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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