An Interference-Minimization Potential Game for OFDMA-Based Distributed Spectrum Sharing Systems

作者：La Quang Duy^*; Chew Yong Huat; Soong Boon Hee

来源：IEEE Transactions on Vehicular Technology, 2011, 60(7): 3374-3385.

DOI：10.1109/TVT.2011.2158596

• Game theory
• Nash equilibrium (NE)
• orthogonal frequency-division multiple access (OFDMA)
• potential game
• spectrum sharing

Wireless orthogonal frequency-division multipleaccess (OFDMA) networks, where distributed users can access the spectrum dynamically, offer great flexibility and the potential for the efficient utilization of scarce spectrum resources. Despite that, managing such large-scale networks while maintaining fair and efficient spectrum usage poses a great challenge, mainly due to cochannel interference from the spatially reusable subcarrier. This paper considers the problem of interference minimization in such a scenario from a game-theoretical viewpoint. A general framework that defines the distributed OFDMA-based spectrum access problem is presented. Next, our game-theoretical analysis shows that the proposed interference-minimizing utility function exhibits the properties of a potential game. Given a deterministic number of subcarriers by each player, there exists a pure-strategy Nash equilibrium solution, and therefore, convergence can be guaranteed via sequential best-response dynamics. Our simulation results verify the analysis, and at the same time, the fairness and optimality of the solutions obtained through the proposed game are examined.

• 出版日期2011-9
• 单位南阳理工学院