Re: [rtcweb] Draft proposal for updating Multiparty topologies in draft-ietf-rtcweb-rtp-usage
Magnus Westerlund <magnus.westerlund@ericsson.com> Fri, 02 May 2014 08:39 UTC
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Date: Fri, 02 May 2014 10:39:42 +0200
From: Magnus Westerlund <magnus.westerlund@ericsson.com>
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To: "Cullen Jennings (fluffy)" <fluffy@cisco.com>
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Subject: Re: [rtcweb] Draft proposal for updating Multiparty topologies in draft-ietf-rtcweb-rtp-usage
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On 2014-04-30 23:56, Cullen Jennings (fluffy) wrote: > > On Apr 15, 2014, at 9:14 AM, Magnus Westerlund > <magnus.westerlund@ericsson.com> wrote: > >> This limitation means that some of the RTP middlebox-based >> topologies are not suitable for use in the WebRTC environment. >> Specifically: >> >> o Video switching MCUs (Topo-Video-switch-MCU) SHOULD NOT be >> used, since they make the use of RTCP for congestion control and >> quality of service reports problematic (see Section 3.8 of >> [I-D.ietf-avtcore-rtp-topologies-update]). > > I think this is deserving of some WG discussion as people may not be > up to speed of what this is allowing or not allowing. My > understanding was several companies at the last WebRTC Expo > conference were demonstrating system that used this type of MCU. > > If SRTP were more flexible and there was a way to a mixer work > without giving it the keys to the decrypt the media, I think people > would be keener on mixers but right it seems like the pro / cons > invovle a trade off between significant security functionally loss > and possible loss of some RTCP data which many systems totally > ignore. Anyway, not taking any opinion other than this seems like a > significant enough change to have some discussion on it. > WG, The change is in the document currently in WG last call. So please review the whole context, and please do read the topologies document so that you have a real understanding of what a topology means. The topology names can be misinterpreted if one only looks at the high level, not the details of the RTP/RTCP behaviour the topology discusses. Cheers Magnus Westerlund ---------------------------------------------------------------------- Services, Media and Network features, Ericsson Research EAB/TXM ---------------------------------------------------------------------- Ericsson AB | Phone +46 10 7148287 Färögatan 6 | Mobile +46 73 0949079 SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com ----------------------------------------------------------------------
- [rtcweb] Draft proposal for updating Multiparty t… Magnus Westerlund
- Re: [rtcweb] Draft proposal for updating Multipar… Christian Groves
- Re: [rtcweb] Draft proposal for updating Multipar… Harald Alvestrand
- Re: [rtcweb] Draft proposal for updating Multipar… Magnus Westerlund
- Re: [rtcweb] Draft proposal for updating Multipar… Magnus Westerlund
- Re: [rtcweb] Draft proposal for updating Multipar… Harald Alvestrand
- Re: [rtcweb] Draft proposal for updating Multipar… Roni Even
- Re: [rtcweb] Draft proposal for updating Multipar… Roni Even
- Re: [rtcweb] Draft proposal for updating Multipar… Magnus Westerlund
- Re: [rtcweb] Draft proposal for updating Multipar… Magnus Westerlund
- Re: [rtcweb] Draft proposal for updating Multipar… Harald Alvestrand
- Re: [rtcweb] Draft proposal for updating Multipar… Magnus Westerlund
- Re: [rtcweb] Draft proposal for updating Multipar… Roni Even
- Re: [rtcweb] Draft proposal for updating Multipar… Cullen Jennings (fluffy)
- Re: [rtcweb] Draft proposal for updating Multipar… Magnus Westerlund
- Re: [rtcweb] Draft proposal for updating Multipar… Harald Alvestrand
- Re: [rtcweb] Draft proposal for updating Multipar… Cullen Jennings (fluffy)
- Re: [rtcweb] Draft proposal for updating Multipar… Harald Alvestrand
- Re: [rtcweb] Draft proposal for updating Multipar… Bernard Aboba