A fault positioning method and device, electronic equipment and storage medium

Abstract

This invention provides a fault location method, apparatus, electronic device, and storage medium, relating to the field of optical communication technology, for accurately determining the fault location of a semi-active wavelength division multiplexing (SDM) system. The method includes: after a service anomaly occurs, detecting whether the received optical power of the headend optical module is abnormal; if the received optical power of the headend optical module is abnormal, detecting whether the optical power of a first optical signal output from a first optical multiplexer / demultiplexer to the headend optical module is abnormal; if the optical power of the first optical signal is abnormal, detecting whether the optical power of a second optical signal output from a first serial communication interface to the first optical multiplexer / demultiplexer is abnormal; and if the optical power of the second optical signal is normal, determining that the headend equipment has failed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical communication technology, in particular to a fault positioning method and device, electronic equipment and storage medium. BACKGROUND

[0002] The 5G front-haul semi-active wavelength division multiplexing (WDM) system combines the advantages of passive and active WDM / optical transport network (OTN) schemes, can save fiber resources, reduce deployment costs, support front-haul network state monitoring and fault positioning, and make the front-haul network controllable, and has obvious advantages compared with the passive scheme. At present, the semi-active WDM system can realize certain operation, administration and maintenance (OAM) capability through optical power monitoring or optical power monitoring+optical module adjustment, and the network management system can issue corresponding alarms when a fault occurs, but it does not have the capability of automatically positioning the specific location of the fault, and the troubleshooting process still needs to use the traditional manual method, which relies on experience and is difficult to accurately determine the fault location. SUMMARY

[0003] The present application provides a fault positioning method, device, electronic equipment and storage medium for accurately determining the fault location of a semi-active wavelength division multiplexing system.

[0004] In a first aspect, a fault positioning method is provided, which is applied to a semi-active wavelength division multiplexing system. The semi-active wavelength division multiplexing system includes a head-end optical module, a head-end device, an optical fiber link, a tail-end device and a tail-end optical module connected in sequence. The head-end device includes a first optical multiplexer / demultiplexer and a first serial communication interface. The tail-end device includes a second serial communication interface and a second optical multiplexer / demultiplexer. The method includes:

[0005] After a service exception occurs, detecting whether the received optical power of the head-end optical module is abnormal;

[0006] In the case that the received optical power of the head-end optical module is abnormal, detecting whether the optical power of a first optical signal output from the first optical multiplexer / demultiplexer to the head-end optical module is abnormal;

[0007] In the case that the optical power of the first optical signal is abnormal, detecting whether the optical power of a second optical signal output from the first serial communication interface to the first optical multiplexer / demultiplexer is abnormal;

[0008] In the case that the optical power of the second optical signal is normal, determining that the head-end device has a fault.

[0009] The technical scheme provided by the application brings at least the following beneficial effects: after the service is abnormal, the received optical power of the head-end optical module in the semi-active wavelength division multiplexing system, the optical power of the first optical signal output to the head-end optical module by the first optical multiplexer / demultiplexer, and the optical power of the second optical signal output to the first optical multiplexer / demultiplexer by the first serial communication interface are monitored in sequence until the specific position of the fault causing the service to be abnormal in the system is determined. The position of the fault is determined only by experience, and the accuracy of determining the specific position of the fault in the semi-active wavelength division multiplexing system is improved.

[0010] In a possible implementation, in the case that the optical power of the second optical signal is abnormal, it is detected whether the OTDR system sends an alarm information; in the case that the OTDR system does not send the alarm information, it is determined that the tail-end optical module or the link between the tail-end optical module and the tail-end device is faulty; in the case that the OTDR system sends the alarm information, according to the alarm information, it is determined that the first serial communication interface, the second serial communication interface or the optical fiber link is faulty.

[0011] Based on the possible implementation, in the case that the optical power of the second optical signal is abnormal, the position of the fault is determined by judging whether the OTDR system sends an alarm information.

[0012] In another possible implementation, in the case that the received optical power of the head-end optical module is normal, it is detected whether the power of the third optical signal output to the first serial communication interface by the first optical multiplexer / demultiplexer is abnormal; in the case that the optical power of the third optical signal is abnormal, it is detected whether the power of the fourth optical signal output to the first optical multiplexer / demultiplexer by the head-end optical module is abnormal; in the case that the optical power of the fourth optical signal is abnormal, it is determined that the head-end optical module or the link between the head-end optical module and the first optical multiplexer / demultiplexer is faulty; in the case that the optical power of the fourth optical signal is normal, it is determined that the head-end device is faulty.

[0013] Based on the possible implementation, in the case that it is determined that the received optical power of the head-end optical module is normal, the power of the third optical signal output to the first serial communication interface by the first optical multiplexer / demultiplexer, the power of the fourth optical signal output to the first optical multiplexer / demultiplexer by the head-end optical module, and the optical power of the fourth optical signal are detected in sequence to determine the specific position of the fault.

[0014] In another possible implementation, in the case that the optical power of the third optical signal is normal, it is detected whether the OTDR system sends an alarm information; in the case that the OTDR system does not send the alarm information, it is determined that the tail-end optical module or the link between the tail-end optical module and the tail-end device is faulty; in the case that the OTDR system sends the alarm information, according to the alarm information, it is determined that the first serial communication interface, the second serial communication interface or the optical fiber link is faulty.

[0015] Based on the possible implementation, in the case that the optical power of the third optical signal is normal, the position of the fault is determined by judging whether the OTDR system sends an alarm information.

[0016] In another possible implementation, according to the alarm information, it is determined that the first serial communication interface, the second serial communication interface or the optical fiber link has a fault, comprising:

[0017] If the alarm information is used to indicate a near-end abnormality or interruption, it is determined that the first serial communication interface has a fault;

[0018] If the alarm information is used to indicate a far-end abnormality or interruption, it is determined that the second serial communication interface has a fault;

[0019] If the alarm information is used to indicate an optical fiber link abnormality or interruption, it is determined that the optical fiber link has a fault.

[0020] Based on the possible implementation, according to the content indicated by the alarm information, it is determined that the fault position of the optical fiber link is the first serial communication interface, the second serial communication interface or the optical fiber link.

[0021] In another possible implementation, after the service has an abnormality, it is detected whether the received optical power of the tail-end optical module is abnormal;

[0022] In the case that the received optical power of the tail-end optical module is abnormal, it is detected whether the power of the fourth optical signal output by the head-end optical module to the first optical multiplexer / demultiplexer is abnormal;

[0023] In the case that the optical power of the fourth optical signal is abnormal, it is determined that the head-end optical module or the link between the head-end optical module and the first optical multiplexer / demultiplexer has a fault;

[0024] In the case that the optical power of the fourth optical signal is normal, it is detected whether the power of the third optical signal output by the first optical multiplexer / demultiplexer to the first serial communication interface is abnormal;

[0025] In the case that the optical power of the third optical signal is abnormal, it is determined that the head-end optical module or the head-end device has a fault;

[0026] In the case that the optical power of the third optical signal is normal, it is detected whether the OTDR system sends an alarm information;

[0027] In the case that the OTDR system does not send an alarm information, it is determined that the link between the tail-end optical module and the tail-end device has a fault;

[0028] In the case that the OTDR system sends an alarm information, according to the alarm information, it is determined that the first serial communication interface, the second serial communication interface or the optical fiber link has a fault.

