| 一种适用于节点功率非对称WSN的改进S-MAC协议 |
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| 引用本文： | 林金朝,贾浩,李云,任智,刘占军.一种适用于节点功率非对称WSN的改进S-MAC协议[J].重庆邮电学院学报(自然科学版),2009(1). |
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| 作者姓名： | 林金朝 贾浩 李云 任智 刘占军 |
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| 作者单位： | 重庆邮电大学移动通信技术重点实验室;重庆大学; |
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| 基金项目： | 国家自然科学基金项目(60702055);;教育部新世纪优秀人才支持计划(NCET);;重庆市科委科技攻关项目(CSTC,2008AB2023) |
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| 摘 要： | 针对节点功率非对称的无线传感器网络中的隐终端问题,提出在RTS/CTS机制基础上增加广播Bandwidth Reservation(BRES)消息的改进协议。在改进协议中,通信节点的邻居节点根据侦听到的CTS消息动态广播BRES消息,使得与通信节点连接非对称的高功率节点在接收到BRES消息后推迟自身发送任务,从而避免了隐终端问题。仿真结果表明:相比S-MAC协议,改进协议减少了低功率节点的数据冲突并降低了其到目的节点的端到端延迟,提高了低功率节点和网络的吞吐量。
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| 关 键 词： | 无线传感器网络 媒体接入控制 广播信道预留消息 隐终端 |
An improved S-MAC protocol for power asymmetric WSN network |
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| LIN Jin-zhao,JIA Hao,LI Yun,REN Zhi,LIU Zhan-jun.An improved S-MAC protocol for power asymmetric WSN network[J].Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition),2009(1). |
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| Authors: | LIN Jin-zhao JIA Hao LI Yun REN Zhi LIU Zhan-jun |
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| Institution: | 1.Key Laboratory of Mobile Communications;Chongqing University of Posts and Telecommunications;Chongqing 400065;P.R.China;2.Chongqing University;Chongqing 400044;P.R.China |
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| Abstract: | The communications are interrupted by the hidden terminals in the traditional MAC protocols when the nodes' power is asymmetric in WSN networks.In order to solve this problem,an improved protocol was proposed by increasing the broadcasting bandwidth reservation(BRES)message based on RTS/CTS.In this improved protocol,the neighborhood nodes will broadcast bandwidth reservation message intelligently after overhearing CTS.After receiving BRES,the high power nodes will inhibit their own transmissions for the dur... |
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