时间敏感网络中时间同步精度优化策略研究  

Research on Time Synchronization Accuracy Optimization Strategies in Time-Sensitive Network

作　　者：张平[1] 余卓平[1] 张林林[2] 闫贵良 ZHANG Ping;YU Zhuoping;ZHANG Linlin;YAN Guiliang(College of Automotive Studies,Tongji University,Shanghai 201804,China;Pan Asia Technical Automotive Center Co.,Ltd.,Shanghai 201804,China;Z-One Technology Co.,Ltd.,Shanghai 201804,China)

机构地区：[1]同济大学汽车学院,上海201804 [2]泛亚汽车技术中心有限公司,上海201804 [3]零束科技有限公司,上海201804

出　　处：《汽车零部件》2024年第8期45-50,共6页Automobile Parts

摘　　要：时间敏感网络(TSN)中的时间同步精度在实际应用中往往难以达到理想状态,这将影响车辆系统的性能和安全性。通过深入分析汽车行业对时间同步精度的特殊需求以及现有TSN的局限性,提出基于热备份时钟切换逻辑的时间同步策略,有效避免了时间基础的跳变,进一步确保了系统在时钟切换过程中保持高精度的时间同步,也避免了因切换引起的时间基础不一致,从而维护了时间同步系统的整体稳定性和性能需求。通过试验验证和仿真分析验证了该策略的有效性。Time synchronization accuracy in time-sensitive network (TSN) often falls short of the ideal state in practical applications, which canimpact the performance and safety of vehicle systems. This paper conducts an in-depth analysis of the automotive industry’s specific requirements fortime synchronization accuracy and the limitations of existing TSN. It proposes a clock synchronization strategy based on hot backup clock switchinglogic, effectively avoiding the fluctuation of the time base, thereby ensuring that the system maintains high-precision clock synchronization duringthe clock switching process. This strategy prevents inconsistencies in the time base caused by switching, thus maintaining the overall stability andperformance requirements of the time synchronization system. The effectiveness of this strategy is verified through experimental validation andsimulation analysis.

关 键 词：车载以太网 时间敏感网络 时间同步 热备份时钟 切换逻辑 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]