[0029] Based on this possible implementation, after a service anomaly occurs, and in the case of abnormal received optical power of the tail-end optical module, the location of the fault can be determined by detecting the power of the fourth optical signal output from the head-end optical module to the first optical multiplexer / demultiplexer, the power of the third optical signal output from the first optical multiplexer / demultiplexer to the first serial communication interface, and whether the OTDR system issues an alarm message.

[0030] Secondly, a fault location device is provided, applied to a semi-active wavelength division multiplexing (WDM) system. The semi-active WDM system includes a headend optical module, a headend device, an optical fiber link, a tailend device, and a tailend optical module connected sequentially. The headend device includes a first optical multiplexer / demultiplexer and a first serial communication interface, and the tailend device includes a second serial communication interface and a second optical multiplexer / demultiplexer. The device includes:

[0031] The detection module is used to detect whether the received optical power of the head-end optical module is abnormal after a service anomaly occurs.

[0032] The detection module is also used to detect whether the optical power of the first optical signal output from the first optical multiplexer to the head-end optical module is abnormal when the received optical power of the head-end optical module is abnormal.

[0033] The detection module is also used to detect whether the optical power of the second optical signal output from the first serial communication interface to the first optical multiplexer / demultiplexer is abnormal when the optical power of the first optical signal is abnormal.

[0034] The determination module is used to determine if the head-end equipment has malfunctioned when the optical power of the second optical signal is normal.

[0035] In one possible implementation, the detection module is also used to detect whether the OTDR system issues an alarm message in the event of an abnormal optical power of the second optical signal.

[0036] The detection module is also used to determine whether the tail-end optical module or the link between the tail-end optical module and the tail-end device has failed, even if the OTDR system does not issue an alarm message.

[0037] The determination module is also used to determine, based on the alarm information, whether the first serial communication interface, the second serial communication interface, or the fiber optic link has failed when the OTDR system issues an alarm.

[0038] In another possible implementation, the detection module is also used to detect whether the power of the third optical signal output from the first optical multiplexer to the first serial communication interface is abnormal, provided that the received optical power of the head-end optical module is normal.

[0039] The detection module is also used to detect whether the power of the fourth optical signal output from the head-end optical module to the first optical multiplexer / demultiplexer is abnormal when the optical power of the third optical signal is abnormal.

[0040] The determination module is also used to determine whether the head-end optical module or the link between the head-end optical module and the first optical multiplexer / demultiplexer has failed in the event of an abnormal optical power of the fourth optical signal.

[0041] The determination module is also used to determine if the head-end equipment has malfunctioned when the optical power of the fourth optical signal is normal.

[0042] In another possible implementation, the detection module is also used to detect whether the OTDR system issues an alarm message when the optical power of the third optical signal is normal.

[0043] The determination module is also used to determine whether the tail optical module or the link between the tail optical module and the tail device has failed, even if the OTDR system does not issue an alarm message.

[0044] The determination module is also used to determine, based on the alarm information, whether the first serial communication interface, the second serial communication interface, or the fiber optic link has failed when the OTDR system issues an alarm.

[0045] In another possible implementation, a module is defined, specifically for:

[0046] If the alarm message is used to indicate a near-end abnormality or interruption, it indicates that the first serial communication interface has failed.

[0047] If the alarm message is used to indicate a remote abnormality or interruption, it indicates that the second serial communication interface has failed.

[0048] If the alarm message indicates an abnormality or interruption in the fiber optic link, it confirms that a fault has occurred in the fiber optic link.

[0049] In another possible implementation, the detection module is also used to detect whether the received optical power of the tail optical module is abnormal after a service anomaly occurs.

[0050] The detection module is also used to detect whether the power of the fourth optical signal output from the head-end optical module to the first optical multiplexer / demultiplexer is abnormal when the received optical power of the tail-end optical module is abnormal.

[0051] The determination module is also used to determine whether the head-end optical module or the link between the head-end optical module and the first optical multiplexer / demultiplexer has failed in the event of an abnormal optical power of the fourth optical signal.

[0052] The detection module is also used to detect whether the power of the third optical signal output from the first optical multiplexer to the first serial communication interface is abnormal when the optical power of the fourth optical signal is normal.

[0053] The determination module is also used to determine whether the head-end optical module or head-end equipment has malfunctioned in the event of abnormal optical power of the third optical signal.

[0054] The detection module is also used to detect whether the OTDR system issues an alarm message when the optical power of the third optical signal is normal.

[0055] The determination module is also used to determine that a link failure has occurred between the tail optical module and the tail device when the OTDR system does not issue an alarm message;

[0056] The determination module is also used to determine, based on the alarm information, whether the first serial communication interface, the second serial communication interface, or the fiber optic link has failed when the OTDR system issues an alarm.

[0057] Thirdly, an electronic device is provided, comprising: a processor and a memory for storing processor-executable instructions; wherein the processor is configured to perform a fault location method as described in the first aspect and any possible implementation thereof.

[0058] Fourthly, a computer-readable storage medium is provided, on which computer instructions are stored, which, when executed on an electronic device, cause the electronic device to perform a fault location method as described in the first aspect and any possible implementation thereof.

[0059] For a detailed description of the second to fourth aspects and their various implementations in this invention, please refer to the detailed description in the first aspect and its various implementations. The beneficial effects of the second to fourth aspects and their various implementations can be found in the analysis of the beneficial effects of the first aspect and its various implementations, and will not be repeated here. Attached Figure Description

[0060] Figure 1 A schematic diagram of the architecture of an existing semi-active type II WDM system provided in an embodiment of the present invention;

[0061] Figure 2 This is a schematic diagram of the structure of a semi-active wavelength division multiplexing system provided in an embodiment of the present invention;

[0062] Figure 3 A schematic diagram of an improved tail-end device for a semi-active WDM system provided in an embodiment of the present invention;

[0063] Figure 4A schematic diagram of an OTDR system structure provided in an embodiment of the present invention;

[0064] Figure 5 A flowchart of a fault location method provided in an embodiment of the present invention Figure 1 ;

[0065] Figure 6 A flowchart of a fault location method provided in an embodiment of the present invention Figure 2 ;

[0066] Figure 7 A flowchart of a fault location method provided in an embodiment of the present invention Figure 3 ;

[0067] Figure 8 This is a schematic diagram of the structure of a fault location device provided in an embodiment of the present invention;

[0068] Figure 9 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0069] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0070] It should be noted that in this invention, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0071] Currently, semi-active WDM is mostly used in 4G / 5G fronthaul, connecting wireless DU / BBU equipment and RRU / AAU equipment. Depending on the optical module configuration and monitoring and management architecture of the headend equipment, its equipment type can be divided into semi-active Type I and semi-active Type II. Due to its lower equipment cost, semi-active Type II equipment is currently more commonly used in existing networks.

