WO2017206371A1

WO2017206371A1 - Optical fiber network fault detection method, device, and system

Info

Publication number: WO2017206371A1
Application number: PCT/CN2016/096232
Authority: WO
Inventors: 王冰玉
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-05-31
Filing date: 2016-08-22
Publication date: 2017-12-07

Abstract

An optical fiber network fault detection method, device, and system. The method comprises: transmitting a first optical signal to an optical fiber link and obtaining information returned from the optical fiber link, the optical fiber link being provided with one or more optical fiber reflectors used for dividing the optical fiber link into different regions, each optical fiber reflector being configured to: reflect a second optical signal of a predetermined wavelength and transparent-transmit a third optical signal of an another wavelength, the wavelength of the first optical signal comprising: one or more of the wavelengths of the second optical signals that can be reflected by the one or more optical fiber reflectors, and the information returned from the optical fiber link comprising: the wavelength of the reflected second optical signal; and performing fault detection on the optical fiber link according to the information returned from the optical fiber link, the wavelength of the reflected second optical signal being used for determining a region divided by the optical fiber reflector and corresponding to the wavelength.

Description

Optical fiber network fault detection method, device and system

Technical field

This application relates to, but is not limited to, the field of communication device technology.

Background technique

In recent years, with the increasing number of broadband value-added services, users are increasingly demanding bandwidth. Fiber To The Home (FTTH) broadband access solution adopts xPON (Passive Optical Network) technology, which has high bandwidth, anti-interference, easy expansion and long access distance compared with other technologies. And so on, so the xPON technology is widely used. Moreover, FTTH is considered by industry experts to be the most ideal access method in the future. However, the most serious problem of FTTH is that multiple operators are engaged in FTTH access, causing serious repetitive construction and inconvenience to users. . Therefore, in the related art, the operation and maintenance mode of the FTTH adopts a mode of a residential network, and the customer premises network specifically refers to a related network facility from a customer premises concentration point to a user terminal, and may be, for example, a residential area or a building or phase. The adjacent office buildings, that is, the operators can enter the community or the corridor, and the property will build the fiber-to-the-home in the community. The communication facilities in the cell are public, and the user chooses which service to connect to. In this way, the repeated construction of the fiber access can be avoided, so that the user can truly select the services of different operators, and at the same time, the operator can better improve the network quality and improve the service.

As a result, the service guarantee problem of the FTTH broadband access system of the residential network operation and maintenance mode has become increasingly prominent. Among them, the monitoring and fault location of massive optical fiber has become a difficult point. Since operators and properties are responsible for the operation and maintenance of different fiber networks, they urgently need intelligent systems to accurately locate the location of the fiber network fault point and whether the fault point occurs on the operator side or the property side, so that both sides can troubleshoot the problem. Since the Optical Time Domain Reflectometer (OTDR) technology has the ability to accurately locate fiber fault points, it has been favored by operators.

The OTDR fault location scheme in the related art is: when the fiber link is normal, a set of test parameters are used for OTDR test to build a health library; when the link fails, the same test parameter is used for OTDR test, and the fault test is obtained. As a result, the fault test results are compared with the health database, and the OTDR fault location method in the related art is used: if there are new, disappearing events, or the same Some attributes of the location event (such as return loss, insertion loss, and reflection peak) are greater than the threshold, resulting in the location of the fault point. Although this method can accurately locate the location of a fault point on the fiber network, it cannot be distinguished whether the fault point is the operator side or the property side.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

This paper provides a fiber network fault detection method, device and system to solve the problem in the related art that the fault location on the fiber link cannot be located.

A fiber network fault detection method includes:

Transmitting a first optical signal to a fiber optic link and acquiring information returned by the fiber optic link; wherein the fiber optic link is provided with one or more fiber optic reflectors that divide the fiber optic link into different regions Each of the fiber optic reflectors is configured to: reflect a second optical signal of a predetermined wavelength, and transparently transmit a third optical signal of other wavelengths than the predetermined wavelength, wherein the second optical signal reflected by the different optical fiber transmitters Different wavelengths, the wavelength of the first optical signal transmitted includes one or more of wavelengths of the second optical signal that the one or more fiber optic reflectors can reflect, information returned by the fiber link Including: a wavelength of a second optical signal that is reflected;

Performing fault detection of the fiber link according to the information returned by the fiber link, wherein a wavelength of the reflected second optical signal is used to determine a region defined by the fiber reflector corresponding to the current wavelength.

Optionally, when the plurality of fiber optic reflectors are multiple, the transmitting the first optical signal to the optical fiber link includes:

A first optical signal of a different wavelength is sequentially transmitted to the fiber optic link, the different wavelength being a wavelength of a second optical signal that each of the fiber optic reflectors can reflect.

Optionally, the information returned by the optical fiber link further includes: first event information corresponding to a wavelength of the reflected second optical signal, where the optical fiber link is performed according to information returned by the optical fiber link. Fault detection, including:

Obtaining second event information corresponding to a wavelength of the first optical signal, wherein the second event The piece of information is event information returned by the fiber link obtained by transmitting the first optical signal of the wavelength to the fiber link when the fiber link is not faulty;

Comparing the second event information with the first event information to determine whether there is a fault point;

When it is determined that there is a fault point, it is determined that the region determined by the wavelength of the reflected second optical signal is a fault region.

