IEEE 802.19 TAG,
Paul Nikolich would like the
opinion of the 802.19 members on the 40 MHz 802.11n discussion.
If you have an opinion to
share please “reply-all” so that everyone can hear your opinion.
Regards,
Steve
From: Paul Nikolich
[mailto:paul.nikolich@att.net]
Sent: Saturday, May 24, 2008 7:06
AM
To: Shellhammer, Steve
Subject: Fw: [802.15_GENERAL] TGn
Letter Ballot Support
What is dot19's opinion on the below debate?
----- Original Message -----
Sent: Friday, May 23,
2008 10:29 PM
Subject: Re:
[802.15_GENERAL] TGn Letter Ballot Support
I will be voting YES on TGn LB129,
and I would urge others who are interested in defending 802.15.x devices' access
to the ISMii band to vote YES as well.
The current draft of the 802.11 TGn
amendment contains normative language describing a mechanism (i.e. the 40 MHz
Intolerant bit) that allows non-related devices to signal to the 40 MHz TGn
devices that they cannot send 40 MHz transmissions, effectively allowing
other users of the ISMii band to restrict the use of 40 MHz transmissions by
TGn devices. 40 MHz 802.11 TGn devices are required to obey this signaling
whenever it occurs.
If 40 MHz operation is forbidden in
ISMii by 802.11 TGn, then 40 MHz operation will be implemented as a set of
vendor-specific non-standardized modes with variable degrees of good
citizenship regarding spectrum sharing and with little or no opportunity for such
devices to be controled by other users of the ISMii band.
For these reasons, it is in the best
interest of 802.15.x technology providers and other users of the ISMii
band to vote YES on the TGn-standardized mode of 40 MHz
operation that includes specific requirements to force TGn devices to
cease 40 MHz operation when requested.
Matthew Fischer
Nice Guy
+1 408 543 3370 office
+1 650 796 9206 mobile
mfischer@broadcom.com
From: John Barr
[mailto:john.barr@MOTOROLA.COM]
Sent: Friday, May 23, 2008 8:36 AM
To:
STDS-802-WPAN@LISTSERV.IEEE.ORG
Subject: [802.15_GENERAL] TGn
Letter Ballot Support
As mentioned in Jacksonville, the
current draft of TGn includes use of 40 MHz channels in 2.4 GHz spectrum. This
will significantly impair ability of other IEEE standards using 2.4 GHz
spectrum to coexist with TGn devices running at 40 MHz. Even though the
rejection of my comment number 6069 states that there is provision for
coexistence with other radio systems using 2.4 GHz spectrum, the actual text
for this is informative and does not actually include tests for IEEE 802.15.1
nor IEEE 802.15.4 devices. See attached note to TGn I sent during the Jacksonville meeting. At the one session where there was any discussion on my comment, I
spoke against the resolution and no one spoke for the resolution rejecting my
suggested change (not to allow any use of 40 MHz channels in 2.4 GHz spectrum).
(See attached)
As it current stands there is no clear method to prevent use of 40 MHz channels
in 2.4 GHz when IEEE 802.15.1 and 802.15.4 devices are operating in the same
spectrum.
You can vote against the current TGn letter ballot by referencing my comment
(6069) that is unresolved (not accepted by the submitter) and requesting the
same resolution: In 20.3.15 change "When using 40 MHz channels,
it can operate in the channels defined in 20.3.15.1 and 20.3.15.2." to
"When using 40 MHz channels, it can only operate in the channels defined
in 20.3.15.2."
James Gilb may be able to clarify just how to vote on this. Voters who
previously approved the original LB can change their vote to disapprove based
on this comment.
Thank you for your support.
Regards, John
--
John R. Barr (John.Barr@Motorola.com)
Director, Standards Realization - <http://www.motorola.com>
Vice Chairman of the Board, Bluetooth SIG - <http://www.bluetooth.org>
(847) 576-8706 (office) +1-847-962-5407 (mobile) (847) 576-6758 (FAX)