Optical communications – Fault recovery – Bypass inoperative element
Reexamination Certificate
2007-08-30
2009-08-11
Vanderpuye, Ken N (Department: 2613)
Optical communications
Fault recovery
Bypass inoperative element
C398S005000, C398S007000, C398S023000, C398S059000
Reexamination Certificate
active
07574133
ABSTRACT:
A single, normally inactive, protection channel provides protection against transponder failure in a fiber optic ring network. The protection channel is established and put into operation by a series of steps that are triggered by the detection of loss of light from one transponder by the other transponder. Each node reacts to a loss of light from another node in the same way: by rerouting incoming traffic from external sources from a working input-output interface to a protection interface, to establish a path for the protection signal, and by sending a signal enabling the two nodes to resume communication.
REFERENCES:
patent: 4009469 (1977-02-01), Boudreau
patent: 4186380 (1980-01-01), Edwin
patent: 5235599 (1993-08-01), Nishimura
patent: 5341364 (1994-08-01), Marra
patent: 5343464 (1994-08-01), Iino
patent: 5442623 (1995-08-01), Wu
patent: 5457556 (1995-10-01), Shiragaki
patent: 5517489 (1996-05-01), Ogura
patent: 5535035 (1996-07-01), DeFoster
patent: 5680235 (1997-10-01), Johansson
patent: 5777761 (1998-07-01), Fee
patent: 5867289 (1999-02-01), Gerstel
patent: 5956168 (1999-09-01), Levinson
patent: 5974027 (1999-10-01), Chapman
patent: 5978354 (1999-11-01), Taketomi
patent: 5986783 (1999-11-01), Sharma
patent: 6009076 (1999-12-01), Takatsu
patent: 6038044 (2000-03-01), Fee
patent: 6046833 (2000-04-01), Sharma
patent: 6081359 (2000-06-01), Takehana
patent: 6088141 (2000-07-01), Merli
patent: 6097516 (2000-08-01), Almstrom
patent: 6163527 (2000-12-01), Ester
patent: 6546498 (2003-04-01), Saegusa
patent: 7272307 (2007-09-01), Fang
patent: 920153 (1999-06-01), None
patent: 0920153 (1999-06-01), None
patent: 0928082 (1999-07-01), None
patent: WO9944317 (1999-09-01), None
European Patent Office supplementary European search report, completed on Jan. 10, 2008.
Li, M.J. et al, “Two-Fiber Optical Channel Shared Protection Ring with 4×4 Thermal-Optic Switches”, Aug. 30, 2006.
Ramaswami, R. and K.N. Sivarajan. Optical Networks: A Practical Perspective. San Francisco: Morgan Kaufmann Publishers, Inc., 1998. pp. 430-458.
Wu, Tsong-Ho, “Emerging Technologies for Fiber Network Survivability.” IEEE Communications Magazine, vol. 33, No. 2, Feb. 1995: 58-59, 62-74.
Dimopoulos, C. “Dynamic Performance Evaluation in a WDM Trunk and Branch Network Incorporating 1:N Wavelength Protection.” Optical Fiber Communication Conference, 2000, vol. 3, Mar. 7-10, 2000: 47-49.
Uehara, D. et al. “Highly relaible and economical WDM ring with optical self-healing and 1:N wavelength protection.” 11th International Conference on Integrated Optics and Optical Fibre Communications, vol. 4 Sep. 22-25, 1997: 65-68.
International Search Report from corresponding PCT application No. PCT/US02/16542, published Feb. 20, 2003.
Ramaswami et al., Optical Networks: A Practical Perspective, 1998, pp. 434-451, Morgan Kaufman Publishers, Inc., San Francisco, CA.
Karasan, Ezhan Optical Restoration at the Wavelength-Multiplex-Section Level in WDM Mesh Networks, IEEE Photonics Technology Letters, vol. 10 No. 9, Sep. 1998.
GR-1230-CORE, “SONET BLSR Equipment Generic Criteria.” Bellcore, Issue 3. Dec. 1996: 3-1 to 3-24, 6-3, 6-15 to 6-20.
Husch Blackwell Sanders Welsh & Katz
Kim David S
Tellas Operations, Inc.
Vanderpuye Ken N
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