多层动态分簇的WSN时间同步算法

发布时间：2018-03-28 20:59

本文选题：无线传感器网络　切入点：时间同步　出处：《传感技术学报》2017年07期

【摘要】：无线传感器网络受多跳传输延迟和节点中的晶振准确度的影响,造成时间同步误差较大。为了减小同步误差,传统解决方法提高了同步算法的频率,这使得算法面临两个问题:(1)通信能耗较高;(2)精度与能耗之间的不平衡。针对以上问题,结合单向广播机制和双向成对机制,提出一种多层动态分簇的无线传感器网络时间同步算法。采用节点分层策略减少了同步通信开销;采用同步误差补偿机制降低了算法同步误差的影响,使用时钟补偿机制减少了传感器节点运行的累积误差。实验测试表明:在保证精度的前提下,本算法降低了同步次数,减少了同步通信开销,从而延长了网络的生命周期。
[Abstract]:The wireless sensor network is affected by the multi-hop transmission delay and the crystal oscillator accuracy in the node, which results in a large time synchronization error. In order to reduce the synchronization error, the traditional solution improves the frequency of the synchronization algorithm. This makes the algorithm face two problems: 1) the communication energy consumption is high and the energy consumption is not equal. In view of the above problems, the unidirectional broadcasting mechanism and the bidirectional pairing mechanism are combined. A multi-layer dynamic clustering time synchronization algorithm for wireless sensor networks is proposed. The node stratification strategy is used to reduce the synchronous communication overhead, and the synchronization error compensation mechanism is used to reduce the influence of synchronization error. The clock compensation mechanism is used to reduce the cumulative error of the sensor node operation. The experimental results show that the proposed algorithm reduces the synchronization times and the synchronous communication overhead and prolongs the lifetime of the network under the premise of ensuring the accuracy.
【作者单位】：兰州交通大学电子与信息工程学院;
【基金】：甘肃省科技计划项目(144NKCA040) 国家自然科学基金项目(61163009)
【分类号】：TN929.5;TP212.9

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