Wdm optical communications networks and methods for...

Details Wdm optical communications networks and methods for... Wdm optical communications networks and methods for...

H - Electricity

04

B

H04B 10/20 (2006.01) H04J 14/02 (2006.01) H04Q 11/00 (2006.01)

Patent

CA 2270701

Methods for provisioning optical communications networks employing wavelength division multiplexing (WDM) technology provide for routing and wavelength assignment of a set of connection requests. Avoiding many of the pitfalls of exactly optimum solutions, the present heuristic methods provide much shorter execution times while providing near-optimum performance. Adaptations of the basic solutions provide design of restorable networks capable of handling a specified set of failures. This approach advantageously is based on considering all failures simultaneously, and performs better than solutions in which independent designs are developed for each failure. Networks designed using these methods store configuration information for primary network configurations and for one or more restoration networks. Upon startup or upon network failures, predetermined configuration directions are applied to wavelength selective cross-connects (WSXC) at each network node to establish (or reestablish) desired network node interconnections.

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