Optical fiber link fault diagnosis method and device, computer equipment and storage medium

Abstract

The invention relates to an optical fiber link fault diagnosis method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: carrying out optical fiber vibration detection on a branch optical fiber corresponding to FTTR main equipment; under the condition that the vibration event corresponding to the branch optical fiber is detected to be the vibration event of the preset type, obtaining an optical fiber link performance parameter between the optical line terminal and the FTTR main equipment; under the condition that the optical fiber link performance parameters are abnormal, sending an optical fiber link fault diagnosis instruction to the optical line terminal; and the optical line terminal is used for sending the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis equipment, so that the optical fiber link fault diagnosis equipment performs fault diagnosis on all branch optical fibers of the optical line terminal to obtain a fault diagnosis result, and the fault diagnosis result is used as a fault diagnosis result of the branch optical fibers corresponding to the FTTR main equipment. By adopting the method, the fault diagnosis accuracy of the optical fiber link can be improved.

Description

Technical Field

[0001] The present application relates to the field of network security technology, and in particular to a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for diagnosing optical fiber link faults. Background Art

[0002] In a passive optical network, in order to ensure normal communication of the optical fiber link, it is necessary to perform fault diagnosis on the optical fiber link.

[0003] Traditionally, fiber optic link fault diagnosis involves emitting optical pulses into the trunk fiber of a passive optical network (PON) and receiving reflected signals, which are then used for fault diagnosis. However, the presence of 1:N or 2:N optical splitters in PONs results in the reflection information from N branch fibers simultaneously converging onto the trunk fiber when the reflected signal returns. This causes the N branch fibers to overlap on the fault detection curve, making it impossible to determine which branch fiber is faulty. This results in low accuracy in fiber optic link fault diagnosis. Summary of the Invention

[0004] Based on this, it is necessary to provide a fiber optic link fault diagnosis method, device, computer equipment, computer readable storage medium and computer program product that can improve the accuracy of fiber optic link fault diagnosis in order to solve the above technical problems.

[0005] In a first aspect, the present application provides a method for diagnosing optical fiber link faults, which is applied to an FTTR main device, comprising:

[0006] Performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device;

[0007] When it is detected that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, obtaining the optical fiber link performance parameters between the optical line terminal and the FTTR main device;

[0008] In the event that an abnormality occurs in the optical fiber link performance parameters, an optical fiber link fault diagnosis instruction is sent to the optical line terminal; the optical line terminal is used to send the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis device, so that the optical fiber link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal, obtains a fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0009] In one embodiment, when it is detected that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, before obtaining the optical fiber link performance parameter between the optical line terminal and the FTTR main device, the method further includes:

[0010] acquire vibration data of a vibration event corresponding to the branch optical fiber;

[0011] input the vibration data into a pre-trained vibration event identification model to obtain an event type of the vibration event corresponding to the branch optical fiber;

[0012] in a case where the event type is the preset type, determine that the vibration event corresponding to the branch optical fiber is the vibration event of the preset type;

[0013] in a case where the event type is not the preset type, determine that the vibration event corresponding to the branch optical fiber is not the vibration event of the preset type, and jump to the step of detecting the branch optical fiber corresponding to the FTTR master device for fiber vibration.

[0014] In one of the embodiments, the acquiring of the fiber link performance parameter between the optical line terminal and the FTTR master device comprises:

[0015] acquiring first transceiving optical power information of an optical module of the optical line terminal, and acquiring second transceiving optical power information of an optical module of the FTTR master device;

[0016] determining a fiber link loss parameter between the optical line terminal and the FTTR master device based on the first transceiving optical power information and the second transceiving optical power information;

[0017] taking the fiber link loss parameter as the fiber link performance parameter between the optical line terminal and the FTTR master device.

[0018] In one of the embodiments, in a case where the fiber link performance parameter is abnormal, before sending a fiber link fault diagnosis instruction to the optical line terminal, the method further comprises:

[0019] acquiring a difference between the fiber link performance parameter and a preset link performance parameter;

[0020] in a case where the difference is greater than a preset threshold, determining that the fiber link performance parameter is abnormal;

[0021] in a case where the difference is less than or equal to the preset threshold, determining that the fiber link performance parameter is not abnormal, and jumping to the step of detecting the branch optical fiber corresponding to the FTTR master device for fiber vibration.

[0022] In one of the embodiments, the FTTR master device comprises a fiber sensing module, a wavelength division multiplexing module, a computing power module and a passive optical network communication module.

[0023] The computing power module is connected to the passive optical network communication module and the optical fiber sensing module respectively; the wavelength division multiplexing module is connected to the passive optical network communication module and the optical fiber sensing module respectively.

[0024] In a second aspect, the present application also provides another optical fiber link fault diagnosis method, which is applied to an optical fiber link fault diagnosis device, comprising:

[0025] receiving an optical fiber link fault diagnosis instruction sent by an optical line terminal; the FTTR master device is used to perform optical fiber vibration detection on a branch optical fiber corresponding to the FTTR master device, and when detecting that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, obtain optical fiber link performance parameters between the optical line terminal and the FTTR master device; and when the optical fiber link performance parameters are abnormal, send the optical fiber link fault diagnosis instruction to the optical line terminal;

[0026] Performing fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction to obtain a fault diagnosis result;

[0027] The fault diagnosis result is used as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0028] In one embodiment, the performing fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction to obtain a fault diagnosis result includes:

[0029] Performing fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction to obtain a fault diagnosis curve;

[0030] Comparing the fault diagnosis curve with a preset health curve to obtain a comparison result;

[0031] Based on the comparison result, determining a newly added fault event;

[0032] A fault diagnosis result is determined based on the newly added fault event.

[0033] In a third aspect, the present application further provides a fiber optic link fault diagnosis device, which is applied to an FTTR main device, comprising:

[0034] A vibration detection module, configured to perform optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device;

[0035] a parameter acquisition module, configured to acquire performance parameters of the optical fiber link between the optical line terminal and the FTTR main device when detecting that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type;

[0036] An instruction sending module is used to send an optical fiber link fault diagnosis instruction to an optical line terminal when an abnormality occurs in the optical fiber link performance parameters; the optical line terminal is used to send the optical fiber link fault diagnosis instruction to an optical fiber link fault diagnosis device, so that the optical fiber link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal, obtains a fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0037] In a fourth aspect, the present application further provides another optical fiber link fault diagnosis device, comprising:

[0038] an instruction receiving module for receiving an optical fiber link fault diagnosis instruction sent by an optical line terminal; the FTTR master device is used to perform optical fiber vibration detection on a branch optical fiber corresponding to the FTTR master device, and when detecting that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, obtain optical fiber link performance parameters between the optical line terminal and the FTTR master device; and when the optical fiber link performance parameters are abnormal, send the optical fiber link fault diagnosis instruction to the optical line terminal;

[0039] a fault diagnosis module, configured to perform fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction and obtain a fault diagnosis result;

[0040] The result determination module is configured to use the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0041] In a fifth aspect, the present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0042] Performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device;

[0043] When it is detected that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, obtaining the optical fiber link performance parameters between the optical line terminal and the FTTR main device;

[0044] In the event that an abnormality occurs in the optical fiber link performance parameters, an optical fiber link fault diagnosis instruction is sent to the optical line terminal; the optical line terminal is used to send the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis device, so that the optical fiber link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal, obtains a fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0045] In a sixth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0046] Performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device;

[0047] When it is detected that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, obtaining the optical fiber link performance parameters between the optical line terminal and the FTTR main device;

[0048] In the event that an abnormality occurs in the optical fiber link performance parameters, an optical fiber link fault diagnosis instruction is sent to the optical line terminal; the optical line terminal is used to send the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis device, so that the optical fiber link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal, obtains a fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0049] In a seventh aspect, the present application further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the following steps:

[0050] Performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device;

[0051] When it is detected that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, obtaining the optical fiber link performance parameters between the optical line terminal and the FTTR main device;

