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认知环境中一种改进的CSMA接入方法

An Improved CSMA Access Control Method for Cognitive Environment
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摘要 认知无线电技术通过感知无线环境寻求可用频谱资源,进行智能的、动态的频谱接入,打破了传统无线通信系统固定划分频谱资源的方式,从而提高了频谱资源的利用率.结合认知无线电的特点和802.11 CSMA/CA,改进了RTS-CTS帧、虚拟载波侦听、回退机制,提出了一种适合认知环境的改进的CSMA接入方法,并分析了此接入方法的性能. Cognitive radio technology is an intelligent wireless radio technology which is able to sense the wireless environment and identify available spectrum resources.It can access intelligently and dynamically thus enhancing the utilization of spectrum resources.In this paper,based on 802.11 CSMA/CA and considering the characteristics of the cognitive radio,we propose an improved CSMA access control method to improve the RTS-CTS frame,the virtual carrier sense,the backoff mechanism,and then we analysis its performance.
作者 彭伟夫 江天明
机构地区 四川省电力公司通信自动化中心 中国移动研究院
出处 《四川师范大学学报（自然科学版）》 CAS CSCD 北大核心 2011年第5期771-774,共4页 Journal of Sichuan Normal University（Natural Science）
基金 四川省科技支撑计划基金(2009GZ0033)资助项目
关键词 认知无线电 接入方法 CSMA cognitive radio access control method CSMA
分类号 TN929.5 [电子电信—通信与信息系统]
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参考文献10

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四川师范大学学报（自然科学版）
2011年 第5期

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