WLAN中非合作博弈的信道分配研究

Research on non-cooperative variable-width channels allocation in WLAN

为解决基于802.11无线局域网中固定信道结构导致的因客户需求不均衡而产生的信道频谱分配不公平和系统效用率低的问题,提出了基于认知无线电技术的可变带宽信道分配方法,建立了无线局域网中频谱分配的非合作博弈模型。在该多接入点无线网络博弈模型中,重点考虑非重叠频谱的单碰撞域方案,在证明存在公平的且是系统最优的纯纳什均衡的基础上,给出单阶段的公平的信道分配算法。仿真实验结果表明,该分配方案无论在信道使用公平性还是系统效用上都优于固定信道和非纳什均衡的分配方式。

To solve the problem of unfair channel allocation and inefficient use of spectrum, which is caused by customer＇s requirements is not balanced result in fixed channelization structure used by IEEE 802. ll-based WLANs, a method of variablewidth channel allocation based on cognitive radio for selfish APs is put forward, and the model of non-cooperative game strategy of channel allocation in WLAN is designed, which is focused on the non-overlapping variable-width channel allocation for selfish APs in a single collision domain in this multiple APs game of this WLAN model. In this game, it is proved that the fair and system-optimal Nash equilibrium exists. Based on which, a simple protocol to achieve one of these desirable Nash equilibrium allocation in a time slot is provided. In the simulation, it is demonstrated that this algorithm is better than the fixed channel allocation and non-Nash equilibrium allocation algorithms in fairness and system utilities of optimization.