Which is better way for scanning AP channel

G.W. Haywood ged at jubileegroup.co.uk
Thu Apr 5 08:17:38 EDT 2007


Hi there,

On Thu, 5 Apr 2007 ahuguet wrote:

> I'm not sure that functionality you're asking for exists.
>
> One thing you can do, though, is ensure you select a channel that, at
> least, no other AP is using.
>
> You can use the iwlist *interface* scan command in order to have a list of
> all AP at reach, as well as the channel they're using. That way you could
> know what channel to select, so your AP would be the only one using it,
> and theoretically having a level of interference lower than the others.
> You wouldn't be safe from external interference sources. That would need
> sensing each channel the way you initially wanted that, as I said, I'm not
> sure is feasible.

+1 to all that.  I'd suggest that you'll need something rather complex
which monitors throughput, errors, dropped connections and the weather
(I'm not kidding about the weather - here's what happened to my signal
strength in snow: http://www.jubileegroup.co.uk/radio/signal_strength.gif
) on an ongoing basis and makes a very difficult decision based on a
large number of sometimes rapidly changing factors.  You might have
completely unreliable results if the Number 69 from Tooting is just
passing by at the time of a scan, and this might result in a worse
connection that if you just did nothing, and left the devices to sort
it all out for themselves...

--

73,
Ged.



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