Re: [question] Rate control algorithm for mesh

[Felix Fietkau <nbd@openwrt.org>]

On 2015-11-16 17:02, ferran wrote:
> Hello everybody,
> 
> I would like to know if there is a transmit rate control algorithm out
> there that takes into account the destination MAC address. My setting is
> like this:
> 
> [node0]·  ·  ·  ·  ·[node1]············[node2]
> 
> Where the spaced pattern means a poor connection and the densely dotted
> pattern means a good connection.
> 
> The problem here is that node1 oscillates between fast rates and slow
> rates, as when transmitting to node0 it must reduce the rate, and when
> transmitting to node2 it increases the rate since it must take profit of
> the channel. I am therefore getting many re-tx between n1 and n0, and
> n1-->n2 isn't as fast as it could.
> 
> Currently I am using the PID-based RC, but I'm afraid that this problem
> isn't adressed at Minstrel neither.
> Am I wrong?
Rate control instances are always per sta (so per 802.11 destination).
The problem you are describing either doesn't exist, or is something
different from what you're describing.
I would recommend running a test with latest mac80211 and minstrel(_ht),
it should perform much better than PID.

- Felix