Subject: RE: Scenarios for draft-fair-ipdvb-req-04.txt

From: <[email-masked]>
Date: Fri, 26 Mar 2004 16:16:22 +0200

Hi All

As you are bringing together deployment scenarios, there are some fine use cases (aka scenarios) in:
http://www.ietf.org/internet-drafts/draft-ietf-mmusic-img-req-03.txt

If these are of benefit feel free to reuse.

Cheers, Rod.

> -----Original Message-----
> From: [email-masked] 
> [mailto:[email-masked]]On
> Behalf Of ext Gorry Fairhurst
> Sent: Friday, March 26, 2004 2:13 PM
> To: [email-masked]
> Subject: Re: Scenarios for draft-fair-ipdvb-req-04.txt
> 
> 
> 
> 
> Trying to draw together the security inputs suggests a 
> general need for more
> precise scenarios that exhibit different 
> properties/requirements, this also
> will be useful when describing other protocols used to build 
> the IP over
> MPEG service. Can I ask for inputs to help draw up this list 
> of scenarios?
> 
> 
> Here is a start (from looking through the mailing list):
> 
> 
> 1) Art's recent inputs to the security thread seem oriented 
> to TV-style
> networks ("contribution" and "broadcast").  In the broadcast context,
> transmission goes to many Receivers (unidirectional star) and 
> IP packets can
> be integrated with TV/radio transmission channels. The 
> broadcast part of the
> networks are characterised by a large population of receivers that may
> receive the same bit stream.
> 
> 2) Laurent Claverotte's focus was oriented to two-way 
> satellite IP provision
> - where the MPEG transmission network provides a physical & 
> link technology
> for a two-way star IP network (DVB-RCS). Organisation is 
> currently usually
> based around a star toplogy, in which a central hub station 
> acts as the
> gateway to the wider Internet.
> 
> Other scenarios include:
> 
> 3) Point-to-point network links can be used to connect 
> between Internet
> Service Providers - these typically have no TV content - and 
> use MPEG as
> just a physical & link technology, many use the same 
> technology (e.g. DVB-S)
> in both directions. Such networks are characterised by a 
> small number of
> receivers for each transmitted bit stream.
> 
> 4) Point-to-multipoint networks where the outbound link uses broadcast
> technology (possibly shared with TV/radio?) and the return 
> link uses some
> other technology (e.g. Modem, LMDS, GPRS, ...).  Such 
> networks could utilise
> UDLR protocols for routing [RFC3077].
> 
> Are there more important cases, that I have missed?
> 
> What about cable networks, cellular DVB-T, mobile DVB-T, mesh DVB-RCS?
> 
> 
> A typical usage could be:
> 
> End-host<-->IP network<-->IP network
>                                |
>                           IP gateway<->MPEG-2 network<-> Receiver
>                                                             |
>                                           End-host<-->IP network
> 
> Where the middle line represents the "MPEG-2" part of the 
> internet path, in
> this case  the end users are the people using the end-hosts.
> 
> 
> Gorry Fairhurst.
> 
>  
> 
>