Re: [nwcrg] I-D Action: draft-irtf-nwcrg-coding-and-congestion-05.txt

[Emmanuel Lochin <[e-mail]>]

Hi all,

Le 18/02/2021 à 14:02, Michael Welzl a écrit :
>>
>> This is where the coding “gains” are the most important. Also some 
>> temporary “perceived” congestion (when there is in fact still 
>> capacity) can have longer term effect if the CC is very conservative 
>> (and yes someone will tell me it’s not fully the case anymore). All 
>> of this to say that the draft should be clearer on the type of 
>> research that is needed again when the performance is impacted 2 
>> conflicting control loops.
>>
> I don’t fully subscribe to this “2 conflicting control loops” view. It 
> depends on the scenario, I guess. E.g., if congestion control operates 
> on unreliable data transfer, and FEC operates on top, repairing 
> losses, then these are quite separate functions, doing separate 
> things, not conflicting.
>
> Anyway, it’s fair that you ask for more clarity in the draft, but 
> that’s why I’m trying to really understand your concrete questions or 
> concerns.

Agree with Michael, there is no control loop for NC. At least, for the 
NC discussed so far at NWCRG.
I mean the generation of encoded packets does not depend on feedback 
while their sending lays on a transport protocol.

EL


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Emmanuel LOCHIN
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