> -----Message d'origine----- > De : Michal Kazior [mailto:michal.kazior@xxxxxxxxx] > Envoyé : mardi 24 mars 2015 07:56 > À : Cedric VONCKEN > Cc : linux-wireless > Objet : Re: ath10k: What will happens when radar is detected ? > > On 23 March 2015 at 16:16, Cedric VONCKEN <cedric.voncken@xxxxxxxxx> > wrote: > > In 802.11ac standard, it is possible to dynamically reduce the channel > > width used. > > My question is: > > If I use a channel with 80 or 40 MHz width, what will happen > > if I detect radar? > > The ath10k card/driver reduces automatically the > > channel width. > > Currently entire chandef occupied will be marked as unavailable and AP > will stop/switch to a different non-overlapping chandef via CSA. Thanks for your answer. > > I guess it should be possible to implement what you suggest, i.e. > change only chandef width when radar is narrow and located at a suitable > part of the chandef. This would require hw to be capable of detecting > radar center freq and width accurately. I'm not sure if QCA988X is > capable of that although firmware interface seems to be able to carry > this kind of information already. > > I wonder why would you want this behaviour in the first place? > Wouldn't this actually end up with having less bandwidth and lower > throughput (which is already penalized when radar detection is active)? In an industrial environment we prefer to reduce the throughput but keep the link without gap. I think it can be a parameter in AP software for example. Cédric -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
