Detection and location of multiple faults in baseline interconnection networks

An algorithm for fault diagnosis (detection and location) of baseline interconnection networks in the presence of multiple faults is presented. This algorithm requires 2(1+log₂ N) tests, where log₂ N is the number of stages. Multiple fault diagnosis is possible provided: (a) there exists no logically erroneous and unidentified outputs in each faulty switching element and (b) multiple link faults (of the type stuck-at-0 stuck-at-1) do not exist in the network. Fault location is accomplished using an iterative process which checks each stage of the multistage interconnection network. A new functional description of the network is introduced to facilitate fault location