[0072] For example, Figure 1 An existing semi-active type II WDM system architecture diagram is provided. For example... Figure 1As shown, existing semi-active type II WDM systems mainly include headend optical modules, headend equipment, fiber optic links, tailend equipment, and tailend optical modules. The headend equipment is equipped with a first optical multiplexer / demultiplexer and a monitoring board, but no optical modules are configured. Both the headend and tailend optical modules are installed on the service equipment. The monitoring board splits a portion of each optical signal through the link and leads it to a photodetector (PD) to obtain the data required for monitoring and management. The tailend equipment is a passive second optical multiplexer / demultiplexer. The fiber optic link between the headend and tailend equipment is single-fiber bidirectional. The first optical multiplexer / demultiplexer is generally of dielectric thin-film (TFF) type. This invention mainly addresses the improvement of semi-active type II WDM systems, hereinafter referred to as semi-active WDM.

[0073] The OAM (Optical Animation and Modulation) function of semi-active WDM equipment is currently mainly implemented through link splitting, which is divided into two types: optical power monitoring and optical power monitoring + optical module tuning. The former can monitor the input optical power of the splitting link; the latter, in addition to monitoring the input optical power of the splitting link, can also extract information such as received optical power, transmitted optical power, bias current, voltage, housing temperature, laser temperature, and TEC current during optical module tuning. When tuning information emitted by the optical module cannot be detected, an optical module dislocation alarm can be issued.

[0074] While current semi-active WDM systems can achieve some OAM capabilities through optical power monitoring or a combination of optical power monitoring and optical module adjustment, and the network management system can issue corresponding alarms when a fault occurs, they lack the ability to automatically locate the specific location of the fault. Troubleshooting still requires traditional manual methods, which are time-consuming, labor-intensive, inefficient, costly, and demand high levels of skill and experience from the personnel. Specifically:

[0075] (1) A fault in one part of the system may cause multiple alarms, and faults in multiple parts may cause the same alarm. The network management system cannot directly determine the location of the fault. Therefore, the current troubleshooting process is generally as follows: when a system fault occurs, the staff first manually analyzes the alarms to deduce which parts the fault may be located in, and then gradually determines the exact location of the fault through on-site testing, on-site equipment replacement experiments, and other methods. The whole process is time-consuming, labor-intensive, inefficient, and costly, requiring the staff to be familiar with the existing network and have rich troubleshooting experience.

[0076] (2) When the light receiving power of the tail-end optical module is too low or there is no light receiving, the current head-end equipment structure cannot distinguish whether the fault is the head-end optical module (light emission wavelength fault), the head-end equipment or the tail-end jumper.

[0077] (3) The current tail-end equipment structure cannot be used to detect whether the tail-end equipment is faulty using an optical time domain reflectometer (OTDR) system.

[0078] To address the above issues, this invention modifies the structure of the headend and tailend devices of the semi-active WDM system and adopts an automatic fault location algorithm to achieve automatic fault location. When a fault occurs, the network management system can automatically and accurately determine the specific location of the fault in the semi-active system and push it to the maintenance personnel, saving troubleshooting time and costs and reducing the skill and experience requirements for troubleshooting personnel.

[0079] For example, Figure 2 This invention provides a schematic diagram of a semi-active wavelength division multiplexing system. (See attached diagram.) Figure 2 As shown, the system includes: a head-end optical module 11, a head-end device 12, an optical fiber link 13, a tail-end device 14, and a tail-end optical module 15 connected in sequence.

[0080] The head-end equipment 12 includes: a first optical multiplexer / demultiplexer 121, a first optical splitter 122, a first serial communication interface 124, and a monitoring board 125.

[0081] The first end of the first optical multiplexer / demultiplexer 121 is connected to the headend optical module 11 via a headend jumper.

[0082] The first end of the first serial communication interface 124 is connected to the optical fiber link 13.

[0083] The first end of the first optical splitter 122 is connected to the second end of the first optical multiplexer / demultiplexer 121, the second end of the first optical splitter 122 is connected to the second end of the first serial communication interface 124, and the third end of the first optical splitter 122 is connected to the monitoring board 125. The first optical splitter 122 is used to split the optical signal output from the second end of the first optical multiplexer / demultiplexer 121, outputting a part of the optical signal to the first serial communication interface 124 and the other part of the optical signal to the monitoring board 125.

[0084] The monitoring board 125 is used to detect the optical power of the optical signal output from the second end of the first optical multiplexer / demultiplexer.

[0085] In some embodiments, the head-end device further includes a second beam splitter 123 connected in series between the first beam splitter 122 and the first serial communication interface 124.

[0086] The first end of the second beam splitter 123 is connected to the second end of the first beam splitter 122. The second end of the second beam splitter 123 is connected to the second end of the first serial communication interface 124. The third end of the second beam splitter 123 is connected to the monitoring board 125. The second beam splitter 123 is used to split the optical signal output from the second end of the first serial communication interface 124, outputting a portion of the optical signal to the first beam splitter 122 and the other portion of the optical signal to the monitoring board 125.

[0087] The monitoring board 125 is also used to detect the optical power of the optical signal output from the second end of the first serial communication interface 124.

[0088] In some embodiments, the first end of the first optical multiplexer / demultiplexer 121 includes a first transmitting interface, and the headend optical module 11 includes a second receiving interface.

[0089] The head-end device 12 also includes a third beam splitter 1262.

[0090] The first end of the third optical splitter 1262 is connected to the first transmitting interface, the second end of the third optical splitter 1262 is connected to the second receiving interface, and the third end of the third optical splitter 1262 is connected to the monitoring board 125. The third optical splitter 1262 is used to split the optical signal output from the first transmitting interface, outputting a portion of the optical signal to the second receiving interface and the other portion of the optical signal to the monitoring board 125.

[0091] The monitoring board 125 is also used to detect the optical power of the optical signal output from the first transmitting interface.

[0092] In some embodiments, the first end of the first optical multiplexer / demultiplexer 121 includes a first receiving interface, and the headend optical module 11 includes a second transmitting interface.

[0093] The head-end equipment also includes a fourth beam splitter 1261.

[0094] The first end of the fourth optical splitter 1261 is connected to the first receiving interface, the second end of the fourth optical splitter 1261 is connected to the second transmitting interface, and the third end of the fourth optical splitter 1261 is connected to the monitoring board 125. The fourth optical splitter 1261 is used to split the optical signal output from the second transmitting interface, outputting a part of the optical signal to the first receiving interface and the other part of the optical signal to the monitoring board 125.

[0095] The monitoring board 125 is also used to detect the optical power of the optical signal output from the second transmitting interface.

[0096] In some embodiments, the tail device 14 includes a second serial communication interface 1411 and a second optical multiplexer / demultiplexer 1412.

[0097] The first end of the second serial communication interface 1411 is connected to the optical fiber link 13, the second end of the second serial communication interface 1411 is connected to the first end of the second optical multiplexer / demultiplexer 1412, and the second port of the second optical multiplexer / demultiplexer 1412 is connected to the tail optical module 15 through the tail jumper.

[0098] In some embodiments, Figure 3 (1) provides a schematic diagram of the original structure of the tail-end device. Figure 3 (2) provides a schematic diagram of the improved tail-end device. For example... Figure 3 As shown, the improved structure of the tail device also includes a coiled optical fiber 1413 connected to the second optical multiplexer / demultiplexer 1412. The coiled optical fiber 1413 is used to terminate the remaining wavelength of light after multiplexing / demultiplexing by the second optical multiplexer / demultiplexer 1412.

