Time synchronization algorithm based on hierarchical structure in wireless sensor network
Ming Hu · Journal of Computer Applications · 2012
Time synchronization is one of the key technologies for wireless sensor networks,and it plays an irreplaceable role for the work and development of the entire wireless sensor network.This paper proposed an improved Timing-sync Protocol for Sensor Networks(TPSN) algorithm based on hierarchy.This algorithm took level-broadcast in phase of level establishment,and a combined active and inactive two-way synchronization algorithm was used in phase of time synchronization,obtaining a relatively small cost of packet and system maintenance.This improved algorithm carried out time-frequency offset correction,and ensured the accuracy of the node.The improved TPSN algorithm not only enhances the accuracy of synchronization,but also saves the energy consumption for the network.