[Make-wifi-fast] Thoughts on tackling airtime fairness

Toke Høiland-Jørgensen toke at toke.dk
Wed May 11 12:40:00 EDT 2016

>> My own foci are going to be around trying to rip every source of
>> potential latency out of the current system: be it deferred
>> interrupts, bad rate control information, overlong txops, excessive
>> retries, insufficient packet loss, busting the block ack window, and
>> quashing stations grabbing too much airtime...
> and oh, yea, queuing delay. :)

What's that? ;)

>> and then adding back in "bandwidth" from there. We have enough
>> bandwidth in wifi nowadays, just now narrow enough time slices to feed
>> many stations sanely.
> Bandwidth = rate/interval. Humans have a terrible tendency to using
> big intervals, like seconds... I'd like to focus on calculating
> bandwidth as rate/(minimal achievable txop under contention) rather
> than maximal.

Yes, well, it's a tradeoff to a certain extent. But sure, latency is
key; hence the idea to use an FQ-CoDel-based scheduler rather than
simply do round-robin. And I figure getting the aggregate size down to a
manageable size is another angle of attack.


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