Optimization And Realization Of Flooding Time Synchronization Protocol In Wireless Sensor Network

Wireless sensor networks(WSN)has great potential applications on the environment,military,medical and many other fields.And as a supporting technology of wireless sensor network,time synchronization technology has become the focus of researchers in recent years.This paper introduces the technical overview and performance index of three time synchronization and mainly focuses on the analysis and comparison of the flooding time synchronization protocol(FTSP).It focuses on FTSP,integrates the core idea of FTSP in the traditional timing synchronization protocol for sensor networks(TPSN),In view of the disadvantage of TPSN,we present a new protocol that aims at reducing the energy consumption of the synchronization process and realizes a dynamic Network.The algorithm broadcasts reference message to select some nodes in specific area.The receiver calculate offset of every selected node,and then calculate the average of offset to compensate for clock skew.At the same time,we add time-filter process to ensure the security of the algorithm for time synchronization.The experiment results show that our algorithm is efficient in both saving energy consumption and dynamic network,and it can effectively resist attacks.In view of the disadvantage of the FTSP in energy and security,this paper gives the improvement scheme of energy consumption and linear regression algorithm,and the energy consumption is reduced by using node hierarchical strategy and directional propagation method.And this paper adds the modle of idle time on energy consumption,and analyzes its effect.The regression algorithm of time filtering interval is added to reduce the influence of abnormal data points on the regression curve,which ensures the security of time synchronization algorithm.This paper simulates and testes the energy efficiency and precision of the improved algorithm on simulation software NS2 and hardware platform CC2530.