52419692.7050903@cisco.com> <20130924134921.GA19673@elstar.local> <52419C92.9040807@cisco.com> <20130926132817.GB25326@elstar.local> <9904FB1B0159DA42B0B887B7FA8119CA128E9913@AZ-FFEXMB04.global.avaya.com> <20130926215221.GA26059@elstar.local> <20130926221814.GE26059@elstar.local> <9DD59AEB-EF1B-47B2-B81C-00E38F1534F3@tzi.org>, <5245C405.1070808@acm.org> In-Reply-To: <5245C405.1070808@acm.org> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: multipart/alternative; boundary="_000_6A45D6E7F5FF4464896E879665FF3842ciscocom_" MIME-Version: 1.0 Subject: [6tsch] Fwd: [6lo] [coman] WG Review: IPv6 over Networks of Resource-constrained Nodes (6lo) X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2013 17:52:34 -0000 X-List-Received-Date: Fri, 27 Sep 2013 17:52:34 -0000 --_000_6A45D6E7F5FF4464896E879665FF3842ciscocom_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Exp=E9diteur: Erik Nordmark > Date: 27 septembre 2013 19:44:37 UTC+2 Destinataire: Carsten Bormann > Cc: >, Juergen Schoenwaelder >= , The IESG >, 6lo WG <6lo@ietf.org> Objet: R=E9p : [6lo] [coman] WG Review: IPv6 over Networks of Resource-cons= trained Nodes (6lo) On 9/26/13 11:58 PM, Carsten Bormann wrote: OLD: 2. Related MIB modules Hmm: 2. Related interfaces for management applications (e.g., MIB modules) NEW: 2. Related MIB modules (including, where applicable, management data models= using other established IETF management data modeling schemes). Carsten, *If* the WG and the IESG want the broader scope, then I'd suggest explicitl= y mentioning Yang models instead of the "other established ..." wording. A = key question would be whether such models would cover config and operationa= l data. A more radical approach would be to (gasp!), only do Yang even for operatio= nal data. It is easy to map Yang to a RESTful API (see draft-bierman-netcon= f-yang-api) which might fit nicely with CoAP. But not doing SMIv2 models might be too radical? Erik _______________________________________________ 6lo mailing list 6lo@ietf.org https://www.ietf.org/mailman/listinfo/6lo --_000_6A45D6E7F5FF4464896E879665FF3842ciscocom_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

    Exp=E9diteur: Erik Nordmark <nordmark@acm.org>
    Date: 27 septembre 2013 19:44:37 UTC+2
    Destinataire: Carsten Bormann <ca= bo@tzi.org>
    Cc: <coman@ietf.org>, Ju= ergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>, The IESG <iesg@ietf.org>, 6lo WG <6lo@ietf.org>
    Objet: R=E9p : [6lo] [coman] WG Review: IPv6 over Networks o= f Resource-constrained Nodes (6lo)

    On 9/26/13 11:58 PM, Carsten Bormann wrote:

    OLD:
    2. Related MIB modules

    Hmm:
    2. Related interfaces for management applic= ations (e.g., MIB modules)

    NEW:
    2. Related MIB modules (including, where ap= plicable, management data models using other established IETF management da= ta modeling schemes).

    Carsten,

    *If* the WG and the IESG want the broader scope, then I'd suggest exp= licitly mentioning Yang models instead of the "other established ...&q= uot; wording. A key question would be whether such models would cover confi= g and operational data.

    A more radical approach would be to (gasp!), only do Yang even for op= erational data. It is easy to map Yang to a RESTful API (see draft-bierman-= netconf-yang-api) which might fit nicely with CoAP.
    But not doing SMIv2 models might be too radical?

      Erik

    _______________________________________________
    6lo mailing list
    6lo@ietf.org
    https://www.iet= f.org/mailman/listinfo/6lo
    --_000_6A45D6E7F5FF4464896E879665FF3842ciscocom_-- From xvilajosana@berkeley.edu Fri Sep 27 11:30:28 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 435D421F9FC3 for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 11:30:28 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.916 X-Spam-Level: X-Spam-Status: No, score=-1.916 tagged_above=-999 required=5 tests=[AWL=0.060, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id NSXU7wzSbIya for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 11:30:24 -0700 (PDT) Received: from mail-pd0-f177.google.com (mail-pd0-f177.google.com [209.85.192.177]) by ietfa.amsl.com (Postfix) with ESMTP id 3075721F9CF3 for <6tsch@ietf.org>; Fri, 27 Sep 2013 11:30:23 -0700 (PDT) Received: by mail-pd0-f177.google.com with SMTP id y10so2931841pdj.36 for <6tsch@ietf.org>; Fri, 27 Sep 2013 11:30:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=uRE9RKdIEHgwHVIG5UN9TS/4q/nYPM53aDX7b2ncJJ4=; b=fzGtaqDLSybQrheQH++o8T7irx6MMXZ7665ZT7+o4d4ObQbycHL1Lmo9DF6t/lpJBs dTq2FapHTk3tYrJQI1jeMTHL+erXAoItuFUM0oB8upWQexN8WA5Vsb/bEYht0XMAV0q8 s4lnEyqcentYca2/SHftEbKJQ+44UV9i8d7on3dgg/Qmsn5WuAf7FEtVi4GCXQSrlGYG vYK7vB7Tt8DGSP2KW5BlHZ6sXOlgalvtq9Gg6KlAFKyGk5L6GEYSx9zISdzHAbd1hb/2 hDZ3Q62tXPnppO6mTe8oZfnucH+Rbzm9jKc95sB/2Aai4laE+ihHv3ZevrelnXZn5g39 P1Pw== X-Gm-Message-State: ALoCoQk01i7oSwZ49BB5NHQOcwcOLZYGI+u10wWNT7D31jUSMowdUax46SM3THSaUwIU70pUTULx MIME-Version: 1.0 X-Received: by 10.68.192.195 with SMTP id hi3mr9034767pbc.18.1380306623488; Fri, 27 Sep 2013 11:30:23 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Fri, 27 Sep 2013 11:30:23 -0700 (PDT) In-Reply-To: References: Date: Fri, 27 Sep 2013 11:30:23 -0700 Message-ID: From: Xavier Vilajosana Guillen To: Qin Wang Content-Type: multipart/alternative; boundary=047d7ba970e6f9711f04e761ade6 Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] set DAGRank to Join Priority X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2013 18:30:28 -0000 --047d7ba970e6f9711f04e761ade6 Content-Type: text/plain; charset=ISO-8859-1 Hi Qin, after thinking a little bit on that maybe we can use the higher byte of the rank for that. that is rank>>8, the higher byte is a monotonically increasing counter. As each hop is <<8 (due to minhopRankIncrease) we can have the sense of higher join priority as higher the rank. In addition having if we have the limitation of 0x3F, this means that we will support Join priorities up to 0x3F that translated to ranks are 0x3F<<8 (big number) .. just thoughts... X On Fri, Sep 27, 2013 at 10:30 AM, Qin Wang wrote: > Hi Thomas, > > I think with OF0 the DAGRank is uint8. But, in the Table 52b of > IEEE802.15.4e, the range of Join Priority is 0x00~0x3f. If the range is a > "MUST", we have to have a function mapping a DAGRank in 0x00~0xff to a > JoinPriority in 0x00~0x3f. Correct? > > Would you please confirm with some expertise in IEEE802.15.4e if the range > 0x00~0x3f is a MUST or not? > > Thanks > Qin > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --047d7ba970e6f9711f04e761ade6 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Hi Qin,

    after thinking a little bit on that ma= ybe we can use the higher byte of the rank for that. that is=A0 rank>>= ;8, the higher byte is a monotonically increasing counter. As each hop is &= lt;<8 (due to minhopRankIncrease) we can have the sense of higher join p= riority as higher the rank.

    In addition having if we have the limitation of 0x3F, this means that w= e will support Join priorities up to 0x3F that translated to ranks are 0x3F= <<8 (big number) ..

    just thoughts...
    X


    On Fri, Sep 27, 2013 at 10:30 AM, Qin Wa= ng <qinwang@berkeley.edu> wrote:
    Hi Thomas,

    I think with OF0 the DAGRank= is uint8. But, in the Table 52b of IEEE802.15.4e, the range of Join Priori= ty is 0x00~0x3f. If the range is a "MUST", we have to have a func= tion mapping a DAGRank in 0x00~0xff to a JoinPriority in 0x00~0x3f. Correct= ?

    Would you please confirm with some expertise in IEEE802= .15.4e if the range 0x00~0x3f is a MUST or not?

    Th= anks
    Qin

    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch


    --047d7ba970e6f9711f04e761ade6-- From qinwang@berkeley.edu Fri Sep 27 13:44:39 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2250D21F9BC1 for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 13:44:39 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.64 X-Spam-Level: X-Spam-Status: No, score=-2.64 tagged_above=-999 required=5 tests=[AWL=0.336, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ajte29uM8ClO for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 13:44:35 -0700 (PDT) Received: from mail-ie0-f178.google.com (mail-ie0-f178.google.com [209.85.223.178]) by ietfa.amsl.com (Postfix) with ESMTP id 4D64621F9B21 for <6tsch@ietf.org>; Fri, 27 Sep 2013 13:44:25 -0700 (PDT) Received: by mail-ie0-f178.google.com with SMTP id to1so5038800ieb.23 for <6tsch@ietf.org>; Fri, 27 Sep 2013 13:44:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=C8pJi7niYVk/+D9miofz2tyRVqsFtPb71L7UyevxnxI=; b=mZMbtgadCQ17gTQv2npW41z5J+4zjimuHqG7rJF45DPRTVNzrh+JnA3aKm7pn+TP// ZbNweMoJWp2Qm7pSQtC7m/L0vj9eh+/iQQapXwvRdik9fQD7Bqc4saKQu5AexW78fag3 Vt4N5xOOkoPhYTIZhRyi78zfB7pRaawkKyCMmFjZnE83+jD1X1qhejRukVn/Klou6gVV kekX0IYChcn9AiQw/eAE/hJ876fJkvfA59IPuVCyb+xZ3h7H/KXa1ki3hHd/+Qzxjjk1 /4qqiBIyB/KzMgcGPiXYca9z9hi8hEYd5KwpMj77/RsvfJvq2gT5UhaogZwQB1jx6GWX sYPg== X-Gm-Message-State: ALoCoQlwM6Gv2KSG9ZKvjxoihib6NOQTkpp4nTSVaeU1VML+e8iNiFrG+gVuyu3w0tTU+kUXwo6n MIME-Version: 1.0 X-Received: by 10.50.60.5 with SMTP id d5mr3993523igr.26.1380314663695; Fri, 27 Sep 2013 13:44:23 -0700 (PDT) Received: by 10.64.130.234 with HTTP; Fri, 27 Sep 2013 13:44:23 -0700 (PDT) In-Reply-To: References: Date: Sat, 28 Sep 2013 04:44:23 +0800 Message-ID: From: Qin Wang To: Xavier Vilajosana Guillen Content-Type: multipart/alternative; boundary=047d7b10c77f35424c04e7638d65 Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] set DAGRank to Join Priority X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2013 20:44:39 -0000 --047d7b10c77f35424c04e7638d65 Content-Type: text/plain; charset=ISO-8859-1 Xavi, Let's take the example in your draft to see what the problem is. Please point out if I'm wrong. +-------+ | 0 | R(0)=0 | | DAGRank(R(0)) = 0 +-------+ | | +-------+ | 1 | R(1)=R(0)+683=683 | | DAGRank(R(1)) = 2 +-------+ | | +-------+ | 2 | R(2)=R(1)+683=1366 | | DAGRank(R(2)) = 5 +-------+ | | +-------+ | 3 | R(3)=R(2)+683=2049 | | DAGRank(R(3)) = 8 +-------+ | | +-------+ | 4 | R(4)=R(3)+683=2732 | | DAGRank(R(4)) = 10 +-------+ | | +-------+ | 5 | R(5)=R(4)+683=3415 | | DAGRank(R(5)) = 13 +-------+ >From the example, you can see R(n) is a 2-byte integer, and DAGRank is always the higher byte of the 2byte integer, because minHopRankIncrease = 256. If set JoinPriority = DAGRank, then it is possible JoinPriority> 0x3f (although it unlikely happens often), out of its range. If set JoinPriority[5:0] = DAGRank[7:2], (Is it your suggestion?), a new node may found many existing nodes with same JoinPriority in received EB. In another word, the JoinPriority can not provide information about preferring joining. Right? I haven't had good solution for it. So, I hope the range 0x00~0x3f is not a "MUST" in IEEE802.15.4e. What do you think? Qin On Sat, Sep 28, 2013 at 2:30 AM, Xavier Vilajosana Guillen < xvilajosana@eecs.berkeley.edu> wrote: > Hi Qin, > > after thinking a little bit on that maybe we can use the higher byte of > the rank for that. that is rank>>8, the higher byte is a monotonically > increasing counter. As each hop is <<8 (due to minhopRankIncrease) we can > have the sense of higher join priority as higher the rank. > > In addition having if we have the limitation of 0x3F, this means that we > will support Join priorities up to 0x3F that translated to ranks are > 0x3F<<8 (big number) .. > > just thoughts... > X > > > On Fri, Sep 27, 2013 at 10:30 AM, Qin Wang wrote: > >> Hi Thomas, >> >> I think with OF0 the DAGRank is uint8. But, in the Table 52b of >> IEEE802.15.4e, the range of Join Priority is 0x00~0x3f. If the range is a >> "MUST", we have to have a function mapping a DAGRank in 0x00~0xff to a >> JoinPriority in 0x00~0x3f. Correct? >> >> Would you please confirm with some expertise in IEEE802.15.4e if the >> range 0x00~0x3f is a MUST or not? >> >> Thanks >> Qin >> >> _______________________________________________ >> 6tsch mailing list >> 6tsch@ietf.org >> https://www.ietf.org/mailman/listinfo/6tsch >> >> > --047d7b10c77f35424c04e7638d65 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Xavi,

    Let's take the example in you= r draft to see what the problem is. Please point out if I'm wrong.
    +-------+
    =A0 =A0 =A0| =A0 0 =A0 | R(0)=3D0
    = =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(0)) =3D 0
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 = =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 1 = =A0 | R(1)=3DR(0)+683=3D683
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(= 1)) =3D 2
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 = =A0| =A0 2 =A0 | R(2)=3DR(1)+683=3D1366
    =A0 =A0 =A0| =A0 =A0 =A0 = | DAGRank(R(2)) =3D 5
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 = =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 3 =A0 | R(3)=3DR(2)+683=3D2049
    =A0 =A0 =A0|= =A0 =A0 =A0 | DAGRank(R(3)) =3D 8
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+= -------+
    =A0 =A0 =A0| =A0 4 =A0 | R(4)=3DR(3)+683=3D2732
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(4)) =3D 10
    =A0 =A0 =A0+= -------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 5 =A0 | R(5)=3DR(4)+6= 83=3D3415
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(5)) =3D 13
    =A0 =A0 =A0+-------+

    From the example, = you can see R(n) is a 2-byte integer, and DAGRank is always the higher byte= of the 2byte integer, because=A0minHopRankIncrease =3D 256.

    =
    If set JoinPriority =3D DAGRank, then it is possible JoinPriority> = 0x3f (although it unlikely happens often), out of its range.=A0
    I= f set JoinPriority[5:0] =3D DAGRank[7:2], (Is it your suggestion?), a new n= ode may found many existing nodes with same JoinPriority in received EB. In= another word, the JoinPriority can not provide information about preferrin= g joining. Right?

    I haven't had good solution for it. So, I hope the = range 0x00~0x3f is not a "MUST" in IEEE802.15.4e.

    <= /div>
    What =A0do you think?
    Qin=A0

    <= br>


    O= n Sat, Sep 28, 2013 at 2:30 AM, Xavier Vilajosana Guillen <xvi= lajosana@eecs.berkeley.edu> wrote:
    Hi Qin,

    after t= hinking a little bit on that maybe we can use the higher byte of the rank f= or that. that is=A0 rank>>8, the higher byte is a monotonically incre= asing counter. As each hop is <<8 (due to minhopRankIncrease) we can = have the sense of higher join priority as higher the rank.

    In addition having if we have the limitation of 0x3F, this means that w= e will support Join priorities up to 0x3F that translated to ranks are 0x3F= <<8 (big number) ..

    just thoughts...
    X


    On Fri, Sep 27, 2= 013 at 10:30 AM, Qin Wang <qinwang@berkeley.edu> wrote:
    Hi Thomas,

    I think with OF0 the DAGRank= is uint8. But, in the Table 52b of IEEE802.15.4e, the range of Join Priori= ty is 0x00~0x3f. If the range is a "MUST", we have to have a func= tion mapping a DAGRank in 0x00~0xff to a JoinPriority in 0x00~0x3f. Correct= ?

    Would you please confirm with some expertise in IEEE802= .15.4e if the range 0x00~0x3f is a MUST or not?

