Monitoring device and monitoring method

Abstract

Provided is a monitoring device capable of specifying an abnormality occurrence point without requiring much time. The monitoring device is provided with a reception means (1) and a monitoring means (2). The reception means (1) acquires information about variation of the optical power level of a control signal transmitted to a transmission path. When the variation of the optical power level of thecontrol signal does not satisfy a prescribed condition, the monitoring means (2) monitors the transmission path on the basis of back-scattered light of an optical pulse outputted to the transmissionpath.

Description

technical field [0001] The present invention relates to optical communication technology, and more particularly to a technology for monitoring the presence / absence of abnormality in a transmission path. Background technique [0002] With the widespread use of optical communication networks, it has become important to ensure the stability and security of communications. In optical communication networks, communication failures due to damage to optical fibers and decreased security due to eavesdropping known as tapping may occur. For example, tapping by tapping is accomplished by removing the coating from an optical fiber and attaching a listening device to the optical fiber. [0003] To ensure the stability and security of communications, it is important to identify where damage or eavesdropping occurs and respond quickly when the likelihood of damage or eavesdropping on the fiber increases. Therefore, when there is an increased likelihood of damage or eavesdropping occurri...

AI Technical Summary

Problems solved by technology

In optical communication networks, communication failures due to damage to optical fibers and decreased security due to eavesdropping known as tapping can occur

Images