G’day Ben
I will start by
noticing that you gave me a gender reassignment. Excellent,
Andrew one day and Andrea the next!
J
That aside, I
will say that I was a little loose in my language. When I
mentioned the “only game in town” I was mainly focusing on
WLAN-like applications.
Of course,
there are many other systems using the unlicensed bands, and
over the years our efforts, market drivers and a little bit
of luck have meant that either Wi-Fi and these systems
coexist reasonably well in these bands or they have
generally avoided each other in these bands. There are a
small number of systems where neither option is reasonably
possible, and these systems have tended to go elsewhere (but
not always).
By focusing on
WLAN, I was not commenting on the need (or otherwise) of
Wi-Fi and NR-U to coexist with other systems. Rather, I was
highlighting that Wi-F and NR-U need to coexist with each
other as a starting point, and that IEEE 802.11 Coex SC is
where this discussion is taking place within IEEE 802. IEEE
802.19 (and IEEEE 802.18) are the forums where other
coexistence combinations should continue to be discussed.
Hope that helps
mitigate your concerns
Andrew
Hi
Andrea,
Thank
you for the information and outreach, and specifically to
those with interests in the 6 GHz band. I read this to
indicate that you wish to include coexistence with all
services, including other 802 wireless, in the scope of the
study group - which is a great idea IMO. If that's the
wrong read, please correct.
I
think you hit a key attitude issue with your "only game in
town"; depending on what "town" you mean, in most of the
world this has not been a true statement for decades. There
are in fact many license exempt uses besides WiFi, and many
billions of of those licensed exempt device are based upon
802 standards other than 802.11. WiFi provides a visible
label which consumers recognize, which shows up on the
outside of the box. There are 802 wireless standards
enabling operation in a diverse range devices. 802.15.4 in
particular is used in a dizzying array of applications where
high bits/sec is not the critical performance metric, which
includes some rapidly growing application areas such as
secure entry. Perhaps the reason many people feel WiFi is
the "only game in town" is because in 802 we've taken
coexistence seriously and consider the impacts of new
standards on the operation of other 802 standards. Seriously
- good coexistence is an factor in market success. One of
those not noticed things until it's noticed: when you do it
right it's not noticed, when we don't, being noticed is a
bad thing. We've seen this suppressing 802.11 use in
applications where it's feared to be disruptive e.g. 900 MHz
11ah. It really is in "our" best interests to consider how
to coexist!
Preaching
to the choir I suppose, consider it an hearty endorsement of
your efforts! If there's an argument in there that helps
you, better still.
I
may be able to provide a short presentation on 6 GHz
coexistence at the November meeting, depending on when the
SC meets. I've not seen the consolidated schedule yet -
when does your SC meet? I promise to keep it positive.
Thanks
again,
G'day
Ben
On 10/11/2018 11:01 PM, Andrew Myles
(amyles) wrote:
--- This message came from the IEEE
802.11 Working Group Reflector ---
G’day all
This e-mail is for those participants of
IEEE 802.11 WG who are those interested in coexistence of
802.11 with other technologies in unlicensed bands. That
should include anyone who cares about the ongoing success of
802.11ac, the upcoming success of 802.11ax in both 5GHz and
6GHz bands or the future success of 802.11 EHT!
Unlike in the past when Wi-Fi was the
“only game in town”, the licensed radio community is looking
at the extensive use of unlicensed spectrum to complement
their licensed spectrum. They are also planning to leverage
their LTE technology to operate in unlicensed spectrum in
modes that does not require the use of licensed spectrum. I
am confident that Wi-Fi can compete against these threats.
However, my confidence is dependent on some concept of fair
coexistence between the technologies when operating at the
same time in the same channel.
The IEEE 802.11 Coex SC has been working
for the last two years or so to make sure this is the case.
The SC will be meeting again in Bangkok in at the IEEE 802
Plenary in November. The draft agenda is available in
11-18-1729-01. The main items of interest on the draft
agenda are:
·
Review of the
recent ETSI BRAN meeting
o
BRAN is discussing
rules for 5GHz operation in Europe
o
It is progressing
slowly …
o
… which has some
risks for the Wi-Fi industry
·
Review of the
recent 3GPP RAN1 meeting
o
RAN is currently
defining NR-U
o
A significant issue
is that many RAN1 participants have very little
understanding of 802.11 …
o
… and often use
incorrect assertions about 802.11 to justify poor NR-U
design choices
·
Discussion of
proposed 802.11/RAN coexistence Workshop
o
RAN1 have agreed to
the Workshop in principle …
o
… but the date and
location are up in the air!
o
While those details
are being sorted out …
o
… we need to start
preparations
·
… and more
One important purpose of this e-mail is a
call for contributions. The SC would particularly
appreciate:
·
Submissions on
RAN1 activities related to coexistence
o
Known topics include:
§
Use of 11a, common or
NR-U specific preamble by NR-U
§
Non-use of LBT
mechanisms for DRS (similar to a Beacon) and other
management frames
§
Plans for NRU to be
more aggressive in 6GHz bands where Wi-Fi has non incumbency
§
…
·
Submissions
related to the proposed 802.11/RAN coexistence Workshop
o
Possible topics
include:
§
Agenda suggestions
and process for the workshop
§
Topics for discussion
at workshop
§
…
Please notify
me ASAP if you are planning to make a submission!
|
Andrew Myles
Chair of IEEE
802.11 Coex SC
|
|
Andrew
Myles
Manager, Enterprise Standards
amyles@xxxxxxxxx
Phone: +61 2 8446 1010
Mobile: +61 418 656587
|
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