基于动态多频谱感知的认知无线网络信道接入策略

上海交通大学学报（自然版） ›› 2016, Vol. 50 ›› Issue (05): 788-795.

• 无线电电子学、电信技术 • 上一篇下一篇

基于动态多频谱感知的认知无线网络信道接入策略

肖楠，梁俊，刘玉磊

（空军工程大学信息与导航学院，西安 710077）

收稿日期:2015-06-29 出版日期:2016-05-28 发布日期:2016-05-28
基金资助:
国家自然科学基金资助项目（61501496），陕西省自然科学基金项目（2012JM8004），航空科学基金项目（2013ZC15008）

Channel Access Strategy Based on Dynamic MultiSpectrum Sensing in Cognitive Radio Networks

XIAO Nan,LIANG Jun,LIU Yulei

(Information and Navigation College, Air Force Engineering University, Xi'an 710077, China)

Received:2015-06-29 Online:2016-05-28 Published:2016-05-28

摘要/Abstract

摘要： 摘要：针对固定频谱感知信道接入机制授权信道分配效率低的问题，提出一种多用户场景下基于动态多频谱感知的认知无线网络信道接入策略.该策略根据认知用户接入请求等级与空闲频谱发现概率为认知用户动态分配感知信道数量，首先分析了认知用户的最佳感知频谱分配数量，在此基础上通过建立认知用户信道接入模型和授权信道可用度更新机制，设计了一种动态感知频谱分配策略，并采用短视策略对网络吞吐量进行了分析.仿真结果表明，所提信道接入策略要比现有认知无线网络信道接入策略提高了网络吞吐量和认知用户接入的公平性，降低了认知用户的平均接入时延.

关键词: 认知无线电, 动态分配, 频谱感知, 信道接入, 吞吐量

Abstract: Abstract： Aimed at the low allocation efficiency of primary spectrum of channel access strategies based on fixed spectrumsensing, a novel channel access strategy based on dynamic multispectrum sensing was proposed for cognitive radio network. The cognitive radio base station could adjust the number of sensing channels allocated to secondary users according to their access request priority and discover the probability of idle spectrum in a single time slot. The optimized number of sensing spectrums allocated to secondary user was analyzed. As the proposed strategy is formulated as a channel selection problem coupled with a channel assignment problem, the myopic sensing policy was subsequently investigated and a Markov chainbased dynamic channel assignment algorithm was proposed. The results of simulation indicate that the proposed channel access strategy has achieved significant performance improvements in network throughput compared to the existing strategies, and the average channel access delay of secondary users has been declined while the fairness of channel access is better.

Key words: Key words： cognitive radio, dynamic allocation, spectrum sensing, channel access, throughtput

中图分类号:

TN 915

肖楠，梁俊，刘玉磊. 基于动态多频谱感知的认知无线网络信道接入策略[J]. 上海交通大学学报（自然版）, 2016, 50(05): 788-795.

XIAO Nan,LIANG Jun,LIU Yulei. Channel Access Strategy Based on Dynamic MultiSpectrum Sensing in Cognitive Radio Networks[J]. Journal of Shanghai Jiaotong University, 2016, 50(05): 788-795.

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基于动态多频谱感知的认知无线网络信道接入策略

Channel Access Strategy Based on Dynamic MultiSpectrum Sensing in Cognitive Radio Networks

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