AFRM: Adaptive and Fault-Tolerant Routing Method for 2D Network-on-Chip

High reliability against undesirable effects is one of the key objectives in the design for Networkon-Chip (NoC). As a result, designing reliable and efficient routing method is highly desirable. This paper presents a novel turn model called NMad-y using one and two virtual channels along the X-and Y-dimensions, respectively, and Adaptive and Fault-tolerant Routing Method (AFRM) which is designed based on the NMad-y turn model. AFRM can effectively tolerate multiple faulty routers and links in more complicated faulty situations by the link status of neighbor routers within two hops. AFRM is able to impose the reliability of network without losing the performance of network. Simulation results show that AFRM achieves better saturation throughput (0.83% on average) than a state-of-the-art fault-tolerant routing method and maintains high reliability of more than 97.43% on average.