"Jean-Pierre TOSONI" <jp.tosoni@xxxxxxxxx> writes: > Hi list, > > I just stumbled on this patch that IMHO was rejected for a bad reason: > > [PATCH v3 4/4] cfg80211: DFS use 10 minutes CAC when weather channels > At http://www.spinics.net/lists/linux-wireless/msg115296.html > > The reason given is the "unachievable" requirement in the ETSI norm of > 99.99% detection success. It was even considered disabling the weather > channels. > > *But the norm (ETSI EN 301 893 V1.7.1) does not say this.* It states > that 99.99% is the target performance: > > - during conformance tests only, (5.3.8.1.1 paragraph 5) > - specifically *not* a requirement with specific real life radars, > (5.3.8.1.1 paragraph 5) > - on a limited series of 20 tests, (5.3.8.2.1.2 item g) > - with a pulse power at +10dB above other pulse detection tests, > (5.3.8.2.1.2 item f) > - with some patterns excluded from the test. (5.3.8.2.1.2 item g) > > Hence it is very possible that existing products can achieve the > conformance test target. > > That being said, would it be possible to reexamine that dropped patch > and apply it? Don't we support this by getting the CAC time in the regulatory database? commit 31559f35c5724976fd975e5d7e90cdb693b8dd27 Author: Janusz Dziedzic <janusz.dziedzic@xxxxxxxxx> Date: Fri Feb 21 19:46:13 2014 +0100 cfg80211: DFS get CAC time from regulatory database Send Channel Availability Check time as a parameter of start_radar_detection() callback. Get CAC time from regulatory database. Signed-off-by: Janusz Dziedzic <janusz.dziedzic@xxxxxxxxx> Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> -- Kalle Valo -- 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