    Th= anks
    Qin

    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch



    --047d7b10c77f35424c04e7638d65-- From xvilajosana@berkeley.edu Fri Sep 27 14:07:22 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A58C121F9EAF for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 14:07:22 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.926 X-Spam-Level: X-Spam-Status: No, score=-1.926 tagged_above=-999 required=5 tests=[AWL=0.050, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id h-3-FSbWXNfv for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 14:07:15 -0700 (PDT) Received: from mail-pd0-f176.google.com (mail-pd0-f176.google.com [209.85.192.176]) by ietfa.amsl.com (Postfix) with ESMTP id 65D4921F9E91 for <6tsch@ietf.org>; Fri, 27 Sep 2013 14:07:11 -0700 (PDT) Received: by mail-pd0-f176.google.com with SMTP id q10so3089536pdj.21 for <6tsch@ietf.org>; Fri, 27 Sep 2013 14:07:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=HqmmzCaBXSnS/Swri5gWuRAV4HZpl3GqTEm5ReZY4Ng=; b=iGdNuzntapHUgRiKqkEhz8ZgBpDz0iuzO3+23oz0A0WP/0Vv4kuX7RT/X1EoWHEbq8 c6RmeylTOIWp9QtGt95gmd0JuLSLCeth77CKOeZc3H8jTskBu2yT5/ko34QzMYhaO8qD 8jqQDdUn3hp5u19tAezB4+9YzAc8BOpjA1PaePntaOm0oAx7wiZ1vdzv0z4KoZ+XZFAI 2C85DPheWm386IprezFG+H9hVI19tsQ9A8mYU7L+RX90vslru13oKiMSdcPugdx6mTGM 5J9Vado/upsWo/o+vo/3hxnLyX0zRiu1GXw62HoYO7J+bGt2cSJbXF26X7ibul1zexe6 B7nA== X-Gm-Message-State: ALoCoQmuQayM+C9Pep/Jx0kvoeSObK/mytqq8PLUvy0ETfhN3SXr3RoV4DuYwKyc7uf+GdCotE9w MIME-Version: 1.0 X-Received: by 10.68.236.103 with SMTP id ut7mr9719911pbc.118.1380316024826; Fri, 27 Sep 2013 14:07:04 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Fri, 27 Sep 2013 14:07:04 -0700 (PDT) In-Reply-To: References: Date: Fri, 27 Sep 2013 14:07:04 -0700 Message-ID: From: Xavier Vilajosana Guillen To: Qin Wang Content-Type: multipart/alternative; boundary=047d7b33daa85678a004e763dea0 Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] set DAGRank to Join Priority X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2013 21:07:22 -0000 --047d7b33daa85678a004e763dea0 Content-Type: text/plain; charset=ISO-8859-1 Hi Qin, my suggestion is to use JoinPriority[5:0] = (rank[15:8]&0x3F) or 0x3F if bigger -- having a 0x3F would be like having INFINITE Join Priority as in the case of RPL with ranks>65535. would that not work? X On Fri, Sep 27, 2013 at 1:44 PM, Qin Wang wrote: > Xavi, > > Let's take the example in your draft to see what the problem is. Please > point out if I'm wrong. > +-------+ > | 0 | R(0)=0 > | | DAGRank(R(0)) = 0 > +-------+ > | > | > +-------+ > | 1 | R(1)=R(0)+683=683 > | | DAGRank(R(1)) = 2 > +-------+ > | > | > +-------+ > | 2 | R(2)=R(1)+683=1366 > | | DAGRank(R(2)) = 5 > +-------+ > | > | > +-------+ > | 3 | R(3)=R(2)+683=2049 > | | DAGRank(R(3)) = 8 > +-------+ > | > | > +-------+ > | 4 | R(4)=R(3)+683=2732 > | | DAGRank(R(4)) = 10 > +-------+ > | > | > +-------+ > | 5 | R(5)=R(4)+683=3415 > | | DAGRank(R(5)) = 13 > +-------+ > > From the example, you can see R(n) is a 2-byte integer, and DAGRank is > always the higher byte of the 2byte integer, because minHopRankIncrease = > 256. > > If set JoinPriority = DAGRank, then it is possible JoinPriority> 0x3f > (although it unlikely happens often), out of its range. > If set JoinPriority[5:0] = DAGRank[7:2], (Is it your suggestion?), a new > node may found many existing nodes with same JoinPriority in received EB. > In another word, the JoinPriority can not provide information about > preferring joining. Right? > > I haven't had good solution for it. So, I hope the range 0x00~0x3f is not > a "MUST" in IEEE802.15.4e. > > What do you think? > Qin > > > > > On Sat, Sep 28, 2013 at 2:30 AM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote: > >> Hi Qin, >> >> after thinking a little bit on that maybe we can use the higher byte of >> the rank for that. that is rank>>8, the higher byte is a monotonically >> increasing counter. As each hop is <<8 (due to minhopRankIncrease) we can >> have the sense of higher join priority as higher the rank. >> >> In addition having if we have the limitation of 0x3F, this means that we >> will support Join priorities up to 0x3F that translated to ranks are >> 0x3F<<8 (big number) .. >> >> just thoughts... >> X >> >> >> On Fri, Sep 27, 2013 at 10:30 AM, Qin Wang wrote: >> >>> Hi Thomas, >>> >>> I think with OF0 the DAGRank is uint8. But, in the Table 52b of >>> IEEE802.15.4e, the range of Join Priority is 0x00~0x3f. If the range is a >>> "MUST", we have to have a function mapping a DAGRank in 0x00~0xff to a >>> JoinPriority in 0x00~0x3f. Correct? >>> >>> Would you please confirm with some expertise in IEEE802.15.4e if the >>> range 0x00~0x3f is a MUST or not? >>> >>> Thanks >>> Qin >>> >>> _______________________________________________ >>> 6tsch mailing list >>> 6tsch@ietf.org >>> https://www.ietf.org/mailman/listinfo/6tsch >>> >>> >> > --047d7b33daa85678a004e763dea0 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Hi Qin,=A0

    my suggestion is to use=A0JoinPriority[5:0]= =3D (rank[15:8]&0x3F) or 0x3F if bigger -- having a 0x3F would be like= having INFINITE Join Priority as in the case of RPL with ranks>65535.

    wou= ld that not work?
    X

    On Fri, Sep 27, 2013 at 1:44 PM, Qin Wang <qinwang@berkeley.edu>= wrote:
    Xavi,

    Let's take the example in you= r draft to see what the problem is. Please point out if I'm wrong.
    +-------+
    =A0 =A0 =A0| =A0 0 =A0 | R(0)=3D0
    = =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(0)) =3D 0
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 = =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 1 = =A0 | R(1)=3DR(0)+683=3D683
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(= 1)) =3D 2
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 = =A0| =A0 2 =A0 | R(2)=3DR(1)+683=3D1366
    =A0 =A0 =A0| =A0 =A0 =A0 = | DAGRank(R(2)) =3D 5
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 = =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 3 =A0 | R(3)=3DR(2)+683=3D2049
    =A0 =A0 =A0|= =A0 =A0 =A0 | DAGRank(R(3)) =3D 8
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+= -------+
    =A0 =A0 =A0| =A0 4 =A0 | R(4)=3DR(3)+683=3D2732
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(4)) =3D 10
    =A0 =A0 =A0+= -------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 5 =A0 | R(5)=3DR(4)+6= 83=3D3415
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(5)) =3D 13
    =A0 =A0 =A0+-------+

    From the example, = you can see R(n) is a 2-byte integer, and DAGRank is always the higher byte= of the 2byte integer, because=A0minHopRankIncrease =3D 256.

    =
    If set JoinPriority =3D DAGRank, then it is possible JoinPriority> = 0x3f (although it unlikely happens often), out of its range.=A0
    I= f set JoinPriority[5:0] =3D DAGRank[7:2], (Is it your suggestion?), a new n= ode may found many existing nodes with same JoinPriority in received EB. In= another word, the JoinPriority can not provide information about preferrin= g joining. Right?

    I haven't had good solution for it. So, I hope the = range 0x00~0x3f is not a "MUST" in IEEE802.15.4e.

    <= /div>
    What =A0do you think?
    Qin=A0




    On Sat, Sep 28, 2013 a= t 2:30 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkele= y.edu> wrote:
    Hi Qin,

    after t= hinking a little bit on that maybe we can use the higher byte of the rank f= or that. that is=A0 rank>>8, the higher byte is a monotonically incre= asing counter. As each hop is <<8 (due to minhopRankIncrease) we can = have the sense of higher join priority as higher the rank.

    In addition having if we have the limitation of 0x3F, this means that w= e will support Join priorities up to 0x3F that translated to ranks are 0x3F= <<8 (big number) ..

    just thoughts...
    X


    On Fri, Sep 27, 2013 at 10:30 = AM, Qin Wang <qinwang@berkeley.edu> wrote:
    Hi Thomas,

    I think with OF0 the DAGRank= is uint8. But, in the Table 52b of IEEE802.15.4e, the range of Join Priori= ty is 0x00~0x3f. If the range is a "MUST", we have to have a func= tion mapping a DAGRank in 0x00~0xff to a JoinPriority in 0x00~0x3f. Correct= ?

    Would you please confirm with some expertise in IEEE802= .15.4e if the range 0x00~0x3f is a MUST or not?

    Th= anks
    Qin

    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch




    --047d7b33daa85678a004e763dea0-- From qinwang@berkeley.edu Fri Sep 27 14:20:30 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B7CF811E80DE for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 14:20:29 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.662 X-Spam-Level: X-Spam-Status: No, score=-2.662 tagged_above=-999 required=5 tests=[AWL=0.314, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ez+VBIr7oZ2o for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 14:20:25 -0700 (PDT) Received: from mail-ie0-f178.google.com (mail-ie0-f178.google.com [209.85.223.178]) by ietfa.amsl.com (Postfix) with ESMTP id DBBF521F9F88 for <6tsch@ietf.org>; Fri, 27 Sep 2013 14:20:20 -0700 (PDT) Received: by mail-ie0-f178.google.com with SMTP id to1so5345982ieb.9 for <6tsch@ietf.org>; Fri, 27 Sep 2013 14:20:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=9cTDtzKYYpPVBzqlYviZ+sfUAXOwS9tji6N19Hhh6j0=; b=G+W6XuJWsxIeVMi6Lpq1pJUsqB4YWEUP92iqBTL3VI1XnvKhNiOE4jKjfj+O0aCpMN C9yxobG8x/IZ8Ywbr7nxb37aEuN/LTt1lljB5y+HCQDgk91y6glxY/pVQSagQfR5I8z7 aDMG+XHF2jtcH0n+1Qvy9xltolEXClLBIJpL0WTPPHNe7QV8rUQAc2hdkMlBoXP5PpGA gIPk8K1iR+5+mZOm7IeoyVKNTF5CrFysbSlvt1q/A9tV9smu5/lmF0KB2qT7h8t1Jou4 P0MJq8/0wX2o+9UQIIWXx3eh4CxlKo0bkiEP0xjH5spUNfBGLUkMX9sKM8yinbxh+2kb IkZQ== X-Gm-Message-State: ALoCoQnvEJYeUsnTAHsoVkAdybW6Nj9Frp95Pfk3jf7wqpSkvx/09CqrG3ViX7A/8mVgZ4WZx28g MIME-Version: 1.0 X-Received: by 10.42.86.73 with SMTP id t9mr47749icl.81.1380316818294; Fri, 27 Sep 2013 14:20:18 -0700 (PDT) Received: by 10.64.130.234 with HTTP; Fri, 27 Sep 2013 14:20:18 -0700 (PDT) In-Reply-To: References: Date: Sat, 28 Sep 2013 05:20:18 +0800 Message-ID: From: Qin Wang To: Xavier Vilajosana Guillen Content-Type: multipart/alternative; boundary=90e6ba613d88a1ed1704e7640d4b Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] set DAGRank to Join Priority X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2013 21:20:30 -0000 --90e6ba613d88a1ed1704e7640d4b Content-Type: text/plain; charset=ISO-8859-1 Xavi, You mean: if rank <= 0x3f then JoinPriority=rank else JoinPriority=0x3f Correct? I think it could be a solution. Thanks Qin On Sat, Sep 28, 2013 at 5:07 AM, Xavier Vilajosana Guillen < xvilajosana@eecs.berkeley.edu> wrote: > Hi Qin, > > my suggestion is to use JoinPriority[5:0] = (rank[15:8]&0x3F) or 0x3F if > bigger -- having a 0x3F would be like having INFINITE Join Priority as in > the case of RPL with ranks>65535. > > would that not work? > X > > > On Fri, Sep 27, 2013 at 1:44 PM, Qin Wang wrote: > >> Xavi, >> >> Let's take the example in your draft to see what the problem is. Please >> point out if I'm wrong. >> +-------+ >> | 0 | R(0)=0 >> | | DAGRank(R(0)) = 0 >> +-------+ >> | >> | >> +-------+ >> | 1 | R(1)=R(0)+683=683 >> | | DAGRank(R(1)) = 2 >> +-------+ >> | >> | >> +-------+ >> | 2 | R(2)=R(1)+683=1366 >> | | DAGRank(R(2)) = 5 >> +-------+ >> | >> | >> +-------+ >> | 3 | R(3)=R(2)+683=2049 >> | | DAGRank(R(3)) = 8 >> +-------+ >> | >> | >> +-------+ >> | 4 | R(4)=R(3)+683=2732 >> | | DAGRank(R(4)) = 10 >> +-------+ >> | >> | >> +-------+ >> | 5 | R(5)=R(4)+683=3415 >> | | DAGRank(R(5)) = 13 >> +-------+ >> >> From the example, you can see R(n) is a 2-byte integer, and DAGRank is >> always the higher byte of the 2byte integer, because minHopRankIncrease = >> 256. >> >> If set JoinPriority = DAGRank, then it is possible JoinPriority> 0x3f >> (although it unlikely happens often), out of its range. >> If set JoinPriority[5:0] = DAGRank[7:2], (Is it your suggestion?), a new >> node may found many existing nodes with same JoinPriority in received EB. >> In another word, the JoinPriority can not provide information about >> preferring joining. Right? >> >> I haven't had good solution for it. So, I hope the range 0x00~0x3f is not >> a "MUST" in IEEE802.15.4e. >> >> What do you think? >> Qin >> >> >> >> >> On Sat, Sep 28, 2013 at 2:30 AM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote: >> >>> Hi Qin, >>> >>> after thinking a little bit on that maybe we can use the higher byte of >>> the rank for that. that is rank>>8, the higher byte is a monotonically >>> increasing counter. As each hop is <<8 (due to minhopRankIncrease) we can >>> have the sense of higher join priority as higher the rank. >>> >>> In addition having if we have the limitation of 0x3F, this means that we >>> will support Join priorities up to 0x3F that translated to ranks are >>> 0x3F<<8 (big number) .. >>> >>> just thoughts... >>> X >>> >>> >>> On Fri, Sep 27, 2013 at 10:30 AM, Qin Wang wrote: >>> >>>> Hi Thomas, >>>> >>>> I think with OF0 the DAGRank is uint8. But, in the Table 52b of >>>> IEEE802.15.4e, the range of Join Priority is 0x00~0x3f. If the range is a >>>> "MUST", we have to have a function mapping a DAGRank in 0x00~0xff to a >>>> JoinPriority in 0x00~0x3f. Correct? >>>> >>>> Would you please confirm with some expertise in IEEE802.15.4e if the >>>> range 0x00~0x3f is a MUST or not? >>>> >>>> Thanks >>>> Qin >>>> >>>> _______________________________________________ >>>> 6tsch mailing list >>>> 6tsch@ietf.org >>>> https://www.ietf.org/mailman/listinfo/6tsch >>>> >>>> >>> >> > --90e6ba613d88a1ed1704e7640d4b Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Xavi,

    You mean:
    if rank <= =3D 0x3f then JoinPriority=3Drank else JoinPriority=3D0x3f

    Correct? I think it could be a solution.

    = Thanks
    Qin


    On Sat, Sep 28, 2013 at 5:07 AM, Xavier Vilajosana Guillen <xvilajosana@eecs.berkeley.edu> wrote:
    Hi Qin,=A0

    my suggestion is to use=A0JoinPriority[5:0] =3D (rank[15:8]&0x3F) or 0x3F if bigger= -- having a 0x3F would be like having INFINITE Join Priority as in the cas= e of RPL with ranks>65535.

    wou= ld that not work?
    X

    On Fri, Sep 27, 2013 at 1:44 PM, Qin Wang <qinwang@berkeley.edu>= wrote:
    Xavi,

    Let's take the example in you= r draft to see what the problem is. Please point out if I'm wrong.
    +-------+
    =A0 =A0 =A0| =A0 0 =A0 | R(0)=3D0
    = =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(0)) =3D 0
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 = =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 1 = =A0 | R(1)=3DR(0)+683=3D683
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(= 1)) =3D 2
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 = =A0| =A0 2 =A0 | R(2)=3DR(1)+683=3D1366
    =A0 =A0 =A0| =A0 =A0 =A0 = | DAGRank(R(2)) =3D 5
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 = =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 3 =A0 | R(3)=3DR(2)+683=3D2049
    =A0 =A0 =A0|= =A0 =A0 =A0 | DAGRank(R(3)) =3D 8
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+= -------+
    =A0 =A0 =A0| =A0 4 =A0 | R(4)=3DR(3)+683=3D2732
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(4)) =3D 10
    =A0 =A0 =A0+= -------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 5 =A0 | R(5)=3DR(4)+6= 83=3D3415
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(5)) =3D 13
    =A0 =A0 =A0+-------+

    From the example, = you can see R(n) is a 2-byte integer, and DAGRank is always the higher byte= of the 2byte integer, because=A0minHopRankIncrease =3D 256.

    =
    If set JoinPriority =3D DAGRank, then it is possible JoinPriority> = 0x3f (although it unlikely happens often), out of its range.=A0
    I= f set JoinPriority[5:0] =3D DAGRank[7:2], (Is it your suggestion?), a new n= ode may found many existing nodes with same JoinPriority in received EB. In= another word, the JoinPriority can not provide information about preferrin= g joining. Right?

    I haven't had good solution for it. So, I hope the = range 0x00~0x3f is not a "MUST" in IEEE802.15.4e.

    <= /div>
    What =A0do you think?
    Qin=A0




    On Sat, Sep 28, 2013 at 2:30 AM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:
    Hi Qin,

    after t= hinking a little bit on that maybe we can use the higher byte of the rank f= or that. that is=A0 rank>>8, the higher byte is a monotonically incre= asing counter. As each hop is <<8 (due to minhopRankIncrease) we can = have the sense of higher join priority as higher the rank.

    In addition having if we have the limitation of 0x3F, this means that w= e will support Join priorities up to 0x3F that translated to ranks are 0x3F= <<8 (big number) ..

    just thoughts...
    X


    On Fri, Sep 27, 2013 at 10:30 = AM, Qin Wang <qinwang@berkeley.edu> wrote:
    Hi Thomas,

    I think with OF0 the DAGRank= is uint8. But, in the Table 52b of IEEE802.15.4e, the range of Join Priori= ty is 0x00~0x3f. If the range is a "MUST", we have to have a func= tion mapping a DAGRank in 0x00~0xff to a JoinPriority in 0x00~0x3f. Correct= ?

    Would you please confirm with some expertise in IEEE802= .15.4e if the range 0x00~0x3f is a MUST or not?

