基于严格位势博弈的动态预留信道选择

Dynamic selection for channel reservation based on exact potential game

由于认知无线电网络中可用频谱存在时变特性,以往频谱切换中静态式的信道预留方式显然不能满足实际要求。为解决这一问题,在讨论认知无线电交互模型与博弈论的基础上,提出了基于严格位势博弈的动态预留信道选择方法,该方法将认知网络作为一种干扰减小网络,利用博弈交互原理实现动态参数的调整。在802.11h平台下给出了性能仿真分析。结果表明,该方法能够在增加少量网络总干扰的情况下实现动态预留信道选择,并且所预留的信道不受环境影响,从而适用于所有网络覆盖范围。

Due to the time-varying characteristics of available spectrum in cognitive radio networks, the static reservation considered previously in the spectrum handoff is obviously not suitable for the actual environment. To solve this problem, the interactive model and game theory of cognitive radio are discussed and a scheme of dynamic selection for channel reservation based on exact potential game is proposed in this paper. This scheme considers cognitive radio as a kind of interference reducing network and achieves adjustments of dynamic parameters according to the interactive game theory. Tests results under the 802.11h settings show that the channel can be dynamic reserved with a slight increase in network interference. Moreover, the reserved channel is not subject to the environment and thus applied to all of the network coverage.