# 광 다단계 상호연결망의 단일 누화고장에 대한 해석적 고장진단 기법

• Kim, Young-Jae (Dept.of Electric Electronics Information System Engineering, University of Ulsan) ;
• Cho, Kwang-Hyun (Dept.of Electric Electronics Information System Engineering, University of Ulsan)
• 김영재 (울산대학교 전기전자정보시스템공학부) ;
• 조광현 (울산대학교 전기전자정보시스템공학부)
• Published : 2002.03.01

#### Abstract

Optical Multistage Interconnection Networks(OMINs) comprising photonic switches have been studied extensively as important interconnecting building blocks for communication networks and parallel computing systems. A basic element of photonic switching networks is a 2$\times$2 directional coupler with two inputs and two outputs. This paper is concerned with the diagnosis of cross-talk-faults in OMINs. As the size of today's network becomes very large, the conventional diagnosis methods based on tests and simulation have become inefficient, or even more, impractical. In this paper, we propose a simple and easily implementable algorithm for detection and isolation of the single crosstalk-fault in OMINs. Specifically, we develope an algorithm fur the isolation of the source fault in switching elements whenever the single crosstalk-fault is detected in OMINS. The proposed algorithm is illustrated by an example of 16$\times$16 banyan network.

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