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From: "Hutton, Andrew" <andrew.hutton@unify.com>
To: "Yanqiang (Michael)" <michael.yan@huawei.com>, "siprec@ietf.org" <siprec@ietf.org>
Thread-Topic: One question about draft-ietf-siprec-architecture
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From internet-drafts@ietf.org  Mon Dec  2 05:12:07 2013
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Subject: [siprec] I-D Action: draft-ietf-siprec-architecture-10.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the SIP Recording Working Group of the IETF.

	Title           : An Architecture for Media Recording using the Session In=
itiation Protocol
	Author(s)       : Andrew Hutton
                          Leon Portman
                          Rajnish Jain
                          Ken Rehor
	Filename        : draft-ietf-siprec-architecture-10.txt
	Pages           : 16
	Date            : 2013-12-02

Abstract:
   Session recording is a critical requirement in many communications
   environments such as call centers and financial trading.  In some of
   these environments, all calls must be recorded for regulatory,
   compliance, and consumer protection reasons.  Recording of a session
   is typically performed by sending a copy of a media stream to a
   recording device.  This document describes architectures for
   deploying session recording solutions in an environment which is
   based on the Session Initiation Protocol (SIP).


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-siprec-architecture

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-siprec-architecture-10

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-siprec-architecture-10


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From andrew.hutton@unify.com  Mon Dec  2 05:49:11 2013
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From simon.farrow@stancilcorp.com  Tue Dec  3 10:32:03 2013
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From: "Simon Farrow" <simon.farrow@stancilcorp.com>
To: <siprec@ietf.org>
Date: Tue, 3 Dec 2013 10:32:13 -0800
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Subject: [siprec] Feedback from NENA ICE-8 Event
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Typically we found SRC where 'forking' the media to the SRS. A call was
setup between a UA and the SRC which was followed by the SRC sending an
INVITE/OK/ACK to the SRS and the media was 'forked' to the SRS.

This worked except for video as a traditional cause of interoperability
problems with video is that parties in a call use different approaches for
video fast update requests. What we witnessed was the SRC may not send the
SRS the original I-Frame as the call was still being setup between the SRC
and SRS but already in progress between the SRC and UA. This was a real
problem if SRC only then sent P-Frames to the SRS. 

In the i3 document the following text was added to help address the issue
but to me this does help the SIPREC specification
"User Agents in the ESInet must support both RFC5104 [160] and RFC5168 [161]
for full frame refresh requests.  The RFC5104 RTCP method is preferred with
fall back to RFC5168 INFO method when the sender does not implement RFC5104"

A couple of thoughts came to mind regarding this issue.

1: Should we state the SRC have a media buffer - I do not think it would be
a problem if sent it as quickly as possible once the session is established
between the SRC and SRS.
2: Should the SRC forward on a RFC5104 RTCP or RFC5168 INFO message sent by
an SRS.


Simon Farrow
Director of Engineering

Stancil Corporation
2644 South Croddy Way
Santa Ana
CA 92704

Tel: 1-714-546-2002 ext 4311
http://www.stancilcorp.com
simon.farrow@stancilcorp.com






From br@brianrosen.net  Tue Dec  3 11:21:11 2013
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From: Brian Rosen <br@brianrosen.net>
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To: Simon Farrow <simon.farrow@stancilcorp.com>
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Cc: siprec@ietf.org
Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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Do we have anything specific about full frame refresh in -protocol?  =
Don=92t remember it.  We probably want the text Simon cites from NENA =
08-003, with some text that says if the frame refresh request mechanism =
on the CS is different from that on the RS then the SRC has to interwork =
them.

We then probably could use an implementation note that states that the =
SRC must buffer video such that if the RS is established after the CS, =
the RS must start with a full I-Frame.

Brian

On Dec 3, 2013, at 1:32 PM, Simon Farrow <simon.farrow@stancilcorp.com> =
wrote:

> Typically we found SRC where 'forking' the media to the SRS. A call =
was
> setup between a UA and the SRC which was followed by the SRC sending =
an
> INVITE/OK/ACK to the SRS and the media was 'forked' to the SRS.
>=20
> This worked except for video as a traditional cause of =
interoperability
> problems with video is that parties in a call use different approaches =
for
> video fast update requests. What we witnessed was the SRC may not send =
the
> SRS the original I-Frame as the call was still being setup between the =
SRC
> and SRS but already in progress between the SRC and UA. This was a =
real
> problem if SRC only then sent P-Frames to the SRS.=20
>=20
> In the i3 document the following text was added to help address the =
issue
> but to me this does help the SIPREC specification
> "User Agents in the ESInet must support both RFC5104 [160] and RFC5168 =
[161]
> for full frame refresh requests.  The RFC5104 RTCP method is preferred =
with
> fall back to RFC5168 INFO method when the sender does not implement =
RFC5104"
>=20
> A couple of thoughts came to mind regarding this issue.
>=20
> 1: Should we state the SRC have a media buffer - I do not think it =
would be
> a problem if sent it as quickly as possible once the session is =
established
> between the SRC and SRS.
> 2: Should the SRC forward on a RFC5104 RTCP or RFC5168 INFO message =
sent by
> an SRS.
>=20
>=20
> Simon Farrow
> Director of Engineering
>=20
> Stancil Corporation
> 2644 South Croddy Way
> Santa Ana
> CA 92704
>=20
> Tel: 1-714-546-2002 ext 4311
> http://www.stancilcorp.com
> simon.farrow@stancilcorp.com
>=20
>=20
>=20
>=20
>=20
> _______________________________________________
> siprec mailing list
> siprec@ietf.org
> https://www.ietf.org/mailman/listinfo/siprec


From henry.lum@genesyslab.com  Tue Dec  3 11:42:26 2013
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From: Henry Lum <Henry.Lum@genesyslab.com>
To: Brian Rosen <br@brianrosen.net>, Simon Farrow <simon.farrow@stancilcorp.com>
Thread-Topic: [siprec] Feedback from NENA ICE-8 Event
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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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The protocol spec mentions the use of FIR for generating a full I-frame in =
section 8.1.7, but I think it should be an implementation issue to have an =
SRC to buffer media to start with a full I-frame in an RS since an SRC is n=
ot always an RTP endpoint. Also some endpoints don't generate I-frames very=
 often; if a CS is not recorded in the beginning of the call but recorded l=
ater during the call, then it's hard to mandate an SRC to buffer media with=
out a recording so that it can generate an I-Frame in the middle of the cal=
l.

Henry

-----Original Message-----
From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Brian Rosen
Sent: December-03-13 2:21 PM
To: Simon Farrow
Cc: siprec@ietf.org
Subject: Re: [siprec] Feedback from NENA ICE-8 Event

Do we have anything specific about full frame refresh in -protocol?  Don't =
remember it.  We probably want the text Simon cites from NENA 08-003, with =
some text that says if the frame refresh request mechanism on the CS is dif=
ferent from that on the RS then the SRC has to interwork them.

We then probably could use an implementation note that states that the SRC =
must buffer video such that if the RS is established after the CS, the RS m=
ust start with a full I-Frame.

Brian

On Dec 3, 2013, at 1:32 PM, Simon Farrow <simon.farrow@stancilcorp.com> wro=
te:

> Typically we found SRC where 'forking' the media to the SRS. A call was
> setup between a UA and the SRC which was followed by the SRC sending an
> INVITE/OK/ACK to the SRS and the media was 'forked' to the SRS.
>=20
> This worked except for video as a traditional cause of interoperability
> problems with video is that parties in a call use different approaches fo=
r
> video fast update requests. What we witnessed was the SRC may not send th=
e
> SRS the original I-Frame as the call was still being setup between the SR=
C
> and SRS but already in progress between the SRC and UA. This was a real
> problem if SRC only then sent P-Frames to the SRS.=20
>=20
> In the i3 document the following text was added to help address the issue
> but to me this does help the SIPREC specification
> "User Agents in the ESInet must support both RFC5104 [160] and RFC5168 [1=
61]
> for full frame refresh requests.  The RFC5104 RTCP method is preferred wi=
th
> fall back to RFC5168 INFO method when the sender does not implement RFC51=
04"
>=20
> A couple of thoughts came to mind regarding this issue.
>=20
> 1: Should we state the SRC have a media buffer - I do not think it would =
be
> a problem if sent it as quickly as possible once the session is establish=
ed
> between the SRC and SRS.
> 2: Should the SRC forward on a RFC5104 RTCP or RFC5168 INFO message sent =
by
> an SRS.
>=20
>=20
> Simon Farrow
> Director of Engineering
>=20
> Stancil Corporation
> 2644 South Croddy Way
> Santa Ana
> CA 92704
>=20
> Tel: 1-714-546-2002 ext 4311
> http://www.stancilcorp.com
> simon.farrow@stancilcorp.com
>=20
>=20
>=20
>=20
>=20
> _______________________________________________
> siprec mailing list
> siprec@ietf.org
> https://www.ietf.org/mailman/listinfo/siprec

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


From br@brianrosen.net  Tue Dec  3 11:51:13 2013
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From: Brian Rosen <br@brianrosen.net>
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References: <003601cef055$fcdde510$f699af30$@stancilcorp.com> <8B9A8111-B741-4DB1-BBD6-8D9D7B41815F@brianrosen.net> <F3005B7CDE1DA5498B794C655CE1641E2BAAD5@GENSJZMBX02.msg.int.genesyslab.com>
To: Henry Lum <Henry.Lum@genesyslab.com>
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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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You MUST start the RS with an I-frame unless you know that every block =
will be refreshed soon.  Since the SRS can=92t manage the timing of the =
RS vs the CS, it has to be up the the SRC to fix it.
We can talk about how much clipping is acceptable, but the SRC has to =
arrange an I-Frame as the first thing in the RS.

I=92d do this by asking for an i-frame as soon as I started establishing =
the RS, and have enough buffering to cover receipt of the I-Frame to the =
RS media flowing.

What would be really hard to handle is a CS that didn=92t implement FIR.

Brian
On Dec 3, 2013, at 2:42 PM, Henry Lum <Henry.Lum@genesyslab.com> wrote:

> The protocol spec mentions the use of FIR for generating a full =
I-frame in section 8.1.7, but I think it should be an implementation =
issue to have an SRC to buffer media to start with a full I-frame in an =
RS since an SRC is not always an RTP endpoint. Also some endpoints don't =
generate I-frames very often; if a CS is not recorded in the beginning =
of the call but recorded later during the call, then it's hard to =
mandate an SRC to buffer media without a recording so that it can =
generate an I-Frame in the middle of the call.
>=20
> Henry
>=20
> -----Original Message-----
> From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Brian Rosen
> Sent: December-03-13 2:21 PM
> To: Simon Farrow
> Cc: siprec@ietf.org
> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>=20
> Do we have anything specific about full frame refresh in -protocol?  =
Don't remember it.  We probably want the text Simon cites from NENA =
08-003, with some text that says if the frame refresh request mechanism =
on the CS is different from that on the RS then the SRC has to interwork =
them.
>=20
> We then probably could use an implementation note that states that the =
SRC must buffer video such that if the RS is established after the CS, =
the RS must start with a full I-Frame.
>=20
> Brian
>=20
> On Dec 3, 2013, at 1:32 PM, Simon Farrow =
<simon.farrow@stancilcorp.com> wrote:
>=20
>> Typically we found SRC where 'forking' the media to the SRS. A call =
was
>> setup between a UA and the SRC which was followed by the SRC sending =
an
>> INVITE/OK/ACK to the SRS and the media was 'forked' to the SRS.
>>=20
>> This worked except for video as a traditional cause of =
interoperability
>> problems with video is that parties in a call use different =
approaches for
>> video fast update requests. What we witnessed was the SRC may not =
send the
>> SRS the original I-Frame as the call was still being setup between =
the SRC
>> and SRS but already in progress between the SRC and UA. This was a =
real
>> problem if SRC only then sent P-Frames to the SRS.=20
>>=20
>> In the i3 document the following text was added to help address the =
issue
>> but to me this does help the SIPREC specification
>> "User Agents in the ESInet must support both RFC5104 [160] and =
RFC5168 [161]
>> for full frame refresh requests.  The RFC5104 RTCP method is =
preferred with
>> fall back to RFC5168 INFO method when the sender does not implement =
RFC5104"
>>=20
>> A couple of thoughts came to mind regarding this issue.
>>=20
>> 1: Should we state the SRC have a media buffer - I do not think it =
would be
>> a problem if sent it as quickly as possible once the session is =
established
>> between the SRC and SRS.
>> 2: Should the SRC forward on a RFC5104 RTCP or RFC5168 INFO message =
sent by
>> an SRS.
>>=20
>>=20
>> Simon Farrow
>> Director of Engineering
>>=20
>> Stancil Corporation
>> 2644 South Croddy Way
>> Santa Ana
>> CA 92704
>>=20
>> Tel: 1-714-546-2002 ext 4311
>> http://www.stancilcorp.com
>> simon.farrow@stancilcorp.com
>>=20
>>=20
>>=20
>>=20
>>=20
>> _______________________________________________
>> siprec mailing list
>> siprec@ietf.org
>> https://www.ietf.org/mailman/listinfo/siprec
>=20
> _______________________________________________
> siprec mailing list
> siprec@ietf.org
> https://www.ietf.org/mailman/listinfo/siprec
>=20


From rmohanr@cisco.com  Tue Dec  3 22:39:21 2013
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From: "Ram Mohan R (rmohanr)" <rmohanr@cisco.com>
To: Michael Smith <msmith@dss-corp.com>, "'Hutton, Andrew'" <andrew.hutton@unify.com>
Thread-Topic: [siprec] IETF 88 - SIPREC Draft Agenda
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Date: Wed, 4 Dec 2013 06:39:13 +0000
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Subject: Re: [siprec] IETF 88 - SIPREC Draft Agenda
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Hi Michael,

Please see inline

-----Original Message-----
From: Michael Smith <msmith@dss-corp.com>
Date: Thursday, 28 November 2013 3:43 AM
To: "'Hutton, Andrew'" <andrew.hutton@unify.com>
Cc: "siprec@ietf.org" <siprec@ietf.org>
Subject: Re: [siprec] IETF 88 - SIPREC Draft Agenda

>I've only gotten one written comment (attached, from Matt Daughtrey of
>Eventide). This may be because of the Thanksgiving holiday - others made
>verbal comments, and I'll keep prodding them.

Thanks for your efforts to get some feedback for the drafts.

>
>Matt's comments reference metadata-13. Perhaps that's a typo - we tested
>against metadata-12. His point is about whether the drafts are clear on
>whether multiple CS could be recorded in one RS. The Call and Incident IDs
>he talks about are NENA specific, and carried in call-info headers, in
>case
>you wonder about that.

The metadata allows a RS to have zero or more CS and so you could have
more than one CS in a RS.

>
>One other comment I heard from many was that the language of the metadata
>drafts was hard to follow, due to usage and grammar issues - but that
>generally you could understand the intent. Cleaning up the language
>without
>changing the intent is doable, and would help. I don't recall anyone
>saying
>they had issues with the protocol draft.

I will get the draft reviewed and edited by a native speaker and fix the
grammar issues in it.

>
>I'll ping the ICE 8 group again next week to provide written feedback
>ASAP.

