Re: [MMUSIC] Offer/Answer PT Questions - text proposal
Paul Kyzivat <pkyzivat@alum.mit.edu> Tue, 01 March 2016 19:32 UTC
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From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Date: Tue, 01 Mar 2016 14:32:08 -0500
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Subject: Re: [MMUSIC] Offer/Answer PT Questions - text proposal
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*If* it is really the case that there is no relationship between O/A and the lifetime of RTP sessions, then we have some work to do to sort out what the relationship is between what is in the O/A and what is in the RTP session. IIUC, in the case where the is no RTP session prior an offer, the O/A must at least establish some initial PT bindings for the session-to-be. (I have a feeling that what we are discussing is quite fundamental, and I find it shocking if it hasn't been considered in the past.) Colin - your insight would be helpful here. Thanks, Paul On 3/1/16 2:16 PM, Roman Shpount wrote: > On Tue, Mar 1, 2016 at 2:06 PM, Paul Kyzivat <pkyzivat@alum.mit.edu > <mailto:pkyzivat@alum.mit.edu>> wrote: > > On 3/1/16 1:23 PM, Roman Shpount wrote: > > What really bugs me about this discussion is that it is extremely > difficult to determine when RTP session is started or stopped > based on > O/A exchanges. Because of this it is difficult to determine when > it is > safe to reuse PT for something else just by looking at O/A. > > > Well, can we assume that if the addr/port changes at one of the ends > then this is to be a new RTP session? > > I saw end points that will update the remote addr/port but will continue > using the same RTP SSRC and sequence numbers. > > Are there cases where nothing in the SDP changes but a new RTP > session is established? (Or can we require signaling in this case?) > > There are quite a few end points which will start a new RTP session > unsolicited. > > Maybe we need to start using the a=connection attribute with RTP to > indicate change of RTP session. :-) > > > This will not be backwards compatible and will break a lot of things. > > So far, there have been no relationship between O/A exchanges and RTP > sessions. Sometimes RTP sessions start without O/A exchange and > sometimes the same RTP session continues through O/A exchange. What we > need is a non-ambiguous way to decode RTP packets not the complete RTP > session life time management. This will mean we need to specify when new > RTP session MUST start (when conflict is detected). It does not require > anything more. > _____________ > Roman Shpount > > > _______________________________________________ > mmusic mailing list > mmusic@ietf.org > https://www.ietf.org/mailman/listinfo/mmusic >
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Schwarz, Albrecht (Nokia - DE)
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Gonzalo Salgueiro (gsalguei)
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… DOLLY, MARTIN C
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… DOLLY, MARTIN C
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Christer Holmberg
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Jonathan Lennox
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Drage, Keith (Nokia - GB)
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Paul Kyzivat
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Colin Perkins
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Drage, Keith (Nokia - GB)
- Re: [MMUSIC] Offer/Answer PT Questions - text pro… Roman Shpount