无线传感器网络中的萤火虫时间同步改进模型  

Optimized Firefly Time Synchronization Model for Wireless Sensor Network

作　　者：崔丽珍[1] 曹坚 安竹林[2] 李丹阳 王巧利 CUI Li-zhen;CAO Jian;AN Zhu-lin;LI Dan-yang;WANG Qiao-li(School of Information Engineering,Inner Mongolia University of Science&Technology,Baotou 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：《小型微型计算机系统》2020年第7期1488-1493,共6页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(61761038)资助。

摘　　要：针对大规模的无线传感器网络中,低成本传感器节点的计算能力较低,时间同步过程中存在随着跳距的增加出现同步误差积累的现象,本文基于萤火虫同步技术提出了一种具有抑制耦合的线性脉冲耦合振荡器同步模型.使用线性动态函数描述振荡器的状态变化,降低运算复杂度,引入负耦合因子建立新型的脉冲耦合方式,有效缩短同步过程,对两个及多振荡器系统分析同步过程得出同步条件,构建完整的有限状态自动机证明模型同步性.通过实验仿真,分析耦合参数对同步速度的影响,系统的稳定性以及网络同步周期,结果表明该模型有效提升了系统同步速度,取得较好的同步效果.Aiming at the problem that synchronization error accumulation occurs with increasing hop distance in time synchronization and Low-cost sensor nodes have lower computing pow er in large-scale wireless sensor networks,this paper proposes a synchronous model of linear pulse coupled oscillator with inhibitory coupling based on firefly synchronization technology.Description of the oscillator by using a linear function of the dynamic state changes to reduce computational complexity.Introducing negative coupling strength,construct a new phase evolution method to effectively shorten the synchronization process.Analysis of two multi-oscillator and synchronization system derived synchronization condition,building a complete finite state automaton prove synchronization model.The effects of coupling parameters on synchronization speed,system stability and network synchronization period are analyzed by experimental simulation.The results show that the model achieves better synchronization and faster synchronization speed.

关 键 词：无线传感器网络 时间同步 萤火虫同步 脉冲耦合 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]