AUTOMATIC FAULT-DETECTION, ISOLATION, AND RECOVERY IN TRANSPARENT ALL-OPTICAL NETWORKS

Network fault identification is an important network management functi on, which is closely related to fault management and has an impact on other network management functions such as configuration management, a nd performance management, This paper investigates fault surveillance and fault identification mechanisms for a transparent optical network in which data travels optically from the source node to the destinatio n node without going through any optical-to-electrical (O/E) or electr ical-to-optical (E/O) conversion, Mechanisms and algorithms are propos ed to detect and isolate faults such as fiber cuts, laser, receiver, o r router failures, These mechanisms allow nonintrusive device monitori ng without requiring any prior knowledge of the actual protocols being used in the data transmission.