CN113949445A

CN113949445A - Detection method and network equipment

Info

Publication number: CN113949445A
Application number: CN202010692073.7A
Authority: CN
Inventors: 龙运; 常志文; 陈飞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2022-01-18

Abstract

The embodiment of the invention discloses a detection method and network equipment, which are used for detecting whether a target optical fiber connected between a source optical switching device and a host optical switching device is in a conducting state or not, and effectively improving the accuracy and efficiency of detection. The method provided by the embodiment of the invention comprises the following steps: transmitting a probe optical signal to a target path, the target path including source optical switching means and sink optical switching means, the target path further including a target optical fiber connected between the source optical switching means and the sink optical switching means; receiving a plurality of reflected light signals from the target path, the plurality of reflected light signals reflecting the probe light signal for the target path to form; and if the target reflected light signals exist in the plurality of reflected light signals, determining that the target optical fiber is in a conducting state, wherein the target reflected light signals are reflected light signals reflected by the target optical fiber.

Description

Detection method and network equipment

Technical Field

The present application relates to the field of optical communications, and in particular, to a detection method and a network device.

Background

With the rapid development of the 5th generation mobile communication technology (5G), Virtual Reality (VR), and other big data technologies, the data traffic in the network increases rapidly, and the network transmission capacity also increases, especially the transmission capacity of the optical transport network. The network equipment for realizing the exchange of the optical signals in the optical transmission network comprises a plurality of source optical exchange devices and sink optical exchange devices for exchanging the optical signals, wherein the source optical exchange devices and the sink optical exchange devices are connected through optical fibers.

It can be seen that, in the case that the network device includes a plurality of source optical switching devices and a plurality of sink optical switching devices, the optical fiber connection in the network device is complex, and in order to detect whether the optical fiber is in a normal conducting state, the rayleigh scattering curve of each optical fiber can be obtained, so as to determine whether each optical fiber is in a normal conducting state according to the rayleigh scattering curve.

However, the detection of whether the optical fiber is in a normal conduction state is performed through the rayleigh scattering curve, so that the operation is complicated, and the accuracy is low.

Disclosure of Invention

The embodiment of the application provides a detection method and network equipment, which are used for detecting whether a target optical fiber connected between a source optical switching device and a sink optical switching device is in a conducting state or not, and can effectively improve the accuracy and efficiency of detection.

A first aspect of the present application provides a detection method, including: transmitting a probe optical signal to a target path, the target path including source optical switching means and sink optical switching means, the target path further including a target optical fiber connected between the source optical switching means and the sink optical switching means; receiving a plurality of reflected light signals from the target path, the plurality of reflected light signals reflecting the probe light signal for the target path to form; and if the target reflected light signals exist in the plurality of reflected light signals, determining that the target optical fiber is in a conducting state, wherein the target reflected light signals are reflected light signals reflected by the target optical fiber.

Therefore, the detection method disclosed by the invention is adopted, the target optical fiber is not required to be subjected to complex calibration, the operation complexity of the target optical fiber is effectively reduced, and the detection efficiency is improved. And the target optical fiber is detected based on the target reflected light signal reflected by the target optical fiber, so that in the detection process of whether the target optical fiber is in the conduction state, the detection accuracy of whether the target optical fiber is in the conduction state can not be influenced without depending on the environment (such as temperature, vibration and the like) where the network equipment is located, namely the change of the environment where the target optical fiber is located, thereby effectively improving the detection accuracy of the target optical fiber and effectively improving the detection robustness.

Based on the first aspect, in an optional implementation manner, the target path further includes a detection unit connected to the source board, where the detection unit is configured to send the detection optical signal to the target path, and if it is determined that a target reflected optical signal exists in the plurality of reflected optical signals, determining that the target optical fiber is in a conducting state includes: acquiring a reflection spectrum, wherein the reflection spectrum comprises the corresponding relation between the amplitude and the distance of any one of the plurality of reflected light signals, and the distance of the reflected light signal is the distance between the position for reflecting the any one of the reflected light signals in the target path and the detection unit; determining in the reflection spectrum whether the target reflected light signal is present; and if so, determining that the target optical fiber is in a conducting state.

Therefore, whether a target reflected light signal reflected by the target optical fiber exists or not is determined through the reflection spectrum, the accuracy of detecting whether the target optical fiber is in a conducting state or not is effectively improved, the detection process does not need to depend on the change of the environment where the target optical fiber is located, and the detection robustness is improved.

Based on the first aspect, in an optional implementation manner, the determining whether the target reflected light signal exists in the reflection spectrum includes: acquiring the length of the target optical fiber; and if two reflected light signals meeting a preset condition are determined to exist in the reflection spectrum, determining that the target reflected light signal exists, wherein the preset condition is that the positions of the two reflected light signals in the reflection spectrum are adjacent, and the distance between the two reflected light signals corresponds to the length of the target optical fiber.

Based on the first aspect, in an optional implementation manner, the determining whether the target reflected light signal exists in the reflection spectrum includes: acquiring a fiber connection relation list, wherein the fiber connection relation list comprises the lengths of optical fibers connected between different source light exchange devices and different host light exchange devices, and the lengths of any two optical fibers in the fiber connection relation list are different; and if two reflected light signals meeting a preset condition are determined to exist in the reflection spectrum, determining that the target reflected light signal exists, wherein the preset condition is that the positions of the two reflected light signals in the reflection spectrum are adjacent, and the distance between the two reflected light signals corresponds to the length of one optical fiber included in the fiber connection relation list.

