A detection method and network device

Abstract

The embodiment of the present application discloses a detection method and network equipment, which is used for detecting whether the target optical fiber connected between the source optical switching device and the destination optical switching device is in the conducting state, and effectively improves the accuracy and efficiency of the detection. The method comprises the following steps: sending a probe light signal to a target path, wherein the target path comprises a source optical switching device and a destination optical switching device, and the target path further comprises a target optical fiber connected between the source optical switching device and the destination optical switching device; receiving a plurality of reflected light signals from the target path, wherein the plurality of reflected light signals are formed by the target path reflecting the probe light signal; and if it is determined that there is a target reflected light signal in the plurality of reflected light signals, it is determined that the target optical fiber is in the conducting state, wherein the target reflected light signal is a reflected light signal reflected by the target optical fiber.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical communication, and in particular to a detection method and a network device. BACKGROUND

[0002] With the rapid development of big data technologies such as the 5th generation mobile networks (5G) and virtual reality (VR), the data traffic in the network is rapidly increasing, and the network transmission capacity is also increasing, especially the transmission capacity of the optical transport network. A network device for implementing switching of optical signals in an optical transport network includes a plurality of source optical switching devices and sink optical switching devices for switching optical signals, and the source optical switching devices and the sink optical switching devices are connected by optical fibers.

[0003] It can be seen that in the case where 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 to determine whether each optical fiber is in a normal conducting state according to the Rayleigh scattering curve.

[0004] However, the detection of whether the optical fiber is in a normal conducting state by the Rayleigh scattering curve is tedious and has low accuracy. SUMMARY

[0005] The embodiments of the present application provide a detection method and a network device 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, and effectively improving the accuracy and efficiency of detection.

[0006] The first aspect of the present application provides a detection method, the method comprising: sending a probe optical signal to a target path, the target path including a source optical switching device and a sink optical switching device, the target path further including a target optical fiber connected between the source optical switching device and the sink optical switching device; receiving a plurality of reflected optical signals from the target path, the plurality of reflected optical signals being reflected by the target path from the probe optical signal; and if it is determined that there is a target reflected optical signal in the plurality of reflected optical signals, determining that the target optical fiber is in a conducting state, the target reflected optical signal being a reflected optical signal reflected by the target optical fiber.

[0007] It can be seen that the detection method shown in the aspect does not need to calibrate the target optical fiber, effectively reduces the operation complexity of the target optical fiber, and improves the detection efficiency. Moreover, the target optical fiber is detected based on the target reflection light signal reflected by the target optical fiber. It can be seen that in the detection process of whether the target optical fiber is in a conducting state, the change of the environment in which the target optical fiber is located does not affect the accuracy of the detection of whether the target optical fiber is in a conducting state, thereby effectively improving the accuracy of the detection of the target optical fiber, and effectively improving the robustness of the detection.

[0008] In an optional implementation based on the first aspect, the target path further includes a detection unit connected to the source plate, the detection unit being configured to send the detection light signal to the target path, and the determining that the target optical fiber is in a conducting state if the target reflection light signal exists in the plurality of reflection light signals includes: obtaining a reflection spectrum, the reflection spectrum including a corresponding relationship between the amplitude and the distance of any reflection light signal in the plurality of reflection light signals, the distance of the reflection light signal being a distance between a position in the target path for reflecting the any reflection light signal and the detection unit; determining whether the target reflection light signal exists in the reflection spectrum; and determining that the target optical fiber is in a conducting state if the target reflection light signal exists.

[0009] It can be seen that the target reflection light signal reflected by the target optical fiber is determined by the reflection spectrum, which effectively improves the accuracy of the detection of whether the target optical fiber is in a conducting state, and the change of the environment in which the target optical fiber is located is not needed in the detection process, thereby improving the robustness of the detection.

[0010] In an optional implementation based on the first aspect, the determining whether the target reflection light signal exists in the reflection spectrum includes: obtaining a length of the target optical fiber; and determining that the target reflection light signal exists if two reflection light signals satisfying a preset condition exist in the reflection spectrum, wherein the preset condition is that the positions of the two reflection light signals in the reflection spectrum are adjacent, and the distance between the two reflection light signals corresponds to the length of the target optical fiber.

[0011] In an optional implementation of the first aspect, the determining whether the target reflected optical signal exists in the reflection spectrum includes: obtaining a fiber connection relationship list, the fiber connection relationship list including lengths of optical fibers connected between different source optical switching devices and different sink optical switching devices, and any two optical fibers included in the fiber connection relationship list having different lengths; and determining that the target reflected optical signal exists if it is determined that two reflected optical signals satisfying a preset condition exist in the reflection spectrum, the preset condition being that the two reflected optical signals are adjacent in position in the reflection spectrum and a distance between the two reflected optical signals corresponds to a length of an optical fiber included in the fiber connection relationship list.

[0012] In an optional implementation of the first aspect, the method includes: determining a distance maximum in the reflection spectrum, the distance maximum being a maximum value of distances between the plurality of reflected optical signals and the probe unit; and triggering the step of determining that the target optical fiber is in the conducting state if it is determined that the distance maximum is less than a length of the target path.

