[Make-wifi-fast] Thoughts on tackling airtime fairness

[Michal Kazior]

On 11 May 2016 at 20:13, Dave Taht <dave.taht at gmail.com> wrote:
[...]
> Adding in mu-mimo to the picture makes my head hurt. My understanding
> of how mu-mimo is supposed to work is you have to have accumulated
> 2-3ms worth of packets for the number of stations you are going to
> schedule before it's worthwhile at all.
>
> The stations are going to typically be limited to 1 antenna (most
> laptops have 2), I think. So a 4 antenna system *could* send to 4
> stations if all have traffic pending...

4 antenna system can beamform 3 independent spatial streams that can
be used for MU-MIMO. Depending on connected station capabilities with
4 antenna AP you could do 1+1 (some stations may not be able to
participate in 4-antenna system), 1+1+1 or 1+2 groupings.


Michał