CN114465661A

CN114465661A - Fault positioning method, device and system

Info

Publication number: CN114465661A
Application number: CN202011248579.5A
Authority: CN
Inventors: 艾凡; 齐斌; 陈飞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2022-05-10
Also published as: WO2022100384A1

Abstract

The application discloses a fault positioning method, a fault positioning device and a fault positioning system, and belongs to the field of optical communication. The method comprises the following steps: acquiring the position of a fault point on optical network equipment in a monitoring link; determining the device identifier of the fault point based on the position of the fault point in the monitoring link and the corresponding relation between the position and the device identifier; the optical network device includes a backplane and at least two boards, where the correspondence between the location and the device identifier is established based on at least two reference links determined by changing a connection relationship between the at least two boards in the optical network device and the backplane, where the at least two reference links include at least part of links of the monitoring links. The method and the device are used for positioning the fault point of the check link on the optical network equipment.

Description

Fault positioning method, device and system

Technical Field

The present disclosure relates to the field of optical communications, and in particular, to a method, an apparatus, and a system for fault location.

Background

An optical cross-connect (OXC) device is a device used in an optical network, and includes a single board and a backplane fiber connection device (called a backplane for short). The back plate is provided with a plurality of optical fiber connectors (also called optical connectors or optical fiber reflecting heads) for detachably connecting with the single plate.

With the use of OXC equipment, optical components on the OXC equipment, such as fiber splices or boards, may fail. The current OXC equipment is also provided with a Monitor (MON) board for monitoring whether the OXC equipment has link failure. When the monitoring board is used for fault monitoring, a loop is formed by the monitoring board, the back board and at least one single board connected to the back board. The monitoring board sends an optical signal to the loop, receives the optical signal passing through the loop, determines the insertion loss of the loop through the sent optical signal and the received optical signal, and determines whether a link fault exists in the loop based on the insertion loss.

However, the current fault monitoring method can only determine whether a link fault exists on the OXC equipment, but cannot determine which optical device the fault point is, so that fault location cannot be performed.

Disclosure of Invention

The embodiment of the application provides a fault positioning method, a fault positioning device and a fault positioning system. The technical scheme is as follows:

in a first aspect, a fault location method is provided, which may be performed by a fault location device, the method comprising:

acquiring the position of a fault point on optical network equipment in a monitoring link; determining the device identifier of the fault point based on the position of the fault point in the monitoring link and the corresponding relation between the position and the device identifier; the corresponding relationship between the positions and the device identifications is the corresponding relationship between the positions of a plurality of optical devices in the optical network equipment and the device identifications of the plurality of optical devices. The optical network device includes a backplane and at least two single boards, where the correspondence between the location and the device identifier is established based on at least two reference links determined by changing a connection relationship between the at least two single boards in the optical network device and the backplane, where the at least two reference links include at least part of links of the monitoring link.

The fault location method provided in the embodiment of the present application can determine the device identifier of the fault point based on the correspondence between the positions of the at least two reference links and the device identifier, which is determined by changing the connection relationship between the at least two boards and the backplane in the optical network device, and based on the position of the fault point in the monitoring link and the correspondence between the positions and the device identifier after the fault point occurs in the monitoring link. Therefore, the optical device at the fault point can be determined based on the device identification of the fault point, and effective fault location is realized.

In an alternative implementation, the method further comprises: changing the connection relationship between the at least two single boards and the backplane in the optical network device to determine the at least two reference links; and establishing the corresponding relation based on the at least two reference links.

The optical network device comprises a plurality of optical fiber connectors for connecting the back panel and the single board, the monitoring link comprises the m-1 pair of optical fiber connectors and m single boards connected by the m-1 pair of optical fiber connectors, each pair of optical fiber connectors in the m-1 pair of optical fiber connectors comprises a first optical fiber connector and a second optical fiber connector, the first optical fiber connector and the second optical fiber connector in the monitoring link are adjacent, and m is an integer larger than 1. In an optional implementation manner, the fault location device may determine the position of the optical fiber connector in the monitoring link based on the determined at least two reference links, and then determine the position of the single board in the monitoring link, so as to obtain the positions of the optical devices on the monitoring link, and further establish the corresponding relationship. For example, the aforementioned process of establishing the corresponding relationship based on the at least two reference links includes:

determining the positions of the m-1 pairs of optical fiber connectors in the monitoring link based on the at least two reference links; determining the positions of the m single boards in the monitoring link based on the positions of the m-1 optical fiber connectors; acquiring the device identification of the m-1 pair of optical fiber connectors and the device identification of the m single plates; and establishing the corresponding relation based on the positions of the m-1 pair of optical fiber connectors, the positions of the m single boards, the device identifications of the m-1 pair of optical fiber connectors and the device identifications of the m single boards.

Illustratively, the aforementioned at least two reference links are divided into: m-1 reference link groups, each reference link group comprising a plurality of reference links, each reference link group for obtaining a pair of optical fiber splices, wherein, in the ith reference link group: each reference link comprises at least i +1 single boards connected with the backboard, each reference link comprises a part of the link where the first i single boards of the monitoring link are located, the i +1 th single boards of the multiple reference links are different, and i is more than or equal to 1 and less than or equal to m-1.

In the embodiment of the present application, the second optical fiber connector is positioned according to the position distribution characteristic of the second optical fiber connector in the ith pair of optical fiber connectors of the ith reference link group, which is different from other optical devices. According to this principle, the process of determining the position of the m-1 pair of optical fiber splices in the monitoring link, based on at least two reference links, may comprise: and obtaining m-1 relation curve groups corresponding to the m-1 reference link groups one by one, wherein each reference link corresponds to one relation curve. If the difference between the maximum value and the minimum value in the position distribution range of the tth reflection peak of a plurality of relation curves in the ith relation curve group is larger than a preset difference value, determining the position corresponding to the tth reflection peak in the monitoring link as the position of a second optical fiber connector, wherein t is larger than 1; and determining the position corresponding to the t-1 th reflection peak in the monitoring link as the position of a first optical fiber connector. In the embodiment of the present application, the relationship curve of any link is used to reflect the relationship between the light intensity of the monitored optical signal reflected by the point on any link and the position of the point on any link.

Because the fault positioning device determines the ith pair of optical connectors based on the link where the first i +1 single board in the ith reference link group is located, the link behind the i +1 single board does not affect the determination of the ith pair of optical connectors, and the reflection peak of each relation curve in the ith relation curve group at least comprises the reflection peak corresponding to the link where the first i +1 single board is located. Therefore, when the fault positioning device compares a plurality of relation curves in the ith relation curve group, the fault positioning device can traverse the first w reflection peaks of the relation curves according to the arrangement sequence of the reflection peaks in the relation curves by taking the minimum value w in the number of the reflection peaks of each relation curve in the ith relation curve group as the traversal cut-off condition so as to determine the reflection peaks with different position distribution characteristics, and all the reflection peaks in each relation curve do not need to be traversed, so that the comparison complexity is reduced. Thus, 2 < t < w.

In an optional implementation manner, the fault location device defaults that a fault point exists on a monitoring link in the optical network device, and directly executes a process of acquiring a position of the fault point in the monitoring link.

In another optional implementation manner, after determining that the link failure exists in the monitored link, the failure location device performs a process of acquiring a location of a failure point on the optical network device in the monitored link. Therefore, the process of acquiring the position of the fault point in the monitoring link can be avoided when the monitoring link is normal, redundant operation is reduced, and the positioning efficiency of the fault point is improved.

There are various ways to determine whether there is a link failure in the monitored link. The embodiments of the present application take several following alternative implementations as examples for illustration:

in a first alternative implementation, the fault location device determines whether there is a link fault in the monitored link by detecting an optical power loss of the service optical signal in at least a part of the monitored link. The process comprises the following steps: acquiring optical power loss of at least part of links in the monitoring links through which the service optical signals pass; and determining that the link fault exists in the monitoring link after determining that the optical power loss is larger than the optical power loss threshold.

Optionally, the optical power loss is a difference between optical powers detected at an output end of a first board and an output end of a last board through which a service optical signal passes in the monitoring link. Thus, the optical power loss monitoring of the complete path of the link through which the service optical signal passes in the link can be realized.

In practical implementation, the optical power loss may also be a difference value of optical powers detected at output ends of any two single boards through which the service optical signal passes in the monitoring link.

In a second alternative implementation, the fault location means determines whether there is a link fault in the monitored link by establishing a loop through at least part of the links of the monitored link in the optical network structure. The process comprises the following steps:

the fault positioning device sends an optical signal to the loop, receives the optical signal passing through the loop, determines the insertion loss of the loop through the sent optical signal and the received optical signal, and determines whether a link fault exists in the loop based on the insertion loss.

In this embodiment of the present application, the process of acquiring the location of the failure point on the optical network device in the monitoring link includes:

acquiring the light intensity of a reflection peak generated by the monitoring link reflecting the monitoring optical signal; and sequentially comparing the light intensity of the reflection peak corresponding to the monitoring link with a preset target light intensity according to the sequence of the transmission direction from first to last so as to determine the position of a fault point in the monitoring link.

Optionally, the method further comprises: after each single board included in the monitoring link is installed on the optical network equipment, the target light intensity of each reflection peak generated by the monitoring link reflecting the monitoring optical signal is obtained; and storing the acquired target light intensity.

In a second aspect, the present application provides a fault location apparatus, which may include at least one module, where the at least one module may be configured to implement the fault location method provided in the first aspect or any of the various possible implementations of the first aspect.

In a third aspect, a fault locating device is provided, the device comprising:

a processor and a memory;

the memory stores computer instructions; the processor executes the computer instructions stored by the memory to cause the fault location device to perform the fault location method provided by the first aspect or the various possible implementations of the first aspect described above.

In a fourth aspect, a computer-readable storage medium is provided, in which computer instructions are stored, and the computer instructions instruct a computer device to execute the fault location method provided by the first aspect or various possible implementations of the first aspect.

In a fifth aspect, there is provided a chip comprising programmable logic circuitry and/or program instructions for performing the fault location method provided in the first aspect or in each possible implementation of the first aspect when the chip is in operation.