Optionally, the determining the area determined by the wavelength of the reflected second optical signal is a fault area, including:

When the area determined by the wavelength of the reflected second optical signal is an operator area, determining that the fault point is located in the operator area, the fault area includes the operator area;

When the area determined by the wavelength of the reflected second optical signal is an optical network unit user area, determining that the fault point is located in the optical network unit user area, where the fault area includes the optical network unit user area .

A fiber network fault detecting device includes:

a transmitting module, configured to: transmit a first optical signal to the optical fiber link, and acquire information returned by the optical fiber link; wherein the optical fiber link is provided with one that divides the optical fiber link into different regions Or a plurality of fiber optic reflectors, each of the fiber optic reflectors configured to: reflect a second optical signal of a predetermined wavelength and transparently transmit a third optical signal of other wavelengths than the predetermined wavelength, wherein different fiber optic transmitters The wavelength of the reflected second optical signal is different, and the wavelength of the first optical signal emitted by the transmitting module comprises: one or more of wavelengths of the second optical signal that the one or more fiber optic reflectors can reflect The information returned by the fiber link includes: a wavelength of a second optical signal that is reflected;

The detecting module is configured to: perform fault detection of the optical fiber link according to the information returned by the optical fiber link acquired by the transmitting module, where a wavelength of the reflected second optical signal is used to determine a corresponding wavelength The area defined by the fiber optic reflector.

Optionally, the transmitting module is configured to:

When there are a plurality of fiber optic reflectors, first optical signals of different wavelengths are sequentially transmitted to the fiber optic links, the different wavelengths being wavelengths of second optical signals that each of the fiber optic reflectors can reflect.

A fiber network fault detection system comprising: the one or more fiber optic reflectors and detection Equipment, where

The one or more fiber optic reflectors are disposed on the fiber link to divide the fiber link into different regions, and each of the fiber optic reflectors is configured to: reflect a second optical signal of a predetermined wavelength, and transparently transmit a third optical signal of other wavelengths than the predetermined wavelength, wherein wavelengths of the second optical signals reflected by different fiber optic transmitters are different;

The detecting device is configured to: transmit a first optical signal to the optical fiber link, and acquire information returned by the optical fiber link, where the wavelength of the first optical signal that is transmitted includes: the one or more One or more of the wavelengths of the second optical signal that the fiber optic reflector is capable of, and the information returned by the fiber optic link includes: a wavelength of the second optical signal that is reflected;

The detecting device is further configured to: perform fault detection of the optical fiber link according to information returned by the optical fiber link, where a wavelength of the reflected second optical signal is used to determine a fiber reflection corresponding to the current wavelength The area divided by the device.

Optionally, when there are a plurality of fiber optic reflectors, at least one of the plurality of fiber optic reflectors is disposed on a carrier side of the fiber optic link, and at least one of the plurality of fiber optic reflectors is disposed at The user side of the optical network unit on the fiber link, the plurality of fiber optic reflectors divide the fiber link into an operator area and an optical network unit user area;

When the fiber optic reflector is one, the fiber optic reflector is disposed on a carrier side or an optical network unit user side on the fiber link, and the fiber optic reflector divides the fiber link into a carrier area And the non-operator area, or the optical fiber link is divided into an optical network unit user area and a non-optical network unit user area.

Optionally, when the plurality of fiber optic reflectors are multiple, the detecting device is configured to transmit the first optical signal to the fiber optic link, including:

Optionally, the information returned by the optical fiber link further includes: first event information corresponding to a wavelength of the reflected second optical signal, where the detecting device is configured to return information according to the optical fiber link. Performing fault detection of the fiber link, including:

The optical fiber network fault detection method, device and system provided by the embodiments of the present invention, by providing one or more fiber optic reflectors on the fiber link, the one or more fiber optic reflectors dividing the fiber link into different regions, each The fiber optic reflector reflects a second optical signal of a predetermined wavelength and transmits the third optical signal of the other wavelength, so that the detecting device transmits the first optical signal to the optical fiber link, and detects according to the information returned by the acquired optical fiber link. In the event of a fault, the area of the second optical signal that is reflected in the returned information may be determined by determining the area of the fiber-optic reflector corresponding to the wavelength, that is, the area where the fault occurs, thereby solving the problem that the fiber chain cannot be located in the related art. The problem with the area where the fault is on the road.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a schematic structural diagram of a fiber network fault detection system according to an embodiment of the present invention;

2 is a schematic structural diagram of another optical network fault detection system according to an embodiment of the present invention;

3 is a flowchart of a working principle of a fiber network fault detection system according to an embodiment of the present invention;

4 is a flowchart of a fiber network fault detection method according to an embodiment of the present invention;

FIG. 5 is a flowchart of another optical network fault detection method according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a fiber network fault detecting apparatus according to an embodiment of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments herein may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system in accordance with a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

The terms "first", "second" and the like in the description and the claims and the drawings are intended to distinguish similar objects, and are not necessarily used to describe a particular order or order.