[0013] It can be seen that, in the case that the network device obtains the reflection spectrum of the target path, the network device does not directly detect whether the target optical fiber included in the target path is in the conducting state, but first detects whether the distance maximum in the reflection spectrum is less than the length of the target path. Only in the case that the distance maximum in the reflection spectrum is less than the length of the target path, it is indicated that the target path has a fault point, and the network device can detect the target path in which the fault point has been determined to exist, thereby avoiding repeated detection of the target path in which no fault point exists by the network device, and further enabling the network device to detect only the target path in which the fault point exists, and effectively improving the detection efficiency.

[0014] In an optional implementation of the first aspect, the target optical fiber is located on an optical backboard, and lengths of different optical fibers on the optical backboard are different.

[0015] It can be seen that, even if high-density optical fibers are arranged on the optical backboard, the network device can accurately detect whether each optical fiber on the optical backboard is in the conducting state based on the detection method shown in the present application in the case that lengths of different optical fibers on the optical backboard are different.

[0016] In an optional implementation of the first aspect, the probe unit is an optical frequency domain reflectometer (OFDR) or an optical time domain reflectometer (OTDR).

[0017] The second aspect of the present application provides a network device, comprising at least one target path, the target path comprising a source optical switching device and a sink optical switching device, the target path further comprising a target optical fiber connected between the source optical switching device and the sink optical switching device; the network device further comprising a detection unit and a processor connected with the detection unit; the detection unit is configured to send a detection optical signal to the target path; the detection unit is further configured to receive a plurality of reflected optical signals from the target path, the plurality of reflected optical signals being formed by the target path reflecting the detection optical signal; the processor is configured to determine that the target optical fiber is in a conducting state if it is determined that there is a target reflected optical signal in the plurality of reflected optical signals, the target reflected optical signal being a reflected optical signal reflected by the target optical fiber.

[0018] The network device shown in the present aspect is used to execute the detection method shown in the first aspect, and the beneficial effects are described in the first aspect, which will not be repeated here.

[0019] Based on the second aspect, in an optional implementation, the detection unit and the processor are integrated on the same single board, the detection unit is connected with each source optical switching device included in the network device, or the detection unit is integrated on the source optical switching device.

[0020] Based on the second aspect, in an optional implementation, the processor is specifically configured to: obtain a reflection spectrum, the reflection spectrum comprising a correspondence between an amplitude and a distance of any reflected optical signal in the plurality of reflected optical signals, the distance of the reflected optical signal being a distance between a position in the target path for reflecting the any reflected optical signal and the detection unit; determine whether the target reflected optical signal exists in the reflection spectrum; and if so, determine that the target optical fiber is in a conducting state.

[0021] Based on the second aspect, in an optional implementation, the processor is specifically configured to: obtain a length of the target optical fiber; and if it is determined that there are two reflected optical signals satisfying a preset condition in the reflection spectrum, it is determined that the target reflected optical signal exists, wherein the preset condition is that the positions of the two reflected optical signals in the reflection spectrum are adjacent, and the distance between the two reflected optical signals corresponds to the length of the target optical fiber.

[0022] Based on the second aspect, in an optional implementation, the processor is specifically configured to: obtain a fiber connection list, the fiber connection list including the lengths of optical fibers connecting different source optical switching devices and different destination optical switching devices, and the lengths of any two optical fibers included in the fiber connection list are different; if it is determined that there are two reflected light signals in the reflection spectrum that satisfy a preset condition, then it is determined that there is a target reflected light signal, wherein the preset condition is that the two reflected light signals are adjacent in the reflection spectrum, and the distance between the two reflected light signals corresponds to the length of one optical fiber included in the fiber connection list.

[0023] Based on the second aspect, in an optional implementation, the processor is further configured to: determine a maximum distance value in the reflection spectrum, the maximum distance value being the maximum value among the distances between the plurality of reflected light signals and the detection unit; if it is determined that the maximum distance value is less than the length of the target path, then trigger the execution of the step of determining that the target optical fiber is in a conducting state if it is determined that a target reflected light signal exists among the plurality of reflected light signals.

[0024] Based on the second aspect, in an optional implementation, the network device further includes an optical backplane, the target optical fiber is located on the optical backplane, and the different optical fibers on the optical backplane have different lengths.

[0025] Based on the second aspect, in one optional implementation, the detection unit is an optical frequency domain reflectometer (OFDR) or an optical time domain reflectometer (OTDR).

[0026] A third aspect of this application provides a digital processing chip, which includes a processor and a memory. The memory and the processor are interconnected via a circuit. The memory stores instructions, and the processor is as described in any of the second aspects above. The beneficial effects are explained in the second aspect above and will not be repeated here.

[0027] A fourth aspect of this application provides a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method shown in any of the first aspects above. Attached Figure Description

[0028] Figure 1 This is a structural example diagram of a first embodiment of the network device provided in this application;

[0029] Figure 2 This is a flowchart illustrating the steps of a first embodiment of the detection method provided in this application;

[0030] Figure 3 An example diagram of one embodiment of the reflectance spectrum provided in this application;

[0031] Figure 4 This is a flowchart illustrating the steps of a second embodiment of the detection method provided in this application;

[0032] Figure 5 This is a flowchart of the steps of a third embodiment of the detection method provided in this application;

[0033] Figure 6 This is a structural example diagram of a second embodiment of the network device provided in this application;

[0034] Figure 7 This is a structural example diagram of a third embodiment of the network device provided in this application. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] To better understand the detection method provided in this application, the following will first combine... Figure 1 The diagram illustrates the structure of the network device to which the method described in this application is applied, wherein... Figure 1 Example structural diagram of a first embodiment of the network device provided in this application:

[0037] This embodiment does not limit the type of 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 can be an optical cross-connect (OXC) or a reconfigurable optical add / drop multiplexer (ROADM). This embodiment takes OXC as an example for illustrative explanation.

