Wavelength assignment algorithms for WDM ring architectures

Self-healing wavelength-division-multiplexing (WDM) rings are the leading candidate architectures for high capacity local exchange carrier (LEC) networks [1, 2, 3, 4, 5, 6], because of the survivability capabilities they provide and the fact that their capacity can be shared by all the nodes connected to a ring. Self-healing ring (SHR) architectures provide restoration capability for a single link and network switch failure through their ring topology and simple but fast automatic protection switching schemes. These architectures are best suited to the implementation of high capacity Local Area Networks (LAN’s), interoffice, or university campus networks [7].

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