In a sixth aspect, a fault location system is provided, comprising: an optical network device and a fault location apparatus as claimed in any of the second or third aspects.

In a seventh aspect, the present application provides a computer program product comprising computer instructions stored in a computer readable storage medium. The computer instructions may be read by a processor of a computer device from a computer-readable storage medium, and the computer instructions may be executed by the processor to cause the computer device to perform the fault location method provided by the first aspect or the various possible implementations of the first aspect.

To sum up, the fault location method provided in this embodiment of the present application can determine the device identifier of the fault point based on the correspondence between the positions of the at least two reference links and the device identifier, which is determined by changing the connection relationship between the at least two boards and the backplane in the optical network device, and after the fault point occurs in the monitoring link, based on the position of the fault point in the monitoring link and the correspondence between the position and the device identifier. Therefore, the optical device at the fault point can be determined based on the device identification of the fault point, and effective fault location is realized.

In the embodiment of the application, the fault positioning device can directly report the fault optical device without manual secondary inspection, so that the fault maintenance time of a monitoring link in optical network equipment is reduced, and the labor cost is saved. In addition, the embodiment of the application is implemented based on the hardware structure of the existing optical network equipment, extra calibration on the optical fiber of the back plate is not needed, and the scheme has high robustness. The fault positioning method is simple and convenient to implement, can realize automatic fault positioning of the monitoring link, and does not need manual intervention.

Drawings

Fig. 1 is a schematic structural diagram of an optical network device according to an embodiment of the present application;

fig. 2 is a schematic diagram of an AA cross-sectional structure of the optical network device shown in fig. 1;

fig. 3 is a schematic flowchart of a fault location method according to an embodiment of the present application;

fig. 4 is a schematic diagram of a monitoring link according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an ith reference link set provided in an embodiment of the present application;

fig. 6 is a schematic diagram of a group 1 reference link corresponding to the monitoring link shown in fig. 4 according to an embodiment of the present application;

fig. 7 is a schematic diagram of a group 2 reference link corresponding to the monitoring link shown in fig. 4 according to an embodiment of the present application;

fig. 8 is a schematic application environment diagram of a fault location device according to an exemplary embodiment of the present application;

fig. 9 is a schematic diagram of a relationship curve corresponding to a reference link according to an embodiment of the present application;

FIG. 10 is a schematic diagram of a superposition of the relationship curves in the 2 nd relationship curve group provided by the embodiment of the present application;

fig. 11 is a schematic diagram of a relationship curve corresponding to the monitoring link shown in fig. 4 according to an embodiment of the present disclosure;

fig. 12 is a schematic application environment diagram of a fault location device according to an embodiment of the present application;

FIG. 13 is a block diagram of a fault locating device according to an embodiment of the present application;

FIG. 14 is a block diagram of another fault locating device provided in an embodiment of the present application;

FIG. 15 is a block diagram of a setup module provided in an embodiment of the present application;

FIG. 16 is a block diagram of another fault locating device provided in an embodiment of the present application;

FIG. 17 is a block diagram of another fault locating device provided in an embodiment of the present application;

fig. 18 is a possible basic hardware architecture of the fault locating device provided in the embodiment of the present application.

Detailed Description

In order to make the principle and technical solution of the present application clearer, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an optical network device according to an embodiment of the present disclosure, and fig. 2 is a schematic structural diagram of an AA cross-section of the optical network device shown in fig. 1. As shown in fig. 1 and fig. 2, the optical network device 10 includes a backplane 101, at least two boards 102, and a plurality of optical fiber connectors 103. A plurality of optical fibers are disposed within the backplane 101. The single board 102 may be a monitoring board or a Wavelength Selective Switching (WSS) service board. The monitoring board can comprise an optical switch, and the monitoring board can be connected with any other single board on the backboard through the optical switch and the backboard; the WSS service board has the capability of controlling the deflection of the transmission direction of the optical signal, and can be connected with any other single board on the backboard through the backboard. The optical fiber connector 103 is used for detachably connecting the back panel 101 with the single panel 102. Illustratively, the detachable connection is a pluggable connection. The fiber splices in the optical network device 10 may be located on the backplane 101 and/or the single board 102. In practical implementation of the embodiments of the present application, the optical fiber connector located between a single board and a backplane can be regarded as an optical fiber connector. For example, the single board 102 has the optical fiber connector x1, the backplane 101 has the optical fiber connector x2, and if the connection between the single board 102 and the backplane 101 is realized by plugging the optical fiber connector x1 and the optical fiber connector x2, the plugged optical fiber connector x1 and the optical fiber connector x2 may be regarded as the same optical fiber connector. For convenience of illustration, the following embodiments are all described by taking the optical fiber connectors as examples located on the back plate.

The optical network devices 10 shown in figures 1 and 2 may be OXC devices. Optionally, the OXC device may further include an OXC sub-rack 104, where the OXC sub-rack 104 is configured to support the backplane 101 and the at least two boards 102, so as to ensure stability of connection between the backplane 101 and the at least two boards 102. In an alternative implementation, the OXC sub-racks 104 are removably connected to the backplane 101; in another implementation, the OXC sub-racks 104 are fixedly connected to the backplane 101.

With the use of the optical network device 10, optical devices on the optical network device 10, such as the optical fiber connector 103 or the single board 102, may malfunction. For example, if a fiber splice 103 fails due to dirt or bending of the fiber splice caused by long-term use or other reasons, the insertion loss of the entire backplane may become large, and the quality of the optical signal transmitted in the optical network device may deteriorate. For another example, a certain optical structure included in a certain board 102 may be loosened or an optical path may be bent, so that the board 102 may malfunction, and the quality of an optical signal transmitted in the board 102 may be degraded. For example, the optical structure may be an optical switch in a monitor board, or the optical structure may be a Liquid Crystal On Silicon (LCOS), a microlens, a cylindrical mirror, a prism, or the like in a WSS service board.

However, in the related art, because the optical fiber connection mode in the backplane is complex, different single boards and different optical fiber connectors of the backplane can be connected to form different links in the optical network device. It is not possible to locate which optical device the failure point is actually in the link, even if it is determined that the failure point exists in the optical network equipment.

The fault positioning method provided by the embodiment of the application can determine the device identification of the fault point, so that a worker can quickly and effectively find out the optical device with the fault. Fig. 3 is a schematic flowchart of a fault location method according to an embodiment of the present application, where the fault location method may be executed by a fault location device. As shown in fig. 3, in the embodiment of the present application, a fault location process on one monitored link in the optical network device shown in fig. 1 and fig. 2 is taken as an example, and a fault location process of other monitored links refers to the monitored link. The monitoring link is a link (also called an optical path, an optical path or a path) that needs to be monitored for a fault in the optical network equipment. The monitoring link may be a link pre-designated by a user or a traffic transmission link in the optical network device. The fault positioning method comprises the following steps:

s301, establishing a corresponding relation between the position and the device identification.

The corresponding relation between the positions and the device identifications is the corresponding relation between the positions of the plurality of optical devices in the monitoring link and the device identifications of the plurality of optical devices. As mentioned above, the optical network device includes a backplane and at least two boards. In this embodiment of the present application, the correspondence between the position and the device identifier is established based on at least two reference links determined by changing the connection relationship between at least two boards in the optical network device and a backplane (a process of changing the connection relationship between at least two boards in the optical network device and a backplane is also a process of performing path switching in the optical network device). The reference link is a link determined in the optical network equipment based on the monitoring link and is used for establishing the corresponding relation between the position and the device identifier. The at least two reference links include at least a portion of the links of the monitoring link. Optionally, each of the at least two reference links comprises at least part of the monitoring link. Wherein one of the at least two reference links may include all links of the monitoring link.

For example, the process of establishing the correspondence between the location and the device identifier includes:

a1, changing the connection relationship between at least two single boards and a backplane in the optical network equipment to determine at least two reference links.

A2, establishing the corresponding relation between the position and the device identification based on at least two reference links.

The optical network equipment comprises a plurality of optical fiber connectors used for connecting the backboard and the single board. The monitoring link is a transmission link of an optical signal formed by connecting a single board with a back board through an optical fiber connector in the optical network equipment. The monitoring link comprises m-1 pairs of optical fiber joints and m single plates connected by the m-1 pairs of optical fiber joints, wherein m is an integer larger than 1, each pair of optical fiber joints in the m-1 pairs of optical fiber joints comprises a first optical fiber joint and a second optical fiber joint, and the first optical fiber joint and the second optical fiber joint are respectively used for connecting two adjacent single plates in the monitoring link, so that the first optical fiber joint and the second optical fiber joint in the monitoring link are adjacent. When the optical signal is transmitted in the monitoring link, for each pair of optical fiber connectors, the optical signal firstly passes through the first optical fiber connector and then passes through the second optical fiber connector via the back plate. Fig. 4 is a schematic diagram of a monitoring link according to an embodiment of the present disclosure. Fig. 4 assumes that m is 3, then the monitoring link includes 2 pairs of optical fiber splices and 3 boards. The monitoring link shown in fig. 4 is a link obtained according to a backplane fiber connection relationship of the optical network device, and for convenience of understanding of readers, the backplane with the physical structure as a whole is split into two logical backplane drawings in fig. 4. In the monitoring link, an optical signal is transmitted along an optical signal transmission direction, and sequentially passes through a single board 1, a first pair of optical fiber connectors (i.e., an optical fiber connector 1 and an optical fiber connector 2) of a backplane, the single board 2, a second pair of optical fiber connectors (i.e., an optical fiber connector 3 and an optical fiber connector 4) of the backplane, and the single board 3.

In the embodiment of the present application, the fault location apparatus performs the foregoing steps a1 and a2, determines at least two reference links first, and then establishes a corresponding relationship between the position and the device identifier under the guidance of the at least two reference links. In an optional implementation manner, the fault location device may determine the position of the optical fiber connector in the monitoring link based on the determined at least two reference links, and then determine the position of the single board in the monitoring link, thereby obtaining the position of each optical device on the monitoring link, and further establishing the corresponding relationship between the position and the device identifier.