[0052] In the event that an abnormality occurs in the optical fiber link performance parameters, an optical fiber link fault diagnosis instruction is sent to the optical line terminal; the optical line terminal is used to send the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis device, so that the optical fiber link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal, obtains a fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0053] The above-mentioned optical fiber link fault diagnosis method, device, computer equipment, computer-readable storage medium and computer program product perform optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main equipment through the FTTR main equipment; then, when it is detected that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, the optical fiber link performance parameters between the optical line terminal and the FTTR main equipment are obtained; finally, when the optical fiber link performance parameters are abnormal, an optical fiber link fault diagnosis instruction is sent to the optical line terminal; the optical line terminal is used to send the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis equipment, so that the optical fiber link fault diagnosis equipment performs fault diagnosis on all branch optical fibers of the optical line terminal, obtains a fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main equipment. ; In this way, when performing optical fiber link fault diagnosis, the optical fiber vibration detection and optical fiber link performance parameter detection are first used to locate the branch optical fiber where a preset type of vibration event occurs and the optical fiber link performance parameters are abnormal; then the optical fiber link fault diagnosis equipment is triggered to perform fault diagnosis on all branch optical fibers of the optical line terminal to obtain a fault diagnosis result; because the fault diagnosis result is caused by the branch optical fiber where a preset type of vibration event occurs and the optical fiber link performance parameters are abnormal, the fault diagnosis result is confirmed as the fault diagnosis result of the branch optical fiber where a preset type of vibration event occurs and the optical fiber link performance parameters are abnormal, thereby achieving the purpose of distinguishing and locating branch optical fiber faults, which is conducive to accurately locating the faulty branch optical fiber and its corresponding fault diagnosis result, thereby improving the accuracy of optical fiber link fault diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0055] Figure 1 A diagram illustrating an application environment of a method for diagnosing optical fiber link faults in one embodiment;

[0056] Figure 2 1 is a flow chart of a method for diagnosing optical fiber link faults in one embodiment;

[0057] Figure 3 is a flow chart of a method for diagnosing optical fiber link faults in another embodiment;

[0058] Figure 4 1 is a flow chart of a method for diagnosing optical fiber link faults in another embodiment;

[0059] Figure 5 Schematic diagram of a fiber optic sensing vibration detection FTTR network in one embodiment;

[0060] Figure 6 This is a structural block diagram of an FTTR main device in one embodiment;

[0061] Figure 7 1 is a flow chart of a method for diagnosing optical fiber link faults in an FTTR network according to an embodiment;

[0062] Figure 8 is a structural block diagram of an optical fiber link fault diagnosis device in one embodiment;

[0063] Figure 9 is a structural block diagram of an optical fiber link fault diagnosis device in another embodiment;

[0064] Figure 10 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0066] In the daily maintenance of PON ODN network, OTDR detection is a technical means for optical fiber cable performance monitoring and fault diagnosis. Figure 5 For example, in an ODN network with an optical splitter (shown as a 1:8 optical splitter), the N-core distribution fibers / introduction fibers overlap on the OTDR test curve, making it impossible to determine which branch fiber has performance degradation or failure. For example, due to the presence of an optical splitter in an ODN network, when the OTDR transmits a test signal from the trunk fiber end to the network, the signal is distributed by the splitter to the N branch fibers. When the reflected signal returns, the reflection information from the N branch fibers simultaneously converges on the trunk fiber, ultimately overlapping on the OTDR test curve. Because the reflection signals from all the branch fibers are "crowded" on the same test curve and cannot be distinguished from each other, when a branch fiber experiences performance degradation (such as increased loss) or a failure (such as a breakpoint), the OTDR can only detect that "a branch has a problem" but cannot determine which of the N branches has the problem.

[0067] Based on this, in order to solve the technical problem that multiple branch optical fibers overlap on the physical curve (i.e., the OTDR detection curve) during the OTDR detection process, resulting in the inability to distinguish and locate branch optical fiber faults, the present application provides a fiber optic link fault diagnosis method, specifically a FTTR networking fiber optic link fault diagnosis method, which can accurately locate the faulty branch optical fiber and its corresponding fault diagnosis results, thereby improving the accuracy of fiber optic link fault diagnosis. In addition, it should be noted that the present application relates to the field of network and security technology, specifically to the implementation of PON basic functions, optical fiber sensing, and OTDR technology-based linkage monitoring based on a passive optical network (PON) system to complete PON ODN branch optical fiber fault detection and diagnosis.

[0068] The optical fiber link fault diagnosis method provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown in FIG. , the optical fiber link fault diagnosis device 101 is connected to the optical line terminal 102, and the optical line terminal 102 is connected to multiple FTTR main devices 103 via optical fibers. For example, referring to FIG. Figure 1 Each FTTR master device 103 performs optical fiber vibration detection on the branch optical fiber corresponding to the FTTR master device 103. When the vibration event corresponding to the branch optical fiber is detected to be a preset type of vibration event, the optical fiber link performance parameters between the optical line terminal 102 and the FTTR master device 103 are obtained. When the optical fiber link performance parameters are abnormal, an optical fiber link fault diagnosis instruction is sent to the optical line terminal 102. The optical line terminal 102 sends the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis device 103. The optical fiber link fault diagnosis device 103 performs fault diagnosis on all branch optical fibers of the optical line terminal 102 according to the received optical fiber link fault diagnosis instruction, obtains a fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR master device 103.

[0069] Among them, the fiber optic link fault diagnosis equipment 101 refers to a device used to diagnose faults in fiber optic links, specifically OTDR equipment, OTDR test boards, etc. The optical line terminal 102 is a core local-end device in a fiber optic access network (especially PON), and is mainly deployed in the operator's computer room or optical junction box and other locations. It is responsible for connecting the upper backbone network with the optical network unit (ONU / ONT) on the lower user side, and is the "hub node" in the fiber optic communication link. The FTTR main device 103 refers to the core control device located on the home or enterprise user side in the FTTR (fiber to the room) network architecture, specifically refers to a device with functions such as optical signal reception and conversion, network management, and signal distribution. One end is connected to the operator's optical line terminal (OLT) through optical fiber, and the other end is connected to the slave devices in each room (such as optical AP) through indoor optical fiber to achieve fiber optic coverage throughout the house.

[0070] Before introducing the specific embodiments of the present application, the professional terms involved in the present application are explained:

[0071] PON (Passive Optical Network): A passive optical network is a fiber-optic access network consisting of an optical line terminal (OLT), an optical distribution network (ODN), and an optical network unit (ONU). The "passive" part means that the ODN does not contain any active electronic devices.

[0072] OLT (Optical Line Terminal): An optical line terminal is a core device in a fiber-optic access network (especially a PON network, or passive optical network). It is usually deployed in the operator's computer room (central office). Its main function is to terminate optical signals and enable communication with user-end devices.

[0073] Optical Distribution Network (ODN): The optical distribution network (ODN) is the intermediate transmission link connecting the OLT and ONU in a PON system and is a key component of the physical layer. It primarily consists of trunk optical fibers (connecting the OLT to the optical splitter), optical splitters (core components that split optical signals from one path into multiple paths, or from multiple paths into one, forming a 1:N or 2:N branching structure), distribution / introduction optical fibers (connecting the optical splitter to each ONU), and passive components such as optical connectors and optical connectors.

[0074] ONU (Optical Network Unit): An optical network unit (ONU) is a terminal device deployed at the user end (such as a home or enterprise) in a fiber-optic access network (especially a PON network). It works with the OLT (Optical Line Terminal) at the central office to convert optical signals into electrical signals and provide network access services to users.

[0075] OTDR (Optical Time Domain Reflectometer): An instrument used to detect fiber optic link faults. By emitting light pulses into the optical fiber and analyzing the reflected light signals (such as Rayleigh scattering and Fresnel reflection), it can determine the location and magnitude of fiber breakpoints and loss points. For example, it can generate an OTDR detection curve to determine whether the optical fiber has faults such as excessive loss or breakpoints, and locate the fault location.

