择优同步分布式时钟同步系统设计  

Design of Distributed Clock Synchronization System by Selecting Execllent Network Nodes to Synchronize with

作　　者：康立毅 陈晓[1] 王劲林[1,2] KANG Liyi;CHEN Xiao;WANG Jinlin(National Network New Media Engineering Research Center,Institute of Acoustic,Chinese Academy of Science,Beijing,100190,China;University of Chinese Academy of Science,Beijing,100049,China)

机构地区：[1]中国科学院声学研究所国家网络新媒体工程技术研究中心,北京100190 [2]中国科学院大学,北京100049

出　　处：《网络新媒体技术》2019年第1期53-57,共5页Network New Media Technology

基　　金：国家科技重大专项"新一代宽带无线移动通信网";课题"5G与信息中心网络(ICN)融合技术研发"(编号:2017ZX03001019)

摘　　要：分布式时钟同步技术在信息通信技术中应用广泛。本文设计了一种择优同步分布式时钟同步系统,通过时钟性能比较模块,比较网络节点与其邻居节点时钟性能优劣,存储和维护时钟性能优劣表;通过择优同步模块,网络节点根据时钟性能优劣表,择优与其邻居节点进行时钟同步。网络节点择优与其邻居节点保持时钟同步,并且在计算相邻网络节点之间的时钟偏差时通过采用支持打硬件时间戳方式的PTP协议来实现,本系统对分布式时钟同步技术改善具有重要意义。The technology of Distributed clock synchronization is widely used in information technology and communication technology.This paper designs a kind of distributed clock synchronization system in which the network nodes select excellent neighbor nodes to synchronize with.The clock performance comparison module compares the clock performance of the network node and its neighbor nodes and stores and maintains the clock performance table.Through the preferred synchronization module,the network nodes select excellent neighbor nodes to synchronize with according to the clock performance table.This system is greatly critical to modify distributed clock synchronization for the networks nodes select excellent neighbor nodes to synchronize with and the clock skew between neighbor network nodes is calculated by using PTP protocol that supports adding hardware timestamp to the network package.

关 键 词：时钟同步 择优同步 同步精度 分布式 

分 类 号：TN929.5[电子电信—通信与信息系统]