CN112242869A

CN112242869A - Optical fiber fault detection system

Info

Publication number: CN112242869A
Application number: CN201910642689.0A
Authority: CN
Inventors: 毕婕; 王晓义; 宋公建; 王坚; 张满; 付鹏; 殷响; 陈琛; 应鹏
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Zhejiang Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Zhejiang Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2021-01-19

Abstract

The embodiment of the application relates to the technical field of optical communication, and discloses an optical fiber fault detection system, which comprises: the first optical combining unit is arranged between two optical transmission network devices, and one optical fiber between the two optical transmission network devices passes through the first optical combining unit; the first otdr is connected to the first optical combining unit, and is configured to transmit first otdr probe light to the first optical combining unit, where the first otdr probe light and the service light have different wavelengths; the first optical combiner unit is used for adding the first eOTDR probe light into an optical fiber for transmission, receiving reflected light reflected by the first eOTDR probe light after the first eOTDR probe light is transmitted by the optical fiber, and transmitting the reflected light to the first eOTDR; and the first eOTDR is also used for determining whether the optical fiber has a fault according to the reflected light of the first eOTDR detection light. The optical fiber fault detection system can detect the performance of the optical fiber on line in real time, and automatic positioning of the optical fiber fault is achieved.

Description

Optical fiber fault detection system

Technical Field

The embodiment of the application relates to the technical field of optical communication, in particular to an optical fiber fault detection system.

Background

At present, optical fibers are the basis of optical communication transmission networks, and the performance of the fiber core of the optical fibers directly influences the performance of the transmission networks. In the case of comprehensive transmission network faults, the faults caused by fiber breakage and optical fiber quality degradation exceed 65% of the total amount, and the frequent occurrence of the optical fiber faults is difficult to find and process in advance. At present, a means for positioning an Optical fiber fault is that after a maintenance person receives a network management fault report, the maintenance person carries an Optical Time Domain Reflectometer (OTDR) to a field test.

In the prior art, chinese patent publication No. CN103036614B discloses an optical fiber fault analysis method and system, in which the scheme acquires device configuration information, alarm information, and performance information in real time, and determines whether the alarm information of an alarm device is light path alarm related information by acquiring a corresponding relationship between the device and a pipeline, and if so, analyzes and locates an optical fiber fault by using an optical fiber fault analysis rule based on a probabilistic algorithm according to the corresponding relationship between the device and the pipeline. The process specifically comprises the following steps: and analyzing the interruption of the optical path in real time according to the relevant information of the optical path alarm, and then analyzing the interruption of the optical fiber section according to the interruption optical path obtained by analysis. The scheme is based on the monitoring of the traditional OTDR instrument on the optical fiber, and lacks a real-time online positioning function.

In the process of implementing the embodiment of the present application, the inventors found that:

1. when faults such as fiber breakage, fiber attenuation abnormality, connector abnormality and the like occur, the network manager needs to inform the fiber maintenance department to send people to enter the station for testing, and the fault positioning time is long and the efficiency is low;

2. the OTDR instrument test can cause service interruption, does not support service nondestructive test, and does not support on-line, real-time and automatic routing inspection of optical fibers;

3. for the aspect of daily operation and maintenance, the performance and parameter change of the optical fiber cannot be known in advance, the fault is prevented in advance, and the OTDR instrument is expensive and has high measurement cost.

Therefore, the existing OTDR instrument cannot monitor the optical fiber, know the optical fiber performance and parameter variation in advance, and the optical fiber performance cannot be intelligently managed through the network manager, and cannot realize on-line, real-time and automatic inspection of the optical fiber, so that faults such as fiber breakage, attenuation abnormality, connector abnormality and the like cannot be early warned.

Disclosure of Invention

In view of the above, embodiments of the present application provide a method and system for detecting fiber faults, which overcome or at least partially solve the above problems.

According to an aspect of an embodiment of the present application, there is provided an optical fiber fault detection system including: the device comprises a first optical combining unit and a first integrated optical time domain reflectometer (eOTDR), wherein the first optical combining unit is arranged between two optical transmission network devices and is connected with the optical transmission devices through optical fibers;

the first integrated optical time domain reflectometer is connected to the first optical combining unit, and is configured to emit first otdr probe light to the first optical combining unit, where a wavelength of the first otdr probe light is different from a wavelength of the service light;

the first optical combiner unit is configured to add the first otdr probe light to the optical fiber for transmission, receive reflected light reflected back by the first otdr probe light after being transmitted by the optical fiber, and send the emission light of the first otdr probe light to the first integrated optical time domain reflectometer;

the first integrated optical time domain reflectometer is further configured to determine whether the optical fiber is faulty according to the reflected light of the first eodr probe light.

In an optional manner, the optical fiber fault detection system further includes: the optical fiber combiner comprises a second optical combining unit and a second integrated optical time domain reflection tester, wherein the first optical combining unit and the second optical combining unit are connected in series and are arranged at two ends of the optical fiber between two optical transmission network devices, and the optical fiber between the two optical transmission network devices passes through the two optical combining units;

the second integrated optical time domain reflectometer is connected to the second optical combining unit, and is configured to transmit second otdr probe light to the second optical combining unit, where a wavelength of the second otdr probe light is different from a wavelength of the service light;

the second optical combiner unit is configured to add the second otdr probe light to the optical fiber for transmission, receive reflected light reflected by the second otdr probe light after being transmitted by the optical fiber, and send the emission light of the second otdr probe light to the second integrated optical time domain reflectometer;

the second integrated optical time domain reflectometer is further configured to determine whether the second optical fiber is faulty according to the reflected light of the second eodr probe light.

In an optional manner, the first integrated optical time domain reflectometer is further configured to emit a first OSC light to the first optical combining unit;

the first optical combining unit is further configured to add the first OSC light to the optical fiber;

the optical fiber fault detection system further comprises: the optical fiber combiner comprises a second optical combining unit and a second OSC receiver, wherein the first optical combining unit and the second optical combining unit are connected in series and are arranged at two ends of the optical fiber between two optical transmission network devices, and the optical fiber between the two optical transmission network devices passes through the two optical combining units;

the second OSC receiver is connected to the second optical combining unit, and is configured to receive the first OSC light transmitted through the optical fiber and the second optical combining unit.

In an optional manner, the optical fiber fault detection system further includes: a second integrated optical time domain reflectometer;

the second optical combiner unit is further configured to add the second otdr probe light to the optical fiber for transmission, receive reflected light reflected back by the second otdr probe light after being transmitted by the optical fiber, and send the emission light of the second otdr probe light to the second integrated optical time domain reflectometer;

In an optional manner, the second integrated optical time domain reflectometer is further configured to emit a second OSC light to the second optical combining unit;

the second optical combining unit is further configured to add the second OSC light to the optical fiber;

the optical fiber fault detection system further comprises: the first OSC receiver is connected with the first optical combining unit and used for receiving the second OSC light transmitted by the optical fiber and the first optical combining unit.

