Multiplex communications – Fault recovery – Bypass an inoperative station
Reexamination Certificate
2008-05-13
2008-05-13
Nguyen, Chau (Department: 2619)
Multiplex communications
Fault recovery
Bypass an inoperative station
C370S404000
Reexamination Certificate
active
07372806
ABSTRACT:
In a communications network where first and second nodes are interconnected by communication links, a source node transmits a path setup message for requesting a traffic path to a destination node. Each of the first and second nodes includes routing control means for establishing first and second transport paths on a first fault recovery layer between the first and second nodes. The first node further includes a database for storing identities of the first and second paths as a single virtual link as viewed from the source node. The first node responds to the path setup message from the source node for establishing the traffic path on a second fault recovery layer through the first transport path. The first and second nodes accommodate the traffic path through the second transport path when the first transport path is not working properly.
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Foley & Lardner LLP
NEC Corporation
Nguyen Chau
Smith Marcus R
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