Improvement Based on the Hierarchical Levels Structure of the TPSN Algorithm
Ming Hu · Chuangan jishu xuebao · 2012
Time synchronization is an important support technology of WSN(Wireless Sensor Network),and plays an irreplaceable role in the development of WSN.Improved algorithm of TPSN that is based on the hierarchical levels structure is proposed:In the level discovery phase,using the distance between nodes limits part of nodes broadcast,to reduce the packets send.Meanwhile,in the synchronization phase,combining unidirectional reference broadcast and pair-wise mechanism,so that only one node in broadcast domain needs time synchronization,and also greatly reduces the messages;Finally,this algorithm carrys out time-frequency correction,ensuring the accuracy of synchronization for the node.Improved Algorithm of TPSN combining these ideas does not only ensure accuracy of synchronization,but also save energy consumption for WSN.