In an alternative embodiment, the first OSC receiver and the first integrated optical time domain reflectometer are integrated together, and the second OSC receiver and the second integrated optical time domain reflectometer are integrated together, and the first and second OSCs and the first and second otdr probe lights are transmitted through the same optical path.

In an optional manner, the first optical combining unit and the first integrated optical time domain reflectometer are disposed in one of the two optical transmission network devices, and the second optical combining unit and the second integrated optical time domain reflectometer are disposed in the other optical transmission network device.

In an alternative form, the first integrated optical time domain reflectometer includes: the optical module comprises a light source, an optical supervisory channel OSC optical modulation module, an otdr optical modulation module, and an output module, wherein an output end of the light source is respectively connected to an input end of the OSC optical modulation module and an input end of the otdr optical modulation module, an output end of the OSC optical modulation module and an output end of the otdr optical modulation module are respectively connected to an input end of the output module, and an output end of the output module is connected to an input end of the optical combining unit;

the light source is configured to generate light and send the light to the OSC optical modulation module and the eodr optical modulation module;

the OSC light modulation module is used for modulating the light into first OSC light and sending the first OSC light to the output module;

the eodr optical modulation module is configured to modulate the light into the first eodr probe light, and send the first eodr probe light to the output module, where a wavelength of the first eodr probe light is the same as a wavelength of the first OSC light;

the output module is configured to send the first OSC light and the first eodr probe light to the first optical combining unit;

the first optical combining unit is further configured to add the first OSC light to the optical fiber.

In an alternative form, the second integrated optical time domain reflectometer includes: the optical module comprises a light source, an optical supervisory channel OSC optical modulation module, an otdr optical modulation module, and an output module, wherein an output end of the light source is respectively connected to an input end of the OSC optical modulation module and an input end of the otdr optical modulation module, an output end of the OSC optical modulation module and an output end of the otdr optical modulation module are respectively connected to an input end of the output module, and an output end of the output module is connected to an input end of the optical combining unit;

the OSC light modulation module is used for modulating the light into second OSC light and sending the second OSC light to the output module;

the eodr optical modulation module is configured to modulate the light into second eodr probe light, and send the second eodr probe light to the output module, where a wavelength of the second eodr probe light is the same as a wavelength of the second OSC light;

the output module is configured to send the second OSC light and the second eodr probe light to the second optical combining unit;

the second optical combining unit is further configured to add the second OSC light to the optical fiber.

In an optional manner, the second integrated optical time domain reflectometer further includes a switch for controlling the OSC light modulation module to be turned on or off.

The embodiment of the application is characterized in that each optical fiber is provided with an optical fiber fault detection system comprising an optical combining unit and an eOTDR, and the eOTDR detection light is combined into the optical fiber through the optical combining unit, so that the eOTDR can determine whether the optical fiber has a fault according to the reflected light of the eOTDR detection light, detect fiber breaking points, connectors, attenuation points or dirty spots and the like of the optical fiber, perform optical fiber detection in an online and offline mode, perform big data analysis on daily test data of the optical fiber, can be used for optical fiber fault positioning and daily optical fiber operation maintenance, find out optical fiber parameter performance degradation in advance, care and management of the optical fiber, reduce faults caused by the optical fiber, and realize intelligent optical fiber management.

To sum up, the optical fiber fault detection system of the embodiment of the application can carry out online real-time detection on optical fiber performance, realize optical fiber fault automatic positioning, realize optical fiber interruption/degradation point automatic positioning under the condition of uninterrupted service, effectively save optical fiber repair maintenance labor cost, and improve fault repair efficiency.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and the embodiments of the present application can be implemented according to the content of the description in order to make the technical means of the embodiments of the present application more clearly understood, and the detailed description of the present application is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram illustrating an optical fiber fault detection system according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating a fiber fault detection system according to another embodiment of the present application;

FIG. 3 is a schematic diagram illustrating another fiber fault detection system according to another embodiment of the present application;

fig. 4 shows a schematic structural diagram of an otdr according to another embodiment of the present application;

FIG. 5 is a schematic diagram illustrating another fiber fault detection system according to another embodiment of the present application;

fig. 6 is a schematic structural diagram of another optical communication network system according to another embodiment of the present application;

fig. 7 is a schematic structural diagram illustrating a single-ended OTDR detection system for dual fibers of an OTS section according to another embodiment of the present application;

fig. 8 is a schematic structural diagram of another alternative system for performing single-ended OTDR detection on dual fibers of an OTS segment according to another embodiment of the present application;

fig. 9 shows a schematic structural diagram of a system for performing double-ended OTDR detection on two fibers of an OTS segment according to another embodiment of the present application.

Detailed Description

Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Fig. 1 shows a schematic structural diagram of an optical fiber fault detection system according to an embodiment of the present application, which may be embedded in an Optical Transport Network (OTN) device.

The optical fiber fault detection system comprises: a first Optical combining unit 11 and a first integrated Optical Time Domain Reflectometer (otdr) 12, wherein the first Optical combining unit 11 is disposed on an Optical path of an Optical Fiber between two Optical transmission network devices (e.g. two Optical Fiber amplifiers (OA)), and is connected to the Optical transmission devices through the Optical Fiber, for example, one Optical Fiber between the two Optical transmission network devices passes through the first Optical combining unit 11, where the Optical combining unit may also be referred to as an Optical monitoring access/release unit or an Optical Fiber line interface board, and is used to implement combining and splitting of a main Optical channel and an Optical monitoring channel. The optical fiber is used to transmit traffic therethrough, and light used to transmit traffic in the optical fiber is referred to as traffic light.

The first integrated optical time domain reflectometer 12 is connected to the first optical combining unit 11, and is configured to emit first otdr probe light to the first optical combining unit 11, where a wavelength of the first otdr probe light is different from a wavelength of the service light, and directions of the service light and the first otdr probe light may be the same or opposite.

The first optical combiner unit 11 is configured to add the first otdr probe light to the optical fiber for transmission, receive reflected light reflected back by the first otdr probe light after being transmitted by the optical fiber, and send the emission light of the first otdr probe light to the first integrated optical time domain reflectometer 12. The reflected light is optical time domain reflected light, and is generated by Rayleigh scattering and Fresnel reflection when the light is transmitted in the optical fiber.

The first integrated optical time domain reflectometer 12 is further configured to determine whether the optical fiber has a fault according to the reflected light of the first eodr probe light, for example, the fault includes a fiber break point, a connector, a loss point, a dirty spot, or the like. For example, the first integrated optical time domain reflectometer 12 determines whether the optical path is faulty according to the reflected pulse, for example, the first integrated optical time domain reflectometer 12 determines whether the pulse value of the received emitted light of the first otdr probe light meets a threshold or a predetermined function, or the first integrated optical time domain reflectometer 12 stores an optical fiber test curve when the optical path is not faulty, the first integrated optical time domain reflectometer 12 generates an optical fiber test curve according to the reflected pulse, and determines whether the optical fiber test curve when the optical path is not faulty, if the optical fiber test curve meets the threshold, the optical fiber test curve is not faulty, and if the optical fiber test curve does not meet the threshold, the optical fiber test curve is faulty.

