Re: [802.19] Minutes of the 802.19 TVWS call on August 25th.
Gerals,
This strikes me as too important to bury in an updated version of a
telecon minutes. I recommend that you prepare a brief contribution on
this subject and arrange with Steve Shellhammer for a time to present
it. If I can be of any help in this, please let me know.
Mark
Mark Cummings, Ph.D.
+1 650 854 4406
348 Camino al Lago
Atherton, Ca. 94027
Managing Partner, enVia Technology Partners, Inc.
Special Member Board of Directors SVC Wireless (Silicon Valley China
Wireless Technology Association)
Member Special Committee, Technical Committee of Software Radio,
IEICE, Japan
On Sep 6, 2009, at 10:11 AM, Gerald Chouinard wrote:
Steve,
Since the minutes of the previous call were not approved, I would
like to propose some clarification on what I said during the
teleconference.
The item listed at the bottom of the second page of document
19-09-0059r2 which currently reads:
"G Chounaird: 802.22 coexistence mechanisms are used on different
levels. This requires specific behavior to trigger these behaviors."
should be modified to read as follows:
"G. Chouinard: 802.22 coexistence mechanisms have been defined to
operate in two levels. The first level is when there is sufficient
TV channels to accommodate all WRAN systems. Spectrum etiquette is
then used to allocate different TV channels to the various WRAN
systems, the first condition being to avoid duplicate use of the
same channel to avoid collision and the second condition being to
avoid that WRAN systems select the same backup to avoid collision
when these systems need to move channel due to presence of
incumbents. This is done by detecting the operation of other WRAN
systems before starting to operate and acquiring the list of backup
channels from these existing WRAN systems through the "coexistence
beacon" and re-deploying these backup channels with the new WRAN
system coming on board to avoid duplication of the first backup
channel. The second level of coexistence mechanism comes in when
there is not enough TV channels to accommodate all WRAN systems in
the same area. Frame-based contention is then used with information
exchange through the "coexistence beacon" among the WRAN cells to
dynamically allocate each of the 16 frames of the superframes
according to the capacity need of each WRAN cell using the same TV
channel."
Thank you,
Gerald