On Sat, Mar 04, 2023 at 05:13:44PM -0600, Keshav wrote: > Hello, > > I noticed that wireless-regdb db.txt [1] has restricted India's 2.4 > GHz maximum power to only 20 dBm: > > country IN: > (2402 - 2482 @ 40), (20) > > However the Official Gazette of Government of India (PDF [3] linked in > URL [2]) mentions that upto 30 dBm is allowed in the 2.4 GHz band. > > 2.4 GHz Rules for India (IN): Pages 87 to 88 of PDF [3] > > I would like to mention that I am not an expert in this topic. I am > not sure if there's any other reason to restrict 2.4 GHz for India to > 20 dBm in the db.txt. I also couldn't find any other official > Government of India document that restricts the maximum power to 20 > dBm (due to some other reason). Please look into this and correct the > regulatory rules for India if needed. Thank you. > > Although not the topic of this email, you can also find the 5 GHz > Rules for India in the same PDF [3] (pages 94 to 97) if interested. > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/sforshee/wireless-regdb.git/tree/db.txt?id=7f7a9f7bc6011b072b5427eced1ff19261764e95#n853 > > [2] https://dot.gov.in/spectrummanagement/gazette-notifications-delicensed-band > > [3] https://dot.gov.in/sites/default/files/Gazette_Notifications.pdf Sorry for the slow response. I've been attempting to research this as time allows, but I haven't had a lot of time for it, and the information is not well organized. [1] was the most complete summary I found for spectrum use in India. In particular Annex 1 has a table of GSR numbers relevant for unlicensed spectrum, which for 2.4 GHz is GSR No. 45(E) [2] and for 5 GHz is GSR No. 1048(E) [3]. It looks like the document you linked to just bundles these and other GSRs together, so as far as I can tell the information you provided looks accurate. The database stores maximum EIRP, not transmitter output power, so I think that 36 dBm is the correct value for 2.4 GHz (GSR No. 45(E) shows an ERP of 36dBm, but based on the maximum transmitter power of 30 dBm I think this is probably meant to be the EIRP). The 5 GHz rules look mostly right, except that it looks like 5250-5350 and 5470-5725 MHz both require DFS. They also require TPC, which Linux doesn't support, but the PSD limit restricts our max EIRP to below the threshold where TPC is required. So I think these are the correct rules for India: country IN: (2400 - 2482 @ 40), (36) (5150 - 5250 @ 80), (30) (5250 - 5350 @ 80), (24), DFS (5470 - 5725 @ 160), (24), DFS (5725 - 5875 @ 80), (30) If this looks right to you, I can send the patch to update the rules. Thanks, Seth [1] https://dot.gov.in/sites/default/files/NFAP%202018.pdf [2] https://dot.gov.in/spectrummanagement/delicensing-24-24835-ghz-band-gsr-45-e-5150-5350-ghz-gsr-46-e-and-5725-5875-ghz [3] https://dot.gov.in/spectrummanagement/license-exemption-5-ghz-gsr-1048e-dated-22102018 _______________________________________________ wireless-regdb mailing list wireless-regdb@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/wireless-regdb