[0038] like Figure 1 As shown, the network device 100 includes N source optical switching devices (i.e., Figure 1 The network equipment 100, as shown, includes source optical switching devices 110, 111 to 11N, and further includes M destination optical switching devices (i.e., source optical switching devices 110, 111 to 11N). Figure 1The optical switching devices 120, 121 to 12M shown are described below. In this embodiment, the specific values ​​of N and M are not limited, as long as N and M are both positive integers greater than or equal to 1. In this embodiment, N equals 32 and M equals 32 as an example for illustration. It can be seen that the network equipment provided in this embodiment includes 32 source optical switching devices and 32 destination optical switching devices.

[0039] This embodiment does not limit the specific equipment types of the source optical switching device and the destination optical switching device. For example, they can be liquid crystal on silicon (LCoS), microelectromechanical systems (MEMS), liquid crystal (LC), or crystalline silicon.

[0040] The network device 100 also includes an optical backplane (OB) 130 located between the source optical switch and the destination optical switch. The OB 130 is a printed fiber optic board integrating a large number of optical fibers. The output port of the source optical switch, used for outputting optical signals, is connected to the input port of the destination optical switch, used for receiving optical signals, via an optical fiber on the OB 130. For example, Figure 1 The output port 141 of the source optical switching device 110 shown is connected to the input port 143 of the destination optical switching device 120 via the optical fiber 142 on the optical backplane 130. It can be seen that when the source optical switching device 110 needs to switch the optical signal to the destination optical switching device 120, the source optical switching device can transmit the optical signal output from the output port 141 to the input port 143 via the optical fiber 142, so as to input the destination optical switching device 120.

[0041] Depend on Figure 1 As illustrated, the more source and destination optical switches integrated into network device 100, the more output ports each source switch has and the more input ports each destination switch has. This results in a greater number of optical fibers integrated on the optical backplane 130, leading to a higher connection density. For network device 100 to function properly in switching various optical signals, all optical fibers on the optical backplane 130 must be in a normally conducting state. This effectively ensures that each source optical switch can switch optical signals via different optical fibers on the optical backplane 130 to its corresponding destination optical switch.

[0042] In order to accurately detect whether each optical fiber on the optical backboard 130 is in a conducting state, the prior scheme integrates an optical frequency domain reflectometer (OFDR) unit in the monitoring single board 150. The monitoring single board 150 pre-stores the initial Rayleigh scattering curve of each optical fiber on the optical backboard 130. In the case of needing to detect the optical backboard 130, the OFDR unit of the monitoring single board 150 sends a probe light signal to each optical fiber on the optical backboard 130 through each source light switching device, and generates a corresponding to-be-detected Rayleigh scattering curve according to the reflected light signal reflected by each optical fiber. The monitoring single board 150 performs cross-correlation operation on the initial Rayleigh scattering curve and the to-be-detected Rayleigh scattering curve corresponding to each optical fiber, and identifies whether each optical fiber on the optical backboard 130 is in a conducting state through the result of the cross-correlation operation. The defects of the prior scheme are described as follows:

[0043] Since the initial Rayleigh scattering curve of each optical fiber on the optical backboard 130 needs to be obtained in advance, a large number of operations need to be performed on the optical backboard 130 in advance, and the operation process is complicated. Moreover, the initial Rayleigh scattering curve of each optical fiber on the optical backboard 130 needs to be stored, which occupies storage space. The Rayleigh scattering curve of the optical fiber is strongly dependent on environmental changes (such as temperature, vibration, etc.). During the detection of each optical fiber on the optical backboard 130 to obtain the to-be-detected Rayleigh scattering curve, it is impossible to ensure that the environment during the detection of the optical fiber each time is consistent, which greatly reduces the accuracy of the detection of whether the optical fiber is in a conducting state. Moreover, the detection of whether the optical fiber is in a conducting state through cross-correlation operation needs to consume a large amount of computing resources of the monitoring single board, which reduces the efficiency of the detection of whether the optical fiber is in a conducting state.

[0044] The detection method provided in the present application can accurately detect whether the optical fiber connected between the source light switching device and the sink light switching device is in a conducting state, and can effectively improve the detection efficiency and save the storage space of the network equipment. The execution process of the detection method of the embodiment is described below with reference to FIG. 8. Figure 2 The first embodiment of the detection method provided in the present application is shown in the flowchart of FIG. 8. Figure 2 The first embodiment of the detection method provided in the present application is shown in the flowchart of FIG. 8.

[0045] Step 201: The network equipment sends a probe light signal to a target path.

[0046] Firstly, the target path is described.

[0047] In the embodiment, the target path includes a source light switching device and a sink light switching device, and an optical fiber connected between the source light switching device and the sink light switching device. The target path is taken as an example and described as follows. Figure 1As shown in the example, the target path may include a source optical switching device 110, a target optical fiber 142, and a destination optical switching device 120. This embodiment uses the target optical fiber 142 as an example of an optical fiber printed on the optical backplane 130. In other examples, the source optical switching device 110 and the destination optical switching device 120 may not have an optical backplane 130, but may be directly connected to each other via independent optical fibers.

