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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.
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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