[0099] In some embodiments, the end face of the coiled optical fiber 1413 is polished by physical contact (PC) method.

[0100] Among them, PC grinding involves grinding the end face of the coiled fiber 1413 into a slightly spherical surface, so that the core of the coiled fiber 1413 is located at the highest point of the bend. In this way, the end face of the coiled fiber 1413 can make physical contact with the end faces of other fibers, which can effectively reduce the air gap between fiber optic components.

[0101] For example, continue to refer to Figure 2 As shown, taking a 6-wavelength, 3-channel system as an example, this semi-active WDM system includes three head-end optical modules (i.e., λ4, λ5, λ6) and three tail-end optical modules (i.e., λ1, λ2, λ3). Optical splitters are installed on the link between the first optical multiplexer / demultiplexer and the first serial communication interface, and on each head-end jumper, to split the optical power to the monitoring board's PD.com receiver, PD.com transmitter, and PD.1~n for optical power monitoring and extraction of optical module tuning information.

[0102] Specifically, PD.com (Receive) is used to detect the optical power of the second optical signal output from the first serial communication interface to the first optical multiplexer / demultiplexer. PD.com (Transmit) is used to detect the power of the third optical signal output from the first optical multiplexer / demultiplexer to the first serial communication interface. PD.1, PD.2, and PD.3 are used to detect the optical power of the first optical signal output from the first optical multiplexer to the headend optical module through headend jumpers 1, 2, and 3, respectively. PD.4, PD.5, and PD.6 are used to monitor the power of the fourth optical signal output from the headend optical module to the first optical multiplexer / demultiplexer through headend jumpers 4, 5, and 6, respectively.

[0103] In some embodiments, Figure 4A schematic diagram of an OTDR system architecture is provided. For example... Figure 4 As shown, the remaining wavelength optical path after optical multiplexing / demultiplexing 121 of the head-end device is led out as the OTDR online monitoring port 127 for OTDR online testing.

[0104] In some embodiments, the OTDR online monitoring port 127 is connected to the OTDR system 128.

[0105] In some embodiments, the OTDR system detects optical pulses as follows: the optical pulses sent by the OTDR system are reflected sequentially by TFF filters of each wavelength in the first optical multiplexer / demultiplexer, then transmitted to the fiber optic link through the first serial communication interface, and then enter the tail device through the second serial communication interface. After being reflected by TFF filters of each wavelength in the second optical multiplexer / demultiplexer, they enter the pigtail. Therefore, its fault monitoring range includes the first optical multiplexer / demultiplexer, the fiber optic link, and the second optical multiplexer / demultiplexer.

[0106] Under normal circumstances, the reflection events in an OTDR test are as follows:

[0107] First reflected event: OTDR online monitoring port.

[0108] Second reflection event: First serial communication interface.

[0109] Intermediate reflection events: Intermediate live joints or jumper points in the fiber optic link, which may be multiple.

[0110] The second-to-last reflection event: the second serial communication interface.

[0111] The penultimate reflection event: coiled fiber end.

[0112] Fault diagnosis and location methods:

[0113] 1) The event loss of the first and second reflection events increases, or the number of non-reflection events in between increases: the first optical multiplexer / demultiplexer is damaged and the insertion loss increases.

[0114] 2) Interruption after the first reflection event or at the second reflection event: Optical path interruption inside the first optical multiplexer / demultiplexer or at the first serial communication interface.

[0115] 3) An increase in reflection and non-reflection events occurs between the second reflection event and the penultimate reflection event, with increased loss in between: A fault point appears in the middle of the fiber optic link. The location of the newly added event or the location of the original event with increased loss is the location of the fault point.

[0116] 4) The number of reflection and non-reflection events in the fiber optic link changes after the second reflection event, or the length of the fiber optic link decreases beyond the length of the fiber optic cable coiled at the tail end: the fiber optic link is interrupted.

[0117] 5) The event loss of the second-to-last reflection event increases, and the number of non-reflection events between the penultimate and penultimate reflection events increases: the second optical multiplexer / demultiplexer is damaged, and the insertion loss increases.

[0118] 6) The fiber optic link length is reduced but does not exceed the length of the fiber optic cable coiled at the tail end device, or the penultimate or penultimate reflection event disappears: the optical path is interrupted inside the second optical multiplexer / demultiplexer or at the second serial communication interface.

[0119] Continue to refer to Figure 2 The network management system monitors the changes in optical power and system link attenuation at locations such as PD.1 to PD.6, PD.com receiver, and PD.com transmitter in real time through periodic queries or periodic reports from active devices at the headend. When abnormal changes occur, the system automatically sends alarm information to the network management system. The network management system then performs root cause analysis of the alarm according to this method to determine the specific location of the fault.

[0120] The relevant abnormal alarm definitions are as follows:

[0121] 1) PD.n optical power too low: The optical power monitored by PD.n is lower than the threshold value. The PD.n optical power threshold value corresponding to the transmitting port of the head-end optical module can be uniformly set to the minimum transmitting optical power of the optical module specified in the standard, or it can be user-defined; the PD.n optical power threshold value corresponding to the receiving port of the head-end optical module can be uniformly set to the receiving sensitivity of the optical module specified in the standard, or it can be user-defined.

[0122] 2) PD.n optical power loss: PD.n cannot detect optical power.

[0123] 3) The optical power received by PD.com has dropped too much: The optical power received by PD.com this time has dropped more than the optical power received last time than the threshold value. This threshold value can be set to 1dB or customized.

[0124] 4) Loss of optical power received by PD.com: PD.com cannot detect optical power.

[0125] 5) PD.com luminous power drop is too large: The luminous power detected by PD.com this time has dropped more than the luminous power detected last time than the threshold value. This threshold value can be set to 1dB or customized.

[0126] 6) PD.com light power loss: PD.com cannot detect light power.

[0127] 7) OTDR near-end anomaly alarm: The OTDR system detects that the event loss of the first and second reflection events has increased, or that the number of non-reflection events in between has increased.

[0128] 8) OTDR near-end interruption alarm: The OTDR system is interrupted after detecting the first reflection event or at the second reflection event.

[0129] 9) OTDR optical cable abnormality alarm: The OTDR system detects an increase in reflection and non-reflection events between the second reflection event and the penultimate reflection event, with increased loss in between.

[0130] 10) OTDR fiber optic cable interruption alarm: The OTDR system detects that the number of reflection events and non-reflection events in the fiber optic link changes after the second reflection event, and the fiber optic link length decreases beyond the length of fiber optic cable coiled at the tail end device.

[0131] 11) OTDR tail-end abnormal alarm: The OTDR system detects that the event loss of the second-to-last reflection event is increasing, and the number of non-reflection events between the penultimate and penultimate reflection events is increasing.

[0132] 12) OTDR tail-end interruption alarm: The OTDR system detects that the fiber link length has decreased by no more than the length of the fiber coiled at the tail-end device, or the last or second-to-last reflection event has disappeared.

[0133] 13) Low received optical power of headend optical module λn: The received optical power of headend optical module λn is below a threshold value. The received optical power of optical module λn can be obtained from the tuning information of optical module λn or pushed by the headend service equipment. The received optical power threshold value can be uniformly set to the standard optical module receiving sensitivity or can be user-defined.