    Th= anks
    Qin

    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch





    --90e6ba613d88a1ed1704e7640d4b-- From xvilajosana@berkeley.edu Fri Sep 27 14:31:58 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5691C21F8F6D for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 14:31:58 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.433 X-Spam-Level: X-Spam-Status: No, score=-2.433 tagged_above=-999 required=5 tests=[AWL=0.543, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id U7c7YLjh2MhG for <6tsch@ietfa.amsl.com>; Fri, 27 Sep 2013 14:31:54 -0700 (PDT) Received: from mail-pb0-f41.google.com (mail-pb0-f41.google.com [209.85.160.41]) by ietfa.amsl.com (Postfix) with ESMTP id 183BC21F9A2D for <6tsch@ietf.org>; Fri, 27 Sep 2013 14:31:44 -0700 (PDT) Received: by mail-pb0-f41.google.com with SMTP id rp2so3087360pbb.0 for <6tsch@ietf.org>; Fri, 27 Sep 2013 14:31:43 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=FnZGOJE0fyrXv5rGxHjV8ggQMPragST2vm5wGtrwZsg=; b=EfeelyJOpJgRNesqnhwngQE0nqIq9Cm1oI6bWtmfschwLYRB1bamk4OdQsmlm9U9cW ak3Wd8rAqvXGqCIjFeaUOjJoYNa5D/NmrCYH7Evy+p0UtDk870JtIEp4l8aWZ/cRhu11 oUWzKwl4mmA7uOX/+hd4jjxwmQxNf5GEDn09tPEnDbLnDWSqwrPtkmaLlQkHuDhHW0D+ MVwA/HFVYgOMHaKEA2FkIFcZvMN3wnd5rDvv2Kl+8IjfK+bDITdgCzidkHEEc9FQ7ws3 8K9wwyEbSLmXsUt6957FUD/+Hc1Tmjsm+zkNIov9KyBbLcc4zAgwYoXW70v7csqeF9Mn v7QA== X-Gm-Message-State: ALoCoQlEGTI6LGuRy4g3/G16MGGGdsqkD7rRI4YkhFLnY7pEBiHSbUn44zpKKAhCHNHfpKqT2+NK MIME-Version: 1.0 X-Received: by 10.67.4.227 with SMTP id ch3mr14235806pad.74.1380317503690; Fri, 27 Sep 2013 14:31:43 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Fri, 27 Sep 2013 14:31:43 -0700 (PDT) In-Reply-To: References: Date: Fri, 27 Sep 2013 14:31:43 -0700 Message-ID: From: Xavier Vilajosana Guillen To: Qin Wang Content-Type: multipart/alternative; boundary=047d7b16018d7c276004e76436b1 Cc: "6tsch@ietf.org" <6tsch@ietf.org> Subject: Re: [6tsch] set DAGRank to Join Priority X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2013 21:31:58 -0000 --047d7b16018d7c276004e76436b1 Content-Type: text/plain; charset=ISO-8859-1 Hi Qin, well the rank is 2Byte, what i suggest is to divide it by 256 and take this number as Join Priority (1Byte). If this number is bigger than 0x3F then the Join Priority becomes 0x3F. Of course this if 0x3F is a strict requirement. regards, Xavi On Fri, Sep 27, 2013 at 2:20 PM, Qin Wang wrote: > Xavi, > > You mean: > if rank <= 0x3f then JoinPriority=rank else JoinPriority=0x3f > > Correct? I think it could be a solution. > > Thanks > Qin > > > On Sat, Sep 28, 2013 at 5:07 AM, Xavier Vilajosana Guillen < > xvilajosana@eecs.berkeley.edu> wrote: > >> Hi Qin, >> >> my suggestion is to use JoinPriority[5:0] = (rank[15:8]&0x3F) or 0x3F if >> bigger -- having a 0x3F would be like having INFINITE Join Priority as in >> the case of RPL with ranks>65535. >> >> would that not work? >> X >> >> >> On Fri, Sep 27, 2013 at 1:44 PM, Qin Wang wrote: >> >>> Xavi, >>> >>> Let's take the example in your draft to see what the problem is. Please >>> point out if I'm wrong. >>> +-------+ >>> | 0 | R(0)=0 >>> | | DAGRank(R(0)) = 0 >>> +-------+ >>> | >>> | >>> +-------+ >>> | 1 | R(1)=R(0)+683=683 >>> | | DAGRank(R(1)) = 2 >>> +-------+ >>> | >>> | >>> +-------+ >>> | 2 | R(2)=R(1)+683=1366 >>> | | DAGRank(R(2)) = 5 >>> +-------+ >>> | >>> | >>> +-------+ >>> | 3 | R(3)=R(2)+683=2049 >>> | | DAGRank(R(3)) = 8 >>> +-------+ >>> | >>> | >>> +-------+ >>> | 4 | R(4)=R(3)+683=2732 >>> | | DAGRank(R(4)) = 10 >>> +-------+ >>> | >>> | >>> +-------+ >>> | 5 | R(5)=R(4)+683=3415 >>> | | DAGRank(R(5)) = 13 >>> +-------+ >>> >>> From the example, you can see R(n) is a 2-byte integer, and DAGRank is >>> always the higher byte of the 2byte integer, because minHopRankIncrease = >>> 256. >>> >>> If set JoinPriority = DAGRank, then it is possible JoinPriority> 0x3f >>> (although it unlikely happens often), out of its range. >>> If set JoinPriority[5:0] = DAGRank[7:2], (Is it your suggestion?), a new >>> node may found many existing nodes with same JoinPriority in received EB. >>> In another word, the JoinPriority can not provide information about >>> preferring joining. Right? >>> >>> I haven't had good solution for it. So, I hope the range 0x00~0x3f is >>> not a "MUST" in IEEE802.15.4e. >>> >>> What do you think? >>> Qin >>> >>> >>> >>> >>> On Sat, Sep 28, 2013 at 2:30 AM, Xavier Vilajosana Guillen < >>> xvilajosana@eecs.berkeley.edu> wrote: >>> >>>> Hi Qin, >>>> >>>> after thinking a little bit on that maybe we can use the higher byte of >>>> the rank for that. that is rank>>8, the higher byte is a monotonically >>>> increasing counter. As each hop is <<8 (due to minhopRankIncrease) we can >>>> have the sense of higher join priority as higher the rank. >>>> >>>> In addition having if we have the limitation of 0x3F, this means that >>>> we will support Join priorities up to 0x3F that translated to ranks are >>>> 0x3F<<8 (big number) .. >>>> >>>> just thoughts... >>>> X >>>> >>>> >>>> On Fri, Sep 27, 2013 at 10:30 AM, Qin Wang wrote: >>>> >>>>> Hi Thomas, >>>>> >>>>> I think with OF0 the DAGRank is uint8. But, in the Table 52b of >>>>> IEEE802.15.4e, the range of Join Priority is 0x00~0x3f. If the range is a >>>>> "MUST", we have to have a function mapping a DAGRank in 0x00~0xff to a >>>>> JoinPriority in 0x00~0x3f. Correct? >>>>> >>>>> Would you please confirm with some expertise in IEEE802.15.4e if the >>>>> range 0x00~0x3f is a MUST or not? >>>>> >>>>> Thanks >>>>> Qin >>>>> >>>>> _______________________________________________ >>>>> 6tsch mailing list >>>>> 6tsch@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>> >>>>> >>>> >>> >> > --047d7b16018d7c276004e76436b1 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Hi Qin,

    well the rank is 2Byte, what i = suggest is to divide it by 256 and take this number as Join Priority (1Byte= ). If this number is bigger than 0x3F then the Join Priority becomes 0x3F. = Of course this if 0x3F is a strict requirement.

    regards,
    Xavi
    =

    On Fri, Sep 27, 2013 at 2:20 PM, Qin Wan= g <qinwang@berkeley.edu> wrote:
    Xavi,

    Yo= u mean:
    if rank <=3D 0x3f then JoinPriority=3Drank else JoinPr= iority=3D0x3f

    Correct? I think it could be a solution.

    =
    Thanks
    Qin
    <= div class=3D"gmail_extra">

    On Sat, Sep 28= , 2013 at 5:07 AM, Xavier Vilajosana Guillen <xvilajosana@eec= s.berkeley.edu> wrote:
    Hi Qin,=A0

    my suggestion is to use=A0JoinPriority[5:0] =3D (rank[15:8]&0x3F) or 0x3F if bigger= -- having a 0x3F would be like having INFINITE Join Priority as in the cas= e of RPL with ranks>65535.

    wou= ld that not work?
    X


    On Fri, Sep 27, 2013 at 1:44 PM, Qin Wang <qinwang@berkeley.edu>= wrote:
    Xavi,

    Let's take the example in you= r draft to see what the problem is. Please point out if I'm wrong.
    +-------+
    =A0 =A0 =A0| =A0 0 =A0 | R(0)=3D0
    = =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(0)) =3D 0
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 = =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 1 = =A0 | R(1)=3DR(0)+683=3D683
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(= 1)) =3D 2
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 = =A0| =A0 2 =A0 | R(2)=3DR(1)+683=3D1366
    =A0 =A0 =A0| =A0 =A0 =A0 = | DAGRank(R(2)) =3D 5
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 = =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 3 =A0 | R(3)=3DR(2)+683=3D2049
    =A0 =A0 =A0|= =A0 =A0 =A0 | DAGRank(R(3)) =3D 8
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+= -------+
    =A0 =A0 =A0| =A0 4 =A0 | R(4)=3DR(3)+683=3D2732
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(4)) =3D 10
    =A0 =A0 =A0+= -------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 5 =A0 | R(5)=3DR(4)+6= 83=3D3415
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(5)) =3D 13
    =A0 =A0 =A0+-------+

    From the example, = you can see R(n) is a 2-byte integer, and DAGRank is always the higher byte= of the 2byte integer, because=A0minHopRankIncrease =3D 256.

    =
    If set JoinPriority =3D DAGRank, then it is possible JoinPriority> = 0x3f (although it unlikely happens often), out of its range.=A0
    I= f set JoinPriority[5:0] =3D DAGRank[7:2], (Is it your suggestion?), a new n= ode may found many existing nodes with same JoinPriority in received EB. In= another word, the JoinPriority can not provide information about preferrin= g joining. Right?

    I haven't had good solution for it. So, I hope the = range 0x00~0x3f is not a "MUST" in IEEE802.15.4e.

    <= /div>
    What =A0do you think?
    Qin=A0




    On Sat, Sep 28, 2013 at 2:30 AM, Xavier Vilajosana G= uillen <xvilajosana@eecs.berkeley.edu> wrote:
    Hi Qin,

    after t= hinking a little bit on that maybe we can use the higher byte of the rank f= or that. that is=A0 rank>>8, the higher byte is a monotonically incre= asing counter. As each hop is <<8 (due to minhopRankIncrease) we can = have the sense of higher join priority as higher the rank.

    In addition having if we have the limitation of 0x3F, this means that w= e will support Join priorities up to 0x3F that translated to ranks are 0x3F= <<8 (big number) ..

    just thoughts...
    X


    On Fri, Sep 27, 2013 at 10:30 = AM, Qin Wang <qinwang@berkeley.edu> wrote:
    Hi Thomas,

    I think with OF0 the DAGRank= is uint8. But, in the Table 52b of IEEE802.15.4e, the range of Join Priori= ty is 0x00~0x3f. If the range is a "MUST", we have to have a func= tion mapping a DAGRank in 0x00~0xff to a JoinPriority in 0x00~0x3f. Correct= ?

    Would you please confirm with some expertise in IEEE802= .15.4e if the range 0x00~0x3f is a MUST or not?

    Th= anks
    Qin

    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch






    --047d7b16018d7c276004e76436b1-- From pthubert@cisco.com Sat Sep 28 00:08:35 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2939A21F9D2E for <6tsch@ietfa.amsl.com>; Sat, 28 Sep 2013 00:08:35 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.382 X-Spam-Level: X-Spam-Status: No, score=-10.382 tagged_above=-999 required=5 tests=[AWL=0.216, BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id S1qOkK8ADkl2 for <6tsch@ietfa.amsl.com>; Sat, 28 Sep 2013 00:08:29 -0700 (PDT) Received: from rcdn-iport-2.cisco.com (rcdn-iport-2.cisco.com [173.37.86.73]) by ietfa.amsl.com (Postfix) with ESMTP id D930721F9D74 for <6tsch@ietf.org>; Sat, 28 Sep 2013 00:08:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=14462; q=dns/txt; s=iport; t=1380352109; x=1381561709; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=UKo+qjkmvPp7Zar/9LKAQ48/DtlTGbhFwYUy3TNIyqI=; b=koi0bp5gwjfUKK7IhH/S18cDnAPduClvxZnw9LFRW7D2sGGAkU+HGOdr qkqq+cOmtsPhO1kM7AGl9EmBZpEopS5a71/8ZuobuDW7CumMrP/9lnEod QePFYMX/uLItXvmCAzHYAmyN2bnOiWLEZ1jN+IjvqthusQpEt7qTlDa1i Q=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Ah0FALF/RlKtJV2b/2dsb2JhbABaDoI1RDjBM4EfFnSCJgEBBAEBAWgDCxACAQg/BycLFBECBA4FG4drDLosBI9NBAeDH4EBA4kBjn6ReIJlPw X-IronPort-AV: E=Sophos;i="4.90,998,1371081600"; d="scan'208,217";a="265583036" Received: from rcdn-core-4.cisco.com ([173.37.93.155]) by rcdn-iport-2.cisco.com with ESMTP; 28 Sep 2013 07:08:28 +0000 Received: from xhc-rcd-x03.cisco.com (xhc-rcd-x03.cisco.com [173.37.183.77]) by rcdn-core-4.cisco.com (8.14.5/8.14.5) with ESMTP id r8S78R6Y019440 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Sat, 28 Sep 2013 07:08:28 GMT Received: from xmb-rcd-x01.cisco.com ([169.254.1.197]) by xhc-rcd-x03.cisco.com ([173.37.183.77]) with mapi id 14.02.0318.004; Sat, 28 Sep 2013 02:08:27 -0500 From: "Pascal Thubert (pthubert)" To: "" Thread-Topic: [6tsch] set DAGRank to Join Priority Thread-Index: AQHOu8JmNXGLm22siEm3W+FVqLqbEZnaZ1UAgAADsgCAAAMxgIAATVL1 Date: Sat, 28 Sep 2013 07:08:27 +0000 Message-ID: <7BC11E20-73E1-4A12-A227-02558705D01D@cisco.com> References: , In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: multipart/alternative; boundary="_000_7BC11E2073E14A12A22702558705D01Dciscocom_" MIME-Version: 1.0 Cc: "6tsch@ietf.org" <6tsch@ietf.org>, Qin Wang Subject: Re: [6tsch] set DAGRank to Join Priority X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Sep 2013 07:08:35 -0000 --_000_7BC11E2073E14A12A22702558705D01Dciscocom_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Agreed Say the rule is as discussed earlier: Rank =3D sigma (etx*2*mh) where mh is 256. Thus dagrank <=3D 2*sigma(etx) Let us be honest, even with an etx of 3 this gives us 8 hops, which leaves = very little chances to deliver in time. For a classical mesh we are shooting at 4 or 5 hops so 3f should be enough. For long and static lines, we may resort to hop count though. What do others think? Pascal Le 27 sept. 2013 =E0 23:34, "Xavier Vilajosana Guillen" > a =E9crit : Hi Qin, well the rank is 2Byte, what i suggest is to divide it by 256 and take this= number as Join Priority (1Byte). If this number is bigger than 0x3F then t= he Join Priority becomes 0x3F. Of course this if 0x3F is a strict requireme= nt. regards, Xavi On Fri, Sep 27, 2013 at 2:20 PM, Qin Wang > wrote: Xavi, You mean: if rank <=3D 0x3f then JoinPriority=3Drank else JoinPriority=3D0x3f Correct? I think it could be a solution. Thanks Qin On Sat, Sep 28, 2013 at 5:07 AM, Xavier Vilajosana Guillen > wrote: Hi Qin, my suggestion is to use JoinPriority[5:0] =3D (rank[15:8]&0x3F) or 0x3F if = bigger -- having a 0x3F would be like having INFINITE Join Priority as in t= he case of RPL with ranks>65535. would that not work? X On Fri, Sep 27, 2013 at 1:44 PM, Qin Wang > wrote: Xavi, Let's take the example in your draft to see what the problem is. Please poi= nt out if I'm wrong. +-------+ | 0 | R(0)=3D0 | | DAGRank(R(0)) =3D 0 +-------+ | | +-------+ | 1 | R(1)=3DR(0)+683=3D683 | | DAGRank(R(1)) =3D 2 +-------+ | | +-------+ | 2 | R(2)=3DR(1)+683=3D1366 | | DAGRank(R(2)) =3D 5 +-------+ | | +-------+ | 3 | R(3)=3DR(2)+683=3D2049 | | DAGRank(R(3)) =3D 8 +-------+ | | +-------+ | 4 | R(4)=3DR(3)+683=3D2732 | | DAGRank(R(4)) =3D 10 +-------+ | | +-------+ | 5 | R(5)=3DR(4)+683=3D3415 | | DAGRank(R(5)) =3D 13 +-------+ >From the example, you can see R(n) is a 2-byte integer, and DAGRank is alwa= ys the higher byte of the 2byte integer, because minHopRankIncrease =3D 256= . If set JoinPriority =3D DAGRank, then it is possible JoinPriority> 0x3f (al= though it unlikely happens often), out of its range. If set JoinPriority[5:0] =3D DAGRank[7:2], (Is it your suggestion?), a new = node may found many existing nodes with same JoinPriority in received EB. I= n another word, the JoinPriority can not provide information about preferri= ng joining. Right? I haven't had good solution for it. So, I hope the range 0x00~0x3f is not a= "MUST" in IEEE802.15.4e. What do you think? Qin On Sat, Sep 28, 2013 at 2:30 AM, Xavier Vilajosana Guillen > wrote: Hi Qin, after thinking a little bit on that maybe we can use the higher byte of the= rank for that. that is rank>>8, the higher byte is a monotonically increa= sing counter. As each hop is <<8 (due to minhopRankIncrease) we can have th= e sense of higher join priority as higher the rank. In addition having if we have the limitation of 0x3F, this means that we wi= ll support Join priorities up to 0x3F that translated to ranks are 0x3F<<8 = (big number) .. just thoughts... X On Fri, Sep 27, 2013 at 10:30 AM, Qin Wang > wrote: Hi Thomas, I think with OF0 the DAGRank is uint8. But, in the Table 52b of IEEE802.15.= 4e, the range of Join Priority is 0x00~0x3f. If the range is a "MUST", we h= ave to have a function mapping a DAGRank in 0x00~0xff to a JoinPriority in = 0x00~0x3f. Correct? Would you please confirm with some expertise in IEEE802.15.4e if the range = 0x00~0x3f is a MUST or not? Thanks Qin _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch _______________________________________________ 6tsch mailing list 6tsch@ietf.org https://www.ietf.org/mailman/listinfo/6tsch --_000_7BC11E2073E14A12A22702558705D01Dciscocom_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
    Agreed

    Say the rule is as discussed earlier:
    Rank =3D sigma (etx*2*mh) where mh is 256.
    Thus dagrank <=3D 2*sigma(etx)

    Let us be honest, even with an etx of 3 this gives us 8 hops, which le= aves very little chances to deliver in time.

    For a classical mesh we are shooting at 4 or 5 hops so 3f should be en= ough.

    For long and static lines, we may resort to hop count though.   
    What do others think?

    Pascal

    Le 27 sept. 2013 =E0 23:34, "Xavier Vilajosana Guillen" <xvilajosana@eecs.berkeley.edu> a =E9crit :

    Hi Qin,

    well the rank is 2Byte, what i suggest is to divide it by 256 and take= this number as Join Priority (1Byte). If this number is bigger than 0x3F t= hen the Join Priority becomes 0x3F. Of course this if 0x3F is a strict requ= irement.

    regards,
    Xavi


    On Fri, Sep 27, 2013 at 2:20 PM, Qin Wang <qinwang@berke= ley.edu> wrote:
    Xavi,

    You mean:
    if rank <=3D 0x3f then JoinPriority=3Drank else JoinPriority=3D0x3f=

    Correct? I think it could be a solution.

    Thanks
    Qin


    On Sat, Sep 28, 2013 at 5:07 AM, Xavier Vilajosa= na Guillen <xvilajosana@eecs.berkeley.edu> wrote:
    Hi Qin, 

    my suggestion is to use JoinPriority[5:0] =3D (rank[15:8]&0x3F) or 0x3F if b= igger -- having a 0x3F would be like having INFINITE Join Priority as in th= e case of RPL with ranks>65535.

    would that= not work?
    X


    On Fri, Sep 27, 2013 at 1:44 PM, Qin Wang <qinwang@berke= ley.edu> wrote:
    Xavi,

    Let's take the example in your draft to see what the problem is. Pleas= e point out if I'm wrong.
    +-------+
         |   0   | R(0)=3D0
         |       | DAGRank(R(0)) =3D 0
         +-------+
             |
             |
         +-------+
         |   1   | R(1)=3DR(0)+683=3D683
         |       | DAGRank(R(1)) =3D 2
         +-------+
             |
             |
         +-------+
         |   2   | R(2)=3DR(1)+683=3D1366
         |       | DAGRank(R(2)) =3D 5
         +-------+
             |
             |
         +-------+
         |   3   | R(3)=3DR(2)+683=3D2049
         |       | DAGRank(R(3)) =3D 8
         +-------+
             |
             |
         +-------+
         |   4   | R(4)=3DR(3)+683=3D2732
         |       | DAGRank(R(4)) =3D 10
         +-------+
             |
             |
         +-------+
         |   5   | R(5)=3DR(4)+683=3D3415
         |       | DAGRank(R(5)) =3D 13
         +-------+

    From the example, you can see R(n) is a 2-byte integer, and DAGRank is= always the higher byte of the 2byte integer, because minHopRankIncrea= se =3D 256.

    If set JoinPriority =3D DAGRank, then it is possible JoinPriority> = 0x3f (although it unlikely happens often), out of its range. 
    If set JoinPriority[5:0] =3D DAGRank[7:2], (Is it your suggestion?), a= new node may found many existing nodes with same JoinPriority in received = EB. In another word, the JoinPriority can not provide information about pre= ferring joining. Right?

    I haven't had good solution for it. So, I hope the range 0x00~0x3f is = not a "MUST" in IEEE802.15.4e.

