Cluster Time Synchronization Algorithm Based on ZigBee Wireless Sensor Network
In wireless sensor networks,time synchronization technology has a key role in channel allocation,data send-ing and receiving,and dormant scheduling.Among the existing time synchronization algorithms,some of them do not have high synchronization accuracy,and some of them require frequent data exchanges resulting in excessive power consump-tion.Therefore,it is imperative to design an algorithm that can simultaneously meet the requirements of both high precision and low power consumption.The algorithm proposed in this paper constructs a clustering function by changing the network topology,elects the cluster head and performs clustering.In the new network topology,the synchronization accuracy is en-sured by frequency offset compensation between the coordinator and the cluster head,and the time synchronization is car-ried out by eliminating the time delay through three-time communication between the cluster head and the member nodes,so as to realize the time synchronization of the whole network.Simulation results show that the whole network can have high synchronization accuracy even at lower power consumption.
NETL
NSTL
万方数据
