Re: [6gip] Wi-Fi 6E

[Alexandre Petrescu <[e-mail]>]

Le 07/01/2021 à 16:17, [e-mail] a écrit :
> Sorry for too early submission: What I wanted to write is
> Dear all,
> on the other hand there are nearly almost multiple services and applications allocated to a frequency band as can be seen at https://efis.cept.org/sitecontent.jsp?sitecontent=ecatable for Europe (again) 

It is very interesting to see how that EU document considers
5.925MHz-6.700MHz range to be allocated for satellite EN 301 447.  Not 
only it contradicts another document considering ITS to be up to 
5.935MHz but it also covers something that WiFi 6E considers to be for 
itself.

I think this is subject to debate and could be solved.

Without a clean and agreed spectrum allocation scheme we can not dream 
about 5Gb/s WiFi with 160MHz channel widths without tresspassing some 
law.  Without that scheme we can not further dream about putting IP on 
it and IP-enabled applications and the future of networking with 
instantant 3D holograms transmitted across the Internet.

Right spectrum maps are a pre-requisite for the networking layer to 
function properly.

Then we could also think about an IP based mechanism that could exchange 
IP messages on a largely agreed 2.4GHz channel to negotiate dynamically 
that spectrum map.  Maybe some work at IETF already addressed this?

Alex

and corresponding studies on
> harmonization and interference mitigation are under way as can be seen e.g. in ETSI TR https://www.etsi.org/deliver/etsi_tr/103600_103699/103631/01.01.01_60/tr_103631v010101p.pdf
> and BTW there is an interesting article on 6G and 6E to be found here:
> https://www.6gworld.com/exclusives/wi-fi-to-symbiotically-share-wireless-ecosystem-with-5g-6g/
> My 2 cents
> Best Regards
> Dirk
> -----Original Message-----
> From: 6gip <[e-mail]> On Behalf Of von Hugo, Dirk
> Sent: Donnerstag, 7. Januar 2021 16:08
> To: [e-mail]; [e-mail]
> Cc: [e-mail]; [e-mail]
> Subject: Re: [6gip] Wi-Fi 6E
> 
> Dear all,
> on the other hand there are nearly almost multiple services and applications allocated to a frequency band as can be seen at https://efis.cept.org/sitecontent.jsp?sitecontent=ecatable for Europe (again) https://www.6gworld.com/exclusives/wi-fi-to-symbiotically-share-wireless-ecosystem-with-5g-6g/
> Viele Grüße / Best Regards
> Dirk
> 
> -----Original Message-----
> From: 6gip <[e-mail]> On Behalf Of Simon Leinen
> Sent: Donnerstag, 7. Januar 2021 11:22
> To: Alexandre Petrescu <[e-mail]>
> Cc: [e-mail]; [e-mail]
> Subject: Re: [6gip] Wi-Fi 6E
> 
> Alexandre Petrescu writes:
>>> In the US (since July 2020 I think):
>>> 5.925 GHz to 7.125 GHz
>>> In the EU (should be ratified this month(?) and passed into member
>>> state law over the subsequent six months):
>>> 5.925 GHz to 6.425 GHz
> 
>> 5.925MHz?
> 
>> Wouldn't that would overstep the ITS spectrum which was recently
>> extended up to 5.935MHz as per
>>> Commission Implementing Decision (EU) 2020/1426 of 7 October 2020 on
>>> the harmonised use of radio spectrum in the 5 875-5 935 MHz frequency
>>> band for safety-related applications of intelligent transport systems
>>> (ITS) and repealing Decision 2008/671/EC (notified under document
>>> C(2020) 6773) (Text with EEA relevance)
> 
>> https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1602230223168&uri=
>> CELEX:32020D1426
> 
> Interesting, I was unaware of this ITS assignment.
> 
> The diagrams in Chuck Lukaszewski's presentation show that both the US and the EU versions of the Wi-Fi 6E ranges start with 20MHz of "guard band", so this assignemnt should be safe; and the frequencies actually usable for Wi-Fi 6E communications only start at 5.945 GHz.  Sorry for the confusion.
> --
> Simon.
> 
>> ITS spectrum is for a WiFi used in OCB mode which stands for Outside
>> the Context of a BSSID; this means, for example, in that WiFi there is
>> no Association Req or Resp messages.  It was typically done in the
>> 5.875-5.925MHz range, but now up to 5.935MHz.
> 
>> Of maybe WiFi 6E wants to cover ITS as well.
> 
>> Alex
> 
> 
>>> ...so, at least initially, only half the amount of spectrum (the
>>> "lower half").  Maybe more later, who knows.
>>> Sorry for the US/EU-centricism.  I'm not quite sure what's happening
>>> in other countries, except that the Ofcom in the UK already stated
>>> their support for Wi-Fi 6E, also in the "lower half" range.  "Ask
>>> your local regulator", or look for information on the Internet.
>>> There's an excellent video explaining Wi-Fi 6E here, including
>>> spectrum regulation status, again in particular in the US and
>>> (EU/CEPT) Europe, and some technical differences between Wi-Fi 6 and
>>> 6E beyond the additional spectrum:
>>> https://www.youtube.com/watch?v=_fHrKaEB_fk
>>> (Kudos to Anders Nilsson from SUNET for pointing me to it.)
>>>
> 
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