Hi Igor, On Tue, 2018-12-11 at 02:30 +0000, Igor Mitsyanko wrote: > Hello, > > according to ETSI > https://www.etsi.org/deliver/etsi_en/301800_301899/301893/02.01.01_60/en_301893v020101p.pdf > section 4.2.3.2.2, table 2 > Note 3 states: > >Slave devices without a Radar Interference Detection function shall > >comply with the limits for the frequency range 5 250 MHz to 5 350 MHz. > > And Tx power limits are defined as following: > 5150 to 5350: 20 dbm > 5470 to 5725: 27 dbm > Which means that if STA device can not do radar detection, it must use > 20dbm Tx powers on all channels (can not use 27 dbm limit). > > > Looking at regdb > https://git.kernel.org/pub/scm/linux/kernel/git/sforshee/wireless-regdb.git/tree/db.txt, > power limit for frequency range 5470 to 5725 is defined at 27 dbm. I guess somebody misinterpreted the spec, or some countries are less strict? > Question is: does wireless core assumes that each device can do radar > detection in slave modes (eg acting as a STA) and it is enabled by > default? I couldn't find any logic in kernel which would limit 27 dbm > power to 20 for STA devices. No, we shouldn't assume that it can do radar detection by itself ... I guess we should have some code? Or just fix the regdb? johannes _______________________________________________ wireless-regdb mailing list wireless-regdb@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/wireless-regdb