Based on the first aspect, in an optional implementation manner, the method includes: determining a distance maximum in the reflection spectrum, the distance maximum being a maximum in distances between the plurality of reflected light signals and the detection unit; and if the maximum distance value is smaller than the length of the target path, triggering and executing the step of determining that the target optical fiber is in a conducting state if the target reflected optical signal exists in the plurality of reflected optical signals.

Therefore, when the network device acquires the reflection spectrum of the target path, it is not directly detected whether the target optical fiber included in the target path is in a conducting state, but it is detected whether the maximum distance value in the reflection spectrum is smaller than the length of the target path, and only when the maximum distance value in the reflection spectrum is smaller than the length of the target path, it is indicated that the target path has a fault point, the network device can detect the target path with the fault point determined, so that the network device can avoid repeatedly detecting the target path without the fault point, and further the network device can only detect the target path with the fault point, thereby effectively improving the detection efficiency.

Based on the first aspect, in an optional implementation manner, the target optical fiber is located on an optical backplane, and lengths of different optical fibers on the optical backplane are different.

Therefore, even if the optical backplane is provided with the high-density optical fibers, the network device can accurately detect whether each optical fiber on the optical backplane is in a conducting state based on the detection method disclosed by the application under the condition that the lengths of different optical fibers on the optical backplane are different.

Based on the first aspect, in an optional implementation manner, the detection unit is an optical time domain reflectometer OFDR or an optical time domain reflectometer OTDR.

A second aspect of the present application provides a network device comprising at least one target path, the target path comprising source optical switching means and sink optical switching means, the target path further comprising a target optical fiber connected between the source optical switching means and the sink optical switching means; the network equipment further comprises a detection unit and a processor connected with the detection unit; the detection unit is used for sending a detection optical signal to the target path; the detection unit is further configured to receive a plurality of reflected light signals from the target path, where the plurality of reflected light signals are formed by reflecting the detection light signal for the target path; the processor is configured to determine that the target optical fiber is in a conducting state if it is determined that a target reflected light signal exists in the plurality of reflected light signals, where the target reflected light signal is a reflected light signal reflected by the target optical fiber.

The network device in this aspect is configured to execute the detection method in the first aspect, and please refer to the description in the first aspect for details, which is not described herein.

Based on the second aspect, in an optional implementation manner, the detection unit and the processor are integrated on the same board, and the detection unit is connected to each source light switching device included in the network device, or the detection unit is integrated on the source light switching device.

Based on the second aspect, in an optional implementation manner, the processor is specifically configured to: acquiring a reflection spectrum, wherein the reflection spectrum comprises the corresponding relation between the amplitude and the distance of any one of the plurality of reflected light signals, and the distance of the reflected light signal is the distance between the position for reflecting the any one of the reflected light signals in the target path and the detection unit; determining in the reflection spectrum whether the target reflected light signal is present; and if so, determining that the target optical fiber is in a conducting state.

Based on the second aspect, in an optional implementation manner, the processor is specifically configured to: acquiring the length of the target optical fiber; and if two reflected light signals meeting a preset condition are determined to exist in the reflection spectrum, determining that the target reflected light signal exists, wherein the preset condition is that the positions of the two reflected light signals in the reflection spectrum are adjacent, and the distance between the two reflected light signals corresponds to the length of the target optical fiber.

Based on the second aspect, in an optional implementation manner, the processor is specifically configured to: acquiring a fiber connection relation list, wherein the fiber connection relation list comprises the lengths of optical fibers connected between different source light exchange devices and different host light exchange devices, and the lengths of any two optical fibers in the fiber connection relation list are different; and if two reflected light signals meeting a preset condition are determined to exist in the reflection spectrum, determining that the target reflected light signal exists, wherein the preset condition is that the positions of the two reflected light signals in the reflection spectrum are adjacent, and the distance between the two reflected light signals corresponds to the length of one optical fiber included in the fiber connection relation list.

Based on the second aspect, in an optional implementation manner, the processor is further configured to: determining a distance maximum in the reflection spectrum, the distance maximum being a maximum in distances between the plurality of reflected light signals and the detection unit; and if the maximum distance value is smaller than the length of the target path, triggering and executing the step of determining that the target optical fiber is in a conducting state if the target reflected optical signal exists in the plurality of reflected optical signals.

Based on the second aspect, in an optional implementation manner, the network device further includes an optical backplane, the target optical fiber is located on the optical backplane, and lengths of different optical fibers on the optical backplane are different.

Based on the second aspect, in an optional implementation manner, the detection unit is an optical time domain reflectometer OFDR or an optical time domain reflectometer OTDR.

In a third aspect of the embodiments of the present application, a digital processing chip is provided, where the chip includes a processor and a memory. The memory and the processor are interconnected through a line, instructions are stored in the memory, and the processor is as shown in any one of the second aspect, and the description of the beneficial effects is given above and is not repeated.

A fourth aspect of embodiments of the present application provides a computer-readable storage medium, comprising instructions that, when executed on a computer, cause the computer to perform the method of any one of the first aspects described above.

