A spare router based reliable Network-on-Chip design

This paper presents a fault tolerant reconfigurable Network-on-Chip (NoC) architecture using router redundancy. In case of occurrence of fault in the active router, the spare router takes its place thus the system operates normally. This scheme is topology independent, so any topology with defined routing algorithm is suitable for implementation. The system has been compared in terms of reliability, mean time to failure (MTTF) and area overhead with existing works. For a 10 × 10 mesh, it gives a 1.14 reliability gain over quad-spare mesh, 1.42 reliability gain over column-spare mesh and 21.195 reliability gain over normal mesh. The mean time to failure (MTTF) gains over column-spare, quad spare and normal mesh are 3.19, 7.51, and 33.38 respectively. We have also presented a system performance report which includes throughput and latency of the proposed design.