The first integrated optical time domain reflectometer 12 is connected to one or more network management devices 13, and the first integrated optical time domain reflectometer 12 is further configured to send an alarm message to the network management device 13, and then the network management device 13 reports the alarm message to a comprehensive alarm platform (not shown) through a northbound interface. The alarm message contains the position information (for example, the position of a Global Positioning System (GPS)) of the fault point, and the obvious reflection peak at the fault point can be determined through a test curve, and the detection result can be compared with the history.

The network management equipment 13 reports the alarm message to the comprehensive alarm platform through the northbound interface, and the comprehensive alarm platform is combined with the production work order system to send the fault work order and the short message to a line of maintenance personnel, so that the whole fault location time is greatly shortened, the emergency repair efficiency is improved, for example, the fault location can be reduced from hour to minute, for example, the fault location can be reduced from 1.5 hours to 5 minutes, and the fault emergency repair is efficiently guided.

The network management equipment 13 of the embodiment of the application can also position the fault to the position map in real time, and automatically and accurately notify maintenance personnel through a work order and a short message.

The optical fiber fault detection system provided by the embodiment of the application can be used for detecting fiber breaking points, connectors, attenuation points or dirty spots of optical fibers and the like, carrying out optical fiber detection in an online and offline mode, carrying out big data analysis on daily test data of the optical fibers, being used for optical fiber fault positioning and daily optical fiber operation maintenance, finding out the performance reduction of optical fiber parameters in advance, nursing and managing the optical fibers, reducing faults caused by the optical fibers and realizing intelligent optical fiber management.

Fig. 2 is a schematic structural diagram of another optical fiber fault detection system according to another embodiment of the present application, where the optical fiber fault detection system includes two optical fiber fault detection devices, and the two optical fiber fault detection devices may be embedded in two optical transmission network devices, respectively.

The two optical fiber failure detection devices have a specific equivalent structure, for example, one optical fiber failure detection device includes: a first optical combining unit 21 and a first otdr23, where the other fiber fault detection apparatus includes a second optical combining unit 22 and a second otdr24, where the first optical combining unit 21 and the second optical combining unit 22 are disposed at two ends of an optical fiber between two optical transmission network devices, that is, the optical fiber between the two optical transmission network devices passes through the first optical combining unit 21 and the second optical combining unit 22, the first otdr23 is connected to the first optical combining unit 21, the second otdr24 is connected to the second optical combining unit 22, and the first otdr23 and the second otdr24 are further connected to one or more network management devices 25, respectively. The optical fiber is used for transmitting the service, and the light used for transmitting the service in the optical fiber is called service light.

In another embodiment of the present application, the first optical combining unit 21 and the first otdr23 are embedded in one of the two optical transmission network devices, and the second optical combining unit 22 and the second otdr24 are embedded in the other of the two optical transmission network devices.

The first otdr23 is configured to emit first otdr probe light to the first optical combining unit 21, where a wavelength of the first otdr probe light is different from a wavelength of the service light, and a direction of the first otdr probe light may be the same as or opposite to the direction of the service light.

The second otdr24 is configured to emit a second otdr probe light to the second optical combining unit 22, where a wavelength of the second otdr probe light is different from a wavelength of the service light, and a direction of the second otdr probe light may be the same as or opposite to the direction of the service light.

In another embodiment of the present application, the wavelength of the first otdr probe light and the wavelength of the second otdr probe light may be the same or different.

The first optical combiner unit 21 is configured to add the first otdr probe light to the optical fiber for transmission, receive reflected light reflected back by the first otdr probe light after being transmitted by the optical fiber, and send the emission light of the first otdr probe light to the first otdr 23.

The first otdr23 is configured to determine whether the optical fiber has a fault according to the reflected light of the first otdr probe light, where a fault determination manner may refer to the fault determination manner described in the foregoing embodiment in fig. 1, and details thereof are not repeated here.

The first eodr 23 is further configured to send an alarm message to the network management device 25, and then the network management device 25 reports the alarm message to a comprehensive alarm platform (not shown) through a northbound interface, where specific content of the alarm message may refer to the alarm message described in the foregoing embodiment of fig. 1, and is not described herein again.

The second optical combiner unit 22 is configured to add the second otdr probe light to the optical fiber for transmission, receive reflected light reflected back by the second otdr probe light after being transmitted by the optical fiber, and send the emission light of the second otdr probe light to the second otdr 24.

The second otdr24 is configured to determine whether the optical fiber has a fault according to the reflected light of the second otdr probe light, where a fault determination manner may refer to the fault determination manner described in the foregoing embodiment in fig. 1, and details are not repeated here.

The second eodr 24 is further configured to send an alarm message of an optical fiber fault to the network management device 25, and then the network management device 25 reports the alarm message to a comprehensive alarm platform (not shown) through a northbound interface, where specific content of the alarm message may refer to the alarm message described in the foregoing embodiment in fig. 1, and is not described herein again.

The optical fiber fault detection device can detect fiber breaking points, connectors, attenuation points or dirty spots of optical fibers and the like, performs optical fiber detection in an online and offline mode, performs big data analysis on daily test data of the optical fibers, can be used for optical fiber fault positioning and daily optical fiber operation maintenance, finds out performance reduction of optical fiber parameters in advance, attends and manages the optical fibers, reduces faults caused by the optical fibers, and achieves intelligent optical fiber management.

To sum up, the optical fiber fault detection device of the embodiment of the application can carry out online real-time detection on optical fiber performance, realizes optical fiber fault automatic positioning, realizes optical fiber interruption/degradation point automatic positioning under the condition of uninterrupted service, effectively saves optical fiber repair maintenance labor cost, and promotes fault repair efficiency.

Fig. 3 is a schematic structural diagram of an optical fiber fault detection system according to another embodiment of the present application, which may be embedded in an optical transmission network device.

The optical fiber fault detection system comprises: a first optical combining unit 31, a second optical combining unit 32, a first OSC transmission and eodr (OSC Tx & eodr) 33, and a first OSC receiver (OSC Rx)34, where the first optical combining unit 31 and the second optical combining unit 32 are disposed at two ends of an optical fiber between two optical transmission network devices, that is, the optical fiber between the two optical transmission network devices passes through the first optical combining unit 31 and the second optical combining unit 32, the first OSC Tx & eodr 33 is connected to the first optical combining unit 31, the first OSC Rx34 is connected to the second optical combining unit 32, and the first OSC Tx & eodr 33 and the first OSC 34 are further connected to one or more network management devices 35, respectively. The optical fiber is used for transmitting the service, and the light used for transmitting the service in the optical fiber is called service light.

In another embodiment of the present application, the first optical combining unit 31 and the first OSC Tx & eodr 33 are embedded in one of the two optical transmission network devices, and the second optical combining unit 32 and the first OSC Rx34 are embedded in the other of the two optical transmission network devices.