[0048] It should be clarified that this embodiment uses the example of a target path including two interconnected optical switching devices (i.e., a source optical switching device and a destination optical switching device) for illustrative purposes. 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 optical fibers. The process of detecting the optical fibers connecting any two adjacent optical switching devices included in the target path can be found in the process of detecting the optical fibers connecting the source optical switching device and the destination optical switching device shown in this embodiment.

[0049] Secondly, several optional methods for network devices to send probe optical signals to the target path are explained:

[0050] Method 1

[0051] like Figure 1 As shown, the monitoring board 150 can integrate a detection unit 101, wherein the detection unit 101 is an OFDR or an optical time domain reflectometer (OTDR), and the detection unit 101 is connected to each source optical switching device through a first optical fiber, such as... Figure 1 As shown, the detection unit 101 is connected to the source optical switching device 110 via the first optical fiber 161. For example, if it is necessary to detect the continuity of the target optical fiber 142 between the source switching device 110 and the destination optical switching device 120, the source optical switching device 110 can connect the path between the input port 144 and the output port 141. When the detection optical signal from the detection unit 101 is received at the input port 144 via the first optical fiber 161, it can be transmitted to the target optical fiber 142 via the output port 141. Therefore, the transmission path of the detection optical signal is sequentially via the detection 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. For the process of sending detection optical signals to other optical fibers on the optical backplane 130, please refer to the process of sending detection optical signals to the target optical fiber 142, which will not be described in detail here.

[0052] This embodiment uses the example of the detection unit being located inside the monitoring board as an example for illustrative purposes.

[0053] The monitoring single board 150 shown in the embodiment is used for an integrated chip or an integrated circuit to realize the processing function related to the detection method provided in the embodiment, for example, the monitoring single board 150 can integrate one or more field-programmable gate arrays (FPGA), application specific integrated circuits (ASIC), system on chips (SoC), central processing units (CPU), network processors (NP), digital signal processors (DSP), micro controller units (MCU), programmable logic devices (PLD) or other integrated chips, or any combination of the above chips or processors, etc.

[0054] Mode 2

[0055] In the mode, the detection unit can be located on a single board different from the monitoring single board, or the detection unit is provided in the network device in the form of an independent module, as long as the detection unit is connected with the monitoring single board, so that the detection unit and the monitoring single board can exchange information, and the detection unit can send the detection light signal to any optical fiber included in the optical backboard.

[0056] Mode 3

[0057] In the mode, the detection unit can be provided in each source optical switching device, if it is needed to detect the conduction state of the target optical fiber, the detection unit in the source optical switching device connected with the target optical fiber can send the detection light signal to the target optical fiber, the process of sending the detection light signal shown in the mode can also be referred to the mode 1, and will not be described here. It can be seen that through the mode 3, whether the target optical fiber included in multiple target paths is in the conduction state can be detected synchronously, so that the detection efficiency of whether the target optical fiber is in the conduction state is improved.

[0058] Step 202, the network device receives a plurality of reflected light signals from the target path.

[0059] Specifically, as shown in step 201, the detection unit is used to send the detection light signal to the target path. During the transmission of the detection light signal along the target path, the optical fiber between the detection unit and the source optical switching device, the optical fiber in the source optical switching device, the target optical fiber on the optical backplane, and the optical fiber on the destination optical switching device will generate emitted light signals based on different refractive indices, and transmit the reflected light signals to the detection unit. It can be seen that the multiple reflected light signals received by the detection unit shown in this embodiment are signals formed by the target path reflecting the detection light signal.

[0060] Step 203: The network device acquires the reflection spectrum.

[0061] This embodiment uses the example of obtaining the reflection spectrum by the detection unit based on multiple reflected light signals reflected by the target path as an example for illustrative purposes, without limitation. For example, the detection unit may also send the obtained multiple reflected light signals to the monitoring board, and the monitoring board may obtain the reflection spectrum based on the multiple reflected light signals.

[0062] The following combination Figure 3 The reflection spectrum is illustrated below:

[0063] like Figure 3 As shown, the reflection spectrum is located in a two-dimensional coordinate system. The horizontal axis of this two-dimensional coordinate system is distance in meters (m), and the vertical axis is amplitude in decibels (dB). Specifically, the reflection spectrum includes the correspondence between the amplitude of any reflected light signal and the distance of the reflected light signal among multiple reflected light signals reflected by the target path. The distance of the reflected light signal is the distance between the position in the target path used to reflect the any reflected light signal and the detection unit.

[0064] by Figure 3 As shown in the example, the reflected light signal 301 in the reflection spectrum is the reflected light signal reflected by the input port of the source optical switching device when the probe light signal is transmitted to the target path. It can be seen that the horizontal axis of the reflected light signal 301 represents the distance between the input port of the source optical switching device and the probe unit, while the vertical axis of the reflected light signal 301 represents the amplitude of the reflected light signal 301.

[0065] Step 204: Network devices obtain the fiber connection relationship list.

[0066] 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 can execute step 204 in advance before executing steps 201 to 203 to obtain the fiber connection list. The fiber connection list includes the lengths of optical fibers connecting different source optical switching devices and different destination optical switching devices. For better understanding, the following description is based on Table 1, which is an example diagram of a fiber connection list shown in this embodiment.