    What  do you think?
    Qin 




    On Sat, Sep 28, 2013 at 2:30 AM, Xavier Vilajosa= na Guillen <xvilajosana@eecs.berkeley.edu> wrote:
    Hi Qin,

    after thinking a little bit on that maybe we can use the higher byte of the= rank for that. that is  rank>>8, the higher byte is a monotonic= ally increasing counter. As each hop is <<8 (due to minhopRankIncreas= e) we can have the sense of higher join priority as higher the rank.

    In addition having if we have the limitation of 0x3F, this means that we wi= ll support Join priorities up to 0x3F that translated to ranks are 0x3F<= <8 (big number) ..

    just thoughts...
    X


    On Fri, Sep 27, 2013 at 10:30 AM, Qin Wang <qinwang@berkeley.edu> wrote:
    Hi Thomas,

    I think with OF0 the DAGRank is uint8. But, in the Table 52b of IEEE80= 2.15.4e, the range of Join Priority is 0x00~0x3f. If the range is a "M= UST", we have to have a function mapping a DAGRank in 0x00~0xff to a J= oinPriority in 0x00~0x3f. Correct?

    Would you please confirm with some expertise in IEEE802.15.4e if the r= ange 0x00~0x3f is a MUST or not?

    Thanks
    Qin

    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch






    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    https://www.i= etf.org/mailman/listinfo/6tsch
    --_000_7BC11E2073E14A12A22702558705D01Dciscocom_-- From twatteyne@gmail.com Sat Sep 28 12:32:50 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7378C11E8155 for <6tsch@ietfa.amsl.com>; Sat, 28 Sep 2013 12:32:50 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.267 X-Spam-Level: X-Spam-Status: No, score=-1.267 tagged_above=-999 required=5 tests=[AWL=0.110, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, J_CHICKENPOX_46=0.6, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ly8DFKQ6ptYT for <6tsch@ietfa.amsl.com>; Sat, 28 Sep 2013 12:32:48 -0700 (PDT) Received: from mail-pb0-x230.google.com (mail-pb0-x230.google.com [IPv6:2607:f8b0:400e:c01::230]) by ietfa.amsl.com (Postfix) with ESMTP id BFB2E11E8146 for <6tsch@ietf.org>; Sat, 28 Sep 2013 12:32:48 -0700 (PDT) Received: by mail-pb0-f48.google.com with SMTP id ma3so3884128pbc.21 for <6tsch@ietf.org>; Sat, 28 Sep 2013 12:32:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=vdNWn1Q/uayYWteJoaQHuHMgOGwOu8Xolk3Lb/n+IYs=; b=zJYjRFfE2DcFkeDBhu9N5EPQHC0/E3Jq+Ic/KGQZURAT+Ud9J5DB9R91LRoYVj/Zuj cPrB+6q74jn7CfOvJGynM9kuhzZdhTGvNpHd4fSkA+OSkbo+J4XTUiQhlaybJbF6jQJP tL8TytecS/VRVxS89tCoVHGn2is0282BBmfV0M//LC1OBbVrT/k+gbssYOvXNXqflkio A2ntbUuEhuOeI5n8Fu2RzTyBhaL+51jpamgNpEzFc1ggpvdWXehc5Z0yp9jgVHaVi6Y/ DM+KR9+N9bx0LSPp5NxY4S5awdzEcUu4sTIm58rTUjIAHlEPHoosNKVQYY1cKI5JUznx Z+sA== X-Received: by 10.68.236.103 with SMTP id ut7mr14632784pbc.118.1380396767380; Sat, 28 Sep 2013 12:32:47 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Sat, 28 Sep 2013 12:32:27 -0700 (PDT) From: Thomas Watteyne Date: Sat, 28 Sep 2013 12:32:27 -0700 X-Google-Sender-Auth: rvVqnnxORgSknGPtR9c9Kt_if-s Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b33daa8f80bfe04e776aac4 Subject: [6tsch] minutes webex 27 September 2013 X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Sep 2013 19:32:50 -0000 --047d7b33daa8f80bfe04e776aac4 Content-Type: text/plain; charset=ISO-8859-1 All, You will find the minutes of this week's webex below. FYI, all the minutes and slides are archived a https://bitbucket.org/6tsch/meetings/. Thanks to Xavi and Dominique for taking notes! As usual, please fix anything we might have missed directly in the e-mail and reply. We will approve and adopt the minutes at the beginning of the next call. Thomas ----- Minutes Webex 27 September 2013, 6TiSCH group Note: timestamps in PDT. Taking notes *(using Etherpad)* 1. Xavi Vilajosana 2. Dominique Barthel 3. Thomas Watteyne Present *(alphabetically)* 1. Diego Dujovne 2. Dominique Barthel 3. Elvis Vogli 4. Geraldine Texier 5. Guillaume Gaillard 6. Maria Rita Palattella 7. Nicolas Montavont 8. Pascal Thubert 9. Patrick Wetterwald 10. Pouria Zand 11. Qin Wang 12. Raghuram Sudhaakar 13. Thomas Watteyne 14. Tom Phinney 15. Xavi Vilajosana Recording - Webex recording (audio+slides,streaming) - https://cisco.webex.com/ciscosales/lsr.php?AT=pb&SP=MC&rID=71782597&rKey=bb46423ee899697a *[63min]* Slides - slides_130927_webex.ppt: slides shared during the call Action Items - *Xavi* to put paragraph in minimal draft about relationship between ASN and timestamp. - *Qin* to discuss limit of join priority on ML. - *All* review minimal draft ( https://bitbucket.org/6tsch/draft-vilajosana-6tsch-basic/src) by next call. Post feedback on ML. Agenda - Administrivia *[4min]* - Approval agenda - Approval minutes last call - cut-off dates - update draft architecture *[Pascal]* - Update minimal draft *[Xavi]* *[15min]* - See latest version at https://bitbucket.org/6tsch/draft-vilajosana-6tsch-basic/src - models *[Pascal]* *[15min]* - data - information - interaction - discussion model draft *[Maria Rita,Pouria,Raghuram,Qin]* *[25min]* - overview Wednesday discussion - open questions (URI, method, triggers, profiles, 6top) - roadmap - AOB *[1min]* Minutes - *[08.05]* Meeting starts - *[08.06]* Administrivia - Approval agenda No issues raised. Agenda approved. - Approval minutes last call No issues raised. Minutes approved. - WG formation status: - 6TiSCH discussed during IESG telechat 2013-09-26 - slight changes to charter following discussion. - See current charter at https://datatracker.ietf.org/doc/charter-ietf-6tisch/ - prepare for renaming of: - mailing list - bitbucket group - Vancouver important dates: - see http://www.ietf.org/meeting/cutoff-dates-2013.html#IETF88 - draft submission cut-off: 21-10-2013 - update draft architecture *[Pascal]* - Major changes: - Section 8. Network synchronization - Time Synchronization Global Instance (TSGI) - Section 10. Management - add subsections about beacon interaction. Still WIP. - check latest version on the site - *[08.15]* Update minimal draft *[Xavi]* - See latest version at https://bitbucket.org/6tsch/draft-vilajosana-6tsch-basic/src - Already renamed the draft. Waiting for feedback to publish new version. - slotframe representation: - first slot for EB - 5 shared slots - the rest of the slotframe is unused - timeslot timing - we need to define the timings. The draft contains a table with the timings. People need to implement these timings to interoperate. - EB: need to contain a minimum number of IEs - syncIE (IE, join priority). How use join priority discussed in draft. - Frame and link IE. If a mote doesn't pre-configure, can configure its slotframe based on information in IE. - ACK: contains time correction IE (same as IEEE802.15.4e) - neighbors - some information kept per neighbor, including counter, address, RPL rank. - *[Pascal]* Can we remove ASN? - *[Xavi]* we could replace name "ASN" by "timestamp" in the description of the tables. - *[Qin]* according to IEEE802.15.4, join priority can go from 0 to 0x3f. - *[Xavi]* OK, will investigate. - *[Pouria]* counter for "number of acknowledge". Since shared cell, can we use this information as a good metric for qualifying the quality of the link? - *[Xavi]* we only need to collect information, other pieces will decide what to do with this information. - RFC6552, using OF0 - Xavi presents an example, that is now in the draft. - *[Pascal]* modified slides slightly, removed leftover f. - *[Xavi]* Thanks. Probably not in draft, will check. - Please send more comments before submitting. - *[Pascal]* Hysteresys? - *[Xavi]* Yes, in draft. Action item: all review by next call. - *[Qin]* Maximum value of join priority 0x3f. Could we ask IEEE802.15.4e author why? - *[Thomas]* Important point. Please discuss on ML. - *[08.33]* models *[Pascal]* - information model: its goal is to define a model that can be extended. - we don't feel 100% confident to write an information model. - we can take advantage of Qin's work on 6top. - start with data model using CoAP and CBOR. From there, we will be in better shape to write information model. - our goal is not to describe an information that has everything, but one that can be extended. This will be very visible in data model. - "interaction model" is a term that came up, which for example indicates the difference between GET and Observe. - want to insist that pub/sub and source/sink models are used in industrial. We need to make sure CoAP can support them. - side note: asked the ROLL WG to make http://tools.ietf.org/html/draft-ietf-roll-rpl-industrial-applicability-01 into RFC. Allows us to easily refer to it. - *[Pascal]* Tom, can you comment on the usability of CoAP for can be used for client/server, pub/sub and source/sink models? - *[Tom]* - client/server is 1-to-1 direct communications. - The server can be addressed by role. There is a binding issue. - pub/sub: set of subscribers, 1-to-n relationship. Source of information sends to multiple addressees. - pub/sub is a publication model, with a set of subscribers. More scalable. - pub/sub is connected. Subscription process. Fundamental abstraction. Long-term association. - pub/sub: one of the challenges is how it is implemented. - Works well when the number of receivers is not known in advance. - Source/sink is used to distribute alerts. Alarms have different keying model. - summarize: - pub/sub is 1-to-n. For example, military fire control systems, anyone interested in this information, listen to it. Multicast. - source/sink used for alerts. Something going wrong. Many sources information such as alert. Many receivers want to receive all. Typically, want to receive all alerts from a specific segment. multicast, not connected. - CoAP can be used for any of these, we just need multicast. - pub/sub for sensor readings. - source/sink is both for data and signalling. process alarm. - No attempts at retries in source/sink. - *[Thomas]* How much of is related to the network, or how much of is related to the data - *[Tom]* most of the interaction models are mostly of interaction of the data and not for management or control of the data. - *[08.50]* discussion model draft *[Maria Rita]* - overview Wednesday discussion - private e-mail and round table on webex on 09/25. - 6top is heart of the 6tisch work and architecture. - Manages MIB - exposes an API - API already defined in 6top draft. - Principles: - different apps with different requirements - Cannot define everything -> require mechanism to be extensible - Hybrid use cases: centralized and distributed models. - Three mechanisms: - neighbor to neighbor negotiation (already in 6top draft) - Distributed Multi-hop reservation (RSVP-like) - CoAP endpoint to 6top - our focus by now. - Scheduling approaches. - not addressing specific scheduling approaches. Using the 3 mechanisms, can implement a wide range of scheduling solutions: - decentralized RSVP-like reservation - purely centralized (e.g. TASA) - Multiple PCEs - on-the-fly decentralized reservation - cluster-based model - etc. - we need to identify scenarios and define mechanisms as building blocks NOT specific mechanisms. - scope: - give access to give 6top over CoAP - expose the list of commands over CoAP. - *[Thomas]* in 6top, negotiation is done using TLVs in IE. It would be interesting if the same format in the negotiation phase at 6top and the negotiation phase on CoAP. i.e having same payload format in msg carried by CoAP to 6top and messages between 6top layer in different nodes. - *[Qin]* Use TLV vs CBOR? how to combine? - *[Qin]* define what is a resource (either the element we want to modify (e.g table) or a field on a table. So we need to discuss what the granularity of a resource defined as a CoAP URI is. - Propose new call on the ML in case this needs to be further discussed during the week. - *[09.08]* AOB No other issues raised. - *[09.09]* Meeting ends --047d7b33daa8f80bfe04e776aac4 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    All,

    You will find the = minutes of this week's webex below.

    FYI, all t= he minutes and slides are archived a https://bitbucket.org/6tsch/meetings/.

    Thanks to Xavi and Dominique for taking notes!

    As usual, please fix anything we might have missed directl= y in the e-mail and reply. We will approve and adopt the minutes at the beg= inning of the next call.

    Thomas

    -----

    Minutes Webex 27 September 2013, 6TiSCH group

    Note: timestamps in PDT.

    Taking notes=A0(using Etherpad)

    1. Xavi Vilajo= sana
    2. Dominique Ba= rthel
    3. Th= omas Watteyne

    Present=A0(alphabetically)

    1. Diego Dujovne
    2. Dominique Ba= rthel
    3. El= vis Vogli
    4. Guillaume Gaillard
    5. Maria Rita Palattella
    6. Nicolas Montavont
    7. Pascal Thubert
    8. Patrick Wetterwald
    9. Pouria Zand
    10. Qin Wang
    11. Raghuram Sudhaakar
    12. Thomas Watteyne
    13. Tom Phinney
    14. Xavi Vilajosana

    Recording

    = Slides

    = Action Items

    = Agenda

    • Administrivi= a=A0[4min]
      • Approval agenda
        • <= li style=3D"margin:10px 0px;padding:0px;word-wrap:break-word"> Approval minutes last call
      • cut-off dates
      • update draft architecture=A0[Pascal]
    • Up= date minimal draft=A0[Xavi]=A0[15min]
    • mo= dels=A0[Pascal]=A0[15min]
      • data
      • inf= ormation
      • interaction
    • discussion model draft=A0[Maria Rita,Pouria,Raghuram,Qin]= =A0[25min]
      • overview Wednesday di= scussion
      • open questio= ns (URI, method, triggers, profiles, 6top)
      • roadmap
    • AOB=A0[1min]

    Minutes

    • [08.05]<= /em>=A0Meeting starts
    • [08.06]=A0Administrivia
      • Approval age= nda

        No issues raised. = Agenda approved.

      • Approval minutes last call

        No issues raised. = Minutes approved.

      • WG formation status:
      • Vancouver important dates:
      • update draft architecture=A0= [Pascal]
        • Major changes:
          • Section 8. Network synchron= ization
            • Time Synchronization Global Instance (TSGI)
          • Section 10. Management
            • add subsections about beacon interaction. Still WIP.
          • check latest version= on the site
    • [08.15]=A0Update minimal draft=A0[Xavi]
      • See latest version at=A0https://bitbuck= et.org/6tsch/draft-vilajosana-6tsch-basic/src
      • Already rena= med the draft. Waiting for feedback to publish new version.
      • slotframe representat= ion:
        • first slot f= or EB
        • 5 = shared slots
        • the rest of the slotframe is unused
      • timeslot timing
        • we need to define the timings. The draft contains a table with the timings.= People need to implement these timings to interoperate.
        • EB: need to contain a mini= mum number of IEs
          • syncIE (IE, = join priority). How use join priority discussed in draft.
          • Frame and link IE. If a m= ote doesn't pre-configure, can configure its slotframe based on informa= tion in IE.
        • AC= K: contains time correction IE (same as IEEE802.15.4e)
        • neighbors
          • some informa= tion kept per neighbor, including counter, address, RPL rank.
      • [Pascal]=A0Can we remove ASN?
      • [Xav= i]=A0we could replace name "ASN" by "timestamp"= ; in the description of the tables.
      • [Qin]=A0according to IEEE802.15.4, join priority can go fr= om 0 to 0x3f.
      • [Xavi]=A0OK, will investigate.
      • [Pouria]=A0counter for "number of acknowledge". = Since shared cell, can we use this information as a good metric for qualify= ing the quality of the link?
      • [Xavi]=A0we only need to collect information, other pieces= will decide what to do with this information.
      • RFC6552, using OF0
      • Xavi presents an example, that is now in the draft.
      • [Pascal]=A0mod= ified slides slightly, removed leftover f.
      • [Xavi]=A0Thanks. Probably not in draft, will check.
        • Please send mo= re comments before submitting.
      • [Pascal]=A0Hysteresys?
      • [Xavi]=A0Yes, in draft.

        Action item: all r= eview by next call.

      • [Qin]=A0Maximum value of join= priority 0x3f. Could we ask IEEE802.15.4e author why?
      • [Tho= mas]=A0Important point. Please discuss on ML.
    • [08.33]= =A0models=A0[Pascal]
      • information = model: its goal is to define a model that can be extended.
      • we don't feel 100% c= onfident to write an information model.
      • we can take = advantage of Qin's work on 6top.
      • start with data model using CoAP and CBOR. Fro= m there, we will be in better shape to write information model.
      • our goal is = not to describe an information that has everything, but one that can be ext= ended. This will be very visible in data model.
      • "interaction model" is a term that came up, which for example ind= icates the difference between GET and Observe.
      • want to insist that pub/sub and sour= ce/sink models are used in industrial. We need to make sure CoAP can suppor= t them.
      • side note: a= sked the ROLL WG to make=A0http://tools.ietf.org/h= tml/draft-ietf-roll-rpl-industrial-applicability-01=A0into RFC. Allows = us to easily refer to it.
      • [Pas= cal]=A0Tom, can you comment on the usability of CoAP for can be us= ed for client/server, pub/sub and source/sink models?
      • [Tom]
        • client/server is 1-= to-1 direct communications.
        • The server can be addressed by role. There is a binding issue.
        • pub/sub: set of subs= cribers, 1-to-n relationship. Source of information sends to multiple addre= ssees.
        • pub/sub is a= publication model, with a set of subscribers. More scalable.
        • pub/sub is connected.= Subscription process. Fundamental abstraction. Long-term association.
        • pub/sub: one= of the challenges is how it is implemented.
        • Works well when the number of receiver= s is not known in advance.
        • Source/sink = is used to distribute alerts. Alarms have different keying model.
        • summarize:
          • pub/sub is 1= -to-n. For example, military fire control systems, anyone interested in thi= s information, listen to it. Multicast.
          • source/sink used for alerts. Something going wrong. Many sources informatio= n such as alert. Many receivers want to receive all. Typically, want to rec= eive all alerts from a specific segment. multicast, not connected.
          • CoAP can be = used for any of these, we just need multicast.
        • pub/sub for sensor reading= s.
        • source/sink = is both for data and signalling. process alarm.
        • No attempts at retries in source/si= nk.
      • [Thomas]=A0How much of is related to the network, or how muc= h of is related to the data
      • [Tom]=A0most of the interaction models are mostly of inter= action of the data and not for management or control of the data.
      =
    • [08= .50]=A0discussion model draft=A0[Maria Rita]
      • overview Wed= nesday discussion
        • private e-mail and round= table on webex on 09/25.
        • 6top is hear= t of the 6tisch work and architecture.
        • Manages MIB
        • exposes an API
        • API already defined in 6top draft.
        • Principles:
          • different ap= ps with different requirements
          • Cannot define everything -> require mechanism to = be extensible
          • Hybrid use c= ases: centralized and distributed models.
        • Three mechanisms:
          • neighbor to = neighbor negotiation (already in 6top draft)
          • Distributed Multi-hop reservation (RSV= P-like)
          • CoAP endpoin= t to 6top - our focus by now.
        • Scheduling approaches.
          • not addressi= ng specific scheduling approaches. Using the 3 mechanisms, can implement a = wide range of scheduling solutions:
            • decentralize= d RSVP-like reservation
            • purely centralized (e.g. TASA)
            • Multiple PCEs
            • on-the-fly decentralized reservation
            • cluster-based model
            • etc.
          • we need to identify scenarios and define mechanisms as building bloc= ks NOT specific mechanisms.
        • scope:
          • give access to give 6top over CoAP<= /li>
          • expose t= he list of commands over CoAP.
        • [Thomas]=A0in 6top, negotiation is done using TLVs in IE. It= would be interesting if the same format in the negotiation phase at 6top a= nd the negotiation phase on CoAP. i.e having same payload format in msg car= ried by CoAP to 6top and messages between 6top layer in different nodes.
        • [Qin= ]=A0Use TLV vs CBOR? how to combine?
        • [Qin]=A0define what = is a resource (either the element we want to modify (e.g table) or a field = on a table. So we need to discuss what the granularity of a resource define= d as a CoAP URI is.
        • Propose new = call on the ML in case this needs to be further discussed during the week.<= /li>
    • [09.08]=A0AOB

      No other issues raised.

