Method for monitoring the transmission quality of an optical...

Details Method for monitoring the transmission quality of an optical... Method for monitoring the transmission quality of an optical...

2005-11-15

2005-11-15

Pascal, Leslie (Department: 2633)

Optical communications

Diagnostic testing

Determination of communication parameter

C398S014000, C398S017000, C398S020000, C398S034000

Reexamination Certificate

active

06965736

ABSTRACT:
A method for monitoring the transmission quality of an optical transmission system, such as, for example, an optical wavelength division-multiplex network. An amplitude histogram of an optical signal (transmission signal) transmitted over the transmission system may be plotted and classified, with the assistance of a neural network, according to bit error rates and/or causes of faults. The need for setting requirements for transmission mode, transmission format and/or transmission timing cycle of the transmission system may be eliminated. The amplitude histogram may be implemented for any signal, and causes of faults, which are not able to be determined by a conventional bit rate classification, may be allocated.

REFERENCES:
patent: 5144642 (1992-09-01), Weinberg et al.
*Mueller, et al., “Application of Amplitude Histograms For Quality of Service Measurements of Optical Channels and Fault Identification,” ECOC98, Sep. 20-24, 1998, Madrid, Spain, pp. 707-708.
*Patent Abstracts of Japan, & JP 10 239214 A, vol. 1998, No. 14, Sep. 11, 1998.
*Shake, et al., “Optical Signal Quality Monitoring Method Based on Optical Sampling,” Electronics Letters, vol. 34, No. 22, Oct. 23, 1998, pp. 2152-2154.
*Atsushi Hiramatsu, “Training Techniques for Neural Network Applications in ATM,” IEEE Service Center, New Jersey, U.S.A., vol. 33, No. 10, Oct. 1, 1995, pp. 58, 63-67.

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