Drawings

Fig. 1 is a diagram illustrating a first example of a network device according to the present application;

FIG. 2 is a flow chart illustrating the steps of a first exemplary embodiment of a detection method provided herein;

FIG. 3 is a diagram illustrating an example of a reflectance spectrum provided herein;

FIG. 4 is a flowchart illustrating steps of a second exemplary embodiment of a detection method provided herein;

FIG. 5 is a flow chart illustrating steps of a third exemplary embodiment of a detection method provided herein;

fig. 6 is a diagram illustrating a second example of a network device provided in the present application;

fig. 7 is a diagram illustrating a third exemplary structure of a network device according to the present application.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

To better understand the detection method provided by the present application, the following first describes a structure of a network device to which the method shown in the present application is applied with reference to fig. 1, where fig. 1 is a structural example diagram of a first embodiment of the network device provided by the present application:

the present embodiment does not limit the type of the network device, as long as the network device can realize the exchange of optical signals in the optical transport network, for example, the network device may be an optical cross-connect (OXC) or a reconfigurable optical add/drop multiplexer (ROADM), and the present embodiment takes the example of the network device as the OXC for example.

As shown in fig. 1, the network device 100 includes N source optical switching apparatuses (i.e., the source optical switching apparatuses 110, 111 to 11N shown in fig. 1), and the network device 100 further includes M sink optical switching apparatuses (i.e., the sink

optical switching apparatuses

120, 121 to 12M shown in fig. 1). In this embodiment, specific values of N and M are not limited, as long as N and M are positive integers greater than or equal to 1, where N is equal to 32 and M is equal to 32 as an example for exemplary description, it is clear that the network device provided in this embodiment includes 32 source optical switching apparatuses and 32 sink optical switching apparatuses.

In this embodiment, the specific device types of the source optical switch device and the sink optical switch device are not limited, and may be, for example, liquid crystal on silicon (LCoS), Micro Electro Mechanical Systems (MEMS), Liquid Crystal (LC), or mode crystal.

The network device 100 further includes an Optical Backplane (OB) 130 located between the source optical switching apparatus and the sink optical switching apparatus. The optical backplane 130 is a printed fiber board integrating a large number of optical fibers. For example, the output port 141 of the source optical switch 110 shown in fig. 1 is connected to the input port 143 of the sink optical switch 120 through the optical fiber 142 on the optical backplane 130, and thus, when the source optical switch 110 needs to switch an optical signal to the sink optical switch 120, the source optical switch can transmit the optical signal output from the output port 141 to the input port 143 through the optical fiber 142 to be input to the sink optical switch 120.

As can be seen from the description of fig. 1, as the number of source optical switching devices and sink optical switching devices integrated in the network device 100 increases, the number of output ports of each source optical switching device and the number of input ports of each sink optical switching device increase. The greater the number of optical fibers integrated on the optical backplane 130, the greater the density of connections. In order to normally realize the switching of each optical signal, the network device 100 needs each optical fiber on the optical backplane 130 to be in a normal conducting state, so as to effectively ensure that each source optical switch apparatus can switch the optical signal to a corresponding sink optical switch apparatus via different optical fibers on the optical backplane 130.

In order to accurately detect whether each optical fiber on the optical backplane 130 is in a conducting state, an Optical Frequency Domain Reflectometer (OFDR) unit is integrated in the monitoring board 150 according to an existing scheme. The monitoring board 150 prestores an initial rayleigh scattering curve of each optical fiber on the optical backplane 130, and when the optical backplane 130 needs to be detected, the OFDR unit of the monitoring board 150 sends a probe optical signal to each optical fiber on the optical backplane 130 through each source optical switching device, and generates a corresponding rayleigh scattering curve to be detected according to a reflected optical signal reflected by each optical fiber, the monitoring board 150 performs a cross-correlation operation on the initial rayleigh scattering curve and the rayleigh scattering curve to be detected corresponding to each optical fiber, and identifies whether each optical fiber on the optical backplane 130 is in a conducting state according to a result of the cross-correlation operation, and the following describes a defect of the existing scheme:

because the initial rayleigh scattering curves of the optical fibers on the optical backplane 130 need to be obtained in advance, a large amount of operations need to be performed on the optical backplane 130 in advance, the operation process is complicated, and the initial rayleigh scattering curves of the optical fibers on the optical backplane 130 need to be stored, which occupies a storage space. The rayleigh scattering curve of the optical fiber strongly depends on the change of the environment (such as temperature, vibration, etc.), and in the process of detecting each optical fiber on the optical back plate 130 to obtain the rayleigh scattering curve to be detected, the environment of the optical fiber in the process of detecting each time can not be guaranteed to be consistent, so that the accuracy of detecting whether the optical fiber is in a conducting state or not is greatly reduced. And the detection of whether the optical fiber is in a conducting state or not is determined through cross-correlation operation, a large amount of computing resources of a monitoring single board need to be consumed, and the detection efficiency of whether the optical fiber is in a conducting state or not is reduced.

