Low Energy Consumption and High-Precision Time Synchronization Algorithm Based on Improved TPSN in Wireless Sensor Networks

Targeting transmission delay error and energy consumption when TPSN exchanges messages between adjacent nodes, an improved time synchronization algorithm is proposed for wireless sensor networks(WSNs). In the hierarchical discovery and establishment phase, hierarchical broadcast messages are clustered and the LEACH algorithm is used to obtain the optimal cluster-head node. In the synchronization phase, Bayesian estimation is used to implement the whole-network node synchronization. Simulation experiment shows that, compared with the TPSN algorithm, this method improves time accuracy and reduces energy consumption.