For example, the fault location apparatus may divide the at least two reference links determined by performing the foregoing step a1 into m-1 reference link groups, where the m-1 reference link groups are in one-to-one correspondence with m-1 pairs of optical fiber splices, and each reference link group is used to determine a corresponding pair of optical fiber splices. Each reference link group includes a plurality of reference links, and the number of reference links in each reference link group may be preset, and may range from 2 to 20, for example. FIG. 5 is a schematic structural diagram of an ith reference link group provided in an embodiment of the present application, where in FIG. 5, it is assumed that the ith reference link group includes n reference links, and n ≧ 2. As shown in fig. 5, the ith reference link group is used to determine the ith pair of fiber optic splices. In the ith reference link group: each reference link comprises at least i +1 single boards connected with the backboard, each reference link comprises a part of links where the first i single boards of the monitoring link are located, the i +1 single boards in the i reference link group are different, and i is more than or equal to 1 and less than or equal to m-1. In this way, the arrangement sequence of the optical devices before the i +1 th board in the ith reference link group is the same as the arrangement sequence of the optical devices before the i +1 th board in the monitoring link. As shown in fig. 5, the arrangement order of each optical device before the i +1 th board of the reference link 1 to n is the same, and each optical device includes a board 1, a1 st pair of optical connectors, a board 2, a second pair of optical connectors … …, a board i, and an ith pair of optical fiber connectors; the i +1 th boards of reference links 1 to n are different and are board o, board p, board q, and so on. It should be noted that, if the multiple reference links further include a board located behind the (i + 1) th board, boards behind the (i + 1) th board of the multiple reference links may be the same or different, and do not affect the determination of the i-th optical fiber splice.

Fig. 6 and fig. 7 are schematic diagrams of a group 1 reference link and a group 2 reference link corresponding to the monitoring link shown in fig. 4, respectively, provided in an embodiment of the present application. As shown in fig. 6, the 1 st reference link group includes 4 reference links, which are a link including a board 1 and a board 2, a link including a board 1 and a board 3, a link including a board 1 and a board 4, and a link including a board 1 and a board 5. In the 1 st reference link group: each reference link comprises at least 2 single boards connected with the backplane, each reference link comprises a part of the link where the first 1 single board of the monitoring link is located, and the 2 nd single boards included in the multiple reference links are different.

As shown in fig. 7, the 2 nd reference link group includes 3 reference links, which are a link including board 1, board 2, and board 3, a link including board 1, board 2, and board 4, and a link including board 1, board 2, and board 5. In the 2 nd reference link set: each reference link comprises at least 3 single boards connected with the backplane, each reference link comprises a part of links where the first 2 single boards of the monitoring link are located, and the 3 rd single boards of the multiple reference links are different.

Accordingly, the foregoing step a2 may include: the positions of a plurality of pairs of optical fiber connectors are determined based on at least two reference links, then the positions of a plurality of single plates are determined based on the positions of the plurality of pairs of optical fiber connectors, and further the corresponding relation between the positions and the device identification is established. Illustratively, the process includes the steps of:

a21, based on at least two reference links, determining the position of m-1 pair of optical fiber connectors in the monitoring link.

As previously mentioned, in any link in an optical network device, for each pair of fibre splices, the first fibre splice is located before the second fibre splice. When the optical signal passes through the first optical fiber connector, the optical signal is influenced by a link before the first optical fiber connector and the first optical fiber connector; the optical signal is influenced by the link before the second optical fiber connector and the second optical fiber connector when passing through the second optical fiber connector. And the link before the second fiber stub increases the fiber in the backplane between the first fiber stub and the second fiber stub relative to the link before the first fiber stub, the distance of the second fiber stub from the first fiber stub is affected by the length of the fiber in the backplane. Taking the ith reference link group as an example, the link before the (i + 1) th board in the monitoring link may be kept unchanged, and the link switching is performed through the inside of the ith board in the monitoring link, so that the ith board is connected with different (i + 1) th boards through a backplane to obtain the ith reference link group. In the ith pair of optical fiber connectors of the plurality of reference links included in the reference link group, the physical position of the first optical fiber connector is fixed, and the physical position of the second optical fiber connector is different. Although there is link switching inside the ith board connected to the first optical fiber splice, since the optical path inside the board is short and the link length change caused by the link switching is small, the positions of the optical devices in the links before the first optical fiber splice of the multiple reference links of the ith reference link group are the same or approximately the same. The difference between the lengths of the optical fibers in the backplane between the second optical fiber splice and the first optical fiber splice of the multiple reference links is large, so that the position of the second optical fiber splice in the multiple reference links can generate large changes, and the changes are usually much larger than the position changes caused by the change of the optical path inside a certain single board. Therefore, in the ith pair of optical fiber connectors in the ith reference link group, the position distribution range of the second optical fiber connector is larger, and the difference between the maximum value and the minimum value in the position distribution range can reach centimeter level or even meter level. The second optical fiber connector has a larger difference with the position distribution characteristics of other optical devices (such as a single board and other optical fiber connectors) in the reference link.

Taking fig. 6 as an example, in the 4 reference links included in the 1 st reference link group, the positions of the optical devices in the links before the first optical fiber splice are the same or approximately the same. However, the lengths of the optical fibers in the backplane between the second optical fiber connectors respectively connecting the single boards 2 to 5 and the first optical fiber connectors are different, so that the positions of the second optical fiber connectors in the 4 reference links are greatly changed.

In the embodiment of the present application, the second optical fiber connector is positioned according to the position distribution characteristic of the second optical fiber connector in the ith pair of optical fiber connectors of the ith reference link group, which is different from other optical devices. According to this principle, the process of determining the position of the m-1 pair of optical fiber splices in the monitoring link, based on at least two reference links, may comprise:

and A211, acquiring m-1 relation curve groups corresponding to the m-1 reference link groups one by one.

Each reference link corresponds to a relationship curve, and each relationship curve is used to reflect the relationship between the light intensity of the monitored optical signal reflected by a point (for example, an optical fiber connector or an optical structure in a single board) on the corresponding reference link and the position of the point on the corresponding reference link. Each relationship curve group includes a plurality of relationship curves.

Fig. 8 is a schematic application environment diagram of a fault location device 40 according to an exemplary embodiment of the present application. The fault locating device 40 includes a reflected light detection module 401 and a processing module 402, where the reflected light detection module 401 is configured to send (also called inject) a monitoring optical signal to a link (such as a reference link or a monitoring link) in the optical network device, receive the monitoring optical signal reflected by the link in the optical network device, and determine the optical intensity of the received optical signal. In an optional implementation manner, the reflected light detection module 401 may generate a relationship curve according to the light intensity of the received monitored light signal and the determined position of the reflection point corresponding to the light intensity in the link, output the generated relationship curve to the processing module 402, and determine the position of the m-1 pair of optical fiber connectors by the processing module 402 based on the obtained relationship curve. In another optional implementation manner, the reflected light detection module 401 may receive the light intensity of the monitored optical signal and determine the position of the reflection point corresponding to the light intensity in the link, output the received light intensity of the monitored optical signal and the determined position to the processing module 402, generate a relationship curve by the processing module 402, and determine the position of the optical fiber splice by m-1 based on the generated relationship curve. The process of the photodetection module 401 acquiring the light intensity of the monitored optical signal and the position of the reflection point corresponding to the light intensity in the link may refer to an Optical Frequency Domain Reflectometer (OFDR) technology or an optical time-domain reflectometer (OTDR) technology. The reflected light detection module 401 can achieve a spatial resolution of 10cm (centimeter) or less, thus ensuring effective identification of each reflection peak.

It should be noted that, the wavelength of the monitoring optical signal is different from the wavelength of the service optical signal (also referred to as signal light) transmitted in the monitoring link, so that the influence on the service optical signal can be avoided.

In a first alternative example, the position of a point on the reference link may be represented by a transmission distance (i.e., a distance traveled by the monitoring optical signal from emission to return) of the monitoring optical signal from the reference point to return to the reference point after the monitoring optical signal is reflected by the point on the reference link; in a second alternative example, the position of a point on the reference link may be represented by the distance of the point from a reference point, which is the origin of the acquired relationship curve. In both of these alternative examples, the relationship curves may be represented as light intensity distribution curves over distance.

Illustratively, in a second alternative example, the reference point may be a transmitting end of the monitoring optical signal. Because the distance between the transmitting end of the monitoring optical signal and the receiving end of the monitoring optical signal is usually small, the difference between the distances between the transmitting end and the receiving end of the monitoring optical signal can be ignored. Thus, the reference point may also be the receiving end of the monitoring optical signal. When the structure of the fault locating module 40 is as shown in fig. 8, the reference point may be a reflected light detection module. In an alternative implementation, the reflected light detection module may determine the position of the point on the reference link based on the transmission time and the reception time of the monitored optical signal and the transmission speed of the monitored optical signal. In another alternative implementation, the reflected light detection module may determine the position of the point on the reference link based on the receiving frequency of the monitored optical signal and a mapping relationship between the frequency and the position, where the mapping relationship between the frequency and the position is used to represent a correspondence relationship between the receiving frequency of the monitored optical signal reflected by the point on the reference link and the position of the point on the reference link, which is received by the reflected light detection module.

Fig. 9 is a schematic diagram of a relationship curve corresponding to a reference link according to an embodiment of the present application. Fig. 9 assumes that the reference link is a link including board 1, board 2, and board 3. The horizontal axis of the graph represents distance in meters (m) and the vertical axis represents light intensity in dBm (decibel-milliwatt) which represents how many watts the light intensity is. The distance may be a transmission distance that the monitoring optical signal returns to the reference point after being reflected from the reference point through a point on the reference link, or may be a distance from the point on the reference link to the reference point. In fig. 9, the reflection of the monitoring optical signal through the reference link forms 11 reflection peaks. The reflection peak refers to the peak in the relationship curve. The position of each reflection peak in the relation curve reflects the position of a structure with a reflection function in the corresponding reference link, where the structure with a reflection function may be an optical device (e.g., an optical fiber connector) or an optical structure inside the optical device (e.g., an LCOS, a microlens, a cylindrical mirror, a prism, or the like in a single plate), and then 11 reflection peaks in fig. 9 indicate that there are 11 structures with a reflection function in the reference link, where the structures are different from the optical fiber. It should be noted that one or more optical structures are usually disposed in one single plate, and thus, one single plate may correspond to one or more reflection peaks in the relationship curve.

