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DOI:
Journal of Software:2007.18(5):1080-1091

一种适用于无线传感器网络的功率控制MAC协议
李方敏,徐文君,高超
(武汉理工大学,信息工程学院,湖北,武汉,430070;Department of Computer Science,University of Vaasa,Vaasa,Finland)
A Power Control MAC Protocol for Wireless Sensor Networks
LI Fang-Min,XU Wen-Jun,GAO Chao
()
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Received:August 14, 2006    Revised:November 16, 2006
> 中文摘要: 功率控制技术通过减少节点的发射功率来降低能耗,但节点间不对称的发射功率会增加网络的冲突概率并降低吞吐量.根据实际环境中的节点部署情况,引入了基于Pareto分布的系统模型.研究了传感器网络中功率控制技术在节省能量方面的性能,提出了一种基于SMAC(sensor-MAC)可适用于无线传感器网络的功率控制MAC(media access control)协议.此协议使用功率控制调度算法选择最优相邻节点,使网络中节点的拓扑连接得到优化,在保证网络连通性的同时,降低通信的冲突率,扩大网络的吞吐量.信息的传递以最优功率发射,并使通信节点具有反作用冲突节点的能力,从而在降低网络能耗的同时保证了节点间通信的公平性.实验仿真结果显示,与现有的几种重要方案相比,新的功率控制MAC协议使网络具有了更大的有效吞吐量及更长的生存时间.
Abstract:Power control scheme is used to reduce energy consumption,but asymmetric transmit powers is the problem which can result in increased collisions and degraded throughput in the scheme. A system model following pareto distribution according to a real network situation is proposed. The performance of the power control scheme in saving energy for wireless sensor networks is studied in this paper. A power control scheme based on SMAC(sensor-MAC) for wireless sensor networks is proposed and evaluated. In the new scheme,the optimum neighbor nodes are selected by a scheduling algorithm which can improve the network topology,reduce the collisions,increase goodput,and confirm the network connectivity. The message is transmitted with the optimum power. Furthermore,the protocol provides a fair share of the medium to low power and high power nodes by the reactive mechanism. The experimental results demonstrate that the new power control MAC(media access control) protocol provides longer lifetime and higher goodput than the current important protocols.
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基金项目:Supported by the Program for New Century Excellent Talents in University of China under Grant No.NCET-05-0657 (新世纪优秀人才支持计划); the Foundation for Distinguished Young Scientists of Hubei Province of China under Grant No.2006ABB028 (湖北省青年杰出人才基金) Supported by the Program for New Century Excellent Talents in University of China under Grant No.NCET-05-0657 (新世纪优秀人才支持计划); the Foundation for Distinguished Young Scientists of Hubei Province of China under Grant No.2006ABB028 (湖北省青年杰出人才基金)
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李方敏,徐文君,高超.一种适用于无线传感器网络的功率控制MAC协议.软件学报,2007,18(5):1080-1091

LI Fang-Min,XU Wen-Jun,GAO Chao.A Power Control MAC Protocol for Wireless Sensor Networks.Journal of Software,2007,18(5):1080-1091