On 30 October 2014 08:48, Ali Abedi <a2ab...@uwaterloo.ca> wrote: > Hi Adrian, > > > We observed that this can happen for any rate for some SNR values. > If the SNR is strong enough for the given MCS this won't happen. > But when the SNR approaches the transition region when > error rate starts to increase, this problem will be observed. > > So this can happen even for MCS0->MCS4 when the client is far from the AP > and specially when it's moving.
Right. That's the missing useful information here. :) Yes, I'd expect this happens whilst the client is moving. The training stuff is all done on the beginning of the packet and channel conditions aren't adjusted during packet reception - only upon the next received packet. (FYI - I've seen a similar pattern, but when i stand between the AP / STA at > MCS13 and start waving my hands around. Just that slight change in channel conditions == the above failure.) So thanks for reminding us that we should take A-MPDU length into account in our rate control code. :) -adrian _______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
