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Device and method for positioning branch fault in passive optical access network

A technology for access network and fault location, applied in data exchange network, electromagnetic network arrangement, digital transmission system, etc., can solve the problems of difficult maintenance, inability to distinguish branches, increase maintenance costs, etc., to support the splitting ratio, reduce The effect of difficult maintenance and convenient operation

Active Publication Date: 2016-05-11
WUHAN POST & TELECOMM RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in a PON network with huge branches, what the OTDR receives is the signal after the reflection signals of all branches are superimposed. Difficulty and increased maintenance costs

Method used

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  • Device and method for positioning branch fault in passive optical access network
  • Device and method for positioning branch fault in passive optical access network
  • Device and method for positioning branch fault in passive optical access network

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0035] like figure 1 As shown, the device for branch fault location in the passive optical access network of the present invention includes monitoring modules 1, 1: N splitters / combiners 2 and N wavelength-related reflective element cascade structures 3; monitoring module 1 It also includes a dual light source module 11 , a coupling module 12 , a light receiving module 13 and a data processing module 14 . The dual light source module 11 is used to emit two different wavelengths of probe light; the coupling module 12 is connected to the 1:N splitter / combiner 2 through the optical fiber trunk 4 for link connection; N reflective elements cascaded structure 3 are respectively set on each branch to reflect the detection light on the branch; 1: N splitter / combiner 2 has two functions, one is to divide the detection light into multiple paths on aver...

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Abstract

The invention provides a device and a method for positioning a branch fault in a passive optical access network, and relates to the field of optical fiber communication technology. The device comprises a double optical source module, a 1:N splitter / combiner and N reflective element cascade structures with relevant wavelengths; the double optical source module transmits wavelength probe light into each branch; the probe light is reflected by a reflective element, and a peak graph of reflection peaks of each branch is obtained by the 1:N splitter / combiner, a coupling module, an optical receiving module and a data processing module; the double optical source module transmits another wavelength probe light to obtain the peak graph of the reflection peaks of another group of branches; and the two results are respectively compared with a peak graph in the case of no fault, and the faulty branch is determined according to the distance between the two reflection peaks having the same peak variation amplitude. The device provided by the invention can quickly identify each branch fault in the passive optical access network and realize distance measurement, thereby reducing the maintenance difficulty and lowering the maintenance cost.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a device and a method for locating branch faults in a passive optical access network. Background technique [0002] Passive Optical Network (PON, Passive Optical Network) has low cost, simple maintenance, easy expansion and upgrade, making it a mainstream technology in the access network. With the further commercialization of fiber-to-the-home, the number of laid optical fibers is increasing, the coverage area is wider and wider, and the business volume carried is also increasing. To create a low-cost, large-capacity, and high-reliability passive optical fiber Internet is necessary. [0003] The distribution network of PON is composed of many passive devices, which are susceptible to failure due to the influence of the external environment. At the same time, the branches in PON are huge. If the fault branch cannot be judged in time and accurately, it will not...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04B10/27
CPCH04B10/27H04L41/0677
Inventor 李蔚袁誉星余少华
Owner WUHAN POST & TELECOMM RES INST CO LTD
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