Re: 802.11ac devices that use Minstrel_HT

2018-02-13 Thread Ali Abedi
Thank you, this is extremely helpful for us. Do you know any device that supports more than 2 spatial streams? (Is mt76 capable of supporting more spacial streams at the moment?) Best, Ali On 2/13/2018 8:26 AM, Lorenzo Bianconi wrote: On Dienstag, 13. Februar 2018 07:56:29 CET Ali Abedi

802.11ac devices that use Minstrel_HT

2018-02-12 Thread Ali Abedi
Hello, It seems that Minstrel_ht rate adaptation algorithm supports 802.11ac VHT rates. Can you refer me to some 802.11ac devices that use this rate adaptation algorithm? I need to modify the rate adaptation algorithm however all 802.11ac devices that I know have moved this functionality to (c

Re: strange MPDU loss pattern

2014-10-30 Thread Ali Abedi
On 30 October 2014 08:48, Ali Abedi 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 b

Re: strange MPDU loss pattern

2014-10-30 Thread Ali Abedi
me pattern on say, MCS0->MCS4 over a 4ms long aggregate frame? -adrian On 25 October 2014 13:35, Ali Abedi wrote: Thank you for sharing the story. Even if I consider interference as a possibility, still I can't justify the higher chance of frame loss in the second half of the aggregat

Re: strange MPDU loss pattern

2014-10-25 Thread Ali Abedi
hanks, Ali On 25/10/2014 11:19 AM, Adrian Chadd wrote: On 24 October 2014 13:42, Ali Abedi wrote: We don't use a rate adaptation at this moment (i.e., fixed rate) and the setup is stationary. So we expect to see relatively stable channel conditions. Even if the channel conditions change

Re: strange MPDU loss pattern

2014-10-24 Thread Ali Abedi
ion of a packet, the tail end is going to end up having less SNR and may end up getting more errors. -adrian On 24 October 2014 09:04, Ali Abedi wrote: Hello, We study the effects of 802.11n frame aggregation on throughput. We noticed a strange pattern in the MPDU loss within an aggregated

strange MPDU loss pattern

2014-10-24 Thread Ali Abedi
Hello, We study the effects of 802.11n frame aggregation on throughput. We noticed a strange pattern in the MPDU loss within an aggregated frame. It seems that the second half of the MPDUs (those with higher sequence numbers) in an aggregated frame are more likely to be lost. Is this a known f

Block ACK without frame aggregation

2014-10-22 Thread Ali Abedi
Hello, I am interested to know if we can send multiple packets (non-aggregated, single packets) and then ask for a block ACK? I like to know if this functionality has been implemented in ath9k or if it is possible to achieve this with slight code modifications. What I need: Frame-SIFS-Frame-S