[ath9k-devel] [PATCH/RFC] ath9k PER/ratecontrol

[Andreas Hofmann <andreas.hofmann@corscience.de>]

Hi Mohammed,

On 29.04.2011 09:00, Mohammed Shafi wrote:
> hi,
>            I don't know much about rate control, but this probe
> interval 50 should have been fixed by the team which had formulated
> this algorithm and I hope it might definitely have some meaning.
> *Its true that increasing the probe interval will definitely improve
> Video traffic(based on some inputs from an Engineer) but it looks 2s
> is too high for the probe interval.
> *when the channel conditions are poor (or) when the range is high, its
> important that the rate control gets down into some lower rate as
> quick as possible  but when we have 2seconds won't it affect that?

I did not do extensive testing with different values for the interval,
only 1 second, 2 seconds and 5 seconds. From these values, 2 secs
yielded the best results. From my understanding, the interval only
controls probing rates higher than the current rate, not falling back to
lower ratesn.In that case, a higher interval would actually be better,
since unnecessary packet drops due to too frequent use of MCSs not
suited for the channel would be reduced.

Kind regards,
 Andreas