[0067] Table 1

[0068]

[0069] Combination Figure 1 As shown in Table 1, the fiber connection list includes the fiber lengths between any source optical switch and destination optical switch. For example, L11 represents the length of the fiber connecting source optical switch 110 and destination optical switch 120, and this length is 500 mm. Similarly, LNM represents the length of the fiber connecting source optical switch 11N and destination optical switch 12M, and this length is 2546 mm. It is evident that in the fiber connection list shown in this embodiment, the lengths of any two different fibers are different.

[0070] Specifically, because the optical backplane is produced by a high-precision cabling machine, the length of the optical fiber on the optical backplane is highly accurate. Therefore, the length of the optical fiber stored in the fiber connection list is equal to or approximately equal to the actual length of the optical fiber on the optical backplane.

[0071] Step 205: The network device determines the length of the target optical fiber in the fiber connection list.

[0072] In this embodiment, in order to detect the continuity of the target optical fiber in the target path, the monitoring board can determine the length of the target optical fiber in the fiber connection list. For example, if the monitoring board determines that the target optical fiber to be tested is the optical fiber connected between the source optical switching device 11N and the destination optical switching device 12M, the monitoring board can determine the length of the target optical fiber LNM = 2546mm by querying the fiber connection list.

[0073] Step 206: The network device determines whether there is a target reflected light signal in the reflection spectrum. If not, proceed to step 207; if yes, proceed to step 208.

[0074] In this embodiment, once the monitoring board obtains the reflection spectrum and the length of the target optical fiber, it can determine whether the target optical fiber is in a conductive state by executing step 206.

[0075] Specifically, the monitoring single board determines whether there is a reflected light signal reflected by the target optical fiber in the reflection spectrum, if yes, it means that the target optical fiber can successfully transmit the probe light signal and has successfully reflected the target reflected light signal to the probe unit, which means that the target optical fiber is in an on state. If not, it means that the target optical fiber cannot successfully transmit the probe light signal and cannot successfully reflect the target reflected light signal to the probe unit, which means that the target optical fiber is in a fault state.

[0076] The following describes how the monitoring single board determines the target reflected light signal in the reflection spectrum:

[0077] In this embodiment, the monitoring single board can determine whether there are two reflected light signals satisfying the preset condition in the reflection spectrum, if yes, the monitoring single board determines that the two reflected light signals satisfying the preset condition are the target reflected light signal, if not, the monitoring single board determines that there is no target reflected light signal in the reflection spectrum.

[0078] 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.

[0079] Continue to combine Figure 3 The monitoring single board obtains the distance between any two adjacent reflected light signals in the reflection spectrum, for example, the monitoring single board obtains the reflected light signal 302 and the reflected light signal 303 adjacent in position in the reflection spectrum, and then obtains the distance 304 between the reflected light signal 302 and the reflected light signal 303. The distance 304 is the difference between the abscissa corresponding to the reflected light signal 302 and the abscissa corresponding to the reflected light signal 303. The monitoring single board determines whether the distance 304 is equal to the length of the target optical fiber, if yes, it means that there is a target reflected light signal (i.e. the reflected light signal 302 and the reflected light signal 303) in the reflection spectrum, if not, it means that there is no target reflected light signal in the reflection spectrum.

[0080] Optionally, continuing to take the reflected light signal 302 and the reflected light signal 303 as an example, when judging whether the reflected light signal 302 and the reflected light signal 303 satisfy the preset condition, the monitoring board can determine that 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, for example, in the case of distance 304 = 2486.5 mm, and the length L11 of the target optical fiber is 2486 mm, the monitoring board can also determine that the reflected light signal 302 and the reflected light signal 303 satisfy the preset condition, and then determine that the target optical fiber with the length LN2 is in the conducting state. The embodiment does not limit the degree of approximation, for example, in the case that the difference between the distance 304 and the length of the target optical fiber is less than or equal to 1 mm, it can be determined that the approximation is equal.

[0081] In step 207, the network device generates first prompt information.

[0082] In the 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 can be determined that the target optical fiber is in a fault state of non-conduction, and the monitoring board can generate first prompt information indicating the fault state of the target optical fiber. The embodiment does not limit the specific content of the first prompt information, as long as the first prompt information at least includes the identification of the target optical fiber, so that the maintenance personnel can accurately locate the target optical fiber in the optical backboard according to the first prompt information.

[0083] In step 208, the network device generates second prompt information.

[0084] When the monitoring board of the network device determines that there is a reflected light signal reflected by the target optical fiber in the reflection spectrum, it can be determined that the target optical fiber is in a conducting state, and the monitoring board can generate second prompt information indicating that the target optical fiber is in a conducting state. The embodiment does not limit the specific content of the second prompt information, as long as the second prompt information at least includes the identification of the target optical fiber, so that the maintenance personnel can accurately locate the target optical fiber in the conducting state in the optical backboard according to the second prompt information.

[0085] The beneficial effects of the detection method shown in the embodiment are described as follows:

[0086] By using the method shown in the embodiment, it is not necessary to calibrate the optical fiber connected between the source optical switching device and the sink optical switching device (such as the Rayleigh scattering curve of each optical fiber required by the existing scheme), and only the physical length of each optical fiber on the optical backboard needs to be obtained, which effectively reduces the operation complexity of the pretreatment of the optical fiber on the optical backboard and improves the detection efficiency.

