On 09/30/2011 01:21 PM, Adrian Chadd wrote: > On 29 September 2011 20:46, Zefir Kurtisi <zefir.kurtisi@xxxxxxxxxxx> wrote: > >> Really? Where would be 'there' countrycode-wise? >> >> That would definitely break today's CRDA capabilities :-\ > > I -think- one or both of ETSI/FCC have different CAC/NOL requirements > for the channels which overlap the weather radars. > At least when someone took FreeBSD to get DFS certified a while ago, > the weather radar ranges were checked against a 30 minute CAC. :) > > I think it's worth defining specific DFS parameters for each frequency > range. That's what I'll be doing for FreeBSD when I revamp its > net80211 regulatory database code. > > > Adrian I was assuming that weather radars will not be supported at all but the related channels be just disabled. It is practically impossible to assure a 99.99% detection probability (as required for ETSI 1.5.1), or? E.g. to detect ETSI radar pattern 1 (10 pulses), you basically need to treat any single detected pulse as radar event. Doable, but not very useful ;) Zefir -- 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
