Design of a Wireless Router with Virtual Channel Fault Tolerant in WiNoC

Abstract

Due to chip manufacturing process defects and other factors, the virtual channel permanent fault may occur at the wireless interface in the WiNoC. This fault will affect the operating efficiency of the wireless router and degrade the network performance of the chip. In order to effectively tolerate permanent faults in virtual channels, faults are subdivided into coarse-grained and fine-grained faults. When a fine-grained fault of the virtual channel occurs at the wireless interface, the remapping mechanism is used to tolerate it; when a coarse-grained fault occurs, this unavailable virtual channel is directly abandoned and permanent fault information is broadcast to all nodes in the network. Packets that require a wireless channel can be routed to avoid passing through the fault wireless router. This method can effectively reduce the routing delay caused by the permanent fault of the virtual channel at the wireless interface. Experiments show that compared with the traditional WiNoC and other WiNoC fault-tolerant schemes, the fault-tolerant scheme proposed in this paper has a great improvement in performance and the advantages of low overhead and good scalability.