Thanks to the standards being developed by IEEE Time-Sensitive Networking (TSN) Task Group, the classical IEEE 802.1 Ethernet architecture is now enhanced to accommodate real-time and safety-critical requirements emerging in various cyber-physical systems. The deterministic nature of the communication is achieved through the time-triggered traffic, which requires introducing strict scheduling constraints that may be an obstacle in finding a feasible schedule. In this article, we propose a simple hardware enhancement of a switch along with a relaxed scheduling constraint that increases schedulability and throughput of the time-triggered traffic but maintains the deterministic nature and timeliness guarantees in a TSN network. We give a formal proof to justify the claims and an algorithm benchmarking and experimental validation to demonstrate the gains. The results show that the number of flows that can be scheduled in the model with the relaxed constraint is on average by 75.1 % larger than in the traditional model.

中文翻译：

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增强 IEEE 802.1Qbv 时间敏感网络中时间触发流量的可调度性和吞吐量

由于 IEEE 时间敏感网络 (TSN) 任务组正在制定标准，经典的 IEEE 802.1 以太网架构现在得到了增强，以适应各种网络物理系统中出现的实时和安全关键要求。通信的确定性是通过时间触发的流量实现的，这需要引入严格的调度约束，这可能是寻找可行调度的障碍。在本文中，我们提出了一种简单的交换机硬件增强以及宽松的调度约束，该约束提高了时间触发流量的可调度性和吞吐量，但在 TSN 网络中保持了确定性和及时性保证。我们提供了一个正式的证明来证明这些声明的合理性，并提供了一个算法基准测试和实验验证来证明收益。结果表明，在放松约束的模型中，可调度的流数平均比传统模型大75.1%。