1. IEEE P802.22 Wireless RANs Date: 2008-08-08
Month Year
doc.: IEEE /0272r0
August 2008
Overview and Simulation Results of On-demand Channel Contention for Dynamic Spectrum Sharing
IEEE P Wireless RANs Date:
Authors:
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Wendong Hu, STMicroelectronics
John Doe, Some Company

2. Month Year
doc.: IEEE /0272r0
August 2008
Abstract
This contribution presents an overview and the simulation results of the ODSC protocol for dynamic spectrum sharing in IEEE
Wendong Hu, STMicroelectronics
John Doe, Some Company

3. Outline ODSC Overview Communications Delay of ODSC
August 2008
Outline
ODSC Overview
Communications Delay of ODSC
Simulation Tool and Settings
Simulation Results
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4. Inter-WRAN Spectrum Sharing
August 2008
Inter-WRAN Spectrum Sharing
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5. On-Demand Spectrum Contention Protocol
August 2008
On-Demand Spectrum Contention Protocol
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6. Communications Delay of ODSC
August 2008
Communications Delay of ODSC
A Coexistence Scenario Example
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7. Communications Delay of ODSC (cont’d)
August 2008
Communications Delay of ODSC (cont’d)
Spectrum contention protocol communications can be completed in 1 reservation cycle (e.g. 40ms)
Wendong Hu, STMicroelectronics

8. Performance Evaluation – Tool & Settings
August 2008
Simulation Tool
NS2 (Network Simulator) [1] Model for IEEE with ODSC implemented
Simulation Parameters
Single channel sharing
Size of super-frame: 16 frames
Frame size: 10ms
Self-coexistence Window size: 1ms
Simulation time: 10,000 seconds
Coexistence Scenarios (see more next slide)
Complete Graph scenarios
Cycle Graph scenarios
Wheel Graph scenarios
Evaluation Metrics
Fairness and Convergence Time
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9. Coexistence Scenarios
August 2008
Coexistence Scenarios
Complete
Cycle
Wheel
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10. Performance Evaluation – Results (1)
August 2008
Performance Evaluation – Results (1)
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11. Performance Evaluation – Results (2)
August 2008
Performance Evaluation – Results (2)
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12. Performance Evaluation – Results (3)
August 2008
Performance Evaluation – Results (3)
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13. Fairness and Convergence Time
August 2008
Fairness and Convergence Time
[2]
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14. August 2008
References
[1] “The network simulator – ns-2,”
[2] Jain, R., Chiu, D.M., and Hawe, W. (1984) A Quantitative Measure of Fairness and Discrimination for Resource Allocation in Shared Systems. DEC Research Report TR-301
Wendong Hu, STMicroelectronics