时间触发以太网与时间敏感网络时钟同步失效对比分析  

Comparative Analysis of Clock Synchronization Failure Between Time-Triggered Ethernet and Time-Sensitive Network

作　　者：彭逸飞 涂晓东 许都 王颢钢 谢军 蒋体钢 PENG Yifei;TU Xiaodong;XU Du;WANG Haogang;XIE Jun;JIANG Tigang(School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu 611731)

机构地区：[1]电子科技大学信息与通信工程学院,成都611731

出　　处：《电子科技大学学报》2023年第5期718-727,共10页Journal of University of Electronic Science and Technology of China

摘　　要：确定性网络技术逐步应用于航电、工业自动化、车载等任务关键系统,如时间触发以太网(TTE)、时间敏感网络(TSN)等,但时间同步技术是这类网络可靠运行的基础,目前缺乏量化分析模型以及不同协议时间同步服务可靠性对比分析。针对该问题,分析了上述两种协议时间同步过程,提炼出导致时间同步失效的因素,提出两种时间同步协议失效概率的评估模型,在此基础上对比分析了失效场景与失效概率,最后使用OPNET对两种时间同步协议的失效概率进行仿真,仿真结果与建模结果一致。该时间同步失效概率评估模型可供行业参考。Deterministic network technology like Time-triggered Ethernet(TTE)and Time-sensitive Networking(TSN)is gradually applied to mission critical systems such as avionics,industrial automation and vehicle mounted systems.Time synchronization technology is the essential precondition for these networks’proper functioning.Nevertheless,there is no analytical model nor comparative analysis for the reliability of time synchronization services in different protocols.Aiming at this problem,we analyze the time synchronization process of the two protocols of above-mentioned networks,and extract the factors that lead to the failure.Then,we propose a theoretical evaluation model of the failure probability for these two protocols.On this basis,the failure scenario and failure probability are compared and analyzed.Finally,we use OPNET simulator to verify the consistency with the theoretical analysis.The time synchronization failure probability evaluation model proposed in this paper can provide reference for relevant personnel.

关 键 词：失效分析 可靠性 时间同步服务 时间敏感网络 时间触发以太网 

分 类 号：TP336[自动化与计算机技术—计算机系统结构]