RE: [REGDB] Update for Costa Rica (CR) regulatory domain

[Ping-Ke Shih <pkshih@realtek.com>]

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Ping-Ke Shih <pkshih@realtek.com> wrote:
> Avalon Vargas Centeno <avalon.vargas.centeno@est.una.ac.cr> wrote:
> > I am reporting an issue with the wireless regulatory domain for Costa Rica (CR)
> >  in the wireless - regdb. The current rules appear to be overly restrictive,
> >  causing significant performance degradation on modern Wi-Fi 6 hardware and
> >  devices using the 5Ghz band.
> >
> > The issue:
> > When the regulatory domain is set to my country (CR), my Wi-Fi throughput
> >  is capped at approximately 100 Mbps. When I manually set the domain to US
> >  or other countries, I achieve my connection's full speed of ~600 Mbps.
> >  The information obtained from the command: iw reg get, displays how the
> >  5Ghz bands are getting bottlenecked by their max bandwidth of 20Mhz while
> >  apparently wifi 7 6Ghz has been updated.
> >
> > Hardware info:
> > ‧Device: Linux desktop running Fedora 42, also tested on the latest public
> >  stable(non lts )kernel using Arch linux
> > ‧Wi-Fi Adapter: TP-Link Archer T2OE (Realtek RTL8852AE)
> > ‧Kernel version: 6.15.9-201.fc42.x86_64
> >
> > Attachments:
> > Below I attached appropriate screenshots showcasing the difference in the
> >  interface information between regulatory domains.
> >
> 
> By [1], 40 and 80MHz channels are not allowed on 5GHz for CR, but there is
> no reference to know if the limitation is removed now.
> 
> Not sure if Jouni (Cc'd) can remember this.
> 
> [1] https://lore.kernel.org/wireless-regdb/1422013872-9732-1-git-send-email-jouni@qca.qualcomm.com/
> 

As Avalon got comments from SUTEL (as attachment), I also found a public
link [1]. Then I'll prepare a patch for changes of bandwidth and etc
accordingly. 

[1] https://pgrweb.go.cr/scij/Busqueda/Normativa/Normas/nrm_texto_completo.aspx?param1=NRTC&nValor1=1&nValor2=99551&nValor3=144158&strTipM=TC




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