In traffic transmission, failures of links or devices can reduce the traffic reception rate, thus impacting the network's reliability. The IEEE 802.1CB Frame Replication and Elimination for Reliability (FRER) protocol is a standard in Time-Sensitive Networking (TSN) that increases network fault tolerance by transmitting traffic through backup paths. In scenarios with mixed traffic transmission, it may be necessary to combine FRER with traffic shaping mechanisms to simultaneously meet the requirements of high reliability and low latency for high-priority traffic. However, there is currently limited research on the combination of FRER and traffic shaping mechanisms. To address this issue, this paper investigates the impact of combining FRER with Time-Aware Shaping (TAS) and Credit-Based Shaping (CBS) on traffic forwarding, using the OMNeT++ platform for simulation experiments. The simulation results show that, at the traffic forwarding layer, the impact of the FRER mechanism on the TAS mechanism mainly lies in the potential inability of traffic to pass through its original time slot, whereas the impact on the CBS mechanism could result in traffic congestion. Based on the potential issues, simple solutions are proposed.
Research on Redundant Traffic Scheduling in Time-Sensitive Networking
2025-01-17
743972 byte
Conference paper
Electronic Resource
English