北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2016, Vol. 39 ›› Issue (4): 13-18.doi: 10.13190/j.jbupt.2016.04.003

• 论文 • 上一篇    下一篇

认知无线网络中非理想频谱检测的切换

马彬, 包小敏, 谢显中   

  1. 重庆邮电大学 移动通信技术重点实验室, 重庆 400065
  • 收稿日期:2016-01-21 出版日期:2016-08-28 发布日期:2016-08-28
  • 作者简介:马彬(1978-),男,副教授;包小敏(1990-),女,硕士生,E-mail:mab_cqupt@sina.com.
  • 基金资助:
    国家自然科学基金项目(61271259,61301123,61471076);重庆市基础与前沿研究计划项目(cstc2015jcyjA40047);重庆邮电大学博士启动基金项目(A2014-10,A2015-16)

The Handoff Study of Imperfect Sensing in Cognitive Radio Network

MA Bin, BAO Xiao-min, XIE Xian-zhong   

  1. Key Laboratory of Mobile Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • Received:2016-01-21 Online:2016-08-28 Published:2016-08-28

摘要: 针对在非理想频谱检测情况下频谱切换不准确的问题,利用抢占优先恢复M/G/1排队网络模型,提出一个具有错误数据重传机制的频谱切换算法,并通过传输时延和扩展数据传输时间2个参数分析了算法的性能. 通过实验仿真,讨论了漏检概率、扩展数据传输时间和用户流量负载的关系,验证了该算法的有效性.

关键词: 认知无线电, 频谱切换, 非理想检测, 排队论

Abstract: To guarantee the quality of service of licensed users, the unlicensed users must vacate the occupied channel by spectrum handoff if the licensed users appear in the cognitive radio. However, the spectrum sensing with false alarm and missed detection may lead to more inaccuracy problems when the unlicensed users perform spectrum handoff. To solve the problems mentioned here, the authors utilize the preemption resume priority(PRP) M/G/1 queuing network model to propose a spectrum handoff algorithm with error data retransmission mechanism and analyze its performance by transmission latency and extended data delivery time. In addition, the authors discussed the relationship between false alarm probability, extended data delivery time and user traffic load, and verified the effectiveness of the proposed algorithm.

Key words: cognitive radio, spectrum handoff, imperfect sensing, queuing theory

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