The first OSC Tx & eodr 33 is configured to transmit a first Optical Supervisory Channel (OSC) light and a first eodr probe light to the first optical combining unit 31, where the first OSC light is used to detect whether communication has a fault, the first OSC light and the first eodr probe light have the same wavelength but different wavelength from the service light, and the direction of the first OSC light is the same as the direction of the first eodr probe light and may be the same as or opposite to the direction of the service light.

The structure of the first OSC Tx & eodr 33 may be as shown in fig. 4, which is a schematic structural diagram of an eodr in another embodiment of the present application, where the first OSC Tx & eodr 33 includes a light source 331, an OSC optical modulation module 332, an eodr optical modulation module 333, and an output module 334, an output end of the light source 331 is connected to an input end of the OSC optical modulation module 332 and an input end of the eodr optical modulation module 333, an output end of the OSC optical modulation module 332 and an output end of the eodr optical modulation module 333 are connected to an input end of the output module 334, and an output end of the output module 334 is connected to an input end of an optical combining unit.

Therefore, accessing the eodr probe light by using the access supervisory channel (OSC) does not bring extra loss to the power budget of the Optical Transmission Section (OTS) transport traffic.

Light emitted by the light source 331 is modulated by the OSC optical modulation module 332 and the eodr optical modulation module 333 to obtain the first OSC light and the first eodr probe light, where the first OSC light and the first eodr probe light are input to the optical combining unit connected thereto through the output module 334, and the output module 334 transmits the first OSC light and the first eodr probe light through an optical monitoring channel (OSC), where in an optical fiber, an optical monitoring channel (OSC) and a service transmission channel are different, a same light source emits the OSC light and the eodr probe light with a same wavelength and a same direction, but different from a service light for transmitting a service in the optical fiber, and transmission directions of the first OSC light and the first eodr probe light may be the same as or opposite to the service light.

In another embodiment of the present application, to save resources, for example, save power, the first OSC Tx & eOTDR33 further includes a switch 335 for controlling an OSC on and an OSC off, for example, the switch 335 is connected to the OSC optical modulation module 332 for controlling the OSC optical modulation module 332 to be turned on and off.

The first optical combining unit 31 is configured to add the first OSC light and the first otdr probe light into the optical fiber for transmission, receive reflected light reflected back after the first otdr probe light is transmitted by the optical fiber, and send the transmitted light of the first otdr probe light to the first OSC Tx & otdr 33.

The first OSC Tx & eodr 33 is further configured to determine whether the optical fiber has a fault according to the reflected light of the first eodr probe light, and a fault determination method may refer to the fault determination method described in the embodiment of fig. 1, which is not described herein again.

The first eodr 33 is further configured to send an alarm message of an optical fiber fault to the network management device 35, and then the network management device 35 reports the alarm message to a comprehensive alarm platform (not shown) through a northbound interface, where specific content of the alarm message may refer to the alarm message described in the foregoing embodiment in fig. 1, and is not described herein again.

The second optical combining unit 32 is configured to separate the service light and the first OSC light and transmit the first OSC light to the first OSC Rx 34.

The first OSC Rx34 is configured to determine whether communication of the optical fiber is failed according to the first OSC light, for example, whether the communication is in accordance with a preset curve, determine that a communication failure occurs if the communication is not in accordance with the preset curve, and determine that no communication failure occurs if the communication is in accordance with the preset curve.

The first OSC Rx34 is further configured to send a communication failure message to the network management device 35, and then the network management device 35 reports the communication failure message to a comprehensive alarm platform (not shown) through a northbound interface.

Fig. 5 is a schematic structural diagram of another optical fiber fault detection system provided in another embodiment of the present application, which may be embedded in an optical transmission network device.

The optical fiber fault detection system comprises: a first optical combining unit 51, a second optical combining unit 52, a first OSC Tx & eodr 53, and a second OSC receive sum eodr (OSC Rx & eodr) 54, where the first optical combining unit 51 and the second optical combining unit 52 are disposed at two ends of an optical fiber between two optical transmission network devices, that is, the optical fiber between the two optical transmission network devices passes through the first optical combining unit 51 and the second optical combining unit 52, the first OSC Tx & eodr 53 is connected to the first optical combining unit 51, the second Rx & eodr 54 is connected to the second optical combining unit 52, and the first OSC Tx & eodr 53 and the second OSC Rx & eodr 54 are further connected to one or more network management devices 55, respectively. The optical fiber is used for transmitting the service, and the light used for transmitting the service in the optical fiber is called service light.

In another embodiment of the present application, the first optical combining unit 51 and the first OSC Tx & eodr 53 are embedded in one of the two optical transmission network devices, and the second optical combining unit 52 and the second OSC Rx & eodr 54 are embedded in the other of the two optical transmission network devices.

The first OSC Tx & eodr 53 is configured to transmit first OSC light and first eodr probe light to the first optical combining unit 51, where the first OSC light is configured to detect whether a communication failure occurs, the first OSC light and the first eodr probe light have the same wavelength but are different from the wavelength of the service light, and the direction of the first OSC light is the same as the direction of the first eodr probe light and may be the same as or opposite to the direction of the service light.

The structure of the first OSC Tx & eodr 53 may be the structure of the first OSC Tx & eodr 33 as described in fig. 4, and will not be described herein again.

The first optical combining unit 51 is configured to add the first OSC light and the first otdr probe light into the optical fiber for transmission, receive reflected light reflected back after the first otdr probe light is transmitted by the optical fiber, and send the transmission light of the first otdr probe light to the first OSC Tx & otdr 53.

The first OSC Tx & eodr 53 is further configured to determine whether the optical fiber has a fault according to the reflected light of the first eodr probe light, and a fault determination method may refer to the fault determination method described in the embodiment of fig. 1, which is not described herein again.

The first eodr 53 is further configured to send an alarm message of an optical fiber fault to the network management device 55, and then the network management device 55 reports the alarm message to a comprehensive alarm platform (not shown) through a northbound interface, where specific content of the alarm message may refer to the alarm message described in the foregoing embodiment in fig. 1, and is not described herein again.

The second OSC Rx & eodr 54 is configured to emit second eodr probe light to the second optical combining unit 52. In another embodiment of the present application, a wavelength of the second otdr probe light is different from a wavelength of the service light, and a transmission direction of the second otdr probe light may be the same as or opposite to a direction of the service light. In another embodiment of the present application, the wavelengths of the first eodr probe light and the second eodr probe light may be the same or different.

The second optical combining unit 52 is configured to add the second otdr probe light to the optical fiber for transmission, receive reflected light reflected back after the second otdr probe light is transmitted through the optical fiber, send the reflected light of the second otdr probe light to the second OSC Rx & otdr54, separate the service light from the first OSC light, and send the first OSC light to the second OSC Rx & otdr 54.

