On Wed, May 25, 2011 at 4:37 PM, Luis R. Rodriguez <mcgrof@xxxxxxxxx> wrote: > On Wed, May 25, 2011 at 5:19 AM, Helmut Schaa > <helmut.schaa@xxxxxxxxxxxxxx> wrote: >> On Wed, May 25, 2011 at 12:54 AM, Luis R. Rodriguez <mcgrof@xxxxxxxxx> wrote: >>> Yes, thanks this is a lot of work already done. Now we just need a >>> basic algorithm to parse this, quantify how ideal this channel is and >>> then spit out a desired optimal channel. >> >> That's what I've hacked some time ago (in form of the attached _ugly_ shell >> script that does auto channel selection with rt2x00, not sure if it works >> correct with other drivers as the survey dump differs somehow between >> rt2x00, ath5k and ath9k, and it only does channel 1-11): >> >> - Iterate over all channels and stay on each channel for some time > > Nice, yeah I was thinking of using the offchannel operation if we want > to spend more time there for inspection and if associated. For first > iteration it should be possible to just move around. In fact for AP > purposes I suppose one will want to just start AP mode ASAP and then > later do offchannel operations to do the inspection on the ideal > channel. Otherwise we sit there idle until we complete the Automatic > Channel Selection thingy. Correct, especially if we also consider 5Ghz channels. Offchannel operations would be nice but how can we ensure AP mode while being offchannel? >> - Store busy time stats for each channel >> - Choose the channel with the lowest busy time (and on 2.4Ghz also >> check the busy times on adjacent channels) > > So I was reviewing this -- if we are TX'ing or RX'ing it seems to me > we should skip that time from the busy time, otherwise the "busy" time > includes time we induced on TX'ing or RX'ing ourselves. So I was > thinking of using the: > > (active time - rx time - tx time) / busy time Looks good ;) just one problem from a rt2x00 POV: We can't report rx/tx busy time separately, we can only advice the hw to include or exclude rx/tx time from the busy time statistics. Helmut -- 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