In the embodiment of the present invention, a fiber network fault detection system is provided. The fiber network fault detection system described in the following embodiments may be implemented in software, or a combination of software and hardware.

FIG. 1 is a schematic structural diagram of a fiber network fault detection system according to an embodiment of the present invention. As shown in FIG. 1 , the fiber network fault detection system provided in this embodiment includes: one or more fiber optic reflectors 11 and detection devices. 12.

The one or more fiber optic reflectors 11 are disposed on the fiber link to divide the fiber link into different regions, and each fiber optic reflector is configured to: reflect a second optical signal of a predetermined wavelength, and transparently transmit the optical signal A third optical signal of other wavelengths outside the predetermined wavelength, wherein the wavelengths of the second optical signals reflected by the different fiber optic transmitters are different.

The detecting device 12 is configured to: transmit a first optical signal to the optical fiber link, and acquire information returned by the optical fiber link, where the wavelength of the first optical signal that is transmitted includes: one or more optical fiber reflectors 11 capable of reflecting The one or more of the wavelengths of the two optical signals, the information returned by the optical fiber link includes: a wavelength of the second optical signal that is reflected;

The detecting device 12 is further configured to perform fault detection of the optical fiber link according to the information returned by the optical fiber link, wherein the wavelength of the reflected second optical signal is used to determine the area defined by the optical fiber reflector corresponding to the current wavelength.

The optical network fault detection system provided by the embodiment of the present invention, by providing one or more fiber optic reflectors on the fiber link, the one or more fiber optic reflectors divide the fiber links into different regions, each fiber optic reflector Reflecting a second optical signal of a predetermined wavelength and transmitting a third optical signal of other wavelengths, so that when the detecting device transmits the first optical signal to the optical fiber link and detects the fault according to the information returned by the acquired optical fiber link, Determining the area of the fiber-optic reflector corresponding to the wavelength according to the wavelength of the second optical signal that is reflected in the returned information, that is, determining the area where the fault occurs, thereby solving the problem that the fault cannot be located on the fiber link in the related art. The problem of the area.

Optionally, in the embodiment of the present invention, the area divided by the one or more fiber optic reflectors 11 may be an area belonging to different responsible parties, and different responsible parties may include an operator and an optical network unit (Optical Network Unit). , referred to as: ONU) user cell.

The detecting device in the embodiment of the present invention may be an Optical Time Domain Reflectometer (OTDR).

Embodiments of the Invention In practical applications, an optical device, such as a fiber optic reflector, can be installed and deployed in a fiber optic network, such as on a fiber optic link. A fiber optic reflector, also known as a fiber grating termination filter, when the OTDR emits a first optical signal of a certain wavelength to a reflector mounted on the optical fiber link, if the wavelength is at a reflection wavelength inherent to the fiber optic reflector (ie, the above predetermined At the wavelength, the fiber optic reflector reflects the second optical information back; otherwise, the fiber optic reflector transmits the first optical signal transparently.

Optionally, in an application scenario of the embodiment of the present invention, when there are multiple fiber reflectors, at least one of the plurality of fiber reflectors is disposed on a carrier side of the fiber link, and multiple fiber reflections are performed. At least one of the devices is disposed on the user side of the optical network unit on the fiber link, and the plurality of fiber reflectors can divide the fiber link into a carrier area and an optical network unit user area.

Optionally, in another application scenario of the present embodiment, when the fiber optic reflector is one, the fiber optic reflector may be disposed on the operator side of the fiber link or the user side of the optical network unit. When the fiber optic reflector is disposed on the operator side of the fiber link, the fiber optic reflector divides the fiber link into a carrier area and a non-operator area; when the fiber optic reflector is disposed on the optical network unit user side of the fiber link The fiber optic reflector divides the fiber link into an optical network unit user area and a non-optical network unit user area.

For example, in the embodiment of the present invention, the detecting device 12 may separately deploy the reflection chips of the two inherent wavelengths λ1 and λ2 at the operator service concentration point (ie, the operator side described above) and the ONU user side. When the OTDR test is performed using the test parameters of the λ1 wavelength, there will be a strong reflection event at the reflection sheet of the λ1 wavelength, and there is no event at the reflection sheet of the λ2 wavelength, and vice versa; by the physical characteristics of the reflector, the failure can be determined. Point on the operator side or on the property side.

Through the embodiments of the present invention, the fiber link can be divided into a carrier area and an optical network unit user area by using a fiber optic reflector.

Optionally, in the embodiment of the present invention, in the case that the number of the fiber optic reflectors 11 is multiple, the detection device The device 12 is configured to transmit the first optical signal to the optical fiber link, including: when receiving the fault detection request of the optical fiber link, sequentially transmitting the first optical signal of different wavelengths to the optical fiber link, and the different wavelengths are each optical fiber. The wavelength of the second optical signal that the reflector is capable of reflecting.