However, the detection method provided by the present application can accurately detect whether the optical fiber connected between the source optical switching device and the sink optical switching device is in a conducting state, and can effectively improve the detection efficiency and save the storage space of the network device, the following describes an implementation process of the detection method shown in the present embodiment with reference to fig. 2, where fig. 2 is a first embodiment step flow chart of the detection method provided by the present application:

step 201, the network device sends a probe optical signal to a target path.

First, the target route is explained:

in this embodiment, the target path includes a source optical switch device and a sink optical switch device, and an optical fiber connected between the source optical switch device and the sink optical switch device, and continuing with fig. 1 as an example, the target path may include a source optical switch device 110, a target optical fiber 142, and a sink optical switch device 120. In this embodiment, the target optical fiber 142 is exemplified as an optical fiber printed on the optical backplane 130, and in other examples, the source optical switch 110 and the sink optical switch 120 may not be provided with the optical backplane 130, but may be independent optical fibers directly connected between the source optical switch 110 and the sink optical switch 120.

It should be clear that, in this embodiment, an example is given that a target path includes two optical switching devices (i.e., a source optical switching device and a sink optical switching device) connected to each other, in other examples, the target path may also include more than two optical switching devices, any two adjacent optical switching devices included in the target path are connected by an optical fiber, and a process of detecting an optical fiber connected between any two adjacent optical switching devices included in the target path may refer to a process of detecting an optical fiber connected between a source optical switching device and a sink optical switching device shown in this embodiment.

Next, several optional ways for the network device to send the probe optical signal to the target path are described:

mode 1

As shown in fig. 1, the monitoring board 150 may integrate a detection unit 101, where the detection unit 101 is an OFDR or an Optical Time Domain Reflectometer (OTDR), the detection unit 101 is connected to each source optical switch device through a first optical fiber, and as shown in fig. 1, the detection unit 101 is connected to the source optical switch device 110 through a first optical fiber 161. For example, if it is necessary to detect the conduction of the target optical fiber 142 between the source switch 110 and the sink switch 120, the source switch 110 can connect the path between the input port 144 and the output port 141, and the probe optical signal from the probe unit 101 is received at the input port 144 via the first optical fiber 161, and can be transmitted to the target optical fiber 142 via the output port 141, and the transmission path of the probe optical signal is, as a rule, sequentially via the probe unit 101, the first optical fiber 161, the input port 144, the output port 141, the target optical fiber 142, and the input port 143. Please refer to the process of sending the detection optical signal to the target optical fiber 142, which is not described herein.

In this embodiment, an example is given by taking the detection unit located in the monitoring board.

The monitoring board 150 shown in this embodiment is used for an integrated chip or an integrated circuit to implement a processing function related to the detection method provided in this embodiment, for example, the monitoring board 150 may integrate one or more field-programmable gate arrays (FPGAs), Application Specific Integrated Chips (ASICs), system on chips (socs), Central Processing Units (CPUs), Network Processors (NPs), digital signal processing circuits (DSPs), Micro Controllers (MCUs), Programmable Logic Devices (PLDs) or other integrated chips, or any combination of the above chips or processors.

Mode 2

In this manner, the detection unit may be located on a board different from the monitoring board, or the detection unit is disposed in the network device in an independent module, as long as the detection unit is connected to the monitoring board, so that information interaction between the detection unit and the monitoring board can be performed, and the detection unit can send the detection optical signal to any optical fiber included in the optical backplane.

Mode 3

In this embodiment, the detection unit may be disposed in each source optical switch device, and if the conduction condition of the target optical fiber needs to be detected, the detection unit in the source optical switch device connected to the target optical fiber may be used to transmit the detection optical signal to the target optical fiber, where the process of transmitting the detection optical signal in this embodiment is also referred to as in embodiment 1, and is not described in detail. Therefore, by means of the mode 3, whether the target optical fibers included in the multiple target paths are in the conducting state can be detected synchronously, and therefore the detection efficiency of whether the target optical fibers are in the conducting state is improved.

Step 202, the network device receives a plurality of reflected light signals from the target path.

Specifically, as shown in step 201, the detection unit is configured to send the detection light signal to a target path, and during transmission of the detection light signal along the target path, the optical fiber located between the detection unit and the source light exchange device, the optical fiber in the source light exchange device, the target optical fiber located on the light backplane, and the optical fiber located on the sink light exchange device generate emission light signals based on different refractive indexes, and transmit the emission light signals to the detection unit.

Step 203, the network device acquires the reflection spectrum.

In this embodiment, an example that the detection unit acquires the reflection spectrum according to a plurality of reflected light signals reflected by the target path is taken as an example, which is not limited to this, for example, the detection unit may also send the acquired plurality of reflected light signals to the monitoring single board, and the monitoring single board acquires the reflection spectrum according to the plurality of reflected light signals.

The reflection spectrum is described below with reference to fig. 3:

as shown in fig. 3, the reflection spectrum is located in a two-dimensional coordinate system, the abscissa of the two-dimensional coordinate system is distance and has a unit of meter (m), and the ordinate of the two-dimensional coordinate system is amplitude and has a unit of decibel (dB), specifically, the reflection spectrum includes a corresponding relationship between the amplitude of any one of the plurality of reflected light signals reflected by the target path and the distance of the reflected light signal, and the distance of the reflected light signal is a distance between a position in the target path for reflecting the any one of the reflected light signals and the detection unit.