Thanks,

Ram

>=20
>
>Michael Smith
>Chief Technologist, DSS Corp.
>Ph: 606.877.2788 | Mobile: 606.231.0243
>
>-----Original Message-----
>From: Hutton, Andrew [mailto:andrew.hutton@unify.com]
>Sent: Wednesday, November 27, 2013 12:57 PM
>To: Michael Smith
>Cc: siprec@ietf.org; 'Parthasarathi R'; 'Brian Rosen'
>Subject: RE: [siprec] IETF 88 - SIPREC Draft Agenda
>
>Hi Michael,
>
>Do you have any information on the ICE 8 event relevant to SIPREC that you
>could provide us?
>
>Regards
>Andy
>
>> -----Original Message-----
>> From: Michael Smith [mailto:msmith@dss-corp.com]
>> Sent: 28 October 2013 17:41
>> To: Hutton, Andrew; 'Parthasarathi R'; 'Brian Rosen'
>> Cc: siprec@ietf.org
>> Subject: RE: [siprec] IETF 88 - SIPREC Draft Agenda
>>=20
>> About the NENA interop event (ICE 8) - it is indeed next week. We have
>> about
>> 17 companies that have implemented siprec (either SRC or SRS
>> functionality).
>> We are testing metadata too. I think that those of us who are also on
>> this list will be more than happy to provide feedback based on our own
>> experiences with the drafts.
>>=20
>> I think we're all swamped right now getting ready for the event, so
>> bear with us, and I'm sure we'll have some comments once the smoke has
>> cleared.
>>=20
>> - Michael Smith, ICE 8 Planning Committee chair
>>=20
>> Michael Smith
>> Chief Technologist, DSS Corp.
>> Ph: 606.877.2788 | Mobile: 606.231.0243
>>=20
>> -----Original Message-----
>> From: siprec-bounces@ietf.org [mailto:siprec-bounces@ietf.org] On
>> Behalf Of Hutton, Andrew
>> Sent: Monday, October 28, 2013 1:28 PM
>> To: Parthasarathi R; 'Brian Rosen'
>> Cc: siprec@ietf.org
>> Subject: Re: [siprec] IETF 88 - SIPREC Draft Agenda
>>=20
>> Hi Partha,
>>=20
>> I understand and share your concern on the lack of progress regarding
>> the metadata draft.
>>=20
>> However the following is taken from the minutes of the last IETF
>> meeting in Berlin.
>>=20
>> >Metadata draft needs more review there is no presentation during this
>> meeting on metadata.
>> >Companies implementing SIPREC for NENA are expected to be at an
>> interop
>> event for NG911 implementations scheduled for fall (Nov.?>). 3-4
>> Implementations expected to be there. Brian will ask the implementers
>> for a review. An experienced IETF reviewer is also >needed. Biggest
>> concern is if all necessary semantic are defined.
>> >Targeting interop events to look for reviewers.
>> >- Brian Rosen: NENA (Next Generation 911)
>> >- Charles Eckel: IMTC SIP Parity groups
>> >ACTION: Need to find reviewers for metadata draft.
>>=20
>> The NENA interop event appears to be planned for next week (Same week
>> as
>> IETF88) maybe Brian can update us this.
>>=20
>> The IMTC event will not take place until next May and might not test
>> SIPREC stuff so probably we should not wait for that.
>>=20
>> I would really like to encourage those that have implemented the
>> metadata draft to provide feedback on the SIPREC mailing list.
>>=20
>> Regards
>> Andy (SIPREC Co-Chair).
>>=20
>>=20
>>=20
>> > -----Original Message-----
>> > From: Parthasarathi R [mailto:partha@parthasarathi.co.in]
>> > Sent: 28 October 2013 16:17
>> > To: Hutton, Andrew; 'Brian Rosen'
>> > Cc: 'Ram Mohan R (rmohanr)'; siprec@ietf.org
>> > Subject: RE: [siprec] IETF 88 - SIPREC Draft Agenda
>> >
>> > Hi Andy/Brian,
>> >
>> > I had raised my concern regarding Metadata draft status
>> > (http://www.ietf.org/mail-archive/web/siprec/current/msg03771.html)
>> > as there is no much progress for 1 years 3 months (from last
>> Vancouver
>> > meeting)
>> > without any changes. The multiple SIPREC implementation exists from
>> > different vendors namely ACME, NICE, AudioCodec, ORCx, HP, Broadsoft
>> > (http://www.linkedin.com/groups/Who-is-using-SIPREC-
>> > 4263898.S.176535181)
>> > already. The comments from ACME & NICE are already incorporated in
>> the
>> > latest draft. This clearly indicates that the metadata draft is
>> > matured enough to implement. AFAIK, each implementation would have
>> > gone through the draft carefully before implementing and it shall be
>> > considered as the review. Could you please let us know when is the
>> > plan to start WGLC for the metadata drafts or any other blocking
>> draft
>> > for this draft.
>> >
>> > I'm also interested in knowing whether the new charter will have the
>> > impact in metadata draft. IMO, the new use case has to be considered
>> > as an extension to the metadata drafts.
>> >
>> > Thanks
>> > Partha
>> >
>> > > -----Original Message-----
>> > > From: siprec-bounces@ietf.org [mailto:siprec-bounces@ietf.org] On
>> > > Behalf Of Ram Mohan R (rmohanr)
>> > > Sent: Wednesday, October 23, 2013 9:26 PM
>> > > To: Hutton, Andrew; siprec@ietf.org
>> > > Subject: Re: [siprec] IETF 88 - SIPREC Draft Agenda
>> > >
>> > > The agenda looks great. One thing I would like to hear is -
>> > >
>> > > Discuss on how to progress these two WG drafts:
>> > > http://tools.ietf.org/wg/siprec/draft-ietf-siprec-metadata/
>> > > http://tools.ietf.org/wg/siprec/draft-ietf-siprec-callflows/
>> > >
>> > > We have not had much progress on either of these drafts  for quite
>> > some
>> > > time now due to lack of reviews. Can we get some help here ?
>> > >
>> > > Regards,
>> > > Ram
>> > >
>> > > -----Original Message-----
>> > > From: <Hutton>, Andrew <andrew.hutton@unify.com>
>> > > Date: Wednesday, 23 October 2013 9:08 PM
>> > > To: "siprec@ietf.org" <siprec@ietf.org>
>> > > Subject: [siprec] IETF 88 - SIPREC Draft Agenda
>> > >
>> > > >Hi All,
>> > > >
>> > > >I posted a draft agenda which can be found at:
>> > > >https://datatracker.ietf.org/meeting/88/agenda/siprec/.
>> > > >
>> > > >Please let me have any requests for changes/additions by Sunday
>> > > >27th
>> > > of
>> > > >October.
>> > > >
>> > > >Regards
>> > > >Andy
>> > > >_______________________________________________
>> > > >siprec mailing list
>> > > >siprec@ietf.org
>> > > >https://www.ietf.org/mailman/listinfo/siprec
>> > >
>> > > _______________________________________________
>> > > siprec mailing list
>> > > siprec@ietf.org
>> > > https://www.ietf.org/mailman/listinfo/siprec
>>=20
>> _______________________________________________
>> siprec mailing list
>> siprec@ietf.org
>> https://www.ietf.org/mailman/listinfo/siprec
>


From rmohanr@cisco.com  Tue Dec  3 22:46:26 2013
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From: "Ram Mohan R (rmohanr)" <rmohanr@cisco.com>
To: Brian Rosen <br@brianrosen.net>, Henry Lum <Henry.Lum@genesyslab.com>
Thread-Topic: [siprec] Feedback from NENA ICE-8 Event
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Date: Wed, 4 Dec 2013 06:46:20 +0000
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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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Another way would be to have a persistent RS between SRC and SRS and
record the CS from the beginning. But again Persistent RS is not feasible
in all cases.
I think the best we have today is to have SRC request for I-Frame via FIR
request as soon as RS is setup/being setup. This would still create a
small clip.

Perhaps we need to have some text on what is a acceptable clip.

Regards,
Ram

-----Original Message-----
From: Brian Rosen <br@brianrosen.net>
Date: Wednesday, 4 December 2013 1:21 AM
To: Henry Lum <Henry.Lum@genesyslab.com>
Cc: "siprec@ietf.org" <siprec@ietf.org>
Subject: Re: [siprec] Feedback from NENA ICE-8 Event

>You MUST start the RS with an I-frame unless you know that every block
>will be refreshed soon.  Since the SRS can=B9t manage the timing of the RS
>vs the CS, it has to be up the the SRC to fix it.
>We can talk about how much clipping is acceptable, but the SRC has to
>arrange an I-Frame as the first thing in the RS.
>
>I=B9d do this by asking for an i-frame as soon as I started establishing
>the RS, and have enough buffering to cover receipt of the I-Frame to the
>RS media flowing.
>
>What would be really hard to handle is a CS that didn=B9t implement FIR.
>
>Brian
>On Dec 3, 2013, at 2:42 PM, Henry Lum <Henry.Lum@genesyslab.com> wrote:
>
>> The protocol spec mentions the use of FIR for generating a full I-frame
>>in section 8.1.7, but I think it should be an implementation issue to
>>have an SRC to buffer media to start with a full I-frame in an RS since
>>an SRC is not always an RTP endpoint. Also some endpoints don't generate
>>I-frames very often; if a CS is not recorded in the beginning of the
>>call but recorded later during the call, then it's hard to mandate an
>>SRC to buffer media without a recording so that it can generate an
>>I-Frame in the middle of the call.
>>=20
>> Henry
>>=20
>> -----Original Message-----
>> From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Brian Rosen
>> Sent: December-03-13 2:21 PM
>> To: Simon Farrow
>> Cc: siprec@ietf.org
>> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>>=20
>> Do we have anything specific about full frame refresh in -protocol?
>>Don't remember it.  We probably want the text Simon cites from NENA
>>08-003, with some text that says if the frame refresh request mechanism
>>on the CS is different from that on the RS then the SRC has to interwork
>>them.
>>=20
>> We then probably could use an implementation note that states that the
>>SRC must buffer video such that if the RS is established after the CS,
>>the RS must start with a full I-Frame.
>>=20
>> Brian
>>=20
>> On Dec 3, 2013, at 1:32 PM, Simon Farrow <simon.farrow@stancilcorp.com>
>>wrote:
>>=20
>>> Typically we found SRC where 'forking' the media to the SRS. A call was
>>> setup between a UA and the SRC which was followed by the SRC sending an
>>> INVITE/OK/ACK to the SRS and the media was 'forked' to the SRS.
>>>=20
>>> This worked except for video as a traditional cause of interoperability
>>> problems with video is that parties in a call use different approaches
>>>for
>>> video fast update requests. What we witnessed was the SRC may not send
>>>the
>>> SRS the original I-Frame as the call was still being setup between the
>>>SRC
>>> and SRS but already in progress between the SRC and UA. This was a real
>>> problem if SRC only then sent P-Frames to the SRS.
>>>=20
>>> In the i3 document the following text was added to help address the
>>>issue
>>> but to me this does help the SIPREC specification
>>> "User Agents in the ESInet must support both RFC5104 [160] and RFC5168
>>>[161]
>>> for full frame refresh requests.  The RFC5104 RTCP method is preferred
>>>with
>>> fall back to RFC5168 INFO method when the sender does not implement
>>>RFC5104"
>>>=20
>>> A couple of thoughts came to mind regarding this issue.
>>>=20
>>> 1: Should we state the SRC have a media buffer - I do not think it
>>>would be
>>> a problem if sent it as quickly as possible once the session is
>>>established
>>> between the SRC and SRS.
>>> 2: Should the SRC forward on a RFC5104 RTCP or RFC5168 INFO message
>>>sent by
>>> an SRS.
>>>=20
>>>=20
>>> Simon Farrow
>>> Director of Engineering
>>>=20
>>> Stancil Corporation
>>> 2644 South Croddy Way
>>> Santa Ana
>>> CA 92704
>>>=20
>>> Tel: 1-714-546-2002 ext 4311
>>> http://www.stancilcorp.com
>>> simon.farrow@stancilcorp.com
>>>=20
>>>=20
>>>=20
>>>=20
>>>=20
>>> _______________________________________________
>>> siprec mailing list
>>> siprec@ietf.org
>>> https://www.ietf.org/mailman/listinfo/siprec
>>=20
>> _______________________________________________
>> siprec mailing list
>> siprec@ietf.org
>> https://www.ietf.org/mailman/listinfo/siprec
>>=20
>
>_______________________________________________
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From DAVE.HIGTON@nice.com  Wed Dec  4 00:37:53 2013
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Thread-Topic: [siprec] Feedback from NENA ICE-8 Event
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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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What you're saying is that a video call MUST have video recorded right =
from the start, otherwise it isn't going to work.

Dave

-----Original Message-----
From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Henry Lum
Sent: 03 December 2013 19:42
To: Brian Rosen; Simon Farrow
Cc: siprec@ietf.org
Subject: Re: [siprec] Feedback from NENA ICE-8 Event

The protocol spec mentions the use of FIR for generating a full I-frame =
in section 8.1.7, but I think it should be an implementation issue to =
have an SRC to buffer media to start with a full I-frame in an RS since =
an SRC is not always an RTP endpoint. Also some endpoints don't generate =
I-frames very often; if a CS is not recorded in the beginning of the =
call but recorded later during the call, then it's hard to mandate an =
SRC to buffer media without a recording so that it can generate an =
I-Frame in the middle of the call.

Henry

-----Original Message-----
From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Brian Rosen
Sent: December-03-13 2:21 PM
To: Simon Farrow
Cc: siprec@ietf.org
Subject: Re: [siprec] Feedback from NENA ICE-8 Event

Do we have anything specific about full frame refresh in -protocol?  =
Don't remember it.  We probably want the text Simon cites from NENA =
08-003, with some text that says if the frame refresh request mechanism =
on the CS is different from that on the RS then the SRC has to interwork =
them.

We then probably could use an implementation note that states that the =
SRC must buffer video such that if the RS is established after the CS, =
the RS must start with a full I-Frame.

Brian

On Dec 3, 2013, at 1:32 PM, Simon Farrow <simon.farrow@stancilcorp.com> =
wrote:

> Typically we found SRC where 'forking' the media to the SRS. A call =
was
> setup between a UA and the SRC which was followed by the SRC sending =
an
> INVITE/OK/ACK to the SRS and the media was 'forked' to the SRS.
>=20
> This worked except for video as a traditional cause of =
interoperability
> problems with video is that parties in a call use different approaches =
for
> video fast update requests. What we witnessed was the SRC may not send =
the
> SRS the original I-Frame as the call was still being setup between the =
SRC
> and SRS but already in progress between the SRC and UA. This was a =
real
> problem if SRC only then sent P-Frames to the SRS.=20
>=20
> In the i3 document the following text was added to help address the =
issue
> but to me this does help the SIPREC specification
> "User Agents in the ESInet must support both RFC5104 [160] and RFC5168 =
[161]
> for full frame refresh requests.  The RFC5104 RTCP method is preferred =
with
> fall back to RFC5168 INFO method when the sender does not implement =
RFC5104"
>=20
> A couple of thoughts came to mind regarding this issue.
>=20
> 1: Should we state the SRC have a media buffer - I do not think it =
would be
> a problem if sent it as quickly as possible once the session is =
established
> between the SRC and SRS.
> 2: Should the SRC forward on a RFC5104 RTCP or RFC5168 INFO message =
sent by
> an SRS.
>=20
>=20
> Simon Farrow
> Director of Engineering
>=20
> Stancil Corporation
> 2644 South Croddy Way
> Santa Ana
> CA 92704
>=20
> Tel: 1-714-546-2002 ext 4311
> http://www.stancilcorp.com
> simon.farrow@stancilcorp.com
>=20
>=20
>=20
>=20
>=20
> _______________________________________________
> siprec mailing list
> siprec@ietf.org
> https://www.ietf.org/mailman/listinfo/siprec

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

_______________________________________________
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siprec@ietf.org
https://www.ietf.org/mailman/listinfo/siprec


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From rmohanr@cisco.com  Wed Dec  4 02:39:28 2013
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From: "Ram Mohan R (rmohanr)" <rmohanr@cisco.com>
To: Dave Higton <DAVE.HIGTON@nice.com>, "siprec@ietf.org" <siprec@ietf.org>
Thread-Topic: [siprec] Feedback from NENA ICE-8 Event
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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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I am not sure how we can ensure that video is recorded from start always.
For example if you RS is setup by SRC only after CS is connected (based on
a policy) which is going to be the case practically in most scenarios then
you will not be able to start recording from start.

Ram

-----Original Message-----
From: Dave Higton <DAVE.HIGTON@nice.com>
Date: Wednesday, 4 December 2013 2:06 PM
To: "siprec@ietf.org" <siprec@ietf.org>
Subject: Re: [siprec] Feedback from NENA ICE-8 Event

>What you're saying is that a video call MUST have video recorded right
>from the start, otherwise it isn't going to work.
>
>Dave
>
>-----Original Message-----
>From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Henry Lum
>Sent: 03 December 2013 19:42
>To: Brian Rosen; Simon Farrow
>Cc: siprec@ietf.org
>Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>
>The protocol spec mentions the use of FIR for generating a full I-frame
>in section 8.1.7, but I think it should be an implementation issue to
>have an SRC to buffer media to start with a full I-frame in an RS since
>an SRC is not always an RTP endpoint. Also some endpoints don't generate
>I-frames very often; if a CS is not recorded in the beginning of the call
>but recorded later during the call, then it's hard to mandate an SRC to
>buffer media without a recording so that it can generate an I-Frame in
>the middle of the call.
>
>Henry
>
>-----Original Message-----
>From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Brian Rosen
>Sent: December-03-13 2:21 PM
>To: Simon Farrow
>Cc: siprec@ietf.org
>Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>
>Do we have anything specific about full frame refresh in -protocol?
>Don't remember it.  We probably want the text Simon cites from NENA
>08-003, with some text that says if the frame refresh request mechanism
>on the CS is different from that on the RS then the SRC has to interwork
>them.
>
>We then probably could use an implementation note that states that the
>SRC must buffer video such that if the RS is established after the CS,
>the RS must start with a full I-Frame.
>
>Brian
>
>On Dec 3, 2013, at 1:32 PM, Simon Farrow <simon.farrow@stancilcorp.com>
>wrote:
>
>> Typically we found SRC where 'forking' the media to the SRS. A call was
>> setup between a UA and the SRC which was followed by the SRC sending an
>> INVITE/OK/ACK to the SRS and the media was 'forked' to the SRS.
>>=20
>> This worked except for video as a traditional cause of interoperability
>> problems with video is that parties in a call use different approaches
>>for
>> video fast update requests. What we witnessed was the SRC may not send
>>the
>> SRS the original I-Frame as the call was still being setup between the
>>SRC
>> and SRS but already in progress between the SRC and UA. This was a real
>> problem if SRC only then sent P-Frames to the SRS.
>>=20
>> In the i3 document the following text was added to help address the
>>issue
>> but to me this does help the SIPREC specification
>> "User Agents in the ESInet must support both RFC5104 [160] and RFC5168
>>[161]
>> for full frame refresh requests.  The RFC5104 RTCP method is preferred
>>with
>> fall back to RFC5168 INFO method when the sender does not implement
>>RFC5104"
>>=20
>> A couple of thoughts came to mind regarding this issue.
>>=20
>> 1: Should we state the SRC have a media buffer - I do not think it
>>would be
>> a problem if sent it as quickly as possible once the session is
>>established
>> between the SRC and SRS.
>> 2: Should the SRC forward on a RFC5104 RTCP or RFC5168 INFO message
>>sent by
>> an SRS.
>>=20
>>=20
>> Simon Farrow
>> Director of Engineering
>>=20
>> Stancil Corporation
>> 2644 South Croddy Way
>> Santa Ana
>> CA 92704
>>=20
>> Tel: 1-714-546-2002 ext 4311
>> http://www.stancilcorp.com
>> simon.farrow@stancilcorp.com
>>=20
>>=20
>>=20
>>=20
>>=20
>> _______________________________________________
>> siprec mailing list
>> siprec@ietf.org
>> https://www.ietf.org/mailman/listinfo/siprec
>
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From henry.lum@genesyslab.com  Wed Dec  4 06:11:38 2013
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From: Henry Lum <Henry.Lum@genesyslab.com>
To: "Ram Mohan R (rmohanr)" <rmohanr@cisco.com>, Brian Rosen <br@brianrosen.net>
Thread-Topic: [siprec] Feedback from NENA ICE-8 Event
Thread-Index: Ac7wVdmiG0L5lhiHQ7WoOxMUM8dcKgASgJAAABBZUWD//4WagIAAtxMAgAANKBA=
Date: Wed, 4 Dec 2013 14:11:21 +0000
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References: <DA294411-23F5-454C-91AB-3B99786F264D@brianrosen.net> <CEC4CDBB.729DC%rmohanr@cisco.com>
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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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Should it always be the SRC sending FIR or the SRS can do that? I guess if =
we want to make SRS to be interoperable with any SRC then it would be simpl=
er for the SRS to expect an IFrame as soon as RS is established. This means=
 mandating the SRC to do something such as sending FIR or generate one on i=
ts own based on the SRC's RTP role.=20

Acceptable clip is hard to quantify as a requirement, and I agree we should=
 still put some text to point this out and let SRC to optimize this as an i=
mplementation issue.

