What is worse is that I agree entirely.<div><br><div>Short time fairness is important and more important is a fairness criterion that enables expedited forwarding for RTC.<span></span></div><div> And for RTC </div><div>what you say is key.</div><div><br></div><div>However, EDCF is not going to help when you have many stations and low PHY rates should be disabled </div><div>to get something that approaches to what you have in mind.<br><br>On Wednesday, 11 May 2016, Dave Taht <<a href="mailto:dave.taht@gmail.com">dave.taht@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">My own foci are going to be around trying to rip every source of<br>
potential latency out of the current system: be it deferred<br>
interrupts, bad rate control information, overlong txops, excessive<br>
retries, insufficient packet loss, busting the block ack window, and<br>
quashing stations grabbing too much airtime...<br>
<br>
and then adding back in "bandwidth" from there. We have enough<br>
bandwidth in wifi nowadays, just now narrow enough time slices to feed<br>
many stations sanely.<br>
<br>
a somewhat subtle distinction is that aiming for airtime fairness<br>
independently of the behaviors of real traffic is not a goal (for me).<br>
A system handing out 8 stations 8ms each of airtime is "fair", but<br>
handing out 1ms each - or just enough, for example, for my<br>
videoconferencing flow to handle each frame with a single txop - or<br>
getting a new station started faster on some web traffic - is better.<br>
<br>
Certainly there is a ton of low hanging fruit to excise, and achieving<br>
something closer to but we ignore multicast, channel scans, and other<br>
oddities to our peril.<br>
<br>
I don't, for example, think that aiming for airtime fairness over 1sec<br>
intervals is good, 20-50ms would be way more desirable. And so on.<br>
Getting a good rate control estimate by the second txop used by a<br>
previously idle station would be good. And so on.<br>
<br>
...<br>
<br>
this message brought to you from the association for more coffee in the morning.<br>
</blockquote></div></div>