    • [09.09]=A0Meeting ends
    <= /div>
    --047d7b33daa8f80bfe04e776aac4-- From twatteyne@gmail.com Sat Sep 28 12:42:39 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C9DB711E8153 for <6tsch@ietfa.amsl.com>; Sat, 28 Sep 2013 12:42:39 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.573 X-Spam-Level: X-Spam-Status: No, score=-1.573 tagged_above=-999 required=5 tests=[AWL=0.404, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ykb2+NM4oB6W for <6tsch@ietfa.amsl.com>; Sat, 28 Sep 2013 12:42:38 -0700 (PDT) Received: from mail-pd0-x230.google.com (mail-pd0-x230.google.com [IPv6:2607:f8b0:400e:c02::230]) by ietfa.amsl.com (Postfix) with ESMTP id C2BBF11E8159 for <6tsch@ietf.org>; Sat, 28 Sep 2013 12:42:38 -0700 (PDT) Received: by mail-pd0-f176.google.com with SMTP id q10so3954385pdj.35 for <6tsch@ietf.org>; Sat, 28 Sep 2013 12:42:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=6um7X9JBYx0IH3O1Zlf1mXTAYnNZQrzPnyqMSPuCSpc=; b=qcfl52WpLmvdUd8tL5rf23H99vKcyTAeu5gFDF9iuX5+A2O/mpLfdvpcFW4lW7Mg9O SaTw3/gfprJtIF1hQFy4ME28NiPAN3vqWFmC4SKohc8cVo5B/PDUTIYdyVJDzl7VVVh3 s0Cyuz/baJGl5xNiU/uJA2YA2dcBFr0C/obbMwfgqJRIRVprdcB6LiO5d4WFfq4wjSE0 NYQAXbg8m+CLWEEbxiZ48s/O5+ZkcC4VIgO6dWMzIzMMduuf3K+QZcWsmsEZEAJ4qJs4 82ztSpulAUjwUlF0ehM6XyEjxJMHT6+o/H9ghL8Jeqs/w1GwTOFzu58fh7oWiJzwU8hd AZ3A== X-Received: by 10.68.171.193 with SMTP id aw1mr14534399pbc.131.1380397358415; Sat, 28 Sep 2013 12:42:38 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Sat, 28 Sep 2013 12:42:18 -0700 (PDT) In-Reply-To: <7BC11E20-73E1-4A12-A227-02558705D01D@cisco.com> References: <7BC11E20-73E1-4A12-A227-02558705D01D@cisco.com> From: Thomas Watteyne Date: Sat, 28 Sep 2013 12:42:18 -0700 X-Google-Sender-Auth: 13ILiMabHouexA11Shn_s_Haagw Message-ID: To: "6tsch@ietf.org" <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7b67360432858b04e776ce46 Subject: Re: [6tsch] set DAGRank to Join Priority X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Sep 2013 19:42:39 -0000 --047d7b67360432858b04e776ce46 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Qin, In IEEE802.15.4e, Table 52b indeed shows a range of 0x00-0x3f. Yet, Figure 48ee shows a 1-byte field. I'll go on a little hunt to understand where those 2 bits went, will let you know. Thomas On Sat, Sep 28, 2013 at 12:08 AM, Pascal Thubert (pthubert) < pthubert@cisco.com> wrote: > Agreed > > Say the rule is as discussed earlier: > Rank =3D sigma (etx*2*mh) where mh is 256. > Thus dagrank <=3D 2*sigma(etx) > > Let us be honest, even with an etx of 3 this gives us 8 hops, which > leaves very little chances to deliver in time. > > For a classical mesh we are shooting at 4 or 5 hops so 3f should be > enough. > > For long and static lines, we may resort to hop count though. > > What do others think? > > Pascal > > Le 27 sept. 2013 =E0 23:34, "Xavier Vilajosana Guillen" < > xvilajosana@eecs.berkeley.edu> a =E9crit : > > Hi Qin, > > well the rank is 2Byte, what i suggest is to divide it by 256 and take > this number as Join Priority (1Byte). If this number is bigger than 0x3F > then the Join Priority becomes 0x3F. Of course this if 0x3F is a strict > requirement. > > regards, > Xavi > > > On Fri, Sep 27, 2013 at 2:20 PM, Qin Wang wrote: > >> Xavi, >> >> You mean: >> if rank <=3D 0x3f then JoinPriority=3Drank else JoinPriority=3D0x3f >> >> Correct? I think it could be a solution. >> >> Thanks >> Qin >> >> >> On Sat, Sep 28, 2013 at 5:07 AM, Xavier Vilajosana Guillen < >> xvilajosana@eecs.berkeley.edu> wrote: >> >>> Hi Qin, >>> >>> my suggestion is to use JoinPriority[5:0] =3D (rank[15:8]&0x3F) or 0x3= F >>> if bigger -- having a 0x3F would be like having INFINITE Join Priority = as >>> in the case of RPL with ranks>65535. >>> >>> would that not work? >>> X >>> >>> >>> On Fri, Sep 27, 2013 at 1:44 PM, Qin Wang wrote: >>> >>>> Xavi, >>>> >>>> Let's take the example in your draft to see what the problem is. >>>> Please point out if I'm wrong. >>>> +-------+ >>>> | 0 | R(0)=3D0 >>>> | | DAGRank(R(0)) =3D 0 >>>> +-------+ >>>> | >>>> | >>>> +-------+ >>>> | 1 | R(1)=3DR(0)+683=3D683 >>>> | | DAGRank(R(1)) =3D 2 >>>> +-------+ >>>> | >>>> | >>>> +-------+ >>>> | 2 | R(2)=3DR(1)+683=3D1366 >>>> | | DAGRank(R(2)) =3D 5 >>>> +-------+ >>>> | >>>> | >>>> +-------+ >>>> | 3 | R(3)=3DR(2)+683=3D2049 >>>> | | DAGRank(R(3)) =3D 8 >>>> +-------+ >>>> | >>>> | >>>> +-------+ >>>> | 4 | R(4)=3DR(3)+683=3D2732 >>>> | | DAGRank(R(4)) =3D 10 >>>> +-------+ >>>> | >>>> | >>>> +-------+ >>>> | 5 | R(5)=3DR(4)+683=3D3415 >>>> | | DAGRank(R(5)) =3D 13 >>>> +-------+ >>>> >>>> From the example, you can see R(n) is a 2-byte integer, and DAGRank >>>> is always the higher byte of the 2byte integer, because minHopRankIncr= ease >>>> =3D 256. >>>> >>>> If set JoinPriority =3D DAGRank, then it is possible JoinPriority> 0x= 3f >>>> (although it unlikely happens often), out of its range. >>>> If set JoinPriority[5:0] =3D DAGRank[7:2], (Is it your suggestion?), a >>>> new node may found many existing nodes with same JoinPriority in recei= ved >>>> EB. In another word, the JoinPriority can not provide information abou= t >>>> preferring joining. Right? >>>> >>>> I haven't had good solution for it. So, I hope the range 0x00~0x3f is >>>> not a "MUST" in IEEE802.15.4e. >>>> >>>> What do you think? >>>> Qin >>>> >>>> >>>> >>>> >>>> On Sat, Sep 28, 2013 at 2:30 AM, Xavier Vilajosana Guillen < >>>> xvilajosana@eecs.berkeley.edu> wrote: >>>> >>>>> Hi Qin, >>>>> >>>>> after thinking a little bit on that maybe we can use the higher byte >>>>> of the rank for that. that is rank>>8, the higher byte is a monotoni= cally >>>>> increasing counter. As each hop is <<8 (due to minhopRankIncrease) we= can >>>>> have the sense of higher join priority as higher the rank. >>>>> >>>>> In addition having if we have the limitation of 0x3F, this means that >>>>> we will support Join priorities up to 0x3F that translated to ranks a= re >>>>> 0x3F<<8 (big number) .. >>>>> >>>>> just thoughts... >>>>> X >>>>> >>>>> >>>>> On Fri, Sep 27, 2013 at 10:30 AM, Qin Wang wro= te: >>>>> >>>>>> Hi Thomas, >>>>>> >>>>>> I think with OF0 the DAGRank is uint8. But, in the Table 52b of >>>>>> IEEE802.15.4e, the range of Join Priority is 0x00~0x3f. If the range= is a >>>>>> "MUST", we have to have a function mapping a DAGRank in 0x00~0xff to= a >>>>>> JoinPriority in 0x00~0x3f. Correct? >>>>>> >>>>>> Would you please confirm with some expertise in IEEE802.15.4e if >>>>>> the range 0x00~0x3f is a MUST or not? >>>>>> >>>>>> Thanks >>>>>> Qin >>>>>> >>>>>> _______________________________________________ >>>>>> 6tsch mailing list >>>>>> 6tsch@ietf.org >>>>>> https://www.ietf.org/mailman/listinfo/6tsch >>>>>> >>>>>> >>>>> >>>> >>> >> > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --047d7b67360432858b04e776ce46 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Qin,

    In IEEE802.15.4e, Table 52b indeed sho= ws a range of 0x00-0x3f. Yet, Figure 48ee shows a 1-byte field. I'll go= on a little hunt to understand where those 2 bits went, will let you know.=

    =
    Thomas


    On Sat, Sep = 28, 2013 at 12:08 AM, Pascal Thubert (pthubert) <pthubert@cisco.com&g= t; wrote:
    Agreed

    Say the rule is as discussed earlier:
    Rank =3D sigma (etx*2*mh) where mh is 256.
    Thus dagrank <=3D 2*sigma(etx)

    Let us be honest, even with an etx of 3 this gives us 8 hops, which le= aves very little chances to deliver in time.

    For a classical mesh we are shooting at 4 or 5 hops so 3f should be en= ough.

    For long and static lines, we may resort to hop count though.=A0
    =A0
    What do others think?

    Pascal

    Le 27 sept. 2013 =E0 23:34, "Xavier Vilajosana Guillen" <xvilajosana@e= ecs.berkeley.edu> a =E9crit=A0:

    Hi Qin,

    well the rank is 2Byte, what i suggest is to divide it by 256 and take= this number as Join Priority (1Byte). If this number is bigger than 0x3F t= hen the Join Priority becomes 0x3F. Of course this if 0x3F is a strict requ= irement.

    regards,
    Xavi


    On Fri, Sep 27, 2013 at 2:20 PM, Qin Wang <qinwang@berke= ley.edu> wrote:
    Xavi,

    You mean:
    if rank <=3D 0x3f then JoinPriority=3Drank else JoinPriority=3D0x3f=

    Correct? I think it could be a solution.

    Thanks
    Qin


    On Sat, Sep 28, 2013 at 5:07 AM, Xavier Vilajosa= na Guillen <xvilajosana@eecs.berkeley.edu> wrote:
    Hi Qin,=A0

    my suggestion is to use=A0JoinPriority[5:0] =3D (rank[15:8]&0x3F) or 0x3F if bigg= er -- having a 0x3F would be like having INFINITE Join Priority as in the c= ase of RPL with ranks>65535.

    would that= not work?
    X


    On Fri, Sep 27, 2013 at 1:44 PM, Qin Wang <qinwang@berke= ley.edu> wrote:
    Xavi,

    Let's take the example in your draft to see what the problem is. P= lease point out if I'm wrong.
    +-------+
    =A0 =A0 =A0| =A0 0 =A0 | R(0)=3D0
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(0)) =3D 0
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 1 =A0 | R(1)=3DR(0)+683=3D683
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(1)) =3D 2
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 2 =A0 | R(2)=3DR(1)+683=3D1366
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(2)) =3D 5
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 3 =A0 | R(3)=3DR(2)+683=3D2049
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(3)) =3D 8
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 4 =A0 | R(4)=3DR(3)+683=3D2732
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(4)) =3D 10
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0 =A0 =A0|
    =A0 =A0 =A0+-------+
    =A0 =A0 =A0| =A0 5 =A0 | R(5)=3DR(4)+683=3D3415
    =A0 =A0 =A0| =A0 =A0 =A0 | DAGRank(R(5)) =3D 13
    =A0 =A0 =A0+-------+

    From the example, you can see R(n) is a 2-byte integer, and DAGRank is= always the higher byte of the 2byte integer, because=A0minHopRankIncrease = =3D 256.

    If set JoinPriority =3D DAGRank, then it is possible JoinPriority> = 0x3f (although it unlikely happens often), out of its range.=A0
    If set JoinPriority[5:0] =3D DAGRank[7:2], (Is it your suggestion?), a= new node may found many existing nodes with same JoinPriority in received = EB. In another word, the JoinPriority can not provide information about pre= ferring joining. Right?

    I haven't had good solution for it. So, I hope the range 0x00~0x3f= is not a "MUST" in IEEE802.15.4e.

    What =A0do you think?
    Qin=A0




    On Sat, Sep 28, 2013 at 2:30 AM, Xavier Vilajosa= na Guillen <xvilajosana@eecs.berkeley.edu> wrote:
    Hi Qin,

    after thinking a little bit on that maybe we can use the higher byte of the= rank for that. that is=A0 rank>>8, the higher byte is a monotonicall= y increasing counter. As each hop is <<8 (due to minhopRankIncrease) = we can have the sense of higher join priority as higher the rank.

    In addition having if we have the limitation of 0x3F, this means that we wi= ll support Join priorities up to 0x3F that translated to ranks are 0x3F<= <8 (big number) ..

    just thoughts...
    X


    On Fri, Sep 27, 2013 at 10:30 AM, Qin Wang <qinwang@berkeley.edu> wrote:
    Hi Thomas,

    I think with OF0 the DAGRank is uint8. But, in the Table 52b of IEEE80= 2.15.4e, the range of Join Priority is 0x00~0x3f. If the range is a "M= UST", we have to have a function mapping a DAGRank in 0x00~0xff to a J= oinPriority in 0x00~0x3f. Correct?

    Would you please confirm with some expertise in IEEE802.15.4e if the r= ange 0x00~0x3f is a MUST or not?

    Thanks
    Qin

    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch






    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    https://www.ietf.org/mailman/listinfo/6tsch

    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch


    --047d7b67360432858b04e776ce46-- From rsudhaak@cisco.com Mon Sep 30 20:38:12 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3DE1B21F9A50 for <6tsch@ietfa.amsl.com>; Mon, 30 Sep 2013 20:38:12 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -10.598 X-Spam-Level: X-Spam-Status: No, score=-10.598 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Cb-bhrs6S73I for <6tsch@ietfa.amsl.com>; Mon, 30 Sep 2013 20:38:04 -0700 (PDT) Received: from rcdn-iport-9.cisco.com (rcdn-iport-9.cisco.com [173.37.86.80]) by ietfa.amsl.com (Postfix) with ESMTP id F3E6921F923D for <6tsch@ietf.org>; Mon, 30 Sep 2013 20:38:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=15812; q=dns/txt; s=iport; t=1380598683; x=1381808283; h=from:to:subject:date:message-id:references:in-reply-to: mime-version; bh=zxxM6qzCD0gokGY0FbpS04NgAYx7BhwgkFJubSPTpZ4=; b=HOC3je7HFDVd9efhsbXt4UKkcmC54fMwUZYhLu8sE3I3yo83kLI11QbX 9kv8hK/UEkh/T6gAtO3cUoBvnj1gVXQIysZ/02gLwXDlyFI2x5qp+gIGu M3/5GZ7FPX26PmtqnjSPv+89d6n2hLsgyiLJOA5h+D5FAZ62pZxfV66/g Q=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AjIFACxDSlKtJXHA/2dsb2JhbABAFwOCQ0Q4UoMpvVoXgR4WbQeCJgEBBCMKKBEjAgEPGwoEDAYCAgIwJAEBAQEDG4d+DDaqLIQljh6OI30tCxEHglI1gQMDhU+TX4kYhzKCUlKCKg X-IronPort-AV: E=Sophos;i="4.90,1011,1371081600"; d="scan'208,217";a="263474172" Received: from rcdn-core2-5.cisco.com ([173.37.113.192]) by rcdn-iport-9.cisco.com with ESMTP; 01 Oct 2013 03:38:03 +0000 Received: from xhc-aln-x01.cisco.com (xhc-aln-x01.cisco.com [173.36.12.75]) by rcdn-core2-5.cisco.com (8.14.5/8.14.5) with ESMTP id r913c1BY027447 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for <6tsch@ietf.org>; Tue, 1 Oct 2013 03:38:01 GMT Received: from xmb-rcd-x04.cisco.com ([169.254.8.47]) by xhc-aln-x01.cisco.com ([173.36.12.75]) with mapi id 14.02.0318.004; Mon, 30 Sep 2013 22:38:01 -0500 From: "Raghuram Sudhaakar (rsudhaak)" To: "6tsch@ietf.org" <6tsch@ietf.org> Thread-Topic: Info and Data model draft Thread-Index: Ac6989x4YM9gvtrsT5eRTmMIpHszfQAY8Oe/ Date: Tue, 1 Oct 2013 03:38:00 +0000 Message-ID: <2C3A8CAFDCAFCA41B8BF705CD9471C5B186058C0@xmb-rcd-x04.cisco.com> References: <2C3A8CAFDCAFCA41B8BF705CD9471C5B1860506F@xmb-rcd-x04.cisco.com> In-Reply-To: <2C3A8CAFDCAFCA41B8BF705CD9471C5B1860506F@xmb-rcd-x04.cisco.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.21.146.57] Content-Type: multipart/alternative; boundary="_000_2C3A8CAFDCAFCA41B8BF705CD9471C5B186058C0xmbrcdx04ciscoc_" MIME-Version: 1.0 Subject: [6tsch] Info and Data model draft X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Oct 2013 03:38:12 -0000 --_000_2C3A8CAFDCAFCA41B8BF705CD9471C5B186058C0xmbrcdx04ciscoc_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable All, Below is webex setup for - Tue, Oct 01 at 8am PST =96 to discuss the scope = and contents of the Information and Data Model draft. 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    Below= is webex setup for - Tue, Oct 01 at 8am PST =96 to discuss the scope and c= ontents of the Information and Data Model draft. Please feel free to join.<= /span>

    -ragh= uram

     
    When: Tuesday, October 01, 2013 8:00 AM-9:0= 0 AM. (UTC-08:00) Pacific Time (US & Canada)
    Where: webex

    *~*~*~*~*~*~*~*~*~*
    All
    Below the proposed agenda for tomorrow's meetin= g

    Agenda =96 Define table of contents and outline= of the content

    1) Raghuram/Pouria =96 present pre-draft ToC
    2) Discuss ToC
    3) Define contents of each section

    Please let me know if anything has been missed.=

    -raghuram


    +---+---+---+---+---+--= -+---+---+---+---+---+
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    Meeting Number: 201431543
    Meeting Password: 6tisch

    -----------------------------------------------= --------
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    2. Enter the meeting password: 6tisch
    3. Click 'Join Now'.
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    ALERT:Toll-Free Dial Restrictions for (408) and= (919) Area Codes
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    The affected toll free numbers are: (866) 432-9= 903 for the San Jose/Milpitas area and (866) 349-3520 for the RTP area.

