认知无线电频谱切换概率研究  

Research on the spectrum handoff probability in cognitive radio

作　　者：林法杰[1] 薛伟[1] 张玉兵[1] 

机构地区：[1]江南大学物联网工程学院,无锡214122

出　　处：《电子测量技术》2014年第7期22-26,共5页Electronic Measurement Technology

摘　　要：为了解决认知无线网络中认知用户频繁切换的问题,最大程度上降低认知用户的切换次数,在已建频谱池的基础上,提出了频谱空穴空闲时间由长到短的排队时间和信道匹配模型,并对该模型下的频谱切换概率问题进行对比研究。推导了认知用户一次认知业务请求服务时间内发生频谱切换的概率公式,研究了授权用户到达率与认知用户到达率对频谱切换概率的影响,给出了频谱切换的概率仿真,仿真证明信道匹配模型的效果更好。In order to solve cognitive users frequent switching in the cognitive wireless network,and minimizes the number of cognitive users handoff,the spectrum holes model that free time from long to short waiting time is built based on spectrum pooling,and compared to non queuing model.Then it infers probability formula within a cognitive service request time of arising spectrum handoff,and researches effect that primary user arrival rate and the cognitive user arrival rate take on the spectrum handoff probability,given the probability simulation of spectrum handoff,simulation results show that this model is better than the random channel selection.

关 键 词：认知无线电 频谱切换 空闲时间 信道匹配 切换概率 

分 类 号：TN911.25[电子电信—通信与信息系统]