On Mon, 26 Nov 2007 22:30:05 +0100 Mattias Nissler <mattias.nissler@xxxxxx> wrote: > This changes rc80211_simple failed frame percentage estimation to use an > exponential moving average method. Failed frames percentage is sampled > over time and a smoothed average is computed. This average is examined > periodically and the rate adjusted eventually. This can be seen as a particular example of a PID controller [1]. It's actually a PI controller, with no derivative terms in it. It could be interesting to implement a regular PID controller. This is clearly a MIMO model, with the setpoints being a reasonable value of TX failures and the highest achievable rate, the process input being the bitrate and the process output being TX failures and successes; and obviously, the big issue being the implementation without floating-point. Thus, with some tuning, you could probably get a very good rate control algorithm. I just wanted to share this thought ATM, but I'll try to elaborate more if I happen to have some spare time. [1] http://en.wikipedia.org/wiki/PID_controller -- Ciao Stefano - 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