And A212, if the difference between the maximum value and the minimum value in the position distribution range of the tth reflection peak of a plurality of relation curves in the ith relation curve group is larger than a preset difference value, determining the position corresponding to the tth reflection peak in the monitoring link as the position of a second optical fiber connector.

For example, the preset difference value may be 5 centimeters (cm). The difference between the maximum value and the minimum value in the position distribution range of the tth reflection peak of the plurality of relation curves is larger than the preset difference value, which indicates that the position distribution range is larger. The larger location distribution range reflects that the tth structure with the reflection function of the multiple reference links of the ith reference link group has a location distribution characteristic different from other structures (such as other optical fiber splices or optical structures inside a single board). And the second optical splice of the ith pair of optical fiber splices of the plurality of reference links of the ith reference link group also has the location distribution characteristic. The t structures with the reflection function are the second optical connectors to be determined. Based on this, the position corresponding to the t-th reflection peak of the plurality of reference links of the i-th reference link group (i.e. the position of the t-th structure with reflection function) is determined as the position of the second optical fiber splice in the i-th pair of optical fiber splices of the plurality of reference links of the i-th reference link group. As described above, the arrangement order of the optical devices before the i +1 th board in the ith reference link group is the same as the arrangement order of the optical devices before the i +1 th board in the monitoring link. Then, the tth reflection peak corresponding position of the monitoring link is the position of the second optical fiber connector in the ith pair of optical fiber connectors of the monitoring link. The position corresponding to a certain reflection peak of the monitoring link is also the position corresponding to the peak light intensity (or height) of the reflection peak in the relationship curve of the monitoring link.

Since it is determined that there is a second fiber splice in the ith pair of fiber splices and there is at least one first fiber splice in front of the second fiber splice in the monitoring link, the position of the second fiber splice is the position of at least the 2 nd reflection peak in the relationship curve, and t > 1.

Since at least one single board is connected in front of the ith pair of optical fiber splices, and one single board includes at least one optical structure, at least one optical structure in one single board and one first optical splice are arranged in front of the second optical fiber splice to be determined in the monitoring link. Therefore, the position of the second optical fiber connector is the position of at least the 3 rd reflection peak in the relation curve, and t is larger than 2.

In an alternative implementation manner, when the fault location device compares a plurality of relationship curves in the ith relationship curve group, the fault location device may traverse each reflection peak according to the arrangement order of the reflection peaks in the relationship curves to determine the reflection peaks with different position distribution characteristics. Thus, 2 < t < r, r is the maximum value among the numbers of reflection peaks of the respective curves in the ith curve group.

In another optional implementation manner, because the fault location device determines the ith pair of optical connectors based on the link where the first i +1 single board in the ith reference link group is located, the link after the i +1 single board does not affect the determination of the ith pair of optical connectors, and the reflection peak of each relationship curve in the ith relationship curve group at least includes the reflection peak corresponding to the link where the first i +1 single board is located. Therefore, when the fault positioning device compares a plurality of relation curves in the ith relation curve group, the fault positioning device can traverse the first w reflection peaks of the relation curves according to the arrangement sequence of the reflection peaks in the relation curves by taking the minimum value w in the number of the reflection peaks of each relation curve in the ith relation curve group as the traversal cut-off condition so as to determine the reflection peaks with different position distribution characteristics, and all the reflection peaks in each relation curve do not need to be traversed, so that the comparison complexity is reduced. Thus, 2 < t < w.

Taking the 2 nd relation curve group corresponding to the 2 nd reference link group shown in fig. 7 as an example, fig. 10 is a schematic diagram of superposition of relation curves in the 2 nd relation curve group provided in the embodiment of the present application. As can be seen from fig. 10, after the 3 relation curves in the 2 nd relation curve group are superimposed, the position distribution ranges of the reflection peak before the 11 th reflection peak in the 3 relation curves are substantially the same (for example, the positions are the same or the position variation is smaller than the acceptable error range), so the curves are substantially overlapped. And the 11 th reflection peak in the 3 relation curves is different in position, the position distribution range of the 3 relation curves is 16.3 to 17 meters, the fault positioning device can obtain the relation curve of the monitoring link on the assumption that the preset difference value is 0.5 meter, the difference between the maximum value and the minimum value of the 11 th reflection peak in the 3 relation curves is 0.7, and 0.7 is greater than 0.5, and the position corresponding to the 11 th reflection peak of the monitoring link is determined as the position of a second optical fiber connector on the basis of the relation curve of the monitoring link. The relation curve of the monitoring link is used for reflecting the relation between the light intensity of the monitored optical signal after being reflected by the point on the monitored link and the position of the point on the monitoring link, and the reflection peak refers to a peak in the relation curve.

It should be noted that the fault locating device may sequentially determine a pair of optical fiber connectors corresponding to each reference link group according to the sequence of m-1 reference link groups from first to last; multiple pairs of optical fiber connectors corresponding to multiple reference link groups can also be determined in parallel, and the determination of the order of m-1 pairs of optical fiber connectors based on m-1 reference link groups is not limited in the embodiment of the application.

In the embodiment of the application, the fault monitoring device determines the reflection peak with the position distribution range different from other reflection peaks by comparing the plurality of relation curves in the ith relation curve group, so as to determine the second optical fiber connector. Fig. 10 compares the relational curves in such a manner that a plurality of relational curves in the ith relational curve group are superimposed. In practical implementation, the comparison of the plurality of relation curves in the ith relation curve group can be performed in other manners. For example, for each relation curve in the ith relation curve group, the position of each reflection peak is obtained according to the sequence from first to last; and acquiring the position of the t-th reflection peak in each relation curve in the plurality of relation curves, and acquiring a position interval between the maximum value and the minimum value in the positions of the t-th reflection peaks of the plurality of relation curves, namely the position distribution range of the t-th reflection peaks of the plurality of relation curves.

And A213, determining the position corresponding to the t-1 th reflection peak in the monitoring link as the position of a first optical fiber connector.

As described above, after a first optical fiber splice is adjacent to a second optical fiber splice in a monitoring link and the second optical fiber splice is located before the first optical fiber splice, based on a relationship curve of the monitoring link, a position corresponding to a previous reflection peak adjacent to the second optical fiber splice in the monitoring link is determined as a position of the first optical fiber splice, and the first optical fiber splice and the second optical fiber splice form a pair of optical fiber splices.

Still taking fig. 10 as an example, after the position corresponding to the 11 th reflection peak in the monitoring link is determined as the position of the second optical fiber splice, the position corresponding to the 10 th reflection peak in the monitoring link is determined as the position of the first optical fiber splice.

A22, determining the positions of m single boards in the monitoring link based on the positions of the m-1 optical fiber joints.

As mentioned previously, the reference link includes m-1 pairs of fiber optic splices, and m boards connected by m-1 pairs of fiber optic splices. After the m-1 pairs of optical fiber connectors are determined, the positions of m single boards in the monitoring link can be determined by referring to the positions of the m-1 pairs of optical fiber connectors. For example, after the relationship curve corresponding to the monitoring link is obtained, the position of the m-1 pair of optical fiber connectors is used as a dividing node to divide the relationship curve corresponding to the monitoring link into m curve segments (which may also be regarded as optical path disassembly of the monitoring link corresponding to the relationship curve), the m curve segments correspond to the m veneers one by one, and for any one of the m curve segments, the position of each reflection peak in the curve segment belongs to the position of the corresponding veneer. That is, the position of a single plate is actually a position interval (also referred to as a position range) to which the position of the reflection peak in the curve segment corresponding to the single plate belongs.

Fig. 11 is a schematic diagram of a relationship curve corresponding to the monitoring link shown in fig. 4 according to an embodiment of the present application. As shown in fig. 11, after it is assumed that the positions of 2 pairs of optical fiber connectors are determined, the positions of 2 pairs of optical fiber connectors are used as dividing nodes to divide the relationship curve corresponding to the monitoring link into 3 curve segments, where the 3 curve segments are respectively in one-to-one correspondence with the positions of the board 1, the board 2, and the board 3. Thus, the positions of board 1, board 2 and board 3 in the monitoring link can be determined. For example, in fig. 11, veneer 1 is located at 0 to 11.4 meters, veneer 2 is located at 12.8 to 15.2 meters, and veneer 3 is located at 16.7 to 19.7 meters.

A23, obtaining the device identification of the m-1 pair optical fiber connector and the device identification of the m single boards.

The device identification of the single board in the optical network equipment has a plurality of obtaining modes. The embodiment of the present application takes the following three acquisition modes as examples for explanation:

the first acquisition mode is to receive the device identifier of the single board input by the user. The user can sequentially input the device identifiers of the single boards to the fault positioning device according to the connection sequence of the single boards in the monitoring link, and correspondingly, the fault positioning device records the device identifiers of the single boards according to the input sequence of the device identifiers.

In the second acquisition mode, the device identifier is allocated to the board according to a preset allocation rule. For example, the backplane has a slot for plugging a board, and the fault location device may allocate a device identifier to the board according to the slot into which the board is plugged. For example, the device inserted into the single board in the kth slot is identified as "single board in the kth slot", k is greater than or equal to 1 and less than or equal to r, and r is the total number of the slots. For another example, a device identifier is allocated to the board according to the sequence of the slot positions into which the board is inserted, the device identifier is a serial number, and for example, the device identifiers of the boards inserted into the 1 st slot position to the r th slot position are 001 to 00r respectively.

