[R-C] proposing a WG on RTP congestion control

[Randell Jesup]

On 1/2/2012 1:56 PM, Wesley Eddy wrote:
> Hello all, following up on our discussion in Taipei, I have proposed
> a working group in the TSV area to work on RTP congestion control.
> This is scheduled to be discussed by the IESG on 1/5 in "internal
> review".
>
> The draft charter is at:
> http://www.ietf.org/iesg/evaluation/rmcat-charter.txt
>
> I would welcome participants in this list to comment on this,
> particularly if/when it moves to "external review", as I would
> expect the folks currently on this list to be some of the main
> participants in the proposed WG.  I had previously had this
> reviewed by the TSV Directorate, and got fairly good responses
> and strong interest expressed from many of the directorate in
> participating as well.
>
> Happy New Year!
>

Thanks Wesley.

First a nit:

"Other algorithms developed in light of experience with TFRC are felt to 
be motivated."  Perhaps instead: "Experience with TFRC has motivated 
demand for alternative algorithms."

While I very much do not want to do anything to delay progress on this, 
I should note that most aspects of such congestion control mechanisms 
would not be specific to RTP, though some implementation details might 
be.  We should attempt to define these algorithms such that they'd be 
applicable to any flow with similar characteristics and requirements 
(certainly other media flows), while providing specifics of how they 
apply to RTP flows.

Some aspects that are developed in this process might be useful in other 
similar domains as well, such as congestion control of multiple TCP 
flows between a pair of hosts.  I would not explicitly include TCP in 
this effort at this point to avoid feature creep, but we may want to 
have a dependent/follow-on effort for TCP.

I should note that for WebRTC/RTCWeb, we hope to be able to share a 
congestion domain with the data channels, currently expected to be 
handled via SCTP, though the details of how this will occur have not 
been decided.


-- 
Randell Jesup
randell-ietf at jesup.org