Method and system for restoring a distributed telecommunications

Details Method and system for restoring a distributed telecommunications Method and system for restoring a distributed telecommunications

1997-01-09

1999-12-07

Mullen, Thomas

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

340827, 370225, H04J 1400

Patent

active

059992867

ABSTRACT:
This invention includes a path-based method and system that restore a distributed telecommunications network (90) from a failure condition (92). First, the method and system notify all the network nodes (22, 24, 26, 28) of the fault of a link (12). Next, an alternate route finding phase occurs for finding alternate paths (S-T1-T4-D) to reroute the disrupted traffic. For finding alternate paths (S-T1-T4-D), the alternate route finding phase includes sending messages (70, 100) throughout the distributed telecommunications network. Upon finding some alternate paths (S-T1-T4-D), the method and system send connect commands (100) to make the necessary cross connections in the distributed telecommunications network nodes (22, 24, 26, 28) that are on the alternate paths (S-T1-T4-D). Throughout the distributed network restoration process, the method and system synchronize (62) the distributed telecommunications network nodes to avoid possible race conditions among the nodes.

REFERENCES:
patent: 4677614 (1987-06-01), Circo
patent: 4747097 (1988-05-01), Ohya et al.
patent: 5093824 (1992-03-01), Coan et al.
patent: 5235599 (1993-08-01), Nishimura et al.
patent: 5495471 (1996-02-01), Chow et al.
patent: 5604729 (1997-02-01), Aoki et al.

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