基于IEEE1588的高精度时间同步技术分析  

Analysis on High-precision Time Synchronization Technique Based on IEEE1588

作　　者：郑翊[1] ZHENG Yi(China Academy of Electronics and Information Technology,Beijing 100041,China)

机构地区：[1]中国电子科学研究院,北京100041

出　　处：《无线电工程》2019年第6期545-550,共6页Radio Engineering

摘　　要：随着以太网数据传输技术的广泛应用,数据传输速率不断地提升,传统的对时技术难以满足现代通信系统中实时传输的精度需求,网络业界提出了精密时钟同步协议标准(IEEE Standard for a Precision Clock Synchronization Protocol,IEEE1588),该标准采用精密时钟同步协议(Precision Time Protocol,PTP),精度可达微秒级。针对网络传输实时性的需求,阐述了PTP协议原理,通过搭建试验平台测试了在不同网络包长度和不同传输数据率下的PTP性能,分析了非PTP设备对传输精度的影响并进行了修正,将PTP协议在实际网络传输系统中的精度提高到了亚微秒级,为采用PTP协议的对时机制研究提供了参考。With the extensive use of network transmission,the speed of data transmission increases continually,and the traditional synchronization principles can’t satisfy the synchronization precision requirements of advanced communication system.In view of this problem,the network organizations propose “IEEE standard for a precision clock synchronization protocol(IEEE1588)”,this standard introduces Precision Time Protocol (PTP),which can make the precision of transmission to achieve the grade of microsecond.Aiming at the requirement of network transmission for real-time performance,the principle of PTP is expatiated.PTP performances are tested on different network packet length and different transmission speeds based on PTP testing platform.The influences of non-PTP devices on transmission precision are analyzed and compensated.The precision of PTP is improved to submircrosecond on actual network transmission.This paper could provide the reference for the study of time synchronization by using PTP.

关 键 词：时间同步 IEEE1588标准 PTP协议 时间偏移 路径时延 

分 类 号：TN915.06[电子电信—通信与信息系统]