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([2804:d51:4975:7202:7e03:331b:6be0:eea6]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-237d874fe39sm153753155ad.251.2025.06.26.03.13.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 26 Jun 2025 03:13:19 -0700 (PDT) Message-ID: Date: Thu, 26 Jun 2025 07:13:17 -0300 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: wireless-regdb: Update regulatory rules for Brazil (BR) on 6GHz Content-Language: en-US To: wens@kernel.org Cc: linux-wireless@vger.kernel.org, wireless-regdb@lists.infradead.org References: <8bc290d6-5687-495d-b5d5-a8ca94cf2f7a@gmail.com> <46ab2a6b-82ff-4330-819e-99a67280409a@gmail.com> From: Marcos Alano In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 26/06/2025 07:05, Chen-Yu Tsai wrote: > On Thu, Jun 26, 2025 at 5:56 PM Marcos Alano wrote: >> >> >> >> On 26/06/2025 06:23, Chen-Yu Tsai wrote: >>> Hi, >>> >>> On Thu, Jun 26, 2025 at 4:37 PM Marcos Alano wrote: >>>> >>>> On 26/06/2025 05:15, Chen-Yu Tsai wrote: >>>>> On Mon, Jun 2, 2025 at 9:23 AM Marcos Alano 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 work because of this outdated rule based on an outdated normative.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. > Where can I check if the regulation requires NO-IR? I couldn't find any mention to this. > 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 >> -- Marcos Alano