On 2 May 2016 at 19:59, Ben Greear <[email protected]> wrote: > On 04/26/2016 11:37 PM, Michal Kazior wrote: >> >> On 26 April 2016 at 16:35, Ben Greear <[email protected]> wrote: >>> >>> >>> >>> On 04/25/2016 11:16 PM, Michal Kazior wrote: >>>> >>>> >>>> On 25 April 2016 at 22:31, Ben Greear <[email protected]> wrote: >>>>> >>>>> >>>>> Has anyone tried this? Looks like hostapd has the ability to set the >>>>> feature flags, but I am not sure if it is really working in ath10k? >>>> >>>> >>>> >>>> Yes, it works. You need a few vht_capabs. I have mine like this: >>>> >>>> > >>>> >>>> vht_capab=[RXLDPC][SHORT-GI-80][TX-STBC-2BY1][SU-BEAMFORMER][SU-BEAMFORMEE][MU-BEAMFORMER][RX-ANTENNA-PATTERN][TX-ANTENNA-PATTERN][BF-ANTENNA-4][MAX-MPDU-11454][RX-STBC-1][MAX-A-MPDU-LEN-EXP7] >>>> >>>> The SU-, MU- and BF- are the required part only I think. >>>> >>>> >>>>> >>>>> Do you actually need anything other than standard whip antenna to >>>>> allow this to function properly? >>>> >>>> >>>> >>>> I don't think. FWIW Make sure the antennas are reasonably set >>>> up/separated from each other. If you cram them too tight/randomly >>>> beamforming won't work efficiently. I had problem with client antennas >>>> being too close to each other and lying flat on a table (I than made a >>>> foam-stand and put them a few cm apart) so the same thing must apply >>>> to AP as well. >>>> >>>> >>>>> >>>>> What about station mode? >>>> >>>> >>>> >>>> Works as well. Both on QCA99XX and QCA9377. >>> >>> >>> >>> Thanks for the info. How did you determine that it actually worked? >> >> >> Empirically. If you get 600mbps UDP to two 1x1 clients it works :) >> >> Also, the rx bitrate on the receiving ath10k end will be kind of wierd >> (there's currently no way to decode MU ratesets on Rx because group >> ids are managed in firmware). > > > So, I configured 3 systems: 1 is AP, two are acting as stations. > > All are 9980, but the two station systems are forced to act like > 1x1. > > Single station download is about 270Mbps over-the-air. But, when I > add the second station, then total over-the-air stays at about 270Mbps. > > So, I guess mu-mimo is not actually working for me. > > My hostapd config looks like this (below). Does it look right? Do I need > something > special in wpa_supplicant config on the station side?
Nope. [...] > [TX-STBC][RX-STBC123][MAX-AMSDU-7935][DSSS_CCK-40][PSMP][LSIG-TXOP-PROT] > ht_capab=[HT20][HT40+][SHORT-GI-40][SHORT-GI-20] > vht_capab=[MAX-MPDU-11454][RXLDPC][TX-STBC-2BY1][RX-STBC-1][MAX-A-MPDU-LEN-EXP0][RX-ANTENNA-PATTERN][TX-ANTENNA-PATTERN][SU-BEAMFORMER][SU-BEAMFORMEE][MU-BEAMFORMER][SHORT-GI-80] Are you sure you want to use EXP0? There was a bug in hostapd long time ago that required that IIRC.. you should be setting EXP7 now, no? FWIW you're missing BF-ANTENNA-4. Not sure if this is really necessary. Other than that I guess you can look at debugs/traces (or add prints) to see if vdev txbf param is set properly on both ap and clients and if peer-assoc vht_caps include MU-. Michał _______________________________________________ ath10k mailing list [email protected] http://lists.infradead.org/mailman/listinfo/ath10k
