Re: [rtcweb] Quick comments on draft-roach-rtcweb-glareless-add-00
Paul Kyzivat <pkyzivat@alum.mit.edu> Fri, 10 May 2013 21:20 UTC
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Date: Fri, 10 May 2013 17:20:02 -0400
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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To: Stefan Håkansson LK <stefan.lk.hakansson@ericsson.com>
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>, "mmusic@ietf.org" <mmusic@ietf.org>
Subject: Re: [rtcweb] Quick comments on draft-roach-rtcweb-glareless-add-00
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On 5/10/13 2:37 AM, Stefan Håkansson LK wrote: ... > But I can easily think of other situations that would lead to glare for > Plan A. > > Just as an example, think about a conference scenario with a centralized > node. Now, one of the participants wants to mute her/his audio, and as a > result the audio m-line would go from sendrecv to recvonly. At roughly > the same time the server wants to disable the high res video and enable > the low res video (because this user will be moved, based e.g. on the > recent audio activity, from being displayed in the main video window to > be in a thumbnail on the screen of the other participants in the > conference), so it wants to manipulate the direction attribute of other > m-lines. > > So there would be two offers sent at roughly the same time, which means > we would have glare. What do you mean by "roughly"? How long does it take to do an O/A exchange that doesn't require human input? Presumably less than a second, maybe considerably less. (Or will it be more with RTCWEB and web servers in the path?) What is the probability that the other side, for independent reasons, decides to make a change within that interval? (And it isn't really the whole interval - it is only the first part of it.) There may indeed be realistic cases for glare, but they will probably be because both changes are keyed to a common event. Thanks, Paul
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Paul Kyzivat
- [rtcweb] Quick comments on draft-roach-rtcweb-gla… Ted Hardie
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Adam Roach
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Ted Hardie
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Adam Roach
- [rtcweb] Glare in draft-roach-rtcweb-glareless-ad… Dale R. Worley
- Re: [rtcweb] Glare in draft-roach-rtcweb-glareles… Adam Roach
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Adam Roach
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Paul Kyzivat
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Adam Roach
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Paul Kyzivat
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Stefan Håkansson LK
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Cullen Jennings
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Dale R. Worley
- [rtcweb] Reducing glare Dale R. Worley
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Paul Kyzivat
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Paul Kyzivat
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Stefan Håkansson LK
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Paul Kyzivat
- Re: [rtcweb] [MMUSIC] Quick comments on draft-roa… Bernard Aboba
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Stefan Håkansson LK
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Emil Ivov
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Stefan Håkansson LK
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Emil Ivov
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Bernard Aboba
- Re: [rtcweb] Quick comments on draft-roach-rtcweb… Stefan Håkansson LK
- Re: [rtcweb] [MMUSIC] Quick comments on draft-roa… Emil Ivov
- Re: [rtcweb] [MMUSIC] Quick comments on draft-roa… Harald Alvestrand
- Re: [rtcweb] [MMUSIC] Quick comments on draft-roa… Stefan Håkansson LK
- Re: [rtcweb] Glare in draft-roach-rtcweb-glareles… Christer Holmberg
- Re: [rtcweb] Glare in draft-roach-rtcweb-glareles… Iñaki Baz Castillo
- Re: [rtcweb] Reducing glare Iñaki Baz Castillo