[0134] 14) Loss of received optical power in headend optical module λn: The headend optical module λn cannot receive optical signals. The received optical power of optical module λn can be obtained from the tuning information of optical module λn or pushed by the headend service equipment.

[0135] 15) Low transmit optical power of headend optical module λn: The transmit optical power of headend optical module λn is lower than the threshold value. The transmit optical power of optical module λn is obtained from the tuning information of optical module λn. The transmit optical power threshold value can be uniformly set to the minimum transmit optical power specified by the standard for optical modules, or it can be user-defined.

[0136] 16) Head-end optical module λn dislodged: PD.n cannot detect the top adjustment information of the head-end optical module λn.

[0137] 17) Headend Optical Module λn Abnormal Alarm: The optical module λn's previous emission power, bias current, voltage, housing temperature, laser temperature, TEC current, etc., exceeded the maximum or minimum threshold values. The previous emission power, bias current, voltage, housing temperature, laser temperature, TEC current, etc., are obtained from the optical module's previous periodic push of top-level adjustment information or the previous queried top-level adjustment information, and are recorded in the network management server. The maximum and minimum emission power thresholds can be uniformly set to the standard maximum and minimum transmit optical power specified for optical modules, or they can be user-defined; the bias current, voltage, housing temperature, laser temperature, and TEC current can be set according to the optical module's factory specifications.

[0138] 18) Low received optical power of tail-end optical module λn: The received optical power of tail-end optical module λn is below the threshold value. The received optical power of optical module λn can be obtained from the tuning information of optical module λn. The received optical power threshold value can be uniformly set to the standard optical module receiving sensitivity, or it can be user-defined.

[0139] 19) Loss of received optical power in tail-end optical module λn: The tail-end optical module λn cannot receive optical signals. The received optical power of optical module λn can be obtained from the tuning information of optical module λn.

[0140] 20) Low transmit optical power of tail-end optical module λn: The transmit optical power of tail-end optical module λn is lower than the threshold value. The transmit optical power of optical module λn is obtained from the tuning information of optical module λn. The transmit optical power threshold value can be uniformly set to the minimum transmit optical power specified by the standard for optical modules, or it can be user-defined.

[0141] 21) Tail-end optical module λn dislodged: PD.n cannot detect the top adjustment information of tail-end optical module λn.

[0142] 22) Tail-end optical module λn abnormal alarm: The previous emission power, bias current, voltage, housing temperature, laser temperature, TEC current, etc. of optical module λn exceeded the maximum or minimum threshold values. The previous emission power, bias current, voltage, housing temperature, laser temperature, TEC current, etc. are obtained from the optical module tuning information pushed periodically by optical module λn in the last periodic ...

[0143] Based on this, the semi-active wavelength division multiplexing system provided by the present invention can automatically locate the specific location of the fault when the system fails, without requiring maintenance personnel to spend a lot of time analyzing the possible location of the fault or to spend a lot of effort on on-site testing, thus greatly saving troubleshooting time and costs.

[0144] Understandable, Figure 2 To facilitate pinpointing the exact location of the fault, the system is divided into seven sections horizontally based on the equipment composition of the semi-active WDM system. Vertically, the specific fault location is determined based on the channel number of the semi-active WDM system and the distance to the optical cable fault. The specific definitions of possible fault locations are as follows:

[0145] 1)In: Headend optical module with channel number n, without optical interface.

[0146] 2) II.n: Optical jumper cable corresponding to the transmission direction of the optical module with channel number n at the head end, from the head end device to the head end optical module, including the optical interfaces on both sides.

[0147] 3)III: First optical multiplexer / demultiplexer, including the COM optical interface of the headend device.

[0148] 4) IV.k: k meters of the fiber optic link between the headend and tailend devices, excluding the COM optical interfaces of the headend and tailend devices.

[0149] 5)V: Second optical multiplexer / demultiplexer, including the COM optical interface of the tail device.

[0150] 6) VI.n: Optical jumper cable corresponding to the transmission direction of the optical module with channel number n at the tail end, from the tail end device to the tail end optical module, including the optical interfaces on both sides.

[0151] 7)VII.n: Tail-end optical module with channel number n, without optical interface.

[0152] Let the total number of channels in the semi-active WDM system be m. The wavelength numbers are arranged in the order of the tail-end optical modules followed by the head-end optical modules, i.e., the wavelength numbers of the tail-end optical modules are 1, 2...m / 2, and the wavelength numbers of the head-end optical modules are m / 2+1, m / 2+2...m. When the wavelength number of the tail-end optical module is n, the wavelength number of the corresponding head-end optical module in the same channel is n+m / 2; when the wavelength number of the head-end optical module is n, the wavelength number of the corresponding tail-end optical module in the same channel is nm / 2.

[0153] like Figure 5 As shown, the flowchart of a fault location method provided by an embodiment of the present invention is as follows. Figure 1 , applied to Figure 2 The semi-active WDM system shown includes the following steps:

[0154] S101. After a service anomaly occurs, check whether the received optical power of the head-end optical module is abnormal.

[0155] In some embodiments, if a business process fails to proceed as scheduled or the final result of the business does not meet expectations, it is determined that the business has encountered an anomaly.

[0156] In some embodiments, after a service anomaly occurs, the service equipment determines the number of the abnormal head-end device and the wavelength number of the head-end optical module; based on the head-end device number and the wavelength number of the head-end optical module, the corresponding head-end optical module is located; and the received optical power of the head-end optical module is checked for abnormality.

[0157] In some embodiments, the received optical power of the head-end optical module is monitored using optical module tuning information. When the received optical power of the head-end optical module is outside a preset range, the head-end optical module is determined to be malfunctioning. The tuning information is a frequency identifier attached to the optical signal. Based on this frequency identifier, wavelength tracking of the optical signal can be achieved, and the received optical power of the head-end optical module can be monitored. This improves the efficiency of detecting the received optical power of the head-end optical module.

[0158] S102. In the event of abnormal received optical power of the head-end optical module, detect whether the optical power of the first optical signal output from the first optical multiplexer / demultiplexer to the head-end optical module is abnormal.

[0159] In some embodiments, when the received optical power of the head-end optical module is abnormal, the optical power of the first optical signal output from the first optical multiplexer to the head-end optical module is determined to be abnormal based on the monitoring information of the monitoring board.

[0160] In some embodiments, the monitoring information of the monitoring board includes at least one of the following: the optical power of the first optical signal output from the first optical multiplexer / demultiplexer to the headend optical module, the optical power of the second optical signal output from the first serial communication interface to the first optical multiplexer / demultiplexer, the power of the third optical signal output from the first optical multiplexer / demultiplexer to the first serial communication interface, and the power of the fourth optical signal output from the headend optical module to the first optical multiplexer / demultiplexer.

[0161] In some embodiments, if the optical power of the first optical signal is less than a first preset power, the optical power of the first optical signal is determined to be abnormal. If the optical power of the first optical signal is greater than or equal to the first preset power, the optical power of the first optical signal is determined to be normal.

[0162] S103. In the event of an abnormal optical power of the first optical signal, detect whether the optical power of the second optical signal output from the first serial communication interface to the first optical multiplexer / demultiplexer is abnormal.

[0163] In some embodiments, the optical power of the second optical signal output from the first serial communication interface to the first optical multiplexer / demultiplexer is determined to be abnormal based on the monitoring information from the monitoring board.

