Method of protecting as against span failures in a...

Details Method of protecting as against span failures in a... Method of protecting as against span failures in a...

2006-10-24

2006-10-24

Harper, Kevin C. (Department: 2616)

Multiplex communications

Fault recovery

Bypass an inoperative channel

Reexamination Certificate

active

07126908

ABSTRACT:
A method for protecting a span that connects a first node to a second node in a communication network includes the steps of creating a first protection virtual path connecting the first node with the second node through at least a third node using a routing-protocol and a signaling-protocol and monitoring a failure condition in the span. Upon detecting the failure condition in the span, the method also includes the steps of switching automatically to the first protection virtual path, and creating a new protection virtual path, using the routing-protocol and the signaling-protocol, for each span in the first protection virtual path, connecting two nodes at each end of the given span through at least another node.

REFERENCES:
patent: 5239537 (1993-08-01), Sakauchi
patent: 5307353 (1994-04-01), Yamashita et al.
patent: 2004/0156310 (2004-08-01), Fredette et al.

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