Fault-tolerant wormhole routing algorithm for mesh networks

Abstract

A multicomputer system can hardly avoid having faulty components in the real world. A good fault-tolerant routing scheme should tolerate as many fault patterns as possible and, hence, reduce the number of disabled functional nodes. The authors consider disconnected unsurrounded faults, i.e. all disconnected faults discussed in the literature. In disconnected unsurrounded fault models, there is no restriction on the shapes of faults. In the proposed routing scheme, a message always leaves each f-ring encountered at an appropriate node such that no message will encounter the same f-ring again and therefore never get trapped in faults.