北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2008, Vol. 31 ›› Issue (2): 128-131.doi: 10.13190/jbupt.200802.128.zhangy

• 研究报告 • 上一篇    下一篇

基于可变间隔的认知无线电频谱检测机制

张 宇,冯春燕,郭彩丽   

  1. 北京邮电大学 通信网络综合技术研究所,北京 100876
  • 收稿日期:2007-06-24 修回日期:1900-01-01 出版日期:2008-04-28 发布日期:2008-04-28
  • 通讯作者: 张 宇

A Flexible Sensing Period Mechanism of Spectrum Sensing in Cognitive Radio Networks

ZHANG Yu, FENG Chun-yan, GUO Cai-li   

  1. Institute of Communication Network Integrated Technology, Beijing University of Posts and Telecommunications, Beijing 100876,China
  • Received:2007-06-24 Revised:1900-01-01 Online:2008-04-28 Published:2008-04-28
  • Contact: ZHANG Yu

摘要:

为灵活控制认知无线电网络中媒体访问控制(MAC)层频谱检测的成本,提出了一种基于可变检测间隔(FSP)的频谱检测机制,该机制充分利用授权用户状态分布的统计信息,通过引入控制因子,使认知用户可以适时改变检测间隔,在检测所造成的损失时间与检测次数之间折衷。仿真分析表明,FSP检测机制比传统的固定间隔检测更有效地控制检测成本。

关键词: 认知无线电, 频谱检测, 更新报酬定理, 剩余寿命

Abstract:

A new spectrum sensing mechanism based on flexible sensing period( FSP) is proposed to control the cost of the sensing in the medium access control(MAC) layer of cognitive radio networks. The cognitive radio (CR) users can make a balance between the unexpected time and the sensing count by utilizing the statistic information of licence users and a “period control factor”, that will reduce the cost of sensing. Simulation results show that FSP can give a better performance than the typical fixed sensing period mechanism.

Key words: cognitive radio, spectrum sensing, renewal rewards theory, residual life

中图分类号: