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Subject: Re: [RFC 0/8] nl80211: add 6GHz band support
From:   Arend Van Spriel <arend.vanspriel@broadcom.com>
To:     Johannes Berg <johannes@sipsolutions.net>
Cc:     linux-wireless@vger.kernel.org
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Date:   Fri, 21 Jun 2019 21:41:49 +0200
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On 6/3/2019 12:39 PM, Arend Van Spriel wrote:
> On 5/27/2019 10:46 PM, Arend Van Spriel wrote:
>> On 5/24/2019 8:38 PM, Arend Van Spriel wrote:
>>> On May 24, 2019 1:56:43 PM Johannes Berg <johannes@sipsolutions.net> 
>>> wrote:
>>>
>>>> Hi Arend,
>>>>
>>>> On Mon, 2019-05-20 at 14:00 +0200, Arend van Spriel wrote:
>>>>> In 802.11ax D4.0 a new band has been proposed. This series contains
>>>>> changes to cfg80211 for supporting this band. With 2GHz and 5GHz there
>>>>> was no overlap in channel number. However, this new band has channel
>>>>> numbers with a range from 1 up to 253.
>>>>
>>>> At the wireless workshop in Prague, we looked at this and sort of
>>>> decided that it'd be better to put all the 6 GHz channels into the 5 
>>>> GHz
>>>> "band" in nl80211, to avoid all the "5 || 6" since they're really the
>>>> same except for very specific places like scanning.
>>>
>>> Would have liked to be there, but attending is no longer an option 
>>> for me. We now have two autistic, non-verbal children and I am the 
>>> primary caregiver for the oldest because my wife can't handle him. 
>>> Guess I should have checked the workshop notes before working on this 
>>> :-) Do you have URL?
>>
>> Found the netdev wifi workshop page and looked over the slides 
>> quickly, but the notes page is pretty empty ;-)
>>
>>> Agree that most functional requirements for 6 GHz are same as 5 GHz. 
>>> There are some 6 GHz specifics about beaconing as well.
>>
>> This came up in discussion with my colleagues today and I would say 
>> from mac80211 perspective there is more to it than just scanning. In 
>> short the 6GHz band is for HE-only operation so for example only HE 
>> rates may be used. As the bitrates are in ieee80211_supported_band 
>> having a separate 6GHz band seems to have a (slight?) advantage.
> 
> Hi, Johannes
> 
> Any thoughts on this?

Hi Johannes,

It has been a while so maybe your thoughts are more concrete? ;-p

I really would like this to move forward as I also noticed hostapd 
changes being posted for 6GHz support yesterday.

Thanks,
Arend