The second OSC Rx & eodr 54 is further configured to determine whether the optical fiber has a fault according to the reflected light of the second eodr probe light, and a fault determination method may refer to the fault determination method described in the foregoing embodiment of fig. 1, which is not described herein again.

The second OSC Rx & eodr 54 is further configured to determine whether communication of the optical fiber has failed according to the first OSC light, for example, whether the communication of the optical fiber conforms to a preset curve, determine that a communication failure has occurred if the communication failure does not conform to the preset curve, and determine that no communication failure has occurred if the communication failure conforms to the preset curve.

The second OSC Rx & eodr 54 is further configured to send an alarm message of an optical fiber fault and a communication fault message to the network management device 55, and then the network management device 55 reports the communication fault message to a comprehensive alarm platform (not shown) through a northbound interface.

The optical fiber fault detection system described above performs optical fiber fault detection on one optical fiber between two optical transmission network devices, and when two or more optical fibers exist between two optical transmission network devices, the optical fiber fault detection system described in the embodiments of fig. 1 to 3 and fig. 5 may be provided for each optical fiber.

For example, the following embodiments are described by taking an example in which two optical fibers are present between two optical transmission network devices, and the same applies to the case in which three or more optical fibers are present.

Fig. 6 is a schematic structural diagram of another optical communication network system according to another embodiment of the present application, where the optical communication network includes two optical fiber failure detection devices, and the two optical fiber failure detection devices may be embedded in two optical transmission network devices respectively, and the two optical transmission network devices are connected by a first optical fiber and a second optical fiber.

The two optical fiber failure detection devices are in a specific peer-to-peer structure, for example, one optical fiber failure detection device for the first optical fiber includes: a first optical combining unit 61 and a first otdr63, where another fiber fault detection apparatus for a second optical fiber includes a second optical combining unit 62 and a second otdr64, where the first optical combining unit 61 and the second optical combining unit 62 are disposed at two ends of two optical fibers between two optical transmission network devices, that is, the two optical fibers between the two optical transmission network devices pass through the first optical combining unit 61 and the second optical combining unit 62, the first otdr63 is connected to the first optical combining unit 61, the second otdr64 is connected to the second optical combining unit 62, and the first otdr63 and the second otdr64 are further connected to one or more network management devices 25, respectively. The optical fiber is used for transmitting the service, and the light used for transmitting the service in the optical fiber is called service light.

For example, the first otdr63 is configured to emit first otdr probe light to the first optical combining unit 61. The first optical combining unit 61 is configured to add the first otdr probe light into the first optical fiber connected to the first optical combining unit 61, receive reflected light reflected back after the first otdr probe light is transmitted through the first optical fiber, separate the service light from the reflected light of the first otdr probe light, and send the reflected light of the first otdr probe light to the first otdr 63.

The second otdr64 is configured to emit a second otdr probe light to the second optical combining unit 62. The second optical combining unit 62 is configured to add the second otdr probe light into the second optical fiber connected to the second optical combining unit 62, receive reflected light reflected back by the second otdr probe light after being transmitted by the second optical fiber, separate the service light from the reflected light of the second otdr probe light, and send the reflected light of the second otdr probe light to the second otdr 64.

In another embodiment of the present application, light used for transmitting services in an optical fiber is referred to as service light, in the same optical fiber, the wavelength of the service light in the optical fiber is different from the wavelength of the otdr probe light in the optical fiber, and the directions of the service light in the optical fiber and the otdr probe light in the optical fiber may be the same or opposite.

In another embodiment of the present application, the wavelengths of the otdr probe light emitted by each otdr may be different from each other, or may be the same. If the wavelengths of the probe lights emitted by the two eotdrs are the same, when the probe lights emitted by the two eotdrs are respectively used for the optical paths of different optical fibers, the probe lights do not affect each other.

The otdr probe light emitted by each otdr is emitted when being transmitted to a next node (for example, an optical combining unit or an OTN device connected to an optical fiber) through an optical fiber, for example, reflected light generated by rayleigh scattering and fresnel reflection when being transmitted in the optical fiber is used, so that the otdr can detect a fiber break point, a connector, an attenuation point, a dirty point, and the like of the optical fiber, and each otdr judges whether a fault occurs in the optical path according to a pulse reflected back.

For example, the first otdr63 determines whether the pulse value of the received emitted light of the first otdr probe light meets a threshold or a predetermined function, or the first otdr63 stores a fiber test curve when not failed, the first otdr63 generates a fiber test curve according to the pulse reflected by the first otdr probe light, and determines whether the fiber test curve when not failed is met, if so, no fault occurs, and if not, a fault occurs.

For example, the second otdr64 determines whether the pulse value of the received emitted light of the second otdr probe light meets a threshold or a predetermined function, or the second otdr64 stores a fiber test curve when not failed, the second otdr64 generates a fiber test curve according to the pulse reflected by the second otdr probe light, and determines whether the fiber test curve when not failed is met, if so, no fault occurs, and if not, a fault occurs.

The first eodr 63 and the second eodr 64 are both connected to one or more network management devices 65, an eodr that finds the optical path fault sends an alarm message to the network management device 65, and then the network management device 65 reports the alarm message to a comprehensive alarm platform (not shown) through a northbound interface.

In another embodiment of the present application, each otdr may further emit OSC light, and the optical fiber fault detection apparatus and system described with reference to the embodiments of fig. 3 to 5 are not described herein again.

The eodr probe light may be in the same direction or in the opposite direction as the traffic light carrying the traffic. In the same direction, the eOTDR probe light is at the multi-channel Source Main Path Interface Reference Point (MPI-S)_M)/S_MOr receiving a Main light channel Interface Reference Point (MPI-R) by multiple channels_M)/R_MOTS optical fibers are accessed into the nodes; in the reverse direction, the eOTDR probe light is at MPI-R_MOr MPI-R_MAnd an OTS optical fiber is accessed in the node. The same optical fiber can be provided with detection light in two directions or only one-way detection light.

According to the position of the eOTDR detection light accessing the optical fiber, the relationship between the eOTDR detection light and the OSC, and the relationship between the direction of the eOTDR detection light and the service light, there are two main scenarios: and respectively carrying out single-ended OTDR detection on the double fibers of the OTS section and respectively carrying out double-ended OTDR detection on the double fibers of the OTS section.

The system for respectively performing single-ended OTDR detection on double fibers of the OTS section comprises a first OTN device and a second OTN device, wherein service transmission is performed between the first OTN device and the second OTN device through two optical fibers, and for each optical fiber, an optical fiber fault detection system is respectively arranged, namely devices included in the optical fiber fault detection system are embedded in the first OTN device and the second OTN device.

Whether two optical fibers share the optical combining unit on the same OTN device can be divided into two cases, for example, as shown in fig. 7, a schematic structural diagram of a system for performing single-ended OTDR detection on two optical fibers of an OTS section according to another embodiment of the present application is shown.

The first OTN device and the second OTN device are connected by two optical fibers, e.g., a first optical fiber and a second optical fiber.

