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Re: [Wish] IETF LC Review of draft-ietf-wish-whip-09

Bernard Aboba <bernard.aboba@gmail.com> Mon, 06 November 2023 14:23 UTC

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From: Bernard Aboba <bernard.aboba@gmail.com>
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Date: Mon, 06 Nov 2023 06:23:07 -0800
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To: Sergio Garcia Murillo <sergio.garcia.murillo@gmail.com>
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Subject: Re: [Wish] IETF LC Review of draft-ietf-wish-whip-09
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You can mention the issue, refer to CC experiments (like Yin Yang’s video on YouTube referring to libwebrtc cc mods for ingestion), and leave it there.

One point is that twcc/gcc is unique in supporting simulcast, which requires multiplicative increase as well as decrease.  

On Nov 6, 2023, at 02:26, Sergio Garcia Murillo <sergio.garcia.murillo@gmail.com> wrote:


Hi Bernard, sorry for the late review

I agree with your feedback regarding the importance of congestion control to ensure the best quality of ingest session (probably more important for UGC than for professional grade studios though).

I am not sure what we could do in order to improve it, as as you suggest it is mostly an implementation issue and not a spec one. The consensus until now was not to provide implementation guidelines in the spec itself and only clarify potential misuses/confusions that could happen during implementation. Moreover, the group is not charter to work on the CC algos themselves, so we would have to point to work either on RMCAT or RTCWEB (or even MoQ).

To make things more complicated, the defacto implementation (twcc and gcc) is not specified at all, so I am concerned that we could even provide any actual guidance within the spec.

Any idea about how we could progress this? Maybe it is something we can discuss during tomorrow's meeting?

Best regards
Sergio


On Wed, Jul 26, 2023 at 3:33 AM Bernard Aboba <bernard.aboba@gmail.com> wrote:
is here: 

Datatracker has been unstable today so no emails appear to have been sent. 
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