关键词: 认知无线网络；动态频谱分配；空间拥塞博弈；自适应负载;效用设计

Abstract:

In the future of cognitive wireless networks, spectrum owners in specific region will control a large number of spectrums in different bandwidth and use them to provide different cognitive users with communication services, then how to improve the reliability of the dynamic spectrum access in order to achieve load balancing of spectrum access has become a key issue in the spectrumallocating environment with the coexistence of multiple spectrum providers and cognitive users. This paper simplifies the aforementioned manytomany allocation problem and proposes a dynamic spectrum allocation algorithm based on spatial congestion games with adaptive load balancing by using the extended analysis of Space Congestion Game (SCG) model. The theoretical analysis of existence of its Nash equilibrium is given, and then the utility function added with load regulating is elaborated. Simulations show that this algorithm can not only accelerate the convergence rate, but also improve the spectrum utilization efficiency, thus ameliorating the reliability of spectrum access and finally achieving a load balancing.

Key words: cognitive wireless networks;dynamic spectrum allocation;spatial congestion games;adaptive load balancing;utility design