Correlated error reduction by time-diversity

Abstract

Duplication and output comparison of the duplicated modules are widely used for error detection in high-reliable systems such as fault-tolerant, self-checking, and fail-safe systems. The duplication scheme can not detect errors if the duplicated modules produce coincident erroneous output. We propose implementation of time-diversity and present experimental results which show effect of the proposed implementation. The experiment proved that occurrence of coincident errors is decreased by time-diversity.