Optimal reconfiguration of WSI multipipeline arrays

Abstract

This paper presents a new algorithm for reconfiguring WSI multipipeline arrays in the presence of faults in links, processing elements (PE's) and switching elements (SE's). Using a fault model in which a PE and link can be either fault free or faulty and a SE is modeled by relating its switching capabilities to its status and the status of the connecting links, it is proved that an algorithm which maximizes the number of reconfigured pipelines (optimality) is possible in an execution complexity lower than a previous algorithm based on a maximum flow approach. The proposed approach is based on a greedy algorithm with an execution complexity of O(n/spl times/m), where n is the number of stages (or columns) of the array and m is the number of PE's in a stage.<>