[0164] In some embodiments, if the optical power of the second optical signal is less than a second preset power, the optical power of the second optical signal is determined to be abnormal. If the optical power of the second optical signal is greater than or equal to the second preset power, the optical power of the second optical signal is determined to be normal.

[0165] S104. If the optical power of the second optical signal is normal, determine that the head-end equipment has malfunctioned.

[0166] For example, continue to refer to Figure 2 Let the total number of channels in the semi-active WDM system be m, and the wavelength number where the service anomaly occurs be n. Check if the received optical power of the headend optical module λn providing wavelength number n is abnormal. If the received optical power of the headend optical module λn is abnormal, then check the optical power of the first optical signal monitored by PD.(nm / 2). If the optical power of the first optical signal is abnormal, then check if the optical power of the second optical signal monitored by PD.com is abnormal. If the optical power of the second optical signal is normal, then it is determined that the first optical multiplexer / demultiplexer in headend equipment III has failed.

[0167] Based on this, after a service anomaly occurs, the received optical power of the head-end optical module, the optical power of the first optical signal output from the first optical multiplexer to the head-end optical module, and the optical power of the second optical signal output from the first serial communication interface to the first optical multiplexer are monitored sequentially to accurately determine the specific location of the fault in the system that caused the service anomaly.

[0168] In some embodiments, Figure 6 A flowchart of a fault location method provided in an embodiment of the present invention Figure 2 ,like Figure 6 As shown, the method includes the following steps:

[0169] S101. After a service anomaly occurs, check whether the received optical power of the head-end optical module is abnormal.

[0170] S102. In the event of abnormal received optical power of the head-end optical module, detect whether the optical power of the first optical signal output from the first optical multiplexer / demultiplexer to the head-end optical module is abnormal.

[0171] S103. In the event of an abnormal optical power of the first optical signal, detect whether the optical power of the second optical signal output from the first serial communication interface to the first optical multiplexer / demultiplexer is abnormal.

[0172] S1041. In the event of abnormal optical power of the second optical signal, detect whether the OTDR system issues an alarm message.

[0173] S1051. When the OTDR system issues an alarm message, determine, based on the alarm message, that the first serial communication interface, the second serial communication interface, or the fiber optic link has failed.

[0174] In some embodiments, when the OTDR system issues an alarm message, determining that the first serial communication interface, the second serial communication interface, or the fiber optic link has failed based on the alarm message includes: if the alarm message indicates a near-end abnormality or interruption, determining that the first serial communication interface has failed; if the alarm message indicates a far-end abnormality or interruption, determining that the second serial communication interface has failed; and if the alarm message indicates a fiber optic link abnormality or interruption, determining that the fiber optic link has failed.

[0175] S1052. If the OTDR system does not issue an alarm message, determine that the tail-end optical module or the link between the tail-end optical module and the tail-end device has failed.

[0176] For example, suppose the total number of channels in a semi-active WDM system is m, and the wavelength number where the service anomaly occurs is n. The system detects whether the received optical power of the headend optical module λn, which provides wavelength number n, is abnormal. If the received optical power of the headend optical module λn is detected to be abnormal, then the optical power of the first optical signal monitored by PD.(nm / 2) is detected. If the optical power of the first optical signal is abnormal, then the optical power of the second optical signal monitored by PD.com is detected to be abnormal.

[0177] In the event of abnormal optical power in the second optical signal, check if the OTDR system issues an alarm message. If the OTDR system does not issue an alarm message, check if the tail-end optical module λ (nm / 2) is dislodged. If the tail-end optical module λ (nm / 2) is not dislodged, check if the transmitted optical power of the tail-end optical module λ (nm / 2) is too low. If the transmitted optical power of the tail-end optical module λ (nm / 2) is normal, then position VI. (nm / 2) has failed. If the transmitted optical power of the tail-end optical module λ (nm / 2) is too low, then position VII. (nm / 2) has failed.

[0178] If the tail-end optical module λ (nm / 2) is dislodged, check if there is an abnormal alarm for the tail-end optical module λ (nm / 2). If there is no abnormal alarm for the tail-end optical module λ (nm / 2), then position VI. (nm / 2) is faulty or position VII. (nm / 2) has a wavelength misalignment. If there is an abnormal alarm for the tail-end optical module λ (nm / 2), then position VII. (nm / 2) is faulty.

[0179] In some embodiments, continue to refer to Figure 6 The fault location method includes the following steps:

[0180] S101. After a service anomaly occurs, check whether the received optical power of the head-end optical module is abnormal.

[0181] S102. In the event of abnormal received optical power of the head-end optical module, detect whether the optical power of the first optical signal output from the first optical multiplexer / demultiplexer to the head-end optical module is abnormal.

[0182] S113. If the optical power of the first optical signal is normal, determine that the head-end optical module or the link between the head-end optical module and the first optical multiplexer / demultiplexer has failed.

[0183] For example, continue to refer to Figure 2 Let the total number of channels in the semi-active WDM system be m, and the wavelength number of the optical module experiencing service anomalies be n. Detect whether the received optical power of the headend optical module λn providing wavelength number n is abnormal. If the received optical power of the headend optical module λn is detected to be abnormal, then detect the optical power of the first optical signal monitored by PD.(nm / 2). If the optical power of the first optical signal is normal, determine that either II.(nm / 2) or In has failed.

[0184] In some embodiments, continue to refer to Figure 6 The fault location method includes the following steps:

[0185] S101. After a service anomaly occurs, check whether the received optical power of the head-end optical module is abnormal.

[0186] S122. When the received optical power of the head-end optical module is normal, detect whether the power of the third optical signal output from the first optical multiplexer / demultiplexer to the first serial communication interface is abnormal.

[0187] In some embodiments, if the optical power of the third optical signal is less than a third preset power, the optical power of the third optical signal is determined to be abnormal. If the optical power of the third optical signal is greater than or equal to the third preset power, the optical power of the third optical signal is determined to be normal.

[0188] S123. In the event of abnormal optical power of the third optical signal, detect whether the power of the fourth optical signal output from the head-end optical module to the first optical multiplexer / demultiplexer is abnormal.

[0189] S1241. In the event of abnormal optical power of the fourth optical signal, determine that the head-end optical module or the link between the head-end optical module and the first optical multiplexer / demultiplexer has failed.

[0190] S1242. If the optical power of the fourth optical signal is normal, determine that the head-end equipment has malfunctioned.

[0191] In some embodiments, if the optical power of the fourth optical signal is less than a fourth preset power, the optical power of the fourth optical signal is determined to be abnormal. If the optical power of the fourth optical signal is greater than or equal to the fourth preset power, the optical power of the fourth optical signal is determined to be normal.

[0192] For example, continue to refer to Figure 2 Assume the total number of channels in the semi-active WDM system is m, and the wavelength number of the optical module experiencing service anomalies is n. Check if the received optical power of the headend optical module λn providing wavelength number n is abnormal. If the received optical power of the headend optical module λn is normal, check if the power of the third optical signal detected by PD.com is abnormal. If the power of the third optical signal is abnormal, check the power of the fourth optical signal output from the headend optical module to the first optical multiplexer / demultiplexer, monitored by PD.n. If the power of the fourth optical signal is abnormal, determine that the headend optical module In or the link II.n between the headend optical module and the first optical multiplexer / demultiplexer has failed. If the power of the fourth optical signal is normal, determine that the first optical multiplexer / demultiplexer in headend equipment III has failed.

