1. IEEE P802.22 Wireless RANs Date: 2007-07-17
July 2007
MAC-SM-SSF Interface
IEEE P Wireless RANs Date:
Authors:
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Kyutae Lim, GEDC, Georgia Tech

2. July 2007
Abstract
The presentation describes the overall system architecture and interfaces between Spectrum Manager, MAC, Spectrum Sensing Function, Incumbent Database, Regulation and Geolocation based on IEEE P working draft.
Kyutae Lim, GEDC, Georgia Tech

3. Contents Protocol Reference Model and Scope of SM
July 2007
Contents
Protocol Reference Model and Scope of SM
Overall architecture and flow of information
Harmonization between SM and Quite time
Functional list of SM
Slide 3
Kyutae Lim, GEDC, Georgia Tech
Page 3

4. Protocol Reference Model and Scope of SM
July 2007
Protocol Reference Model and Scope of SM
Kyutae Lim, GEDC, Georgia Tech

5. Protocol Reference Model of IEEE 802.11
July 2007
Protocol Reference Model of IEEE
PLCP: Physical Layer Convergence Procedure
PMD: Physical Medium Dependent PLME: Physical Layer Management Entity
MLME: MAC Layer Management Entity
SAP: Service Access Point
Kyutae Lim, GEDC, Georgia Tech

6. Protocol Reference Model of 802.16
July 2007
Protocol Reference Model of
*PRM: Protocol Reference Model
Kyutae Lim, GEDC, Georgia Tech

7. PRM of IEEE 802.22 in current draft
July 2007
PRM of IEEE in current draft
Kyutae Lim, GEDC, Georgia Tech

8. Higher Layers: IP, ATM, 1394, etc. Convergence Sub-layer /
July 2007
IEEE Scope
Higher Layers: IP, ATM, 1394, etc.
Station
Management Entity
Convergence Sub-layer /
Bridge (e.g., 802.1d)
MAC SAP
Spectrum
Manager
Channel
Set list
MAC
Management
Entity
MAC
MLME SAP
PHY SAP
MLME_PLME
SAP
SM-SSF SAP
SSF
PHY
PHY
Management
Entity
PLME SAP
Scope of
Kyutae Lim, GEDC, Georgia Tech

9. Overall architecture and flow of information
July 2007
Overall architecture and flow of information
Kyutae Lim, GEDC, Georgia Tech

10. Overall System Architecture
Higher Layers (IP, ATM, 1394 etc)
July 2007
Overall System Architecture
Incumbent
Database
Regulation and
Operational
considerations
Spectrum
Manager
PHY
Convergence
Sub-layer/Bridge
MAC Common part
SSF
Geo
location
PHY
MAC SM
SSF
Geo
location
PHY
MAC SM
SSF
Geo
location
PHY
MAC SM
SSF
Geo
location …
CPE#1
CPE#2
CPE#N
Kyutae Lim, GEDC, Georgia Tech

11. Sensing Information Flaw
Higher Layers (IP, ATM, 1394 etc)
July 2007
Sensing Information Flaw
Incumbent
Database
Regulation and
Operational
considerations
Base-station
CPE #N
Spectrum Manager
SM (CPE)
PHY
PHY
CPE CH Set #N
Active Set
Occupied Set
Candidate/
Backup Set
Null Set
Disallowed
set
CPE CH Set #N
Active Set
Occupied Set
Candidate/
Backup Set
Null Set
Disallowed
set
...
CPE CH Set #1
Active Set
Occupied Set
Candidate/
Backup Set
Null Set
Disallowed
set
MAC
MAC
BS CH Set #1
Active Set
Occupied Set
Candidate/
Backup Set
Null Set
Disallowed
set
SSF
Geo
location
Geo
location
SSF
Channel set classification Section in in Draft v.0.3, p.215,216
Kyutae Lim, GEDC, Georgia Tech

12. SM-SSF Interface July 2007 Base station CPE# ... ... PHY MAC SM SSF
Sensing
WRAN
Incumbent #1
...
CH parameters**
Incumbent #N
Vacant
Sensing
WRAN
Incumbent #1
...
CH parameters**
Incumbent #N
Vacant
Request
CH# for sensing
Request
CH# for sensing
** CH parameters includes Signal power, SNR, Noise power, Noise variance
Kyutae Lim, GEDC, Georgia Tech

13. Harmonization between SM and Quite time
July 2007
Harmonization between SM and Quite time
Kyutae Lim, GEDC, Georgia Tech

14. When does sensing? July 2007 Initialization In-band (CH-n) CH-n+1/n-1
@ Wake-up
Controlled by CPE-SM
To establish initial link
In-band (CH-n)
@ Quite time
Controlled by BS-SM
To detect incumbent
CH-n+1/n-1
@ Quite time or Anytime
Controlled by BS-SM
To detect incumbent
Any CH
@ Anytime
Controlled by BS-SM
For distribute sensing
Candidate/Null
@ Anytime
Controlled by CPE-SM
For distribute sensing
Out-of-band
Controlled by BS-SM
For distribute sensing
Kyutae Lim, GEDC, Georgia Tech

15. July 2007
Sensing at Quite time -Harmonization of spectrum sensing and Quiet time-
Draft v page 167 figure 55
Kyutae Lim, GEDC, Georgia Tech

16. July 2007
Functional list of SM
Kyutae Lim, GEDC, Georgia Tech

17. (Candidate) Functions of SM
July 2007
(Candidate) Functions of SM
SM in BS
Management functionalities in CPE
Channel Set Information
- Maintain/Updated Channel sets based on information collected from its sensing function, its associated CPEs, Incumbent database, , Geo-location.
-Inform CPEs of changes in Channel sets
Maintain a local copy of channel set info
Update channel set information as directed by the BS and as a result of in-band/out-of-band sensing
Control Spectrum sensing related message
- Send commands to its SSF and to CPEs’ SSFs (Sensing Request Command)
Receive sensing reports from the MAC (local reports and reports from CPEs)
Control the scheduling of the quiet periods
-Request SSF in the CPE to sense out-of-band channels, when not explicitly requested by the BS.
Channel Management
- Channel management commands
- Controls the selection of operating and backup channels based on information collected from its sensing function, from its associated CPEs, and from Incumbent databases.
Rest of Function
Protection of incumbent
Self-co-existence Spectrum sharing
-Cap of TPC
-DFS management
-Inter network communication
Kyutae Lim, GEDC, Georgia Tech

18. July 2007
Reference
Kyutae Lim, GEDC, Georgia Tech