[0087] The embodiment based on the reflection spectrum locates the target reflection light signal reflected by the target optical fiber. In the case where it is determined that the target reflection light signal exists in the reflection spectrum, it is determined that the target optical fiber is in the conducting state. It can be seen that, in the detection process of whether the target optical fiber is in the conducting state, the network device does not need to depend on the environment (such as temperature, vibration, etc.) in which the network device is located. That is, the change of the environment in which the network device is located does not affect the accuracy of the detection of whether the target optical fiber is in the conducting state, thereby effectively improving the accuracy of the detection of the target optical fiber and effectively improving the robustness of the detection.

[0088] The method shown in the embodiment can accurately locate the target optical fiber that fails, thereby facilitating the maintenance personnel to effectively maintain the target optical fiber in the non-conducting state, enhancing the maintainability of the network device, improving the maintenance efficiency, and improving the accuracy and efficiency of the maintenance personnel in locating the target optical fiber that fails.

[0089] The following describes another embodiment of the detection method provided in the application in combination with Figure 4 The following describes another embodiment of the detection method provided in the application in combination with Figure 4 The following describes another embodiment of the detection method provided in the application in combination with

[0090] Step 401: The network device sends a probe light signal to a target path.

[0091] Step 402: The network device receives a plurality of reflection light signals from the target path.

[0092] Step 403: The network device acquires a reflection spectrum.

[0093] Step 404: The network device acquires a fiber connection relationship list.

[0094] The execution process of steps 401 to 404 shown in the embodiment is described in detail in the description of steps 201 to 204 shown in Figure 2 The execution process of steps 401 to 404 shown in the embodiment is described in detail in the description of steps 201 to 204 shown in

[0095] Step 405: The network device determines whether the target reflection light signal exists in the reflection spectrum. If not, step 406 is performed; if yes, step 407 is performed.

[0096] In the embodiment, in the case where the monitoring single board acquires the reflection spectrum and the fiber connection relationship list, it can be determined whether the target optical fiber is in the conducting state by performing step 405.

[0097] The following describes the process in which the monitoring single board determines the target reflection light signal in the reflection spectrum:

[0098] In the embodiment, the monitoring single board can determine whether two reflection light signals satisfying the preset condition exist in the reflection spectrum. If yes, the monitoring single board determines that the two reflection light signals satisfying the preset condition are the target reflection light signals. If no, the monitoring single board determines that the target reflection light signals do not exist in the reflection spectrum.

[0099] The preset condition is that the positions of the two reflection light signals in the reflection spectrum are adjacent, and the distance between the two reflection light signals corresponds to the length of one optical fiber included in the continuous fiber relationship list.

[0100] The embodiment is described in combination with Figure 3 The monitoring single board obtains the distance between any two adjacent reflection light signals in the reflection spectrum. For example, the monitoring single board obtains the reflection light signal 302 and the reflection light signal 303 adjacent in the reflection spectrum. Then, the monitoring single board obtains the distance 304 between the reflection light signal 302 and the reflection light signal 303. The distance 304 is the difference between the abscissa corresponding to the reflection light signal 302 and the abscissa corresponding to the reflection light signal 303. The monitoring single board determines whether the distance 304 has been stored in the continuous fiber relationship list. If yes, it indicates that the target reflection light signals (i.e., the reflection light signal 302 and the reflection light signal 303) exist in the reflection spectrum. If no, it indicates that the target reflection light signals do not exist in the reflection spectrum.

[0101] Alternatively, the monitoring single board determines whether the reflection light signal 302 and the reflection light signal 303 satisfy the preset condition as long as a length equal to or approximately equal to the distance 304 is determined in the continuous fiber relationship list. The approximately equal is described in detail in the embodiment. Figure 2 The embodiment is described in combination with

[0102] In step 406, the network device generates first prompt information.

[0103] In step 407, the network device generates second prompt information.

[0104] The specific execution process of steps 406 to 407 in the embodiment is described in detail in the embodiment. Figure 2 The specific execution process of steps 207 to 208 in the embodiment is described in detail in the embodiment.

[0105] The detection method in the embodiment can be used to directly determine whether the target optical fiber is in the conducting state according to the continuous fiber relationship list and the reflection spectrum, without separately obtaining the length of the target optical fiber in advance, thereby further improving the detection efficiency.

[0106] The embodiment is described in combination with Figure 1As shown, when the network equipment includes multiple source optical switches and multiple destination optical switches, there will be many optical fibers on the optical backplane 130. The detection method described in this application can be sequentially executed on each of the multiple optical fibers included in the optical backplane to detect whether they are in a conducting state. Alternatively, the detection method described in this application can be randomly executed on each of the multiple optical fibers included in the optical backplane. The specific method is not limited in this application; the following description, in conjunction with... Figure 5 As shown, an exemplary illustration is provided on how to trigger the detection of a specific optical fiber on the optical backplane, wherein, Figure 5 This is a flowchart illustrating the steps of a third embodiment of the detection method provided in this application.

[0107] Step 501: The network device sends a probe light signal to the target path.

[0108] Step 502: The network device receives multiple reflected light signals from the target path.

