Transparent optical self-healing-ring communication network

Details Transparent optical self-healing-ring communication network Transparent optical self-healing-ring communication network

1996-10-15

1999-05-11

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359110, 359128, 359130, 359161, H04B10/12

Patent

active

059033711

ABSTRACT:
An optical self-healing-ring communication network is described which include: a first optical communication line, forming a closed optical path; at least two add/drop nodes for optical signals, optically connected along the line; a second optical communication line forming a closed optical path and optically connected to the optical-signal add/drop nodes. Defined in the network are first and second mutually opposite travel directions of the optical signals, with respect to the position of the optical-signal add/drop nodes. At least one of said nodes further comprises selection means, controlled by the optical signals, for the selective dropping of the optical signals from one of the communication lines. At least one of the optical-signal add/drop nodes further include means for the simultaneous input of at least one optical signal in the first direction along the first communication line and in the second direction along the second communication line.

REFERENCES:
patent: 5406401 (1995-04-01), Kremer
patent: 5680235 (1997-10-01), Johansson
Wagner et al, "Multiwavelength Ring Networks for Switch Consolidation and Interconnection", IEEE, ICC Conference, 1992.
IEEE International Conference on Communications '93 May 23-26, 1993 Geneva, Switzerland, pp. 1245-1251 Elrefaie, "Multiwavelength Survivable Ring Network Architectures".
IEEE Communications Magazine, vol. 29, No. 6, Jun. 1991, US pp. 51-58, Sosnosky et al, "SONET Ring Applications for Survivable Fiber Loop Networks".
Electronics Letters, vol. 28, No. 25, Dec. 3, 1992, Stevenage GB, Elrefaie, "Fiber Amplifiers in Closed Ring WDM Networks".

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