Redundant Topology Design Method for Schedule Traffic Transmission Based on IEEE802.1CB Standard: Optimizing NW-PSP Scheduling Performance

This study proposes a method for designing redundant topologies in time-sensitive networking to transmit scheduled traffic (ST) while considering fault tolerance. In general, redundant topologies enhance network fault tolerance and are used in safety-critical applications that demand high reliability. These applications place a premium on real-time network performance, necessitating the consideration of the quality of service for time-critical traffic during the redundant topology design process. The primary objective of this study is to optimize the flowspan, which pertained to the scheduling performance of the no-wait packet scheduling problem during the redundant topology design phase. Specifically, we introduced a methodology for designing topologies tailored to transmit ST using the IEEE802.1CB mechanism. Comparisons with existing topology design approaches revealed the ability of the proposed method to enhance network fault tolerance and yield a topology that reduced flowspan of ST, thereby freeing up bandwidth for time-critical traffic.