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基于排队论的认知无线网络从用户机会接入性能分析

发表时间:2014-10-31  浏览量:1608  下载量:594
全部作者: 张雷,胡静,吴名,孙大飞,宋铁成
作者单位: 东南大学移动通信国家重点实验室
摘 要: 对认知无线网络中从用户机会式地接入主用户空闲频谱前的排队等待时间进行分析,可以帮助提高从用户接入频谱的机会,进而有效地提高频谱效率。这里即通过对主从2种用户在认知网络中的活动情况联合考虑,建立马尔可夫排队模型,并利用矩阵几何解的理论,得到在稳态下从用户接入频谱前的平均等待时间。最后的数值结果不仅进一步证实了理论分析的合理性,而且为系统满足从用户频谱接入前的时延需求提供了参考。
关 键 词: 无线通信技术;认知无线网络;排队论;性能分析;机会性频谱接入
Title: Queuing-based performance analysis for opportunistic spectrum access of the secondary users in cognitive radio networks
Author: ZHANG Lei, HU Jing, WU Ming, SUN Dafei, SONG Tiecheng
Organization: National Mobile Communications Research Laboratory, Southeast University
Abstract: In cognitive radio networks, analyzing the waiting time before opportunistically accessing to the idle spectrum of primary users can help to improve the spectrum access probability for the secondary users, and thus, improve the spectrum efficiency. Accordingly, this paper proposes a Markov queuing model by considering the activity of both primary and secondary users in the cognitive radio network, and obtains the average waiting time of the secondary user in the steady state before access to the spectrum through the matrix-geometric solution theory. The final number results not only confirm the rationality of the analysis but also provide a reference to meet the secondary user’s waiting delay before using the spectrum for the system.
Key words: wireless communication technology; cognitive radio network; queuing theory; performance analysis; opportunistic spectrum access
发表期数: 2014年10月第20期
引用格式: 张雷,胡静,吴名,等. 基于排队论的认知无线网络从用户机会接入性能分析[J]. 中国科技论文在线精品论文,2014,7(20):2052-2057.
 
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