Timing Analysis of AVB Traffic in TSN Networks Using Network Calculus
Timing Analysis of AVB Traffic in TSN Networks Using Network Calculus
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DOI：
10.1109/rtas.2018.00009
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发表时间：
2018-04
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影响因子：
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通讯作者：
Luxi Zhao;P. Pop;Zhong Zheng;Qiao Li
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文献类型：
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作者：
Luxi Zhao;P. Pop;Zhong Zheng;Qiao Li
时间敏感网络 (TSN) 是扩展以太网以支持安全关键和实时应用程序的标准集合。 TSN 集成了多种流量类型，即基于门控列表 (GCL) 调度的时间触发 (TT) 流量、需要有限延迟的音频视频桥接 (AVB) 流量以及不提供任何保证的尽力而为 (BE) 流量。本文提出了一种基于网络演算的方法，用于确定具有非抢占和抢占模式的 TSN 网络中 AVB 流量的最坏情况端到端延迟。我们考虑 GCL、“保护带”（即阻止其他流量传输的时间窗口）以及 AVB 流量服务上的抢占开销对 TT 流量的影响。我们为AVB信用提供非溢出条件证明，用于控制AVB流量传输。该分析方法在实际测试用例上进行评估，并与相关工作进行比较。
Time-Sensitive Networking (TSN) is a collection of standards that extend Ethernet to support safety-critical and real-time applications. TSN integrates multiple traffic types, i.e., Time-Triggered (TT) traffic scheduled based on Gate-Control-Lists (GCLs), Audio-Video-Bridging (AVB) traffic that requires bounded latencies, and Best-Effort (BE) traffic, for which no guarantees are provided. This paper proposes a Network Calculus-based approach to determine the worst-case end-to-end delays of AVB traffic in a TSN network with both non-preemption and preemption modes. We consider the effects of TT traffic due to GCLs, "guard bands", i.e., time windows that block other traffic from transmitting, and preemption overhead on the service for AVB traffic. We provide a proof of non-overflow condition for AVB credit, which is used to control the AVB traffic transmission. The analysis method is evaluated on realistic test cases, and compared to related work.