一种基于动态拓扑的认知无线电网络频谱分配策略
首发时间:2009-02-20
摘要:在认知无线电网络中,拓扑结构是随着主要用户以及次要用户的加入或退出而随时变化,所以设计一种可以根据动态拓扑随时调整的分布式的频谱分配策略就变的非常重要。本文提出一种基于博弈的动态频谱分配策略,其中,多个主要用户通过竞争向次要用户提供可用频段。此外,本文分析了动态拓扑对纳什均衡的影响。
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A Game-Based Spectrum Offering Scheme in Cognitive Radio Networks with Dynamic Topology
Abstract:In practical cognitive radio networks, the topology is constantly changing since the primary and secondary users join and leave the network at any moment. So it is very important to design a distributed spectrum offering scheme that can coordinate the spectrum offering scheme adapt to dynamic topology with only local information. In this paper, we propose a game-based distributed spectrum offering scheme in cognitive radio network with dynamic topology in which multiple primary users with spectrum opportunity compete with each other to offer spectrum access to the secondary users. We obtain the Nash equilibrium of the game and analyze the impacts of the dynamic topology on the Nash equilibrium. In addition, we present a iterative distributed spectrum offering algorithm for the case when the topology is rapidly changing.
Keywords: Cognitive radio game model Nash equilibrium
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No.2933928577912350****
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