Abstract: Time Sensitive Networking (TSN), as a real-time Ethernet technology with deterministic transmission characteristics, has gradually been applied in safety critical scenarios such as automotive and aerospace. In these scenarios, link failures caused by random environmental factors may interrupt TSN connections, thereby affecting static configurations such as TSN time synchronization trees. Therefore, real-time maintenance of network topology has become the key to ensuring system reliability in security critical scenarios. However, there is relatively little research on TSN topology state monitoring, which makes it difficult to meet the high real-time requirements of TSN systems for network monitoring. Based on this, this paper first compares and analyzes the problems and challenges of existing TSN topology state monitoring methods in safety critical scenarios from the perspective of real-time performance; Based on the above analysis, this article proposes a TSN fast topology state discovery protocol for security critical scenarios - FTDP. In FTDP, each node displays the planned monitoring path guidance monitoring probe through the source routing paradigm, requiring only one probe to collect information from the entire network, reducing the delay of topology state discovery; Finally, through testing in a real hardware environment, the experimental results show that the network topology monitoring delay within 10 nodes does not exceed 100 microseconds, confirming that the FTDP protocol can collect network topology in high real-time to complete monitoring. Furthermore, by comparing existing methods, the advantages of FTDP in real-time are further confirmed.

摘要： ：时间敏感网络(Time-Sensitive Networking, TSN) 作为具有确定性传输特性的实时以太网技术，目前已逐渐应用到车载、航空航天等安全关键场景中。在这些场景实际运行中，随机环境等因素导致的链路故障可能中断TSN连接，进而影响TSN时间同步树等静态配置。因此，实时维护网络拓扑成为安全关键场景下保证系统可靠性的关键。然而，现有TSN拓扑状态监控的相关研究较少，难以满足TSN系统对网络监测的高实时要求。基于此，本论文首先从实时性的角度对比分析在安全关键场景下现有的TSN拓扑状态监测方法的问题与挑战；结合上述分析，本文提出了一种面向安全关键场景的TSN快速拓扑状态发现协议——FTDP，FTDP中各个节点通过源路由范式来显示规划监测路径引导监测探针，仅需一个探针收集全网信息，减少了拓扑状态发现延时；最后，本文通过在真实硬件环境中测试，实验结果表明，10个节点内的网络拓扑监测延时不超过100微秒，证实了FTDP协议能够高实时地收集网络拓扑来完成监测，并且通过对现有方法进行对比，进一步证实了FTDP在实时性上的优势。