Importance

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Abstract

This application provides an apparatus and method for detecting online failure and a system. The apparatus includes: a reading unit configured to read signal to noise ratios of subcarriers from a receiver of a multicarrier optical communication system according to a predetermined monitoring time interval; a judging unit configured to judge whether there exist a first predetermined number of subcarriers of which the signal to noise ratios are less than a first threshold value; a detecting unit configured to monitor a change of distortion of the system when it is judged yes by the judging unit, and determine a cause of degradation of signal to noise ratios according to the change of distortion of the system; and a reporting unit configured to report degradation of signal to noise ratios and/or the cause of degradation of signal to noise ratios. With the apparatus and method and system provided by this application, changes of distortion of the system may be monitored on line, and the changes possibly posing a threat to normal operation of the system may be early alerted, thereby making it possible to perform targeted adjustment in advance.

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First Claim