Am Dienstag, 24. Mai 2011 schrieb Pavel Roskin: > On 05/24/2011 12:44 PM, Cristian Ionescu-Idbohrn wrote: > > On Tue, 24 May 2011, Pavel Roskin wrote: > >> > >> Speaking of channels, I think only some channels should be eligible for > >> automatic selection (that would be 1, 6 and 11 in the 2.4 GHz range). > > > > May I ask what the rationale behind that may be? > > That's a safe distance between channels. That's why channels 1, 6 and > 11 are used more often than others. > > Our algorithm make select, say, channel 3. That may be the most quiet > channel at the moment. We may use absolutely the best algorithm to > determine that. However, it is likely that APs operating on channels 1 > and 6 would eventually appear in vicinity, and out AP would interfere > with both of them instead of just one of them. > > Using a car analogy, consider channels 1, 6 and 11 like lanes on a > highway. Using other channels would be like driving between lanes. It > may seem safe, but only in absence of other traffic. > > It's possible that the list of autoselectable channels could be country > specific. I would hate to add complexity to CRDA. Hopefully we could > device a simple algorithm to find the autoselectable channels based on > the CRDA data. Why not use a channel list as input to the algorithm (in whatever form). Hence, it would work for all channels (if the user wishes to do so) but it can be limited to a list of preferred channels (1,6,11). 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