[0193] In some embodiments, continue to refer to Figure 6 The fault location method includes the following steps:

[0194] S101. After a service anomaly occurs, check whether the received optical power of the head-end optical module is abnormal.

[0195] S122. When the received optical power of the head-end optical module is normal, detect whether the power of the third optical signal output from the first optical multiplexer / demultiplexer to the first serial communication interface is abnormal.

[0196] S131. If the optical power of the third optical signal is normal, check whether the OTDR system issues an alarm message.

[0197] S1051. When the OTDR system issues an alarm message, determine, based on the alarm message, that the first serial communication interface, the second serial communication interface, or the fiber optic link has failed.

[0198] S1052. If the OTDR system does not issue an alarm message, determine that the tail-end optical module or the link between the tail-end optical module and the tail-end device has failed.

[0199] In some embodiments, Figure 7 A flowchart of a fault location method provided in an embodiment of the present invention Figure 3 ,like Figure 7As shown, the fault location method includes the following steps:

[0200] S201. After a service anomaly occurs, check whether the received optical power of the tail-end optical module is abnormal.

[0201] S202. In the event of abnormal received optical power of the tail-end optical module, detect whether the power of the fourth optical signal output from the head-end optical module to the first optical multiplexer / demultiplexer is abnormal.

[0202] S2031. In the event of abnormal optical power of the fourth optical signal, determine that the head-end optical module or the link between the head-end optical module and the first optical multiplexer / demultiplexer has failed.

[0203] For example, continue to refer to Figure 2 After a service anomaly occurs, check whether the received optical power of the tail-end optical module λi is abnormal. If the received optical power of the tail-end optical module λi is abnormal, check whether the power of the fourth optical signal monitored on PD.(i+m / 2) is abnormal. If the optical power of the fourth optical signal is abnormal, determine that the head-end optical module or the link II.(i+m / 2) between the head-end optical module λ(i+m / 2) and the first optical multiplexer / demultiplexer has failed.

[0204] As a specific example, determining a fault in the headend optical module or the link II.(i+m / 2) between the headend optical module λ(i+m / 2) and the first optical multiplexer / demultiplexer when the optical power of the fourth optical signal is abnormal can be implemented as follows: When the optical power of the fourth optical signal is abnormal, check if the headend optical module λ(i+m / 2) is dislodged. If the headend optical module λ(i+m / 2) is not dislodged, check the transmitted optical power of the headend optical module λ(n+m / 2). If the transmitted optical power of the headend optical module λ(i+m / 2) is normal, determine the fault location II.(i+m / 2). If the transmitted optical power of the headend optical module λ(i+m / 2) is too low, determine the fault location I.(i+m / 2). If the headend optical module λ(i+m / 2) is dislodged, check if there are any abnormal alarms in the headend optical module λ(i+m / 2). If the headend optical module λ(i+m / 2) has no abnormal alarm, the fault location is determined to be II.(n+m / 2). If the headend optical module λ(i+m / 2) has an abnormal alarm, the fault location is determined to be I.(n+m / 2).

[0205] In some embodiments, continue to refer to Figure 7 The fault location method includes the following steps:

[0206] S201. After a service anomaly occurs, check whether the received optical power of the tail-end optical module is abnormal.

[0207] S202. In the event of abnormal received optical power of the tail-end optical module, detect whether the power of the fourth optical signal output from the head-end optical module to the first optical multiplexer / demultiplexer is abnormal.

[0208] S2032. When the optical power of the fourth optical signal is normal, detect whether the power of the third optical signal output from the first optical multiplexer to the first serial communication interface is abnormal.

[0209] S2041. Under the condition that the optical power of the third optical signal is normal, detect whether the OTDR system issues an alarm message.

[0210] S2042. In the event of abnormal optical power of the third optical signal, determine that the head-end optical module or head-end equipment has malfunctioned.

[0211] S1051. When the OTDR system issues an alarm message, determine, based on the alarm message, that the first serial communication interface, the second serial communication interface, or the fiber optic link has failed.

[0212] S1052. If the OTDR system does not issue an alarm message, determine that the link between the tail optical module and the tail device has failed.

[0213] For example, continue to refer to Figure 2 After a service anomaly occurs, check whether the received optical power of the tail optical module λi is abnormal.

[0214] In the event of abnormal received optical power of the tail-end optical module λi, the power of the fourth optical signal output from the head-end optical module to the first optical multiplexer / demultiplexer, as monitored by PD.(i+m / 2), is checked for abnormality.

[0215] If the optical power of the fourth optical signal is normal, check whether the power of the third optical signal output from the first optical multiplexer to the first serial communication interface, as detected by PD.com, is abnormal.

[0216] In the event of abnormal optical power in the third optical signal, check whether the online OTDR system issues an alarm message. If the OTDR system issues an alarm message indicating a near-end abnormality or interruption, then the optical multiplexing / demultiplexing equipment in III has malfunctioned. If the OTDR system does not issue an alarm message, then the wavelength of I.(i+m / 2) is misaligned.

[0217] If the optical power of the third optical signal is normal and the OTDR system issues an alarm message, the alarm message indicates that the first serial communication interface in III, the second serial communication interface in VI, or the fiber optic link in IV has failed.

[0218] Based on this, by monitoring the optical power of the optical signal on each link from the head-end optical module to the tail-end optical module in semi-active wavelength division multiplexing, and using the obtained data as the basis for determining the specific location of the fault in semi-active wavelength division multiplexing, the ability to automatically locate the specific location of the fault is realized, thereby improving the efficiency of fault location.

[0219] It is understood that the above method can be implemented by a network layout device. To achieve the above functions, the fault location device includes hardware structures or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein, the embodiments of the present invention can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of the present invention.

[0220] In this embodiment of the invention, the fault location device and the like can be divided into functional modules according to the above method examples. For example, each function can be divided into its own functional modules. The integrated modules can be implemented in hardware or as software functional modules. It should be noted that the module division in this embodiment of the invention is illustrative and only represents one logical functional division; in actual implementation, there may be other division methods.

[0221] When dividing each function into modules according to its corresponding function. Figure 8 A schematic diagram of the fault location device involved in the above embodiments is shown. Figure 8 As shown, the fault location device 80 includes a detection module 81 and a determination module 82.

[0222] The detection module 81 is used to detect whether the received optical power of the head-end optical module is abnormal after a service anomaly occurs.

[0223] The detection module 81 is also used to detect whether the optical power of the first optical signal output from the first optical multiplexer to the head-end optical module is abnormal when the received optical power of the head-end optical module is abnormal.

[0224] The detection module 81 is also used to detect whether the optical power of the second optical signal output from the first serial communication interface to the first optical multiplexer / demultiplexer is abnormal when the optical power of the first optical signal is abnormal.

[0225] The determination module 82 is used to determine if the head-end equipment has malfunctioned when the optical power of the second optical signal is normal.

