通信学报2024，Vol.45Issue(9)：1-13,13.DOI:10.11959/j.issn.1000-436x.2024165
Virtual Scoping:轻量级可扩展的TSN时间同步精度测量方法
Virtual Scoping:lightweight and scalable TSN time synchronization accuracy measurement method
摘要
Abstract
Aiming at the problems of existing time synchronization accuracy measurement methods based on clock pulse,such as complex measurement system composition,limited measurement scale by the number of instrument acqui-sition interfaces,and inability of measurement data to support real-time network management and control,a lightweight and scalable time synchronization accuracy measurement method called Virtual Scoping(VS)was proposed based on the centralized management and control architecture of time-sensitive networking(TSN).Ability to virtualize oscilloscope functions in the network control plane.Firstly,the parameter DriftTime was defined by the method,which could be used to accurately estimate synchronization accuracy.This parameter was calculated from protocol status data such as synchro-nization message transmission timestamps,residence delay,and link delay.Finally,the V-Scope tool was implemented in the network control plane and deployed in a prototype system built on the OpenTSN open-source project for experimenta-tion.The results demonstrate that V-Scope exhibits only nanosecond-level errors compared to measurements obtained from professional testing equipment.Additionally,the feasibility and advantages of the VS method in supporting network man-agement functions are discussed.As an example of accuracy optimization,a frequency offset compensation algorithm based on V-Scope is designed and implemented,which improves the synchronization accuracy of the prototype system by 32.3%.关键词
时间敏感网络/时间同步/同步精度测量/网络管理控制Key words
time-sensitive networking/time synchronization/synchronization accuracy measurement/network manage-ment and control分类
信息技术与安全科学引用本文复制引用
孙寅涵,孙志刚,付文文,李文超,黄容..Virtual Scoping:轻量级可扩展的TSN时间同步精度测量方法[J].通信学报,2024,45(9):1-13,13.基金项目
全国重点实验室基金资助项目(No.2023-KJWPDL-14)The National Key Laboratory Foundation Project(No.2023-KJWPDL-14) （No.2023-KJWPDL-14）