In a third acquisition mode, a single board is provided with a unique identification code, and the fault positioning device acquires the unique identification code of each single board as a device identification of the single board. The unique identification code of the single board may be an identification code set when the single board leaves a factory, or an identification code written for the single board after leaving the factory. The unique identification code may be carried on a single board, such as on a housing of the single board, for easy viewing by a user. For example, it may be a two-dimensional code.

It should be noted that the device identifier may also have other obtaining manners, as long as the obtained device identifier is convenient for a user to quickly find a corresponding single board in the optical network device, which is not limited in this embodiment of the present application.

The device identification of the optical fiber joint in the optical network equipment has a plurality of acquisition modes. The embodiment of the present application takes the following three acquisition modes as examples:

in the first acquisition mode, the device identification of the optical fiber connector input by a user is received. The user can input the device identifiers of the optical fiber connectors to the fault positioning device in sequence according to the connection sequence of the optical fiber connectors in the monitoring link, and correspondingly, the fault positioning device records the device identifiers of the optical fiber connectors according to the input sequence of the device identifiers. In practical implementation, referring to the first obtaining manner of the identifier of the single board, a user may input the device identifier of each optical device on the reference link to the fault locating apparatus at one time according to the connection sequence of the single board and the optical fiber connector in the monitoring link. The user can also input the device identifier of the single board and the device identifier of the optical fiber connector respectively.

And in the second acquisition mode, the device identification is distributed to the optical fiber connector according to a preset distribution rule.

In an example, the backplane has a slot for plugging a single board, and the optical fiber connectors are distributed in the slot. The fault location device can distribute the device identification for the optical fiber connector according to the position of the slot where the optical fiber connector is located. For example, the device plugged into the fiber splice of the kth slot position is marked as the fiber splice in the kth slot position, k is more than or equal to 1 and less than or equal to r, and r is the total number of the slot positions. For another example, the device identifiers are assigned to the optical fiber connectors according to the sequence of the slots into which the optical fiber connectors are inserted, the device identifiers are serial numbers, and for example, the device identifiers of the optical fiber connectors inserted into the 1 st slot to the r-th slot are 101 to 10r respectively.

For example, the fault location device may assign a device identifier to the optical fiber splice according to the device identifier of the single board to which the optical fiber splice is connected. For example, the device identification of the fiber splice is generated based on the device identifications of the connected singleboards. For example, the device of the fiber splice connected to the single board 001 is denoted as "fiber splice connected to the single board 001".

In the third acquisition mode, the optical fiber connectors are provided with unique identification codes, and the fault positioning device acquires the unique identification codes of the optical fiber connectors as the device identifications of the optical fiber connectors. The unique identification code of the optical fiber connector can be an identification code set when the optical fiber connector leaves a factory, and can also be an identification code written for the optical fiber connector after leaving the factory. The unique identification code may be carried on the fiber optic connector, such as on the housing of the fiber optic connector, for easy viewing by a user, which may be a laser code, for example.

It should be noted that the device identifier may also have other obtaining manners, as long as the obtained device identifier is convenient for a user to quickly find a corresponding optical fiber connector in the optical network device, which is not limited in this embodiment of the present application.

A24, establishing the corresponding relation between the position and the device mark based on the position of the m-1 pair of optical fiber connector, the positions of the m single boards, the device mark of the m-1 pair of optical fiber connector and the device mark of the m single boards.

In a24, since the monitor link is predetermined, the arrangement order of the optical devices in the monitor link is known, the positions of the optical devices are known (the positions of the optical devices are determined by the foregoing a21 and a 22), the device identifications of the optical devices are known (the device identifications of the optical devices are determined at a 23), and the fault location device may establish the correspondence between the positions and the device identifications based on the correspondence between the positions and the arrangement order of the optical devices and the correspondence between the device identifications of the optical devices and the arrangement order.

As shown in fig. 11, monitoring the first board in the link: the position of the board 1 is 0 to 11.4 meters, and if the device identifier of the first board is 001 obtained based on step a21, the established correspondence relationship between the position and the device identifier includes the position: 0 to 11.4 meters corresponds to device identification: 001. the position of the first optical fiber splice in the first pair of optical fiber splices in the monitoring link is 11.7 meters, and assuming that the device identifier of the first optical fiber splice is 101 obtained based on step a21, the corresponding relationship between the established position and the device identifier includes the positions: 11.7 meters corresponds to device identification: 101. for example, based on the relationship curve corresponding to the monitoring link shown in fig. 11, the established correspondence between the position and the device identifier may be as shown in table 1.

TABLE 1

The foregoing embodiment is described by taking an example in which the establishment of the correspondence between the position and the device identifier is performed by the fault location apparatus, and in actual implementation, the correspondence between the position and the device identifier may also be automatically established by other equipment or manually established by other equipment. And inputting the established corresponding relation between the position and the device identifier into a fault positioning device by other equipment or manually introducing the fault positioning device. The embodiment of the present application does not limit the device that establishes the correspondence between the position and the device identifier.

S302, the position of a fault point on the optical network equipment in the monitoring link is obtained.

in a first alternative implementation, the fault location device determines whether there is a link fault in the monitored link by detecting an optical power loss of the service optical signal in at least a part of the monitored link. The process comprises the following steps:

and B1, acquiring the optical power loss of at least part of the monitoring links passed by the service optical signals.

When a link failure occurs in a monitoring link, a large insertion loss generally exists on the monitoring link, and when the link has a large insertion loss, rayleigh scattered light signals distributed on an optical fiber cannot be detected, so that the insertion loss of the link cannot be obtained through the change of the intensity of the rayleigh scattered light signals. In the embodiment of the application, whether a link fault exists in a monitoring link is detected by acquiring the optical power loss of at least part of links in the monitoring link through which a service optical signal passes. Thereby achieving effective detection of link failure. Optionally, the at least part of the link is usually an intersection of the monitoring link and a service transmission link, where the service transmission link is a link for transmitting a service optical signal in the optical network device.

For example, the fault location device may obtain a link formed by at least two single boards and a backplane in the monitoring link, and detect whether a link fault exists in the monitoring link by monitoring optical power loss of a service optical signal passing through the link.

Fig. 12 is a schematic application environment diagram of a fault location apparatus 40 according to an embodiment of the present application, where the fault location apparatus 40 includes a reflected light detection module 401, a processing module 402, and a traffic light detection module (also referred to as a signal light detection module) 403. Wherein the functions of the reflected light detection module 401 and the processing module 402 refer to the functions of the corresponding modules in fig. 7. The service light detection module 403 is configured to monitor optical power loss of a service light signal passing through a link in the optical network device. Fig. 12 assumes that the service optical signal passes through the backplane of the optical network device and 2 single boards, the service optical detection module 403 is configured to monitor optical power loss of the service optical signal passing through the backplane of the optical network device and 2 single boards.

The foregoing process of the service Optical detection module 403 monitoring the Optical power loss of the service Optical signal passing through the link in the Optical network device may refer to an Optical Performance Monitoring (OPM) technology, an Optical Channel Monitoring (OCM) technology, or a pilot Optical power detection technology.

Optionally, the optical power loss is a difference between optical powers detected at an output end of a first board and an output end of a last board through which a service optical signal passes in the monitoring link. Thus, the optical power loss monitoring of the complete path of the link through which the service optical signal passes in the link can be realized. For example, in fig. 12, the service light detection module 403 is configured to obtain a difference between optical powers at output ends of 2 single boards.

And B2, determining that the link fault exists in the monitoring link after determining that the optical power loss is larger than the optical power loss threshold value.

When the optical power loss is greater than the optical power loss threshold, it indicates that the loss of the service optical signal in at least part of the link is large, and the large loss may be caused by the link failure existing in the monitored link, and therefore, it is determined that the link failure exists in the monitored link. And when the optical power loss is not greater than the optical power loss threshold, the loss of the service optical signal in at least part of the links is smaller, and the possibility of the link fault is lower, so that the monitored link is determined to have no link fault.

the fault positioning device sends an optical signal to the loop, receives the optical signal passing through the loop, determines the insertion loss of the loop through the sent optical signal and the received optical signal, and determines whether a link fault exists in the loop based on the insertion loss. For example, when the insertion loss is larger than the insertion loss threshold value, determining that the link fault exists in the loop, and based on the determination, monitoring the link to have the link fault; and when the insertion loss is not larger than the insertion loss threshold value, determining that the loop does not have link failure, and determining that the monitoring link does not have link failure based on the determination.

In this embodiment of the present application, the process of acquiring the location of the fault point on the optical network device in the monitoring link includes:

and C1, acquiring the light intensity of a reflection peak generated by the monitoring link reflecting the monitoring optical signal.

The fault locating device can obtain a relation curve of the monitoring link, and the light intensity of each reflection peak is obtained based on the relation curve.

And C2, sequentially comparing the light intensity of the reflection peak corresponding to the monitoring link with a preset target light intensity (also called initial light intensity) according to the sequence of the transmission direction from first to last until the light intensity of a certain reflection peak is determined not to be matched with the target light intensity, and determining the position corresponding to a certain reflection peak in the monitoring link as the position of the fault point in the monitoring link.

Since the positions of the optical devices of the same monitoring link are fixed, the positions of the reflection peaks on the obtained relationship curve of the monitoring link are not changed (or the position change is smaller than the acceptable error range). When the fault locating device detects a fault point, the light intensity of the reflection peak corresponding to the monitoring link is compared with the preset target light intensity in sequence according to the sequence of the transmission direction from first to last, namely the sequence of the reflection peak on the relation curve from first to last so as to determine the position of the fault point in the monitoring link.

In this embodiment, the light intensity of the reflection peak may be represented by a height of the reflection peak on the relationship curve (also referred to as an actual relationship curve) actually monitored in step C1, and the target light intensity of the reflection peak may be represented by a height of the reflection peak in a target relationship curve previously acquired by the fault locating device. The process of sequentially comparing the light intensity of the reflection peak corresponding to the monitoring link with the preset target light intensity may include a process of comparing the actual relationship curve of the monitoring link obtained through actual monitoring with a pre-obtained target relationship curve corresponding to the monitoring link.

