[PATCH] wireless-regdb: update regulatory rules for Bangladesh (BD)

[Chen-Yu Tsai]

On Mon, Aug 24, 2026 at 4:16 PM Ibrahim Hossain Abir <xbowpc at gmail.com> wrote:
>
> Hi ChenYu,
>
> Understood. I have reached out directly to the Spectrum Division of
> BTRC (sohel at btrc.gov.bd) requesting technical clarification on
> explicit EIRP limits and standards for 5925–6425 MHz.

If possible, could you ask for status updates on the 5 GHz bands
as well? You intended to add them in your patch.

> I will update this thread as soon as I receive an official response from them.
>
> Thanks,
> Ibrahim Hossain Abir
>
>
> On Mon, Aug 24, 2026 at 1:39 PM Chen-Yu Tsai <wens at kernel.org> wrote:
> >
> > On Mon, Aug 24, 2026 at 3:23 PM Ibrahim Hossain Abir <xbowpc at gmail.com> wrote:
> > >
> > > Hi ChenYu,
> > >
> > > Thank you for the review.
> > >
> > > Regarding the reference:
> > > The official BTRC circular (dated Sept 15, 2024) specifically
> > > authorizes the 5925–6425 MHz frequency range for Wi-Fi/WLAN/IoT shared
> > > usage in Bangladesh. However, this notice does not define explicit
> > > EIRP power limits, TPC, or DFS requirements.
> > >
> > > In the initial patch, standard conservative limits (such as 23 dBm for
> > > 6 GHz LPI) were derived from standard Wi-Fi 6E/7 spectrum norms.
> > >
> > > Could you advise on how wireless-regdb prefers to handle cases where
> > > the regulatory body approves the band without listing explicit EIRP
> > > limits in their notice? Would setting a conservative default (like 20
> > > dBm / 100 mW EIRP) for 5925–6425 MHz be acceptable for Patch v2?
> >
> > As previously mentioned we cannot accept random limits without justification.
> > The regulatory body needs to specify limits, or outright state they defer
> > to some other standard.
> >
> > Please help reach out to the regulatory body for clarification. They should
> > provide the information, otherwise folks doing the certification have nothing
> > to base it off of.
> >
> >
> > Thanks
> > ChenYu
> >
> > > Thanks,
> > > Ibrahim Hossain Abir
> > >
> > >
> > > On Mon, Aug 24, 2026 at 10:38 AM Chen-Yu Tsai <wens at kernel.org> wrote:
> > > >
> > > > On Mon, Aug 24, 2026 at 4:26 AM Ibrahim Hossain Abir <xbowpc at gmail.com> wrote:
> > > > >
> > > > > wireless-regdb: update regulatory rules for Bangladesh (BD)
> > > > >
> > > > > Update regulatory rules for Bangladesh (BD) based on the official BTRC
> > > > > (Bangladesh Telecommunication Regulatory Commission) directive dated
> > > > > September 15, 2024.
> > > > >
> > > > > Enables U-NII-1/2A, U-NII-2C (DFS), U-NII-3/4, and lower 6 GHz (5925-6425 MHz).
> > > > >
> > > > > Official BTRC Notice:
> > > > > https://btrc.gov.bd/pages/notices/6922ee00dbfbab28ce0c438d
> > > >
> > > > This only says that the lower 6 GHz range is allowed. It does not say
> > > > what the power limits are, or if there are any other restrictions.
> > > >
> > > > > User Impact Reference:
> > > > > https://community.intel.com/t5/Wireless/6-GHz-Wi-Fi-6E-Not-Detected-on-Intel-AX211-in-Bangladesh/m-p/1740885
> > > > >
> > > > > Signed-off-by: Ibrahim Hossain Abir <xbowpc at gmail.com>
> > > > > ---
> > > > >  db.txt | 8 +++++---
> > > > >  1 file changed, 5 insertions(+), 3 deletions(-)
> > > > >
> > > > > diff --git a/db.txt b/db.txt
> > > > > index 0000000..1111111 100644
> > > > > --- a/db.txt
> > > > > +++ b/db.txt
> > > > > @@ -223,5 +223,7 @@ country BD: DFS-JP
> > > > >   (2402 - 2482 @ 40), (20)
> > > > > - (5735 - 5835 @ 80), (30)
> > > > > + (5150 - 5350 @ 80), (20), NO-OUTDOOR, AUTO-BW
> > > > > + (5470 - 5725 @ 160), (20), DFS, AUTO-BW
> > > > > + (5725 - 5850 @ 80), (30)
> > > > > + (5925 - 6425 @ 320), (23), NO-OUTDOOR
> > > >
> > > > A reference with the band and power limits, as well as any other
> > > > restrictions like DFS or TPC (andif TPC is required, what is the
> > > > limit if TPC is not implemented) needs to be provided. We cannot
> > > > put random numbers into the database without justification.
> > > >
> > > >
> > > > Thanks
> > > > ChenYu