Re: [splices] Using Two Separate Devices to Start a Conversation proposal
"Worley, Dale R (Dale)" <dworley@avaya.com> Thu, 30 June 2011 22:06 UTC
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From: "Worley, Dale R (Dale)" <dworley@avaya.com>
To: Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>, Alan Johnston <alan.b.johnston@gmail.com>
Date: Thu, 30 Jun 2011 18:06:38 -0400
Thread-Topic: [splices] Using Two Separate Devices to Start a Conversation proposal
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Cc: "splices@ietf.org" <splices@ietf.org>
Subject: Re: [splices] Using Two Separate Devices to Start a Conversation proposal
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>> As Dale mentioned, this also depends on the other end doing the "right >> thing" with this case. It is a leap of faith to assume it will realize it >> should accept both streams and use one for input and the other for output. >> >> ISTM its at least as likely that it would accept the first stream, reject >> the second, and then have only a one-way "conversation". > > OK, I understand the problem right now. The problem is that this is a > special kind of "Join" operation. It is kind of a join, but not > quite. > > The operation we are after is perhaps similar to 3.3.8 Far-Fork in RFC 5850: > > I suspect instead of Join, we need a new primitive, lets call it > Splice or Merge which requests the UAS to add the media in the INVITE > into the dialog that is referenced. OK, now I see the problem with using Join. UA A1 sends an INVITE (requesting only audio) to UA B (which supports both audio and video). UA A2 sends an INVITE (requesting only video) to UA B (which supports both audio and video), with Join to the first dialog. Then we should expect that UA B will send its audio to A1 and its video to A2, within the semantics of Join. The difficulty is that UA B still sees the situation as two different dialogs. E.g., if A1 sends a REFER/Refer-To: C to B, the A1-B dialog will be replaced by the C-B dialog, but the A2-B dialog will be undisturbed. Which is not the behavior we want if we are trying to logically bond A1 and A2 to act as a single UA. Using Join would have been convenient as it is already defined, and theoretically, UAs already support it. Dale
- [splices] Using Two Separate Devices to Start a C… Shekh-Yusef, Rifaat (Rifaat)
- Re: [splices] Using Two Separate Devices to Start… Peter Musgrave
- Re: [splices] Using Two Separate Devices to Start… Worley, Dale R (Dale)
- Re: [splices] Using Two Separate Devices to Start… Worley, Dale R (Dale)
- Re: [splices] Using Two Separate Devices to Start… Alan Johnston
- Re: [splices] Using Two Separate Devices to Start… Paul Kyzivat
- Re: [splices] Using Two Separate Devices to Start… Paul Kyzivat
- Re: [splices] Using Two Separate Devices to Start… Worley, Dale R (Dale)
- Re: [splices] Using Two Separate Devices to Start… Worley, Dale R (Dale)
- Re: [splices] Using Two Separate Devices to Start… Alan Johnston
- Re: [splices] Using Two Separate Devices to Start… Worley, Dale R (Dale)
- Re: [splices] Using Two Separate Devices to Start… Alan Johnston
- Re: [splices] Using Two Separate Devices to Start… Paul Kyzivat
- Re: [splices] Using Two Separate Devices to Start… Peter Musgrave
- Re: [splices] Using Two Separate Devices to Start… Paul Kyzivat
- Re: [splices] Using Two Separate Devices to Start… Shekh-Yusef, Rifaat (Rifaat)
- Re: [splices] Using Two Separate Devices to Start… Peter Musgrave
- Re: [splices] Using Two Separate Devices to Start… Gonzalo Camarillo
- Re: [splices] Using Two Separate Devices to Start… Paul Kyzivat
- Re: [splices] Using Two Separate Devices to Start… Gonzalo Camarillo
- Re: [splices] Using Two Separate Devices to Start… Worley, Dale R (Dale)
- Re: [splices] Using Two Separate Devices to Start… Paul Kyzivat
- Re: [splices] Using Two Separate Devices to Start… Worley, Dale R (Dale)