[AVT] RE: Review draft-ietf-avt-avpf-ccm-07
"Even, Roni" <roni.even@polycom.co.il> Mon, 30 July 2007 09:51 UTC
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Date: Mon, 30 Jul 2007 12:52:48 +0300
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Thread-Topic: Review draft-ietf-avt-avpf-ccm-07
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From: "Even, Roni" <roni.even@polycom.co.il>
To: Magnus Westerlund <magnus.westerlund@ericsson.com>
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Cc: bo.burman@ericsson.com, stewe@stewe.org, avt@ietf.org
Subject: [AVT] RE: Review draft-ietf-avt-avpf-ccm-07
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Magnus, Looks OK. Thanks Roni > -----Original Message----- > From: Magnus Westerlund [mailto:magnus.westerlund@ericsson.com] > Sent: Friday, July 27, 2007 3:58 AM > To: Even, Roni > Cc: avt@ietf.org; stewe@stewe.org; bo.burman@ericsson.com > Subject: Re: Review draft-ietf-avt-avpf-ccm-07 > > Hi Roni, > > Please see inline. > > Even, Roni skrev: > >> > 2. In 4.2.1.2 " If the media sender concludes that it can increase > the > > > > */ [RE:] I think a clarification will make sense. /* > > > > Okay, I will include the following: > > This should be done also for point-to-point sessions, as it not > guaranteed that a participant can determine correctly if the sources are > present in a single node and co-ordinated. > > > Is that okay? I only use should as it is strictly not needed if you are > convinced that you can correctly determine that the back-off is not > needed. > > > > >> > > > > */ [RE:] I am still not sure I understand. Example the offer includes > > tmmbr, tstr and fir. The answer responds with tstr only. /* > > > > */ Does it mean that the answerer may send tmmbr, tstr and fir but the > > offerer can only send tstr. /* > > > > */ Also if the above is right it will mean the answerer sending tmmbr > > will be able to process the response. /* > > > > Okay, I think there might be missing some word in there that these are > symmetric and both side need to announce support for it to be possible > to use it. These parameter does not make sense as declarative ones. > > Now the complete sectiond reads: > > 7.2. Offer-Answer > > The Offer/Answer [RFC3264] implications for codec control protocol > feedback messages are similar to those described in [RFC4585]. The > offerer MAY indicate the capability to support selected codec commands > and indications. The answerer MUST remove all ccm parameters > corresponding to the CCM messages that it does not support or does not > desire to be used in this particular media session. The answerer MUST > NOT add new ccm parameters in addition to what has been offered. The > answer is binding for the media session and both offerer and answerer > MUST only use feedback messages that both sides have explicitely > indicated in the messages. In others words only the joint subset of CCM > parameters from the offer and answer may be used. > > Note, that including a CCM parameter in an offer or answer indicates > that the agent (offerer or answerer) is at least capable of receiving > the corresponding CCM message(s) and act upon them. In cases when the > reception of a negotiated CCM messages mandates the agent to respond > with another CCM message, it also must have that capability. Although > not mandated to initiate CCM messages of any negotiated type it is > generally expected that the agent will initiate CCM messages when > suitable. > > The session maximum packet rate parameter part of the TMMBR indication > is declarative and everyone SHALL use the highest value indicated in a > response. If the session maximum packet rate parameter is not present > in an offer it SHALL NOT be included by the answerer. > > Cheers > > Magnus Westerlund > > IETF Transport Area Director & TSVWG Chair > ---------------------------------------------------------------------- > Multimedia Technologies, Ericsson Research EAB/TVM/M > ---------------------------------------------------------------------- > Ericsson AB | Phone +46 8 4048287 > Torshamsgatan 23 | Fax +46 8 7575550 > S-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com > ---------------------------------------------------------------------- _______________________________________________ Audio/Video Transport Working Group avt@ietf.org https://www1.ietf.org/mailman/listinfo/avt
- [AVT] Working group last call: draft-ietf-avt-avp… Even, Roni
- Re: [AVT] Working group last call: draft-ietf-avt… Keith Lantz
- Re: [AVT] Working group last call: draft-ietf-avt… Randell Jesup
- Re: [AVT] Working group last call: draft-ietf-avt… Magnus Westerlund
- [AVT] Review draft-ietf-avt-avpf-ccm-07 Even, Roni
- Re: [AVT] Review draft-ietf-avt-avpf-ccm-07 Randell Jesup
- RE: [AVT] Review draft-ietf-avt-avpf-ccm-07 Even, Roni
- [AVT] End of working group last call: draft-ietf-… Even, Roni
- Re: [AVT] Review draft-ietf-avt-avpf-ccm-07 Randell Jesup
- RE: [AVT] Review draft-ietf-avt-avpf-ccm-07 Even, Roni
- [AVT] Re: Review draft-ietf-avt-avpf-ccm-07 Magnus Westerlund
- [AVT] RE: Review draft-ietf-avt-avpf-ccm-07 Even, Roni
- [AVT] Re: Review draft-ietf-avt-avpf-ccm-07 Magnus Westerlund
- [AVT] RE: Review draft-ietf-avt-avpf-ccm-07 Even, Roni