认知无线网络中信道选择算法研究  

Research on channel selection algorithm in cognitive wireless network

作　　者：王欢[1] 唐伦[1] 陈前斌[1] 刘光明[1] 

机构地区：[1]重庆邮电大学移动通信技术重点实验室,重庆400065

出　　处：《数字通信》2009年第1期29-32,共4页Digital Communications and Networks

基　　金：国际科技合作项目计划(2008DFA12110);新世纪优秀人才支持计划(NCET-06-0778);重庆市自然科学基金项目(CSTC 2007BB2390;CSTC 2008BB2413);重庆市教育委员会科学技术研究项目(KJ070501;KJ080522)

摘　　要：研究认知无线网络中认知用户(secondary user,SU)的信道选择策略。在每个信道上,由于主用户(Primary user,PU)返回的概率不相同,因此SU需要接入一个成功传输概率最大的信道,以尽量避免与PU发生冲突。提出了一个基于EWA学习的信道选择算法,仿真结果表明,SU通过学习历史信道选择的经验,能自适应地选择可用性最好的信道,从而最小化与PU发生冲突的概率,有效地降低了SU进行信道切换的可能性。In this paper, the channel selection strategy for secondary users in cognitive radio network is studied. Since the returning probability of primary users on each channel is different, a secondary user needs an optimal channel to maximize the probability of successful transmissions for sequentially avoiding collisions with primary users. A channel selection algorithm based on EWA learning is proposed. Simulation result shows that with this algorithm, secondary users are able to select the optimal channel adaptively by learning the history information of channel selection, and then the secondary users could minimize the collision probability and reduce the possibility of channel switching.

关 键 词：认知无线电 EWA学习 信道选择 信道切换 

分 类 号：TN92[电子电信—通信与信息系统]