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On-line accurate measurement method of optical link loss in pon network

A technology for precise measurement and optical links, applied in electrical components, electromagnetic wave transmission systems, transmission systems, etc., can solve problems that cannot be used to judge the quality of optical fiber network links, improve quality management and quality control capabilities, and reduce external influences factors, the effect of improving calibration efficiency

Active Publication Date: 2019-03-15
SHANDONG SENTER ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It cannot be used as a standard and basis for judging the quality of optical fiber network links

Method used

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  • On-line accurate measurement method of optical link loss in pon network
  • On-line accurate measurement method of optical link loss in pon network
  • On-line accurate measurement method of optical link loss in pon network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] figure 2 Among them, 2a indicates the collection of downlink light and information flow, and 2b shows the collection of uplink light and information flow, such as figure 2 Taking the downstream light as shown in middle 2a as an example, the PON network optical link loss online accurate measurement method of the present invention includes the following steps:

[0071] The first step is to accurately measure the optical transmit power value of the downlink service of the OLT at a certain moment during the operation of the PON network, that is, to record the accurate input optical power of the OLT optical node, and at the same time, each optical node ONU under the OLT measures the reception of the corresponding downlink service light. power value;

[0072] In the second step, the optical transmit power value of the OLT downlink service and the downlink optical receive power value measured by the ONU of each optical node are collected together through the PON network ser...

Embodiment 2

[0111] Such as figure 2 and Figure 5 As shown, taking the upstream light as an example, the online accurate measurement method for the PON network optical link loss described in this embodiment includes the following steps:

[0112] The first step is to accurately measure the optical transmit power value of the ONU uplink service at a certain moment during the operation of the PON network, that is, to record the accurate optical power of the ONU optical node entering the fiber; at the same time, the OLT measures Corresponding uplink service optical receiving power;

[0113] In the second step, the PON network service brings together the optical transmit power value of the ONU uplink service and the corresponding uplink service optical receive power value measured by the OLT in the time gap of the ONU's uplink service frame at this time;

[0114] The third step is to subtract the optical transmit power value of the ONU uplink service from the corresponding uplink service op...

Embodiment 3

[0120] In this embodiment, the real-time online output optical sampling module and the real-time online input optical sampling module can also share a bidirectional optical splitter, and the output ends of the bidirectional optical splitter are respectively connected to the built-in optical power meter I and the built-in optical power meter II. One input end of the bidirectional optical splitter is connected to the optical calibration interface, and the other input end is connected to the optical adjustment module. The built-in optical power meter I and the built-in optical power meter II are respectively connected to the central control unit. The difference between this scheme and the previous scheme is that it can The online output optical sampling module and the real-time online input optical sampling module share a bidirectional optical splitter.

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Abstract

The present invention belongs to the field of PON optical network optical link quality evaluation and monitoring, and concretely relates to a PON network optical link loss online accurate measurement method. The method comprises a step of precisely measuring an ONU uplink service optical emitting power at a certain time in a PON network running process, and recording the accurate launching power of an ONU optical node, a step of measuring the corresponding uplink service optical receiving power by an OLT in the ONU uplink service frame time slot at that time, a step of aggregating all measurement values together through PON data services, a step of subtracting the ONU uplink service optical emitting power value by the corresponding uplink service optical receiving power measured by the OLT in the ONU uplink service frame time slot at that time to obtain a difference which is the link loss of two optical nodes at that time in the optical network topology. According to the invention, the service of the PON network is used to realize the optical link loss online accurate measurement of optical network each node, and the operation quality and the management quality of the optical network are improved greatly.

Description

technical field [0001] The invention belongs to the field of PON optical network optical link quality evaluation and monitoring, and in particular relates to an online accurate measurement method for PON network optical link loss. Background technique [0002] Optical network optical link loss refers to the loss of the optical path between two nodes of the optical network. These losses include the loss introduced by optical fibers and passive optical devices; the loss introduced by optical fibers includes the attenuation loss of the optical fiber itself (by the decision); the losses introduced by optical passive devices mainly include: optical splitter loss, live joints, optical cable joints, flanges, etc.; optical link loss is the most basic and important in the design, construction acceptance, and actual operation of optical networks. technical indicators. [0003] The classic optical link loss is to use the optical power source method, such as figure 1 , the optical pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/079
CPCH04B10/0795
Inventor 张海峰蔡富东李全用刘在平张晓宇王景吕昌峰崔利
Owner SHANDONG SENTER ELECTRONICS
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