Taking fig. 3 as an example, the reflected light signal 301 in the reflection spectrum is a reflected light signal reflected by the input port when the detection light signal is transmitted to the input port of the source light exchanging device in the target path. It can be seen that the abscissa of the reflected light signal 301 represents the distance between the input port of the source light exchange device and the detection unit, while the ordinate of the reflected light signal 301 represents the amplitude of the reflected light signal 301.

Step 204, the network device obtains a fiber connection relation list.

In this embodiment, the execution sequence between step 204 and steps 201 to 203 is not limited, optionally, the monitoring board of the network device shown in this embodiment may execute step 204 in advance before executing steps 201 to 203 to obtain a fiber connection relationship list, where the fiber connection relationship list includes lengths of optical fibers connected between different source optical switching devices and different sink optical switching devices, for better understanding, the following description is made with reference to table 1, where table 1 is an illustration of a fiber connection relationship series shown in this embodiment.

TABLE 1

With reference to fig. 1 and table 1, the fiber connection relation list shown in table 1 includes the length of the optical fiber between any source optical switch device and any sink optical switch device connected, for example, L11 represents the length of the optical fiber connected between the source optical switch device 110 and the sink optical switch device 120, and the length is 500mm, and so on, LNM represents the length of the optical fiber connected between the source optical switch device 11N and the sink optical switch device 12M, and the length is 2546 mm. It can be seen that, in the fiber connection relation list shown in this embodiment, the lengths of any two different optical fibers are different.

Specifically, since the optical backplane is produced by a high-precision wiring machine, the precision of the length of the optical fiber on the optical backplane is high, so that the length of the optical fiber stored in the fiber connection relation list is equal to or approximately equal to the actual length of the optical fiber on the optical backplane.

Step 205, the network device determines the length of the target optical fiber in the fiber connection relation list.

In this embodiment, in order to detect the conduction condition of the target optical fiber in the target path, the monitoring board may determine the length of the target optical fiber in the fiber connection relationship list, for example, if the monitoring board determines that the target optical fiber to be tested is an optical fiber connected between the source optical switching device 11N and the sink optical switching device 12M, the monitoring board may determine that the length LNM of the target optical fiber is 2546mm by querying the fiber connection relationship list.

Step 206, the network device determines whether a target reflection optical signal exists in the reflection spectrum, if not, step 207 is executed, and if so, step 208 is executed.

In this embodiment, when the monitoring board obtains the reflection spectrum and the length of the target optical fiber, step 206 may be executed to determine whether the target optical fiber is in a conducting state.

Specifically, the monitoring board determines whether a reflected light signal reflected by the target optical fiber exists in the reflection spectrum, if so, it indicates that the target optical fiber can successfully transmit the detection light signal, and if the target reflected light signal has been successfully reflected to the detection unit, it indicates that the target optical fiber is in a conducting state. If not, the target optical fiber cannot successfully transmit the detection optical signal, and cannot successfully reflect the target reflection optical signal to the detection unit, and the target optical fiber is in a fault state.

The following describes how the monitoring board determines the target reflected light signal in the reflection spectrum:

in this embodiment, the monitoring board may determine whether two reflected light signals meeting a preset condition exist in the reflection spectrum, if yes, the monitoring board determines that the two reflected light signals meeting the preset condition are the target reflected light signals, and if not, the monitoring board determines that the target reflected light signals do not exist in the reflection spectrum.

The preset condition is that the positions of the two reflected light signals in the reflection spectrum are adjacent, and the distance between the two reflected light signals corresponds to the length of the target optical fiber.

Continuing with the description shown in fig. 3, the monitoring board acquires a distance between any two adjacent reflected light signals in the reflection spectrum, for example, the monitoring board acquires the reflected light signal 302 and the reflected light signal 303 which are adjacent to each other in position in the reflection spectrum, the monitoring board then acquires a distance 304 between the reflected light signal 302 and the reflected light signal 303, where the distance 304 is a difference between an abscissa corresponding to the reflected light signal 302 and an abscissa corresponding to the reflected light signal 303, the monitoring board determines whether the distance 304 is equal to the length of the target optical fiber, if so, it indicates that the target reflected light signal (i.e., the reflected light signal 302 and the reflected light signal 303) exists in the reflection spectrum, and if not, it indicates that the target reflected light signal does not exist in the reflection spectrum.

Alternatively, continuing with the reflected light signal 302 and the reflected light signal 303 as an example, when the monitoring board determines whether the reflected light signal 302 and the reflected light signal 303 satisfy the preset condition, as long as the length of the target optical fiber is equal to or approximately equal to the distance 304, the monitoring board may determine that the reflected light signal 302 and the reflected light signal 303 satisfy the preset condition, for example, when the distance 304 is 2486.5mm and the length L11 of the target optical fiber is 2486mm, the monitoring board may also determine that the reflected light signal 302 and the reflected light signal 303 satisfy the preset condition, and further determine that the target optical fiber with the length LN2 is in a conductive state. The present embodiment does not limit the degree of approximate equality, and for example, in the case where the difference between the distance 304 and the length of the target optical fiber is less than or equal to 1mm, approximate equality can be determined.

Step 207, the network device generates a first prompt message.

