Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (8): 26-31.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Cognitive Radio Spectrum Allocation Algorithm Based on Licensed User Activities

Wang Yao  Zhang Zhong-zhao  Ma Lin  Chen Jia-mei   

  1. Communication Research Center,Harbin Institute of Technology,Harbin 150080,Heilongjiang,China
  • Received:2012-03-09 Revised:2012-04-18 Online:2012-08-25 Published:2012-07-01
  • Contact: 张中兆(1951-) ，男，博士，教授，主要从事数据通信、移动通信和卫星通信研究． E-mail:zzzhang@hit.edu.cn E-mail:wangyaowh2005@ hit.edu.cn
  • About author:王垚(1984-) ，男，博士生，主要从事认知无线电研究．
  • Supported by:

    国家自然科学基金委员会－ 中国民用航空局联合研究基金资助项目( 61071104 /61101122) ; 通信网信息传输与分发技术重点实验室开放课题( ITD-U12004 /K1260010)

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Abstract:

By taking into consideration the influence of the handoff probability of licensed user's working states on the spectrum allocation in cognitive radio ( CR) networks,this paper proposes a new cognitive radio spectrum allocation algorithm. In the algorithm,based on the definition of income expectation,two new utility functions are presented from the perspective of probability,which respectively reflect the total average channel income expectation and the fairness of the income expectation of cognitive systems. Then,some specific steps of the proposed algorithm are provided. Simulation results show that,as compared with the traditional channel allocation algorithms,the proposed algorithm has an obvious advantage in terms of the total spectrum utilization in the cognitive system; and that it displays excellent system fairness when the licensed user’s working states frequently change,which means that the proposed algorithm is of more practical significance.

Key words: cognitive radio, resource allocation, graph theory, fairness

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