Method and apparatus for dynamic provisioning of reliable...

Optical communications – Fault recovery – Bypass inoperative element

Reexamination Certificate

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C398S001000, C398S002000, C398S003000, C398S004000, C398S007000, C398S010000, C398S012000, C398S017000, C398S019000, C398S045000, C398S048000, C398S050000, C398S054000, C398S056000, C398S057000, C398S033000, C398S031000, C398S059000, C370S216000, C370S217000, C370S221000, C370S224000, C370S227000, C370S228000, C370S389000, C370S238000

Reexamination Certificate

active

07460783

ABSTRACT:
Method and apparatus for dynamic provisioning of reliable connections in the presence of multiple failures in optical networks are described. One embodiment is a method for allocation of protection paths after a failure in an optical network. The method comprises, responsive to a failure in an active lightpath, switching traffic on the active lightpath to a protection path; subsequent to the switching, identifying all active lightpaths in the network that no longer have an available protection path; and attempting to allocate a protection path to each of the identified active lightpaths.

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Choi, et al.; On Double-Link Failure Recovery in WDM Optical Networks; INFOCOM 2002; Twenty-First Annual Joint Conference of the IEEE Computer and Communications Societies; 2002; vol. 2; pp. 808-816.
Sengupta, et al.; From Network Design to Dynamic Provisioning and Restoration in Optical Cross-Connect Mesh Networks: An Architectural and Algorithmic Overview; IEEE; Jul.-Aug. 2001; vol. 15, Iss. 4, pp. 46-54.
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