In this embodiment, when the monitoring board of the network device determines that there is no reflected light signal reflected by the target optical fiber in the reflection spectrum, it may be determined that the target optical fiber is in a non-conductive fault state, and the monitoring board may generate first prompt information for indicating the fault state of the target optical fiber.

And step 208, the network equipment generates second prompt information.

When the monitoring board of the network device determines that the reflected light signal reflected by the target optical fiber exists in the reflection spectrum, it may be determined that the target optical fiber is in the conducting state, and then the monitoring board may generate second prompt information for indicating that the target optical fiber is in the conducting state.

The following explains the advantageous effects of the detection method shown in this embodiment:

by adopting the method shown in the embodiment, the optical fibers connected between the source optical switching device and the sink optical switching device do not need to be calibrated in a complex way (for example, the rayleigh scattering curve of each optical fiber needs to be acquired in the existing scheme), and only the physical length of each optical fiber on the optical back plate needs to be acquired, so that the operation complexity of preprocessing the optical fibers on the optical back plate is effectively reduced, and the detection efficiency is improved.

In the embodiment, the target reflected light signal reflected by the target optical fiber is positioned based on the reflection spectrum, and the target optical fiber can be determined to be in the conducting state when the target reflected light signal exists in the reflection spectrum, so that in the detection process of whether the target optical fiber is in the conducting state, the detection accuracy of whether the target optical fiber is in the conducting state cannot be influenced without depending on the environment (such as temperature, vibration and the like) where the network equipment is located, namely, the change of the environment where the network equipment is located, and therefore, the accuracy of detecting the target optical fiber is effectively improved, and the detection robustness is effectively improved.

By adopting the method shown in the embodiment, the target optical fiber with the fault can be accurately positioned, so that maintenance personnel can effectively maintain the target optical fiber in a non-conduction state, the maintainability of network equipment is enhanced, the maintenance efficiency is improved, and the accuracy and the efficiency of the maintenance personnel in positioning the fault of the target optical fiber with the fault are improved.

Another embodiment of the detection method provided by the present application is described below with reference to fig. 4, where fig. 4 is a flowchart illustrating steps of a second embodiment of the detection method provided by the present application.

Step 401, the network device sends a probe optical signal to the target path.

Step 402, the network device receives a plurality of reflected light signals from the target path.

Step 403, the network device acquires the reflection spectrum.

Step 404, the network device obtains a fiber connection relation list.

For a description of the execution process from step 401 to step 404 shown in this embodiment, please refer to the description from step 201 to step 204 shown in fig. 2 in detail, which is not repeated herein.

Step 405, the network device determines whether a target reflected light signal exists in the reflection spectrum, if not, step 406 is executed, and if so, step 407 is executed.

In this embodiment, when the monitoring board obtains the reflection spectrum and the connection relation list, step 405 may be executed to determine whether the target optical fiber is in a conducting state.

The preset condition is that the positions of the two reflected light signals in the reflection spectrum are adjacent, and the distance between the two reflected light signals corresponds to the length of one optical fiber included in the fiber connection relation list.

Continuing with the description shown in fig. 3, the monitoring board acquires a distance between any two adjacent reflected light signals in the reflection spectrum, for example, the monitoring board acquires the reflected light signal 302 and the reflected light signal 303 which are adjacent to each other in position in the reflection spectrum, the monitoring board then acquires a distance 304 between the reflected light signal 302 and the reflected light signal 303, where the distance 304 is a difference between an abscissa corresponding to the reflected light signal 302 and an abscissa corresponding to the reflected light signal 303, the monitoring board determines whether the distance 304 is stored in the fiber connection relationship list, if so, it indicates that a target reflected light signal (i.e., the reflected light signal 302 and the reflected light signal 303) exists in the reflection spectrum, and if not, it indicates that the target reflected light signal does not exist in the reflection spectrum.

Optionally, continuing to take the reflected optical signal 302 and the reflected optical signal 303 as an example, when determining whether the reflected optical signal 302 and the reflected optical signal 303 satisfy the preset condition, the monitoring board may determine that the reflected optical signal 302 and the reflected optical signal 303 satisfy the preset condition only when determining that a certain length is equal to or approximately equal to the distance 304 in the fiber connection relation list, and refer to fig. 2 for an explanation of approximately equal length, which is not described again.

Step 406, the network device generates a first prompt message.

Step 407, the network device generates a second prompt message.

For details of the specific execution process from step 406 to step 407 shown in this embodiment, please refer to step 207 to step 208 shown in fig. 2, which is not described in detail.

By adopting the detection method shown in the embodiment, the monitoring single board can directly determine whether the target optical fiber is in a conducting state according to the fiber connection relation list and the reflection spectrum, the length of the target optical fiber does not need to be acquired separately in advance, and the detection efficiency is further improved.

As shown in fig. 1, when the network device includes a plurality of source optical switching devices and a plurality of sink optical switching devices, there are many optical fibers on the optical backplane 130, and the detection method shown in the present application can be sequentially executed on the plurality of optical fibers to detect whether the plurality of optical fibers included in the optical backplane are in a conducting state one by one. For another example, the detection method shown in the present application may be randomly executed on a plurality of optical fibers included in the optical backplane, and specifically, without being limited in the present application, with reference to fig. 5, how to trigger detection on a certain optical fiber on the optical backplane is exemplarily described below, where fig. 5 is a flowchart of steps of a third embodiment of the detection method provided in the present application.