Optionally, in the embodiment of the present invention, the information returned by the optical fiber link further includes: first event information corresponding to a wavelength of the reflected second optical signal, where the detecting device 12 is configured to return according to the optical fiber link. And performing the fault detection of the optical fiber link, comprising: acquiring second event information corresponding to a wavelength of the first optical signal, where the second event information is sent to the optical fiber link when the optical fiber link does not fail. The event information returned by the fiber link acquired by the first optical signal of the wavelength; comparing the second event information with the first event information to determine whether there is a fault point; and determining that the fault point exists, determining the second light that is reflected The area determined by the wavelength of the signal is the fault area.

Optionally, the detecting device in the embodiment of the present invention may be an optical time domain reflectometer.

2 is a schematic structural diagram of another optical network fault detection system according to an embodiment of the present invention. Shown in Figure 2 is the deployment of a fiber optic reflector topology. As shown in FIG. 2, the optical network fault detection system includes: an Optical Line Terminal (OLT: OLT) 201 downlink detection device (ie, OTDR 203). In this embodiment, there are two fiber reflectors, first. The fiber optic reflector 207 is deployed on the operator side, and the second fiber optic reflector 208 is disposed on the ONU 209 side. The wavelength of the service optical signal is λd. The OTDR 203 is first tested using the λ1 wavelength, and is deployed in the operation through the multi-stage splitter 205. After the first fiber optic reflector 207 of the λ1 inherent wavelength on the quotient side, the test light signal of the λ1 wavelength is totally reflected back. The OTDR 203 is further tested using the λ2 wavelength. After passing through the first fiber reflector 207 of the λ1 inherent wavelength on the operator side, the λ2 wavelength test optical signal is transmitted through the second fiber reflector 208 of the λ2 inherent wavelength of the ONU 209 side. The test light signal of the λ2 wavelength is totally reflected back.

In practical applications, when the optical network is normal, the OTDR 203 tests the fiber link using appropriate test parameters (such as optical wavelength, pulse width, test distance, optical refractive index, test duration, etc.) to obtain a health test result file; When the optical network is abnormal, the OTDR 203 tests the faulty link with appropriate test parameters to obtain a fault test result file. Analyze the OTDR203 test result file, and obtain the event list and performance index parameters of each event such as: event type, location, insertion loss, return loss, reflection peak, etc.; compare the fault test result with the health library, and obtain the fault location algorithm according to the fault location algorithm The location of the fault point.

The implementation manner of the foregoing embodiment of the present invention is described in detail below with reference to FIG. 3, as shown in FIG. A working principle flow chart of a fiber network fault detection system provided by an embodiment of the invention. The method for testing the dual wavelength of the OTDR 203 in the above embodiment of the present invention may include the following steps, namely, S301 to S310:

S301, the operator side deploys a first fiber optic reflector of λ1 wavelength, and the ONU user side deploys a second fiber optic reflector of λ2 wavelength.

In this embodiment, the fiber reflection sheets of the two wavelengths λ1 and λ2 are respectively deployed at the operator service concentration point and the ONU user side.

S302: When the fiber link is normal, the λ1 and λ2 wavelengths are sequentially used as test parameters for the health library test.

Wherein, when the optical fiber link is normal, the two wavelengths λ1 and λ2 are sequentially used as test parameters for the health database test, and the data processing module is called to obtain two health database data, wherein the health database data includes the above embodiment. The second event information.

In practical applications, two test result files of two wavelengths λ1 and λ2 are parsed to obtain two health event lists, and the event list includes performance indicators of each event such as event position, type, insertion loss, return loss, reflection peak, and the like. . Save it in the database as a health library.

S303: When the optical fiber link is abnormal, the λ1 and λ2 wavelengths are sequentially used as test parameters for fault testing.

Wherein, when the optical fiber link is abnormal, the two wavelengths λ1 and λ2 are sequentially used as test parameters for fault testing, and the data processing module is called, and two test result files are parsed to obtain two fault event lists, and the obtained event list is The first event information in the above embodiment is invented.

S304, comparing the fault event list of the λ1 wavelength with the health event list of the λ1 wavelength.

S305. Determine whether there is a fault point.

If there is a fault point, S307 is performed; if there is no fault point, S306 is performed.

In practical applications, the fault detection algorithm in the related technology of the λ1 wavelength and the health data can be respectively called, and if there is a fault point, it can be determined that the operator side fault is obtained and the exact fault point position is obtained; if there is no fault, the continuation is continued. The fault location algorithm in the related art of the λ2 wavelength fault test data and the λ2 wavelength health data can be determined to be a property side fault and obtain a precise fault point position if there is a fault.

S307, determining that the fault point is on the operator side, and giving a precise fault point position.

S306, comparing the fault event list of λ2 wavelength with the health event list of λ2 wavelength.

S308, determining whether there is a fault point.

If there is a fault point, S309 is performed; if there is no fault point, S310 is performed.

S309, determining that the fault point is on the ONU user side, and giving a precise fault point position.

S310, determining that there is no fault.

In practical applications, comparing the fault event list of λ2 wavelength with the health event list of λ2 wavelength, and calling the fault location algorithm in the related art, if there is a fault point, it can be determined that the fault is after the λ1 reflector, that is, ONU The user side fails and gets the exact point of failure and the process ends.

