On Thu, 2020-03-26 at 17:45 +0000, Duncan McDonald wrote: > Martin, > > Interesting. I knew there were issues for 802.11ax in the ISM band > outside of the ones currently used for wifi, but it seems the issues > extend to the current 5GHz band as well. To be clear, I have no idea about this specific device or case. But 802.11h is an example of behavior required for legal/regulatory reasons. https://www.prowesswireless.com/post/2016/05/28/dfs-80211h https://www.cisco.com/c/en/us/support/docs/wireless-mobility/80211/213882-radar-detection-in-dynamic-frequency-sel.html Dan > Duncan > > -----Original Message----- > From: Martin Bourreau > Sent: Thursday, March 26, 2020 10:39 AM > To: Dan Williams <dcbw@xxxxxxxxxx>; Geoffroy Letourneur < > g.letourneur@xxxxxxxxxxx>; Johannes Berg <johannes@xxxxxxxxxxxxxxxx>; > Matthias May <matthias.may@xxxxxxxxxxx>; > linux-wireless@xxxxxxxxxxxxxxx; linuxwifi@xxxxxxxxx > Cc: Gilles Mazars <g.mazars@xxxxxxxxxxx>; Kitty (Xia) Lou < > kitty.lou@xxxxxxxxxxx>; Harris Warren <harris.w@xxxxxxxxxxx>; Raymond > Chan <raymond.chan@xxxxxxxxxxx>; Duncan McDonald < > d.mcdonald@xxxxxxxxxxx>; Seshu (Leela Seshu Reddy) Cheedepudi < > seshu.reddy@xxxxxxxxxxx> > Subject: Re: Geoffroy LETOURNEUR: Samsung AX200 system integration on > Nvidia Nano. > > Adding people for awareness of the conversation. > > Le 26/03/2020 15:32, « Dan Williams » <dcbw@xxxxxxxxxx> a écrit : > > On Thu, 2020-03-26 at 09:27 +0000, Geoffroy Letourneur wrote: > > Hello Johannes, > > > > What you mean by regulatory restrictions? > > Hardware restriction ? > > Software restriction ? > > Law restriction ? > > There are legal restrictions on spectrum use, especially in the > 5Ghz > range. Which means additional effort must be put into both > hardware and > software to satisfy those restrictions. And perhaps that effort > was not > considered cost effective for the AX200. > > Dan > > > Best regards Geo > > > > -- > > Geoffroy LETOURNEUR > > Embedded Software Engineer, > > SSIC, Paris > > > > Email: g.letourneur@xxxxxxxxxxx > > Tel: +33 6 45 14 24 32 > > > > > > > > > > Le 26/03/2020 09:24, « Johannes Berg » < > johannes@xxxxxxxxxxxxxxxx> a > > écrit : > > > > On Thu, 2020-03-26 at 08:19 +0000, Geoffroy Letourneur > wrote: > > > Hello Matthias, > > > > > > The AX200 module seems to support AP mode it works with > 2.4GHz > > Wifi > > > 802.11n mode, I tested it. But maybe it could not support > this > > mode in > > > 802.11ax. > > > > 2.4 GHz should be OK - 5 GHz is generally limited on those > > devices due > > to regulatory restrictions. > > > > johannes > > > > > > > > >