Step 501, the network device sends a probe optical signal to a target path.

Step 502, the network device receives a plurality of reflected light signals from the target path.

Step 503, the network device acquires the reflection spectrum.

The processes shown in steps 501 to 503 in this embodiment are shown in steps 201 to 203 in fig. 2 for details, and the specific execution process is not described again.

Step 504, the network device determines a distance maximum in the reflection spectrum.

As shown in fig. 3, the maximum distance is the maximum distance between the detection unit and the plurality of reflected light signals, and as can be seen from the maximum distance between the detection unit and the plurality of reflected light signals included in the reflection spectrum, the reflected light signal having the largest distance between the detection unit and the plurality of reflected light signals is the reflected light signal having the largest abscissa (i.e., the reflected light signal 304 shown in fig. 3).

Therefore, the maximum distance value can be determined by the monitoring single board of the network device according to the acquired reflection spectrum.

Step 505, the network device determines whether the maximum distance is smaller than the length of the target path, if not, step 506 is executed, and if yes, the process returns to step 501.

Specifically, the monitoring board shown in this embodiment may obtain lengths of paths in the network device in advance, where different paths refer to transmission paths including different source optical switching devices and different sink optical switching devices connected by optical fibers, and with reference to fig. 1, taking an example that a target path includes a detection unit 101, a source optical switching device 110, a target optical fiber 142, and a sink optical switching device 120 as an example, the length of the target path includes a sum of a length of a first optical fiber 161 connected between the detection unit 101 and the source optical switching device 110, a length of an optical fiber used for transmitting an optical signal from the first optical fiber 161 to an output port 141 in the source optical switching device 110, a length of the target optical fiber 142, and a length of an optical fiber used for transmitting an optical signal in the sink optical switching device 143.

If the network device determines that the maximum distance is smaller than the length of the target path, it indicates that the probe optical signal is transmitted to the end position of the target path, for example, the probe optical signal is not transmitted to the output port of the host optical switching device 143, it indicates that the target path has a fault point, for example, a fiber break, and the probe optical signal cannot be transmitted to the end position of the target route given to your user, and then the target path is detected by performing step 507.

If the network device determines that the maximum distance is equal to the length of the target path, it indicates that the probe optical signal can be transmitted to the end position of the target path, and it indicates that the transmission of the probe optical signal by the target path is normal, then the process returns to step 501, so that one target path is reselected in the network device for detection.

Step 506, the network device obtains the fiber connection relation list.

Step 507, the network device determines the length of the target optical fiber in the fiber connection relation list.

Step 508, the network device determines whether there is a target reflected light signal in the reflection spectrum, if not, step 509 is executed, and if yes, step 510 is executed.

Step 509, the network device generates the first prompt message.

Step 510, the network device generates a second prompt message.

For a description of the execution process from step 506 to step 510 shown in this embodiment, please refer to step 204 to step 208 shown in fig. 2 in detail, which is not described in detail in this embodiment.

It can be seen that, by using the method shown in this embodiment, the network device does not directly detect whether the target optical fiber included in the target path is in a conducting state or not when acquiring the reflection spectrum of the target path, but detects whether the maximum distance value in the reflection spectrum is smaller than the length of the target path, and only when the maximum distance value in the reflection spectrum is smaller than the length of the target path, it indicates that the target path has a fault point, and the network device can detect the target path where the fault point has been determined, so that the network device can avoid repeatedly detecting the target path where the fault point does not exist, and further the network device only detects the target path where the fault point exists, thereby effectively improving the detection efficiency.

The structure of the network device provided in the present application is described below with reference to fig. 6, where fig. 6 is a diagram illustrating a second embodiment of the network device provided in the present application;

as shown in fig. 6, the network device 600 includes a detection unit 621 and a processor 622 connected to the detection unit 621, and for a specific description of the detection unit, please refer to the above method embodiment in detail, which is not described in detail.

Optionally, the detecting unit 621 and the processor 622 may be integrated on the same monitoring board, and further optionally, the detecting unit 621 may be connected to the monitoring board integrated by the processor 622, for a specific description of the monitoring board, please refer to the above method embodiment for details, which is not described in detail.

The network device further includes at least one target path 610, where the target path 610 includes a source optical switching apparatus 611, a sink optical switching apparatus 612, and a target optical fiber 613 connected between the source optical switching apparatus 611 and the sink optical switching apparatus 612, and the number of the target paths 610 is not limited in this embodiment, for example, the network device includes one or more target paths 610, and for a specific description of the target paths, please refer to the method embodiments described above, which is not described in detail.

For the purpose that the detection unit 621 sends the detection light signal to the target path 610, the detection unit is connected to the source light exchanging device 611 through an optical fiber 623, and the detection unit 621 can send the detection light signal to the source light exchanging device 611 through the optical fiber 623.

Another structure of the network device provided in the present application is described below with reference to fig. 7, where fig. 7 is a structural example diagram of a third embodiment of the network device provided in the present application:

as shown in fig. 7, the network device 700 includes a processor 701, where the processor 701 shown in this embodiment is integrated on a monitoring board, and for a specific description of the monitoring board, please refer to the foregoing method embodiment in detail, which is not described in detail.

