Re: [PATCH] Update regulatory rules for Ecuador (EC)

From: Victor Bayas <victorsbayas@gmail.com>
To: Seth Forshee <sforshee@kernel.org>
Cc: wireless-regdb@lists.infradead.org, linux-wireless@vger.kernel.org
Subject: Re: [PATCH] Update regulatory rules for Ecuador (EC)
Date: Thu, 26 Aug 2021 11:22:49 -0500	[thread overview]
Message-ID: <CAD+f07-egB+kgjbbY2mN=0KaV+HddQfxRB019o65um3QR4ceaw@mail.gmail.com> (raw)
In-Reply-To: <YSemAGfADr2WTey8@ubuntu-x1>

My apologies, I forgot to CC the mailing list in my previous reply.

El jue, 26 de ago. de 2021 a la(s) 09:32, Seth Forshee
(sforshee@kernel.org) escribió:
>
> On Tue, Aug 24, 2021 at 10:14:09PM -0500, Victor Bayas wrote:
> > Update the frequency ranges and power limits according to the current Ecuadorian norm [1],
> > corrected 5GHz maximum bandwidth since there are no legal restrictions in this subject.
> >
> > Note: 60GHz channels 1 to 3 are allowed without license for Point-to-Point links but
> > they aren't for Point-to-Multipoint links so they were omitted in this patch.
> >
> > [1] https://www.arcotel.gob.ec/wp-content/uploads/2018/04/NORMA-ESPECTRO-DE-USO-LIBRE-Y-ESPECTRO-PARA-USO-DETERMINADO-EN-BANDAS-LIBRES.pdf
> >
> > Signed-off-by: Victor Bayas <victorsbayas@gmail.com>
>
> Thanks for the patch! A few comments below.
>

Thank you for your feedback.

> > ---
> >  db.txt | 12 +++++++-----
> >  1 file changed, 7 insertions(+), 5 deletions(-)
> >
> > diff --git a/db.txt b/db.txt
> > index e7b11cf..4630854 100644
> > --- a/db.txt
> > +++ b/db.txt
> > @@ -504,12 +504,14 @@ country DZ: DFS-JP
> >       (5250.000 - 5330.000 @ 80.000), (23.00), DFS, AUTO-BW
> >       (5490.000 - 5670.000 @ 160.000), (23.00), DFS
> >
> > +# Source:
> > +# https://www.arcotel.gob.ec/wp-content/uploads/2018/04/NORMA-ESPECTRO-DE-USO-LIBRE-Y-ESPECTRO-PARA-USO-DETERMINADO-EN-BANDAS-LIBRES.pdf
> >  country EC: DFS-FCC
> > -     (2402 - 2482 @ 40), (20)
> > -     (5170 - 5250 @ 20), (17)
> > -     (5250 - 5330 @ 20), (24), DFS
> > -     (5490 - 5730 @ 20), (24), DFS
> > -     (5735 - 5835 @ 20), (30)
> > +     (2400 - 2483.5 @ 40), (1000 mW)
> > +     (5150 - 5250 @ 80), (50 mW), AUTO-BW
>
> It looks like 5150-5250 MHz also requires DFS.

Yes, I tried contacting ARCOTEL without success to get a clarification
from them because other countries don't require DFS for 5150-5250 MHz.

>
> > +     (5250 - 5350 @ 80), (250 mW), AUTO-BW, DFS
> > +     (5470 - 5725 @ 160), (250 mW), DFS
>
> 5250-5350 and 5470-5725 MHz require TPC. Since Linux does not support
> TPC the power limits need to be reduced by 3 dBm, which puts them at 125
> mW.

Thanks for the heads up, I forgot there was a TPC requirement.

>
> I also don't see any DFS requirement for 5470-5725 MHz.

Section 2.1.6 says that users of 5250 - 5350 MHz and 5470 - 5725 MHz
should apply the interference mitigation measures mitigation measures in
Recommendation ITU-R M.1652 to ensure compatible behavior with
radiodetermination systems.

ITU-R M.1652 norm section 1.1 recommends the usage of DFS for
5250 - 5350 MHz and 5470 - 5725 MHz, so I inferred the DFS
requirement for 5470 - 5725 MHz as well.

https://www.itu.int/dms_pubrec/itu-r/rec/m/R-REC-M.1652-1-201105-I!!PDF-E.pdf

Greetings,
Victor Bayas.