Re: WiF Transmit Power Control (TPC) Regulatory Requirements?

You can find a wording in most such regulations that if TPC is not
supported, the maximal TX power must be reduced by 3 dBmW. Hence in
all such cases, the entries in db.txt contain 3 less than the maximum.

If, on the other hand, you know of a country that specifies that
devices lacking TPC may not use the band at all, all such band entries
must be omitted (commented out along with a URL).

On Thu, Jan 4, 2024 at 6:59 AM Chen-Yu Tsai <[email protected]> wrote:
>
> Hi folks,
>
> I wanted to clarify the current state of things.
>
> As far as I know the kernel doesn't have facilities to support TPC or
> transmit power control, nor does the wireless-regdb database. And so
> in the database we would either omit rules that require TPC, or include
> alternative rules (as specified by local regulations) not requiring TPC.
> Am I right?
>
> This came up recently with regulatory changes for Singapore and Armenia.
>
> For Singapore [1], the 5.250 – 5.350 GHz range has provisions that allow
> usage without TPC at a lower power, but the 5.470 – 5.725 GHz does not.
>
> For Armenia [2], the updated text (translated by Google Translate) as I
> read it requires TPC for all 5 GHz channels.
>
>
> Thanks
> ChenYu
>
> [1] https://www.imda.gov.sg/-/media/imda/files/regulation-licensing-and-consultations/ict-standards/telecommunication-standards/radio-comms/imdatssrd.pdf
> [2] https://www.arlis.am/DocumentView.aspx?DocID=181829
>