Optionally, in this embodiment, since there is only an event before the λ1 reflection sheet in the λ1 wavelength event list, there is no event after the λ1 reflection sheet, so if the fault location algorithm in the related technology is called, if there is a fault The point can be determined as the fault before the λ1 reflector, that is, the operator side fault, and the exact fault point position is obtained; if there is no fault, it indicates that there is no fault before the λ1 reflector.

The technical solution provided by the embodiment of the present invention solves the problem that the fault location method in the OTDR calling related technology cannot accurately locate the fault point and determine the fault in the scenario of the FTTH broadband access operator and the property independent operation and maintenance optical fiber network. Point to the issue of the responsible party. The embodiment of the invention realizes that the network service guarantee is changed from manual and on-site processing to intelligent and remote processing, and provides a fast real-time fault handling mechanism, and the entire process is automatically executed to assist maintenance personnel to quickly eliminate optical network faults. When a fault occurs, the fault location is accurately located, which greatly improves the troubleshooting efficiency and improves the network service guarantee efficiency. It is beneficial to reduce the probability of network failure, shorten the fault handling and recovery time, and save a lot of manpower and material resources for network operation and maintenance.

Embodiments of the present invention can operate on the fiber network fault detection system shown in FIGS. 1 and 2.

In the embodiment, a method for operating the fiber network fault detection system is provided. FIG. 4 is a flowchart of a fiber network fault detection method according to an embodiment of the present invention. As shown in FIG. 4, the embodiment provides The method may include the following steps, namely, S410 to S420:

S410. The first optical signal is sent to the optical fiber link, and the information returned by the optical fiber link is obtained. The optical fiber link is provided with one or more optical fiber reflections that divide the optical fiber link into different areas. Each of the fiber optic reflectors is configured to: reflect a second optical signal of a predetermined wavelength, and transparently transmit a third optical signal of a wavelength other than the predetermined wavelength, and different wavelengths of the second optical signals reflected by different optical fiber transmitters are different, The wavelength of the transmitted first optical signal includes one or more of wavelengths of the second optical signal that the one or more fiber optic reflectors can reflect. The information returned by the fiber link includes: the second light that is reflected. The wavelength of the signal.

S420: Perform fault detection of the optical fiber link according to the information returned by the optical fiber link, where a wavelength of the reflected second optical signal is used to determine an area defined by the optical fiber reflector corresponding to the current wavelength.

A method for detecting a fault in a fiber network according to an embodiment of the present invention, by disposing one or more fiber reflectors on a fiber link, the one or more fiber reflectors dividing the fiber link into different regions, each fiber reflector Reflecting a second optical signal of a predetermined wavelength and transmitting a third optical signal of other wavelengths, so that when the detecting device transmits the first optical signal to the optical fiber link and detects the fault according to the information returned by the acquired optical fiber link, Determining the area of the fiber-optic reflector corresponding to the wavelength according to the wavelength of the second optical signal that is reflected in the returned information, that is, determining the area where the fault occurs, thereby solving the problem that the fault cannot be located on the fiber link in the related art. The problem of the area.

Optionally, in the embodiment of the present invention, the area defined by the fiber optic reflector may be an area belonging to different responsible parties, and different responsible parties may include an operator, a fiber network unit user cell.

The execution body in the embodiment shown in FIG. 4 may be a detection device, which may be an optical time domain reflectometer (OTDR). In practical applications, a light may be installed and deployed in a fiber network (such as a fiber link). Devices such as fiber optic reflectors. A fiber optic reflector, also known as a fiber grating termination filter, when the OTDR emits a first optical signal of a certain wavelength to a reflector mounted on the optical fiber link, if the wavelength is at a reflection wavelength inherent to the fiber optic reflector (ie, the above predetermined At the wavelength, the fiber optic reflector reflects the second optical information back; otherwise, the fiber optic reflector transmits the first optical signal transparently.

Optionally, in an application scenario of the embodiment of the present invention, that is, when there are multiple fiber optic reflectors, the implementation of the optical signal to the optical fiber link may be implemented in the case that the optical fiber link is faulty. The first optical signals of different wavelengths are sequentially transmitted to the optical fiber link, and the different wavelengths are the wavelengths of the second optical signals that each of the optical fiber reflectors can reflect.

Optionally, as shown in FIG. 5, it is a flowchart of another fiber network fault detection method according to an embodiment of the present invention. On the basis of the embodiment shown in FIG. 4, in the method provided in this embodiment, the information returned by the optical fiber link may further include: first event information corresponding to the wavelength of the reflected second optical signal; Correspondingly, the implementation manner of performing fault detection of the optical fiber link according to the information returned by the optical fiber link in S420 may include the following steps, that is, S421 to S423:

S421: Acquire second event information corresponding to a wavelength of the first optical signal, where the second event information is a fiber link return obtained by transmitting the first optical signal of the wavelength to the optical fiber link when the optical fiber link does not fail. Event information;

S422. Compare the second event information with the first event information to determine whether there is a fault point.

S423. When it is determined that there is a fault point, it is determined that the region determined by the wavelength of the reflected second optical signal is a fault region.

