Re: [PATCHv6 0/6] Add DFS master ability

Simon Wunderlich
2013-01-23T12:52:37Z

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On Mon, Jan 21, 2013 at 11:46:20AM +0100, Zefir Kurtisi wrote:
> On 01/18/2013 11:08 PM, Johannes Berg wrote:
> > Hi,
> >
> >> As stated before: "available until ..." time is not neccessary as far
> >> as I know. Also the channel must stay available when AP stops operation,
> >> I'll change that.
> >
> > Yeah, I checked the documents myself now ... strange, but hey. Radars
> > are fixed installations and mostly active continually, so I guess they
> > figured it was no big deal.
> >
> We were also unsure if this makes sense and contacted regulatory for
> clarification. Indeed, with the current document a scenario where "I switched to a
> DFS channel and skipped CAC because I passed one half a year ago" is fully
> compliant. Practically, when you set up a new AP and do once a CAC for each DFS
> channel during installation time, you don't need to do a CAC ever again (as long
> as you do not see radars).
>
Thanks for clarification. :)

> Why then bother with CAC at all, one might think. In fact, exploiting given
> requirements to such extent is mandatory to make operation on DFS channels usable
> (which btw. is not the scope of the patches discussed here).
>

I would actually like to make operation on DFS channels usable by using the implementation
from these patches. :) Do you imply that we couldn't practically use it? Any suggestions
what can be improved?

Cheers,
Simon

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