Re: [RFC PATCH 1/2] cfg80211: Add support for ITS-G5 band (5.9 GHz)

[Michal Sojka <sojkam1@fel.cvut.cz>]

On Fri, Oct 16 2015, Johannes Berg wrote:
> Hi,
>
>> I thought that the regdb is for unlicensed bands with unrestricted use.
>> The 5.9 GHz band is not licensed but it is restricted for ITS
>> applications. 
>
> It kind of is, at least the current one is.
>
>> In http://marc.info/?l=linux-wireless&m=140183393707445&w=2
>> Luis Rodriguez suggested that having a Kconfig option may be the way to
>> go, but we may misread what he was saying.
>
> I didn't really follow this.
>
>> I assume that if this band will be in regdb, it will be too easy to use
>> this band (e.g. by mistake) for non-ITS applications.
>
> Does the *regulatory* actually prohibit that anyway though?

Regulatory (ECC Decision (08)01) reads:

    ... decides ... that CEPT administrations shall designate the
    frequency sub-band 5875-5905 MHz on a non-exclusive basis for ITS
    traffic safety applications;

I'm not sure about the exact meaning of words "designate" and
"non-exclusive". If anyone can clarify that for me, I'd appreciate it. I
tend to understand that this band can be only used by ITS applications
(without license) or by other devices that have a proper license.

Thanks.
-Michal