The optical fiber fault detection system for the first optical fiber includes a first OSC Tx & eodr 71, a first OSC Rx72, a first optical combining unit 75, and a second optical combining unit 76, where the first OSC Tx & eodr 71 and the first optical combining unit 75 are embedded in the first OTN device, and the first OSC Rx72 and the second optical combining unit 76 are embedded in the second OTN device.

Service light enters the first optical fiber through the first optical combining unit 75 embedded in the first OTN device and then reaches the second optical combining unit 76 embedded in the second OTN device.

The first OSC Tx&The first OSC light emitted by the eodr 71 and the first eodr probe light pass through the first optical combining unit 75 and then pass through the MPI-S_M/S_MA node is connected to the first optical fiber, and the first OSC light passes through the first optical fiber and MPI-R_M/R_MEnters the second optical combining unit 76 and then reaches the first OSC Tx 72&The eodr 71 determines whether the first optical fiber has a fault according to the reflected light of the first eodr probe light emitted by the eodr 71, and the specific fault determining manner is as described in the embodiment of fig. 1, which is not described herein again. The first OSC light and the first eodr probe light have the same wavelength but different from the wavelength of the service light, and the direction of the first OSC light is the same as that of the first eodr probe light, and may be the same as or opposite to that of the service light.

The structure of the first OSC Tx & eodr 71 may refer to the structure of the first OSC Tx & eodr 33 described in fig. 4, and thus, will not be described herein again.

The first optical combining unit 75 is configured to add the first OSC light emitted by the first OSC Tx & eodr 71 and the first eodr probe light into the first optical fiber for transmission, receive reflected light reflected back by the first eodr probe light after being transmitted by the first optical fiber, separate the service light from the emitted light of the first eodr probe light, and send the emitted light of the first eodr probe light to the first OSC Tx & eodr 71.

The first OSC Tx & eodr 71 is further configured to determine whether the optical fiber has a fault according to the reflected light of the first eodr probe light, and a fault determination method may refer to the fault determination method described in the embodiment of fig. 1, which is not described herein again.

The first OSC Tx & eodr 71 is further configured to send an alarm message of an optical fiber fault to a network management device, and then the network management device reports the alarm message to a comprehensive alarm platform (not shown) through a northbound interface, where specific content of the alarm message may refer to the alarm message described in the foregoing embodiment in fig. 1, and is not described herein again.

The second optical combining unit 76 is configured to separate the service light and the first OSC light and transmit the first OSC light to the first OSC Rx 72.

The first OSC Rx72 is configured to determine whether communication of the optical fiber is failed according to the first OSC light, for example, whether the communication is in accordance with a preset curve, determine that a communication failure occurs if the communication is not in accordance with the preset curve, and determine that no communication failure occurs if the communication is in accordance with the preset curve.

The first OSC Rx72 is further configured to send a communication failure message to a network management device, and then the network management device reports the communication failure message to a comprehensive alarm platform (not shown) through a northbound interface.

Similarly, another optical fiber fault detection system for the second optical fiber includes a second OSC Tx & eodr 73, a second OSC Rx74, the first optical combining unit 75, and a second optical combining unit 76, where the second OSC Tx & eodr 73 is embedded in the second OTN device, and the second OSC Rx74 is embedded in the first OTN device.

Service light enters the second optical fiber through the second optical combining unit 76 embedded in the second OTN device and then reaches the first optical combining unit 75 embedded in the first OTN device.

The second OSC Tx&The second OSC light emitted from the eodr 73 and the second eodr probe light pass through the second optical combining unit 76 and then pass through the MPI-S_M/S_MA node is connected to the second optical fiber, and the second OSC light passes through the second optical fiber and MPI-R_M/R_MEnters the first optical combining unit 75 and then reaches the second optical combining unitOSC optical receiver 74, the second OSC Tx&The eodr 73 determines whether the second optical fiber has a fault according to the reflected light of the second eodr probe light emitted by the eodr 73, and the specific fault determining manner is as described in the embodiment of fig. 1, which is not described herein again.

In another embodiment of the present application, the second OSC light and the second eodr probe light have the same wavelength, but different from the wavelength of the service light, and the direction of the second OSC light is the same as the direction of the second eodr probe light, and may be the same as or opposite to the direction of the service light. In another embodiment of the present application, the wavelength of the first otdr probe light and the wavelength of the second otdr probe light may be the same or different.

The structure of the second OSC Tx & eodr 73 may refer to the structure of the first OSC Tx & eodr 33 described in fig. 4, and thus, will not be described herein again.

The second optical combining unit 76 is configured to add the second OSC light emitted by the second OSC Tx & eodr 73 and the second eodr probe light into the second optical fiber for transmission, receive reflected light reflected back by the second eodr probe light after being transmitted by the second optical fiber, separate the service light from the emitted light of the second eodr probe light, and send the emitted light of the second eodr probe light to the second OSC & eodr 73.

The second OSC Tx & eodr 73 is further configured to determine whether the optical fiber has a fault according to the reflected light of the second eodr probe light, and a fault determination method may refer to the fault determination method described in the embodiment of fig. 1, which is not described herein again.

The second OSC Tx & eodr 73 is further configured to send an alarm message of an optical fiber fault to a network management device, and then the network management device reports the alarm message to a comprehensive alarm platform (not shown) through a northbound interface, where specific content of the alarm message may refer to the alarm message described in the foregoing embodiment in fig. 1, and is not described herein again.

The first optical combining unit 75 is configured to separate the service light and the second OSC light and transmit the second OSC light to the second OSC Rx 74.

The second OSC Rx74 is configured to determine whether communication of the optical fiber is failed according to the second OSC light, for example, whether the communication is in accordance with a preset curve, determine that a communication failure occurs if the communication is not in accordance with the preset curve, and determine that no communication failure occurs if the communication is in accordance with the preset curve.

The second OSC Rx74 is further configured to send a communication failure message to a network management device, and then the network management device reports the communication failure message to a comprehensive alarm platform (not shown) through a northbound interface.

If two optical combining units are respectively arranged for each optical fiber, the system for performing single-ended OTDR detection on the dual fibers of the OTS segment can be as shown in fig. 8, which is a schematic structural diagram of another system for performing single-ended OTDR detection on the dual fibers of the OTS segment according to another embodiment of the present application, and the structure is basically similar to fig. 7, and the difference is that two optical combining units are arranged on each optical fiber.

The optical fiber fault detection system corresponding to the first optical fiber includes a first OSC Tx & eodr 81, a first OSC optical receiver (OSC Rx)82, a first optical combining unit 85, and a second optical combining unit 86, where the first OSC Tx & eodr 81 and the first optical combining unit 85 are embedded in the first OTN device, and the OSC Rx82 and the second optical combining unit 86 are embedded in the second OTN device.

Service light enters the first optical fiber through the first optical combining unit 85 embedded in the first OTN device and then reaches the second optical combining unit 86 embedded in the second OTN device.