Assuming that the first reflection peak is any one of the reflection peaks in the relationship curve, there are various ways to compare the light intensity of the first reflection peak with the target light intensity to determine the location of the fault point in the monitored link, and the embodiment of the present application is described by taking the following two ways as examples:

in the first way, the position of the fault point in the monitoring link is determined by comparing the light intensity difference of adjacent reflection peaks. The process comprises the following steps:

and D1, obtaining a first light intensity difference between the light intensity of the first reflection peak and the light intensity of a second reflection peak, wherein the second reflection peak comprises a reflection peak positioned before and/or after the first reflection peak.

Wherein when the second reflection peak includes a previous reflection peak located at the first reflection peak, the first light intensity difference includes a light intensity difference between the first reflection peak and the previous reflection peak; when the second reflection peak includes a subsequent reflection peak located at the first reflection peak, the first light intensity difference includes a light intensity difference of the first reflection peak and the subsequent reflection peak.

And D2, acquiring a second light intensity difference between the target light intensity of the first reflection peak and the target light intensity of the second reflection peak.

Wherein when the second reflection peak includes a previous reflection peak located at the first reflection peak, the second light intensity difference includes a difference between the light intensity of the first reflection peak and a target light intensity of the previous reflection peak; when the second reflection peak includes a subsequent reflection peak located at the first reflection peak, the second light intensity difference includes a light intensity difference of the first reflection peak and a target light intensity difference of the subsequent reflection peak.

D3, when the absolute value of the difference value between the first light intensity difference and the second light intensity difference is larger than the first absolute value threshold, determining that the position corresponding to the first reflection peak in the monitoring link is the position of the fault point.

Wherein, when the second reflection peak includes a previous reflection peak located at the first reflection peak, a case that an absolute value of a difference between the first light intensity difference and the second light intensity difference is greater than a first absolute value threshold satisfies: | x1-x2| > q; where x1 represents the difference between the light intensity of the first reflection peak and the light intensity of the previous reflection peak, x2 represents the difference between the target light intensity of the first reflection peak and the target light intensity of the previous reflection peak, and q is a first absolute threshold. When the second reflection peak includes a reflection peak located after the first reflection peak, a case where an absolute value of a difference between the first light intensity difference and the second light intensity difference is greater than a first absolute value threshold satisfies: y1-y2 > q; where y1 represents the difference between the light intensity of the first reflection peak and the light intensity of the latter reflection peak, y2 represents the difference between the target light intensity of the first reflection peak and the target light intensity of the latter reflection peak, and q is the first absolute threshold.

It should be noted that, when the second reflection peak includes a previous reflection peak and a subsequent reflection peak located at the first reflection peak, the condition that the absolute value of the difference between the first light intensity difference and the second light intensity difference is greater than the first absolute value threshold at least satisfies: | x1-x2| q, and | y1-y2| q.

It should be noted that when | x1-x2| > q and | y1-y2| > q, the point indicating that the fault actually occurs is the point corresponding to the first reflection peak; when | x1-x2| is greater than q and | y1-y2| is less than or equal to q, the point of actual fault is indicated as the point between the first reflection peak and the previous reflection peak, but in order to mark the point of actual fault, the point corresponding to the first reflection peak and the previous reflection peak are respectively taken as the fault points; when | x1-x2| ≦ q, and | y1-y2| > q, it is described that the point at which the failure actually occurs is a point between the first reflection peak and the next reflection peak, but in order to mark the point at which the failure actually occurs, the point corresponding to the first reflection peak and the point corresponding to the next reflection peak are respectively taken as failure points. Therefore, in the subsequent process, if the fault locating device outputs the device identifiers of two fault points, and the optical devices indicated by the two device identifiers are adjacent on the monitoring link, it indicates that the actual fault point appears between the optical devices indicated by the two device identifiers, for example, on an optical fiber.

Taking fig. 12 as an example, assume that the difference between the light intensity of the reflection peak 5 and the light intensity of the reflection peak 4 is a1, and the difference between the target light intensity of the reflection peak 5 and the target light intensity of the reflection peak 4 is a 2; the difference between the light intensity of the reflection peak 5 and the light intensity of the reflection peak 6 is B1, and the difference between the target light intensity of the reflection peak 5 and the target light intensity of the reflection peak 6 is B2. And if the absolute value of the first light intensity difference and the absolute value of the second light intensity difference corresponding to the reflection peak 5 are larger than the first absolute value threshold, the reflection peak 5 is determined to be the position of the fault point if the absolute value of the | A1-A2| is larger than q and/or the | B1-B2| is larger than q. If the | A1-A2| is greater than q and the | B1-B2| is greater than q, the position corresponding to the reflection peak 5 is the position of a fault point; if the absolute value of A1-A2 is greater than q and the absolute value of B1-B2 is less than or equal to q, the corresponding positions of the reflection peak 4 and the reflection peak 5 are the positions of fault points; if the | A1-A2| is less than or equal to q and the | B1-B2| is more than q, the corresponding positions of the reflection peak 5 and the reflection peak 6 are the positions of fault points.

And D4, when the absolute value of the difference value between the first light intensity difference and the second light intensity difference is not larger than the first absolute value threshold value, determining that the position corresponding to the first reflection peak in the monitoring link is not the position of the fault point (namely, the position of the normal point).

Wherein, when the second reflection peak includes a previous reflection peak located at the first reflection peak, a case where an absolute value of a difference between the first light intensity difference and the second light intensity difference is not greater than a first absolute value threshold satisfies: q is less than or equal to | x1-x2 |; where x1 represents the difference between the light intensity of the first reflection peak and the light intensity of the previous reflection peak, x2 represents the difference between the target light intensity of the first reflection peak and the target light intensity of the previous reflection peak, and q is a first absolute threshold. When the second reflection peak includes a reflection peak located after the first reflection peak, a case where an absolute value of a difference between the first light intensity difference and the second light intensity difference is not greater than a first absolute value threshold satisfies: q is less than or equal to | y1-y2 |; where y1 represents the difference between the light intensity of the first reflection peak and the light intensity of the latter reflection peak, y2 represents the difference between the target light intensity of the first reflection peak and the target light intensity of the latter reflection peak, and q is the first absolute threshold.

It should be noted that, when the second reflection peak includes a previous reflection peak and a subsequent reflection peak located at the first reflection peak, the condition that the absolute value of the difference between the first light intensity difference and the second light intensity difference is not greater than the first absolute value threshold is satisfied at the same time: q is less than or equal to | x1-x2|, and q is less than or equal to | y1-y2 |.

In the second way, the position of the fault point in the monitoring link is determined by comparing the light intensity difference of the reflection peaks at the same position. The process comprises the following steps:

and E1, obtaining the light intensity of the first reflection peak and the target light intensity of the first reflection peak.

And E2, when the absolute value of the obtained difference is larger than a second absolute value threshold, determining the position corresponding to the first reflection peak in the monitoring link as the position of the fault point.

And E3, when the absolute value of the obtained difference is not larger than the second absolute value threshold, determining that the position corresponding to the first reflection peak in the monitoring link is not the position of the fault point.

It should be noted that, when a fault point occurs in the monitoring link, due to the action of the fault point, the heights of the reflection peaks corresponding to the positions after the fault point decrease in the same ratio, and the absolute value of the difference between the light intensity and the target light intensity is greater than the second absolute value threshold. Thus, in the second mode, after a fault point is detected, the subsequent reflection peaks are no longer compared in terms of intensity, thus reducing the redundant comparison process.

It should be noted that, in general, when the actual relationship curve corresponding to the monitoring link and the target relationship curve are obtained, the emitted light intensities of the monitoring optical signals are the same. However, if the emitted light intensities of the monitored optical signals are different, the actual relationship curve may shift integrally relative to the target relationship curve, and at this time, the failure point determination result obtained by the second method may have a problem. Therefore, the failure point determination result of the first manner is more accurate than that of the second manner.

The target light intensity of each reflection peak can be recorded by the fault locating device in advance, and the target light intensity is obtained when the link fault does not occur in the monitoring link. For example, after installing each single board included in the monitoring link on the optical network device, the fault locating device obtains a target light intensity of each reflection peak generated by the monitoring link reflecting the monitoring optical signal; and stores the acquired target light intensity. The fault locating device can send monitoring optical signals to the monitoring link, receive monitoring optical signals reflected by the link in the optical network equipment, and determine the light intensity of the received optical signals. And the fault positioning device generates a target relation curve according to the light intensity of the received monitoring light signal and the determined position of the reflection point corresponding to the light intensity in the link, and acquires the target light intensity of each reflection peak in the target relation curve. The structure of the fault locating device can refer to the aforementioned fig. 8, and the generation process of the relationship curve can also refer to the corresponding process in fig. 8.

S303, determining the device identifier of the fault point based on the position of the fault point in the monitoring link and the corresponding relation between the position and the device identifier.

And the fault positioning device inquires the corresponding relation between the position and the device identifier based on the position of the fault point in the monitoring link, and determines the inquired device identifier as the device identifier of the fault point.

And S304, outputting the device identification of the fault point.

The fault location device can output alarm information, the alarm information is used for indicating a user to monitor the link to have link fault, and the alarm information comprises a device identification. Therefore, the user can quickly find out the optical device with the fault based on the device identification, and then the optical device is repaired or replaced.

It should be noted that the fault location device may monitor a plurality of monitoring links, each monitoring link may store a corresponding target relationship curve in advance, and after a fault point on a certain monitoring link is monitored, the output alarm information may further include a link identifier of the monitoring link in which the fault occurs. This facilitates the user to distinguish between actually failing monitoring links.

In this embodiment of the present application, when a fault point occurs in a monitoring link of an optical network device, a fault location device may directly determine, based on the above steps, whether the fault point is an optical fiber splice or a single board (whether the fault point occurs on an optical fiber may also be determined by using the foregoing steps D1 to D4), and output an identifier of the determined optical device, thereby implementing efficient maintenance or replacement of the optical device by a user, and implementing effective location of the fault point.

