Steve,
I’m curious why .16h has developed or is developing a
coexistence mechanism for the 5 – 6 GHz frequency band. There are specific technologies
in ITU-R Recommendation M.1450 that are to be used in the unlicensed portions
of that band. True, in some countries the rules governing the 5.8 GHz portion
could permit .16h.
Is there an intention to try and add .16h to M.1450 or is .16h
only intended for use at 5.8 GHz in those countries whose regulations permit
it? If the former then .16h will have to have a DFS or DFS like capability to
sense the non-RLAN systems that share the unlicensed band segments.
WRC-2003 established very clear requirements for RLAN use of the
5 GHz frequency band. DFS is not an optional requirement for coexistence in the
5250 – 5350 and 5470 – 5725 MHz portions of that frequency band.
Regards,
Mike
From: 강현덕 [mailto:henry@xxxxxxxxxx]
Sent: Tuesday, July 07, 2009 20:44
To: STDS-802-19@xxxxxxxxxxxxxxxxx
Subject: Re: [802.19] Link to 802.16h CA doc
FYI
This
document deals with coordinated coexistence mechanism called CX-CBP
(coordinated contention based protocol).
802.16h
(improved coexistence mechanisms for license-exempt
operation) mainly consists of three different degignation (all
in TDD mode)
1.
WirelessHUMAN (for 5~6GHz bands)
2.
WirelessMAN-CX (for bands below 11GHz subject to non-exclusive assignment)
3.
WirelessMAN-UCP (for bands below 11GHz subject to non-exclusive assignment)
CX-CBP
belongs to WirelessMAN-CX.
Uncoordinated
coexistence mechanism belongs to WirelessMAN-UCP.
Hyunduk
-----원본 메시지-----
From: "Shellhammer, Steve" <sshellha@xxxxxxxxxxxx>
From Date: 2009-07-08 오전 8:38:09
To: "STDS-802-19@xxxxxxxxxxxxxxxxx"
<STDS-802-19@xxxxxxxxxxxxxxxxx>
Cc:
Subject: Link to 802.16h CA doc
Here
is the link to the 16h CA document,
Steve