Re: [MMUSIC] When a bundle offer is forked

"Parthasarathi R" <partha@parthasarathi.co.in> Thu, 23 May 2013 18:37 UTC

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From: "Parthasarathi R" <partha@parthasarathi.co.in>
To: "'Paul Kyzivat'" <pkyzivat@alum.mit.edu>, "'Emil Ivov'" <emcho@jitsi.org>
References: <7594FB04B1934943A5C02806D1A2204B1C374357@ESESSMB209.ericsson.se> <519A1336.9010001@jitsi.org> <9F33F40F6F2CD847824537F3C4E37DDF1159D127@MCHP04MSX.global-ad.net> <519A229D.7090204@jitsi.org> <7594FB04B1934943A5C02806D1A2204B1C374463@ESESSMB209.ericsson.se> <519A2768.5010904@alum.mit.edu> <CAPvvaa+A=LkYp9A+wENAABwCYaQcD0HVeX4o+O_16iJRPXZfNw@mail.gmail.com> <7594FB04B1934943A5C02806D1A2204B1C3744DC@ESESSMB209.ericsson.se> <CAPvvaaJsPNk1DAJXYoc8aUgZ0ZayV_8q84W=Mm7vwuRRGuwC-g@mail.gmail.com> <7594FB04B1934943A5C02806D1A2204B1C374572@ESESSMB209.ericsson.se> <519A3883.8060006@jitsi.org> <519A3C8F.3040309@alum.mit.edu> <519B343A.30704@jitsi.org> <519BB598.1030909@alum.mit.edu> <519DF0F8.1070407@jitsi.org> <519E530C.60705@alum.mit.edu>
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Date: Thu, 23 May 2013 23:47:15 +0530
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Cc: 'mmusic' <mmusic@ietf.org>, 'Christer Holmberg' <christer.holmberg@ericsson.com>
Subject: Re: [MMUSIC] When a bundle offer is forked
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Paul,

I agree with you that it takes more energy to solve bundle with forking.
Forking is not low probability event as of now in SIP deployments. I wish to
see the forking within the scope of this work.

Thanks
Partha 

> -----Original Message-----
> From: mmusic-bounces@ietf.org [mailto:mmusic-bounces@ietf.org] On
> Behalf Of Paul Kyzivat
> Sent: Thursday, May 23, 2013 11:04 PM
> To: Emil Ivov
> Cc: mmusic; Christer Holmberg
> Subject: [MMUSIC] When a bundle offer is forked
> 
> On 5/23/13 6:35 AM, Emil Ivov wrote:
> 
> > In case a bundle offer gets forked and various answers ...
> 
> I trimmed everything else out of Emil's reply, and changed to subject,
> because this is a whole different can of worms!
> 
> I think we must acknowledge that this *can* happen, though it is a low
> probability event. It raises all sorts of ugly issues. A few:
> 
> * if the bundle is accepted by multiple forks, does this form
>    one RTP session or several? If so,
> 
>    - if so, then if each fork accepts a different set of m-lines from
>      the bundle, how can that work with a single RTP session?
> 
> * How does ICE work in this case? (Is that already covered by ICE,
>    since it mostly isn't specific to bundle?
> 
> * If one fork adds/removes an m-line from the bundle, should that
>    be mirrored to the other forks?
> 
> * ...
> 
> ISTM that the simplest thing we could do about this is put a statement
> in the draft that this draft does not specify behavior in the case of
> forking - that conforming devices are constrained to a single fork, and
> that behavior in forking cases could be a subject of future
> standardization.
> 
> 	Thanks,
> 	Paul
> 
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