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Date: Fri, 30 Sep 2011 14:52:58 +0200
From: Zefir Kurtisi <zefir.kurtisi@neratec.com>
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To: Adrian Chadd <adrian@freebsd.org>
CC: "Luis R. Rodriguez" <rodrigue@qca.qualcomm.com>,
	linux-wireless <linux-wireless@vger.kernel.org>,
	Boris Presman <boris.presman@ti.com>,
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	David Quan <dquan@qca.qualcomm.com>,
	Kevin Hayes <hayes@qca.qualcomm.com>,
	Arun Venkataraman <arunvenk@qca.qualcomm.com>
Subject: Re: Regulatory revamp status
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On 09/30/2011 01:21 PM, Adrian Chadd wrote:
> On 29 September 2011 20:46, Zefir Kurtisi <zefir.kurtisi@neratec.com> 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