    Please dial the local access number for your ar= ea from the list below:
    - San Jose/Milpitas (408) area: 525-6800
    - RTP (919) area: 392-3330

    -----------------------------------------------= --------
    To join the teleconference only
    -----------------------------------------------= --------
    1. Dial into Cisco WebEx (view all Global Acces= s Numbers at http://cisco.com/en/US/about/doin= g_business/conferencing/index.html)
    2. Follow the prompts to enter the Meeting Numb= er (listed above) or Access Code followed by the # sign.

    San Jose, CA: +1.408.525.6800
    RTP: +1.919.392.3330

    US/Canada: +1.866.432.9903
    United Kingdom: +44.20.8824.0117

    India: +91.80.4350.1111
    Germany: +49.619.6773.9002

    Japan: +81.3.5763.9394
    China: +86.10.8515.5666


    CCP:+14085256800x201431543#

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R0VSO1JFTEFURUQ9U1RBUlQ6LVBUMTVNDQpFTkQ6VkFMQVJNDQpFTkQ6VkVWRU5UDQpFTkQ6VkNB TEVOREFSDQo= --_000_2C3A8CAFDCAFCA41B8BF705CD9471C5B186058C0xmbrcdx04ciscoc_-- From twatteyne@gmail.com Mon Sep 30 20:58:59 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C6E9921F995E for <6tsch@ietfa.amsl.com>; Mon, 30 Sep 2013 20:58:59 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.596 X-Spam-Level: X-Spam-Status: No, score=-1.596 tagged_above=-999 required=5 tests=[AWL=0.381, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id NCcyQXf9SWgF for <6tsch@ietfa.amsl.com>; Mon, 30 Sep 2013 20:58:58 -0700 (PDT) Received: from mail-pa0-x232.google.com (mail-pa0-x232.google.com [IPv6:2607:f8b0:400e:c03::232]) by ietfa.amsl.com (Postfix) with ESMTP id 6F6DF21F997D for <6tsch@ietf.org>; Mon, 30 Sep 2013 20:58:58 -0700 (PDT) Received: by mail-pa0-f50.google.com with SMTP id fb1so6744969pad.23 for <6tsch@ietf.org>; Mon, 30 Sep 2013 20:58:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:from:date:message-id:subject:to:content-type; bh=2JiGpbcZzsILzyvbV47+XUHij/R9brqgiWh6vN9EF2s=; b=mYJ5AjAnKqphN9XvlwxF4e83sAmT/e1BgIMFPtAgWr7Hkmt17PllyNnPFe+/KPtuin jrfc/9Syh7p4ekfRKSiof2vWzpbxOPlxrlHID8lMPeFaVBapcWke2BOVS0LOEeH7PV+j 3NmTqYDDVH9zUmKJeLSawueFYBgy5K0oAKiqyXXmOT2FaygApzsionpXRpvcUdNlfw/W GoB/u3bpG3d//KduI4LeFTHSpArTE1Q6xVaEj5+Jlges1rvS88WWguon+w2oD/G48Ah4 piER5dBQObFsXbJLsJ/IVdWEFw+9KpKcattXH9UakUCjC9utTc0Jq312iz9Y0qXu7zoV fsgA== X-Received: by 10.66.178.143 with SMTP id cy15mr31708012pac.105.1380599938090; Mon, 30 Sep 2013 20:58:58 -0700 (PDT) MIME-Version: 1.0 Sender: twatteyne@gmail.com Received: by 10.66.147.193 with HTTP; Mon, 30 Sep 2013 20:58:37 -0700 (PDT) From: Thomas Watteyne Date: Mon, 30 Sep 2013 20:58:37 -0700 X-Google-Sender-Auth: 0mDRYu7_GHPYPVLkTRvn4Q4LHqw Message-ID: To: 6TSCH <6tsch@ietf.org> Content-Type: multipart/alternative; boundary=047d7bdc9326e30d7d04e7a5f800 Subject: [6tsch] comments unpublished draft-vilajosana-6tisch-minimal-00.txt X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Oct 2013 03:58:59 -0000 --047d7bdc9326e30d7d04e7a5f800 Content-Type: text/plain; charset=ISO-8859-1 Xavi, Kris, Per the last 6TiSCH webex on Friday, I reviewed the unpublished version of draft-vilajosana-6tisch-minimal-00, in particular the file https://bitbucket.org/6tsch/draft-vilajosana-6tsch-basic/src/3ead236bdc563747fea826e8d632fd99f3bb868e/draft-vilajosana-6tisch-minimal-00.txt?at=master. You will find the remarks below. Thomas ---- Remarks: 1. In the abstract, you might consider indicating that the minimal configuration can be used for more than interop testing. Example rewording: "This minimal mode of operation can be used during network bootstrap, as a fallback mode of operation when no dynamic scheduling solution is available or functioning, or during early interoperability testing and development". 2. Similarly, I would highlight these cases also in the introduction, maybe providing one sentence per case. A reference to draft-ietf-roll-rpl-industrial-applicability might be appropriate at that point. 3. "[IEEE802154e] provides a mechanism whereby the details of slotframe length, timeslot timing, and channel hopping pattern are communicated to a node during initial synchronization". I believe the EB can also indicate the cells to use. 4. "the radio of the nodes remains off." You might want to indicate that those 95 timeslots are available for a dynamic scheduling solution. 5. in the "Minimal schedule overview" figure, why "TxRxS" and not simply "TxRx"? 6. "All scheduled cells in the minimal schedule are configured as Hard cells [I-D.watteyne-6tsch-tsch-lln-context][I-D.draft-wang-6tsch-6top] since reallocation is not considered in that simple approach." That's not strictly true if we consider a dynamic scheduling approach can schedule the remaining 95 slots. Maybe specify that the cell allocated by this document are hard cells, but that this does not necessarily apply to any additional cells scheduled by a dynamic scheduling solution. 7. Unscheduled cells should not occupy any memory -> Unscheduled cells SHOULD NOT occupy any memory 8. the transmissions is considered failed at the MAC layer, and the upper layer needs to be notified -> the transmissions is considered failed and the MAC layer MUST notify the upper layer 9. 2.4. Time Slot timing is redundant with draft-watteyne-6tsch-tsch-lln-context. We could consider moving the diagram and text to that draft, and leave just the table in this draft, together with a reference to the draft-watteyne-6tsch-tsch-lln-context. Thoughts welcome. 10. "this document recommends to hard-code the different durations to the values listed below." This it not strictly true, since the intro says that one can dynamically learn through the EB. Please say the same in this text. 11. it is recommended to sent EBs at least once every 10s -> a mote SHOULD send an EB every 10s 12. EBs must be sent with the Beacon IEEE802.15.4 frame type -> EBs MUST be sent with the Beacon IEEE802.15.4 frame type 13. "this document recommends that they carry the following Information Elements (IEs)". Since nodes can either hard-code or learn on the fly, I believe the list of IEs is a MUST. 14. Section 3 contains the value of all fields. Please specify that this is redundant with [IEEE802.15.4e] and [I-D.watteyne-6tsch-tsch-lln-contex], and provided here for clarity. 15. In 3.1.2., what's the value of Join Priority? 16. "each node SHOULD indicate the schedule in each EB through a Frame and Cell IE". Per discussion above, maybe MUST? 17. please give each neighbor statistics a name, e.g. numTx 18. "Neighbour address". Which address? EUI, IPv6, both? 19. Per last call use timestamp rather than ASN in "Timestamp when that neighbour was heard for the last time. This can be based on the ASN counter or any other time base." 20. "Connectivity statistics (RSSI, LQI, etc),". I would simply RSSI, since LQI is not well defined. 21. "Each node selects at least one time parent amongst its known neighbours." I suggest "Each node MUST select a time source neighbor among the neighbors in its RPL routing parent set" 22. PAN coordinator is an old term. Let's use the term DAG root. 23. "it is NOT allowed" -> "is MUST NOT" (NOT cannot be used alone) 24. "start advertising the network" -> "send EBs" 25. I would remove "e.g RSSI when the EB has been received as no other metrics are available at that moment" 26. Strictly speaking, "time parent" does not exist. Please use the term "time source neighbor" 27. "A backup time parent can also be selected (as required by RPL and described in Section 7.1 following the same rule)." It is unclear how that backup is used. What you could say is that, if connectivity to the time source neighbor is lost, a new time source neighbor MUST be chosen among the neighbor in the RPL routing parent set. 28. I understand "Optionally, a node [...] selected" is about hysteresis. As is, it is not clear what exactly is defined. I would simply state that "some form of hysteresis SHOULD be implemented to avoid frequent changes in time source neighbors" 29. "Lower-layer packets " -> "Frames generated by the MAC layer (e.g. EBs and ACK)" 30. "A minimal TSCH configuration [...] tests" is WAY to verbose. Please reword by something as simple as "Nodes in the network MUST use the RPL routing protocol". 31. Same thing for the long intro to Section 7.1. 32. In 7.1.1, I would not repeat RFC6552, just state that a mote MUST use step_of_rank as 2*ETX 33. "This information can be extracted from the neighbours information described in Section 5.1." Please replace by equation based on counters. 34. I would keep 7.1.2, which helps clarify. 35. Same for 7.2.2, please remove repeats, and list simply the configuration. 36. If possible, please federate the discussion about hysteresis for both the routing and time source selection, since it's one and the same thing. 37. What's the recommended value for PARENT_SWITCH_THRESHOLD? Minor remarks (*a* means add, **a** means remove, please use Ctrl+F to find): 1. Number of time slots per **Slotframe** *slotframe* 2. Amendament->Amendment 3. Number of EB**s** cells 4. These EBs *sent to the broadcast MAC address and* are not acknowledged 5. Per the [IEEE802154e] **TSCH** standard 6. options below that -> options below, which 7. set,* *in 8. in presence of collisions it uses the back-off mechanism defined in [IEEE802154e] -> the back-off mechanism defined in [IEEE802154e] is used to resolve contention 9. node (RX), and a MAC -> node (RX). A MAC 10. fully to **be able to** configure 11. Size Slotframe (b32-b47) = 0x65 *(101)* 12. "Slot Number (2B) = from (0x00 to 0x05)" why the parenthesis? 13. Time Synch*ronization* information 14. "but it should at least contain the following information, for each neighbour" -> "it SHOULD contain the following information for each neighbor" 15. RPL objective function (OF) -> RPL Objective Function (OF) 16. "parent, uses the Join Priority" -> parent, it uses the Join Priority 17. of **the** [IEEE802154e] 18. i.e*.* EBs sent 19. When a nodes Joins -> When a node joins 20. " The later aims to avoid" -> "The latter avoids" 21. match*es* RPL topology 22. it is allowed to send Enhanced Beacons -> it SHOULD send Enhanced Beacons 23. In case of a node receiving EBs -> In case a node receives EBs 24. a*n* IEEE802.15.4 25. Watteyene -> Watteyne administrative remark: 1. the repository is now called draft-vilajosana-6tsch-basic. Please rename to draft-vilajosana-6tisch-minimal. You might want to give people 48h notice in case they have it cloned. 2. please use the bitbucket issue tracker built into your repository to track these remarks. Remarks about the XML file: 1. While I reviewed the TXT version, I took the liberty to look at the XML file. 2. For homogeneity with the other 6TiSCH drafts, please replace tabs by 3 spaces, especially in figures. This should also fix indentation issues. 3. The draft-wang-6tsch-6top is published. Please replace the explicit reference to "I-D.draft-wang-6tsch-6top" accordingly. This will also ensure the correct I-D version. --047d7bdc9326e30d7d04e7a5f800 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    Xavi, Kris,

    Per the last 6TiSCH webex o= n Friday, I reviewed the unpublished version of=A0draft-vilajosana-6tisch-m= inimal-00, in particular the file=A0https://bitbucket.org/6t= sch/draft-vilajosana-6tsch-basic/src/3ead236bdc563747fea826e8d632fd99f3bb86= 8e/draft-vilajosana-6tisch-minimal-00.txt?at=3Dmaster. You will find th= e remarks below.