Regards,
Henry

-----Original Message-----
From: Ram Mohan R (rmohanr) [mailto:rmohanr@cisco.com]=20
Sent: December-04-13 1:46 AM
To: Brian Rosen; Henry Lum
Cc: siprec@ietf.org
Subject: Re: [siprec] Feedback from NENA ICE-8 Event

Another way would be to have a persistent RS between SRC and SRS and
record the CS from the beginning. But again Persistent RS is not feasible
in all cases.
I think the best we have today is to have SRC request for I-Frame via FIR
request as soon as RS is setup/being setup. This would still create a
small clip.

Perhaps we need to have some text on what is a acceptable clip.

Regards,
Ram

-----Original Message-----
From: Brian Rosen <br@brianrosen.net>
Date: Wednesday, 4 December 2013 1:21 AM
To: Henry Lum <Henry.Lum@genesyslab.com>
Cc: "siprec@ietf.org" <siprec@ietf.org>
Subject: Re: [siprec] Feedback from NENA ICE-8 Event

>You MUST start the RS with an I-frame unless you know that every block
>will be refreshed soon.  Since the SRS can=B9t manage the timing of the RS
>vs the CS, it has to be up the the SRC to fix it.
>We can talk about how much clipping is acceptable, but the SRC has to
>arrange an I-Frame as the first thing in the RS.
>
>I=B9d do this by asking for an i-frame as soon as I started establishing
>the RS, and have enough buffering to cover receipt of the I-Frame to the
>RS media flowing.
>
>What would be really hard to handle is a CS that didn=B9t implement FIR.
>
>Brian
>On Dec 3, 2013, at 2:42 PM, Henry Lum <Henry.Lum@genesyslab.com> wrote:
>
>> The protocol spec mentions the use of FIR for generating a full I-frame
>>in section 8.1.7, but I think it should be an implementation issue to
>>have an SRC to buffer media to start with a full I-frame in an RS since
>>an SRC is not always an RTP endpoint. Also some endpoints don't generate
>>I-frames very often; if a CS is not recorded in the beginning of the
>>call but recorded later during the call, then it's hard to mandate an
>>SRC to buffer media without a recording so that it can generate an
>>I-Frame in the middle of the call.
>>=20
>> Henry
>>=20
>> -----Original Message-----
>> From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Brian Rosen
>> Sent: December-03-13 2:21 PM
>> To: Simon Farrow
>> Cc: siprec@ietf.org
>> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>>=20
>> Do we have anything specific about full frame refresh in -protocol?
>>Don't remember it.  We probably want the text Simon cites from NENA
>>08-003, with some text that says if the frame refresh request mechanism
>>on the CS is different from that on the RS then the SRC has to interwork
>>them.
>>=20
>> We then probably could use an implementation note that states that the
>>SRC must buffer video such that if the RS is established after the CS,
>>the RS must start with a full I-Frame.
>>=20
>> Brian
>>=20
>> On Dec 3, 2013, at 1:32 PM, Simon Farrow <simon.farrow@stancilcorp.com>
>>wrote:
>>=20
>>> Typically we found SRC where 'forking' the media to the SRS. A call was
>>> setup between a UA and the SRC which was followed by the SRC sending an
>>> INVITE/OK/ACK to the SRS and the media was 'forked' to the SRS.
>>>=20
>>> This worked except for video as a traditional cause of interoperability
>>> problems with video is that parties in a call use different approaches
>>>for
>>> video fast update requests. What we witnessed was the SRC may not send
>>>the
>>> SRS the original I-Frame as the call was still being setup between the
>>>SRC
>>> and SRS but already in progress between the SRC and UA. This was a real
>>> problem if SRC only then sent P-Frames to the SRS.
>>>=20
>>> In the i3 document the following text was added to help address the
>>>issue
>>> but to me this does help the SIPREC specification
>>> "User Agents in the ESInet must support both RFC5104 [160] and RFC5168
>>>[161]
>>> for full frame refresh requests.  The RFC5104 RTCP method is preferred
>>>with
>>> fall back to RFC5168 INFO method when the sender does not implement
>>>RFC5104"
>>>=20
>>> A couple of thoughts came to mind regarding this issue.
>>>=20
>>> 1: Should we state the SRC have a media buffer - I do not think it
>>>would be
>>> a problem if sent it as quickly as possible once the session is
>>>established
>>> between the SRC and SRS.
>>> 2: Should the SRC forward on a RFC5104 RTCP or RFC5168 INFO message
>>>sent by
>>> an SRS.
>>>=20
>>>=20
>>> Simon Farrow
>>> Director of Engineering
>>>=20
>>> Stancil Corporation
>>> 2644 South Croddy Way
>>> Santa Ana
>>> CA 92704
>>>=20
>>> Tel: 1-714-546-2002 ext 4311
>>> http://www.stancilcorp.com
>>> simon.farrow@stancilcorp.com
>>>=20
>>>=20
>>>=20
>>>=20
>>>=20
>>> _______________________________________________
>>> siprec mailing list
>>> siprec@ietf.org
>>> https://www.ietf.org/mailman/listinfo/siprec
>>=20
>> _______________________________________________
>> siprec mailing list
>> siprec@ietf.org
>> https://www.ietf.org/mailman/listinfo/siprec
>>=20
>
>_______________________________________________
>siprec mailing list
>siprec@ietf.org
>https://www.ietf.org/mailman/listinfo/siprec



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From: Brian Rosen <br@brianrosen.net>
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To: Henry Lum <Henry.Lum@genesyslab.com>
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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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Some small confusion here.

The FIRST video sent by the SRC to the SRS has to be an I-frame.  If =
it=92s not, the SRS will have to discard frames until it finds an =
I-Frame.  It could send a FIR to the SRC to ask for that I-Frame, but =
the SRC already knows it must send one, so that FIR isn=92t very useful.

The SRC could be a lot of different kinds of things.  If it is, for =
example, a mixer (conference bridge, say), then it might be generating =
the video its sending to the SRS, and it can arrange an I-Frame to come =
first.  If it=92s a video endpoint, then it would be recording two =
streams, its own and the stream it receives.  We need to take these =
separately:

For the stream its sending, it has two options.  One is that it creates =
an entirely separate encoding for the RS.  In that case, it can start =
with an I-Frame.  The other option is that it clones the stream it=92s =
sending to the other endpoint.  In that case, it essentially has to =
behave as if it received a FIR from the other endpoint - finish the =
frame it=92s encoding, then send an I-Frame to both the other endpoint =
and the SRS.  =46rom then on, it=92s sending the same stream to both.  =
If it gets a FIR from either the other endpoint or the SRS, it generates =
an I-Frame to both.

For the stream its receiving, it also has two options.   It can =
re-encodes the stream it decoded, in which case it can arrange an =
I-Frame to come first.  Or, it can clone the stream it receives,  In =
that case, it will need to send a FIR to the other endpoint.  It will =
have to clip until it gets that I-Frame.  There really isn=92t much a =
choice.  That FIR should be sent as soon as it realizes it will be =
creating an RS.

Brian

On Dec 4, 2013, at 9:11 AM, Henry Lum <Henry.Lum@genesyslab.com> wrote:

> Should it always be the SRC sending FIR or the SRS can do that? I =
guess if we want to make SRS to be interoperable with any SRC then it =
would be simpler for the SRS to expect an IFrame as soon as RS is =
established. This means mandating the SRC to do something such as =
sending FIR or generate one on its own based on the SRC's RTP role.=20
>=20
> Acceptable clip is hard to quantify as a requirement, and I agree we =
should still put some text to point this out and let SRC to optimize =
this as an implementation issue.
>=20
> Regards,
> Henry
>=20
> -----Original Message-----
> From: Ram Mohan R (rmohanr) [mailto:rmohanr@cisco.com]=20
> Sent: December-04-13 1:46 AM
> To: Brian Rosen; Henry Lum
> Cc: siprec@ietf.org
> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>=20
> Another way would be to have a persistent RS between SRC and SRS and
> record the CS from the beginning. But again Persistent RS is not =
feasible
> in all cases.
> I think the best we have today is to have SRC request for I-Frame via =
FIR
> request as soon as RS is setup/being setup. This would still create a
> small clip.
>=20
> Perhaps we need to have some text on what is a acceptable clip.
>=20
> Regards,
> Ram
>=20
> -----Original Message-----
> From: Brian Rosen <br@brianrosen.net>
> Date: Wednesday, 4 December 2013 1:21 AM
> To: Henry Lum <Henry.Lum@genesyslab.com>
> Cc: "siprec@ietf.org" <siprec@ietf.org>
> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>=20
>> You MUST start the RS with an I-frame unless you know that every =
block
>> will be refreshed soon.  Since the SRS can=B9t manage the timing of =
the RS
>> vs the CS, it has to be up the the SRC to fix it.
>> We can talk about how much clipping is acceptable, but the SRC has to
>> arrange an I-Frame as the first thing in the RS.
>>=20
>> I=B9d do this by asking for an i-frame as soon as I started =
establishing
>> the RS, and have enough buffering to cover receipt of the I-Frame to =
the
>> RS media flowing.
>>=20
>> What would be really hard to handle is a CS that didn=B9t implement =
FIR.
>>=20
>> Brian
>> On Dec 3, 2013, at 2:42 PM, Henry Lum <Henry.Lum@genesyslab.com> =
wrote:
>>=20
>>> The protocol spec mentions the use of FIR for generating a full =
I-frame
>>> in section 8.1.7, but I think it should be an implementation issue =
to
>>> have an SRC to buffer media to start with a full I-frame in an RS =
since
>>> an SRC is not always an RTP endpoint. Also some endpoints don't =
generate
>>> I-frames very often; if a CS is not recorded in the beginning of the
>>> call but recorded later during the call, then it's hard to mandate =
an
>>> SRC to buffer media without a recording so that it can generate an
>>> I-Frame in the middle of the call.
>>>=20
>>> Henry
>>>=20
>>> -----Original Message-----
>>> From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Brian =
Rosen
>>> Sent: December-03-13 2:21 PM
>>> To: Simon Farrow
>>> Cc: siprec@ietf.org
>>> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>>>=20
>>> Do we have anything specific about full frame refresh in -protocol?
>>> Don't remember it.  We probably want the text Simon cites from NENA
>>> 08-003, with some text that says if the frame refresh request =
mechanism
>>> on the CS is different from that on the RS then the SRC has to =
interwork
>>> them.
>>>=20
>>> We then probably could use an implementation note that states that =
the
>>> SRC must buffer video such that if the RS is established after the =
CS,
>>> the RS must start with a full I-Frame.
>>>=20
>>> Brian
>>>=20
>>> On Dec 3, 2013, at 1:32 PM, Simon Farrow =
<simon.farrow@stancilcorp.com>
>>> wrote:
>>>=20
>>>> Typically we found SRC where 'forking' the media to the SRS. A call =
was
>>>> setup between a UA and the SRC which was followed by the SRC =
sending an
>>>> INVITE/OK/ACK to the SRS and the media was 'forked' to the SRS.
>>>>=20
>>>> This worked except for video as a traditional cause of =
interoperability
>>>> problems with video is that parties in a call use different =
approaches
>>>> for
>>>> video fast update requests. What we witnessed was the SRC may not =
send
>>>> the
>>>> SRS the original I-Frame as the call was still being setup between =
the
>>>> SRC
>>>> and SRS but already in progress between the SRC and UA. This was a =
real
>>>> problem if SRC only then sent P-Frames to the SRS.
>>>>=20
>>>> In the i3 document the following text was added to help address the
>>>> issue
>>>> but to me this does help the SIPREC specification
>>>> "User Agents in the ESInet must support both RFC5104 [160] and =
RFC5168
>>>> [161]
>>>> for full frame refresh requests.  The RFC5104 RTCP method is =
preferred
>>>> with
>>>> fall back to RFC5168 INFO method when the sender does not implement
>>>> RFC5104"
>>>>=20
>>>> A couple of thoughts came to mind regarding this issue.
>>>>=20
>>>> 1: Should we state the SRC have a media buffer - I do not think it
>>>> would be
>>>> a problem if sent it as quickly as possible once the session is
>>>> established
>>>> between the SRC and SRS.
>>>> 2: Should the SRC forward on a RFC5104 RTCP or RFC5168 INFO message
>>>> sent by
>>>> an SRS.
>>>>=20
>>>>=20
>>>> Simon Farrow
>>>> Director of Engineering
>>>>=20
>>>> Stancil Corporation
>>>> 2644 South Croddy Way
>>>> Santa Ana
>>>> CA 92704
>>>>=20
>>>> Tel: 1-714-546-2002 ext 4311
>>>> http://www.stancilcorp.com
>>>> simon.farrow@stancilcorp.com
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>> _______________________________________________
>>>> siprec mailing list
>>>> siprec@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/siprec
>>>=20
>>> _______________________________________________
>>> siprec mailing list
>>> siprec@ietf.org
>>> https://www.ietf.org/mailman/listinfo/siprec
>>>=20
>>=20
>> _______________________________________________
>> siprec mailing list
>> siprec@ietf.org
>> https://www.ietf.org/mailman/listinfo/siprec
>=20
>=20


From henry.lum@genesyslab.com  Wed Dec  4 07:06:47 2013
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From: Henry Lum <Henry.Lum@genesyslab.com>
To: Brian Rosen <br@brianrosen.net>
Thread-Topic: [siprec] Feedback from NENA ICE-8 Event
Thread-Index: Ac7wVdmiG0L5lhiHQ7WoOxMUM8dcKgASgJAAABBZUWD//4WagIAAtxMAgAANKBCAAHjcgIAAgWww
Date: Wed, 4 Dec 2013 15:06:35 +0000
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References: <DA294411-23F5-454C-91AB-3B99786F264D@brianrosen.net> <CEC4CDBB.729DC%rmohanr@cisco.com> <F3005B7CDE1DA5498B794C655CE1641E2BB92D@GENSJZMBX02.msg.int.genesyslab.com> <B8030ED6-057C-4E36-A755-E19BE6F41D14@brianrosen.net>
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Cc: "siprec@ietf.org" <siprec@ietf.org>
Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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The SRC can also be an RTP translator that simply forks media from an endpo=
int to the SRS. In this case, the SRC can send an FIR to the endpoint to ge=
nerate an I-Frame when RS is established.

Henry

-----Original Message-----
From: Brian Rosen [mailto:br@brianrosen.net]=20
Sent: December-04-13 9:46 AM
To: Henry Lum
Cc: Ram Mohan R (rmohanr); siprec@ietf.org
Subject: Re: [siprec] Feedback from NENA ICE-8 Event

Some small confusion here.

The FIRST video sent by the SRC to the SRS has to be an I-frame.  If it's n=
ot, the SRS will have to discard frames until it finds an I-Frame.  It coul=
d send a FIR to the SRC to ask for that I-Frame, but the SRC already knows =
it must send one, so that FIR isn't very useful.

The SRC could be a lot of different kinds of things.  If it is, for example=
, a mixer (conference bridge, say), then it might be generating the video i=
ts sending to the SRS, and it can arrange an I-Frame to come first.  If it'=
s a video endpoint, then it would be recording two streams, its own and the=
 stream it receives.  We need to take these separately:

For the stream its sending, it has two options.  One is that it creates an =
entirely separate encoding for the RS.  In that case, it can start with an =
I-Frame.  The other option is that it clones the stream it's sending to the=
 other endpoint.  In that case, it essentially has to behave as if it recei=
ved a FIR from the other endpoint - finish the frame it's encoding, then se=
nd an I-Frame to both the other endpoint and the SRS.  From then on, it's s=
ending the same stream to both.  If it gets a FIR from either the other end=
point or the SRS, it generates an I-Frame to both.

