摘要
通过二级时间节点的天地时间源互备失败现象,分析天地时间源互备失败原因。主要原因为天地时间源间时间偏差过大,从理论上计算长距离地面时间传送可能引入的时间误差,并分析造成时间误差过大的几种可能原因。由此得出,现有铁路时间同步网技术架构难以满足将来5G-R系统对高精度时间同步性能和安全可靠运维要求,有必要研究完善铁路时间同步网技术架构、组网方案,并进一步健全运维方法。
This paper analyzed causes of space-ground time source mutual standby failures,focusing on failures occurring at secondary time nodes.The main contributor identified is the excessive time deviation between space-ground time sources.A theoretical calculation was performed to estimate the time error that may arise from long-distance time transmission on the ground.Additionally,several potential causes for the excessive time error were examined.Therefore,it is found that the existing technical architecture of the railway time synchronization network is insufficient to meet the future 5G-R system’s requirements for high-precision time synchronization performance as well as safe and reliable operation and maintenance.It is essential to study and enhance the technical architecture and networking schemes of the railway time synchronization network,and further improve the operation and maintenance methods.
作者
程华
孙宇飞
岑钰
潘峰
CHENG Hua;SUN Yufei;CEN Yu;PAN Feng(Beijing Railway Communication Technology Center,Beijing 100038,China;Communication and Signaling Department,China Railway Guangzhou Group Co.,Ltd.,Guangzhou Guangdong 510080,China;Guangzhou Communication Depot,China Railway Guangzhou Group Co.,Ltd.,Guangzhou Guangdong 510080,China;Technology and Standards Research Institute,China Academy of Information and Communications Technology,Beijing 100191,China)
出处
《中国铁路》
北大核心
2024年第8期26-31,共6页
China Railway
基金
国家自然科学基金项目(42227802)。
关键词
铁路时间同步网
时间误差
时间源
天地互备失败
5G-R系统
railway time synchronization network
time error
time source
space-ground mutual standby failure
5G-R system
