Initial automatic channel selection implementation
helmut.schaa at googlemail.com
Wed May 25 00:24:32 EDT 2011
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).
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