Re: S1G and 6GHz channels in Estonia (and EU)

[Chen-Yu Tsai <wens@kernel.org>]

(Resend to Kalle's correct email address)

On Mon, Jun 3, 2024 at 2:36 PM Chen-Yu Tsai <wens@kernel.org> wrote:
>
> (Adding linux-wireless ML, Kalle and Johannes)
>
> On Mon, Jun 3, 2024 at 1:13 AM Taavi Eomäe <taavieomae@gmail.com> wrote:
> >
> > Hi!
> >
> > I have a few questions about the current regdb values for Estonia/EE and EU:
> >
> > 1) There are no allowed S1G/HaLow/802.11ah EE (or EU) bands:
> >
> > Based on resources online and Estonian law
> > (https://www.riigiteataja.ee/akt/117052024018?leiaKehtiv - Extra 6)
> > these two additions should be correct:
> >
> > + (863 - 868 @ 1), (25 mW)
> > + (915.8 - 919.4 @ 1), (25 mW)
> >
> > (Note: I don't see a way to define duty-cycle limitations, but that
> > should be okay?)
>
> I'm not sure if there are plans to support S1G in Linux. If not then
> the information would go unused and untested. If it is supported, then
> patches are more than welcome.
>
> > 2) There's seems to be a missing 160MHz channel (50):
> >
> > This combines the restrictions of the two existing defined bands it
> > overlaps with (https://ttja.ee/eraklient/side-ja-meediateenused/raadioside/wifi-seadmete-kasutus):
> >
> > + (5150 - 5350 @ 160), (100 mW), NO-OUTDOOR, DFS, AUTO-BW, wmmrule=ETSI
>
> The AUTO-BW flag lets the kernel know that it can combine neighboring
> rules for wider bandwidth at the lowest power limit within the rules.
>
> Thus merging the rules is not needed. Indeed we would prefer rules not
> be merged, as the database should convey information closest to the
> regulations.
>
> > 3) The 6GHz band should also have an outdoor limit and probably also
> > allow 320MHz channels (at least in EE):
> >
> > - (5945 - 6425 @ 160), (23), NO-OUTDOOR, wmmrule=ETSI
> > + (5945 - 6425 @ 320), (25 mW), wmmrule=ETSI
> > + (5945 - 6425 @ 320), (200 mW), NO-OUTDOOR, wmmrule=ETSI
>
> The kernel currently can't deal with duplicate rules for the same
> channel. Thus we have to make a decision on whether to have a rule
> with higher power but indoor use only, or the opposite.
>
> Within our database, we have the former for some jurisdictions
> and the latter for others. It really depends on the submitter.
>
> > Would a patch for these be accepted? Should I update all EU countries
> > (considering it seems harmonized within the EU)?
>
> I would expect patches to be per country referencing local regulations,
> not just the EU one. IIUC the EU sets one harmonized regulation but then
> it's up to each member country to implement / incorporate them?
>
> Whether you would like to update other EU countries is up to you.
>
>
> Thanks
> ChenYu