The first OSC Tx&The first OSC light emitted by the eodr 81 and the first eodr probe light pass through the first optical combining unit 85 and then pass through the MPI-S_M/S_MThe node is connected to the first optical fiber, and OSC light passes through the first optical fiber and MPI-R_M/R_MEnters the second optical combining unit 86 and then reaches the first OSC Tx 82&The eodr 81 determines whether the optical path has a fault according to the reflected light of the first eodr probe light emitted by the eodr 81, where a specific fault determination manner is as described in the embodiment of fig. 1, and details thereof are not repeated herein.

In another embodiment of the present application, the first OSC light and the first eodr probe light have the same wavelength, but different from the wavelength of the traffic light, and the direction of the first OSC light is the same as the direction of the first eodr probe light, and may be the same as or opposite to the direction of the traffic light.

Similarly, the optical fiber fault detection system corresponding to the second optical fiber includes a second OSC Tx & eodr 83, a second OSC Rx84, a third optical combining unit 87, and a fourth optical combining unit 88, where the second OSC Tx & eodr 83 and the third optical combining unit 87 are embedded in the second OTN device, and the second OSC Rx84 and the fourth optical combining unit 88 are embedded in the first OTN device.

Service light enters the second optical fiber through the third optical combining unit 87 embedded in the second OTN device and then reaches the fourth optical combining unit 88 embedded in the first OTN device.

The second OSC Tx&The second OSC light emitted from the eodr 83 and the second eodr probe light pass through the third optical combining unit 87 and then pass through the MPI-S_M/S_MA node is connected to the second optical fiber, and the second OSC light passes through the second optical fiber and MPI-R_M/R_MEnters the fourth optical combining unit 88 and then reaches the second OSC Tx optical receiver 84&The eodr 83 determines whether the optical path has a fault according to the reflected light of the second eodr probe light emitted by the eodr 83, where a specific fault determination manner is as described in the embodiment of fig. 1, and details thereof are not repeated herein.

In this embodiment, the structures and the working processes of the two optical fiber fault detection systems are basically similar to those of the optical fiber fault detection system described in the embodiment of fig. 7, and are not described herein again.

Fig. 9 is a schematic structural diagram of a system for performing double-ended OTDR detection on two fibers of an OTS section according to another embodiment of the present application.

The optical fiber fault detection system for the first optical fiber includes a first OSC Tx & eodr 91, a first OSC Rx & eodr 92, a first optical combining unit 95, and a second optical combining unit 96, where the first OSC Tx & eodr 91 and the first optical combining unit 95 are embedded in the first OTN device, and the first OSC Rx & eodr 92 and the second optical combining unit 96 are embedded in the second OTN device.

Service light enters the first optical fiber through the first optical combining unit 95 embedded in the first OTN device and then reaches the second optical combining unit 96 embedded in the second OTN device.

The first OSC Tx&The first OSC light emitted by the eodr 91 and the first eodr probe light pass through the first optical combining unit 95 and then pass through the MPI-S_M/S_MA node is connected to the first optical fiber, and the first OSC light passes through the first optical fiber and MPI-R_M/R_MEnters the second optical combining unit 96 and then reachesThe first OSC Rx&eOTDR92, the first OSC Tx&The eodr 91 determines whether the first optical fiber has a fault according to the reflected light of the first eodr probe light emitted by the eodr 91, and the specific fault determining manner is as described in the embodiment of fig. 1, which is not described herein again.

The structure of the first OSC Tx & eodr 91 may refer to the structure of the first OSC Tx & eodr 33 described in fig. 4, and thus, will not be described herein again.

The first optical combining unit 95 is configured to add the first OSC light emitted by the first OSC Tx & eodr 91 and the first eodr probe light into the first optical fiber for transmission, receive reflected light reflected back by the first eodr probe light after being transmitted by the first optical fiber, separate the service light from the emitted light of the first eodr probe light, and send the emitted light of the first eodr probe light to the first OSC & eodr 91.

The first OSC Tx & eodr 91 is further configured to determine whether the optical fiber has a fault according to the reflected light of the first eodr probe light, and a fault determination manner may refer to the fault determination manner described in the foregoing embodiments of fig. 1 and 5, which is not described herein again.

The first OSC Tx & eodr 91 is further configured to send an alarm message of an optical fiber fault to a network management device, and then the network management device reports the alarm message to a comprehensive alarm platform (not shown) through a northbound interface, where specific content of the alarm message may refer to the alarm message described in the foregoing embodiment in fig. 1, and is not described herein again.

The second optical combining unit 96 is configured to separate the service light and the first OSC light and transmit the first OSC light to the first OSC Rx & eOTDR 92.

The first OSC Rx & eodr 92 is configured to determine whether communication of the optical fiber has a failure according to the first OSC light, for example, whether the communication of the optical fiber conforms to a preset curve, determine that a communication failure has occurred if the communication failure does not conform to the preset curve, and determine that no communication failure has occurred if the communication failure conforms to the preset curve.

The first OSC Rx & eodr 92 is configured to emit second eodr probe light to the second optical combining unit 96. In another embodiment of the present application, a wavelength of the second otdr probe light is different from a wavelength of the service light, and a transmission direction of the second otdr probe light may be the same as or opposite to a direction of the service light. In another embodiment of the present application, the wavelengths of the first eodr probe light and the second eodr probe light may be the same or different.

The second optical combining unit 96 is further configured to add the second otdr probe light to the first optical fiber for transmission, receive reflected light reflected back after the second otdr probe light is transmitted by the first optical fiber, and send the reflected light of the second otdr probe light to the first OSC Rx & otdr 92.

The first OSC Rx & eodr 92 is further configured to determine whether the optical fiber has a fault according to the reflected light of the second eodr probe light, and a fault determination method may refer to the fault determination method described in the foregoing embodiment of fig. 1, which is not described herein again.

The first OSC Rx & eodr 92 is further configured to send an alarm message of an optical fiber fault and a communication fault message to a network management device (not shown), and then the network management device reports the communication fault message to a comprehensive alarm platform (not shown) through a northbound interface.

Similarly, another optical fiber fault detection system for the second optical fiber includes a second OSC Tx & eodr 93, a second OSC Rx & eodr 94, the first optical combining unit 95, and a second optical combining unit 96, where the second OSC Tx & eodr 93 is embedded in the second OTN device, and the second OSC Rx & eodr 94 is embedded in the first OTN device.

Service light enters the second optical fiber through the second optical combining unit 96 embedded in the second OTN device and then reaches the first optical combining unit 95 embedded in the first OTN device.

The second OSC Tx&The third OSC light emitted from the eodr 93 and the third eodr probe light pass through the second optical combining unit 96 and then pass through the MPI-S_M/S_MA node is connected to the second optical fiber, and the third OSC light passes through the second optical fiber and MPI-R_M/R_MEnters the first optical combining unit 95 and then reaches the second OSC Rx&eOTDR94, the second OSC Tx&The eodr 93 determines whether the second optical fiber has a fault according to the reflected light of the third eodr probe light emitted by the eodr 93, and the specific fault determining manner is as described in the embodiment of fig. 1, which is not described herein again.

