DFS radar pattern detection in different regions

Adrian Chadd adrian at freebsd.org
Sat Aug 20 19:11:57 PDT 2016

I mean, it's done in software, so you can do that if you want to. It
just won't be "right".

Why? :)


On 20 August 2016 at 19:05, Raj Joshi <rajjoshi at comp.nus.edu.sg> wrote:
> In simpler terms , I want to know if I could run ath10k on DFS
> channels in countries "outside" of FCC, ETSI and JP regulations?
> Thanks,
> Raj Joshi
> On Tue, Aug 16, 2016 at 10:23 PM, Raj Joshi <rajjoshi at comp.nus.edu.sg> wrote:
>> Hi,
>> I am aware that DFS scan and pattern detection is possible in ath10k
>> or to be precise it is implemented in the ath kernel module. From the
>> source code (dfs_pattern_detector.c), I can see that there are
>> patterns specific to ETSI, FCC and JP regulatory regions.
>> I got some conceptual questions regarding the pattern detection and regulations:
>> Q.1 For a given country, the wireless-regdb [1] specifies one of these
>> 3 regions for DFS. For example, "country AE: DFS-FCC" or "country AF:
>> DFS-ETSI". What does this mean? Does it mean that country AE follows
>> DFS rules of FCC and that country AF follows those of ETSI?
>> Q.2 If the above is the case, then can I run ath10k "correctly" as
>> well as "legally" in country AE, given that pattern detection is
>> implemented for FCC? When I say "correctly", I mean that pattern
>> detection will not have any false negatives. And when I say "legally",
>> I mean that my ath10k device would comply with the local regulations
>> of country AE, given that my device is FCC DFS compliant.
>> It is little hard to believe that all the world's radar patterns could
>> be covered by 3 regulatory standards (FCC, ETSI and JP). Also if that
>> was the case, then ath10k already does a very good job with DFS
>> channels and the new swanky 802.11ac devices such as [2] are simply
>> not worth their price!
>> I would appreciate if someone can provide a clarification around this.
>> Thanks,
>> Raj
>> [1] http://git.kernel.org/cgit/linux/kernel/git/sforshee/wireless-regdb.git/tree/db.txt
>> [2] https://www.kickstarter.com/projects/portalwifi/portal-turbocharged-wifi/description
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