1. IEEE P802.22 Wireless RANs Date: 2007-07-02
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 based on IEEE P working draft.
It is updated based on the conference call of June 25, 2007.
In slide 3 : Incumbent database and Regulation and operation are now connected to BS via upper layer
In slide 3 : Bring Geo-location into the BS entity asﾊWinston requested.
Add slide 7 : MAC-SM interface (contribution by Dave Cavalcanti)
Added slide 8 : Add a slide to define when sensing occurred.
Kyutae Lim, GEDC, Georgia Tech

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

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

5. MAC - SM Interface July 2007 Base station CPE# ... ... ... PHY MAC SM
SSF
PHY
MAC
Request
CH# for sensing
CPE # for DB
SSF SM
CH1 info
...
CH-N info
CH Set CPE#
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

6. (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 and Incumbent database.
-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
Cap of TPC
DFS management
Inter network communication
Adaptive modulation
Spectrum sharing
Adaptive beamforming
Kyutae Lim, GEDC, Georgia Tech

7. MAC-SM Interface (BS) July 2007 Generic Management Primitives
GET/SET/RESET primitives are defined in the MLME and PLME with the SM to enable:
Initialization, access, and reset of MAC/PHY attributes (i.e. PHY/MAC MIB attributes)
MLME SAP Interface with the SM
Spectrum Sensing Primitives:
MLME-SpectrumSensing.Request (…)
MLME-SpectrumSensing.Confirm (…)
Channel Management
MLME-ChannelSwitch.Request (…)
MLME-ChannelSwitch.Confirm (…)
MLME-ChannelTerminate.Request (…)
MLME-ChannelTerminate.Confirm (…)
MLME-ChannelQuiet.Request (…)
MLME-ChannelQuiet.Confirm(…)
Channel Sets Information:
MLME-CHOccupancy-Update.Request (…)
Result: BS sends updated channel set information to CPE(s)
MLME-CHOccupancy-Update.Confirm (…)
Kyutae Lim, GEDC, Georgia Tech

8. When does sensing? July 2007 Whole CH In-band (CH-n) CH-n+1/n-1 Any CH
@ 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/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 (or CPE)
For distribute sensing
Kyutae Lim, GEDC, Georgia Tech

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