[0109] Step 503: The network device acquires the reflection spectrum.

[0110] For details of the processes shown in steps 501 to 503 of this embodiment, please refer to [link / reference]. Figure 2 The specific execution process is not described in detail in steps 201 to 203 shown.

[0111] Step 504: The network device determines the maximum distance in the reflection spectrum.

[0112] The maximum distance shown in this embodiment is the maximum distance among the multiple reflected light signals and the detection unit. See also... Figure 3 As shown, among the multiple reflected light signals included in the reflection spectrum, the reflected light signal with the largest distance from the detection unit is the reflected light signal with the largest abscissa (i.e., as shown in the figure). Figure 3 The reflected light signal 304 is shown.

[0113] As can be seen, the maximum distance can be determined by the monitoring board of the network device based on the acquired reflection spectrum.

[0114] Step 505: The network device determines whether the maximum distance is less than the length of the target path. If not, proceed to step 506; if yes, return to step 501.

[0115] Specifically, the monitoring board shown in this embodiment can pre-obtain the length of each path within the network device. Here, different paths refer to transmission paths that include different source optical switching devices and different destination optical switching devices connected by optical fibers. See also... Figure 1As shown, taking the target path including the detection unit 101, the source optical switching device 110, the target optical fiber 142, and the destination optical switching device 120 as an example, the length of the target path includes the length of the first optical fiber 161 connecting the detection unit 101 and the source optical switching device 110, the length of the optical fiber in the source optical switching device 110 used to transmit the optical signal from the first optical fiber 161 to the output port 141, the length of the target optical fiber 142, and the length of the optical fiber in the destination optical switching device 143 used to transmit the optical signal.

[0116] If the network device determines that the maximum distance is less than the length of the target path, it means that the probe optical signal has been transmitted to the end position of the target path. For example, if the probe optical signal is not transmitted to the output port of the optical switching device 143, it means that there is a fault point in the target path, such as a broken fiber, which prevents the probe optical signal from being transmitted to the end position of the target path. Then, the target path is detected by executing step 507.

[0117] If the network device determines that the maximum distance is equal to the length of the target path, it means that the probe light signal can be transmitted to the end of the target path, and that the transmission of the probe light signal by the target path is normal. Then, it returns to step 501 to select a new target path in the network device for detection.

[0118] Step 506: Network devices obtain the fiber connection relationship list.

[0119] Step 507: The network device determines the length of the target optical fiber in the fiber connection list.

[0120] Step 508: The network device determines whether there is a target reflected light signal in the reflection spectrum. If not, proceed to step 509; if yes, proceed to step 510.

[0121] Step 509: The network device generates the first prompt message.

[0122] Step 510: The network device generates a second prompt message.

[0123] For a detailed description of the execution process of steps 506 to 510 shown in this embodiment, please refer to [link to documentation]. Figure 2 Steps 204 to 208 are shown in the figure, and will not be described in detail in this embodiment.

[0124] As can be seen, using the method shown in this embodiment, when the network device obtains the reflection spectrum of the target path, it does not directly detect whether the target optical fiber included in the target path is in a conductive state. Instead, it detects whether the maximum distance in the reflection spectrum is less than the length of the target path. Only when the maximum distance in the reflection spectrum is less than the length of the target path does it indicate that there is a fault point in the target path. The network device can then detect the target path with the identified fault point, thereby avoiding repeated detection of target paths without fault points. This allows the network device to detect only target paths with existing fault points, effectively improving detection efficiency.

[0125] The following combination Figure 6 The structure of the network device provided in this application is illustrated in the figure. Figure 6 This is a structural example diagram of a second embodiment of the network device provided in this application;

[0126] like Figure 6 As shown, the network device 600 includes a detection unit 621 and a processor 622 connected to the detection unit 621. For a detailed description of the detection unit, please refer to the above method embodiment, which will not be repeated here.

[0127] Optionally, the detection unit 621 and the processor 622 can be integrated on the same monitoring board. Alternatively, the detection unit 621 can be connected to the monitoring board integrated with the processor 622. For a detailed description of the monitoring board, please refer to the above method embodiments, which will not be repeated here.

[0128] The network device further includes at least one target path 610, which includes a source optical switching device 611, a destination optical switching device 612, and a target optical fiber 613 connected between the source optical switching device 611 and the destination optical switching device 612. In this embodiment, the number of target paths 610 is not limited. For example, the network device includes one or more target paths 610. For a detailed description of the target paths, please refer to the above method embodiment, which will not be elaborated further.

[0129] In order to enable the detection unit 621 to send a detection optical signal to the target path 610, the detection unit and the source optical switching device 611 are connected through an optical fiber 623, and the detection unit 621 can send a detection optical signal to the source optical switching device 611 through the optical fiber 623.

[0130] The following combination Figure 7 The diagram illustrates another structure of the network device provided in this application, wherein... Figure 7 Example diagram of the third embodiment of the network device provided in this application:

[0131] like Figure 7 As shown, the network device 700 includes a processor 701. In this embodiment, the processor 701 is integrated on a monitoring board. For a detailed description of the monitoring board, please refer to the above method embodiment. Detailed explanations will not be repeated here.

