Fault management for adjustable pre-allocation wavelength division multi-access systems

Fault management is an essential function of the network management to secure continuous and efficient operations of a network system. We initiate the fault management study for the adjustable pre-allocation wavelength division multi-access system (AP-WDMA). The subjects investigated include fault detection, fault location, and fault tolerant design. Based on the fault probability consideration for each station, two models are presented. One treats each station as a whole unit and the other further divides each station into 5 parts. For both models, the fault detection and fault location are performed in a two-pass operation. Finally, a fault-tolerant design for the AP-WDMA is proposed. A 2-stage reconfiguration algorithm is also provided in this study.