Self-healing and Solutive Scheme of All Optical Networks Based on Wavelength-division Multiplexing

The background of all-optical networks based on wavelength-division multiplexing is briefly analyzed in this paper, and the basic concepts and advantages of AON are introduced. Two-fiber unidirectional path-switched rings, four-fiber bidirectional self-healing rings and their schemes for network protection are mainly discussed. Compared to mesh networks, restoration in mesh networks is more important and efficient.