Spectrum Sharing Game with Flexible Channelization for Non-Cooperative Wireless Networks

Flexible channelization can enhance spectrum efficiency by adapting channel bandwidth and center frequency compared with traditional fixed width channel. The key challenge of this new mechanism lies in how to determine proper channel width for each link in a distributed manner without coordination. In this work, we investigate the spectrum sharing problem with flexible channelization from game-theoretic perspective, in which the nodes are rational and pursue their own objects through selecting proper channel width and frequency. Compared with current related works, the proposed game can convergence to an efficient Nash equilibrium without any exogenous factor such as charging or incentive scheme that influence nodes´ behavior. We cast the game to a potential game by exploiting the structure of payoff function and propose distributed algorithm to achieve Nash equilibrium.