Dual-wave optical shared protection ring

Details Dual-wave optical shared protection ring Dual-wave optical shared protection ring

2005-02-08

2005-02-08

Sedighian, M. R. (Department: 2633)

Optical communications

Fault recovery

Wdm

C398S003000, C398S004000, C398S059000, C398S083000, C398S014000, C398S034000, C398S043000

Reexamination Certificate

active

06853811

ABSTRACT:
An optical ring is provided for propagating optical signal pairs over wavelength connections between nodes. Each optical signal pair includes two signals at different wavelengths. At one or more of the nodes, one signal of the pair acts as a transmit signal and the other acts as a receive signal. If a failure is detected the optical signal pair is redirected over a protection path without changing the wavelengths of the transmit and receive signals. This may be achieved by reversing a propagation direction for each of the signals comprised by the redirected optical signal pair.

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ITU-T, “Series G: Transmission Systems and Media, Digital Systems and Networks,” G.841, 10/98.

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