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From: Zefir Kurtisi <zefir.kurtisi@neratec.com>
To: Wei Zhong <wzhong@google.com>, seth.forshee@canonical.com
Cc: wireless-regdb@lists.infradead.org, linux-wireless@vger.kernel.org
Subject: Re: wireless-regdb: update CA rules for 5600 - 5650 mHz
Date: Fri, 03 Jul 2015 13:08:11 +0200	[thread overview]
Message-ID: <55966D1B.1040603@neratec.com> (raw)
In-Reply-To: <CAHr=Vq=hJr6WUQgFXftMSG2zYgwtCXgoTaXBzRfM8-kQa2-K2w@mail.gmail.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

WARNING: multiple messages have this Message-ID (diff)
From: Zefir Kurtisi <zefir.kurtisi@neratec.com>
To: Wei Zhong <wzhong@google.com>, seth.forshee@canonical.com
Cc: linux-wireless@vger.kernel.org, wireless-regdb@lists.infradead.org
Subject: Re: [wireless-regdb] wireless-regdb: update CA rules for 5600 - 5650 mHz
Date: Fri, 03 Jul 2015 13:08:11 +0200	[thread overview]
Message-ID: <55966D1B.1040603@neratec.com> (raw)
In-Reply-To: <CAHr=Vq=hJr6WUQgFXftMSG2zYgwtCXgoTaXBzRfM8-kQa2-K2w@mail.gmail.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

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  parent reply	other threads:[~2015-07-03 11:08 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-02  5:44 wireless-regdb: update CA rules for 5600 - 5650 mHz Wei Zhong
2015-07-02  5:44 ` [wireless-regdb] " Wei Zhong
2015-07-02 13:48 ` Seth Forshee
2015-07-02 13:48   ` [wireless-regdb] " Seth Forshee
2015-07-02 14:21   ` Wei Zhong
2015-07-02 14:21     ` [wireless-regdb] " Wei Zhong
2015-07-02 14:31     ` Seth Forshee
2015-07-02 14:31       ` [wireless-regdb] " Seth Forshee
2015-07-03 11:08 ` Zefir Kurtisi [this message]
2015-07-03 11:08   ` Zefir Kurtisi
2015-07-03 14:20   ` Wei Zhong
2015-07-03 14:20     ` [wireless-regdb] " Wei Zhong
2015-07-03 15:01     ` Zefir Kurtisi
2015-07-03 15:01       ` [wireless-regdb] " Zefir Kurtisi
2015-07-06 13:27       ` Seth Forshee
2015-07-06 13:27         ` [wireless-regdb] " Seth Forshee
2015-07-06 14:40         ` Zefir Kurtisi
2015-07-06 14:40           ` [wireless-regdb] " Zefir Kurtisi
2015-07-06 17:13           ` Wei Zhong
2015-07-06 17:13             ` [wireless-regdb] " Wei Zhong
2015-07-07 20:11           ` Seth Forshee
2015-07-07 20:11             ` [wireless-regdb] " Seth Forshee
2015-07-08 10:19             ` Zefir Kurtisi
2015-07-08 10:19               ` [wireless-regdb] " Zefir Kurtisi
2015-07-09 14:04               ` Seth Forshee
2015-07-09 14:04                 ` [wireless-regdb] " Seth Forshee

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