In another embodiment of the present application, the third OSC light and the third eodr probe light have the same wavelength, but different from the wavelength of the service light, and the direction of the third OSC light is the same as the direction of the third eodr probe light, and may be the same as or opposite to the direction of the service light. In another embodiment of the present application, the wavelengths of the first, second and third otdr probe lights may be the same or different from each other, or two of them may be the same.

The structure of the second OSC Tx & eodr 93 may refer to the structure of the first OSC Tx & eodr 33 described in fig. 4, and thus, will not be described herein again.

The second optical combining unit 96 is configured to add the third OSC light emitted by the second OSC Tx & eOTDR93 and the third eOTDR probe light to the second optical fiber for transmission, receive reflected light reflected back by the third eOTDR probe light after being transmitted by the second optical fiber, separate the service light from the emitted light of the third eOTDR probe light, and send the emitted light of the third eOTDR probe light to the second OSC Tx & eootdr 93.

The second OSC Tx & eodr 93 is further configured to determine whether the optical fiber has a fault according to the reflected light of the third eodr probe light, and a fault determination method may refer to the fault determination method described in the embodiment of fig. 1, which is not described herein again.

The second OSC Tx & eodr 93 is further configured to send an alarm message of an optical fiber fault to a network management device, and then the network management device reports the alarm message to a comprehensive alarm platform (not shown) through a northbound interface, where specific content of the alarm message may refer to the alarm message described in the foregoing embodiment in fig. 1, and is not described herein again.

The first optical combining unit 95 is further configured to separate the service light and the third OSC light and transmit the third OSC light to the second OSC Rx & eOTDR 94.

The second OSC Rx & eodr 94 is further configured to determine whether the communication of the optical fiber has a failure according to the third OSC light, for example, whether the communication of the optical fiber has a failure that matches a preset curve, determine that a communication failure has occurred if the communication failure does not match the preset curve, and determine that no communication failure has occurred if the communication failure matches the preset curve.

The second OSC Rx & eodr 94 is further configured to send a communication fault message to a network management device, and then the network management device reports the communication fault message to a comprehensive alarm platform (not shown) through a northbound interface.

The second OSC Rx & eodr 94 is further configured to emit fourth eodr probe light to the first optical combining unit 95. In another embodiment of the present application, a wavelength of the fourth otdr probe light is different from a wavelength of the service light, and a transmission direction of the fourth otdr probe light may be the same as or opposite to a direction of the service light. In another embodiment of the present application, the first, second, third and fourth otdr probe lights may be the same or different from each other, or at least two of them may be the same.

The first optical combiner unit 95 is further configured to add the fourth eodr probe light to the second optical fiber for transmission, receive reflected light of the fourth eodr probe light reflected back after being transmitted by the second optical fiber, and send the reflected light of the fourth eodr probe light to the second OSC Rx & eodr 94.

The second OSC Rx & eodr 94 is further configured to determine whether the optical fiber has a fault according to the reflected light of the fourth eodr probe light, and a fault determination method may refer to the fault determination method described in the foregoing embodiment of fig. 1, which is not described herein again.

The second OSC Rx & eodr 94 is further configured to send an alarm message of an optical fiber fault and a communication fault message to a network management device (not shown), and then the network management device reports the communication fault message to a comprehensive alarm platform (not shown) through a northbound interface.

In another embodiment of the present application, two optical combining units may also be disposed for each optical fiber, and the structure is basically similar to that in fig. 7, the difference is that two optical combining units are disposed on each optical fiber, and the working process is basically similar to that described in fig. 9, and details are not repeated here.

The algorithms or displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. In addition, embodiments of the present application are not directed to any particular programming language. It will be appreciated that a variety of programming languages may be used to implement the teachings of the present application as described herein, and any descriptions of specific languages are provided above to disclose the best modes of the present application.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the application, various features of the embodiments of the application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the application and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.

Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specified otherwise.

Claims

1. An optical fiber fault detection system, characterized in that the optical fiber fault detection system comprises: the device comprises a first optical combining unit and a first integrated optical time domain reflectometer (eOTDR), wherein the first optical combining unit is arranged between two optical transmission network devices and is connected with the optical transmission devices through optical fibers;

the first integrated optical time domain reflectometer is connected to the first optical combining unit, and is configured to transmit first otdr probe light to the first optical combining unit, where a wavelength of the first otdr probe light is different from a wavelength of service light on the optical fiber;

2. The fiber optic fault detection system of claim 1, further comprising: the first and second optical combining units are connected in series and are arranged at two ends of the optical fiber between the two optical transmission network devices, and the optical fiber between the two optical transmission network devices passes through the second optical combining unit;

3. The fiber optic fault detection system of claim 1, wherein the first integrated optical time domain reflectometry tester is further configured to transmit a first OSC light to the first optical combining unit;

4. The fiber optic fault detection system of claim 3, further comprising: a second integrated optical time domain reflectometer;

5. The fiber optic fault detection system of claim 4, wherein the second integrated optical time domain reflectometry tester is further configured to transmit a second OSC light to the second optical combining unit;

6. The fiber optic fault detection system of claim 5, wherein the first OSC receiver is integrated with the first integrated optical time domain reflectometry tester and the second OSC receiver is integrated with the second integrated optical time domain reflectometry tester to transmit the first and second OSCs and the first and second eOTDR probe light over a same optical path.

7. The optical fiber fault detection system according to any one of claims 2 and 4 to 6, wherein the first optical combining unit and the first integrated optical time domain reflectometer are disposed in one of the two optical transmission network devices, and the second optical combining unit and the second integrated optical time domain reflectometer are disposed in the other optical transmission network device.

8. The fiber optic fault detection system of any of claims 3-6, wherein the first integrated optical time domain reflectometry instrument comprises: the optical module comprises a light source, an optical supervisory channel OSC optical modulation module, an otdr optical modulation module, and an output module, wherein an output end of the light source is respectively connected to an input end of the OSC optical modulation module and an input end of the otdr optical modulation module, an output end of the OSC optical modulation module and an output end of the otdr optical modulation module are respectively connected to an input end of the output module, and an output end of the output module is connected to an input end of the optical combining unit;

9. The fiber optic fault detection system of claims 5 or 6, wherein the second integrated optical time domain reflectometry tester comprises: the optical module comprises a light source, an optical supervisory channel OSC optical modulation module, an otdr optical modulation module, and an output module, wherein an output end of the light source is respectively connected to an input end of the OSC optical modulation module and an input end of the otdr optical modulation module, an output end of the OSC optical modulation module and an output end of the otdr optical modulation module are respectively connected to an input end of the output module, and an output end of the output module is connected to an input end of the optical combining unit;

10. The fiber optic fault detection system of claim 8, wherein the second integrated optical time domain reflectometer further comprises a switch for controlling the OSC optical modulation module on or off.