Patent ID: 11901938
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A network node, comprising:
a memory for storing a classification model,
wherein the network node is configured to:
when a fault is detected on an optical link, receive a stored series of samples of a signal representing a power of an optical signal received in an optical module forming part of the optical link; and
perform a classification on the received series of samples, to classify the samples as resulting from one of a plurality of predefined faults, wherein performing the classification comprises determining a match with one of the plurality of predefined faults for one or more of:
a gradient of the power of the optical signal against time;
an amount of power, duration and/or number of temporary increase(s) in the power of the optical signal, following a drop in the power of the optical signal;
an amount of variation of the power, and/or duration, of a plurality of temporary increases in the power of the optical signal, following a drop in the power of the optical signal;
an amount of noise in the power of the optical signal against time;
a final power of the stored series of samples of the optical signal; and
a time for the power of the optical signal to drop to zero or a final power.