[0076] OTDR test board: A modular component integrated into communication equipment (such as OLT and optical line terminal). Its main function is to implement the test function of optical time domain reflectometer (OTDR) for automated, real-time fault detection and performance monitoring of optical fiber links.

[0077] Fiber optic sensing: PON fiber optic sensing is a new sensing technology that uses light waves as carriers and optical fiber as a medium to "sense" and "transmit" external measurement signals. Fiber optic sensing has the characteristics of real-time, multi-point alarm, precise positioning, and easy deployment.

[0078] FTTR (Fiber to the Room): Fiber to the room, based on the original fiber to the home (FTTH, Fiber To The Home) further extends the fiber to the room of residents / businesses, completing the last 100 meters of broadband access.

[0079] FTTR main equipment: An "enhanced ONU" that not only has the optical signal reception and conversion functions of an ONU, but also adds additional FTTR-specific functions such as branch fiber management, whole-house network coverage, and fault diagnosis.

[0080] In an exemplary embodiment, Figure 2 As shown, a method for diagnosing optical fiber link faults is provided. Figure 1 The FTTR main device in FIG. 1 is taken as an example to illustrate the method, which includes the following steps S201 to S202. In which:

[0081] Step S201: performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device.

[0082] Among them, reference Figure 5 Each FTTR main device corresponds to a branch optical fiber, such as an incoming optical fiber; the branch optical fibers corresponding to each FTTR main device include an upstream branch optical fiber and a downstream branch optical fiber; the upstream branch optical fiber refers to the optical fiber in the direction of the FTTR main device connecting to the OLT device, and the downstream branch optical fiber refers to the optical fiber in the direction of the FTTR main device connecting to the ONU slave device (i.e., the FTTR slave device).

[0083] Fiber optic vibration detection refers to the technology that uses the optical transmission characteristics of optical fibers to sense, collect, and analyze vibration signals in the environment surrounding a fiber optic link. Specifically, it refers to the technology that identifies the position, intensity, and frequency of external vibrations (such as mechanical vibration, acoustic vibration, and impact vibration) by monitoring changes in parameters such as the phase, intensity, and polarization state of the optical signal in the optical fiber. The core principle of fiber optic vibration detection is the fiber optic sensing effect: when an optical fiber is subjected to external vibrations, the optical fiber's physical properties such as length and refractive index will undergo slight changes, causing the laser light (such as pulsed light or continuous light) transmitted in the optical fiber to produce corresponding modulation (such as phase modulation and changes in the intensity of Rayleigh scattered light). By capturing these changes in optical signals through dedicated detection equipment (such as distributed fiber optic vibration sensors) and combining them with algorithm analysis, specific information about the vibration can be inferred. In actual scenarios, fiber optic vibration detection refers to the qualitative measurement of fiber optic sensing vibrations.

[0084] Each FTTR main device can actively perform optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device according to a preset strategy or a preset period.

[0085] Exemplarily, the FTTR main device performs optical fiber vibration detection on the branch optical fiber corresponding to the main device according to a preset strategy (such as a timing detection strategy) or a preset period (such as once per minute) to determine whether a vibration event occurs in the branch optical fiber.

[0086] For example, refer to Figure 6 The sensing module in the FTTR main device actively initiates qualitative measurement of optical fiber sensing vibration of the branch optical fiber (including the branch optical fiber of the OLT and the branch optical fiber of the ONU slave device), such as vibration detection 1 (i.e. vibration detection of the branch optical fiber of the OLT) and vibration detection 2 (i.e. vibration detection of the branch optical fiber of the ONU slave device), to determine whether a vibration event occurs in the branch optical fiber.

[0087] Step S202: When it is detected that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, the optical fiber link performance parameters between the optical line terminal and the FTTR main device are obtained.

[0088] Among them, the vibration event corresponding to the branch optical fiber refers to an event that causes the branch optical fiber to vibrate, specifically an event that can cause the branch optical fiber to physically vibrate, thereby causing the optical signal characteristics (such as phase, intensity, polarization state, etc.) transmitted in the branch optical fiber to change. For example, people digging near the optical fiber, construction machinery operating, vehicles running over the optical fiber laying area, climbing over the optical fiber perimeter fence, etc., can cause the optical fiber to vibrate.

[0089] The preset vibration event types are typical vibration events that cause fiber link performance degradation (e.g., fiber link loss), such as pulling, squeezing, and gnawing. Pulling refers to manual pulling of the fiber entering a home; squeezing refers to construction excavation squeezing the fiber; and gnawing refers to animals gnawing on outdoor / overhead fibers.

[0090] The fiber link performance parameters are parameters used to describe the link performance of the fiber link, such as the fiber link loss parameter. The fiber link performance parameters are used to reflect whether the fiber link performance is degraded.

[0091] Exemplarily, if the FTTR main device detects a vibration event in the branch optical fiber, it obtains the event type of the vibration event corresponding to the branch optical fiber, and compares the event type of the vibration event corresponding to the branch optical fiber with the preset type to determine whether the vibration event corresponding to the branch optical fiber is a vibration event of the preset type. If so, the optical fiber link performance parameters between the optical line terminal and the FTTR main device are obtained.

[0092] For example, refer to Figure 6 If the sensing module in the FTTR main device detects a vibration event in the branch optical fiber, the vibration event corresponding to the branch optical fiber will be reported to the computing power module in the FTTR main device; the computing power module identifies the event type of the vibration event corresponding to the branch optical fiber, and determines whether the event type of the vibration event corresponding to the branch optical fiber is a preset type, and then determines whether the vibration event corresponding to the branch optical fiber is a preset type of vibration event; if so, the optical fiber link loss parameter between the optical line terminal and the FTTR main device is calculated to determine whether the optical fiber link performance of the branch optical fiber is degraded.

[0093] Step S203: When an abnormality occurs in the optical fiber link performance parameters, an optical fiber link fault diagnosis instruction is sent to the optical line terminal; the optical line terminal is used to send the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis device, so that the optical fiber link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal, obtains a fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0094] The abnormality of the optical fiber link performance parameter refers to the abnormality of the optical fiber link loss parameter, which is used to indicate that the optical fiber link performance is degraded.

[0095] The determination of whether the optical fiber link performance parameters are abnormal is mainly to determine whether the vibration event corresponding to the branch optical fiber causes the optical fiber link performance to deteriorate.

[0096] In the case where an abnormality occurs in the optical fiber link performance parameter, the branch optical fiber may be identified as a branch optical fiber in which a preset type of vibration event occurs and the optical fiber link performance parameter is abnormal.

[0097] The optical fiber link fault diagnosis instruction refers to an instruction for executing an optical fiber link fault diagnosis, such as an OTDR detection instruction.

[0098] Among them, all branch optical fibers of the optical line terminal include the branch optical fibers corresponding to each FTTR main device in the FTTR network. For details, refer to Figure 5 .

[0099] The fault diagnosis result refers to the diagnosis result obtained after fault diagnosis of all branch optical fibers of the optical line terminal, such as an OTDR diagnosis result.

[0100] Among them, fault diagnosis of all branch optical fibers of the optical line terminal means that the optical fiber link fault diagnosis equipment (such as OTDR equipment) transmits a detection signal from the trunk optical fiber end to the network, and the signal will be distributed to N branch optical fibers (i.e., all branch optical fibers) by the splitter; and when the reflected signal returns, the reflection information of the N branch optical fibers will be simultaneously converged to the trunk optical fiber, and finally form an OTDR detection curve. By comparing the OTDR detection curve with the preset health curve, the fault diagnosis result can be obtained.

