认知无线电网络基于干扰概率的频谱接入策略  

Spectrum Access Scheme Based on Interference Probability in Cognitive Radio Networks

作　　者：李瑞芳[1] 刘泉[1] 

机构地区：[1]武汉理工大学信息工程学院,湖北武汉430070

出　　处：《武汉理工大学学报（信息与管理工程版）》2013年第6期804-807,832,共5页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：国家自然科学基金资助项目(51175389)

摘　　要：频谱接入策略是认知用户在不影响授权用户的情况下,高效使用空闲授权频谱的关键。提出了基于授权用户干扰概率的频谱接入策略,有业务需要传输时,认知用户感知信道,通过计算不同属性的授权频谱剩余空闲时间,确定可传输的业务包数量,在提高频谱利用率的同时,降低对授权用户的干扰。理论分析与实验验证表明,所提出的策略能有效减小对授权用户的干扰概率,空闲频谱利用率能稳定地保持在较高水平。Dynamic spectrum access( DSA) is an important design aspect for cognitive radio networks.Secondary User( SU) needs to utilize the idle spectrum efficiently without disturbing Primary User( PU).Based on interference probability to PU,a novel spectrum access scheme was proposed.When messages need to be transmitted,the SU senses the license spectrums,estimates the number of transmission packet in the remaining idle time of the spectrums with different attributes.The theoretical and experimental results show that the proposed scheme was able to effectively reduce the interference probability to Primary User.At the same time,the idle spectrum utilization could remain steady at high level.

关 键 词：认知无线网络 干扰概率 频谱接入策略 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]