频率互异多相位粒度线性脉冲耦合WSN时间同步模型  

Time Synchronization Model of Multi-Phase Granular Linear-Pulse Coupling with Different Frequency in Wireless Sensor Network

作　　者：洪金祥 崔丽珍[1] 曹坚 安竹林[2] HONG Jinxiang;CUI Lizhen;CAO Jian;AN Zhulin(School of Information Engineering,Inner Mongolia University of Science&Technology,Baotou Inner Mongolia 014010,China;Institute of Computer Technology,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]内蒙古科技大学信息工程学院,内蒙古包头014010 [2]中国科学院计算技术研究所,北京100190

出　　处：《传感技术学报》2023年第12期1965-1973,共9页Chinese Journal of Sensors and Actuators

基　　金：内蒙古自治区科技计划项目(2019GG328,2022YFSH0051);内蒙古自然科学基金项目(2020MS06027);国家自然科学基金青年基金项目(61902394)。

摘　　要：针对无线传感器网络在运行过程中,传感器节点晶振频率的一致性难以保证而影响时间同步的问题,提出一种基于频率互异的多相位粒度线性脉冲耦合无线传感器时间同步模型。首先基于萤火虫同步机制,在无线传感器网络中采用去中心化的脉冲激励耦合方式,考虑每一个节点可能存在频率的差异,构建出表征不同振荡频率的动态方程。其次对两个振荡器和多振荡器系统进行数学分析,跟踪同步演进过程得出同步条件。最后通过仿真实验,验证了所提模型在节点频率不一致的无线传感器网络中能够实现稳定的同步状态,并且较未考虑频率变化的线性脉冲耦合振荡器同步模型具有更快的同步收敛速度。In order to solve the problem that the consistency of crystal frequencies of sensor nodes is difficult to be guaranteed during the operation of wireless sensor network is proposed,a time synchronization model of multiphase granular linearpulse coupling with different frequency in wireless sensor network.Firstly,based on the firefly synchronization mechanism,the decentralized pulse excitation coupling mode is adopted in the wireless sensor network,the possible frequency difference of each node is considered,and the dynamic equations representing different oscillation frequencies are constructed.Then mathematical analysis of two oscillators and multi oscillators is carried out,and the synchronization condition is obtained by tracking the synchronous evolution process.Finally,through simulation experiments,it is verified that the model proposed can achieve a stable synchronization state in wireless sensor networks with inconsistent node frequencies,and has a faster synchronization convergence rate.

关 键 词：无线传感器网络 时间同步 线性脉冲耦合 频率互异 多相位粒度 

分 类 号：TN92[电子电信—通信与信息系统]