[0101] Among them, the fault diagnosis result obtained after fault diagnosis of all branch optical fibers of the optical line terminal is that a preset type of vibration event occurs and the branch optical fiber has abnormal performance parameters. Therefore, the fault diagnosis result can be confirmed as the fault diagnosis result of the branch optical fiber that has a preset type of vibration event and abnormal performance parameters of the optical fiber link, thereby achieving the purpose of distinguishing and locating branch optical fiber faults.

[0102] The fault diagnosis results for the branch optical fibers corresponding to the FTTR master device refer to the fault diagnosis results obtained after fault diagnosis of all branch optical fibers of the optical line terminal. The fault diagnosis results for the branch optical fibers corresponding to the FTTR master device can include the specific fault event, the type of vibration event, optical fiber link performance parameters, fault diagnosis curves, etc.

[0103] Exemplarily, the FTTR main device determines whether the performance parameters of the optical fiber link between the optical line terminal and the FTTR main device are abnormal. If so, a fiber optic link fault diagnosis instruction is generated and sent to the optical line terminal. The optical line terminal sends the received fiber optic link fault diagnosis instruction to the fiber optic link fault diagnosis device (such as an OTDR device, an OTDR test board). The fiber optic link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal according to the received fiber optic link fault diagnosis instruction to obtain a fault diagnosis result. For example, the fault diagnosis is performed on all branch optical fibers of the optical line terminal to obtain a fault diagnosis curve (such as an OTDR detection curve), and the fault diagnosis curve is compared with a preset health curve to determine a new fault event. Based on the new fault event, a fault diagnosis result is obtained; finally, the fault diagnosis result is used as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0104] For example, refer to Figure 6If the computing module in the FTTR main device identifies that the optical fiber link performance of the branch optical fiber has deteriorated based on the optical fiber link performance parameters, the generated OTDR detection instruction is sent to the OLT device through the PON communication module in the FTTR main device; the OLT device sends the received OTDR detection instruction to the OTDR test board; the OTDR test board performs fault diagnosis on all branch optical fibers of the OLT device according to the received OTDR detection instruction, obtains a fault diagnosis result, and associates the fault diagnosis result with the branch optical fiber where a preset type of vibration event occurs and the optical fiber link performance parameters are abnormal, thereby obtaining a fault diagnosis result for the branch optical fiber.

[0105] In the above-mentioned optical fiber link fault diagnosis method, optical fiber vibration detection is performed on the branch optical fiber corresponding to the FTTR main device through the FTTR main device; then, when it is detected that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, the optical fiber link performance parameters between the optical line terminal and the FTTR main device are obtained; finally, when the optical fiber link performance parameters are abnormal, an optical fiber link fault diagnosis instruction is sent to the optical line terminal; the optical line terminal is used to send the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis device, so that the optical fiber link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal, obtains the fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device; in this way, when performing optical fiber link fault diagnosis, During diagnosis, the optical fiber vibration detection and optical fiber link performance parameter detection are first used to locate the branch optical fiber where a preset type of vibration event has occurred and the optical fiber link performance parameters are abnormal; then the optical fiber link fault diagnosis equipment is triggered to perform fault diagnosis on all branch optical fibers of the optical line terminal to obtain a fault diagnosis result; because the fault diagnosis result is caused by the branch optical fiber where a preset type of vibration event has occurred and the optical fiber link performance parameters are abnormal, the fault diagnosis result is confirmed as the fault diagnosis result of the branch optical fiber where a preset type of vibration event has occurred and the optical fiber link performance parameters are abnormal, thereby achieving the purpose of distinguishing and locating branch optical fiber faults, which is conducive to accurately locating the faulty branch optical fiber and its corresponding fault diagnosis result, thereby improving the accuracy of optical fiber link fault diagnosis.

[0106] In an example embodiment, before the step S202, in the case that the vibration event corresponding to the branch optical fiber is determined to be a vibration event of a preset type, the step S202 further includes the following steps: obtaining vibration data of the vibration event corresponding to the branch optical fiber; inputting the vibration data into a pre-trained vibration event recognition model to obtain an event type of the vibration event corresponding to the branch optical fiber; in the case that the event type is the preset type, determining that the vibration event corresponding to the branch optical fiber is the vibration event of the preset type; and in the case that the event type is not the preset type, determining that the vibration event corresponding to the branch optical fiber is not the vibration event of the preset type, and jumping to the step of detecting the fiber vibration of the branch optical fiber corresponding to the FTTR master device.

[0107] The vibration data refers to optical signal change information caused by the vibration event in the branch optical fiber link and capable of reflecting the vibration characteristics. Specifically, the vibration data refers to optical signal parameters (such as phase change amount, scattered light intensity fluctuation value, vibration frequency spectrum, etc.) and analysis data derived therefrom related to the vibration event on the branch optical fiber collected by a sensing module or a vibration detection device.

[0108] The pre-trained vibration event recognition model refers to a model capable of identifying the event type of the vibration event corresponding to the branch optical fiber, such as a neural network model, a deep learning model, an artificial intelligence large model, etc.

[0109] The preset type refers to pulling the optical fiber, extruding the optical fiber, biting the optical fiber, etc.

[0110] For example, the FTTR master device obtains the vibration data of the vibration event corresponding to the branch optical fiber, and performs feature extraction processing on the vibration data to obtain a feature vector corresponding to the vibration data. Then, the feature vector corresponding to the vibration data is input into the pre-trained vibration event recognition model, and the vibration event recognition model is used to perform classification prediction processing on the feature vector to obtain a plurality of event types and a prediction probability corresponding to each event type. The event type with the maximum prediction probability is selected from the plurality of event types as the event type of the vibration event corresponding to the branch optical fiber. Then, it is determined whether the event type of the vibration event corresponding to the branch optical fiber is the preset type. If yes, it is determined that the vibration event corresponding to the branch optical fiber is the vibration event of the preset type. If no, it is determined that the vibration event corresponding to the branch optical fiber is not the vibration event of the preset type, and the step of detecting the fiber vibration of the branch optical fiber corresponding to the FTTR master device is jumped to.

[0111] For example, refer to Figure 6After the computing module in the FTTR master device receives the vibration detection parameters reported by the sensor module in the FTTR master device, 1) it completes vibration data learning and analysis to infer whether it is a typical vibration event (the upstream OLT optical fiber and the downstream ONU slave optical fiber have different types of typical vibration events); 2) if it infers an atypical vibration event (normal vibration, not normal vibration caused by pulling / squeezing / biting the optical fiber), the sensor module does not report it to the PON communication module; once a typical vibration event occurs, it reports it to the PON communication module in the FTTR master device, and the PON communication module completes the query of the transmit and receive optical power of the master device's upstream OLT PON optical module; then the computing module completes the reception and receive optical power information of the OLT optical module and combines these two sets of data to calculate the optical link performance; 3) once it is calculated that the optical link performance has deteriorated (compared with the healthy database), it reports it to the PON communication module, thereby triggering the local OTDR module to perform OTDR detection; if it is calculated that the optical link performance has not deteriorated (that is, pulling / squeezing / biting the optical fiber has not caused performance degradation), it does not report it to the PON communication module and does not perform OTDR detection.

[0112] In this embodiment, the vibration data of the vibration event corresponding to the branch optical fiber is processed through a pre-trained vibration event recognition model, which is conducive to accurately identifying the event type of the vibration event corresponding to the branch optical fiber, and further conducive to accurately judging whether the vibration event corresponding to the branch optical fiber is a preset type of vibration event.

[0113] In an exemplary embodiment, the above-mentioned step S202, obtaining the optical fiber link performance parameters between the optical line terminal and the FTTR main device, specifically includes the following contents: obtaining the first receiving and transmitting optical power information of the optical module of the optical line terminal, and obtaining the second receiving and transmitting optical power information of the optical module of the FTTR main device; based on the first receiving and transmitting optical power information and the second receiving and transmitting optical power information, determining the optical fiber link loss parameter between the optical line terminal and the FTTR main device; and using the optical fiber link loss parameter as the optical fiber link performance parameter between the optical line terminal and the FTTR main device.

