计算机工程与应用2012，Vol.48Issue(27)：17-21,5.DOI:10.3778/j.issn.1002-8331.2012.27.004
基于信道预测的认知无线电混合频谱切换算法
Mixed spectrum handoff algorithm for cognitive radio based on channel state prediction
摘要
Abstract
A mixed spectrum handoff algorithm which combines reactive spectrum handoff and proactive spectrum handoff is proposed in Cognitive Radio Networks (CRNs). Based on the continuous-time markov chain of Primary Users' (Pus') channels, the algorithm predicts the future channel state and performs proactive spectrum handoff for serving Secondary Users (Sus). Meanwhile, the algorithm performs reactive spectrum handoff for collision Sus. Simulation results show that compared with the reactive spectrum handoff algorithm, the proposed algorithm can dramatically reduce the number of collisions between Sus and Pus on the premise of unchanged SU' s blocking probability and outage probability. Moreover, the spectrum efficiency of the CRN can be increased in the proposed algorithm.关键词
认知无线电/频谱切换/连续时间马尔可夫链/碰撞次数Key words
cognitive radio/ spectrum handoff/ continuous-time markov chain/ number of collisions分类
信息技术与安全科学引用本文复制引用
唐万斌,喻火根,李少谦..基于信道预测的认知无线电混合频谱切换算法[J].计算机工程与应用,2012,48(27):17-21,5.基金项目
国家重点基础研究发展规划(973)(No.2009CB320405) （973）
国家自然科学基金(No.61071102) （No.61071102）
国家科技重大专项(No.2010ZX03006-002,No.2010ZX03002-008-03). （No.2010ZX03006-002,No.2010ZX03002-008-03）
