Re: [iccrg] Musings on the future of Internet Congestion Control

Michael,

Your paper mentions the issue of "not being able to ramp up capacity 
quickly enough". There has been quite a bit of attention to that in the 
context of satellite networks, leading for example to 
https://datatracker.ietf.org/doc/html/draft-kuhn-quic-careful-resume-01.html 
-- basically, remember network conditions from previous connections and 
use them cautiously to ramp up congestion control faster. Maybe worth 
mentioning in follow-up papers.

-- Christian Huitema

On 6/15/2022 1:02 AM, Michael Welzl wrote:
> Dear ICCRGers,
>
> We just got a paper accepted that I wanted to share:
> Michael Welzl, Peyman Teymoori, Safiqul Islam, David Hutchison, Stein Gjessing: "Future Internet Congestion Control: The Diminishing Feedback Problem", accepted for publication in IEEE Communications Magazine, 2022.
>
> The preprint is available at:
> https://arxiv.org/abs/2206.06642 <https://arxiv.org/abs/2206.06642>
> I thought that it could provoke an interesting discussion in this group.
>
> Figures 4 and 5 in this paper show that, across the world, network links do not just become "faster”: the range between the low end and the high end grows too.
> This, I think, is problematic for a global end-to-end standard - e.g., it means that we cannot simply keep scaling IW along forever (or, if we do, utilization will decline more and more).
>
> So, we ask: what is the way ahead?  Should congestion control really stay end-to-end?
>
> Cheers,
> Michael
>
>
>
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