On 30 October 2014 08:48, Ali Abedi <a2abedi@xxxxxxxxxxxx> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