    Thomas

    ----

    Remarks:
    1. In the abstract, you might consider indic= ating that the minimal configuration can be used for more than interop test= ing. Example rewording: "This minimal mode of operation can be used du= ring network bootstrap, as a fallback mode of operation when=A0no dynamic s= cheduling solution is available or functioning, or during early interoperab= ility testing and development".
    2. Similarly, I would highlight these cases also in the introduction,= maybe providing one sentence per case. A reference to=A0draft-ietf-roll-rp= l-industrial-applicability might be appropriate at that point.
    3. "[IEEE802154e] provides a mechanism whereby the details of slotframe l= ength, timeslot timing, and channel hopping pattern are communicated to a n= ode during initial synchronization". I believe the EB can also indicat= e the cells to use.
    4. "the radio of the nodes remains off." You might want to = indicate that those 95 timeslots are available for a dynamic scheduling sol= ution.
    5. in the "Minimal schedule overview" figure, why= "TxRxS" and not simply "TxRx"?
    6. "All scheduled cells in the minimal schedule are configured a= s Hard cells [I-D.watteyne-6tsch-tsch-lln-context][I-D.draft-wang-6tsch-6to= p] since reallocation is not considered in that simple approach." That= 's not strictly true if we consider a dynamic scheduling approach can s= chedule the remaining 95 slots. Maybe specify that the cell allocated by th= is document are hard cells, but that this does not necessarily apply to any= additional cells scheduled by a dynamic scheduling solution.
    7. Unscheduled cells should not occupy any memory ->=A0Unscheduled= cells SHOULD NOT occupy any memory
    8. the transmissions is consid= ered failed at the MAC layer, and the upper layer needs to be notified ->= ; the transmissions is considered failed and the MAC layer MUST notify the = upper layer
    9. 2.4. =A0Time Slot timing is redundant with=A0draft-watteyne-6tsch-= tsch-lln-context. We could consider moving the diagram and text to that dra= ft, and leave just the table in this draft, together with a reference to th= e draft-watteyne-6tsch-tsch-lln-context. Thoughts welcome.
    10. "this document recommends to hard-code the different duration= s to the values listed below." This it not strictly true, since the in= tro says that one can dynamically learn through the EB. Please say the same= in this text.
    11. it is recommended to sent EBs at least=A0once every 10s -> a mo= te SHOULD send an EB every 10s
    12. EBs must be sent with the Beacon= IEEE802.15.4 frame type ->=A0EBs MUST be sent with the Beacon IEEE802.1= 5.4 frame type
    13. "this document recommends that they carry the following Infor= mation Elements (IEs)". Since nodes can either hard-code or learn on t= he fly, I believe the list of IEs is a MUST.
    14. Section 3 contains= the value of all fields. Please specify that this is redundant with [IEEE8= 02.15.4e] and=A0[I-D.watteyne-6tsch-tsch-lln-contex], and provided here for= clarity.
    15. In=A03.1.2., what's the value of=A0Join Priority?
    16. = "each node SHOULD indicate the schedule in each EB through a Frame and= Cell IE". Per discussion above, maybe MUST?
    17. please give e= ach neighbor statistics a name, e.g. numTx
    18. "Neighbour address". Which address? EUI, IPv6, both?
      =
    19. Per last call use timestamp rather than ASN in "Timestamp whe= n that neighbour was heard for the last time. This can be based on the ASN = counter or any other time base."
    20. "Connectivity statistics (RSSI, LQI, etc),". I would sim= ply RSSI, since LQI is not well defined.
    21. "Each node select= s at least one time parent amongst its known neighbours." I suggest=A0= "Each node MUST select a time source neighbor among the neighbors in i= ts RPL routing parent set"
    22. PAN coordinator is an old term. Let's use the term DAG root.
    23. "it is NOT allowed" -> "is MUST NOT" (NOT= cannot be used alone)
    24. "start advertising the network"= ; ->=A0"send EBs"
    25. I would remove "e.g RSSI when the EB has been received as no = other metrics are available at that moment"
    26. Strictly speak= ing, "time parent" does not exist. Please use the term "time= source neighbor"
    27. "A backup time parent can also be selected (as required by RP= L and described in Section 7.1 following the same rule)." It is unclea= r how that backup is used. What you could say is that, if connectivity to t= he time source neighbor is lost, a new time source neighbor MUST be chosen = among the neighbor in the RPL routing parent set.
    28. I understand "Optionally, a node [...] selected" is abou= t hysteresis. As is, it is not clear what exactly is defined. I would simpl= y state that "some form of hysteresis SHOULD be implemented to avoid f= requent changes in time source neighbors"
    29. "Lower-layer packets=A0" -> "Frames generated by= the MAC layer (e.g. EBs and ACK)"
    30. "A minimal TSCH co= nfiguration [...] tests" is WAY to verbose. Please reword by something= as simple as "Nodes in the network MUST use the RPL routing protocol&= quot;.
    31. Same thing for the long intro to Section 7.1.
    32. In 7.1.1= , I would not repeat RFC6552, just state that a mote MUST use=A0step_of_ran= k as=A02*ETX
    33. "This information can be extracted from the n= eighbours information described in Section 5.1." Please replace by equ= ation based on counters.
    34. I would keep 7.1.2, which helps clarify.
    35. Same for 7.2.= 2, please remove repeats, and list simply the configuration.
    36. If= possible, please federate the discussion about hysteresis for both the rou= ting and time source selection, since it's one and the same thing.
    37. What's the recommended value for=A0PARENT_SWITCH_THRESHOLD?
    Minor remarks (*a* means add, **a** means remove, ple= ase use Ctrl+F to find):
    1. Number of time slots per **S= lotframe** *slotframe*
    2. Amendament->Amendment
    3. Number of EB**s** cells
    4. These EBs *sent to the broadcast MAC address and* are not acknowledg= ed
    5. Per the [IEEE802154e] **TSCH** standard
    6. options = below that ->=A0options below, which
    7. set,* *in
    8. in presence of collisions it uses the back-o= ff mechanism defined in [IEEE802154e] -> the=A0back-off mechanism define= d in [IEEE802154e] is used to resolve contention
    9. node (RX), and= a MAC ->=A0node (RX). A MAC
    10. fully to **be able to** configure
    11. Size Slotframe (b32-= b47) =3D 0x65 *(101)*
    12. "Slot Number (2B) =3D from (0x00 to = 0x05)" why the parenthesis?
    13. Time Synch*ronization* informa= tion
    14. "but it should at least contain the following information, fo= r each neighbour" -> "it SHOULD contain the following informat= ion for each neighbor"
    15. RPL objective function (OF) ->= =A0RPL Objective Function (OF)
    16. "parent, uses the Join Priority" ->=A0parent, it uses= the Join Priority
    17. of **the** [IEEE802154e]
    18. i.e*.* = EBs sent
    19. =A0When a nodes Joins -> When a node joins
    20. "=A0The later aims to avoid" -> "The latter avoids&qu= ot;
    21. match*es* RPL topology
    22. it is allowed to send En= hanced Beacons ->=A0it SHOULD send Enhanced Beacons
    23. In case = of a node receiving EBs ->=A0In case a node receives EBs
    24. a*n* IEEE802.15.4
    25. Watteyene ->=A0Watteyne
      26. <= /ol>
    administrative remark:
    1. the repository = is now called=A0draft-vilajosana-6tsch-basic. Please rename to=A0draft-vila= josana-6tisch-minimal. You might want to give people 48h notice in case the= y have it cloned.
    2. please use the bitbucket issue tracker built into your repository = to track these remarks.
    Remarks about the XML file:=
    1. While I reviewed the TXT version, I took the liberty to = look at the XML file.
    2. For homogeneity with the other 6TiSCH drafts, please replace tabs = by 3 spaces, especially in figures. This should also fix indentation issues= .
    3. The=A0draft-wang-6tsch-6top is published. Please replace the = explicit reference to=A0"I-D.draft-wang-6tsch-6top" accordingly. = This will also ensure the correct I-D version.
    --047d7bdc9326e30d7d04e7a5f800-- From xvilajosana@berkeley.edu Mon Sep 30 21:01:24 2013 Return-Path: X-Original-To: 6tsch@ietfa.amsl.com Delivered-To: 6tsch@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2121521F9A99 for <6tsch@ietfa.amsl.com>; Mon, 30 Sep 2013 21:01:24 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.501 X-Spam-Level: X-Spam-Status: No, score=-2.501 tagged_above=-999 required=5 tests=[AWL=0.475, BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id jP2fcPlPAFrJ for <6tsch@ietfa.amsl.com>; Mon, 30 Sep 2013 21:01:20 -0700 (PDT) Received: from mail-pb0-f41.google.com (mail-pb0-f41.google.com [209.85.160.41]) by ietfa.amsl.com (Postfix) with ESMTP id B431E21F9AA1 for <6tsch@ietf.org>; Mon, 30 Sep 2013 21:01:07 -0700 (PDT) Received: by mail-pb0-f41.google.com with SMTP id rp2so6516594pbb.14 for <6tsch@ietf.org>; Mon, 30 Sep 2013 21:01:07 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=aIBCyL+5xRoBat0xHw1JxDpiA+b1DF4cf1vyNcoTGsA=; b=dyCdT4WE4kq2FOG46N1xC2jaBydFHag30Eax2vGqgjN9Z3hLx2qSOEuq5r54gCwMza ieKlafhFM4T4/6H5kwfSGPk8YW4VRsUt7kMojLOAorJLgR3gn/9My6z4x8Qx/YWpg7Np YbQKufcfEKHZ/iqQopb4le9eW8Ytdc2dUNZnTOs4N3JIFr0CVm1vtt36C4Gbi37BF2aw +9/UYQjVEbVwLRRXRjARHXNIVlw2hA16eyqLb2sQxwXJnED57on9pyn9559yiGN7Wt3i DoFoWqOooDicExog9Zxf6UWCk+Bcs5cLv73ahdde55GOeSBEV44l8Q3I5c8zkTZ8XQwK t5+g== X-Gm-Message-State: ALoCoQm5rLGHtXH1QmyssxT0miU2U7v9sXLqdLBHwXVsc4xrfrQArjzlzJfw3my9cxXgcfX3GHyb MIME-Version: 1.0 X-Received: by 10.68.215.38 with SMTP id of6mr27283206pbc.14.1380600067389; Mon, 30 Sep 2013 21:01:07 -0700 (PDT) Received: by 10.70.34.44 with HTTP; Mon, 30 Sep 2013 21:01:07 -0700 (PDT) In-Reply-To: References: Date: Mon, 30 Sep 2013 21:01:07 -0700 Message-ID: From: Xavier Vilajosana Guillen To: Thomas Watteyne Content-Type: multipart/alternative; boundary=001a1134663898057d04e7a600a1 Cc: 6TSCH <6tsch@ietf.org> Subject: Re: [6tsch] comments unpublished draft-vilajosana-6tisch-minimal-00.txt X-BeenThere: 6tsch@ietf.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: xvilajosana@eecs.berkeley.edu List-Id: "Discuss link layer model for Deterministic IPv6 over the TSCH mode of IEEE 802.15.4e, and impacts on RPL and 6LoWPAN such as resource allocation" <6tsch.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Oct 2013 04:01:24 -0000 --001a1134663898057d04e7a600a1 Content-Type: text/plain; charset=ISO-8859-1 thanks Thomas for the exhaustive review! I will address your comments tomorrow. regards, Xavi On Mon, Sep 30, 2013 at 8:58 PM, Thomas Watteyne wrote: > Xavi, Kris, > > Per the last 6TiSCH webex on Friday, I reviewed the unpublished version > of draft-vilajosana-6tisch-minimal-00, in particular the file > https://bitbucket.org/6tsch/draft-vilajosana-6tsch-basic/src/3ead236bdc563747fea826e8d632fd99f3bb868e/draft-vilajosana-6tisch-minimal-00.txt?at=master. > You will find the remarks below. > > Thomas > > ---- > > Remarks: > > 1. In the abstract, you might consider indicating that the minimal > configuration can be used for more than interop testing. Example rewording: > "This minimal mode of operation can be used during network bootstrap, as a > fallback mode of operation when no dynamic scheduling solution is available > or functioning, or during early interoperability testing and development". > 2. Similarly, I would highlight these cases also in the introduction, > maybe providing one sentence per case. A reference > to draft-ietf-roll-rpl-industrial-applicability might be appropriate at > that point. > 3. "[IEEE802154e] provides a mechanism whereby the details of > slotframe length, timeslot timing, and channel hopping pattern are > communicated to a node during initial synchronization". I believe the EB > can also indicate the cells to use. > 4. "the radio of the nodes remains off." You might want to indicate > that those 95 timeslots are available for a dynamic scheduling solution. > 5. in the "Minimal schedule overview" figure, why "TxRxS" and not > simply "TxRx"? > 6. "All scheduled cells in the minimal schedule are configured as Hard > cells [I-D.watteyne-6tsch-tsch-lln-context][I-D.draft-wang-6tsch-6top] > since reallocation is not considered in that simple approach." That's not > strictly true if we consider a dynamic scheduling approach can schedule the > remaining 95 slots. Maybe specify that the cell allocated by this document > are hard cells, but that this does not necessarily apply to any additional > cells scheduled by a dynamic scheduling solution. > 7. Unscheduled cells should not occupy any memory -> Unscheduled cells > SHOULD NOT occupy any memory > 8. the transmissions is considered failed at the MAC layer, and the > upper layer needs to be notified -> the transmissions is considered failed > and the MAC layer MUST notify the upper layer > 9. 2.4. Time Slot timing is redundant > with draft-watteyne-6tsch-tsch-lln-context. We could consider moving the > diagram and text to that draft, and leave just the table in this draft, > together with a reference to the draft-watteyne-6tsch-tsch-lln-context. > Thoughts welcome. > 10. "this document recommends to hard-code the different durations to > the values listed below." This it not strictly true, since the intro says > that one can dynamically learn through the EB. Please say the same in this > text. > 11. it is recommended to sent EBs at least once every 10s -> a mote > SHOULD send an EB every 10s > 12. EBs must be sent with the Beacon IEEE802.15.4 frame type -> EBs > MUST be sent with the Beacon IEEE802.15.4 frame type > 13. "this document recommends that they carry the following > Information Elements (IEs)". Since nodes can either hard-code or learn on > the fly, I believe the list of IEs is a MUST. > 14. Section 3 contains the value of all fields. Please specify that > this is redundant with [IEEE802.15.4e] > and [I-D.watteyne-6tsch-tsch-lln-contex], and provided here for clarity. > 15. In 3.1.2., what's the value of Join Priority? > 16. "each node SHOULD indicate the schedule in each EB through a Frame > and Cell IE". Per discussion above, maybe MUST? > 17. please give each neighbor statistics a name, e.g. numTx > 18. "Neighbour address". Which address? EUI, IPv6, both? > 19. Per last call use timestamp rather than ASN in "Timestamp when > that neighbour was heard for the last time. This can be based on the ASN > counter or any other time base." > 20. "Connectivity statistics (RSSI, LQI, etc),". I would simply RSSI, > since LQI is not well defined. > 21. "Each node selects at least one time parent amongst its known > neighbours." I suggest "Each node MUST select a time source neighbor among > the neighbors in its RPL routing parent set" > 22. PAN coordinator is an old term. Let's use the term DAG root. > 23. "it is NOT allowed" -> "is MUST NOT" (NOT cannot be used alone) > 24. "start advertising the network" -> "send EBs" > 25. I would remove "e.g RSSI when the EB has been received as no other > metrics are available at that moment" > 26. Strictly speaking, "time parent" does not exist. Please use the > term "time source neighbor" > 27. "A backup time parent can also be selected (as required by RPL and > described in Section 7.1 following the same rule)." It is unclear how that > backup is used. What you could say is that, if connectivity to the time > source neighbor is lost, a new time source neighbor MUST be chosen among > the neighbor in the RPL routing parent set. > 28. I understand "Optionally, a node [...] selected" is about > hysteresis. As is, it is not clear what exactly is defined. I would simply > state that "some form of hysteresis SHOULD be implemented to avoid frequent > changes in time source neighbors" > 29. "Lower-layer packets " -> "Frames generated by the MAC layer (e.g. > EBs and ACK)" > 30. "A minimal TSCH configuration [...] tests" is WAY to verbose. > Please reword by something as simple as "Nodes in the network MUST use the > RPL routing protocol". > 31. Same thing for the long intro to Section 7.1. > 32. In 7.1.1, I would not repeat RFC6552, just state that a mote MUST > use step_of_rank as 2*ETX > 33. "This information can be extracted from the neighbours information > described in Section 5.1." Please replace by equation based on counters. > 34. I would keep 7.1.2, which helps clarify. > 35. Same for 7.2.2, please remove repeats, and list simply the > configuration. > 36. If possible, please federate the discussion about hysteresis for > both the routing and time source selection, since it's one and the same > thing. > 37. What's the recommended value for PARENT_SWITCH_THRESHOLD? > > Minor remarks (*a* means add, **a** means remove, please use Ctrl+F to > find): > > 1. Number of time slots per **Slotframe** *slotframe* > 2. Amendament->Amendment > 3. Number of EB**s** cells > 4. These EBs *sent to the broadcast MAC address and* are not > acknowledged > 5. Per the [IEEE802154e] **TSCH** standard > 6. options below that -> options below, which > 7. set,* *in > 8. in presence of collisions it uses the back-off mechanism defined in > [IEEE802154e] -> the back-off mechanism defined in [IEEE802154e] is used to > resolve contention > 9. node (RX), and a MAC -> node (RX). A MAC > 10. fully to **be able to** configure > 11. Size Slotframe (b32-b47) = 0x65 *(101)* > 12. "Slot Number (2B) = from (0x00 to 0x05)" why the parenthesis? > 13. Time Synch*ronization* information > 14. "but it should at least contain the following information, for > each neighbour" -> "it SHOULD contain the following information for each > neighbor" > 15. RPL objective function (OF) -> RPL Objective Function (OF) > 16. "parent, uses the Join Priority" -> parent, it uses the Join > Priority > 17. of **the** [IEEE802154e] > 18. i.e*.* EBs sent > 19. When a nodes Joins -> When a node joins > 20. " The later aims to avoid" -> "The latter avoids" > 21. match*es* RPL topology > 22. it is allowed to send Enhanced Beacons -> it SHOULD send Enhanced > Beacons > 23. In case of a node receiving EBs -> In case a node receives EBs > 24. a*n* IEEE802.15.4 > 25. Watteyene -> Watteyne > > administrative remark: > > 1. the repository is now called draft-vilajosana-6tsch-basic. Please > rename to draft-vilajosana-6tisch-minimal. You might want to give people > 48h notice in case they have it cloned. > 2. please use the bitbucket issue tracker built into your repository > to track these remarks. > > Remarks about the XML file: > > 1. While I reviewed the TXT version, I took the liberty to look at the > XML file. > 2. For homogeneity with the other 6TiSCH drafts, please replace tabs > by 3 spaces, especially in figures. This should also fix indentation issues. > 3. The draft-wang-6tsch-6top is published. Please replace the explicit > reference to "I-D.draft-wang-6tsch-6top" accordingly. This will also ensure > the correct I-D version. > > > _______________________________________________ > 6tsch mailing list > 6tsch@ietf.org > https://www.ietf.org/mailman/listinfo/6tsch > > --001a1134663898057d04e7a600a1 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
    thanks Thomas for the exhaustive review! I will address yo= ur comments tomorrow.

    regards,
    Xavi


    On Mon, Sep 30, 201= 3 at 8:58 PM, Thomas Watteyne <watteyne@eecs.berkeley.edu>= wrote:
    Xavi, Kris,

    <= div>Per the last 6TiSCH webex on Friday, I reviewed the unpublished version= of=A0draft-vilajosana-6tisch-minimal-00, in particular the file=A0https://bitbucket.org/6tsch/draft-vilajosana-6tsc= h-basic/src/3ead236bdc563747fea826e8d632fd99f3bb868e/draft-vilajosana-6tisc= h-minimal-00.txt?at=3Dmaster. You will find the remarks below.

    Thomas

    ----

    Remarks:
    1. In the abstract, you might consider indic= ating that the minimal configuration can be used for more than interop test= ing. Example rewording: "This minimal mode of operation can be used du= ring network bootstrap, as a fallback mode of operation when=A0no dynamic s= cheduling solution is available or functioning, or during early interoperab= ility testing and development".
    2. Similarly, I would highlight these cases also in the introduction,= maybe providing one sentence per case. A reference to=A0draft-ietf-roll-rp= l-industrial-applicability might be appropriate at that point.
    3. "[IEEE802154e] provides a mechanism whereby the details of slotframe l= ength, timeslot timing, and channel hopping pattern are communicated to a n= ode during initial synchronization". I believe the EB can also indicat= e the cells to use.
    4. "the radio of the nodes remains off." You might want to = indicate that those 95 timeslots are available for a dynamic scheduling sol= ution.
    5. in the "Minimal schedule overview" figure, why= "TxRxS" and not simply "TxRx"?
    6. "All scheduled cells in the minimal schedule are configured a= s Hard cells [I-D.watteyne-6tsch-tsch-lln-context][I-D.draft-wang-6tsch-6to= p] since reallocation is not considered in that simple approach." That= 's not strictly true if we consider a dynamic scheduling approach can s= chedule the remaining 95 slots. Maybe specify that the cell allocated by th= is document are hard cells, but that this does not necessarily apply to any= additional cells scheduled by a dynamic scheduling solution.
    7. Unscheduled cells should not occupy any memory ->=A0Unscheduled= cells SHOULD NOT occupy any memory
    8. the transmissions is consid= ered failed at the MAC layer, and the upper layer needs to be notified ->= ; the transmissions is considered failed and the MAC layer MUST notify the = upper layer
    9. 2.4. =A0Time Slot timing is redundant with=A0draft-watteyne-6tsch-= tsch-lln-context. We could consider moving the diagram and text to that dra= ft, and leave just the table in this draft, together with a reference to th= e draft-watteyne-6tsch-tsch-lln-context. Thoughts welcome.
    10. "this document recommends to hard-code the different duration= s to the values listed below." This it not strictly true, since the in= tro says that one can dynamically learn through the EB. Please say the same= in this text.
    11. it is recommended to sent EBs at least=A0once every 10s -> a mo= te SHOULD send an EB every 10s
    12. EBs must be sent with the Beacon= IEEE802.15.4 frame type ->=A0EBs MUST be sent with the Beacon IEEE802.1= 5.4 frame type
    13. "this document recommends that they carry the following Infor= mation Elements (IEs)". Since nodes can either hard-code or learn on t= he fly, I believe the list of IEs is a MUST.
    14. Section 3 contains= the value of all fields. Please specify that this is redundant with [IEEE8= 02.15.4e] and=A0[I-D.watteyne-6tsch-tsch-lln-contex], and provided here for= clarity.
    15. In=A03.1.2., what's the value of=A0Join Priority?
    16. = "each node SHOULD indicate the schedule in each EB through a Frame and= Cell IE". Per discussion above, maybe MUST?
    17. please give e= ach neighbor statistics a name, e.g. numTx
    18. "Neighbour address". Which address? EUI, IPv6, both?
      =
    19. Per last call use timestamp rather than ASN in "Timestamp whe= n that neighbour was heard for the last time. This can be based on the ASN = counter or any other time base."
    20. "Connectivity statistics (RSSI, LQI, etc),". I would sim= ply RSSI, since LQI is not well defined.
    21. "Each node select= s at least one time parent amongst its known neighbours." I suggest=A0= "Each node MUST select a time source neighbor among the neighbors in i= ts RPL routing parent set"
    22. PAN coordinator is an old term. Let's use the term DAG root.
    23. "it is NOT allowed" -> "is MUST NOT" (NOT= cannot be used alone)
    24. "start advertising the network"= ; ->=A0"send EBs"
    25. I would remove "e.g RSSI when the EB has been received as no = other metrics are available at that moment"
    26. Strictly speak= ing, "time parent" does not exist. Please use the term "time= source neighbor"
    27. "A backup time parent can also be selected (as required by RP= L and described in Section 7.1 following the same rule)." It is unclea= r how that backup is used. What you could say is that, if connectivity to t= he time source neighbor is lost, a new time source neighbor MUST be chosen = among the neighbor in the RPL routing parent set.
    28. I understand "Optionally, a node [...] selected" is abou= t hysteresis. As is, it is not clear what exactly is defined. I would simpl= y state that "some form of hysteresis SHOULD be implemented to avoid f= requent changes in time source neighbors"
    29. "Lower-layer packets=A0" -> "Frames generated by= the MAC layer (e.g. EBs and ACK)"
    30. "A minimal TSCH co= nfiguration [...] tests" is WAY to verbose. Please reword by something= as simple as "Nodes in the network MUST use the RPL routing protocol&= quot;.
    31. Same thing for the long intro to Section 7.1.
    32. In 7.1.1= , I would not repeat RFC6552, just state that a mote MUST use=A0step_of_ran= k as=A02*ETX
    33. "This information can be extracted from the n= eighbours information described in Section 5.1." Please replace by equ= ation based on counters.
    34. I would keep 7.1.2, which helps clarify.
    35. Same for 7.2.= 2, please remove repeats, and list simply the configuration.
    36. If= possible, please federate the discussion about hysteresis for both the rou= ting and time source selection, since it's one and the same thing.
    37. What's the recommended value for=A0PARENT_SWITCH_THRESHOLD?
    Minor remarks (*a* means add, **a** means remove, ple= ase use Ctrl+F to find):
    1. Number of time slots per **S= lotframe** *slotframe*
    2. Amendament->Amendment
    3. Number of EB**s** cells
    4. These EBs *sent to the broadcast MAC address and* are not acknowledg= ed
    5. Per the [IEEE802154e] **TSCH** standard
    6. options = below that ->=A0options below, which
    7. set,* *in
    8. in presence of collisions it uses the back-o= ff mechanism defined in [IEEE802154e] -> the=A0back-off mechanism define= d in [IEEE802154e] is used to resolve contention
    9. node (RX), and= a MAC ->=A0node (RX). A MAC
    10. fully to **be able to** configure
    11. Size Slotframe (b32-= b47) =3D 0x65 *(101)*
    12. "Slot Number (2B) =3D from (0x00 to = 0x05)" why the parenthesis?
    13. Time Synch*ronization* informa= tion
    14. "but it should at least contain the following information, fo= r each neighbour" -> "it SHOULD contain the following informat= ion for each neighbor"
    15. RPL objective function (OF) ->= =A0RPL Objective Function (OF)
    16. "parent, uses the Join Priority" ->=A0parent, it uses= the Join Priority
    17. of **the** [IEEE802154e]
    18. i.e*.* = EBs sent
    19. =A0When a nodes Joins -> When a node joins
    20. "=A0The later aims to avoid" -> "The latter avoids&qu= ot;
    21. match*es* RPL topology
    22. it is allowed to send En= hanced Beacons ->=A0it SHOULD send Enhanced Beacons
    23. In case = of a node receiving EBs ->=A0In case a node receives EBs
    24. a*n* IEEE802.15.4
    25. Watteyene ->=A0Watteyne
      26. <= /ol>
    administrative remark:
    1. the repository = is now called=A0draft-vilajosana-6tsch-basic. Please rename to=A0draft-vila= josana-6tisch-minimal. You might want to give people 48h notice in case the= y have it cloned.
    2. please use the bitbucket issue tracker built into your repository = to track these remarks.
    Remarks about the XML file:=
    1. While I reviewed the TXT version, I took the liberty to = look at the XML file.
    2. For homogeneity with the other 6TiSCH drafts, please replace tabs = by 3 spaces, especially in figures. This should also fix indentation issues= .
    3. The=A0draft-wang-6tsch-6top is published. Please replace the = explicit reference to=A0"I-D.draft-wang-6tsch-6top" accordingly. = This will also ensure the correct I-D version.