In a related art, after determining that a link failure exists in an optical network device, a secondary inspection may be performed manually, and the position of a failure point may be determined through manual experience. On the one hand, the positioning accuracy of the fault point is lower, and on the other hand, the labor cost is increased. In another related technique, the length of the optical fiber in the backplane of the optical network device is calibrated to assist in locating the fault point, and the calibration process is complicated.

In the embodiment of the application, the fault positioning device can directly report the fault optical device without manual secondary inspection, so that the fault maintenance time of a monitoring link in optical network equipment is reduced, and the labor cost is saved. In addition, the embodiment of the application is implemented based on the hardware structure of the existing optical network equipment, extra calibration on the optical fiber of the backboard is not needed, and the robustness is high. The fault positioning method is simple and convenient to implement, can realize automatic fault positioning of the monitoring link, and does not need manual intervention.

It should be noted that, the order of the steps of the fault location method provided in the embodiment of the present application may be appropriately adjusted, and the steps may also be increased or decreased according to the circumstances, and any method that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application, and therefore, the details are not described again. For example, the foregoing S301 may be performed after S302, but it is usually performed before S302, so that after the monitoring of the link failure in the monitored link, the device identification of the failure point may be determined quickly, and the time delay for positioning the failure point may be reduced.

In the embodiment of the present application, the fault locating apparatus may be integrated in the optical network device; the fault locating device can also be a monitoring board which can be inserted in the optical network equipment. When the fault location device is a monitoring board, the monitoring link may include the monitoring board or may not include the monitoring board, and the following two cases are described in the embodiments of the present application, respectively:

in the first case, the monitoring link comprises a monitoring board. For example, the monitoring board is located at a beginning portion of the monitoring link, and may send a monitoring optical signal to the monitoring link in the optical network device, a single board in the monitoring link except for the monitoring board is generally a WSS service board, and a cascade network formed by a plurality of WSS service boards is a link actually required to be monitored in the monitoring link. As shown in fig. 4, the monitoring board is the single board 1, and the

single boards

2 and 3 are WSS service boards. Correspondingly, the obtained relation curve comprises the reflection peak corresponding to the monitoring plate. As an example, the reflection peaks 1 to 4 of the relationship curves shown in fig. 9 to 11 are reflection peaks corresponding to the optical structure in the monitoring panel.

In the second case, the monitoring link does not include a monitoring board. For example, the monitoring board is connected to a beginning portion of the monitoring link, and may send a monitoring optical signal to the monitoring link in the optical network device, where a single board in the monitoring link is usually a WSS service board, and the monitoring link is a cascade network formed by a plurality of WSS service boards. As shown in fig. 4, the single board 1, the single board 2, and the single board 3 in the monitoring link are all WSS service boards. Correspondingly, the obtained relation curve does not include the reflection peak corresponding to the monitoring plate. As an example, the relationship curve obtained removes the first 4 reflection peaks relative to the previous fig. 9-11.

Fig. 13 is a block diagram of a fault location apparatus 50 according to an embodiment of the present application, where the apparatus 50 includes:

a location obtaining module 501, configured to obtain a location of a failure point on an optical network device in a monitoring link; a determining module 502, configured to determine a device identifier of the failure point based on a position of the failure point in the monitoring link and a correspondence between the position and the device identifier, where the correspondence between the position and the device identifier is a correspondence between positions of a plurality of optical devices in the monitoring link and device identifiers of the plurality of optical devices; the optical network device includes a backplane and at least two boards, where the correspondence between the location and the device identifier is established based on at least two reference links determined by changing a connection relationship between the at least two boards in the optical network device and the backplane, and the at least two reference links include at least part of links of the monitoring link.

To sum up, the fault location apparatus provided in this embodiment of the present application can determine, based on the correspondence between the positions and the device identifiers established by the at least two reference links determined by changing the connection relationship between the at least two boards and the backplane in the optical network device, and after the position acquisition module detects that the fault point occurs in the monitoring link, the determination module determines the device identifier of the fault point based on the position of the fault point in the monitoring link and the correspondence between the position and the device identifier. Therefore, the optical device at the fault point can be determined based on the device identification of the fault point, and effective fault location is realized.

Fig. 14 is a block diagram of another fault location device 50 provided in the embodiment of the present application, where the device 50 includes:

the switching module 503 is configured to change a connection relationship between the at least two boards and the backplane in the optical network device, so as to determine the at least two reference links. An establishing module 504, configured to establish the corresponding relationship based on the at least two reference links.

Optionally, the optical network device includes a plurality of optical fiber splices for connecting the backplane and the boards, the monitoring link includes the m-1 pairs of optical fiber splices and m boards connected by the m-1 pairs of optical fiber splices, each pair of optical fiber splices in the m-1 pairs of optical fiber splices includes a first optical fiber splice and a second optical fiber splice, the first optical fiber splice and the second optical fiber splice in the monitoring link are adjacent to each other, and m is an integer greater than 1.

Fig. 15 is a block diagram of an establishing module 504 according to an embodiment of the present application, where the establishing module 504 includes:

a first determining submodule 5041 for determining the location of the m-1 pair of optical fiber splices in the monitoring link based on the at least two reference links; a second determining submodule 5042, configured to determine, based on the positions of the m-1 pairs of optical fiber splices, the positions of the m boards in the monitoring link; an obtaining submodule 5043, configured to obtain the device identifier of the m-1 pair of optical fiber connectors and the device identifiers of the m single boards; establishing a sub-module 5044, configured to establish the corresponding relationship based on the positions of the m-1 pair of optical fiber connectors, the positions of the m single boards, the device identifiers of the m-1 pair of optical fiber connectors, and the device identifiers of the m single boards.

In an optional implementation manner, the at least two reference links are divided into: m-1 reference link groups, each reference link group comprising a plurality of reference links, wherein, in the ith reference link group: each reference link comprises at least i +1 single boards connected with the backboard, each reference link comprises a part of the link where the first i single boards of the monitoring link are located, the i +1 th single boards of the multiple reference links are different, and i is more than or equal to 1 and less than or equal to m-1.

Wherein the first determining sub-module 5041 is configured to: acquiring m-1 relation curve groups corresponding to the m-1 reference link groups one by one, wherein each reference link corresponds to one relation curve, and each relation curve is used for reflecting the relation between the light intensity of the monitored optical signal reflected by the point on the corresponding reference link and the position of the point on the corresponding reference link; if the difference between the maximum value and the minimum value in the position distribution range of the tth reflection peak of a plurality of relation curves in the ith relation curve group is larger than a preset difference value, determining the corresponding position of the tth reflection peak in the monitoring link as the position of a second optical fiber connector, wherein t is larger than 1; and determining the position corresponding to the t-1 th reflection peak in the monitoring link as the position of a first optical fiber connector.

Optionally, the position obtaining module 501 is configured to: and after determining that the monitoring link has link failure, acquiring the position of a failure point on the optical network equipment in the monitoring link.

Fig. 16 is a block diagram of another fault location device 50 provided in the embodiment of the present application, where the device 50 includes:

an optical power loss obtaining module 505, configured to obtain optical power loss of at least part of links in the monitoring links through which the service optical signal passes; a failure determining module 506, configured to determine that a link failure exists in the monitored link after determining that the optical power loss is greater than the optical power loss threshold.

For example, the optical power loss is a difference between optical powers detected at an output end of a first board and an output end of a last board through which the service optical signal passes in the monitoring link.

In this embodiment of the present application, the position obtaining module 501 is configured to: acquiring the light intensity of a reflection peak generated by the monitoring link reflecting the monitoring optical signal; and sequentially comparing the light intensity of the reflection peak corresponding to the monitoring link with preset target light intensity according to the sequence of the transmission direction from first to last so as to determine the position of a fault point in the monitoring link.

Fig. 17 is a block diagram of another fault location device 50 provided in the embodiment of the present application, where the device 50 further includes:

a light intensity obtaining module 507, configured to obtain a target light intensity of each reflection peak generated by the monitoring link reflecting the monitored optical signal after each single board included in the monitoring link is installed on the optical network device; and a storage module 508 for storing the acquired target light intensity.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and in actual implementation, there may be other divisions, for example, multiple modules or components may be combined or integrated into another module, or some features may be omitted, or not executed. For example, the fault locating device provided by the embodiment of the present application may be as shown in fig. 7 or fig. 12. Illustratively, the aforementioned light intensity obtaining module 507 is integrated in the reflected light detecting module 401; the position obtaining module 501, the determining module 502, the switching module 503, the establishing module 504, the fault determining module 506 and the storing module 508 are integrated in the processing module 402; the aforementioned optical power loss acquisition module 505 is integrated in the traffic light detection module 403.

Fig. 18 is a possible basic hardware architecture of the fault location device provided in the embodiment of the present application. Referring to fig. 18, the fault locating device 600 includes a processor 601, a memory 602, a communication interface 603, and a bus 604.

In the fault location device 600, the number of the processors 601 may be one or more, and fig. 18 only illustrates one of the processors 601. Alternatively, the processor 601 may be a CPU. If the fault locating device 600 has multiple processors 601, the types of the multiple processors 601 may be different, or may be the same. Optionally, the plurality of processors 601 of the fault locating device 600 may also be integrated as a multi-core processor.

Memory 602 stores computer instructions and data; the memory 602 may store computer instructions and data necessary to implement the fault location methods provided herein, e.g., the memory 602 stores instructions for implementing the steps of the fault location methods. The memory 602 may be any one or any combination of the following storage media: nonvolatile memory (e.g., Read Only Memory (ROM), Solid State Disk (SSD), hard disk (HDD), optical disk), volatile memory.

The communication interface 603 may be any one or any combination of the following devices: a network interface (e.g., an ethernet interface), a wireless network card, etc. having a network access function.

The communication interface 603 is used for the fault location device 600 to communicate data with other fault location devices or terminals.

The bus 604 may connect the processor 601 with the memory 602 and the communication interface 603. Thus, via bus 604, processor 601 may access memory 602 and may also utilize communication interface 603 for data interaction with other fault locating devices or terminals.

