wireless-regdb: Update regulatory rules for Brazil (BR) on 6GHz

[Chen-Yu Tsai]

On Thu, Jun 26, 2025 at 5:56 PM Marcos Alano <marcoshalano at gmail.com> wrote:
>
>
>
> On 26/06/2025 06:23, Chen-Yu Tsai wrote:
> > Hi,
> >
> > On Thu, Jun 26, 2025 at 4:37 PM Marcos Alano <marcoshalano at gmail.com> wrote:
> >>
> >> On 26/06/2025 05:15, Chen-Yu Tsai wrote:
> >>> On Mon, Jun 2, 2025 at 9:23 AM Marcos Alano <marcoshalano at gmail.com> wrote:
> >>>>
> >>>> Hi,
> >>>>
> >>>> The rules for Brazil were based on this normative
> >>>> https://informacoes.anatel.gov.br/legislacao/resolucoes/2017/936-resolucao-680,
> >>>> as mentioned in the comments of the entry.
> >>>>
> >>>> This January came out a newer normative
> >>>> https://informacoes.anatel.gov.br/legislacao/resolucoes/2025/2001-resolucao-772,
> >>>>
> >>>> It allows 6GHz frequencies, so the line:
> >>>> (5925 - 7125 @ 320), (12), NO-OUTDOOR, NO-IR
> >>>> Should change for, at least:
> >>>> (5925 - 7125 @ 320), (12), NO-OUTDOOR
> >>>> The removal of NO-IR is important, since routers Wi-Fi 6E and 7 don't
> >>>> work because of this outdated rule based on an outdated normative.
> >>>
> >>> Those are very large documents. Could you help point out which sections
> >>> or comments apply to your argument?
> >>
> >> https://informacoes.anatel.gov.br/legislacao/atos-de-requisitos-tecnicos-de-gestao-do-espectro/2024/1920-ato-915:
> >> in the items IX.4 and IX.5 mentions the 6GHz frequency.
> >
> > This only covers point-to-point usage. You would need to modify the rules
> > and add the PTP flag. Likely not what you actually want.
> >
> >> https://informacoes.anatel.gov.br/legislacao/resolucoes/2025/2001-resolucao-772:
> >> You can search for "5925-6700" to check how the allocation is done.
> >> It mentions satellites, so that's why I set indoors, but maybe you
> >> understand that is not necessary.
> >
> > This only gives the band allocation, not the requirements for each use.
> > Also, satellite communication is a different use category. We should look
> > for WiFi or RLAN, or perhaps "comunicação multimídia".
> >
> > The requirements I were able to find are:
> >
> > https://informacoes.anatel.gov.br/legislacao/atos-de-certificacao-de-produtos/2021/1510-ato-1306
> >
> > ChenYu
>
> I created a v3 patch that updates the comments with the new normative
> you found, removes the NO-IR so a AP can work correctly, and changed the
> maximum power from 12 to 27, since for APs it seems to mention 30dBm,
> but I considered TPC like the other frequencies.

You failed to consider the power spectral density requirement. As I
mentioned in a previous reply, the requirement for clients is -1 dBm/MHz,
which at the smallest channel width, translates to a power limit of around
12 dBm. The original value is correct.

The database in its current form simply does not have the capability to
model things like PSD or AP vs client device specificity.

If the regulations require NO-IR for clients, then we cannot remove it
just so that APs can work. See [1] for the same discussion for US 6 GHz.

Sorry.

ChenYu

[1] https://lore.kernel.org/wireless-regdb/14ab2a58e7603047354a17b2c980c143992a6782.camel@sipsolutions.net/

> >
> >> Marcos.
> >>
> >>
> >>>
> >>> Thanks
> >>> ChenYu
> >>>
> >>>> I'm no lawyer, so please if you see something different, like more
> >>>> granular control in the allowed frequencies, please let us know.
> >>>>
> >>>> Thanks,
> >>>> --
> >>>> Marcos Alano
> >>>>
> >>>>
> >>
> >> --
> >> Marcos Alano
> >>
>
> --
> Marcos Alano
>