Analysis of TSN for Industrial Automation based on Network Calculus

Time-Sensitive Networking (TSN) Ethernet is becoming a primary industrial networking technology, since it provides bounded latency capability with broad reaching ecosystem, supporting both real-time communications and non-time-critical communications in a factory. In TSN, QoS-based shaping is a core technology to provide bounded latency. Network calculus is a theory which aims at worst-case performance analysis in the network. In the paper, latency upper bound of TSN for industrial automation scenario is analyzed based on Network Calculus. Credit-based Shaping (CBS) combined with Strict Priority (SP) is used as the specific QoS-based shaping mechanism of TSN. Relating factors that influence the latency upper bound of TSN are also studied.