Fast fault notifications of an optical network

Details Fast fault notifications of an optical network Fast fault notifications of an optical network

2009-02-12

2010-11-09

Curs, Nathan M (Department: 2613)

Optical communications

Fault recovery

Bypass inoperative element

C398S007000, C398S015000, C398S049000, C398S057000

Reexamination Certificate

active

07831144

ABSTRACT:
A method and apparatus for fault notification in an optical network are described herein. In one embodiment, an exemplary process includes detecting at a node that at least a portion of a first unidirectional path of an optical circuit is down, where the first unidirectional path is originated from a first terminating node. In response to the detection, the node signals the first terminating node by removing at least a portion of light of a second unidirectional path in an opposite direction of the first unidirectional path of the optical circuit, to indicate a path between the node and the first terminating node is down. Other methods and apparatuses are also described.

REFERENCES:
patent: 5757526 (1998-05-01), Shiragaki et al.
patent: 6266168 (2001-07-01), Denkin et al.
patent: 6882765 (2005-04-01), Erickson et al.
patent: 2001/0038471 (2001-11-01), Agrawal et al.
patent: 2002/0024690 (2002-02-01), Iwaki et al.
patent: 2005/0013532 (2005-01-01), Heiles et al.
patent: 2005/0025481 (2005-02-01), Fukashiro et al.
patent: 1 003 300 (2000-05-01), None
patent: WO 03/073652 (2003-09-01), None
patent: PCT/US2005/05397 (2005-06-01), None
Optical Safety Procedures and Requirements for Optical Transport Systems. ITU-T Recommendation 6.664 [online]. International Telecommunication Union, Mar. 2003 [retrieved on Jan. 18, 2007]. Retrieved from the Internet: <URL: http://www.itu.int/rec/T-REC-G.664/en>.
Rajiv Ramaswami et al., “Optical Networks, A Practical Perspective”, Second Edition, Morgan Kaufmann Publishers, ISBN 1-55860-655-6, , 831 pgs., San Francisco, CA, USA, 2002.

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