[0114] The first transmit and receive optical power information includes a first transmit optical power and a first receive optical power.

[0115] The optical module of the FTTR main device refers to the optical module of the optical line terminal (OLT) connected to the FTTR main device.

[0116] The second transmit and receive optical power information includes a second transmit optical power and a second receive optical power.

[0117] Among them, the optical fiber link loss parameter can refer to the downlink loss (i.e., the difference between the first transmitted optical power and the second received optical power), or the uplink loss (i.e., the difference between the second transmitted optical power and the first received optical power), or the average value of the downlink loss and the uplink loss.

[0118] For example, refer to Figure 6 The computing power module in the FTTR main device sends a first query instruction and a second query instruction to the PON communication module in the FTTR main device. The PON communication module sends the first query instruction to the optical line terminal (OLT). Based on the first query instruction, the optical line terminal (OLT) obtains the first receive / receive optical power information of the optical module of the optical line terminal, and sends the first receive / receive optical power information of the optical module of the optical line terminal to the PON communication module. The PON communication module sends the first receive / receive optical power information to the computing power module. At the same time, based on the second query instruction, the PON communication module obtains the second receive / receive optical power information of the optical module of the optical line terminal (OLT) connected to the FTTR main device, and sends the second receive / receive optical power information to the computing power module. Based on the first receive / receive optical power information and the second receive / receive optical power information, the computing power module calculates the optical fiber link loss parameter between the optical line terminal and the FTTR main device as the optical fiber link performance parameter between the optical line terminal and the FTTR main device. For example, the computing power module extracts the first transmitted optical power and the first received optical power from the first transmitted optical power information, and extracts the second transmitted optical power and the second received optical power from the second transmitted optical power information, and then calculates the difference between the first transmitted optical power and the second received optical power as the downlink loss between the optical line terminal and the FTTR main device, and calculates the difference between the second transmitted optical power and the first received optical power as the uplink loss between the optical line terminal and the FTTR main device, and finally uses the downlink loss or uplink loss or the average of the downlink loss and the uplink loss as the optical fiber link loss parameter between the optical line terminal and the FTTR main device.

[0119] For example, the transmit optical power P1 of the optical module connected to the OLT on the FTTR master device is +2dBm, and the receive optical power P2 is -22dBm. The transmit optical power P3 of the optical module on the OLT device is +4dBm, and the receive optical power P4 is -24dBm. Fiber link loss is calculated in two directions: from OLT to FTTR (downlink) and from FTTR to OLT (uplink). The calculation formula is: Downlink link loss (L_down) = OLT transmit power (P3) - FTTR receive power (P2), i.e., L_down = 4dBm - (-22dBm) = 26dB. Uplink loss (L_up) = FTTR transmit power (P1) - OLT receive power (P4), i.e., L_up = 2dBm - (-24dBm) = 26dB. In practical applications, the average of the bidirectional loss (or unidirectional loss, depending on the scenario) is usually taken as the current link loss value, which is 26dB in this case.

[0120] In this embodiment, when calculating the performance parameters of the optical fiber link between the optical line terminal and the FTTR main device, the first received and received optical power information of the optical module of the optical line terminal and the second received and received optical power information of the optical module of the FTTR main device are comprehensively considered, which is conducive to improving the accuracy of determining the performance parameters of the optical fiber link.

[0121] In an exemplary embodiment, the above-mentioned step S203, in the case where an abnormality occurs in the optical fiber link performance parameters, before sending the optical fiber link fault diagnosis instruction to the optical line terminal, also includes the following content: obtaining the difference between the optical fiber link performance parameters and the preset link performance parameters; when the difference is greater than the preset threshold, determining that an abnormality occurs in the optical fiber link performance parameters; when the difference is less than or equal to the preset threshold, determining that no abnormality occurs in the optical fiber link performance parameters, and jumping to the step of performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device.

[0122] Among them, the preset link performance parameter refers to the loss value when the link is normal (which can be calibrated and recorded when the equipment is installed), which is used to represent the health value.

[0123] The preset link performance parameter refers to a preset link loss parameter.

[0124] For example, refer to Figure 6The computing power module in the FTTR main device calculates the difference between the optical fiber link performance parameter and the preset link performance parameter, and compares the difference with the preset threshold value. When the difference is greater than the preset threshold value, it is determined that the optical fiber link performance parameter is abnormal, that is, the optical fiber link performance is degraded, indicating that there is a fault event in the optical fiber link; when the difference is less than or equal to the preset threshold value, it is determined that the optical fiber link performance parameter is not abnormal, that is, the optical fiber link performance is not degraded, indicating that there is no fault event in the optical fiber link, and jumps to the step of performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device.

[0125] For example, assuming that the optical fiber link loss parameter is 26dB, the preset link loss parameter is 22dB, and the preset threshold is 3dB, then the difference between the optical fiber link loss parameter and the preset link loss parameter is 26dB-22dB=4dB, which is greater than 3dB, that is, exceeds the preset threshold, indicating that the optical fiber link performance of the branch optical fiber has deteriorated.

[0126] In this embodiment, by obtaining the difference between the optical fiber link performance parameter and the preset link performance parameter and comparing the difference with the preset threshold, it is helpful to accurately determine whether the optical fiber link performance parameter is abnormal, thereby improving the accuracy of abnormal identification of the optical fiber link performance parameter.

[0127] In an exemplary embodiment, the FTTR main device includes a fiber optic sensing module, a wavelength division multiplexing module, a computing power module and a passive optical network communication module; the computing power module is respectively connected to the passive optical network communication module and the fiber optic sensing module; the wavelength division multiplexing module is respectively connected to the passive optical network communication module and the fiber optic sensing module.

[0128] Among them, the optical fiber sensing module (i.e., the sensing module) is used to undertake qualitative vibration measurement, specifically to complete vibration detection of the optical fiber in the direction of the upstream OLT device to assist in locating the faulty branch optical fiber, and to complete vibration detection in the direction of the downstream ONU slave device for home smart applications (such as illegal intrusion, people falling, etc.).

[0129] Among them, the wavelength division multiplexing (WDM) module is used to complete the multiplexing / demultiplexing of the working wavelengths used for the three communications of the FTTR master device's upstream OLT optical module, the downstream slave device optical module, and the sensor module's optical module, as well as to complete the multiplexing / demultiplexing of the working wavelengths used for sensing in the upstream OLT direction and the downstream ONU slave device direction.

[0130] Among them, the computing power module is used to undertake statistical analysis of optical fiber link performance and trigger OTDR detection instructions. Specifically, it is used to complete the query of the receive and receive optical power of the OLT PON optical module connected to the FTTR main equipment, complete the reception of the receive and receive optical power information of the OLT optical module, and calculate the performance of the optical link. It is also used to complete vibration data learning, analysis and reasoning.

[0131] Among them, the passive optical network communication module refers to the PON communication module, which is used to assume the original PON communication function.

[0132] It should be noted that the reference Figure 6 ,This application adds three new hardware modules in the FTTR main equipment, namely the ,sensor module, WDM module, and computing power module.

[0133] For example, refer to Figure 6 The FTTR master device includes a sensor module, a WDM module, a computing power module (for computing and storage), and a PON communication module. The computing power module is connected to the PON communication module and the sensor module, respectively; the WDM module is connected to the PON communication module and the sensor module. The sensor module is used to perform vibration detection 1 and vibration detection 2; the PON communication module is used to connect to the OLT upstream and the ONU slave devices downstream.

[0134] In this embodiment, by adding a fiber optic sensing module, a wavelength division multiplexing module and a computing power module to the FTTR main device, not only can branch optical fiber vibration monitoring be achieved, but the system can also be assisted in completing branch optical fiber confirmation and optical fiber link fault diagnosis, thereby improving the accuracy of optical fiber link fault diagnosis.

