Method and optical line terminal for performing fiber fault diagnosis in passive optical network

Abstract

The invention provides a method and an optical line terminal for performing fiber fault diagnosis in a passive optical network. The method comprises that: a receiving module of the optical line terminal triggers a test module after receiving a fiber fault diagnosis message; the test module performs an optical time-domain reflection test to obtain test data information after being triggered by the receiving module; and a fault diagnosis module analyzes the data information and performs the fiber fault diagnosis. In the method, OTDR technology is applied to the design of the PON OLT, so that the network equipment of the PON has fiber fault diagnosis capacity and the networking structure of a system is simplified.

Description

technical field [0001] The invention relates to the field of optical access networks, in particular to a method for diagnosing optical fiber faults in a passive optical network using OTDR technology and an optical line terminal. Background technique [0002] With the mature development of optical fiber communication technology and the continuous promotion of "triple play" service demand, fiber-to-the-home (FTTH) has undoubtedly become the ultimate means to solve the bandwidth bottleneck problem of the access network, while passive optical network (PON) The technology is favored for its high bandwidth, long-distance transmission, and point-to-multipoint topology, and has become the main application framework for deploying FTTH in various countries. PON is a passive optical access technology that adopts a point-to-multipoint topology. The topology diagram is as follows: figure 1 shown. It consists of OLT (Optical Line Terminal, Optical Line Terminal) on the office side, ONU ...

AI Technical Summary

Problems solved by technology

This method can meet the timeliness and maintainability of fault diagnosis; however, the network structure is complex, and the introduction of optical switches and other equipment also greatly increases the operating cost of the network; at the same time, one OTDR device at the local end tests many PON OLT optical fiber lines, once the instrument fails, it will affect the test of multiple PON networks, and there are hidden dangers in reliability

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