[R-C] Request for agenda time in Paris to discuss RTP congestion control proposals
Michael Welzl
michawe at ifi.uio.no
Thu Mar 1 09:18:01 CET 2012
Hi!
Fine by us, and certainly a welcome topic in ICCRG. We can give you a 1
hour slot within our meeting.
Cheers,
Michael
On 2/29/12 1:19 PM, Harald Alvestrand wrote:
> Hello,
>
> our transport AD, Wesley Eddy, suggested I should contact you about
> the issue of getting discussion time at the Paris IETF for the problem
> of congestion control for RTP-carried real-time media.
>
> We (a small group of people working on the
> rtp-congestion at alvestrand.no mailing list) have come up with a few
> drafts, mainly based on work done at Global IP Sound and Google:
>
> - draft-alvestrand-rtcweb-congetsion-01
> - draft-alvestrand-rmcat-remb-00
>
> These drafts suggest that one implement a delay-based,
> recipient-measured estimation algorithm for bandwidth estimation over
> RTP flows, and define a feedback message (analogous to TMMBR) for the
> recipient telling the sender how much data to send at any time.
>
> There has also been discussion on the rtcweb mailing list about the
> desirable properties of such congestion control, including how it
> should interact with congestion control in SCTP, which is suggested
> for a data channel transport in the RTCWEB effort.
>
> In an informal lunch meeting in Taipei, we discussed having a
> three-pronged approach:
>
> - Defining a set of best practices for what one should really not do
> with RTP flows (such as saying "when packet loss exceeds some
> percentage, reduce send rate significantly"); this seems like
> appropriate work for AVTCORE
>
> - Define a set of feedback messages that can be used to implement
> algorithms like the one mentioned above, or others, without
> standardizing the algorithm itself
>
> - Creating a working group for publishing the ideas and pushing a long
> term effort for standardizing a congestion control algorithm. A draft
> charter is here: http://www.ietf.org/iesg/evaluation/rmcat-charter.txt
>
> Due to bad planning, we did not get a BOF request in for the Paris
> meeting, but would really like to have a place to have this discussion
> in that timeframe; also, the ICCRG should have quite a few people
> whose input we would definitely want into this discussion.
>
> Can you consider whether or not you can offer us some time on the
> ICCRG agenda for this?
>
> Harald Alvestrand
>
>
>
More information about the Rtp-congestion
mailing list