    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch


    --001a1134663898057d04e7a600a1--


    On Wed, Sep 11, 2013 at 1:17 AM, Thomas Watteyne <watteyne@eecs= .berkeley.edu> wrote:
    Qin,

    I think w= e all largely agree. What follows is some context to make entirely sure we&= #39;re talking about the same thing. It's written in -vv mode, so please be patient.

    The following illustrates the different interactions.

    =A0 +---= --+=A0=A0 =A0 =A0 =A0=A0+--------------------+= =A0 =A0= =A0=A0=A0= =A0=A0+--------------------+
    =A0 | PCE = |<=3D=3D(3)=3D=3D>| =A0 =A0=A0=A06top ME =A0^= =A0 =A0| =A0 =A0=A0=A0=A0=A0 | =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0|
    =A0 +-----= +=A0=A0 =A0 =A0 =A0=A0+---------------|----+= =A0 =A0=A0=A0= =A0=A0 +--------------------+
    =A0 =A0 = =A0=A0 = =A0=A0= =A0 =A0= =A0=A0=A0 =A0 | = =A0 =A0 =A0 CoAP =A0 =A0| =A0 =A0|=A0 =A0=A0<= span style=3D"font-family:'courier new',monospace">=A0=A0=A0=A0 | =A0 =A0 =A0 CoAP =A0 =A0 = =A0 =A0 |
    =A0 =A0 = =A0=A0 = =A0 =A0= =A0 =A0= =A0=A0 =A0=A0+-------------- | ---+= =A0 =A0 =A0=A0= =A0=A0=A0+--------------------+
    =A0 =A0 = =A0=A0 = =A0 =A0= =A0=A0 = =A0=A0=A0=A0 | = =A0 =A0 =A0 =A0 =A0. =A0 (1) =A0 |=A0 =A0=A0<= /span>=A0=A0=A0=A0 | =A0 =A0 =A0 =A0 = =A0. =A0 =A0 =A0 =A0 |
    =A0 = =A0 =A0= =A0 =A0 =A0=A0= =A0 =A0= =A0=A0= =A0 | =A0 =A0 =A0 =A0 =A0. =A0 =A0| =A0 =A0|= =A0 =A0= =A0=A0=A0= =A0=A0 | =A0 =A0 =A0 = =A0 =A0. =A0 =A0 =A0 =A0 |
    =A0 =A0 = =A0=A0 = =A0 =A0=A0=A0=A0 =A0=A0=A0=A0+-------------- | ---+=A0 =A0 =A0 =A0 =A0+--------------------= +
    =A0 =A0 =A0=A0 =A0 =A0=A0=A0=A0= =A0 | =A0 =A0 =A0 6top =A0 =A0V =A0 =A0|<=3D=3D(2)=3D=3D>| =A0 =A0 =A0 6top =A0 =A0 =A0 = =A0 |
    =A0 =A0 = =A0=A0 = =A0 =A0=A0=A0=A0 =A0=A0=A0=A0+--------------------+=A0 =A0=A0=A0=A0=A0=A0 +--------------------+
    =A0 =A0 =A0=A0 =A0 =A0=A0=A0=A0 =A0=A0= =A0 | IEEE802.15.4e TSCH |=A0 =A0=A0=A0=A0=A0 =A0 = =A0=A0 = =A0 =A0=A0 =A0=A0 =A0=A0=A0+--------------------+=A0 =A0=A0=A0= =A0=A0=A0 +--------------------+
    http://tools.ietf.org/html/draft-wang-6tsch-6top-00= =A0and defines=A0<= font color=3D"#0000ff">(1)=A0the hooks for an upper layer to int= eract with the TSCH schedule and=A0(2)=A0a negotiation mechanism betwe= en two nodes to manage soft cells allocation.=A0(1)=A0is u= sed by the 6top management entity (6top ME).=A0(2)=A0is used by neighb= or nodes to manage soft cells.

    In a centralized case, the PCE talks to the 6top = ME over some application-level protocol (3). While this is= still in debate, CoAP looks like an interesting choice (Raghu and Xavi wil= l be leading a discussion about CoAP during this Friday's call).

    About the different interactions depicted above:
    <= div>
    • The discussion about the flows we had last week deals with (3). We identified 5 flows, and started discussing the content= s of the report flows, as captured in=A0https://bitbucket= .org/6tsch/meetings/wiki/report_flow_contents.
    • The interaction marked=A0(1)=A0is inside the mote. Sin= ce it does not involve sending bytes over the air, I would argue that it is= implementation-specific, and out of scope of what we want to standardize. = And while=A0http://tools.ietf.org/html/draft-wang-6tsch-= 6top-00#section-2.4=A0defines a set of commands, an implementation will= be compliant as long as it trigger the correct "over-the-air" be= havior.
    • Since we are working on the centralized case first, and that it makes m= ost sense to use hard cells in the centralized case, (2)=A0hasn't = received much attention lately. I believe that we should keep what's de= fined in=A0http://tools.ietf.org/html/draft-wang-6tsch-6top-00= =A0and resume working on it when we tackle the distributed case.
    Coming back to our discussion about formats, I expect a pac= ket of interaction to look=A0(3)=A0something like:

    +------...-------+------+---------+
    | several header | Co= AP | payload |
    +------...-------+--= ----+---------+

    CoAP will give us "services" suc= h as resource and URIs, method (GET/POST/PUT/DELETE) and optional confirmab= le messages. Using those simply means that the 6top ME will not have to re-= define those "services", hence that the format of the=A0pa= yload=A0gets simpler. CoAP is also "application-agnostic&qu= ot;, i.e. it just transports the=A0payload=A0between two e= nd-points, without knowing anything about what that=A0payload<= /b>=A0contains.

    The distributed case is a different problem. We are tal= king about using protocols such as RSVP/NSIS, which are more than just &quo= t;transporting" data, since they come with precise interaction models.= Given this, I would argue that we will not be able to reuse the exact same= =A0payload=A0format. That being said, it we opt for flexib= le encoding of generic information such as "a request for bandwidth&qu= ot;, or "a statistic about cell usage", we might be able to reuse= those as building blocks whenever needed by RSVP/NSIS (or a simpler versio= n thereof). I believe in the JSON/BSON/CBOR path we are following, and that= it will give us the re-usability we are looking for.

    Is this in line with what you're thinking?

    Thomas

    On Tue, Sep 10, 2013 at 5:48 AM, Qin Wang <qinwang@berkeley.edu>= wrote:
    Hi Thomas and Maria Rita,

    <= div> I totally agree with you that we should focus on centralized approach in th= e current step. But I cannot see it is very difficult to cover distributed = case. Maybe I miss something.

    To be clear, in my mind, the exchanged messages in dist= ributed case is that between 6top and some Reservation protocol like RSVP/N= SIS in upper layer. In another word, it is about exchanging messages inside= a node, instead of exchanging messages among neighbors. I don't unders= tand why for different upper layer Reservation protocol, the control flows = from/to 6top could be different significantly. Can you explain a little mor= e?

    Thanks
    Qin



    =A0
    <= /div>


    On Tue, Sep 10, 2013 at 2:45 PM, Maria R= ita PALATTELLA <maria-rita.palattella@uni.lu> wro= te:

    Qin, I agree too about defining the formats in a way that we can= reuse them for the distributed case. But, for the time being, I would be f= ocused on the centralized approach and try to find a solution for it. And then, move to the distribu= ted one (that for sure will raise other issues up).

    Let=92s try to solve the problems one by one!

    Maria Rita

    =A0

    From: 6tsch-bounces@ietf.o= rg [mailto:= 6tsch-bounces@ietf.org] On Behalf Of Thomas Watteyne
    Sent: Tuesday, September 10, 2013 6:24 AM
    To: 6tsch@ietf.o= rg
    Subject: Re: [6tsch] Is generic management method possible?

    =A0

    Qin,

    =A0

    I fully agree that being able to reuse some formats in the distributed c= ase is important. The question about the exact protocol to use for negotiat= ion between neighbors in the distributed case is a very broad one. It is to= o early to discuss that. We can, however, keep the distributed case in mind when proposing fo= rmats.

    =A0

    Thomas

    =A0

    On Mon, Sep 9, 2013 at 1:57 PM, Qin Wang <qinwang@berkeley.edu> wrote:

    Hi All,

    =A0

    In the previous discussion, we have figured out 5 control flows between = PCE and node, which were expressed in the context of centralized case. Obvi= ously, it will be great if the messages in those identified control flows a= re generic, suitable for both centralized and distributed case. During last Friday's call, = it was mentioned but is still a open issue. I propose to continue the discu= ssion in this thread.

    =A0

    Comparing the role of PCE in centralized case,I think RSVP/NSIS will pla= y similar role in distributed case. In another word, instead of exchanging = message with PCE via a network, 6top Management Entity will exchange messag= e with a Reservation Entity like RSVP/NSIS inside the same node. The question is if it is possi= ble to use same design in the two cases. =A0(I'm not expert on RSVP and= NSIS, please input your opinions).

    =A0

    Firstly, I think the contents of messages in the centralized and distrib= uted case are overlap in a big portion. For example, both of them need to s= end action flow, both of them need statistics data, and so on.

    =A0

    Secondly, in terms of Message Exchange, the two cases are similar. The o= nly difference is, in centralized case, the control messages are carried by= CoAP as payload; and in distributed case, the control messages are "s= ent" via internal pointer.=A0

    =A0

    Make sense?

    =A0

    Qin

    =A0

    =A0


    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch

    =A0


    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch




    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch


    Qin,

    I think we all largely agree. What follo= ws is some context to make entirely sure we're talking about the same t= hing. It's written in -vv = mode, so please be patient.

    The following illustrates the different interactions.

    =A0 +---= --+=A0=A0 =A0 =A0 =A0=A0+--------------------+= =A0 =A0= =A0=A0=A0= =A0=A0+--------------------+
    =A0 | PCE = |<=3D=3D(3)=3D=3D>| =A0 =A0=A0=A06top ME =A0^= =A0 =A0| =A0 =A0=A0=A0=A0=A0 | =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0|
    =A0 +-----= +=A0=A0 =A0 =A0 =A0=A0+---------------|----+= =A0 =A0=A0=A0= =A0=A0 +--------------------+
    =A0 =A0 = =A0=A0 = =A0=A0= =A0 =A0= =A0=A0=A0 =A0 | = =A0 =A0 =A0 CoAP =A0 =A0| =A0 =A0|=A0 =A0=A0<= span style=3D"font-family:'courier new',monospace">=A0=A0=A0=A0 | =A0 =A0 =A0 CoAP =A0 =A0 = =A0 =A0 |
    =A0 =A0 = =A0=A0 = =A0 =A0= =A0 =A0= =A0=A0 =A0=A0+-------------- | ---+= =A0 =A0 =A0=A0= =A0=A0=A0+--------------------+
    =A0 =A0 = =A0=A0 = =A0 =A0= =A0=A0 = =A0=A0=A0=A0 | = =A0 =A0 =A0 =A0 =A0. =A0 (1) =A0 |=A0 =A0=A0<= /span>=A0=A0=A0=A0 | =A0 =A0 =A0 =A0 = =A0. =A0 =A0 =A0 =A0 |
    =A0 = =A0 =A0= =A0 =A0 =A0=A0= =A0 =A0= =A0=A0= =A0 | =A0 =A0 =A0 =A0 =A0. =A0 =A0| =A0 =A0|= =A0 =A0= =A0=A0=A0= =A0=A0 | =A0 =A0 =A0 = =A0 =A0. =A0 =A0 =A0 =A0 |
    =A0 =A0 = =A0=A0 = =A0 =A0=A0=A0=A0 =A0=A0=A0=A0+-------------- | ---+=A0 =A0 =A0 =A0 =A0+--------------------= +
    =A0 =A0 =A0=A0 =A0 =A0=A0=A0=A0= =A0 | =A0 =A0 =A0 6top =A0 =A0V =A0 =A0|<=3D=3D(2)=3D=3D>| =A0 =A0 =A0 6top =A0 =A0 =A0 = =A0 |
    =A0 =A0 = =A0=A0 = =A0 =A0=A0=A0=A0 =A0=A0=A0=A0+--------------------+=A0 =A0=A0=A0=A0=A0=A0 +--------------------+
    =A0 =A0 =A0=A0 =A0 =A0=A0=A0=A0 =A0=A0= =A0 | IEEE802.15.4e TSCH |=A0 =A0=A0=A0=A0=A0 =A0 = =A0=A0 = =A0 =A0=A0 =A0=A0 =A0=A0=A0+--------------------+=A0 =A0=A0=A0= =A0=A0=A0 +--------------------+
    http://tools.ietf.org/html/draft-wang-6tsch-6top-00= =A0and defines=A0<= font color=3D"#0000ff">(1)=A0the hooks for an upper layer to int= eract with the TSCH schedule and=A0(2)=A0a negotiation mechanism betwe= en two nodes to manage soft cells allocation.=A0(1)=A0is u= sed by the 6top management entity (6top ME).=A0(2)=A0is used by neighb= or nodes to manage soft cells.

    In a centralized case, the PCE talks to the 6top = ME over some application-level protocol (3). While this is= still in debate, CoAP looks like an interesting choice (Raghu and Xavi wil= l be leading a discussion about CoAP during this Friday's call).

    About the different interactions depicted above:
    <= div>
    • The discussion about the flows we had last week deals with (3). We identified 5 flows, and started discussing the content= s of the report flows, as captured in=A0https://bitbucket.org/6tsch/meeting= s/wiki/report_flow_contents.
    • The interaction marked=A0(1)=A0is inside the mote. Sin= ce it does not involve sending bytes over the air, I would argue that it is= implementation-specific, and out of scope of what we want to standardize. = And while=A0http://tools.ietf.org/html/draft-wang-6tsch-6top-00#section-2.= 4=A0defines a set of commands, an implementation will be compliant as l= ong as it trigger the correct "over-the-air" behavior.
    • Since we are working on the centralized case first, and that it makes m= ost sense to use hard cells in the centralized case, (2)=A0hasn't = received much attention lately. I believe that we should keep what's de= fined in=A0http://tools.ietf.org/html/draft-wang-6tsch-6top-00= =A0and resume working on it when we tackle the distributed case.
    Coming back to our discussion about formats, I expect a pac= ket of interaction to look=A0(3)=A0something like:

    +------...-------+------+---------+
    | several header | Co= AP | payload |
    +------...-------+--= ----+---------+

    CoAP will give us "services" suc= h as resource and URIs, method (GET/POST/PUT/DELETE) and optional confirmab= le messages. Using those simply means that the 6top ME will not have to re-= define those "services", hence that the format of the=A0pa= yload=A0gets simpler. CoAP is also "application-agnostic&qu= ot;, i.e. it just transports the=A0payload=A0between two e= nd-points, without knowing anything about what that=A0payload<= /b>=A0contains.

    The distributed case is a different problem. We are tal= king about using protocols such as RSVP/NSIS, which are more than just &quo= t;transporting" data, since they come with precise interaction models.= Given this, I would argue that we will not be able to reuse the exact same= =A0payload=A0format. That being said, it we opt for flexib= le encoding of generic information such as "a request for bandwidth&qu= ot;, or "a statistic about cell usage", we might be able to reuse= those as building blocks whenever needed by RSVP/NSIS (or a simpler versio= n thereof). I believe in the JSON/BSON/CBOR path we are following, and that= it will give us the re-usability we are looking for.

    Is this in line with what you're thinking?

    Thomas

    On Tue, Sep 10, 2013 at 5:48 AM, Qin Wang <= ;qinwang@berkeley= .edu> wrote:
    Hi Thomas and Maria Rita,

    <= div> I totally agree with you that we should focus on centralized approach in th= e current step. But I cannot see it is very difficult to cover distributed = case. Maybe I miss something.

    To be clear, in my mind, the exchanged messages in dist= ributed case is that between 6top and some Reservation protocol like RSVP/N= SIS in upper layer. In another word, it is about exchanging messages inside= a node, instead of exchanging messages among neighbors. I don't unders= tand why for different upper layer Reservation protocol, the control flows = from/to 6top could be different significantly. Can you explain a little mor= e?

    Thanks
    Qin



    =A0
    <= /div>


    On Tue, Sep 10, 2013 at 2:45 PM, Maria R= ita PALATTELLA <maria-rita.palattella@uni.lu> wro= te:

    Qin, I agree too about defining the formats in a way that we can= reuse them for the distributed case. But, for the time being, I would be f= ocused on the centralized approach and try to find a solution for it. And then, move to the distribu= ted one (that for sure will raise other issues up).

    Let=92s try to solve the problems one by one!

    Maria Rita

    =A0

    From: 6tsch-bounces@ietf.o= rg [mailto:= 6tsch-bounces@ietf.org] On Behalf Of Thomas Watteyne
    Sent: Tuesday, September 10, 2013 6:24 AM
    To: 6tsch@ietf.o= rg
    Subject: Re: [6tsch] Is generic management method possible?

    =A0

    Qin,

    =A0

    I fully agree that being able to reuse some formats in the distributed c= ase is important. The question about the exact protocol to use for negotiat= ion between neighbors in the distributed case is a very broad one. It is to= o early to discuss that. We can, however, keep the distributed case in mind when proposing fo= rmats.

    =A0

    Thomas

    =A0

    On Mon, Sep 9, 2013 at 1:57 PM, Qin Wang <qinwang@berkeley.edu> wrote:

    Hi All,

    =A0

    In the previous discussion, we have figured out 5 control flows between = PCE and node, which were expressed in the context of centralized case. Obvi= ously, it will be great if the messages in those identified control flows a= re generic, suitable for both centralized and distributed case. During last Friday's call, = it was mentioned but is still a open issue. I propose to continue the discu= ssion in this thread.

    =A0

    Comparing the role of PCE in centralized case,I think RSVP/NSIS will pla= y similar role in distributed case. In another word, instead of exchanging = message with PCE via a network, 6top Management Entity will exchange messag= e with a Reservation Entity like RSVP/NSIS inside the same node. The question is if it is possi= ble to use same design in the two cases. =A0(I'm not expert on RSVP and= NSIS, please input your opinions).

    =A0

    Firstly, I think the contents of messages in the centralized and distrib= uted case are overlap in a big portion. For example, both of them need to s= end action flow, both of them need statistics data, and so on.

    =A0

    Secondly, in terms of Message Exchange, the two cases are similar. The o= nly difference is, in centralized case, the control messages are carried by= CoAP as payload; and in distributed case, the control messages are "s= ent" via internal pointer.=A0

    =A0

    Make sense?

    =A0

    Qin

    =A0

    =A0


    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch

    =A0


    _______________________________________________
    6tsch mailing list
    6tsch@ietf.org
    h= ttps://www.ietf.org/mailman/listinfo/6tsch