Return-path: Received: from mail-ig0-f178.google.com ([209.85.213.178]:37443 "EHLO mail-ig0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751267AbaLTK1x (ORCPT ); Sat, 20 Dec 2014 05:27:53 -0500 Received: by mail-ig0-f178.google.com with SMTP id hl2so1916938igb.11 for ; Sat, 20 Dec 2014 02:27:52 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: <54940B8C.5070801@neratec.com> Date: Sat, 20 Dec 2014 18:27:52 +0800 Message-ID: (sfid-20141220_112756_956852_E05F626D) Subject: Re: DFS CAC time From: YanBo To: Janusz Dziedzic Cc: Zefir Kurtisi , Helmut Schaa , linux-wireless Content-Type: text/plain; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: One correct based on the patch, the 5600 should be change with 5590, or else the channel 128 will be disabled in my testing. + (5490 - 5590 @ 80), (27), DFS, AUTO-BW + (5590 - 5650 @ 40), (27), (600000), DFS, AUTO-BW + (5650 - 5710 @ 40), (27), DFS, AUTO-BW BR /Yanbo On Fri, Dec 19, 2014 at 8:28 PM, Janusz Dziedzic wrote: > On 19 December 2014 at 12:27, Zefir Kurtisi wrote: >> On 12/18/2014 05:21 PM, Helmut Schaa wrote: >>> Hi, >>> >>> [...] >>> >>> So, every channel has a CAC time of 60 seconds. >>> >>> Checking version 1.7.2 of the ETSI regulation indicates that we might >>> need some modifications to cfg80211: >>> >>> From [1] page 79: >>> >>> "NOTE 1: For channels whose nominal bandwidth falls completely or >>> partly within the >>> band 5 600 MHz to 5 650 MHz, the Channel Availability Check Time shall be >>> 10 minutes. >>> NOTE 2: For channels whose nominal bandwidth falls completely or >>> partly within the >>> band 5 600 MHz to 5 650 MHz, the Off-Channel CAC Time shall be within the >>> range 1 hour to 24 hours." >>> >>> So, for these channels we should select a longer initial CAC time. >>> >>> Is anyone aware of this issue? >>> >>> Thanks, >>> Helmut >>> >>> >>> [1] http://www.etsi.org/deliver/etsi_en/301800_301899/301893/01.07.02_20/en_301893v010702a.pdf >>> -- >> >> Hello Helmut, >> >> just forget about those aka 'weather channels' that require a pracitcally >> impossible to achieve radar detection probability rate (99.99% during CAC, see >> table D.5). >> >> They should simply be disabled, either at mac layer, or at least in ath/regd.c. >> > > You can use internal regdb and set this correctly in db.txt, eg > > + (5490 - 5600 @ 80), (27), DFS, AUTO-BW > + (5600 - 5650 @ 40), (27), (600000), DFS, AUTO-BW > + (5650 - 5710 @ 40), (27), DFS, AUTO-BW > > There are also patches for crda/wireless-regdb but not merged, so use > internal regdb. > > BR > Janusz > -- > To unsubscribe from this list: send the line "unsubscribe linux-wireless" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html