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Spectrum Sharing Optimization in Cognitive Radio Networks

Tahmasbi Sarvestani, Amin | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42129 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Hemmatyar, Ali Mohammad Afshin
  7. Abstract:
  8. The dream of increasing in service quality and channel capacity in wireless networks is severely limited by the scarcity of energy and bandwidth, which are the two fundamental resources for communications. New communications and networking paradigms such as cognitive radio networks emerged in recent years that can intelligently and efficiently utilize these scarce resources. Although cognitive users are able to make intelligent decisions on spectrum usage and communication parameters based on the sensed spectrum dynamics and other users' decisions, different network users typically belong to different operators and may pursue different goals, so fully cooperative behaviors cannot be pre-assumed. Therefore, game theory is a proper and flexible tool to analyze the interactions among selfish users. In this document, we propose a repeated spectrum sharing game with cheat-proof strategy. By using the punishment-based repeated game, users get incentive to share spectrum in a cooperative way, and through mechanism-design-based approach, user honesty is further enforced. Specific cooperation rules have been proposed base on maximum total throughput. Simulation results show that the proposed scheme maximize the spectrum efficiency by alleviating mutual interference
  9. Keywords:
  10. Game Theory ; Repeated Game ; Cognitive Radio ; Spectrum Sharing

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