Re: wireless-regdb: update CA rules for 5600 - 5650 mHz

[Zefir Kurtisi <zefir.kurtisi@neratec.com>]

On 07/02/2015 07:44 AM, Wei Zhong wrote:
> commit 2fef4cad8a1bd9cbbf178e59a1b3ca672b057095
> Author: Wei Zhong <wzhong@google.com>
> Date:   Wed Jul 1 22:39:09 2015 -0700
> 
>     wireless-regdb: update CA rules for 5600 - 5650 mHz
> 
>     Related regulation:
>     http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf10971.html#s6.2.3
> 
>     Frequency Bands 5470-5600 MHz and 5650-5725 MHz
>     Until further notice, devices subject to this section [i.e. Wifi device
>     supporting 5 GHz bands] shall not be capable of transmitting in the band
>     5600-5650 MHz. This restriction is for the protection of Environment
>     Canada’s weather radars operating in this band.
> 
> diff --git a/db.txt b/db.txt
> index 809cd3c..da0cfad 100644
> --- a/db.txt
> +++ b/db.txt
> @@ -216,7 +216,8 @@ country CA: DFS-FCC
>         (2402 - 2472 @ 40), (30)
>         (5170 - 5250 @ 80), (17), AUTO-BW
>         (5250 - 5330 @ 80), (24), DFS, AUTO-BW
> -       (5490 - 5730 @ 160), (24), DFS
> +       (5490 - 5600 @ 80), (24), DFS
> +       (5650 - 5730 @ 40), (24), DFS
>         (5735 - 5835 @ 80), (30)
> 
>  # Source:
> --

I believe this could also be interpreted differently. If the change is only about
removing the weather radar band (5600-5650), the change should be

 -       (5490 - 5730 @ 160), (24), DFS
 +       (5490 - 5570 @ 80), (24), DFS
 +       (5570 - 5590 @ 20), (24), DFS
 +       (5650 - 5730 @ 80), (24), DFS

The second rule explicitly states that channel 116 remains available for HT20. If
this level of strict correctness is not needed, rule 1 and 2 combined would be

 -       (5490 - 5730 @ 160), (24), DFS
 +       (5490 - 5590 @ 80), (24), DFS
 +       (5650 - 5730 @ 80), (24), DFS


Cheers
Zefir