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Re: [MMUSIC] Congestion control

Bernard Aboba <bernard_aboba@hotmail.com> Tue, 11 June 2013 10:05 UTC

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From: Bernard Aboba <bernard_aboba@hotmail.com>
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Date: Tue, 11 Jun 2013 03:05:28 -0700
To: Cullen Jennings <fluffy@iii.ca>
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Subject: Re: [MMUSIC] Congestion control
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VoIP typically doesn't use layered coding or simulcast. Also, earlier there was a discussion of using signaling vs. Magnus' codec operation point to control resolution, which in the case of spatial scaling would involve addition or removal of layers - and as I recall, signaling won. 

On Jun 10, 2013, at 11:10 PM, "Cullen Jennings" <fluffy@iii.ca> wrote:

> 
> On Jun 11, 2013, at 4:16 AM, Bernard Aboba <bernard_aboba@hotmail.com> wrote:
> 
>> Cullen said: 
>> 
>> 
>> " No O/A is request to stop sending RTP packets on a given stream. "
>> 
>> [BA]  So you're saying that you don't expect a=sendrecv/recvonly/sendonly to be used in Plan A to control streams described by individual m lines?    I had assumed that the O/A behavior described in RFC 3264 Sections 5.1 and 6.1 would apply in Plan A.  
> 
> Bernard - do you really think the "a=sendrecv/recvonly/sendonly " is how we do congestion control for VoIP? I don't think that is the approach that WeRTC will take to congestion control. Of course "a=sendrecv/recvonly/sendonly  are part of SDP but they are not how anyone other than you has proposed to do congestion control. I think you would agree they would be a pretty non optimal way to do congestion control. 
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