中国铁道科学2026，Vol.47Issue(3)：220-229,10.DOI:10.3969/j.issn.1001-4632.2026.03.19
基于GNSS的列车时频溯源与同步方法及性能评估
A GNSS-Based Method for Train Time-Frequency Traceability and Synchronization with Performance Evaluation
摘要
Abstract
To address the issues of inconsistent traceability for train time nodes and the isolation between train-to-ground and train-to-train time-frequency within the current railway time synchronization network,a method based on Global Navigation Satellite System(GNSS)for train time-frequency traceability and synchronization was proposed.By constructing high-precision time-frequency transfer and traceable synchronization links between train-to-ground and train-to-train nodes,the time-frequency transfer and traceable synchronization between train and ground nodes and among train nodes were realized.A dedicated device was developed,and the integrated performance of time-frequency transfer and traceability of the train was first evaluated based on the round testing railway line of the National Railway Testing Center.The results demonstrate that the noise level of time-frequency transfer link between train-to-ground is 2-6 ns,with an uncertainty of 6.6 ns.The noise level of time-frequency transfer link between train-to-train is 4-7 ns,with an uncertainty of 7.5 ns.In over 90％of cases,the train node can achieve high-precision reproduction for the time scale of the ground node with a difference of less than±10 ns.This method can provide reference and support for high-precision time-frequency transfer and traceable synchronization between train-to-ground and train-to-train nodes.关键词
铁路时间同步网/列车时间节点/传递与溯源/环行铁道/GNSSKey words
Railway time synchronization network/Train time node/Transfer and traceability/Round testing railway line/Global Navigation Satellite System(GNSS)分类
交通工程引用本文复制引用
徐宁,韦宝盈,何之煜,梁坤..基于GNSS的列车时频溯源与同步方法及性能评估[J].中国铁道科学,2026,47(3):220-229,10.基金项目
国家自然科学基金资助项目(12473072) （12473072）
国家铁路智能运输系统工程技术研究中心开放课题(2023YJ360) （2023YJ360）