Optionally, in this embodiment, an implementation manner of determining, in S423, that the region determined by the wavelength of the reflected second optical signal is a fault region may include: determining, by using a wavelength of the reflected second optical signal, a region In the carrier area, it is determined that the fault point is located in the operator area, and the fault area includes the operator area; when the wavelength determined by the wavelength of the reflected second optical signal is the optical network unit user area, the determined fault point is located in the optical network unit user area. The fault area includes an optical network unit user area.

Optionally, in the embodiment of the invention, the detecting device is, for example, an optical time domain reflectometer.

For example, in the embodiment of the present invention, the detecting device may separately deploy the reflection chips of the two inherent wavelengths λ1 and λ2 at the operator service concentration point (ie, the operator side described above) and the ONU user side. When the OTDR test is performed using the test parameters of the λ1 wavelength, there will be a strong reflection event at the reflection sheet of the λ1 wavelength, and there is no event at the reflection sheet of the λ2 wavelength, and vice versa; by the physical characteristics of the reflector, the failure can be determined. Point on the operator side or on the property side.

Through the description of the embodiments of the present invention and the optional embodiments, those skilled in the art can clearly understand that the method according to the embodiment of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium (such as ROM/RAM, disk). , CD), including a number of instructions to enable a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the present The method described in the embodiments and alternative implementations.

The embodiment of the present invention further provides a fiber network fault detecting device, which is used to implement the foregoing embodiments and optional embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function.

FIG. 6 is a schematic structural diagram of a fiber network fault detecting apparatus according to an embodiment of the present invention. The apparatus provided in this embodiment may include:

The transmitting module 51 is configured to: emit a first optical signal to the optical fiber link, and obtain information returned by the optical fiber link; where the optical fiber link is provided with one or more optical fibers that divide the optical fiber link into different regions. a reflector, each of the fiber optic reflectors configured to: reflect a second optical signal of a predetermined wavelength, and transparently transmit a third optical signal of a wavelength other than the predetermined wavelength, wherein the second optical signal reflected by the different optical fiber transmitters The wavelength of the first optical signal emitted by the transmitting module 51 includes one or more of wavelengths of the second optical signal that can be reflected by the one or more fiber optic reflectors, and the information returned by the optical fiber link includes: reflection occurs. The wavelength of the second optical signal;

The detecting module 52 is configured to perform fault detection of the optical fiber link according to the information returned by the optical fiber link acquired by the transmitting module 51, wherein the wavelength of the reflected second optical signal is used to determine the fiber optic reflector corresponding to the current wavelength. Area.

The optical fiber network fault detecting apparatus provided by the embodiment of the invention provides one or more fiber optic reflectors on the fiber link, the one or more fiber optic reflectors dividing the fiber link into different regions, each fiber optic reflector Reflecting a second optical signal of a predetermined wavelength and transmitting a third optical signal of other wavelengths, so that when the detecting device transmits the first optical signal to the optical fiber link and detects the fault according to the information returned by the acquired optical fiber link, Determining the area of the fiber-optic reflector corresponding to the wavelength according to the wavelength of the second optical signal that is reflected in the returned information, that is, determining the area where the fault occurs, thereby solving the problem that the fault cannot be located on the fiber link in the related art. The problem of the area.

Optionally, in the embodiment of the present invention, the transmitting module 51 is configured to: when the plurality of fiber optic reflectors are multiple, sequentially transmit the first optical signals of different wavelengths to the fiber link, and the different wavelengths are each fiber optic reflector. The wavelength of the second optical signal that can be reflected.

Optionally, in the embodiment of the present invention, the area defined by the fiber optic reflector may be In the area of the same responsible party, different responsible parties may include operators, fiber network unit user communities.

The optical fiber network fault detecting apparatus in the embodiment of the present invention may be disposed in the detecting device, and the detecting device may be an optical time domain reflectometer (OTDR).

Optionally, in the embodiment of the present invention, the information returned by the optical fiber link may further include: first event information corresponding to a wavelength of the reflected second optical signal, where the detecting module 52 is configured to return according to the optical fiber link. The information is used to perform the fault detection of the optical fiber link, and the implementation may include: acquiring second event information corresponding to the wavelength of the first optical signal, where the second event information is that the optical fiber link does not fail to the optical fiber. The link transmits the event information returned by the fiber link obtained by the first optical signal of the wavelength; compares the second event information with the first event information, determines whether there is a fault point; and determines that there is a fault point, determines that the reflection occurs The area determined by the wavelength of the second optical signal is a fault area.

Optionally, in the embodiment of the present invention, the detecting module 52 is configured to determine that the region determined by the wavelength of the reflected second optical signal is a fault region, and the implementation manner thereof may include: when the wavelength of the reflected second optical signal occurs When the determined area is the operator area, it is determined that the fault point is located in the operator area, and the fault area includes the operator area; when the area determined by the wavelength of the reflected second optical signal is the optical network unit user area, the fault is determined. The point is located in the user area of the optical network unit, and the fault area includes the area of the optical network unit user.

