On Wed, Aug 17, 2022 at 08:31:56PM -0300, Cesar Eduardo Barros wrote: > The wireless-regdb rules for Brazil in wireless-regdb have no comment > indicating where they came from, and haven't been updated in a long time. > There have been some changes to the legislation since then, including the > addition of the 6 GHz and 60 GHz ranges. > > The relevant legislation can be found in the following three URLs, mostly > the last one: > > https://www.gov.br/anatel/pt-br/regulado/radiofrequencia/radiacao-restrita > > https://informacoes.anatel.gov.br/legislacao/resolucoes/2017/936-resolucao-680 > > https://informacoes.anatel.gov.br/legislacao/atos-de-certificacao-de-produtos/2017/1139-ato-14448 Thanks for the information, and sorry for the slow response. I have limited time to review changes, and this one took a while. I provide more detailed responses below, but in general I think your suggested changes look correct. > In the last one, the relevant articles are: > > * Article 10 is the classic wireless ranges (2.4 GHz, and 5 GHz channels 149 > to 165), and the 900 MHz ranges > * Article 11 is the extended 5 GHz and 6 GHz ranges > * Article 22 is the vehicular (V2X) ranges > * Article 23 is the 60 GHz ranges > > > Here follows my interpretation of these rules from a wireless-regdb point of > view, with the relevant article number in parenthesis: > > Other than the article 22 range (5850-5925 MHz), these rules don't mention a > max channel width, so VHT160 or even larger would be allowed in all ranges > except 5850-5925 MHz. > > For ranges 902-907.5 MHz, 915-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz > (article 10.1), the maximum power output in the transmitter is 1 W (30 dBm, > article 10.3.2), and the maximum antenna gain is 6 dBi (article 10.5). Seems right. > For range 5150-5250 MHz (article 11.1), the maximum EIRP would be 4 W (36 > dBm, article 11.1.1), but since the smallest channel size we use in this > range is 20 MHz, and the maximum EIRP spectral density is 50 mW/MHz (17 > dBm/MHz, article 11.1.2), the maximum EIRP is 1 W (30 dBm); this range is > INDOOR-ONLY (article 11.1.3), and requires either TPC (article 11.5) or a > reduction of 3 dB (article 11.5.1). This also seems right. > For range 5250-5350 MHz (article 11.1), the maximum EIRP is 1 W (30 dBm, > article 11.1.1); this range is INDOOR-ONLY (article 11.1.3), requires either > TPC (article 11.5) or a reduction of 3 dB (article 11.5.1), and requires DFS > (article 11.6). Correct. > For range 5470-5725 MHz (article 11.3), the maximum power output in the > transmitter is 250 mW (24 dBm, article 11.3.1), the maximum EIRP is 1 W (30 > dBm, article 11.3.2), requires either TPC (article 11.5) or a reduction of 3 > dB (article 11.5.1), and requires DFS (article 11.6). Correct. > For range 5925-7125 MHz (article 11.7), there are different rules for APs, > clients, and very low power devices. For APs (article 11.7.1), the maximum > EIRP is 30 dBm (article 11.7.1.1), and it's INDOOR-ONLY (article 11.7.1.3); > for clients of an indoor AP (article 11.7.2), the maximum EIRP is 24 dBm > (article 11.7.2.1), and it's INDOOR-ONLY (article 11.7.2.3); for very low > power devices (article 11.7.3), the maximum EIRP is 17 dBm (article > 11.7.3.1). Right, so in this case it's possible to use either 24 dBm, NO-OUTDOOR or 17 dBm and allow outdoor use. We've used the higher, indoor-only rule in the past. But as you note in your replies there is a PSD limit for clients which limits power to 12 dBm (since PSD limits are not currently supported) and it needs NO-IR. > For vehicular range 5850-5925 MHz (article 22.1), the base channel width is > 10 MHz but they can be aggregated (article 22.1.1), the maximum EIRP is 23 > dBm (200 mW, article 22.2), and it requires TPC (article 22.3). Looking at the documents you provided and [1], the only allowed use of this range is for vehicle communication systems and not for WLAN. Unless I missed something, I think this range should be left out of the database. [1] https://informacoes.anatel.gov.br/legislacao/atos-de-certificacao-de-produtos/2020/1467-ato-4776 > For range 57-71 GHz (article 23.1), the maximum EIRP is 40 dBm (article > 23.1.1) with maximum peak 43 dBm (article 23.1.2). Correct. > I'm unsure as how to correctly represent the rules with a maximum antenna > gain in wireless-regdb. My best guess as to how these rules would be > represented in wireless-regdb, based on the US rules which have some > similar-looking ranges and power limits, would be (ignoring for now the 900 > MHz and vehicular ranges, since I'm unsure about their correct channel > widths): > > # Source: > # https://www.gov.br/anatel/pt-br/regulado/radiofrequencia/radiacao-restrita > # https://informacoes.anatel.gov.br/legislacao/resolucoes/2017/936-resolucao-680 > # https://informacoes.anatel.gov.br/legislacao/atos-de-certificacao-de-produtos/2017/1139-ato-14448 > country BR: DFS-FCC > #(902 - 907.5 @ ???), (30) > #(915 - 928 @ ???), (30) For these ranges I think you should use the same bandwidth as other rules in the database, i.e. 2 and 16 MHz. > (2400 - 2483.5 @ 40), (30) > # The next three ranges have been reduced by 3dB, could be increased back > to 30dBm if TPC is implemented. > (5150 - 5250 @ 80), (27), NO-OUTDOOR, AUTO-BW > (5250 - 5350 @ 80), (27), NO-OUTDOOR, DFS, AUTO-BW > # This range ends at 5725 MHz, but channel 144 extends to 5730 MHz. > # Since 5725 ~ 5730 MHz belongs to the next range which has looser > # requirements, we can extend the range by 5 MHz to make the kernel > # happy and be able to use channel 144. > (5470 - 5730 @ 160), (27), DFS > (5730 - 5850 @ 80), (30) > # This range requires TPC. > #(5850 - 5925 @ ???), (20) This rule should be omitted. > # AP 30dBm, client 24dBm > (5925 - 7125 @ 320), (24), NO-OUTDOOR This range needs the adjustments from your later emails. > # EIRP=40dBm (43dBm peak) > (57000 - 71000 @ 2160), (40) Otherwise I think these changes look good. If you can send a patch with the changes I would appreciate it, otherwise let me know and I can send a patch. Thanks, Seth > On a quick look, the result looks sane and makes sense to me: 1 W (30 dBm) > everywhere, reduced by 3 dB on the DFS channels since TPC isn't implemented; > for 6 GHz the client is reduced by 6 dB, which is also the case at least on > the US rules according to the comment there; and 60 GHz seems to follow > everyone else in using 40 dBm. > > -- > Cesar Eduardo Barros > cesarb@xxxxxxxxxxxxx > > _______________________________________________ > wireless-regdb mailing list > wireless-regdb@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/wireless-regdb _______________________________________________ wireless-regdb mailing list wireless-regdb@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/wireless-regdb
