Optical communications – Fault recovery – Bypass inoperative element
Reexamination Certificate
2007-09-18
2007-09-18
Vanderpuye, Kenneth (Department: 2613)
Optical communications
Fault recovery
Bypass inoperative element
C398S005000, C398S007000, C398S023000, C398S059000
Reexamination Certificate
active
10154422
ABSTRACT:
A single, normally inactive, protection ring, provides protection against a working channel 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 signal degradation or loss of light from one transponder by the other transponder. Each node reacts to a failure of another node in substantially the same way. Incoming traffic from external sources is rerouted from a working input-output interface to a protection interface, to establish a path for the protection signal. Signals are sent between nodes enabling the two nodes to resume communication. Only the portion of the protection ring between nodes is placed into service.
REFERENCES:
patent: 4009469 (1977-02-01), Boudreau et al.
patent: 4186380 (1980-01-01), Edwin et al.
patent: 5235599 (1993-08-01), Nishimura et al.
patent: 5341364 (1994-08-01), Marra et al.
patent: 5343464 (1994-08-01), Iino et al.
patent: 5365510 (1994-11-01), Nicholson et al.
patent: 5442623 (1995-08-01), Wu
patent: 5457556 (1995-10-01), Shiragaki
patent: 5517489 (1996-05-01), Ogura
patent: 5535035 (1996-07-01), DeFoster et al.
patent: 5680235 (1997-10-01), Johansson
patent: 5777761 (1998-07-01), Fee
patent: 5867289 (1999-02-01), Gerstel et al.
patent: 5956168 (1999-09-01), Levinson et al.
patent: 5974027 (1999-10-01), Chapman
patent: 5978354 (1999-11-01), Taketomi et al.
patent: 5986783 (1999-11-01), Sharma et al.
patent: 6009076 (1999-12-01), Takatsu et al.
patent: 6038044 (2000-03-01), Fee et al.
patent: 6046833 (2000-04-01), Sharma et al.
patent: 6081359 (2000-06-01), Takehana et al.
patent: 6088141 (2000-07-01), Merli et al.
patent: 6097516 (2000-08-01), Almstrom
patent: 6163527 (2000-12-01), Ester et al.
patent: 6546498 (2003-04-01), Saegusa
patent: 920153 (1999-06-01), None
patent: WO9944317 (1999-09-01), None
Karasan, E. and E. Goldstein. “Optical restoration at the wavelength-multiplex section level in WDM mesh networks.” Photonics Technology Letters. vol. 10, No. 9, Sep. 1998: 1343-1345.
Wu, Tsong-Ho. “Emerging technologies for fiber network survivability.” IEEE Communications Magazine, vol. 33, No. 2, Feb. 1995: 58-59, 62-74.
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.
Dimopoulos, C. “Dynamic performance evalulation 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 reliable and economical WDM ring with optical self-healing and 1:N wavelength protection.” 11th International Conference on Integrated Optics and Optical Fibre Communications, and 23rd European Conference on Optical Communications (Conf. Publ. No. 448), vol. 4. Sep. 22-25, 1997: 65-68.
Ramaswami, et al., Optical Networks: A Practical Perspective, 1998, pp. 434-451, Morgan Kaufmann Publishers, Inc., San Francisco, CA.
PCT Notification of Transmittal of the International Search Report or the Declaration, mailed Feb. 20, 2003 for PCT/US02/16542, counterpart of above-identified US application.
Kim David S
Tellabs Operations Inc.
Vanderpuye Kenneth
Welsh & Katz Ltd.
LandOfFree
Virtual protection channel for fiber optic ring network does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Virtual protection channel for fiber optic ring network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Virtual protection channel for fiber optic ring network will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3784089