基于移动主用户的认知无线网络动态频谱接入

摘要

To address the problem of spectrum access statistics with mobile primary users in cognitive wireless networks,a spec-trum access strategy based on mobile primary user was proposed.An optimal primary users’protection distance was proposed to ensure its normal communication.Channel availability was dynamically modelled by estimating the relevant distance between pri-mary user and secondary user.The optimal channel selection strategy was derived by making full advantages of primary users’ spatial temporary channel using strategy.Simulation results illustrate that the proposed strategy can improve the throughput of secondary link and ensure fairness even when it comes to increased secondary users’density.%针对具有移动主用户的认知无线网络中的频谱接入问题，提出一种基于移动主用户的动态频谱接入策略。提出主用户最优保护距离保证主用户的正常通信，对主用户与次用户之间的相对距离进行估计，利用其对信道的可用性进行动态建模，得到能充分利用主用户空间临时信道使用策略的最优信道选择策略。仿真结果表明，该策略能有效提高次级链路吞吐量，保证公平性，在次用户分布密度增加时也能取得良好的性能。