End-to-end latency upbound calculation tool for token bucket traffic shaping flows

With the expansion of Internet application fields, traditional Ethernet cannot meet the real-time and deterministic requirements of time- and delay-sensitive applications. In order to solve this problem, the IEEE time-sensitive network group proposes a variety of Traffic shaping mechanisms. Among them, Asynchronous Traffic Shaper (ATS) scheduling can provide high link utilization and deterministic delay guarantee in the case of multiple traffic mixing in the network. And there is no need for strict clock synchronization between network devices. In order to solve the calculation problem of the ATS scheduling mechanism, this paper completes the theoretical delay upper bound calculation tool for flows with an ATS mechanism based on the delay analysis model in the Urgency-Based Scheduler (UBS).