The technical solution provided by the embodiment of the present invention solves the problem that the fault location method in the OTDR calling related technology cannot accurately locate the fault point and determine the fault in the scenario of the FTTH broadband access operator and the property independent operation and maintenance optical fiber network. Point to the issue of the responsible party. The embodiment of the invention realizes that the network service guarantee is changed from manual and on-site processing to intelligent and remote processing, and provides a fast real-time fault handling mechanism, and the entire process is automatically executed to assist maintenance personnel to quickly eliminate optical network faults. When a fault occurs, accurately locate the fault point, greatly improve the troubleshooting efficiency, improve the network service guarantee efficiency, help reduce the probability of network failure, shorten the fault handling and recovery time, and a large number. Save manpower and material resources for network operation and maintenance.

In practical applications, the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the above modules are all located in the same processor; or, each of the above modules is in any combination. The forms are located in different processors.

Embodiments of the present invention also provide a storage medium. In an embodiment of the invention, the storage medium may be arranged to store program code for performing the following steps:

S1: transmitting a first optical signal to the optical fiber link, and acquiring information returned by the optical fiber link; wherein the optical fiber link is provided with one or more optical fiber reflectors that divide the optical fiber link into different regions, Each of the fiber optic reflectors is configured to: reflect a second optical signal of a predetermined wavelength, and transparently transmit a third optical signal of a wavelength other than the predetermined wavelength, wherein the wavelength of the second optical signal reflected by the different optical fiber transmitters is different, and the transmitting The wavelength of the first optical signal includes one or more of wavelengths of the second optical signal that the one or more fiber optic reflectors can reflect, and the information returned by the fiber link includes: the wavelength of the second optical signal that is reflected ;

S2: Perform fault detection of the fiber link according to information returned by the fiber link, wherein a wavelength of the reflected second optical signal is used to determine a region defined by the fiber reflector corresponding to the current wavelength.

Optionally, in the embodiment of the present invention, the storage medium is further configured to store program code for performing the following steps:

When there are multiple fiber optic reflectors, the first optical signals of different wavelengths are sequentially transmitted to the fiber link, and the different wavelengths are the wavelengths of the second optical signals that each fiber optic reflector can reflect.

Optionally, in the embodiment of the present invention, the information returned by the optical fiber link may further include: first event information corresponding to a wavelength of the reflected second optical signal, and correspondingly, the storage medium is further configured to be stored for execution. The program code for the following steps:

Obtaining second event information corresponding to a wavelength of the first optical signal, where the second event information is a fiber link return obtained by transmitting the first optical signal of the wavelength to the optical fiber link when the optical fiber link is not faulty Event information;

When it is determined that there is a fault point, determining the wavelength of the reflected second optical signal is determined The area is the fault area.

When the area determined by the wavelength of the reflected second optical signal is an operator area, it is determined that the fault point is located in the operator area, and the fault area includes the operator area;

When the area determined by the wavelength of the reflected second optical signal is the optical network unit user area, it is determined that the fault point is located in the optical network unit user area, and the fault area includes the optical network unit user area.

Optionally, in the embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a read-only memory (ROM), and a random access memory (Random Access Memory, RAM for short). ), removable hard disk, disk or optical disk, and other media that can store program code.

For example, the examples in the embodiments of the present invention may be referred to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium on a corresponding hardware platform (according to The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.

The device/function module/function module in the above embodiment may be implemented by a general-purpose computing device, which may be concentrated on a single computing device or distributed on a network composed of a plurality of computing devices.

When the device/function module/function module in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial applicability

Embodiments of the present invention provide one or more fiber optic reflectors on a fiber optic link, the one or more fiber optic reflectors dividing the fiber optic links into different regions, each fiber optic reflector reflecting a second of a predetermined wavelength The optical signal transmits the third optical signal of the other wavelengths, so that when the detecting device transmits the first optical signal to the optical fiber link and detects the fault according to the information returned by the obtained optical fiber link, the reflected light may be reflected according to the returned information. The wavelength of the second optical signal determines the area of the fiber-optic reflector corresponding to the wavelength, that is, the area where the failure occurs, thereby solving the problem in the related art that the area where the fault is located on the fiber link cannot be located.

Claims

A fiber network fault detection method includes:

Transmitting a first optical signal to a fiber optic link and acquiring information returned by the fiber optic link; wherein the fiber optic link is provided with one or more fiber optic reflectors that divide the fiber optic link into different regions Each of the fiber optic reflectors is configured to: reflect a second optical signal of a predetermined wavelength, and transparently transmit a third optical signal of other wavelengths than the predetermined wavelength, wherein the second optical signal reflected by the different optical fiber transmitters Different wavelengths, the wavelength of the first optical signal transmitted includes one or more of wavelengths of the second optical signal that the one or more fiber optic reflectors can reflect, information returned by the fiber link Including: a wavelength of a second optical signal that is reflected;

Performing fault detection of the fiber link according to the information returned by the fiber link, wherein a wavelength of the reflected second optical signal is used to determine a region defined by the fiber reflector corresponding to the current wavelength.
The method of claim 1, wherein when the plurality of fiber optic reflectors are plurality, the transmitting the first optical signal to the fiber optic link comprises:

