[RFC 0/4] hostapd: introduce Automatic Channel Selection (ACS)

Yogesh Ashok Powar yogeshp at marvell.com
Fri Jul 26 04:45:31 EDT 2013


On Fri, Jul 26, 2013 at 01:00:23AM -0700, Johannes Berg wrote:
> On Fri, 2013-07-26 at 07:33 +0200, Michal Kazior wrote:
> 
> > Yes, that crossed my mind too. However there's currently no way of
> > telling a driver how long it should stay on each channel during scan.
> > We also wouldn't be totally piggy-backing the overlapping BSS scan
> > since ACS can do a couple of scan-cycles (unless we decide not to, and
> > simply do a very long scan on each channel once).
> > 
> > But yeah, using scan seems certainly simpler and would make it easier
> > to add BSS-based ACS in the future.
> 
> Fair enough, maybe we should just leave it as is and create new
> mechanisms in the future? I just think that we might not support
> remain-on-channel as the mechanism for doing measurements (in our
> driver) as easily.

Hi Michal,

Here is our last findings from ACS feature in hostapd
http://article.gmane.org/gmane.linux.kernel.wireless.general/109945

We can give users some option to choose from different ACS
algorithms. Eg., Simple scan based algorithm or Advanced algo which
requires off-channel rx/tx support from the driver.

Thanks
Yogesh

> 
> johannes
> 
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