[0135] In an exemplary embodiment, Figure 3 As shown, another optical fiber link fault diagnosis method is provided, which is applied to Figure 1 The optical fiber link fault diagnosis device in the embodiment is used as an example to illustrate the method, which includes the following steps S301 to S303.

[0136] Step S301, receiving the optical fiber link fault diagnosis instruction sent by the optical line terminal; the FTTR main device is used to perform optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device, and when it is detected that the vibration event corresponding to the branch optical fiber is a preset type of vibration event, obtain the optical fiber link performance parameters between the optical line terminal and the FTTR main device, and when the optical fiber link performance parameters are abnormal, send the optical fiber link fault diagnosis instruction to the optical line terminal.

[0137] Step S302: Perform fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction to obtain a fault diagnosis result.

[0138] Step S303: The fault diagnosis result is used as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0139] Exemplarily, the FTTR main device performs optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device. When a vibration event is detected in the branch optical fiber, and the vibration event corresponding to the branch optical fiber is a preset type of vibration event, the optical fiber link performance parameters between the optical line terminal and the FTTR main device are obtained, and then a determination is made as to whether an abnormality has occurred in the optical fiber link performance parameters. If an abnormality has occurred in the optical fiber link performance parameters, an optical fiber link fault diagnosis instruction is sent to the optical line terminal. The optical line terminal sends the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis device. The optical fiber link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal according to the received optical fiber link fault diagnosis instruction, obtains a fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result for the branch optical fiber corresponding to the FTTR main device.

[0140] It should be noted that, for the specific limitations of the embodiments of the optical fiber link fault diagnosis method applied to the optical fiber link fault diagnosis device, reference may be made to the relevant embodiments of the optical fiber link fault diagnosis method applied to the FTTR main device, which will not be repeated here.

[0141] In the above-mentioned optical fiber link fault diagnosis method, an optical fiber link fault diagnosis instruction sent by an optical line terminal is received by an optical fiber link fault diagnosis device. Then, according to the optical fiber link fault diagnosis instruction, a fault diagnosis is performed on all branch optical fibers of the optical line terminal to obtain a fault diagnosis result. Finally, the fault diagnosis result is used as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device. In this way, when performing optical fiber link fault diagnosis, optical fiber vibration detection and optical fiber link performance parameter detection are first used to locate the branch optical fiber that has experienced a preset type of vibration event and has abnormal optical fiber link performance parameters. Then, the optical fiber link fault diagnosis device is triggered to perform fault diagnosis on all branch optical fibers of the optical line terminal to obtain a fault diagnosis result. Since the fault diagnosis result is caused by the branch optical fiber that has experienced a preset type of vibration event and has abnormal optical fiber link performance parameters, the fault diagnosis result is confirmed as the fault diagnosis result of the branch optical fiber that has experienced a preset type of vibration event and has abnormal optical fiber link performance parameters. This achieves the purpose of distinguishing and locating branch optical fiber faults, facilitates the precise location of the faulty branch optical fiber and its corresponding fault diagnosis result, and thus improves the accuracy of optical fiber link fault diagnosis.

[0142] In an exemplary embodiment, the above step S302 performs fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction to obtain a fault diagnosis result, which specifically includes the following contents: performs fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction to obtain a fault diagnosis curve; compares the fault diagnosis curve with a preset health curve to obtain a comparison result; determines a new fault event based on the comparison result; and determines a fault diagnosis result based on the new fault event.

[0143] The fault diagnosis curve may refer to the OTDR detection curve. Figure 5 The curve in .

[0144] The preset health curve refers to a normal curve of the optical fiber link.

[0145] The newly added fault events refer to the fault events that are newly added relative to the preset health curve.

[0146] Among them, the fault diagnosis results refer to newly added fault events, such as optical fiber break points and loss points.

[0147] For example, the optical fiber link fault diagnosis device (such as an OTDR device) performs fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction, obtains a fault diagnosis curve (such as an OTDR detection curve), then obtains a preset health curve, and compares the fault diagnosis curve with the preset health curve to obtain a comparison result, that is, the difference information between the fault diagnosis curve and the preset health curve. For details, refer to Figure 5 Finally, based on the comparison result (i.e., difference information), the corresponding relationship between the comparison result and the fault event is queried to obtain the fault event corresponding to the comparison result as a new fault event, and the new fault event is used as the fault diagnosis result. Figure 5 ,The fault event corresponding to the peak in the curve is the fault diagnosis result.

[0148] In this embodiment, according to the optical fiber link fault diagnosis instruction, fault diagnosis is performed on all branch optical fibers of the optical line terminal to obtain a fault diagnosis curve, and the fault diagnosis curve is compared with the preset health curve to obtain a comparison result; based on the comparison result, a new fault event is determined as the fault diagnosis result; in this way, the purpose of determining the fault diagnosis result by comparing the fault diagnosis curve with the preset health curve is achieved, which can make the determined fault diagnosis result more accurate, thereby improving the accuracy of fault diagnosis.

[0149] In an exemplary embodiment, Figure 4 As shown, another optical fiber link fault diagnosis method is provided, which is applied toFigure 1 The FTTR main device in FIG. 1 is taken as an example to illustrate the method, which includes the following steps S401 to S407. In which:

[0150] Step S401: performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device.

[0151] Step S402 , obtaining vibration data of a vibration event corresponding to the branch optical fiber; inputting the vibration data into a pre-trained vibration event recognition model to obtain an event type of the vibration event corresponding to the branch optical fiber.

[0152] Step S403: When the event type is a preset type, determining that the vibration event corresponding to the branch optical fiber is a vibration event of the preset type.

[0153] In addition, when the event type is not the preset type, it is determined that the vibration event corresponding to the branch optical fiber is not the preset type of vibration event, and the process jumps to the step of performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device.

[0154] Step S404: obtaining first transceiver optical power information of the optical module of the optical line terminal, and obtaining second transceiver optical power information of the optical module of the FTTR main device.

[0155] Step S405: Determine the optical fiber link loss parameter between the optical line terminal and the FTTR main device based on the first received and received optical power information and the second received and received optical power information; and use the optical fiber link loss parameter as the optical fiber link performance parameter between the optical line terminal and the FTTR main device.

[0156] Step S406: obtaining a difference between the optical fiber link performance parameter and a preset link performance parameter; if the difference is greater than a preset threshold, determining that an abnormality has occurred in the optical fiber link performance parameter.

[0157] In addition, when the difference is less than or equal to the preset threshold, it is determined that there is no abnormality in the optical fiber link performance parameter, and the process jumps to the step of performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device.

[0158] Step S407, sending an optical fiber link fault diagnosis instruction to the optical line terminal; the optical line terminal is used to send the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis device, so that the optical fiber link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal, obtains a fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0159] Among them, the optical fiber link fault diagnosis equipment performs fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction to obtain a fault diagnosis curve; compares the fault diagnosis curve with a preset health curve to obtain a comparison result; based on the comparison result, determines a new fault event; and based on the new fault event, determines a fault diagnosis result.

[0160] In the above-mentioned optical fiber link fault diagnosis method, when performing optical fiber link fault diagnosis, optical fiber vibration detection and optical fiber link performance parameter detection are first used to locate the branch optical fiber where a preset type of vibration event occurs and the optical fiber link performance parameters are abnormal; then the optical fiber link fault diagnosis equipment is triggered to perform fault diagnosis on all branch optical fibers of the optical line terminal to obtain a fault diagnosis result; because the fault diagnosis result is caused by the branch optical fiber where a preset type of vibration event occurs and the optical fiber link performance parameters are abnormal, the fault diagnosis result is confirmed as the fault diagnosis result of the branch optical fiber where a preset type of vibration event occurs and the optical fiber link performance parameters are abnormal, thereby achieving the purpose of distinguishing and locating branch optical fiber faults, which is conducive to accurately locating the faulty branch optical fiber and its corresponding fault diagnosis result, thereby improving the accuracy of optical fiber link fault diagnosis.

