无线传感网络低能耗时间同步的研究

Computer Engineering and Applications(2012)

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Abstract
低耗能是无线传感器网络时间同步算法的重要技术要求之一.为了降低同步过程中的能量消耗,提出了一种低能耗LECTS(Low Energy Consumption Time Synchronization)算法.该算法基于TPSN算法的基本思想,在两个阶段同时进行改进来降低能量消耗.在层次发现阶段利用节点之间的距离来限制部分节点广播,降低数据包的发送;在同步阶段结合单向广播和双向报文交换同步机制,也同样降低数据包的发送.通过仿真结果表明,与TPSN算法以及其改进算法STSP算法相比,算法能显著地降低无线传感器网络时间同步的能量消耗,且节点密度越大,节能越显著.
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Key words
limited part of the broadcast,pair-wire time synchronization,reference broadcast synchronization,time synchronization,low energy consumption,wireless sensor networks
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