The network device shown in this embodiment further includes a target path 710, where the target path 710 includes a source optical switching apparatus 711, a sink optical switching apparatus 712, and a target optical fiber 713 connected between the source optical switching apparatus 711 and the sink optical switching apparatus 712, and the number of the target paths 710 is not limited in this embodiment, for example, the network device includes one or more target paths 710, and for a specific description of the target paths, please refer to the method embodiments described above, and details of the method embodiments are not repeated.

Specifically, the source light exchanging device 711 shown in this embodiment is integrated with the detecting unit 714, and the detecting unit 714 is connected to the processor 701, for detailed description of the detecting unit 714, please refer to the above method embodiments, which is not described in detail.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method of detection, the method comprising:

transmitting a probe optical signal to a target path, the target path including source optical switching means and sink optical switching means, the target path further including a target optical fiber connected between the source optical switching means and the sink optical switching means;

receiving a plurality of reflected light signals from the target path, the plurality of reflected light signals reflecting the probe light signal for the target path to form;

and if the target reflected light signals exist in the plurality of reflected light signals, determining that the target optical fiber is in a conducting state, wherein the target reflected light signals are reflected light signals reflected by the target optical fiber.

2. The method of claim 1, wherein the target path further comprises a detection unit connected to the source board, the detection unit configured to send the detection optical signal to the target path, and wherein determining that the target optical fiber is in the conducting state if it is determined that a target reflected optical signal exists in the plurality of reflected optical signals comprises:

acquiring a reflection spectrum, wherein the reflection spectrum comprises the corresponding relation between the amplitude and the distance of any one of the plurality of reflected light signals, and the distance of the reflected light signal is the distance between the position for reflecting the any one of the reflected light signals in the target path and the detection unit;

determining in the reflection spectrum whether the target reflected light signal is present;

and if so, determining that the target optical fiber is in a conducting state.

3. The method of claim 2, wherein said determining whether the target reflected light signal is present in the reflection spectrum comprises:

acquiring the length of the target optical fiber;

and if two reflected light signals meeting a preset condition are determined to exist in the reflection spectrum, determining that the target reflected light signal exists, wherein the preset condition is that the positions of the two reflected light signals in the reflection spectrum are adjacent, and the distance between the two reflected light signals corresponds to the length of the target optical fiber.

4. The method of claim 2, wherein said determining whether the target reflected light signal is present in the reflection spectrum comprises:

acquiring a fiber connection relation list, wherein the fiber connection relation list comprises the lengths of optical fibers connected between different source light exchange devices and different host light exchange devices, and the lengths of any two optical fibers in the fiber connection relation list are different;

and if two reflected light signals meeting a preset condition are determined to exist in the reflection spectrum, determining that the target reflected light signal exists, wherein the preset condition is that the positions of the two reflected light signals in the reflection spectrum are adjacent, and the distance between the two reflected light signals corresponds to the length of one optical fiber included in the fiber connection relation list.

5. The method according to any one of claims 2 to 4, characterized in that it comprises:

determining a distance maximum in the reflection spectrum, the distance maximum being a maximum in distances between the plurality of reflected light signals and the detection unit;

and if the maximum distance value is smaller than the length of the target path, triggering and executing the step of determining that the target optical fiber is in a conducting state if the target reflected optical signal exists in the plurality of reflected optical signals.

6. The method of any one of claims 1 to 5, wherein the target optical fiber is located on an optical backplane and wherein different optical fibers on the optical backplane have different lengths.

7. The method according to any of claims 1 to 6, characterized in that the detection unit is an optical time domain reflectometer OFDR or an optical time domain reflectometer OTDR.

8. A network device comprising at least one target path, said target path comprising source optical switching means and sink optical switching means, said target path further comprising a target optical fibre connected between said source optical switching means and said sink optical switching means; the network equipment further comprises a detection unit and a processor connected with the detection unit;

the detection unit is used for sending a detection optical signal to the target path;

the detection unit is further configured to receive a plurality of reflected light signals from the target path, where the plurality of reflected light signals are formed by reflecting the detection light signal for the target path;

the processor is configured to determine that the target optical fiber is in a conducting state if it is determined that a target reflected light signal exists in the plurality of reflected light signals, where the target reflected light signal is a reflected light signal reflected by the target optical fiber.

9. The network device according to claim 8, wherein the probe unit is integrated on a same board as the processor, and the probe unit is connected to each of the source optical switching apparatuses included in the network device, or the probe unit is integrated on the source optical switching apparatus.

10. The network device of claim 8 or 9, wherein the processor is specifically configured to:

and if so, determining that the target optical fiber is in a conducting state.

11. The network device of claim 10, wherein the processor is specifically configured to:

acquiring the length of the target optical fiber;

12. The network device of claim 10, wherein the processor is specifically configured to:

13. The network device of any of claims 10 to 12, wherein the processor is further configured to:

14. The network device of any one of claims 8 to 13, further comprising an optical backplane, wherein the target optical fiber is located on the optical backplane, and wherein different optical fibers on the optical backplane have different lengths.

15. The network device according to any of claims 8 to 14, wherein the probing unit is an optical time domain reflectometer OFDR or an optical time domain reflectometer OTDR.