[0132] The network device shown in this embodiment also includes a target path 710, which includes a source optical switching device 711, a destination optical switching device 712, and a target optical fiber 713 connected between the source optical switching device 711 and the destination optical switching device 712. This embodiment does not limit the number of target paths 710. For example, the network device includes one or more target paths 710. For a detailed description of the target paths, please refer to the above method embodiment, which will not be elaborated further.

[0133] Specifically, the source optical switching device 711 shown in this embodiment integrates a detection unit 714, and the detection unit 714 is connected to the processor 701. For a detailed description of the detection unit 714, please refer to the above method embodiment, which will not be repeated here.

[0134] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of detection, characterized in that, The method comprises: The detection unit sends a detection light signal to a target path, the target path comprising a source optical switching device, a sink optical switching device, and a target optical fiber connected between the source optical switching device and the sink optical switching device; Receiving a plurality of reflected light signals from the target path, the plurality of reflected light signals being reflections of the detection light signal by the target path to form a reflection spectrum; Obtaining a reflection spectrum, the reflection spectrum comprising a correspondence between the amplitude and distance of any reflected light signal in the plurality of reflected light signals, the distance of the reflected light signal being the distance between the position in the target path for reflecting the any reflected light signal and the detection unit; Determining a distance maximum value in the reflection spectrum, the distance maximum value being the maximum value among the distances between the detection unit and the plurality of reflected light signals; If it is determined that the distance maximum value is less than the length of the target path, it is determined that there is a target reflected light signal in the plurality of reflected light signals, and the target optical fiber is in a conducting state, the target reflected light signal being a reflected light signal reflected by the target optical fiber, and the target reflected light signal corresponding to the length of the target optical fiber.

2. The method of claim 1, wherein, The determination of the target reflected light signal in the plurality of reflected light signals further comprises: Obtaining the length of the target optical fiber; If it is determined in the reflection spectrum that there are two reflected light signals satisfying a preset condition, it is determined that there is the target reflected light signal, 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.

3. The method of claim 1, wherein, The determination of the target reflected light signal in the plurality of reflected light signals further comprises: Obtaining a fiber connection relationship list, the fiber connection relationship list comprising the lengths of optical fibers connected between different source optical switching devices and different sink optical switching devices, and the lengths of any two optical fibers included in the fiber connection relationship list being different; If it is determined in the reflection spectrum that there are two reflected light signals satisfying a preset condition, it is determined that there is the target reflected light signal, 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 an optical fiber included in the fiber connection relationship list.

4. The method according to any one of claims 1 to 3, characterized in that, The target optical fiber is located on an optical backplane, and the lengths of different optical fibers on the optical backplane are different.

5. The method according to any one of claims 1 to 3, characterized in that, The detection unit is an optical frequency domain reflectometer (OFDR) or an optical time domain reflectometer (OTDR).

6. A network device, comprising: The network device comprises at least one target path, the target path comprising a source optical switching device and a sink optical switching device, and a target optical fiber connected between the source optical switching device and the sink optical switching device; the network device further comprises a detection unit and a processor connected to the detection unit; The detection unit is configured to send a detection light signal to the target path; The detection unit is further configured to receive a plurality of reflected light signals from the target path, the plurality of reflected light signals being reflections of the detection light signal by the target path to form a reflection spectrum; The processor is configured to: acquire a reflection spectrum, the reflection spectrum comprising a correspondence between a distance and an amplitude of any of the plurality of reflected light signals, the distance being a distance between a position in the target path for reflecting the any of the reflected light signals and the detection unit; determine a distance maximum in the reflection spectrum, the distance maximum being a maximum of the distances between the detection unit in the plurality of reflected light signals; if it is determined that the distance maximum is less than the length of the target path, determine that there is a target reflected light signal in the plurality of reflected light signals, and determine that the target optical fiber is in an on state, the target reflected light signal being a reflected light signal reflected by the target optical fiber, and the target reflected light signal corresponding to the length of the target optical fiber.

7. The network device of claim 6, wherein, The detection unit and the processor are integrated on the same single board, and the detection unit is connected to each of the source optical switching devices included in the network device, or the detection unit is integrated on the source optical switching device.

8. The network device of claim 6, wherein, The processor is specifically configured to: acquire the length of the target optical fiber; if it is determined that there are two of the reflected light signals satisfying a preset condition in the reflection spectrum, determine that there is the target reflected light signal, wherein the preset condition is that positions of the two reflected light signals in the reflection spectrum are adjacent, and a distance between the two reflected light signals corresponds to the length of the target optical fiber.

9. The network device of claim 6, wherein, The processor is specifically configured to: acquire a fiber connection relationship list, the fiber connection relationship list comprising lengths of optical fibers connected between different source optical switching devices and different sink optical switching devices, and any two optical fibers included in the fiber connection relationship list having different lengths; if it is determined that there are two of the reflected light signals satisfying a preset condition in the reflection spectrum, determine that there is the target reflected light signal, wherein the preset condition is that positions of the two reflected light signals in the reflection spectrum are adjacent, and a distance between the two reflected light signals corresponds to a length of an optical fiber included in the fiber connection relationship list.

10. The network device of any of claims 6 to 9, wherein, The network device further comprises an optical backboard, and the target optical fiber is located on the optical backboard, and lengths of different optical fibers on the optical backboard are different.

11. The network device of any of claims 6 to 9, wherein, The detection unit is an optical frequency domain reflectometer (OFDR) or an optical time domain reflectometer (OTDR).

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