For the stream its receiving, it also has two options.   It can re-encodes =
the stream it decoded, in which case it can arrange an I-Frame to come firs=
t.  Or, it can clone the stream it receives,  In that case, it will need to=
 send a FIR to the other endpoint.  It will have to clip until it gets that=
 I-Frame.  There really isn't much a choice.  That FIR should be sent as so=
on as it realizes it will be creating an RS.

Brian

On Dec 4, 2013, at 9:11 AM, Henry Lum <Henry.Lum@genesyslab.com> wrote:

> Should it always be the SRC sending FIR or the SRS can do that? I guess i=
f we want to make SRS to be interoperable with any SRC then it would be sim=
pler for the SRS to expect an IFrame as soon as RS is established. This mea=
ns mandating the SRC to do something such as sending FIR or generate one on=
 its own based on the SRC's RTP role.=20
>=20
> Acceptable clip is hard to quantify as a requirement, and I agree we shou=
ld still put some text to point this out and let SRC to optimize this as an=
 implementation issue.
>=20
> Regards,
> Henry
>=20
> -----Original Message-----
> From: Ram Mohan R (rmohanr) [mailto:rmohanr@cisco.com]=20
> Sent: December-04-13 1:46 AM
> To: Brian Rosen; Henry Lum
> Cc: siprec@ietf.org
> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>=20
> Another way would be to have a persistent RS between SRC and SRS and
> record the CS from the beginning. But again Persistent RS is not feasible
> in all cases.
> I think the best we have today is to have SRC request for I-Frame via FIR
> request as soon as RS is setup/being setup. This would still create a
> small clip.
>=20
> Perhaps we need to have some text on what is a acceptable clip.
>=20
> Regards,
> Ram
>=20
> -----Original Message-----
> From: Brian Rosen <br@brianrosen.net>
> Date: Wednesday, 4 December 2013 1:21 AM
> To: Henry Lum <Henry.Lum@genesyslab.com>
> Cc: "siprec@ietf.org" <siprec@ietf.org>
> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>=20
>> You MUST start the RS with an I-frame unless you know that every block
>> will be refreshed soon.  Since the SRS can=B9t manage the timing of the =
RS
>> vs the CS, it has to be up the the SRC to fix it.
>> We can talk about how much clipping is acceptable, but the SRC has to
>> arrange an I-Frame as the first thing in the RS.
>>=20
>> I=B9d do this by asking for an i-frame as soon as I started establishing
>> the RS, and have enough buffering to cover receipt of the I-Frame to the
>> RS media flowing.
>>=20
>> What would be really hard to handle is a CS that didn=B9t implement FIR.
>>=20
>> Brian
>> On Dec 3, 2013, at 2:42 PM, Henry Lum <Henry.Lum@genesyslab.com> wrote:
>>=20
>>> The protocol spec mentions the use of FIR for generating a full I-frame
>>> in section 8.1.7, but I think it should be an implementation issue to
>>> have an SRC to buffer media to start with a full I-frame in an RS since
>>> an SRC is not always an RTP endpoint. Also some endpoints don't generat=
e
>>> I-frames very often; if a CS is not recorded in the beginning of the
>>> call but recorded later during the call, then it's hard to mandate an
>>> SRC to buffer media without a recording so that it can generate an
>>> I-Frame in the middle of the call.
>>>=20
>>> Henry
>>>=20
>>> -----Original Message-----
>>> From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Brian Rosen
>>> Sent: December-03-13 2:21 PM
>>> To: Simon Farrow
>>> Cc: siprec@ietf.org
>>> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>>>=20
>>> Do we have anything specific about full frame refresh in -protocol?
>>> Don't remember it.  We probably want the text Simon cites from NENA
>>> 08-003, with some text that says if the frame refresh request mechanism
>>> on the CS is different from that on the RS then the SRC has to interwor=
k
>>> them.
>>>=20
>>> We then probably could use an implementation note that states that the
>>> SRC must buffer video such that if the RS is established after the CS,
>>> the RS must start with a full I-Frame.
>>>=20
>>> Brian
>>>=20
>>> On Dec 3, 2013, at 1:32 PM, Simon Farrow <simon.farrow@stancilcorp.com>
>>> wrote:
>>>=20
>>>> Typically we found SRC where 'forking' the media to the SRS. A call wa=
s
>>>> setup between a UA and the SRC which was followed by the SRC sending a=
n
>>>> INVITE/OK/ACK to the SRS and the media was 'forked' to the SRS.
>>>>=20
>>>> This worked except for video as a traditional cause of interoperabilit=
y
>>>> problems with video is that parties in a call use different approaches
>>>> for
>>>> video fast update requests. What we witnessed was the SRC may not send
>>>> the
>>>> SRS the original I-Frame as the call was still being setup between the
>>>> SRC
>>>> and SRS but already in progress between the SRC and UA. This was a rea=
l
>>>> problem if SRC only then sent P-Frames to the SRS.
>>>>=20
>>>> In the i3 document the following text was added to help address the
>>>> issue
>>>> but to me this does help the SIPREC specification
>>>> "User Agents in the ESInet must support both RFC5104 [160] and RFC5168
>>>> [161]
>>>> for full frame refresh requests.  The RFC5104 RTCP method is preferred
>>>> with
>>>> fall back to RFC5168 INFO method when the sender does not implement
>>>> RFC5104"
>>>>=20
>>>> A couple of thoughts came to mind regarding this issue.
>>>>=20
>>>> 1: Should we state the SRC have a media buffer - I do not think it
>>>> would be
>>>> a problem if sent it as quickly as possible once the session is
>>>> established
>>>> between the SRC and SRS.
>>>> 2: Should the SRC forward on a RFC5104 RTCP or RFC5168 INFO message
>>>> sent by
>>>> an SRS.
>>>>=20
>>>>=20
>>>> Simon Farrow
>>>> Director of Engineering
>>>>=20
>>>> Stancil Corporation
>>>> 2644 South Croddy Way
>>>> Santa Ana
>>>> CA 92704
>>>>=20
>>>> Tel: 1-714-546-2002 ext 4311
>>>> http://www.stancilcorp.com
>>>> simon.farrow@stancilcorp.com
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>> _______________________________________________
>>>> siprec mailing list
>>>> siprec@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/siprec
>>>=20
>>> _______________________________________________
>>> siprec mailing list
>>> siprec@ietf.org
>>> https://www.ietf.org/mailman/listinfo/siprec
>>>=20
>>=20
>> _______________________________________________
>> siprec mailing list
>> siprec@ietf.org
>> https://www.ietf.org/mailman/listinfo/siprec
>=20
>=20



From br@brianrosen.net  Wed Dec  4 07:23:33 2013
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From: Brian Rosen <br@brianrosen.net>
In-Reply-To: <F3005B7CDE1DA5498B794C655CE1641E2BBC28@GENSJZMBX02.msg.int.genesyslab.com>
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References: <DA294411-23F5-454C-91AB-3B99786F264D@brianrosen.net> <CEC4CDBB.729DC%rmohanr@cisco.com> <F3005B7CDE1DA5498B794C655CE1641E2BB92D@GENSJZMBX02.msg.int.genesyslab.com> <B8030ED6-057C-4E36-A755-E19BE6F41D14@brianrosen.net> <F3005B7CDE1DA5498B794C655CE1641E2BBC28@GENSJZMBX02.msg.int.genesyslab.com>
To: Henry Lum <Henry.Lum@genesyslab.com>
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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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Sure, that=92s like my last example.  The key is that there will be =
clipping until one arrives and is sent to the SRS.  If there is a =
requirement to not clip, then some other way to get the video is needed =
other than clone RTP packets.  It=92s not all that hard to re-encode.

I think the best we can do here, since we can=92t impose requirement on =
the other endpoints, is to have some discussion of the topic in the text =
and recommend FIR support.  Since there are problems where the SRS =
really has to request a FIR from the SRC, we need to require support for =
it in both SRS and SRC, but that is unrelated to the topic of initial =
I-Frame.

Brian


On Dec 4, 2013, at 10:06 AM, Henry Lum <Henry.Lum@genesyslab.com> wrote:

> The SRC can also be an RTP translator that simply forks media from an =
endpoint to the SRS. In this case, the SRC can send an FIR to the =
endpoint to generate an I-Frame when RS is established.
>=20
> Henry
>=20
> -----Original Message-----
> From: Brian Rosen [mailto:br@brianrosen.net]=20
> Sent: December-04-13 9:46 AM
> To: Henry Lum
> Cc: Ram Mohan R (rmohanr); siprec@ietf.org
> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>=20
> Some small confusion here.
>=20
> The FIRST video sent by the SRC to the SRS has to be an I-frame.  If =
it's not, the SRS will have to discard frames until it finds an I-Frame. =
 It could send a FIR to the SRC to ask for that I-Frame, but the SRC =
already knows it must send one, so that FIR isn't very useful.
>=20
> The SRC could be a lot of different kinds of things.  If it is, for =
example, a mixer (conference bridge, say), then it might be generating =
the video its sending to the SRS, and it can arrange an I-Frame to come =
first.  If it's a video endpoint, then it would be recording two =
streams, its own and the stream it receives.  We need to take these =
separately:
>=20
> For the stream its sending, it has two options.  One is that it =
creates an entirely separate encoding for the RS.  In that case, it can =
start with an I-Frame.  The other option is that it clones the stream =
it's sending to the other endpoint.  In that case, it essentially has to =
behave as if it received a FIR from the other endpoint - finish the =
frame it's encoding, then send an I-Frame to both the other endpoint and =
the SRS.  =46rom then on, it's sending the same stream to both.  If it =
gets a FIR from either the other endpoint or the SRS, it generates an =
I-Frame to both.
>=20
> For the stream its receiving, it also has two options.   It can =
re-encodes the stream it decoded, in which case it can arrange an =
I-Frame to come first.  Or, it can clone the stream it receives,  In =
that case, it will need to send a FIR to the other endpoint.  It will =
have to clip until it gets that I-Frame.  There really isn't much a =
choice.  That FIR should be sent as soon as it realizes it will be =
creating an RS.
>=20
> Brian
>=20
> On Dec 4, 2013, at 9:11 AM, Henry Lum <Henry.Lum@genesyslab.com> =
wrote:
>=20
>> Should it always be the SRC sending FIR or the SRS can do that? I =
guess if we want to make SRS to be interoperable with any SRC then it =
would be simpler for the SRS to expect an IFrame as soon as RS is =
established. This means mandating the SRC to do something such as =
sending FIR or generate one on its own based on the SRC's RTP role.=20
>>=20
>> Acceptable clip is hard to quantify as a requirement, and I agree we =
should still put some text to point this out and let SRC to optimize =
this as an implementation issue.
>>=20
>> Regards,
>> Henry
>>=20
>> -----Original Message-----
>> From: Ram Mohan R (rmohanr) [mailto:rmohanr@cisco.com]=20
>> Sent: December-04-13 1:46 AM
>> To: Brian Rosen; Henry Lum
>> Cc: siprec@ietf.org
>> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>>=20
>> Another way would be to have a persistent RS between SRC and SRS and
>> record the CS from the beginning. But again Persistent RS is not =
feasible
>> in all cases.
>> I think the best we have today is to have SRC request for I-Frame via =
FIR
>> request as soon as RS is setup/being setup. This would still create a
>> small clip.
>>=20
>> Perhaps we need to have some text on what is a acceptable clip.
>>=20
>> Regards,
>> Ram
>>=20
>> -----Original Message-----
>> From: Brian Rosen <br@brianrosen.net>
>> Date: Wednesday, 4 December 2013 1:21 AM
>> To: Henry Lum <Henry.Lum@genesyslab.com>
>> Cc: "siprec@ietf.org" <siprec@ietf.org>
>> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>>=20
>>> You MUST start the RS with an I-frame unless you know that every =
block
>>> will be refreshed soon.  Since the SRS can=B9t manage the timing of =
the RS
>>> vs the CS, it has to be up the the SRC to fix it.
>>> We can talk about how much clipping is acceptable, but the SRC has =
to
>>> arrange an I-Frame as the first thing in the RS.
>>>=20
>>> I=B9d do this by asking for an i-frame as soon as I started =
establishing
>>> the RS, and have enough buffering to cover receipt of the I-Frame to =
the
>>> RS media flowing.
>>>=20
>>> What would be really hard to handle is a CS that didn=B9t implement =
FIR.
>>>=20
>>> Brian
>>> On Dec 3, 2013, at 2:42 PM, Henry Lum <Henry.Lum@genesyslab.com> =
wrote:
>>>=20
>>>> The protocol spec mentions the use of FIR for generating a full =
I-frame
>>>> in section 8.1.7, but I think it should be an implementation issue =
to
>>>> have an SRC to buffer media to start with a full I-frame in an RS =
since
>>>> an SRC is not always an RTP endpoint. Also some endpoints don't =
generate
>>>> I-frames very often; if a CS is not recorded in the beginning of =
the
>>>> call but recorded later during the call, then it's hard to mandate =
an
>>>> SRC to buffer media without a recording so that it can generate an
>>>> I-Frame in the middle of the call.
>>>>=20
>>>> Henry
>>>>=20
>>>> -----Original Message-----
>>>> From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Brian =
Rosen
>>>> Sent: December-03-13 2:21 PM
>>>> To: Simon Farrow
>>>> Cc: siprec@ietf.org
>>>> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>>>>=20
>>>> Do we have anything specific about full frame refresh in -protocol?
>>>> Don't remember it.  We probably want the text Simon cites from NENA
>>>> 08-003, with some text that says if the frame refresh request =
mechanism
>>>> on the CS is different from that on the RS then the SRC has to =
interwork
>>>> them.
>>>>=20
>>>> We then probably could use an implementation note that states that =
the
>>>> SRC must buffer video such that if the RS is established after the =
CS,
>>>> the RS must start with a full I-Frame.
>>>>=20
>>>> Brian
>>>>=20
>>>> On Dec 3, 2013, at 1:32 PM, Simon Farrow =
<simon.farrow@stancilcorp.com>
>>>> wrote:
>>>>=20
>>>>> Typically we found SRC where 'forking' the media to the SRS. A =
call was
>>>>> setup between a UA and the SRC which was followed by the SRC =
sending an
>>>>> INVITE/OK/ACK to the SRS and the media was 'forked' to the SRS.
>>>>>=20
>>>>> This worked except for video as a traditional cause of =
interoperability
>>>>> problems with video is that parties in a call use different =
approaches
>>>>> for
>>>>> video fast update requests. What we witnessed was the SRC may not =
send
>>>>> the
>>>>> SRS the original I-Frame as the call was still being setup between =
the
>>>>> SRC
>>>>> and SRS but already in progress between the SRC and UA. This was a =
real
>>>>> problem if SRC only then sent P-Frames to the SRS.
>>>>>=20
>>>>> In the i3 document the following text was added to help address =
the
>>>>> issue
>>>>> but to me this does help the SIPREC specification
>>>>> "User Agents in the ESInet must support both RFC5104 [160] and =
RFC5168
>>>>> [161]
>>>>> for full frame refresh requests.  The RFC5104 RTCP method is =
preferred
>>>>> with
>>>>> fall back to RFC5168 INFO method when the sender does not =
implement
>>>>> RFC5104"
>>>>>=20
>>>>> A couple of thoughts came to mind regarding this issue.
>>>>>=20
>>>>> 1: Should we state the SRC have a media buffer - I do not think it
>>>>> would be
>>>>> a problem if sent it as quickly as possible once the session is
>>>>> established
>>>>> between the SRC and SRS.
>>>>> 2: Should the SRC forward on a RFC5104 RTCP or RFC5168 INFO =
message
>>>>> sent by
>>>>> an SRS.
>>>>>=20
>>>>>=20
>>>>> Simon Farrow
>>>>> Director of Engineering
>>>>>=20
>>>>> Stancil Corporation
>>>>> 2644 South Croddy Way
>>>>> Santa Ana
>>>>> CA 92704
>>>>>=20
>>>>> Tel: 1-714-546-2002 ext 4311
>>>>> http://www.stancilcorp.com
>>>>> simon.farrow@stancilcorp.com
>>>>>=20
>>>>>=20
>>>>>=20
>>>>>=20
>>>>>=20
>>>>> _______________________________________________
>>>>> siprec mailing list
>>>>> siprec@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/siprec
>>>>=20
>>>> _______________________________________________
>>>> siprec mailing list
>>>> siprec@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/siprec
>>>>=20
>>>=20
>>> _______________________________________________
>>> siprec mailing list
>>> siprec@ietf.org
>>> https://www.ietf.org/mailman/listinfo/siprec
>>=20
>>=20
>=20
>=20


From pkyzivat@alum.mit.edu  Wed Dec  4 07:26:24 2013
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From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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Why do we need to define what is an acceptable clip?
It is the SRC that is deciding to initiate the recording. So why isn't 
it at the discretion of the SRC what clip is acceptable? This is a 
quality of implementation issue, not a standardization issue.

