Re: [nwcrg] What I SHOULD have said about https://datatracker.ietf.org/doc/html/draft-kuhn-coding-congestion-transport

[Emmanuel Lochin <[e-mail]>]

Le 21/11/2019 à 10:08, Spencer Dawkins at IETF a écrit :
> During Nicholas's presentation this afternoon, I pointed out that it 
> might be good to consider whether "repair equals loss" was the right 
> model for sender congestion control responses because we we had 
> considered ECN as equal to loss for many years, but (FINALLY) 
> redefined the ECT(1) bit to allow other responses. It might be useful 
> to point the discussion of this draft in the same direction - assume 
> the use of scalable congestion control and ECT(1) signaling.
>
> I was talking to Gorry Fairhurst afterwards, and Gorry told me what I 
> SHOULD have said, was that the sender should perform whatever its 
> response to congestion would be - if it's an old-style sender, treat 
> recovery as loss, but if it supports scalable congestion control (L4S 
> is one example), it doesn't have to treat recovery as loss - it just 
> needs to do something appropriate.
>

Fully agree, we just signal the recovery, the treatment depends on the 
CC policy.

EL

> Again, I hope that's useful, and I appreciate this work a lot, because 
> people do need it.
>
> Thanks,
>
> Spencer
>
> p.s. cc: Gorry, in case I got that wrong.
>
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Emmanuel LOCHIN
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