Hierarchical scheduling and real-time analysis for vehicular time-sensitive network
Yuefei Wang, Fei Huang, Yang Li, Bin Pan, Yuan Wu · 2019
Time-sensitive network (TSN) is regarded as the perspective communication network for the intelligent vehicle application because of its reserved bandwidths, QoS mechanisms, low transmission latency. The message scheduling in the TSN have an important influence on the reliability and safety of vehicles. In this paper, the TSN messages between the vehicular electronic control units are classified into the control data traffic (CDT), the stream reservation (SR) and the best effort (BE). A hierarchical scheduling infrastructure for the three types of messages are presented, which consists of three scheduling strategies, i.e., FIFO, CBS and TAS. For the hierarchical scheduling mechanism, the influences of both FIFO and TAS on CBS are analyzed and an approach for the derivation of worst-case response times of SR message is proposed. The experiments in Vector CANoe show that the proposed method in this paper can effectively obtain the upper bound of SR message transmission in TSN. It can be used to improve the design of TSN system.