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Re: DFS CAC time

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Hi Zefir,

On Fri, Dec 19, 2014 at 12:27 PM, Zefir Kurtisi
<zefir.kurtisi@xxxxxxxxxxx> 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).

Hmm, ok :)

Would it make sense to mark these somehow in the wireless-regdb in a
special way?

Thanks,
Helmut
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