In the present application, the fault locating device 600 executes computer instructions in the memory 602, so that the fault locating device 600 implements the fault locating method provided by the present application.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as a memory comprising instructions, executable by a processor of a fault location device to perform a fault location method as shown in various embodiments of the present application is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the module described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product comprising one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium, or a semiconductor medium (e.g., solid state disk), among others.

The embodiment of the application provides a fault positioning system, which comprises optical network equipment and a fault positioning device. The optical network equipment may be OXC equipment, or dense networking equipment similar to the OXC equipment, which uses a backplane to implement cross-connection between boards. The fault locating device may be any one of the fault locating devices described in the previous embodiments, for example, the fault locating device shown in any one of fig. 7, 12, 13, 14, 16 to 18.

It is worth mentioning that the fault locating device may be integrated in the optical network device; the fault locating device can also be a monitoring board which can be inserted in the optical network equipment.

In this application, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "at least one" means 1 or more, and the term "plurality" means two or more unless explicitly defined otherwise. A refers to B and refers to the simple variation where A is the same as B or A is B. Wavelength channel a corresponds to wavelength channel B, meaning that the wavelengths of wavelength channel a and wavelength channel B are the same. In the previous embodiments of the present application, "wavelength" refers to optical wavelength, and "power" refers to optical power.

It should be noted that: in the fault location method, the fault location device provided in the foregoing embodiment is only illustrated by dividing the functional modules, and in practical applications, the above function allocation may be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the above described functions. In addition, the fault locating device and the fault locating method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiments and are not described herein again.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method of fault location, the method comprising:

acquiring the position of a fault point on optical network equipment in a monitoring link;

determining the device identifier of the fault point based on the position of the fault point in the monitoring link and the corresponding relationship between the position and the device identifier, wherein the corresponding relationship between the position and the device identifier is the corresponding relationship between the positions of the plurality of optical devices in the monitoring link and the device identifiers of the plurality of optical devices;

the optical network device includes a backplane and at least two boards, where the correspondence between the location and the device identifier is established based on at least two reference links determined by changing a connection relationship between the at least two boards in the optical network device and the backplane, where the at least two reference links include at least part of links of the monitoring links.

2. The method of claim 1, further comprising:

changing the connection relationship between the at least two single boards and the backplane in the optical network equipment to determine the at least two reference links;

and establishing the corresponding relation based on the at least two reference links.

3. The method according to claim 2, wherein the optical network device includes a plurality of optical fiber splices for connecting the backplane with the single boards, the monitoring link includes m-1 pairs of optical fiber splices, and m single boards connected by the m-1 pairs of optical fiber splices, each pair of optical fiber splices in the m-1 pairs of optical fiber splices includes a first optical fiber splice and a second optical fiber splice, the first optical fiber splice and the second optical fiber splice in the monitoring link are adjacent, and m is an integer greater than 1;

the establishing the corresponding relationship based on the at least two reference links includes:

determining the positions of the m-1 pairs of optical fiber splices in the monitoring link based on the at least two reference links;

determining the positions of the m single boards in the monitoring link based on the positions of the m-1 optical fiber joints;

acquiring the device identification of the m-1 pair of optical fiber joints and the device identification of the m single plates;

and establishing the corresponding relation based on the positions of the m-1 pair of optical fiber joints, the positions of the m single boards, the device identifications of the m-1 pair of optical fiber joints and the device identifications of the m single boards.

4. The method of claim 3, wherein the at least two reference links are divided into: m-1 reference link groups, each reference link group comprising a plurality of reference links, wherein, in the ith reference link group: each reference link comprises at least i +1 single boards connected with the backboard, each reference link comprises a part of the link where the first i single boards of the monitoring link are located, the i +1 th single boards of the multiple reference links are different, and i is more than or equal to 1 and less than or equal to m-1.

5. The method of claim 4, wherein said determining the location of said m-1 pair of fiber optic splices in said monitoring link based on said at least two reference links comprises:

acquiring m-1 relation curve groups corresponding to the m-1 reference link groups one by one, wherein each reference link corresponds to one relation curve, and each relation curve is used for reflecting the relation between the light intensity of the monitored optical signal reflected by the corresponding point on the reference link and the position of the corresponding point on the reference link;

if the difference between the maximum value and the minimum value in the position distribution range of the tth reflection peak of a plurality of relation curves in the ith relation curve group is larger than a preset difference value, determining the corresponding position of the tth reflection peak in the monitoring link as the position of a second optical fiber connector, wherein t is larger than 1;

and determining the position corresponding to the t-1 th reflection peak in the monitoring link as the position of a first optical fiber connector.

6. The method according to any of claims 1 to 5, wherein the obtaining the location of the failure point on the optical network device in the monitoring link comprises:

and after determining that the monitoring link has link failure, acquiring the position of a failure point on the optical network equipment in the monitoring link.

7. The method of claim 6, further comprising:

acquiring optical power loss of at least part of links in the monitoring links through which the service optical signals pass;

and determining that the link fault exists in the monitoring link after determining that the optical power loss is greater than an optical power loss threshold.

8. The method according to claim 7, wherein the optical power loss is a difference between optical powers detected at an output end of a first board and an output end of a last board through which the service optical signal passes in the monitoring link.

9. The method according to any of claims 1 to 8, wherein the obtaining the location of the failure point on the optical network device in the monitoring link comprises:

acquiring the light intensity of a reflection peak generated by the monitoring link reflecting the monitoring optical signal;

and sequentially comparing the light intensity of the reflection peak corresponding to the monitoring link with a preset target light intensity according to the sequence of the transmission direction from first to last so as to determine the position of a fault point in the monitoring link.

10. The method of claim 9, further comprising:

after each single board included in the monitoring link is installed on the optical network equipment, acquiring the target light intensity of each reflection peak generated by the monitoring link reflecting the monitoring optical signal;

and storing the acquired target light intensity.

11. A fault locating device, characterized in that the device comprises:

the position acquisition module is used for acquiring the position of a fault point on the optical network equipment in a monitoring link;

a determining module, configured to determine a device identifier of the failure point based on a position of the failure point in the monitoring link and a correspondence between the position and the device identifier, where the correspondence between the position and the device identifier is a correspondence between positions of a plurality of optical devices in the monitoring link and device identifiers of the plurality of optical devices;

the optical network device includes a backplane and at least two boards, where the correspondence between the location and the device identifier is established based on at least two reference links determined by changing a connection relationship between the at least two boards in the optical network device and the backplane, and the at least two reference links include at least part of the links of the monitoring links.

12. The apparatus of claim 11, further comprising:

a switching module, configured to change a connection relationship between the at least two boards and the backplane in the optical network device, so as to determine the at least two reference links;

and the establishing module is used for establishing the corresponding relation based on the at least two reference links.

13. The apparatus according to claim 12, wherein the optical network device includes a plurality of optical fiber splices for connecting the backplane to the boards, the monitoring link includes m-1 pairs of optical fiber splices, and m boards connected by the m-1 pairs of optical fiber splices, each pair of optical fiber splices in the m-1 pairs of optical fiber splices includes a first optical fiber splice and a second optical fiber splice, the first optical fiber splice and the second optical fiber splice in the monitoring link are adjacent, and m is an integer greater than 1; the establishing module comprises:

a first determining submodule for determining the positions of the m-1 pairs of optical fiber splices in the monitoring link based on the at least two reference links;

a second determining submodule, configured to determine positions of the m boards in the monitoring link based on the positions of the m-1 pairs of optical fiber connectors;

the obtaining submodule is used for obtaining the device identification of the m-1 pair of optical fiber connectors and the device identification of the m single plates;

and the establishing submodule is used for establishing the corresponding relation based on the positions of the m-1 pair of optical fiber connectors, the positions of the m single boards, the device identifications of the m-1 pair of optical fiber connectors and the device identifications of the m single boards.

14. The apparatus of claim 13, wherein the at least two reference links are divided into: m-1 reference link groups, each reference link group comprising a plurality of reference links, wherein, in the ith reference link group: each reference link comprises at least i +1 single boards connected with the backboard, each reference link comprises a part of the link where the first i single boards of the monitoring link are located, the i +1 th single boards of the multiple reference links are different, and i is more than or equal to 1 and less than or equal to m-1.

15. The apparatus of claim 14, wherein the first determining submodule is configured to:

if the difference between the maximum value and the minimum value in the position distribution range of the tth reflection peak of a plurality of relation curves in the ith relation curve group is larger than a preset difference value, determining the position corresponding to the tth reflection peak in the monitoring link as the position of a second optical fiber connector, wherein t is larger than 1;

16. The apparatus according to any one of claims 11 to 15, wherein the position obtaining module is configured to:

17. The apparatus of claim 16, further comprising:

the optical power loss acquisition module is used for acquiring the optical power loss of at least part of links in the monitoring links through which the service optical signals pass;

and the fault determining module is used for determining that the link fault exists in the monitoring link after the optical power loss is determined to be larger than the optical power loss threshold.

18. The apparatus according to claim 17, wherein the optical power loss is a difference between optical powers detected at an output end of a first board and an output end of a last board through which the service optical signal passes in the monitoring link.

19. The apparatus according to any one of claims 11 to 18, wherein the position acquiring module is configured to:

20. The apparatus of claim 19, further comprising:

a light intensity obtaining module, configured to obtain a target light intensity of each reflection peak generated by the monitoring link reflecting the monitored optical signal after each single board included in the monitoring link is installed on the optical network device;

and the storage module is used for storing the acquired target light intensity.

21. A fault locating device, characterized in that the device comprises:

a processor and a memory;

the memory stores computer instructions; the processor executes the computer instructions stored by the memory to cause the fault locating device to perform the fault locating method of any of claims 1 to 10.

22. A computer-readable storage medium having computer instructions stored therein, the computer instructions instructing a computer device to perform the fault location method of any one of claims 1 to 10.

23. A chip comprising programmable logic circuitry and/or program instructions for performing the fault location method of any of claims 1 to 10 when the chip is in operation.

24. A fault location system, comprising: optical network equipment and a fault location device according to any of claims 11 to 20.