[0161] In order to more clearly illustrate the optical fiber link fault diagnosis method provided by the embodiment of the present application, the optical fiber link fault diagnosis method is specifically described below using a specific embodiment. In an exemplary embodiment, Figure 7 As shown, this application also provides a method for diagnosing optical fiber link faults in an FTTR network. A fiber optic sensor module is built into the FTTR main device to complete branch optical fiber vibration monitoring, and the auxiliary system completes branch optical fiber confirmation and optical fiber link fault diagnosis. The specific content is as follows:

[0162] refer to Figure 6, the hardware device includes: a fiber-to-the-room PON main device (i.e., a FTTR main device), which has a built-in PON communication module, a fiber optic sensing module, and a computing power module. The PON communication module assumes the original PON communication function, the fiber optic sensing module assumes the qualitative vibration measurement, and the computing power module assumes the statistical analysis of the fiber optic link performance and triggers the OTDR detection instruction. Among them, the fiber optic link fault diagnosis method includes: the FTTR main device actively initiates the fiber optic sensing vibration qualitative measurement of the branch optical fiber, and when the analysis determines that the specified type of vibration event is detected, the measurement result is sent to the computing power module, and the computing power module triggers the performance statistics of the optical transceiver power of the OLT and the FTTR main device optical module on the optical fiber link where the FTTR main device is located. When the computing power module performs performance calculation and analysis based on the health database and determines that the performance of the optical fiber link has deteriorated, it reports to the FTTR main device PON communication module. The FTTR main device PON communication module reports to the OLT device, triggering the OTDR module on the central office OLT side to carry out fault measurement and diagnosis of the optical fiber link. Finally, the OTDR diagnostic results are associated with the branch optical fiber where the specified type of vibration event occurs, and a fault detection and diagnosis report for the branch optical fiber is generated.

[0163] For example, the relevant diagnostic process is as follows: (1) Active detection of the FTTR main device: avoids the traditional local end OTDR polling detection, which can not only quickly detect faults but also reduce the frequency of OTDR polling detection (saving energy and increasing the service life of OTDR / optical switch). (2) Active detection working mechanism based on the FTTR main device - optical fiber vibration detection: the sensor module performs vibration detection according to the strategy / cycle. Once a vibration event is detected in the upstream / downstream branch optical fiber, the event alarm is reported to the computing power module. The computing power module is responsible for the calculation and analysis of the sensor vibration data collected to determine whether a vibration event that causes the degradation of the optical fiber link performance (such as pulling / squeezing / biting the optical fiber) has occurred. (3) Vibration detection based on the upstream OLT optical fiber - when a vibration event is detected in the upstream branch optical fiber, the computing power module sends a command to the FTTR local PON communication module to query the transmit and receive optical power index of the upstream OLT optical module, and at the same time sends a command to the OLT device to query the transmit and receive optical power index of the OLT optical module, and calculates the optical link performance (OLT-FTTR main device optical link loss) based on the two sets of data. When the comparison between the optical link performance and the health value exceeds the set threshold, it is considered that there is a fault event in the optical link. The computing power module sends instructions to the FTTR local PON communication module and reports to the central office OLT device. The central office device / platform controls the OTDR module to carry out OTDR detection. The OTDR detection curve is compared with the health curve to find new fault events, which are associated with the branch optical fiber where the vibration event occurs; the management platform can be reported to issue a maintenance work order. (4) Vibration detection based on the branch optical fiber of the downstream ONU slave device - When a vibration event is detected in the branch optical fiber of the downstream slave device, the computing power module receives the data collected by the sensor module and can use the relevant model to carry out intelligent analysis to determine the type of vibration event as illegal intrusion (such as optical fiber vibration at the door / window) or family member falling (optical fiber vibration in specific family areas such as the bathroom / kitchen).

[0164] For example, reference Figure 7The FTTR master device proactively initiates qualitative fiber-optic vibration measurement of branch fibers (including those branching to the OLT and those branching to the FTTR ODN of the slave device). When a vibration event is detected, the measurement results are sent to the computing module. The computing module performs computational analysis of the collected vibration data, characterizes the vibration event, and determines whether a vibration event has occurred that has degraded the fiber link performance. When a vibration event of a specified type is detected, it is reported to the PON communication module, triggering performance statistics for the fiber link where the FTTR master device resides. The PON OLT and FTTR master device collaborate to query and count the receive / transmit optical power of the built-in optical modules of the central office OLT and terminal-side FTTR master devices. This receive / transmit optical power data is sent to the computing module for real-time calculation and comparison with the health value to determine whether fiber link performance has degraded. If fiber link performance is determined to have degraded, the FTTR master device's PON communication module reports this to the OLT, triggering the OTDR equipment on the central office OLT to perform fiber link fault measurement and diagnosis. The fault events of all branch optical fiber links detected by the OTDR are associated with the branch where vibration occurs, and finally a fault diagnosis result of the branch optical fiber where vibration event occurs and optical fiber link performance deteriorates is formed.

[0165] The above embodiments can achieve the following technical effects: (1) When providing broadband access services to high-quality broadband users using the FTTR-B method, the FTTR main device with vibration detection function can be used as an anchor point to provide fault diagnosis and integrated application services of telemetry. (2) In other customized industry scenarios, when the maintenance of PON ODN branch optical fibers is restricted by special environments such as high temperature and high-risk environments and fault detection cannot be easily carried out by installation and maintenance personnel, this application can be used to improve the quality of PON ODN. (3) With the help of optical fiber sensing technology, the accuracy and detection efficiency of PON ODN branch optical fiber fault diagnosis can be improved, thereby reducing network operation and maintenance costs for operators and improving network operation quality.

[0166] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily performed in sequence in the order indicated by the arrows. Unless clearly stated herein, the execution of these steps is not strictly limited in order, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times, and the execution order of these steps or stages is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of the steps or stages in other steps or other steps. It is understandable that the various steps in different embodiments can be freely combined as needed, and the various non-contradictory schemes formed by the combination all fall within the scope of protection of this application.

[0167] Based on the same inventive concept, embodiments of the present application further provide a fiber optic link fault diagnosis device for implementing the aforementioned fiber optic link fault diagnosis method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more embodiments of the fiber optic link fault diagnosis device provided below can be found in the aforementioned limitations of the fiber optic link fault diagnosis method and will not be further elaborated here.

[0168] In an exemplary embodiment, Figure 8 As shown, a fiber link fault diagnosis device 800 is provided, which is applied to an FTTR main device, including: a vibration detection module 810, a parameter acquisition module 820 and an instruction sending module 830, wherein:

[0169] The vibration detection module 810 is used to perform optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device.

[0170] The parameter acquisition module 820 is configured to acquire the performance parameters of the optical fiber link between the optical line terminal and the FTTR main device when detecting that the vibration event corresponding to the branch optical fiber is a preset type of vibration event.

[0171] The instruction sending module 830 is used to send an optical fiber link fault diagnosis instruction to the optical line terminal when an abnormality occurs in the optical fiber link performance parameters; the optical line terminal is used to send the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis device, so that the optical fiber link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal, obtains the fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0172] In an exemplary embodiment, the optical fiber link fault diagnosis device 800 also includes a type identification module for obtaining vibration data of a vibration event corresponding to a branch optical fiber; inputting the vibration data into a pre-trained vibration event identification model to obtain the event type of the vibration event corresponding to the branch optical fiber; when the event type is a preset type, determining that the vibration event corresponding to the branch optical fiber is a vibration event of the preset type; when the event type is not a preset type, determining that the vibration event corresponding to the branch optical fiber is not a vibration event of the preset type, and jumping to the step of performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device.

[0173] In an exemplary embodiment, the parameter acquisition module 820 is also used to obtain first received and received optical power information of the optical module of the optical line terminal, and to obtain second received and received optical power information of the optical module of the FTTR main device; based on the first received and received optical power information and the second received and received optical power information, determine the optical fiber link loss parameter between the optical line terminal and the FTTR main device; and use the optical fiber link loss parameter as the optical fiber link performance parameter between the optical line terminal and the FTTR main device.