A first optical signal of a different wavelength is sequentially transmitted to the fiber optic link, the different wavelength being a wavelength of a second optical signal that each of the fiber optic reflectors can reflect.
The method of claim 1, wherein the information returned by the fiber link further comprises: first event information corresponding to a wavelength of the reflected second optical signal, the return according to the fiber link The information is used to perform fault detection on the fiber link, including:

Obtaining second event information corresponding to a wavelength of the first optical signal, where the second event information is that when the fiber link is not faulty, transmitting the first light of the wavelength to the fiber link Event information returned by the fiber link acquired by the signal;

Comparing the second event information with the first event information to determine whether there is a fault point;

When it is determined that there is a fault point, it is determined that the region determined by the wavelength of the reflected second optical signal is a fault region.
The method according to claim 3, wherein the determining the region determined by the wavelength of the reflected second optical signal is a fault region, comprising:

When the area determined by the wavelength of the reflected second optical signal is an operator area, Determining that the fault point is located in the operator area, and the fault area includes the operator area;

When the area determined by the wavelength of the reflected second optical signal is an optical network unit user area, determining that the fault point is located in the optical network unit user area, where the fault area includes the optical network unit user area .
A fiber network fault detecting device includes:

a transmitting module, configured to: transmit a first optical signal to the optical fiber link, and acquire information returned by the optical fiber link; wherein the optical fiber link is provided with one that divides the optical fiber link into different regions Or a plurality of fiber optic reflectors, each of the fiber optic reflectors configured to: reflect a second optical signal of a predetermined wavelength and transparently transmit a third optical signal of other wavelengths than the predetermined wavelength, wherein different fiber optic transmitters The wavelength of the reflected second optical signal is different, and the wavelength of the first optical signal emitted by the transmitting module comprises: one or more of wavelengths of the second optical signal that the one or more fiber optic reflectors can reflect The information returned by the fiber link includes: a wavelength of a second optical signal that is reflected;

a detecting module, configured to: perform fault detection of the optical fiber link according to information returned by the optical fiber link acquired by the transmitting module, where a wavelength of the reflected second optical signal is used to determine a corresponding wavelength The area defined by the fiber optic reflector.
The apparatus of claim 5 wherein said transmitting module is configured to:

When there are a plurality of fiber optic reflectors, first optical signals of different wavelengths are sequentially transmitted to the fiber optic links, the different wavelengths being wavelengths of second optical signals that each of the fiber optic reflectors can reflect.
A fiber network fault detection system includes: one or more fiber optic reflectors and detection devices, wherein

The one or more fiber optic reflectors are disposed on the fiber link to divide the fiber link into different regions, and each of the fiber optic reflectors is configured to: reflect a second optical signal of a predetermined wavelength, and transparently transmit a third optical signal of other wavelengths than the predetermined wavelength, wherein wavelengths of the second optical signals reflected by different fiber optic transmitters are different;

The detecting device is configured to: transmit a first optical signal to the optical fiber link, and acquire information returned by the optical fiber link, where the wavelength of the first optical signal that is transmitted includes: the one or more One or more of the wavelengths of the second optical signal that the fiber optic reflector can reflect, the fiber The information returned by the link includes: a wavelength of the second optical signal that is reflected;

The detecting device is further configured to: perform fault detection of the optical fiber link according to information returned by the optical fiber link, where a wavelength of the reflected second optical signal is used to determine a fiber reflection corresponding to the current wavelength The area divided by the device.
The system of claim 7 wherein

When there are a plurality of fiber optic reflectors, at least one of the plurality of fiber optic reflectors is disposed on a carrier side of the fiber optic link, and at least one of the plurality of fiber optic reflectors is disposed in the fiber optic chain On the user side of the optical network unit on the road, the plurality of fiber optic reflectors divide the fiber link into an operator area and an optical network unit user area;

When the fiber optic reflector is one, the fiber optic reflector is disposed on a carrier side or an optical network unit user side on the fiber link, and the fiber optic reflector divides the fiber link into a carrier area And the non-operator area, or the optical fiber link is divided into an optical network unit user area and a non-optical network unit user area.
The system of claim 7, wherein when the plurality of fiber optic reflectors are plurality, the detecting device is configured to transmit the first optical signal to the fiber optic link, comprising:

A first optical signal of a different wavelength is sequentially transmitted to the fiber optic link, the different wavelength being a wavelength of a second optical signal that each of the fiber optic reflectors can reflect.
The system of claim 9, wherein the information returned by the fiber link further comprises: first event information corresponding to a wavelength of the reflected second optical signal, wherein the detecting device is configured to be The information returned by the fiber link performs fault detection of the fiber link, including:

Obtaining second event information corresponding to a wavelength of the first optical signal, where the second event information is that when the fiber link is not faulty, transmitting the first light of the wavelength to the fiber link Event information returned by the fiber link acquired by the signal;

Comparing the first event information with the second event information to determine whether there is a fault point;

When it is determined that there is a fault point, it is determined that the region determined by the wavelength of the reflected second optical signal is a fault region.