无线传感器网络时间同步CS-TPSN算法研究与仿真

Research and Simulation of Time Synchronization CS-TPSN Algorithm in Wireless Sensor Networks

无线传感器网络TPSN(Timing-Sync Protocol for Sensor Network)算法采用中心节点与子节点的双向通信,并通过交换时间信息和计算偏差值,实现无线传感器网络时间同步,有较高的时钟同步精度。但当系统中传感器密度较大时,节点同步跳数将明显增加,在影响同步精度的同时,增加了节点能量消耗。该研究提出了CS-TPSN算法,通过在节点层间进行拓扑结构改进,减少报文数量,优化层内和层间设计,降低算法开销,实现了基于OPNET的建模和仿真分析。

In wireless sensor networks,TPSN algorithm uses the two-way communication between the central node and the child nodes to realize the time synchronization of wireless Sensor Network by exchanging time information and calculating deviation value,which has high clock synchronization accuracy.However,when the sensor density in the system is large,the number of nodes synchronization hops will increase significantly,which will affect the synchronization accuracy and increase the energy consumption of nodes.In this paper,the CS-TPSN algorithm is proposed to improve the topology between nodes and to reduce the number of messages.Through the optimization design within and between layers,the algorithm overhead is reduced,and the modeling and simulation analysis based on OPNET are realized.