| 认知无线电网络中基于包调度算法的主动频谱切换 |
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| 引用本文： | 马彬,廖晓峰,谢显中.认知无线电网络中基于包调度算法的主动频谱切换[J].电子学报,2013,41(8):1628-1633. |
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| 作者姓名： | 马彬 廖晓峰 谢显中 |
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| 作者单位： | 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 |
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| 基金项目： | 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 |
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| 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.
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| 关 键 词： | 认知无线电网络 频谱切换 包调度 |
| 收稿时间： | 2012-05-10 |
Proactive Spectrum Handover Based on Packet Scheduling Algorithm in Cognitive Radio Networks |
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| MA Bin
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LIAO Xiao-feng
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XIE Xian-zhong.Proactive Spectrum Handover Based on Packet Scheduling Algorithm in Cognitive Radio Networks[J].Acta Electronica Sinica,2013,41(8):1628-1633. |
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| Authors: | MA Bin LIAO Xiao-feng XIE Xian-zhong |
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| Affiliation: | 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 |
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| 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. |
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| Keywords: | cognitive radio networks spectrum handover packet scheduling |
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