	Thanks,
	Paul

On 12/4/13 1:46 AM, Ram Mohan R (rmohanr) wrote:
> Another way would be to have a persistent RS between SRC and SRS and
> record the CS from the beginning. But again Persistent RS is not feasible
> in all cases.
> I think the best we have today is to have SRC request for I-Frame via FIR
> request as soon as RS is setup/being setup. This would still create a
> small clip.
>
> Perhaps we need to have some text on what is a acceptable clip.
>
> Regards,
> Ram
>
> -----Original Message-----
> From: Brian Rosen <br@brianrosen.net>
> Date: Wednesday, 4 December 2013 1:21 AM
> To: Henry Lum <Henry.Lum@genesyslab.com>
> Cc: "siprec@ietf.org" <siprec@ietf.org>
> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>
>> You MUST start the RS with an I-frame unless you know that every block
>> will be refreshed soon.  Since the SRS can¹t manage the timing of the RS
>> vs the CS, it has to be up the the SRC to fix it.
>> We can talk about how much clipping is acceptable, but the SRC has to
>> arrange an I-Frame as the first thing in the RS.
>>
>> I¹d do this by asking for an i-frame as soon as I started establishing
>> the RS, and have enough buffering to cover receipt of the I-Frame to the
>> RS media flowing.
>>
>> What would be really hard to handle is a CS that didn¹t implement FIR.
>>
>> Brian
>> On Dec 3, 2013, at 2:42 PM, Henry Lum <Henry.Lum@genesyslab.com> wrote:
>>
>>> The protocol spec mentions the use of FIR for generating a full I-frame
>>> in section 8.1.7, but I think it should be an implementation issue to
>>> have an SRC to buffer media to start with a full I-frame in an RS since
>>> an SRC is not always an RTP endpoint. Also some endpoints don't generate
>>> I-frames very often; if a CS is not recorded in the beginning of the
>>> call but recorded later during the call, then it's hard to mandate an
>>> SRC to buffer media without a recording so that it can generate an
>>> I-Frame in the middle of the call.
>>>
>>> Henry
>>>
>>> -----Original Message-----
>>> From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Brian Rosen
>>> Sent: December-03-13 2:21 PM
>>> To: Simon Farrow
>>> Cc: siprec@ietf.org
>>> Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>>>
>>> Do we have anything specific about full frame refresh in -protocol?
>>> Don't remember it.  We probably want the text Simon cites from NENA
>>> 08-003, with some text that says if the frame refresh request mechanism
>>> on the CS is different from that on the RS then the SRC has to interwork
>>> them.
>>>
>>> We then probably could use an implementation note that states that the
>>> SRC must buffer video such that if the RS is established after the CS,
>>> the RS must start with a full I-Frame.
>>>
>>> Brian
>>>
>>> On Dec 3, 2013, at 1:32 PM, Simon Farrow <simon.farrow@stancilcorp.com>
>>> wrote:
>>>
>>>> Typically we found SRC where 'forking' the media to the SRS. A call was
>>>> setup between a UA and the SRC which was followed by the SRC sending an
>>>> INVITE/OK/ACK to the SRS and the media was 'forked' to the SRS.
>>>>
>>>> This worked except for video as a traditional cause of interoperability
>>>> problems with video is that parties in a call use different approaches
>>>> for
>>>> video fast update requests. What we witnessed was the SRC may not send
>>>> the
>>>> SRS the original I-Frame as the call was still being setup between the
>>>> SRC
>>>> and SRS but already in progress between the SRC and UA. This was a real
>>>> problem if SRC only then sent P-Frames to the SRS.
>>>>
>>>> In the i3 document the following text was added to help address the
>>>> issue
>>>> but to me this does help the SIPREC specification
>>>> "User Agents in the ESInet must support both RFC5104 [160] and RFC5168
>>>> [161]
>>>> for full frame refresh requests.  The RFC5104 RTCP method is preferred
>>>> with
>>>> fall back to RFC5168 INFO method when the sender does not implement
>>>> RFC5104"
>>>>
>>>> A couple of thoughts came to mind regarding this issue.
>>>>
>>>> 1: Should we state the SRC have a media buffer - I do not think it
>>>> would be
>>>> a problem if sent it as quickly as possible once the session is
>>>> established
>>>> between the SRC and SRS.
>>>> 2: Should the SRC forward on a RFC5104 RTCP or RFC5168 INFO message
>>>> sent by
>>>> an SRS.
>>>>
>>>>
>>>> Simon Farrow
>>>> Director of Engineering
>>>>
>>>> Stancil Corporation
>>>> 2644 South Croddy Way
>>>> Santa Ana
>>>> CA 92704
>>>>
>>>> Tel: 1-714-546-2002 ext 4311
>>>> http://www.stancilcorp.com
>>>> simon.farrow@stancilcorp.com
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> siprec mailing list
>>>> siprec@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/siprec
>>>
>>> _______________________________________________
>>> siprec mailing list
>>> siprec@ietf.org
>>> https://www.ietf.org/mailman/listinfo/siprec
>>>
>>
>> _______________________________________________
>> siprec mailing list
>> siprec@ietf.org
>> https://www.ietf.org/mailman/listinfo/siprec
>
> _______________________________________________
> siprec mailing list
> siprec@ietf.org
> https://www.ietf.org/mailman/listinfo/siprec
>


From pkyzivat@alum.mit.edu  Wed Dec  4 07:34:38 2013
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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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On 12/3/13 1:32 PM, Simon Farrow wrote:

> In the i3 document the following text was added to help address the issue
> but to me this does help the SIPREC specification
> "User Agents in the ESInet must support both RFC5104 [160] and RFC5168 [161]
> for full frame refresh requests.  The RFC5104 RTCP method is preferred with
> fall back to RFC5168 INFO method when the sender does not implement RFC5104"

ISTM that we need to have some text about how to deal with the two 
mechanisms. I don't think we can require UAs in the CS to support both 
mechanisms. So I think we must make it a requirement on the SRC and/or 
the SRS to deal with interworking.

ISTM that we can reasonably put a requirement on the SRS to support both 
mechanisms.

	Thanks,
	Paul


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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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Actually, I think you have to require the SRC to support both =
mechanisms, because you want the best chance it can send a FIR to the =
other UA in the CS.  You could allow the SRS to choose, but actually, =
I=92d say require 5104.

Brian

On Dec 4, 2013, at 10:34 AM, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:

> On 12/3/13 1:32 PM, Simon Farrow wrote:
>=20
>> In the i3 document the following text was added to help address the =
issue
>> but to me this does help the SIPREC specification
>> "User Agents in the ESInet must support both RFC5104 [160] and =
RFC5168 [161]
>> for full frame refresh requests.  The RFC5104 RTCP method is =
preferred with
>> fall back to RFC5168 INFO method when the sender does not implement =
RFC5104"
>=20
> ISTM that we need to have some text about how to deal with the two =
mechanisms. I don't think we can require UAs in the CS to support both =
mechanisms. So I think we must make it a requirement on the SRC and/or =
the SRS to deal with interworking.
>=20
> ISTM that we can reasonably put a requirement on the SRS to support =
both mechanisms.
>=20
> 	Thanks,
> 	Paul
>=20
> _______________________________________________
> siprec mailing list
> siprec@ietf.org
> https://www.ietf.org/mailman/listinfo/siprec


From pkyzivat@alum.mit.edu  Wed Dec  4 08:08:42 2013
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Subject: Re: [siprec] IETF 88 - SIPREC Draft Agenda
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On 12/4/13 1:39 AM, Ram Mohan R (rmohanr) wrote:

>> One other comment I heard from many was that the language of the metadata
>> drafts was hard to follow, due to usage and grammar issues - but that
>> generally you could understand the intent. Cleaning up the language
>> without
>> changing the intent is doable, and would help. I don't recall anyone
>> saying
>> they had issues with the protocol draft.
>
> I will get the draft reviewed and edited by a native speaker and fix the
> grammar issues in it.

I'll do that. I'm a native (American) English speaker.

(That doesn't guarantee that what I write will be more intelligible.)

Ultimately, as it is published as an RFC it will be edited again by a 
professional editor.

	Thanks,
	Paul


From br@brianrosen.net  Wed Dec  4 08:25:03 2013
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To: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Subject: Re: [siprec] IETF 88 - SIPREC Draft Agenda
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Matt=92s comments imply that we wanted to always have persistent RS =
connections and reuse them.  We should make sure he understands that =
creating a new RS for every CS that is recorded is a normal, expected =
use of the protocol, but that there were use cases where the =
relationship between RS and CS is more complex.

Adding the NENA IDs doesn=92t force 1:1 RS to CS.  We save the IDs with =
the recording, but it=92s metadata.

Brian

On Dec 4, 2013, at 11:08 AM, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:

> On 12/4/13 1:39 AM, Ram Mohan R (rmohanr) wrote:
>=20
>>> One other comment I heard from many was that the language of the =
metadata
>>> drafts was hard to follow, due to usage and grammar issues - but =
that
>>> generally you could understand the intent. Cleaning up the language
>>> without
>>> changing the intent is doable, and would help. I don't recall anyone
>>> saying
>>> they had issues with the protocol draft.
>>=20
>> I will get the draft reviewed and edited by a native speaker and fix =
the
>> grammar issues in it.
>=20
> I'll do that. I'm a native (American) English speaker.
>=20
> (That doesn't guarantee that what I write will be more intelligible.)
>=20
> Ultimately, as it is published as an RFC it will be edited again by a =
professional editor.
>=20
> 	Thanks,
> 	Paul
>=20
> _______________________________________________
> siprec mailing list
> siprec@ietf.org
> https://www.ietf.org/mailman/listinfo/siprec


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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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On 12/4/13 10:37 AM, Brian Rosen wrote:
> Actually, I think you have to require the SRC to support both mechanisms, because you want the best chance it can send a FIR to the other UA in the CS.  You could allow the SRS to choose, but actually, I’d say require 5104.

I mention the SRS first because it is generally the most capable device, 
and the one there are the fewest of.

SRCs may be incorporated into all sorts of things, some fairly limited.

If an SRC is just relaying the frame refresh requests, it may be easier 
for it to only support what the CS supports rather than interworking two 
mechanisms.

But I haven't thought through fully whether there are problems with this.

	Thanks,
	Paul

> Brian
>
> On Dec 4, 2013, at 10:34 AM, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>
>> On 12/3/13 1:32 PM, Simon Farrow wrote:
>>
>>> In the i3 document the following text was added to help address the issue
>>> but to me this does help the SIPREC specification
>>> "User Agents in the ESInet must support both RFC5104 [160] and RFC5168 [161]
>>> for full frame refresh requests.  The RFC5104 RTCP method is preferred with
>>> fall back to RFC5168 INFO method when the sender does not implement RFC5104"
>>
>> ISTM that we need to have some text about how to deal with the two mechanisms. I don't think we can require UAs in the CS to support both mechanisms. So I think we must make it a requirement on the SRC and/or the SRS to deal with interworking.
>>
>> ISTM that we can reasonably put a requirement on the SRS to support both mechanisms.
>>
>> 	Thanks,
>> 	Paul
>>
>> _______________________________________________
>> siprec mailing list
>> siprec@ietf.org
>> https://www.ietf.org/mailman/listinfo/siprec
>
>


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From: "Ram Mohan R (rmohanr)" <rmohanr@cisco.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>, "siprec@ietf.org" <siprec@ietf.org>
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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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But, the SRC really, really wants to be able to get a FIR to the UA in =
the CS.  Therefore, it has to support both.  No limitation of the SRC in =
this regard can be made up by smarts in the SRS.  So the SRC has to =
support both 5104 and 5168.  You could, I suppose say that if the SRC =
knows, for sure, that each and every one of the UAs in the CS supports =
one of them, then it doesn=92t have to support the other.

If the SRC supports both, then the SRS could, in theory, support either. =
 I think that is a mistake.  It should support 5104, it=92s a better =
mechanism.  5168 documents an old mechanism.=20

Interworking the two is pretty easy.  If you really think that it=92s a =
burden, then supporting both on the SRS would fix that.

Brian

On Dec 4, 2013, at 11:31 AM, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:

> On 12/4/13 10:37 AM, Brian Rosen wrote:
>> Actually, I think you have to require the SRC to support both =
mechanisms, because you want the best chance it can send a FIR to the =
other UA in the CS.  You could allow the SRS to choose, but actually, =
I=92d say require 5104.
>=20
> I mention the SRS first because it is generally the most capable =
device, and the one there are the fewest of.
>=20
> SRCs may be incorporated into all sorts of things, some fairly =
limited.
>=20
> If an SRC is just relaying the frame refresh requests, it may be =
easier for it to only support what the CS supports rather than =
interworking two mechanisms.
>=20
> But I haven't thought through fully whether there are problems with =
this.
>=20
> 	Thanks,
> 	Paul
>=20
>> Brian
>>=20
>> On Dec 4, 2013, at 10:34 AM, Paul Kyzivat <pkyzivat@alum.mit.edu> =
wrote:
>>=20
>>> On 12/3/13 1:32 PM, Simon Farrow wrote:
>>>=20
>>>> In the i3 document the following text was added to help address the =
issue
>>>> but to me this does help the SIPREC specification
>>>> "User Agents in the ESInet must support both RFC5104 [160] and =
RFC5168 [161]
>>>> for full frame refresh requests.  The RFC5104 RTCP method is =
preferred with
>>>> fall back to RFC5168 INFO method when the sender does not implement =
RFC5104"
>>>=20
>>> ISTM that we need to have some text about how to deal with the two =
mechanisms. I don't think we can require UAs in the CS to support both =
mechanisms. So I think we must make it a requirement on the SRC and/or =
the SRS to deal with interworking.
>>>=20
>>> ISTM that we can reasonably put a requirement on the SRS to support =
both mechanisms.
>>>=20
>>> 	Thanks,
>>> 	Paul
>>>=20
>>> _______________________________________________
>>> siprec mailing list
>>> siprec@ietf.org
>>> https://www.ietf.org/mailman/listinfo/siprec
>>=20
>>=20
>=20


From pkyzivat@alum.mit.edu  Wed Dec  4 13:39:20 2013
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On 12/4/13 1:31 PM, Brian Rosen wrote:
> But, the SRC really, really wants to be able to get a FIR to the UA in the CS.  Therefore, it has to support both.  No limitation of the SRC in this regard can be made up by smarts in the SRS.  So the SRC has to support both 5104 and 5168.  You could, I suppose say that if the SRC knows, for sure, that each and every one of the UAs in the CS supports one of them, then it doesn’t have to support the other.
>
> If the SRC supports both, then the SRS could, in theory, support either.  I think that is a mistake.  It should support 5104, it’s a better mechanism.  5168 documents an old mechanism.
>
> Interworking the two is pretty easy.  If you really think that it’s a burden, then supporting both on the SRS would fix that.

I'm thinking of a UA that acts as its own SRC. Maybe it only supports 
one of the mechanisms, so it knows the one it supports is used on the 
CS. So it can use that one on the RS too.

	Thanks,
	Paul

> Brian
>
> On Dec 4, 2013, at 11:31 AM, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>
>> On 12/4/13 10:37 AM, Brian Rosen wrote:
>>> Actually, I think you have to require the SRC to support both mechanisms, because you want the best chance it can send a FIR to the other UA in the CS.  You could allow the SRS to choose, but actually, I’d say require 5104.
>>
>> I mention the SRS first because it is generally the most capable device, and the one there are the fewest of.
>>
>> SRCs may be incorporated into all sorts of things, some fairly limited.
>>
>> If an SRC is just relaying the frame refresh requests, it may be easier for it to only support what the CS supports rather than interworking two mechanisms.
>>
>> But I haven't thought through fully whether there are problems with this.
>>
>> 	Thanks,
>> 	Paul
>>
>>> Brian
>>>
>>> On Dec 4, 2013, at 10:34 AM, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>>>
>>>> On 12/3/13 1:32 PM, Simon Farrow wrote:
>>>>
>>>>> In the i3 document the following text was added to help address the issue
>>>>> but to me this does help the SIPREC specification
>>>>> "User Agents in the ESInet must support both RFC5104 [160] and RFC5168 [161]
>>>>> for full frame refresh requests.  The RFC5104 RTCP method is preferred with
>>>>> fall back to RFC5168 INFO method when the sender does not implement RFC5104"
>>>>
>>>> ISTM that we need to have some text about how to deal with the two mechanisms. I don't think we can require UAs in the CS to support both mechanisms. So I think we must make it a requirement on the SRC and/or the SRS to deal with interworking.
>>>>
>>>> ISTM that we can reasonably put a requirement on the SRS to support both mechanisms.
>>>>
>>>> 	Thanks,
>>>> 	Paul
>>>>
>>>> _______________________________________________
>>>> siprec mailing list
>>>> siprec@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/siprec
>>>
>>>
>>
>
>


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Subject: [siprec] I-D Action: draft-ietf-siprec-architecture-11.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the SIP Recording Working Group of the IETF.

	Title           : An Architecture for Media Recording using the Session In=
itiation Protocol
	Author(s)       : Andrew Hutton
                          Leon Portman
                          Rajnish Jain
                          Ken Rehor
	Filename        : draft-ietf-siprec-architecture-11.txt
	Pages           : 16
	Date            : 2013-12-05

Abstract:
   Session recording is a critical requirement in many communications
   environments such as call centers and financial trading.  In some of
   these environments, all calls must be recorded for regulatory,
   compliance, and consumer protection reasons.  Recording of a session
   is typically performed by sending a copy of a media stream to a
   recording device.  This document describes architectures for
   deploying session recording solutions in an environment which is
   based on the Session Initiation Protocol (SIP).


