[wireless-regdb] EU Regulation on CAC time

Johannes Berg johannes at sipsolutions.net
Wed Mar 21 01:26:01 PDT 2018

On Tue, 2018-03-20 at 23:48 +0100, Nicco Kunzmann (mail.ru) wrote:
> Dear list subscribers,
> I was reading through the  db.txt file.
> I did not see the CAC time for the country I live in, Germany.
> According to [1], DFS frequencies are described.
> However, I also read EN301893 [2] which is referenced by [1].
> EN301893, page 104, Table D.1 describes the CAC times and handles the
> range 5600MHz to 5650MHz specially with extended CAC times.
> Now, I read the db.txt file [3], section DE.
> There, I can not find the 5600MHz to 5650MHz range specified. Nor am I
> able to locate information about the DFS-ETSI region.
> I guess, the information can be inherited from somewhere.
> Could you help me understand where the information for EN301893/ the
> dfs_region "DFS-ETSI" is described?
> I checked "wireless-regdb"[4] and "crda"[5] and could not find it.

The CAC times are currently hard-coded in the kernel. The new
regulatory db framework (loading it as a firmware file) has the ability
to provision it through there, but the wireless-regdb db.txt, parser &
generator doesn't support it yet.

CRDA is more or less dead - still used, but will not get any future


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