基于时间敏感网络的列车通信时间同步研究
张军贤1梁汝军1黄涛1张稳亿2,3徐龙2,3熊伟2,3朱海龙4,5彭开来5
Research on Time Synchronization of Train Communication Based on Time-sensitive Networking
ZHANG Junxian1LIANG Rujun1HUANG Tao1ZHANG Wenyi2,3XU Long2,3XIONG Wei2,3ZHU Hailong4,5PENG Kailai5
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作者信息:1.中车南京浦镇车辆有限公司， 210031， 南京
2.深圳市三旺通信股份有限公司， 518055， 深圳
3.上海三旺奇通信息科技有限公司， 201601， 上海
4.北京邮电大学信息与通信工程学院， 100876， 北京
5.网络通信与安全紫金山实验室， 211111， 南京
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Affiliation:1.CRRC Nanjing Puzhen Co., Ltd., 210031, Nanjing, China
2.3onedata Co., Ltd., 518055, Shenzhen, China
3.3onedata Qitong Co., Ltd., 201601, Shanghai, China
4.Beijing University of Posts and Telecommunications, 100876, Beijing,China
5.Purple Mountain Laboratories, 211111, Nanjing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.05.011
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中图分类号/CLCN:U231.7
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栏目/Col:研究报告
摘要:
［目的］列车通信网络中NTP(网络时间协议)的毫秒级精度，已日渐无法满足大流量和确定性传输的要求，同时现有研究局限于将PTP（精确时钟同步协议）应用于列车通信场景，而缺乏列车通信网络中的时间敏感网络时间同步研究，因此有必要进行相关分析。［方法］首先，结合列车通信网络中时间同步的研究现状，根据时间敏感网络同步协议分析了列车通信网络中的偏差和时延；其次，提出了时钟服务源故障和跳变情况下的冗余机制；最后，通过模拟时间同步过程，验证了冗余机制的效果。［结果及结论］时间敏感网络能较好地适用于列车通信网络中时钟服务源的时间同步，且其冗余机制能较好地避免时钟服务源的故障和跳变带来的同步误差。
Abstracts:
［Objective］ The millisecond-level precision of NTP (network time protocol) in train communication networks has increasingly failed to meet the requirements of high traffic and deterministic transmission. Meanwhile, existing research is limited to applying the PTP (precision time protocol) to train communication scenarios, lacking research on time synchronization in time-sensitive networks within train communication networks. Therefore, it is necessary to conduct relevant analysis. ［Method］ Firstly, based on the current research status of time synchronization in train communication networks, the deviation and delay in train communication networks are analyzed according to time-sensitive network synchronization protocols. Secondly, redundancy mechanism for clock service source failures and jumps are proposed. Finally, the effectiveness of the redundancy mechanism is verified through simulation of the time synchronization process. ［Result & Conclusion］ Time-sensitive networks are well suited for time synchronization of clock service sources in train communication networks, and their redundancy mechanisms effectively mitigate synchronization errors caused by clock service source failures and jumps.
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