[R-C] RTCWEB Congestion Control Standardization

[Magnus Westerlund]

Hi,

I want to lift an important non-technical topic for discussion. Namely,
what is needed in the specifications and how to get that to happen.


It is clear that RTCWEB can't be the home to specify any new congestion
control algorithms or procedures. That needs to be defined elsewhere.

Looking at what is available from a specification point of view, I think
the only that is fully specified for RTP is TFRC in DCCP.

The technical discussion appears to be desiring something else. Thus I
think we need to have the discussion of how to get that written up in a
specification eventually. What is the plan here? From my perspective we
will need something that is acceptable to get the RTCWEB's RTP usage
specification through IESG. Especially as we have identified clear
security threats to no having congestion control in the browser part
preventing significant over uses.

So what are our alternative here?

1) Pick TFRC for now while developing something better? Possibly ensure
that the RTP mapping gets published in a reasonable time frame.

2) Try to write clear requirements on the implementation, but no
specification and hopes that goes through?

3) Develop something and delay the publication of any part that needs
this until it is done?

4) ?

Regarding 3), I don't see how that is going to complete in less than 2
more likely 3 years. Spin up a TSV WG, develop a solution. Simulate and
discuss corner cases for a while before getting good enough out.

So what are your views on this issue?

Cheers

Magnus Westerlund

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Multimedia Technologies, Ericsson Research EAB/TVM
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