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Re: [MMUSIC] Mod to draft-ietf-mmusic-rfc2326bis-40

"Schwarz, Albrecht (Albrecht)" <albrecht.schwarz@alcatel-lucent.com> Wed, 14 January 2015 08:55 UTC

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From: "Schwarz, Albrecht (Albrecht)" <albrecht.schwarz@alcatel-lucent.com>
To: Christian Groves <Christian.Groves@nteczone.com>, mmusic mailing list <mmusic@ietf.org>, Roni Even <ron.even.tlv@gmail.com>
Thread-Topic: [MMUSIC] Mod to draft-ietf-mmusic-rfc2326bis-40
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Date: Wed, 14 Jan 2015 08:55:04 +0000
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Subject: Re: [MMUSIC] Mod to draft-ietf-mmusic-rfc2326bis-40
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No objections from my side because the requirement as such is still sufficiently covered.
Thus, would support that change proposal.
-Albrecht

-----Original Message-----
From: mmusic [mailto:mmusic-bounces@ietf.org] On Behalf Of Christian Groves
Sent: Mittwoch, 14. Januar 2015 03:10
To: mmusic mailing list; Roni Even
Subject: [MMUSIC] Mod to draft-ietf-mmusic-rfc2326bis-40

Hello,

draft-ietf-mmusic-rfc2326bis-40
<https://datatracker.ietf.org/doc/draft-ietf-mmusic-rfc2326bis/> has been in state MISSREF for some time now. See below:

2014-02-11    draft-ietf-mmusic-rfc2326bis-40.txt [C214]
MISSREF*R(1G)
REF    draft-ietf-avtcore-rtp-circuit-breakers    NOT-RECEIVED
     draft-ietf-mmusic-rtsp-nat    IN-QUEUE
H. Schulzrinne, A. Rao, R. Lanphier, M. Westerlund, M. Stiemerling, Ed.
"Real Time Streaming Protocol 2.0 (RTSP)"
Bytes: 764018
Working Group: Multiparty Multimedia Session Control

There is still a dependency on draft-ietf-avtcore-rtp-circuit breakers which is holding up an RFC number being assigned. My understanding is that it could be quite awhile before the circuit breakers draft is approved.

There's only one reference to the circuit breakers draft in C.1.6.3 "Bit-rate adaption", i.e.
    To ensure that the implementation's adaptation mechanism has a well
    defined outer envelope, all implementations using a non-congestion
    controlled unicast transport protocol, like UDP, MUST implement
    Multimedia Congestion Control: Circuit Breakers for Unicast RTP
    Sessions [I-D.ietf-avtcore-rtp-circuit-breakers].

I wondering if it would be possible to change this slightly so that the circuit breakers draft becomes informative whilst still keeping the congestion control requirement as a MUST? i.e.
"... all implementations using a non-congestion controlled unicast transport protocol, like UDP, MUST implement multimedia congestion control. For example: by utilising the mechanism defined by "Multimedia Congestion Control: Circuit Breakers for Unicast RTP Sessions [I-D.ietf-avtcore-rtp-circuit-breakers]."

This would mean that RTSP2.0 could finally become an RFC.

Would this be possible?

Regards,
Christian


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