Optical communications – Fault recovery – Bypass inoperative element
Reexamination Certificate
2008-01-30
2010-12-07
Phan, Hanh (Department: 2613)
Optical communications
Fault recovery
Bypass inoperative element
C398S003000, C398S004000, C398S059000, C398S007000, C398S013000, C398S020000, C398S045000, C370S216000, C370S217000, C370S225000, C370S227000, C370S228000, C385S016000, C385S017000, C385S018000, C385S024000
Reexamination Certificate
active
07848642
ABSTRACT:
A method and system provide capacity-efficient restoration within an optical fiber communication system. The system includes a plurality of nodes each interconnected by optical fibers. Each optical fiber connection between nodes includes at least three channel groups with different priority levels for restoration switching in response to a connection failure. The system maintains and restores full-capacity communication services by switching at least a portion of the channel groups from a first optical fiber connection to a second optical fiber connection system based on the priority levels assigned to the channel groups. Service reliability is effectively maintained without to incurring additional costs for dedicated spare optical fiber equipment by improving idle capacity utilization.
REFERENCES:
patent: 5884017 (1999-03-01), Fee
patent: 6222653 (2001-04-01), Asahi
patent: 6735392 (2004-05-01), Elahmadi et al.
Chaudhuri Sid
Cortez Bruce Gilbert
Zelingher Simon S.
AT&T Intellectual Property II L.P.
Phan Hanh
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