[0174] In an exemplary embodiment, the optical fiber link fault diagnosis device 800 also includes a parameter judgment module for obtaining the difference between the optical fiber link performance parameter and the preset link performance parameter; when the difference is greater than the preset threshold, it is determined that the optical fiber link performance parameter is abnormal; when the difference is less than or equal to the preset threshold, it is determined that the optical fiber link performance parameter is not abnormal, and the process jumps to the step of performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device.

[0175] In an exemplary embodiment, the FTTR main device includes a fiber optic sensing module, a wavelength division multiplexing module, a computing power module and a passive optical network communication module; the computing power module is respectively connected to the passive optical network communication module and the fiber optic sensing module; the wavelength division multiplexing module is respectively connected to the passive optical network communication module and the fiber optic sensing module.

[0176] In an exemplary embodiment, Figure 9 As shown, another optical fiber link fault diagnosis device 900 is provided, which is applied to an optical fiber link fault diagnosis device, including: an instruction receiving module 910, a fault diagnosis module 920 and a result determination module 930, wherein:

[0177] The instruction receiving module 910 is used to receive the optical fiber link fault diagnosis instruction sent by the optical line terminal; the FTTR main device is used to perform optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device, and when it is detected that the vibration event corresponding to the branch optical fiber is a preset type of vibration event, the optical fiber link performance parameters between the optical line terminal and the FTTR main device are obtained, and when the optical fiber link performance parameters are abnormal, the optical fiber link fault diagnosis instruction is sent to the optical line terminal.

[0178] The fault diagnosis module 920 is configured to perform fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction to obtain a fault diagnosis result.

[0179] The result determination module 930 is configured to use the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

[0180] In an exemplary embodiment, the fault diagnosis module 920 is also used to perform fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction to obtain a fault diagnosis curve; compare the fault diagnosis curve with a preset health curve to obtain a comparison result; determine a new fault event based on the comparison result; and determine a fault diagnosis result based on the new fault event.

[0181] Each module in the aforementioned optical fiber link fault diagnosis device can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in the computer device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0182] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 10As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface, the display unit and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a method for diagnosing optical fiber link faults is implemented. The display unit of the computer device is used to form a visually visible image, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device casing, or an external keyboard, touchpad or mouse.

[0183] Those skilled in the art will understand that Figure 10 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0184] In an exemplary embodiment, a computer device is further provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0185] In an exemplary embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0186] In an exemplary embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0187] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0188] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile memory and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processor (DSP), a programmable logic unit (PLC), a data processing logic unit based on quantum computing, an artificial intelligence (AI) processor, and the like.

[0189] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0190] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for diagnosing optical fiber link faults, characterized in that: Applied to FTTR main equipment, the method includes: Performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device; When it is detected that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, obtaining the optical fiber link performance parameters between the optical line terminal and the FTTR main device; In the event that an abnormality occurs in the optical fiber link performance parameters, an optical fiber link fault diagnosis instruction is sent to the optical line terminal; the optical line terminal is used to send the optical fiber link fault diagnosis instruction to the optical fiber link fault diagnosis device, so that the optical fiber link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal, obtains a fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

2. The method according to claim 1, characterized in that When it is detected that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, before obtaining the optical fiber link performance parameter between the optical line terminal and the FTTR main device, the method further includes: Acquiring vibration data of a vibration event corresponding to the branch optical fiber; Inputting the vibration data into a pre-trained vibration event recognition model to obtain an event type of the vibration event corresponding to the branch optical fiber; In a case where the event type is the preset type, determining that the vibration event corresponding to the branch optical fiber is a vibration event of the preset type; When the event type is not the preset type, it is determined that the vibration event corresponding to the branch optical fiber is not the preset type of vibration event, and the process jumps to the step of performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device.

3. The method according to claim 1, characterized in that The obtaining of the optical fiber link performance parameters between the optical line terminal and the FTTR main device includes: Acquire first transmit / receive optical power information of the optical module of the optical line terminal, and acquire second receive / receive optical power information of the optical module of the FTTR master device; determining, based on the first received and received optical power information and the second received and received optical power information, an optical fiber link loss parameter between the optical line terminal and the FTTR main device; The optical fiber link loss parameter is used as the optical fiber link performance parameter between the optical line terminal and the FTTR main device.

4. The method according to claim 1, wherein In the case where the optical fiber link performance parameter is abnormal, before sending the optical fiber link fault diagnosis instruction to the optical line terminal, the method further includes: Obtaining a difference between the optical fiber link performance parameter and a preset link performance parameter; When the difference is greater than a preset threshold, determining that the optical fiber link performance parameter is abnormal; When the difference is less than or equal to the preset threshold, it is determined that the optical fiber link performance parameter is not abnormal, and the process jumps to the step of performing optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device.

5. The method according to claim 1, wherein The FTTR main equipment includes an optical fiber sensing module, a wavelength division multiplexing module, a computing power module and a passive optical network communication module; The computing power module is connected to the passive optical network communication module and the optical fiber sensing module respectively; the wavelength division multiplexing module is connected to the passive optical network communication module and the optical fiber sensing module respectively.

6. A method for diagnosing optical fiber link faults, characterized in that: Applied to optical fiber link fault diagnosis equipment, the method includes: receiving an optical fiber link fault diagnosis instruction sent by an optical line terminal; the FTTR master device is used to perform optical fiber vibration detection on a branch optical fiber corresponding to the FTTR master device, and when detecting that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, obtain optical fiber link performance parameters between the optical line terminal and the FTTR master device; and when the optical fiber link performance parameters are abnormal, send the optical fiber link fault diagnosis instruction to the optical line terminal; Performing fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction to obtain a fault diagnosis result; The fault diagnosis result is used as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

7. The method according to claim 6, characterized in that The step of performing fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction to obtain a fault diagnosis result includes: Performing fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction to obtain a fault diagnosis curve; Comparing the fault diagnosis curve with a preset health curve to obtain a comparison result; Based on the comparison result, determining a newly added fault event; A fault diagnosis result is determined based on the newly added fault event.

8. An optical fiber link fault diagnosis device, characterized in that: Applied to FTTR main equipment, the device includes: A vibration detection module, configured to perform optical fiber vibration detection on the branch optical fiber corresponding to the FTTR main device; a parameter acquisition module, configured to acquire performance parameters of the optical fiber link between the optical line terminal and the FTTR main device when detecting that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type; An instruction sending module is used to send an optical fiber link fault diagnosis instruction to an optical line terminal when an abnormality occurs in the optical fiber link performance parameters; the optical line terminal is used to send the optical fiber link fault diagnosis instruction to an optical fiber link fault diagnosis device, so that the optical fiber link fault diagnosis device performs fault diagnosis on all branch optical fibers of the optical line terminal, obtains a fault diagnosis result, and uses the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

9. An optical fiber link fault diagnosis device, characterized in that: Applicable to optical fiber link fault diagnosis equipment, the device includes: an instruction receiving module for receiving an optical fiber link fault diagnosis instruction sent by an optical line terminal; the FTTR master device is used to perform optical fiber vibration detection on a branch optical fiber corresponding to the FTTR master device, and when detecting that the vibration event corresponding to the branch optical fiber is a vibration event of a preset type, obtain optical fiber link performance parameters between the optical line terminal and the FTTR master device; and when the optical fiber link performance parameters are abnormal, send the optical fiber link fault diagnosis instruction to the optical line terminal; a fault diagnosis module, configured to perform fault diagnosis on all branch optical fibers of the optical line terminal according to the optical fiber link fault diagnosis instruction and obtain a fault diagnosis result; The result determination module is configured to use the fault diagnosis result as the fault diagnosis result of the branch optical fiber corresponding to the FTTR main device.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

12. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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