Fault-tolerant Routing Algorithm in 2D-Mesh

A fault-tolerant routing algorithm for 2D-Mesh that uses only two virtual channels was presented.Previously,Boppana needs 4 virtual channels,and Duan needs 3 virtual channels.The algorithm is based on the block fault model.The fault region can be f-ring and f-chain at the same time.Shortest paths are used for routing if there are no faults,while detour paths are used for blocked messages.We have proved that our algorithm is deadlock-free under the non-overlapping and overlapping situation.