1. Spectrum Measurement for TGad
January 2010
doc.: IEEE xx/xxx1r0
Spectrum Measurement for TGad
Date:
Authors:
Name
Affiliations
Address
Phone
David Tung Chong Wong
Institute for Infocomm Research (I2R), A*STAR
1 Fusionopolis Way, #21-01 Connexis, Singapore
Xiaoming Peng
I2R, A*STAR
Same as above
Francois Chin
Xuhong Qu
Raymond Jararaj s/o Jayabal
David Wong, I2R

2. January 2010
doc.: IEEE xx/xxx1r0
Abstract
We propose a spectrum measurement technique for two MAC structures.
Allow the TGad network to detect the other 60GHz/TGad network(s).
Our scenario covers the case when both TGad network and another 60GHz/TGad network are in operations and the other 60GHz/TGad network move into the vicinity of the TGad network under consideration.
David Wong, I2R

3. Spectrum measurement in MAC Structure 1
January 2010
doc.: IEEE xx/xxx1r0
Spectrum measurement in MAC Structure 1 …
Beacon interval m-1
Beacon interval m
Beacon interval m+1 …
Beacon Period
Association Beamforming Period
Association Period
Contention Period 1
Reservation Period 1
Reservation Period 2
Contention Period 2
Quasi-omni Quiet Period
Quasi-omni Reporting Period
Dir. #1 …
Dir. #n
Dir. #1 …
Dir. #n
Station #1 sensingreport …
Station #m sensingreport
Mini-slots for sensing reports by all stations in direction #1.
David Wong, I2R

4. Spectrum measurement in MAC Structure 2
January 2010
doc.: IEEE xx/xxx1r0
Spectrum measurement in MAC Structure 2 …
Beacon interval m-1
Beacon interval m
Beacon interval m+1 …
Beacon Period
Contention Period
Contention Period
Quasi-omni Quiet Period
Quasi-omni Reporting Period
Dir. #1 …
Dir. #n
Dir. #1 …
Dir. #n
Station #1 sensingreport …
Station #m sensingreport
Mini-slots for sensing reports by all stations in direction #1.
Slide 4
Page 4
David Wong, I2R

5. January 2010
doc.: IEEE xx/xxx1r0
Main Additions
Quasi-omni Quiet Period
Quasi-omni Reporting Period
The main additions to the MAC structures are the quasi-omni quiet period and the quasi-omni reporting period.
There are multiple sub-quiet periods under the Quiet Period. Each sub-quiet period is used by the AP or station to sense for the other network in their particular direction out of the n possible directions.
Example of collaborative multi-direction sensing in the quiet period
David Wong, I2R

6. Main Additions for Coexistence (2/3)
January 2010
doc.: IEEE xx/xxx1r0
Main Additions for Coexistence (2/3)
Note that the initial direction of sensing by each station should be in such a way that all stations in that sector cover different directions.
This can be assigned to the station by the AP when it associates with the AP.
Another way is to use the station’s MAC address and compute it, that is, (MAC address MOD n).
Thus, the AP and the stations are sensing collaboratively in multiple directions as whole during the quiet period.
There are also multiple mini-slots in the different directions for the stations to report their sensing outcomes.
David Wong, I2R

7. Main Additions for Coexistence (3/3)
January 2010
doc.: IEEE xx/xxx1r0
Main Additions for Coexistence (3/3)
The mini-slots in different direction can be dynamically assigned to stations by the AP when the stations associate with the AP and indicated in a new field in the beacon period in that direction.
The particular mini-slot for a station will be removed when the station disassociates from the AP.
The AP decides if the other TGad network is present or not, based on the data fusion rules like OR-fusion rule, AND-fusion rule or Majority fusion rule.
David Wong, I2R

8. January 2010
doc.: IEEE xx/xxx1r0
Summary
We propose a spectrum measurement technique to detect other 60GHz/TGad network(s) for two MAC structures.
The TGad network could then move to another band.
The options for spectrum measurement cater for the case when the TGad network and another 60GHz/TGad network, both in operations, come into contact.
These options can be used in every beacon interval, or once in a number of beacon intervals.
David Wong, I2R

9. January 2010
doc.: IEEE xx/xxx1r0
References
ad-Basic-TGad-MAC-Layer-Proposals-and-Options-for-Coexistence
ad-proposed-evaluation methodology-additions
contention-based directional MAC protocols: a survey
David Wong, I2R

10. January 2010
doc.: IEEE xx/xxx1r0
Straw Poll
Do you support inclusion of the technique,     - Spectrum Measurement as described in 11-10/0507r0 in the TGad draft amendment? Y: N: A:
Slide 10
David Wong, I2R