电子学报 ›› 2013, Vol. 41 ›› Issue (8): 1628-1633.DOI: 10.3969/j.issn.0372-2112.2013.08.028

• 科研通信 • 上一篇    下一篇

认知无线电网络中基于包调度算法的主动频谱切换

马彬1,2, 廖晓峰1, 谢显中2   

  1. 1. 重庆大学计算机学院 输配电装备及系统安全与新技术国家重点实验室, 重庆 400044;
    2. 重庆邮电大学计算机学院 重庆市计算机网络与通信技术重点实验室, 重庆 400065
  • 收稿日期:2012-05-10 修回日期:2013-05-10 出版日期:2013-08-25
  • 作者简介:马 彬 男,1978年出生,四川人.博士生,重庆邮电大学副教授,主要研究方向为认知无线电网络、异构无线网络、不确定智能算法等. E-mail:mab_cqupt@sina.com 廖晓峰 男,1964年出生,四川人.重庆大学教授,博士生导师,长江学者.主要研究方向为人工神经网络、混沌和无线网络等.
  • 基金资助:
    国家自然科学基金(No.60973114,No.61170249,No.61271259); 重庆市教委科学技术研究(No.KJ120529,No.KJ130536); 重庆市计算机网络与通信技术重点实验室基金(No.CY-CNCL-2010-02)

Proactive Spectrum Handover Based on Packet Scheduling Algorithm in Cognitive Radio Networks

MA Bin1,2, LIAO Xiao-feng1, XIE Xian-zhong2   

  1. 1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Computer Science, Chongqing University, Chongqing 400044, China;
    2. Chongqing Key Laboratory of Computer Network and Communication Technology of China, College of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • Received:2012-05-10 Revised:2013-05-10 Online:2013-08-25 Published:2013-08-25

摘要: 认知无线电网络中,主用户出现在自己的授权频段,但被次用户占用,此时次用户进行频谱切换.主动频谱切换机制是一种可以提高网络的带宽利用率,同时降低丢包率的方法.基于一个有效的包调度算法,提出一个主动频谱切换机制,以期减少频谱切换发生时的不可用信道.该包调度算法有效地集成了两个算法:频谱空洞填充算法和包迁移算法,来减少丢包率和带宽碎片.实验仿真结果验证了该主动频谱切换机制的有效性.

关键词: 认知无线电网络, 频谱切换, 包调度

Abstract: In cognitive radio networks,spectrum handover occurs when a secondary user changes frequency due to the appearance of a primary user.Proactive spectrum handover may result in aggraded bandwidth utilization performance and degraded packet loss probability.Here,we develop a proactive spectrum handover mechanism by using an efficient packet scheduling algorithm,to reduce unusable channel.It effectively integrates two algorithms:spectrum hole filling algorithm and packet migration algorithm,to minimize packet loss probability and reduce the bandwidth fragment.The efficiency of the mechanism is validated by simulation results.

Key words: cognitive radio networks, spectrum handover, packet scheduling

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