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-siprec-architecture

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-siprec-architecture-11

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-siprec-architecture-11


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
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From eckelcu@cisco.com  Tue Dec 10 01:46:02 2013
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From: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>, Brian Rosen <br@brianrosen.net>
Thread-Topic: [siprec] Feedback from NENA ICE-8 Event
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I'm not sure we need to place any requirements on the SRC or SRS. We
currently recommend that SRCs, SRSs, and recording aware UAs support and
use FIR (RFC 5104). We mention the potential use of SIP INFO (RFC 5168)
but state it is to be used for backward compatibility purposes. FIR is
preferred. See section 8.1.7.1.
If the SRC does not support SIP INFO (RFC 5168) and a UA within a given CS
only supports SIP INFO, the SRC will not be able to record that CS. Video
might not even work in the first place. I think this a quality of
implementation question, not something SIPREC should mandate. Same for the
SRS. A mismatch in FIR/SIP INFO between the SRC and SRS should result in
the RS establishing as audio only in my opinion. We could make the
existing recommendation stronger, but I think it is fine as is.
Section 8.2 provides information on how an SRC and SRS should deal with
packet loss. I thought of this as covering the initial I-frame case, but
perhaps more details are needed here?

Cheers,
Charles

On 12/4/13 1:39 PM, "Paul Kyzivat" <pkyzivat@alum.mit.edu> wrote:

>On 12/4/13 1:31 PM, Brian Rosen wrote:
>> But, the SRC really, really wants to be able to get a FIR to the UA in
>>the CS.  Therefore, it has to support both.  No limitation of the SRC in
>>this regard can be made up by smarts in the SRS.  So the SRC has to
>>support both 5104 and 5168.  You could, I suppose say that if the SRC
>>knows, for sure, that each and every one of the UAs in the CS supports
>>one of them, then it doesn=B9t have to support the other.
>>
>> If the SRC supports both, then the SRS could, in theory, support
>>either.  I think that is a mistake.  It should support 5104, it=B9s a
>>better mechanism.  5168 documents an old mechanism.
>>
>> Interworking the two is pretty easy.  If you really think that it=B9s a
>>burden, then supporting both on the SRS would fix that.
>
>I'm thinking of a UA that acts as its own SRC. Maybe it only supports
>one of the mechanisms, so it knows the one it supports is used on the
>CS. So it can use that one on the RS too.
>
>	Thanks,
>	Paul
>
>> Brian
>>
>> On Dec 4, 2013, at 11:31 AM, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>>
>>> On 12/4/13 10:37 AM, Brian Rosen wrote:
>>>> Actually, I think you have to require the SRC to support both
>>>>mechanisms, because you want the best chance it can send a FIR to the
>>>>other UA in the CS.  You could allow the SRS to choose, but actually,
>>>>I=B9d say require 5104.
>>>
>>> I mention the SRS first because it is generally the most capable
>>>device, and the one there are the fewest of.
>>>
>>> SRCs may be incorporated into all sorts of things, some fairly limited.
>>>
>>> If an SRC is just relaying the frame refresh requests, it may be
>>>easier for it to only support what the CS supports rather than
>>>interworking two mechanisms.
>>>
>>> But I haven't thought through fully whether there are problems with
>>>this.
>>>
>>> 	Thanks,
>>> 	Paul
>>>
>>>> Brian
>>>>
>>>> On Dec 4, 2013, at 10:34 AM, Paul Kyzivat <pkyzivat@alum.mit.edu>
>>>>wrote:
>>>>
>>>>> On 12/3/13 1:32 PM, Simon Farrow wrote:
>>>>>
>>>>>> In the i3 document the following text was added to help address the
>>>>>>issue
>>>>>> but to me this does help the SIPREC specification
>>>>>> "User Agents in the ESInet must support both RFC5104 [160] and
>>>>>>RFC5168 [161]
>>>>>> for full frame refresh requests.  The RFC5104 RTCP method is
>>>>>>preferred with
>>>>>> fall back to RFC5168 INFO method when the sender does not implement
>>>>>>RFC5104"
>>>>>
>>>>> ISTM that we need to have some text about how to deal with the two
>>>>>mechanisms. I don't think we can require UAs in the CS to support
>>>>>both mechanisms. So I think we must make it a requirement on the SRC
>>>>>and/or the SRS to deal with interworking.
>>>>>
>>>>> ISTM that we can reasonably put a requirement on the SRS to support
>>>>>both mechanisms.
>>>>>
>>>>> 	Thanks,
>>>>> 	Paul
>>>>>
>>>>> _______________________________________________
>>>>> siprec mailing list
>>>>> siprec@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/siprec
>>>>
>>>>
>>>
>>
>>
>
>_______________________________________________
>siprec mailing list
>siprec@ietf.org
>https://www.ietf.org/mailman/listinfo/siprec


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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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You seem to be saying that, if video recording doesn't work, it's not =
our problem.

It's exactly our problem.  If someone wants to record video, and they =
engineer the system according to the eventual SIPREC RFC, it should work =
every time.  That's what the SIPREC RFC is for.

Dave

-----Original Message-----
From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Charles Eckel =
(eckelcu)
Sent: 10 December 2013 09:46
To: Paul Kyzivat; Brian Rosen
Cc: siprec@ietf.org
Subject: Re: [siprec] Feedback from NENA ICE-8 Event

I'm not sure we need to place any requirements on the SRC or SRS. We
currently recommend that SRCs, SRSs, and recording aware UAs support and
use FIR (RFC 5104). We mention the potential use of SIP INFO (RFC 5168)
but state it is to be used for backward compatibility purposes. FIR is
preferred. See section 8.1.7.1.
If the SRC does not support SIP INFO (RFC 5168) and a UA within a given =
CS
only supports SIP INFO, the SRC will not be able to record that CS. =
Video
might not even work in the first place. I think this a quality of
implementation question, not something SIPREC should mandate. Same for =
the
SRS. A mismatch in FIR/SIP INFO between the SRC and SRS should result in
the RS establishing as audio only in my opinion. We could make the
existing recommendation stronger, but I think it is fine as is.
Section 8.2 provides information on how an SRC and SRS should deal with
packet loss. I thought of this as covering the initial I-frame case, but
perhaps more details are needed here?

Cheers,
Charles

On 12/4/13 1:39 PM, "Paul Kyzivat" <pkyzivat@alum.mit.edu> wrote:

>On 12/4/13 1:31 PM, Brian Rosen wrote:
>> But, the SRC really, really wants to be able to get a FIR to the UA =
in
>>the CS.  Therefore, it has to support both.  No limitation of the SRC =
in
>>this regard can be made up by smarts in the SRS.  So the SRC has to
>>support both 5104 and 5168.  You could, I suppose say that if the SRC
>>knows, for sure, that each and every one of the UAs in the CS supports
>>one of them, then it doesn=B9t have to support the other.
>>
>> If the SRC supports both, then the SRS could, in theory, support
>>either.  I think that is a mistake.  It should support 5104, it=B9s a
>>better mechanism.  5168 documents an old mechanism.
>>
>> Interworking the two is pretty easy.  If you really think that it=B9s =
a
>>burden, then supporting both on the SRS would fix that.
>
>I'm thinking of a UA that acts as its own SRC. Maybe it only supports
>one of the mechanisms, so it knows the one it supports is used on the
>CS. So it can use that one on the RS too.
>
>	Thanks,
>	Paul
>
>> Brian
>>
>> On Dec 4, 2013, at 11:31 AM, Paul Kyzivat <pkyzivat@alum.mit.edu> =
wrote:
>>
>>> On 12/4/13 10:37 AM, Brian Rosen wrote:
>>>> Actually, I think you have to require the SRC to support both
>>>>mechanisms, because you want the best chance it can send a FIR to =
the
>>>>other UA in the CS.  You could allow the SRS to choose, but =
actually,
>>>>I=B9d say require 5104.
>>>
>>> I mention the SRS first because it is generally the most capable
>>>device, and the one there are the fewest of.
>>>
>>> SRCs may be incorporated into all sorts of things, some fairly =
limited.
>>>
>>> If an SRC is just relaying the frame refresh requests, it may be
>>>easier for it to only support what the CS supports rather than
>>>interworking two mechanisms.
>>>
>>> But I haven't thought through fully whether there are problems with
>>>this.
>>>
>>> 	Thanks,
>>> 	Paul
>>>
>>>> Brian
>>>>
>>>> On Dec 4, 2013, at 10:34 AM, Paul Kyzivat <pkyzivat@alum.mit.edu>
>>>>wrote:
>>>>
>>>>> On 12/3/13 1:32 PM, Simon Farrow wrote:
>>>>>
>>>>>> In the i3 document the following text was added to help address =
the
>>>>>>issue
>>>>>> but to me this does help the SIPREC specification
>>>>>> "User Agents in the ESInet must support both RFC5104 [160] and
>>>>>>RFC5168 [161]
>>>>>> for full frame refresh requests.  The RFC5104 RTCP method is
>>>>>>preferred with
>>>>>> fall back to RFC5168 INFO method when the sender does not =
implement
>>>>>>RFC5104"
>>>>>
>>>>> ISTM that we need to have some text about how to deal with the two
>>>>>mechanisms. I don't think we can require UAs in the CS to support
>>>>>both mechanisms. So I think we must make it a requirement on the =
SRC
>>>>>and/or the SRS to deal with interworking.
>>>>>
>>>>> ISTM that we can reasonably put a requirement on the SRS to =
support
>>>>>both mechanisms.
>>>>>
>>>>> 	Thanks,
>>>>> 	Paul
>>>>>
>>>>> _______________________________________________
>>>>> siprec mailing list
>>>>> siprec@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/siprec
>>>>
>>>>
>>>
>>
>>
>
>_______________________________________________
>siprec mailing list
>siprec@ietf.org
>https://www.ietf.org/mailman/listinfo/siprec

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https://www.ietf.org/mailman/listinfo/siprec


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From eckelcu@cisco.com  Wed Dec 11 01:44:33 2013
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From DAVE.HIGTON@nice.com  Wed Dec 11 02:43:03 2013
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Subject: Re: [siprec] Feedback from NENA ICE-8 Event
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Hi Charles,

We have to look at the system as a whole.  The system has to be engineered =
so that all required recording takes place to an adequate standard; conform=
ance to various RFCs is required in order to guarantee this.  In turn, conf=
ormance to those RFCs should be sufficient to guarantee adequate results.

The SRS has to be engineered to record all the media that the customer want=
s to record.  If the communications system is prepared to negotiate a video=
 codec and the customer wants to record the video of the CS, the SRS and SR=
C must be engineered and provisioned to work together in terms of the codec=
s and/or transcoding.

It's worth pointing out, as you say, that one of the options must be true: =
either the SRS supports all the codecs that the SRC does, or the SRC transc=
odes as necessary.

It all hangs on the conditional "if recording is required" - but isn't that=
 true by definition, otherwise the SIPREC RFC wouldn't be in consideration?

Dave

-----Original Message-----
From: Charles Eckel (eckelcu) [mailto:eckelcu@cisco.com]=20
Sent: 11 December 2013 09:44
To: Dave Higton; siprec@ietf.org
Subject: Re: [siprec] Feedback from NENA ICE-8 Event

Hi Dave,

I see your point, and I do not necessarily disagree. SIPREC
interoperability is obviously important to me as well. However, we did not
go so far as to mandate support for specific audio codecs or specific
video codecs. What if the CS is negotiated to use codecs the SRS does not
support? Do we need to mandate the SRC to transcode, or mandate support
for a common set of codecs? I was lumping support for FIR and/or SIP INFO
into quality of implementation decisions rather than things we need to
mandate. The current spec provides the guidance I mentioned but does not
provide any strict requirements. The recent findings at the NENA event are
making me rethink this position, so I am happy to hear more about you and
others think.

Cheers,
Charles

On 12/10/13 11:50 AM, "Dave Higton" <DAVE.HIGTON@nice.com> wrote:

>You seem to be saying that, if video recording doesn't work, it's not our
>problem.
>
>It's exactly our problem.  If someone wants to record video, and they
>engineer the system according to the eventual SIPREC RFC, it should work
>every time.  That's what the SIPREC RFC is for.
>
>Dave
>
>-----Original Message-----
>From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Charles Eckel
>(eckelcu)
>Sent: 10 December 2013 09:46
>To: Paul Kyzivat; Brian Rosen
>Cc: siprec@ietf.org
>Subject: Re: [siprec] Feedback from NENA ICE-8 Event
>
>I'm not sure we need to place any requirements on the SRC or SRS. We
>currently recommend that SRCs, SRSs, and recording aware UAs support and
>use FIR (RFC 5104). We mention the potential use of SIP INFO (RFC 5168)
>but state it is to be used for backward compatibility purposes. FIR is
>preferred. See section 8.1.7.1.
>If the SRC does not support SIP INFO (RFC 5168) and a UA within a given CS
>only supports SIP INFO, the SRC will not be able to record that CS. Video
>might not even work in the first place. I think this a quality of
>implementation question, not something SIPREC should mandate. Same for the
>SRS. A mismatch in FIR/SIP INFO between the SRC and SRS should result in
>the RS establishing as audio only in my opinion. We could make the
>existing recommendation stronger, but I think it is fine as is.
>Section 8.2 provides information on how an SRC and SRS should deal with
>packet loss. I thought of this as covering the initial I-frame case, but
>perhaps more details are needed here?
>
>Cheers,
>Charles
>
>On 12/4/13 1:39 PM, "Paul Kyzivat" <pkyzivat@alum.mit.edu> wrote:
>
>>On 12/4/13 1:31 PM, Brian Rosen wrote:
>>> But, the SRC really, really wants to be able to get a FIR to the UA in
>>>the CS.  Therefore, it has to support both.  No limitation of the SRC in
>>>this regard can be made up by smarts in the SRS.  So the SRC has to
>>>support both 5104 and 5168.  You could, I suppose say that if the SRC
>>>knows, for sure, that each and every one of the UAs in the CS supports
>>>one of them, then it doesn=B9t have to support the other.
>>>
>>> If the SRC supports both, then the SRS could, in theory, support
>>>either.  I think that is a mistake.  It should support 5104, it=B9s a
>>>better mechanism.  5168 documents an old mechanism.
>>>
>>> Interworking the two is pretty easy.  If you really think that it=B9s a
>>>burden, then supporting both on the SRS would fix that.
>>
>>I'm thinking of a UA that acts as its own SRC. Maybe it only supports
>>one of the mechanisms, so it knows the one it supports is used on the
>>CS. So it can use that one on the RS too.
>>
>>	Thanks,
>>	Paul
>>
>>> Brian
>>>
>>> On Dec 4, 2013, at 11:31 AM, Paul Kyzivat <pkyzivat@alum.mit.edu>
>>>wrote:
>>>
>>>> On 12/4/13 10:37 AM, Brian Rosen wrote:
>>>>> Actually, I think you have to require the SRC to support both
>>>>>mechanisms, because you want the best chance it can send a FIR to the
>>>>>other UA in the CS.  You could allow the SRS to choose, but actually,
>>>>>I=B9d say require 5104.
>>>>
>>>> I mention the SRS first because it is generally the most capable
>>>>device, and the one there are the fewest of.
>>>>
>>>> SRCs may be incorporated into all sorts of things, some fairly
>>>>limited.
>>>>
>>>> If an SRC is just relaying the frame refresh requests, it may be
>>>>easier for it to only support what the CS supports rather than
>>>>interworking two mechanisms.
>>>>
>>>> But I haven't thought through fully whether there are problems with
>>>>this.
>>>>
>>>> 	Thanks,
>>>> 	Paul
>>>>
>>>>> Brian
>>>>>
>>>>> On Dec 4, 2013, at 10:34 AM, Paul Kyzivat <pkyzivat@alum.mit.edu>
>>>>>wrote:
>>>>>
>>>>>> On 12/3/13 1:32 PM, Simon Farrow wrote:
>>>>>>
>>>>>>> In the i3 document the following text was added to help address the
>>>>>>>issue
>>>>>>> but to me this does help the SIPREC specification
>>>>>>> "User Agents in the ESInet must support both RFC5104 [160] and
>>>>>>>RFC5168 [161]
>>>>>>> for full frame refresh requests.  The RFC5104 RTCP method is
>>>>>>>preferred with
>>>>>>> fall back to RFC5168 INFO method when the sender does not implement
>>>>>>>RFC5104"
>>>>>>
>>>>>> ISTM that we need to have some text about how to deal with the two
>>>>>>mechanisms. I don't think we can require UAs in the CS to support
>>>>>>both mechanisms. So I think we must make it a requirement on the SRC
>>>>>>and/or the SRS to deal with interworking.
>>>>>>
>>>>>> ISTM that we can reasonably put a requirement on the SRS to support
>>>>>>both mechanisms.
>>>>>>
>>>>>> 	Thanks,
>>>>>> 	Paul
>>>>>>
>>>>>> _______________________________________________
>>>>>> siprec mailing list
>>>>>> siprec@ietf.org
>>>>>> https://www.ietf.org/mailman/listinfo/siprec
>>>>>
>>>>>
>>>>
>>>
>>>
>>
>>_______________________________________________
>>siprec mailing list
>>siprec@ietf.org
>>https://www.ietf.org/mailman/listinfo/siprec
>
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From rmohanr@cisco.com  Mon Dec 16 22:50:42 2013
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From: "Ram Mohan R (rmohanr)" <rmohanr@cisco.com>
To: "siprec@ietf.org" <siprec@ietf.org>
Thread-Topic: Text on how often(soon)  SRC should send metadata/updates to SRS in protocol draft
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Subject: [siprec] Text on how often(soon) SRC should send metadata/updates to SRS in protocol draft
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When Paul and me were reviewing the metadata draft we were discussing on
how quickly a SRC has to send updates to SRS. The updates can any
update(of CS changes ) from SRC from SRS. Currently we don't have any
recommendation / text on this in Protocol or Metadata draft.


For example, Suppose there is a sequence of changes on a single
<participantstreamassoc> XML element as below:

T1: associate-time (A participant starts contributing to a stream)
 -- snapshot 1 sent from SRC to SRS
T2: disassociate-time ((A participant stops contributing to a stream)
T3: associate-time (starts contributing again)
-- snapshot 2
T4: disassociate
T5: associate
T6: disassociate
-- snapshot 3


Any of the above can happen. Ideally an SRC is expected to send snapshot
updates as soon as possible (i.e after every transaction of CS). We have
discussed this point earlier in mailing list.

The question is - Should we mandate this (MUST ?) with some text or just
add it as RECOMMENDATION. I am inclined with having it as RECOMMENDATION
and leave it to the implementors on deciding how soon they want to send
the updates from SRC to SRS.

In any case we need some text and I believe section 9 of Protocol draft
that talks about=20

Sending metadata from SRC to SRS is the right place to have this text.

Comments ?

Regards,
Ram


From rmohanr@cisco.com  Tue Dec 17 06:47:04 2013
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From: "Ram Mohan R (rmohanr)" <rmohanr@cisco.com>
To: "siprec@ietf.org" <siprec@ietf.org>
Thread-Topic: Including RFC 4235 XML schema inside SIPREC Metadata XML schema
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--_002_CED62E0E74504rmohanrciscocom_
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Hi all,

This is regarding including participant capabilities in Metadata from SRC
to SRS. We had discussed this item in the past and the agreement was to
include the  parts of XML schema of RFC 4235 inside the SIPREC metadata
XML schema to represent participant capabilities.
Look here for some discussions -
http://www.ietf.org/mail-archive/web/siprec/current/msg02307.html.
This is already updated in the Metadata model, however we missed to
incorporate this to SIPREC XML schema.

Below is the updated participant schema by including participant
capabilities from RFC 4235. Let me know your opinion on this. If WG agrees
to the above I will incorporate this in next revision.


1)  RFC 4235 schema is defined here
http://www.iana.org/assignments/xml-registry/schema/dialog-info.xsd

2) As our current requirement is only to include participant parameters
which represent the participant capabilities in SIPREC schema, we need to
import only the <param> element ofdialog-info.xsd.

3) That can be done as follows. I am showing only snippets of schema. The
complete schema(validated) is attached to the email

<xs:import namespace=3D'dialog-info:param:data'
   =20
schemaLocation=3D'http://iana.org/assignments/xml-registry/schema/dialog-in=
fo
.xsd'/>
=8A..
=8A.
<xs:element name=3D'participant-param'>
 <xs:complexType>
  <xs:sequence xmlns:data=3D'dialog-info:params:data'>
    <xs:element ref=3D'data:param'/>
  </xs:sequence>
 </xs:complexType>
  </xs:element>


4) And since metadata model allows a participant to have zero or more
capabilities, we need to allow the same in the participant XML element. So
the
updated participant element schema will be:

<xs:complexType name=3D"participant">
  <xs:sequence>
     <xs:element name=3D"nameID" type=3D"tns:nameID" maxOccurs=3D'unbounded=
'/>
     <xs:element name=3D"partipant-param" type=3D"tns:participant-param"
      minOccurs=3D'0' maxOccurs=3D'unbounded'/>
     <xs:any namespace=3D'##other' minOccurs=3D'0' maxOccurs=3D'unbounded'
     processContents=3D'lax'/>
  </xs:sequence>
 <xs:attribute name=3D"participant_id" type=3D"xs:base64Binary"
 use=3D"required"/>
</xs:complexType>

5) A sample instance of participant element with this kind of schema would
be:

<participant  participant_id=3D"zSfPoSvdSDCmU3A3TRDxAw=3D=3D">
   <nameID aor=3Dsip:Bob@biloxy.com>
      <name xml:lang=3D"it">Bob</name>
  </nameID>
 <param pname=3D"isfocus" pval=3D"true"/>
           </participant>



A question here - Does the WG see a need to import any other parts
RFC4235 schema other than <param> element ?



Regards,
Ram


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From andrew.hutton@unify.com  Mon Dec 23 07:24:18 2013
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From: "Hutton, Andrew" <andrew.hutton@unify.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>, "siprec@ietf.org" <siprec@ietf.org>
Thread-Topic: [siprec] Reminder: Additional use cases for draft-kyzivat-siprec-conference-use-cases-00
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Date: Mon, 23 Dec 2013 15:24:08 +0000
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Subject: Re: [siprec] Reminder: Additional use cases for	draft-kyzivat-siprec-conference-use-cases-00
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Hi All,

Since nobody posted any new uses cases I went back to our discussion in Van=
couver and tried to see what we appeared to have consensus on in the meetin=
g.

>From that I have formed a proposal for a charter update which is given belo=
w and also attached (with changes highlighted).

It seems everybody agreed that we need to clarify that SIPREC is limited to=
 SIP based systems and that MSRP recording needs to be added.

It also seemed to me that there was no consensus on adding the generic case=
 of document/application sharing but if this was limited to being a video s=
ession in which the content type (RFC 4796) formed part of the metadata the=
n probably we would have consensus.  So I included a suggested reference to=
 this as a milestone please comment on whether this makes sense.

There was a lot of discussion in the Vancouver meeting about defining a gen=
eric mechanism to record media without the need to come back to SIPREC ever=
y time new media types or metadata needs to be recorded.  There has been no=
 use cases submitted or discussion on possible mechanism since the meeting =
so I see no way to progress this at present.


Please can provide comments and Paul and others who stated they would contr=
ibute can you confirm that you still intend to do so and that this charter =
proposal is acceptable to you.

Regards
Andy



=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
SUGGESTED CHARTER - UPDATE
=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

Session recording is a critical requirement in many business communications=
 environments such as call centers and financial trading floors. In some of=
 these environments, all calls must be recorded for regulatory and complian=
ce reasons. In others, calls may be recorded for quality control, business =
analytics, or consumer protection. Recording is typically done by sending a=
 copy of the media to the recording devices. The working group will determi=
ne requirements and produce a specification for a protocol that will manage=
 delivery of media, in SIP based systems (including audio, video, MSRP inst=
ant message sessions) from an end-point that originates media, or that has =
access to it, to a recording device. PBX and recording vendors today implem=
ent proprietary, incompatible mechanisms to facilitate recording. A standar=
d protocol will reduce the complexity and cost of providing such recording =
services.

The group will define these issues and rationalize with IETF standards and =
practices. This includes encryption, NAT traversal, operations and manageab=
ility, SIP-enabled firewalls, authorization, and security.
The scope explicitly does not include recording any of the extended session=
 attributes being defined by the CLUE WG. (These may be addressed by a subs=
equent effort.)=20

The group will produce:

* Updated Requirements, Use Cases, Architecture draft

* Specification for Session Recording Protocol and Metadata

Milestones=20

DONE   	Use Cases and Requirements to IESG as Informational RFC=20
MAR 2014 	Submit Architecture to IESG as Informational RFC=20
JUN 2014 	Submit protocol draft to IESG as Proposed Standard RFC=20
AUG 2014 	Submit Metadata model and format to IESG as Proposed Standard RFC=
=20
AUG 2014 	Submit SIPREC Call Flows draft to IESG as an informational RFC=20
??? 2014 	Conference Recording Use Cases and Requirements to IESG as Inform=
ational RFC=20
??? 2014 	Conference Recording Architecture to IESG as Informational RFC=20
??? 2014 	Protocol and metadata for MSRP recording to IESG as Proposed Stan=
dard RFC=20
??? 2014 	Protocol and metadata for capturing the content (RFC 4796) of the=
 media stream.=20


=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=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



> -----Original Message-----
> From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Paul Kyzivat
> Sent: 21 November 2013 18:44
> To: siprec@ietf.org
> Subject: Re: [siprec] Reminder: Additional use cases for draft-kyzivat-
> siprec-conference-use-cases-00
>=20
> I still haven't seen anything on this subject.
> I *thought* there were multiple people in the siprec session in
> Vancouver that seemed to have other use cases related to media.
>=20
> If so, better speak up, or IIUC we are going to treat the use cases we
> have as bounding the new scope.
>=20
> 	Thanks,
> 	Paul
>=20
> On 11/15/13 9:31 AM, Paul Kyzivat wrote:
> > One of the action items from the meeting last week was:
> >
> >> chairs: use cases to the list in the next couple of weeks.  After
> that,
> >> we will decide if we need charter language.  If your use case is not
> >> contributed, it will not be considered in the milestones.
> >
> > The above is a little vague about the timing. Two weeks from the end
> of
> > the meeting would be Friday, November 23. (Hopefully the chairs will
> > clarify this.)
> >
> > This is important because there was some desire to tighten up the
> scope
> > of the rechartering to encompass only the mentioned use cases.
> >
> > I'll be happy to incorporate additional popular use cases even before
> > this draft becomes a wg draft. (But please send text.)
> >
> > While the name of the draft is about conferences, the use cases
> include
> > additional media support. (Maybe we should rename the draft.) And it
> > seemed that much of the interest was about additional media.
> >
> >      Thanks,
> >      Paul
> >
> >
> > _______________________________________________
> > siprec mailing list
> > siprec@ietf.org
> > https://www.ietf.org/mailman/listinfo/siprec
> >
>=20
> _______________________________________________
> siprec mailing list
> siprec@ietf.org
> https://www.ietf.org/mailman/listinfo/siprec

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From partha@parthasarathi.co.in  Wed Dec 25 06:32:32 2013
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From: "Parthasarathi R" <partha@parthasarathi.co.in>
To: "'Hutton, Andrew'" <andrew.hutton@unify.com>, "'Paul Kyzivat'" <pkyzivat@alum.mit.edu>, <siprec@ietf.org>
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Date: Wed, 25 Dec 2013 20:02:16 +0530
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Subject: Re: [siprec] Reminder: Additional use cases	for	draft-kyzivat-siprec-conference-use-cases-00
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Hi Andy,

The updated charter looks good to me.

I can contribute on MSRP recording by providing the review comments.

Thanks
Partha

> -----Original Message-----
> From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Hutton,
> Andrew
> Sent: Monday, December 23, 2013 8:54 PM
> To: Paul Kyzivat; siprec@ietf.org
> Subject: Re: [siprec] Reminder: Additional use cases for draft-kyzivat-
> siprec-conference-use-cases-00
> 
> Hi All,
> 
> Since nobody posted any new uses cases I went back to our discussion in
> Vancouver and tried to see what we appeared to have consensus on in the
> meeting.
> 
> From that I have formed a proposal for a charter update which is given
> below and also attached (with changes highlighted).
> 
> It seems everybody agreed that we need to clarify that SIPREC is
> limited to SIP based systems and that MSRP recording needs to be added.
> 
> It also seemed to me that there was no consensus on adding the generic
> case of document/application sharing but if this was limited to being a
> video session in which the content type (RFC 4796) formed part of the
> metadata then probably we would have consensus.  So I included a
> suggested reference to this as a milestone please comment on whether
> this makes sense.
> 
> There was a lot of discussion in the Vancouver meeting about defining a
> generic mechanism to record media without the need to come back to
> SIPREC every time new media types or metadata needs to be recorded.
> There has been no use cases submitted or discussion on possible
> mechanism since the meeting so I see no way to progress this at
> present.
> 
> 
> Please can provide comments and Paul and others who stated they would
> contribute can you confirm that you still intend to do so and that this
> charter proposal is acceptable to you.
> 
> Regards
> Andy
> 
> 
> 
> =====================================
> SUGGESTED CHARTER - UPDATE
> =====================================
> 
> Session recording is a critical requirement in many business
> communications environments such as call centers and financial trading
> floors. In some of these environments, all calls must be recorded for
> regulatory and compliance reasons. In others, calls may be recorded for
> quality control, business analytics, or consumer protection. Recording
> is typically done by sending a copy of the media to the recording
> devices. The working group will determine requirements and produce a
> specification for a protocol that will manage delivery of media, in SIP
> based systems (including audio, video, MSRP instant message sessions)
> from an end-point that originates media, or that has access to it, to a
> recording device. PBX and recording vendors today implement
> proprietary, incompatible mechanisms to facilitate recording. A
> standard protocol will reduce the complexity and cost of providing such
> recording services.
> 
> The group will define these issues and rationalize with IETF standards
> and practices. This includes encryption, NAT traversal, operations and
> manageability, SIP-enabled firewalls, authorization, and security.
> The scope explicitly does not include recording any of the extended
> session attributes being defined by the CLUE WG. (These may be
> addressed by a subsequent effort.)
> 
> The group will produce:
> 
> * Updated Requirements, Use Cases, Architecture draft
> 
> * Specification for Session Recording Protocol and Metadata
> 
> Milestones
> 
> DONE   	Use Cases and Requirements to IESG as Informational RFC
> MAR 2014 	Submit Architecture to IESG as Informational RFC
> JUN 2014 	Submit protocol draft to IESG as Proposed Standard RFC
> AUG 2014 	Submit Metadata model and format to IESG as Proposed
> Standard RFC
> AUG 2014 	Submit SIPREC Call Flows draft to IESG as an informational
> RFC
> ??? 2014 	Conference Recording Use Cases and Requirements to IESG as
> Informational RFC
> ??? 2014 	Conference Recording Architecture to IESG as Informational
> RFC
> ??? 2014 	Protocol and metadata for MSRP recording to IESG as
> Proposed Standard RFC
> ??? 2014 	Protocol and metadata for capturing the content (RFC 4796)
> of the media stream.
> 
> 
> =======================================================================
> =====================
> 
> 
> 
> > -----Original Message-----
> > From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Paul
> > Kyzivat
> > Sent: 21 November 2013 18:44
> > To: siprec@ietf.org
> > Subject: Re: [siprec] Reminder: Additional use cases for
> > draft-kyzivat- siprec-conference-use-cases-00
> >
> > I still haven't seen anything on this subject.
> > I *thought* there were multiple people in the siprec session in
> > Vancouver that seemed to have other use cases related to media.
> >
> > If so, better speak up, or IIUC we are going to treat the use cases
> we
> > have as bounding the new scope.
> >
> > 	Thanks,
> > 	Paul
> >
> > On 11/15/13 9:31 AM, Paul Kyzivat wrote:
> > > One of the action items from the meeting last week was:
> > >
> > >> chairs: use cases to the list in the next couple of weeks.  After
> > that,
> > >> we will decide if we need charter language.  If your use case is
> > >> not contributed, it will not be considered in the milestones.
> > >
> > > The above is a little vague about the timing. Two weeks from the
> end
> > of
> > > the meeting would be Friday, November 23. (Hopefully the chairs
> will
> > > clarify this.)
> > >
> > > This is important because there was some desire to tighten up the
> > scope
> > > of the rechartering to encompass only the mentioned use cases.
> > >
> > > I'll be happy to incorporate additional popular use cases even
> > > before this draft becomes a wg draft. (But please send text.)
> > >
> > > While the name of the draft is about conferences, the use cases
> > include
> > > additional media support. (Maybe we should rename the draft.) And
> it
> > > seemed that much of the interest was about additional media.
> > >
> > >      Thanks,
> > >      Paul
> > >
> > >
> > > _______________________________________________
> > > siprec mailing list
> > > siprec@ietf.org
> > > https://www.ietf.org/mailman/listinfo/siprec
> > >
> >
> > _______________________________________________
> > siprec mailing list
> > siprec@ietf.org
> > https://www.ietf.org/mailman/listinfo/siprec


From Yaron.Pdut@nice.com  Tue Dec 31 02:38:45 2013
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Hi,

Are there any preliminary plans to have siprec session at IETF 89 (London)?

Regards,
Yaron

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nk=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal>Hi,<o:p></o:p></=
p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Are there =
any preliminary plans to have siprec session at IETF 89 (London)? <o:p></o:=
p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Regard=
s,<o:p></o:p></p><p class=3DMsoNormal>Yaron<o:p></o:p></p></div></body></ht=
ml>=

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From andrew.hutton@unify.com  Tue Dec 31 03:43:41 2013
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From: "Hutton, Andrew" <andrew.hutton@unify.com>
To: "siprec@ietf.org" <siprec@ietf.org>
Thread-Topic: SIPREC Charter Update Proposal.
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Would like some more comments on the proposed charter update so I changed s=
ubject so it is more obvious what this is about.

Andy



-----Original Message-----
From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Hutton, Andrew
Sent: 23 December 2013 15:24
To: Paul Kyzivat; siprec@ietf.org
Subject: Re: [siprec] Reminder: Additional use cases for draft-kyzivat-sipr=
ec-conference-use-cases-00

Hi All,

Since nobody posted any new uses cases I went back to our discussion in Van=
couver and tried to see what we appeared to have consensus on in the meetin=
g.

>From that I have formed a proposal for a charter update which is given belo=
w and also attached (with changes highlighted).

It seems everybody agreed that we need to clarify that SIPREC is limited to=
 SIP based systems and that MSRP recording needs to be added.

It also seemed to me that there was no consensus on adding the generic case=
 of document/application sharing but if this was limited to being a video s=
ession in which the content type (RFC 4796) formed part of the metadata the=
n probably we would have consensus.  So I included a suggested reference to=
 this as a milestone please comment on whether this makes sense.

There was a lot of discussion in the Vancouver meeting about defining a gen=
eric mechanism to record media without the need to come back to SIPREC ever=
y time new media types or metadata needs to be recorded.  There has been no=
 use cases submitted or discussion on possible mechanism since the meeting =
so I see no way to progress this at present.


Please can provide comments and Paul and others who stated they would contr=
ibute can you confirm that you still intend to do so and that this charter =
proposal is acceptable to you.

Regards
Andy



=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
SUGGESTED CHARTER - UPDATE
=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

Session recording is a critical requirement in many business communications=
 environments such as call centers and financial trading floors. In some of=
 these environments, all calls must be recorded for regulatory and complian=
ce reasons. In others, calls may be recorded for quality control, business =
analytics, or consumer protection. Recording is typically done by sending a=
 copy of the media to the recording devices. The working group will determi=
ne requirements and produce a specification for a protocol that will manage=
 delivery of media, in SIP based systems (including audio, video, MSRP inst=
ant message sessions) from an end-point that originates media, or that has =
access to it, to a recording device. PBX and recording vendors today implem=
ent proprietary, incompatible mechanisms to facilitate recording. A standar=
d protocol will reduce the complexity and cost of providing such recording =
services.

The group will define these issues and rationalize with IETF standards and =
practices. This includes encryption, NAT traversal, operations and manageab=
ility, SIP-enabled firewalls, authorization, and security.
The scope explicitly does not include recording any of the extended session=
 attributes being defined by the CLUE WG. (These may be addressed by a subs=
equent effort.)=20

The group will produce:

* Updated Requirements, Use Cases, Architecture draft

* Specification for Session Recording Protocol and Metadata

Milestones=20

DONE   	Use Cases and Requirements to IESG as Informational RFC=20
MAR 2014 	Submit Architecture to IESG as Informational RFC=20
JUN 2014 	Submit protocol draft to IESG as Proposed Standard RFC=20
AUG 2014 	Submit Metadata model and format to IESG as Proposed Standard RFC=
=20
AUG 2014 	Submit SIPREC Call Flows draft to IESG as an informational RFC=20
??? 2014 	Conference Recording Use Cases and Requirements to IESG as Inform=
ational RFC=20
??? 2014 	Conference Recording Architecture to IESG as Informational RFC=20
??? 2014 	Protocol and metadata for MSRP recording to IESG as Proposed Stan=
dard RFC=20
??? 2014 	Protocol and metadata for capturing the content (RFC 4796) of the=
 media stream.=20


=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=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



> -----Original Message-----
> From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Paul Kyzivat
> Sent: 21 November 2013 18:44
> To: siprec@ietf.org
> Subject: Re: [siprec] Reminder: Additional use cases for draft-kyzivat-
> siprec-conference-use-cases-00
>=20
> I still haven't seen anything on this subject.
> I *thought* there were multiple people in the siprec session in
> Vancouver that seemed to have other use cases related to media.
>=20
> If so, better speak up, or IIUC we are going to treat the use cases we
> have as bounding the new scope.
>=20
> 	Thanks,
> 	Paul
>=20
> On 11/15/13 9:31 AM, Paul Kyzivat wrote:
> > One of the action items from the meeting last week was:
> >
> >> chairs: use cases to the list in the next couple of weeks.  After
> that,
> >> we will decide if we need charter language.  If your use case is not
> >> contributed, it will not be considered in the milestones.
> >
> > The above is a little vague about the timing. Two weeks from the end
> of
> > the meeting would be Friday, November 23. (Hopefully the chairs will
> > clarify this.)
> >
> > This is important because there was some desire to tighten up the
> scope
> > of the rechartering to encompass only the mentioned use cases.
> >
> > I'll be happy to incorporate additional popular use cases even before
> > this draft becomes a wg draft. (But please send text.)
> >
> > While the name of the draft is about conferences, the use cases
> include
> > additional media support. (Maybe we should rename the draft.) And it
> > seemed that much of the interest was about additional media.
> >
> >      Thanks,
> >      Paul
> >
> >
> > _______________________________________________
> > siprec mailing list
> > siprec@ietf.org
> > https://www.ietf.org/mailman/listinfo/siprec
> >
>=20
> _______________________________________________
> siprec mailing list
> siprec@ietf.org
> https://www.ietf.org/mailman/listinfo/siprec

From andrew.hutton@unify.com  Tue Dec 31 03:47:54 2013
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From: "Hutton, Andrew" <andrew.hutton@unify.com>
To: Yaron Pdut <Yaron.Pdut@nice.com>, "siprec@ietf.org" <siprec@ietf.org>
Thread-Topic: SIPREC Meeting (or NOT) at IETF89
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Good question.

We have to decide by the 17th of January whether to request meeting time.

We need more comments/opinions regarding the proposed updated charter text.

At present it is not clear whether we need meeting time in London so I woul=
d ask people who have an opinion on this and especially if you want to pres=
ent something to let the chairs know over the next couple of weeks.

Regards
Andy (SIPREC Co-Chair).




From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Yaron Pdut
Sent: 31 December 2013 10:39
To: siprec@ietf.org
Subject: [siprec] SIPREC Meeting (or NOT) at IETF89

Hi,

Are there any preliminary plans to have siprec session at IETF 89 (London)?

Regards,
Yaron

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Good question.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">We have to decide by t=
he 17<sup>th</sup> of January whether to request meeting time.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">We need more comments/=
opinions regarding the proposed updated charter text.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">At present it is not c=
lear whether we need meeting time in London so I would ask people who have =
an opinion on this and especially if you want to present something to let t=
he chairs know over the next couple
 of weeks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Regards<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Andy (SIPREC Co-Chair)=
.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> siprec [=
mailto:siprec-bounces@ietf.org]
<b>On Behalf Of </b>Yaron Pdut<br>
<b>Sent:</b> 31 December 2013 10:39<br>
<b>To:</b> siprec@ietf.org<br>
<b>Subject:</b> [siprec] SIPREC Meeting (or NOT) at IETF89<o:p></o:p></span=
></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Hi,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Are there any preliminary plans to have siprec sessi=
on at IETF 89 (London)?
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Regards,<o:p></o:p></p>
<p class=3D"MsoNormal">Yaron<o:p></o:p></p>
</div>
</div>
</body>
</html>

--_000_9F33F40F6F2CD847824537F3C4E37DDF17C8D287MCHP04MSXglobal_--

From Yaron.Pdut@nice.com  Tue Dec 31 03:54:33 2013
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From: Yaron Pdut <Yaron.Pdut@nice.com>
To: "Hutton, Andrew" <andrew.hutton@unify.com>, "siprec@ietf.org" <siprec@ietf.org>
Date: Tue, 31 Dec 2013 13:54:21 +0200
Thread-Topic: SIPREC Meeting (or NOT) at IETF89
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What about discussing future direction of SIPREC in perspective to rtcweb?
I know that rtcweb is about media and not signaling.

Maybe it is time to introduce some use cases for WebRTC and see how it may =
effect or integrate with current architecture?
I can think of webrtc data channel recording as a topic, for example.

Yaron

From: Hutton, Andrew [mailto:andrew.hutton@unify.com]
Sent: =E9=E5=ED =E2, 31 =E3=F6=EE=E1=F8 2013 13:48
To: Yaron Pdut; siprec@ietf.org
Subject: RE: SIPREC Meeting (or NOT) at IETF89

Good question.

We have to decide by the 17th of January whether to request meeting time.

We need more comments/opinions regarding the proposed updated charter text.

At present it is not clear whether we need meeting time in London so I woul=
d ask people who have an opinion on this and especially if you want to pres=
ent something to let the chairs know over the next couple of weeks.

Regards
Andy (SIPREC Co-Chair).




From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Yaron Pdut
Sent: 31 December 2013 10:39
To: siprec@ietf.org<mailto:siprec@ietf.org>
Subject: [siprec] SIPREC Meeting (or NOT) at IETF89

Hi,

Are there any preliminary plans to have siprec session at IETF 89 (London)?

Regards,
Yaron

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<html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr=
osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" =
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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue vli=
nk=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span style=3D'c=
olor:#1F497D'>What about discussing future direction of SIPREC in perspecti=
ve to rtcweb? <o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'col=
or:#1F497D'>I know that rtcweb is about media and not signaling.<o:p></o:p>=
</span></p><p class=3DMsoNormal><span style=3D'color:#1F497D'><o:p>&nbsp;</=
o:p></span></p><p class=3DMsoNormal><span style=3D'color:#1F497D'>Maybe it =
is time to introduce some use cases for WebRTC and see how it may effect or=
 integrate with current architecture?<o:p></o:p></span></p><p class=3DMsoNo=
rmal><span style=3D'color:#1F497D'>I can think of webrtc data channel recor=
ding as a topic, for example.<o:p></o:p></span></p><p class=3DMsoNormal><sp=
an style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal=
><span style=3D'color:#1F497D'>Yaron<o:p></o:p></span></p><p class=3DMsoNor=
mal><span style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><div><div sty=
le=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'=
><p class=3DMsoNormal><b><span style=3D'font-size:10.0pt;font-family:"Tahom=
a","sans-serif"'>From:</span></b><span style=3D'font-size:10.0pt;font-famil=
y:"Tahoma","sans-serif"'> Hutton, Andrew [mailto:andrew.hutton@unify.com] <=
br><b>Sent:</b> <span lang=3DHE dir=3DRTL>=E9=E5=ED</span><span dir=3DLTR><=
/span><span dir=3DLTR></span><span dir=3DLTR></span><span dir=3DLTR></span>=
&nbsp;<span lang=3DHE dir=3DRTL>=E2</span><span dir=3DLTR></span><span dir=
=3DLTR></span><span dir=3DLTR></span><span dir=3DLTR></span>, 31 <span lang=
=3DHE dir=3DRTL>=E3=F6=EE=E1=F8</span><span dir=3DLTR></span><span dir=3DLT=
R></span><span dir=3DLTR></span><span dir=3DLTR></span> 2013 13:48<br><b>To=
:</b> Yaron Pdut; siprec@ietf.org<br><b>Subject:</b> RE: SIPREC Meeting (or=
 NOT) at IETF89<o:p></o:p></span></p></div></div><p class=3DMsoNormal><o:p>=
&nbsp;</o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'>Good que=
stion.<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'color:#1F49=
7D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'color:#=
1F497D'>We have to decide by the 17<sup>th</sup> of January whether to requ=
est meeting time.<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'=
color:#1F497D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=
=3D'color:#1F497D'>We need more comments/opinions regarding the proposed up=
dated charter text.<o:p></o:p></span></p><p class=3DMsoNormal><span style=
=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span s=
tyle=3D'color:#1F497D'>At present it is not clear whether we need meeting t=
ime in London so I would ask people who have an opinion on this and especia=
lly if you want to present something to let the chairs know over the next c=
ouple of weeks.<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'co=
lor:#1F497D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=
=3D'color:#1F497D'>Regards<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>Andy (SIPREC Co-Chair).<o:p></o:p></span></p><p cla=
ss=3DMsoNormal><span style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p=
 class=3DMsoNormal><span style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></=
p><p class=3DMsoNormal><span style=3D'color:#1F497D'><o:p>&nbsp;</o:p></spa=
n></p><p class=3DMsoNormal><span style=3D'color:#1F497D'><o:p>&nbsp;</o:p><=
/span></p><div style=3D'border:none;border-left:solid blue 1.5pt;padding:0c=
m 0cm 0cm 4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF 1.=
0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span style=3D'font-=
size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style=
=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> siprec [<a href=3D=
"mailto:siprec-bounces@ietf.org">mailto:siprec-bounces@ietf.org</a>] <b>On =
Behalf Of </b>Yaron Pdut<br><b>Sent:</b> 31 December 2013 10:39<br><b>To:</=
b> <a href=3D"mailto:siprec@ietf.org">siprec@ietf.org</a><br><b>Subject:</b=
> [siprec] SIPREC Meeting (or NOT) at IETF89<o:p></o:p></span></p></div></d=
iv><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Hi,<o:p><=
/o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Are=
 there any preliminary plans to have siprec session at IETF 89 (London)? <o=
:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal=
>Regards,<o:p></o:p></p><p class=3DMsoNormal>Yaron<o:p></o:p></p></div></di=
v></body></html>=

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Hi Yaron,

The problem I see is that the scope of SIPREC is of course SIP based system=
s so discussing WebRTC related use cases is probable out of scope for SIPRE=
C and should be directed at RTCWeb.

If you think there are use cases that are within scope for SIPREC feel free=
 to initiate discussion on the SIPREC list we don=92t need to wait for a me=
eting to have a discussion.

Regards
Andy



From: Yaron Pdut [mailto:Yaron.Pdut@nice.com]
Sent: 31 December 2013 11:54
To: Hutton, Andrew; siprec@ietf.org
Subject: RE: SIPREC Meeting (or NOT) at IETF89

What about discussing future direction of SIPREC in perspective to rtcweb?
I know that rtcweb is about media and not signaling.

Maybe it is time to introduce some use cases for WebRTC and see how it may =
effect or integrate with current architecture?
I can think of webrtc data channel recording as a topic, for example.

Yaron

From: Hutton, Andrew [mailto:andrew.hutton@unify.com]
Sent: =E9=E5=ED =E2, 31 =E3=F6=EE=E1=F8 2013 13:48
To: Yaron Pdut; siprec@ietf.org<mailto:siprec@ietf.org>
Subject: RE: SIPREC Meeting (or NOT) at IETF89

Good question.

We have to decide by the 17th of January whether to request meeting time.

We need more comments/opinions regarding the proposed updated charter text.

At present it is not clear whether we need meeting time in London so I woul=
d ask people who have an opinion on this and especially if you want to pres=
ent something to let the chairs know over the next couple of weeks.

Regards
Andy (SIPREC Co-Chair).




From: siprec [mailto:siprec-bounces@ietf.org] On Behalf Of Yaron Pdut
Sent: 31 December 2013 10:39
To: siprec@ietf.org<mailto:siprec@ietf.org>
Subject: [siprec] SIPREC Meeting (or NOT) at IETF89

Hi,

Are there any preliminary plans to have siprec session at IETF 89 (London)?

Regards,
Yaron

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<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi Yaron,<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">The problem I see is t=
hat the scope of SIPREC is of course SIP based systems so discussing WebRTC=
 related use cases is probable out of scope for SIPREC and should be direct=
ed at RTCWeb.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">If you think there are=
 use cases that are within scope for SIPREC feel free to initiate discussio=
n on the SIPREC list we don=92t need to wait for a meeting to have a discus=
sion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Regards<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Andy<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Yaron Pd=
ut [mailto:Yaron.Pdut@nice.com]
<br>
<b>Sent:</b> 31 December 2013 11:54<br>
<b>To:</b> Hutton, Andrew; siprec@ietf.org<br>
<b>Subject:</b> RE: SIPREC Meeting (or NOT) at IETF89<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">What about discussing =
future direction of SIPREC in perspective to rtcweb?
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I know that rtcweb is =
about media and not signaling.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Maybe it is time to in=
troduce some use cases for WebRTC and see how it may effect or integrate wi=
th current architecture?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I can think of webrtc =
data channel recording as a topic, for example.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Yaron<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Hutton, =
Andrew [<a href=3D"mailto:andrew.hutton@unify.com">mailto:andrew.hutton@uni=
fy.com</a>]
<br>
<b>Sent:</b> <span lang=3D"HE" dir=3D"RTL">=E9=E5=ED</span><span dir=3D"LTR=
"></span><span dir=3D"LTR"></span>&nbsp;<span lang=3D"HE" dir=3D"RTL">=E2</=
span><span dir=3D"LTR"></span><span dir=3D"LTR"></span>, 31
<span lang=3D"HE" dir=3D"RTL">=E3=F6=EE=E1=F8</span><span dir=3D"LTR"></spa=
n><span dir=3D"LTR"></span> 2013 13:48<br>
<b>To:</b> Yaron Pdut; <a href=3D"mailto:siprec@ietf.org">siprec@ietf.org</=
a><br>
<b>Subject:</b> RE: SIPREC Meeting (or NOT) at IETF89<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Good question.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">We have to decide by t=
he 17<sup>th</sup> of January whether to request meeting time.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">We need more comments/=
opinions regarding the proposed updated charter text.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">At present it is not c=
lear whether we need meeting time in London so I would ask people who have =
an opinion on this and especially if you want to present something to let t=
he chairs know over the next couple
 of weeks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Regards<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Andy (SIPREC Co-Chair)=
.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> siprec [=
<a href=3D"mailto:siprec-bounces@ietf.org">mailto:siprec-bounces@ietf.org</=
a>]
<b>On Behalf Of </b>Yaron Pdut<br>
<b>Sent:</b> 31 December 2013 10:39<br>
<b>To:</b> <a href=3D"mailto:siprec@ietf.org">siprec@ietf.org</a><br>
<b>Subject:</b> [siprec] SIPREC Meeting (or NOT) at IETF89<o:p></o:p></span=
></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Hi,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Are there any preliminary plans to have siprec sessi=
on at IETF 89 (London)?
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Regards,<o:p></o:p></p>
<p class=3D"MsoNormal">Yaron<o:p></o:p></p>
</div>
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