A time synchronization algorithm for wireless sensor network of linear structure
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摘要: 针对煤矿井下液压支架模糊控制监测系统网络拓扑，提出了一种适用于线型结构无线传感器网络的时间同步算法。该算法同步过程分为簇间同步和簇内同步，簇间同步采用双向同步机制修正时间偏移的方法减少同步误差，簇内同步通过最小平方线性拟合方法构造逻辑时钟函数，从而得到簇内任一节点与簇首节点的频偏和相偏估计值，以提高同步精度。仿真结果表明，该算法能有效减少时间同步误差和能量消耗。Abstract: In view of network topology of fuzzy control and monitoring system of underground hydraulic support, the paper proposed a time synchronization algorithm adapted to wireless sensor network of linear structure which includes adjacent cluster synchronization and internal cluster synchronization. The adjacent cluster synchronization adopts bisynchronous mechanism which corrects time offset to decrease synchronization errors. The internal cluster synchronization obtains frequency and phase offset between any node and head node in the cluster by constructing logic clock function through least square linear fitting method to improve synchronization precision. The simulation results show that the algorithm can effectively reduce synchronization errors and energy consumption.
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