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Re: [rtcweb] Drop RFC 4588 RTX session multiplexing support requirement from RTP USAGE

Colin Perkins <csp@csperkins.org> Mon, 27 October 2014 16:36 UTC

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From: Colin Perkins <csp@csperkins.org>
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Date: Mon, 27 Oct 2014 16:36:26 +0000
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Subject: Re: [rtcweb] Drop RFC 4588 RTX session multiplexing support requirement from RTP USAGE
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Hi,

On 21 Oct 2014, at 19:58, Sergio Garcia Murillo <sergio.garcia.murillo@gmail.com> wrote:
> Not sure if it is done on pourpose, but according to the RTP usage draft, it may seem that full RFC 4588 is mandated at the recevier side:
> 
>     Receivers are REQUIRED to implement support for RTP retransmission
>     packets [RFC4588].
> 
> That would include both modes, session and ssrc multiplexing. Given the extensive usage of bundle and current implementations, session multiplexing support doesn't make much sense.
> 
> Should we drop it, and state that only ssrc-multiplexing shall be     supported at the receiving end?

I don’t see any advantage to doing so, given that support for non-BUNDLE sessions is REQUIRED. You need to implement the signalling needed for session-multiplexing of retransmission packet anyway, so disallowing it buys you nothing.

-- 
Colin Perkins
https://csperkins.org/

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