[0226] In some embodiments, the detection module 81 is further configured to detect whether the OTDR system issues an alarm message in the event of an abnormal optical power of the second optical signal;

[0227] The detection module 81 is also used to determine, in the absence of an alarm message from the OTDR system, that a fault has occurred in the tail-end optical module or the link between the tail-end optical module and the tail-end device.

[0228] The determination module 82 is also used to determine, based on the alarm information, whether the first serial communication interface, the second serial communication interface, or the fiber optic link has failed when the OTDR system issues an alarm.

[0229] In some embodiments, the detection module 81 is further configured to detect whether the power of the third optical signal output from the first optical multiplexer to the first serial communication interface is abnormal when the received optical power of the head-end optical module is normal.

[0230] The detection module 81 is also used to detect whether the power of the fourth optical signal output from the head-end optical module to the first optical multiplexer / demultiplexer is abnormal when the optical power of the third optical signal is abnormal.

[0231] The determination module 82 is also used to determine, in the event of abnormal optical power of the fourth optical signal, that the head-end optical module or the link between the head-end optical module and the first optical multiplexer / demultiplexer has failed.

[0232] The determination module 82 is also used to determine if the head-end equipment has malfunctioned when the optical power of the fourth optical signal is normal.

[0233] In some embodiments, the detection module 81 is further configured to detect whether the OTDR system issues an alarm message when the optical power of the third optical signal is normal.

[0234] The determination module 82 is also used to determine that the tail optical module or the link between the tail optical module and the tail device has failed when the OTDR system does not issue an alarm message.

[0235] The determination module 82 is also used to determine, based on the alarm information, whether the first serial communication interface, the second serial communication interface, or the fiber optic link has failed when the OTDR system issues an alarm.

[0236] In some embodiments, the determining module 82 is specifically used for:

[0237] If the alarm message is used to indicate a near-end abnormality or interruption, it indicates that the first serial communication interface has failed.

[0238] If the alarm message is used to indicate a remote abnormality or interruption, it indicates that the second serial communication interface has failed.

[0239] If the alarm message indicates an abnormality or interruption in the fiber optic link, it confirms that a fault has occurred in the fiber optic link.

[0240] In some embodiments, the detection module 81 is further configured to detect whether the received optical power of the tail optical module is abnormal after a service anomaly occurs.

[0241] The detection module 81 is also used to detect whether the power of the fourth optical signal output from the head-end optical module to the first optical multiplexer / demultiplexer is abnormal when the received optical power of the tail-end optical module is abnormal.

[0242] The determination module 82 is also used to determine, in the event of abnormal optical power of the fourth optical signal, that the head-end optical module or the link between the head-end optical module and the first optical multiplexer / demultiplexer has failed.

[0243] The detection module 81 is also used to detect whether the power of the third optical signal output from the first optical multiplexer to the first serial communication interface is abnormal when the optical power of the fourth optical signal is normal.

[0244] The determination module 82 is also used to determine whether the head-end optical module or head-end equipment has malfunctioned in the event of abnormal optical power of the third optical signal.

[0245] The detection module 81 is also used to detect whether the OTDR system issues an alarm message when the optical power of the third optical signal is normal.

[0246] The determination module 82 is also used to determine that a link failure has occurred between the tail optical module and the tail device when the OTDR system does not issue an alarm message;

[0247] The determination module 82 is also used to determine, based on the alarm information, whether the first serial communication interface, the second serial communication interface, or the fiber optic link has failed when the OTDR system issues an alarm.

[0248] Thirdly, an electronic device is provided, comprising: a processor and a memory for storing processor-executable instructions; wherein the processor is configured to perform a fault location method as described in the first aspect and any possible implementation thereof.

[0249] Of course, the fault location device 80 includes, but is not limited to, the modules listed above. Furthermore, the specific functions that the above-mentioned functional modules can achieve include, but are not limited to, the functions corresponding to the method steps in the above examples. For detailed descriptions of other modules of the fault location device 80, please refer to the detailed descriptions of their corresponding method steps; these will not be repeated here in this embodiment of the invention.

[0250] When using integrated units, Figure 9A schematic diagram of a possible structure of the electronic device involved in the above embodiments is shown. The electronic device 900 may include a processor 901 and a memory 902. The memory 902 is used to store executable instructions of the processor 901. The processor 901 is configured to execute the instructions, causing the electronic device to perform various functions or steps in the above method embodiments.

[0251] Specifically, the processor 901 is used to control and manage the operation of the electronic device. The memory 902 is used to store the program code and data of the electronic device, such as fault location methods, preset weights, preset value ranges, etc.

[0252] The processor 901 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 901 may include an attached processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, memory, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural network processing unit (NPU).

[0253] The memory 902 may include one or more computer-readable storage media, which may be non-transitory. The memory 902 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory 902 is used to store at least one instruction, which is executed by the processor 901 to implement the fault location method provided in the embodiments of the present invention.

[0254] Some embodiments of this application provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer program instructions that, when executed on a computer, cause the computer to perform a fault location method as described in any of the above embodiments.

[0255] For example, the aforementioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical discs (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in this application may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0256] This application provides a computer program product containing instructions that, when run on a computer, cause the computer to execute any of the fault location methods described in the above embodiments.

[0257] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fault location method characterized by, The method is applied to a semi-active wavelength division multiplexing system, the semi-active wavelength division multiplexing system comprising a head-end optical module, a head-end device, an optical fiber link, a tail-end device, a tail-end optical module and an OTDR system connected in sequence, the head-end device comprising a first optical multiplexer / demultiplexer and a first serial communication interface, the tail-end device comprising a second serial communication interface and a second optical multiplexer / demultiplexer; the method comprising: after a service exception occurs, detecting whether the received optical power of the head-end optical module is abnormal; in the case that the received optical power of the head-end optical module is abnormal, detecting whether the optical power of a first optical signal output by the first optical multiplexer / demultiplexer to the head-end optical module is abnormal; in the case that the optical power of the first optical signal is abnormal, detecting whether the optical power of a second optical signal output by the first serial communication interface to the first optical multiplexer / demultiplexer is abnormal; in the case that the optical power of the second optical signal is normal, determining that the head-end device has a fault; in the case that the optical power of the second optical signal is abnormal, detecting whether the OTDR system sends an alarm information; in the case that the OTDR system does not send the alarm information, determining that the tail-end optical module or a link between the tail-end optical module and the tail-end device has a fault; in the case that the OTDR system sends the alarm information, according to the alarm information, determining that the first serial communication interface, the second serial communication interface or the optical fiber link has a fault; in the case that the received optical power of the head-end optical module is normal, detecting whether the optical power of a third optical signal output by the first optical multiplexer / demultiplexer to the first serial communication interface is abnormal; in the case that the optical power of the third optical signal is abnormal, detecting whether the optical power of a fourth optical signal output by the head-end optical module to the first optical multiplexer / demultiplexer is abnormal; in the case that the optical power of the fourth optical signal is abnormal, determining that the head-end optical module or a link between the head-end optical module and the first optical multiplexer / demultiplexer has a fault; in the case that the optical power of the fourth optical signal is normal, determining that the head-end device has a fault.

2. The method of claim 1, wherein, The method further comprises: in the case that the optical power of the third optical signal is normal, detecting whether the OTDR system sends an alarm information; in the case that the OTDR system does not send the alarm information, determining that the tail-end optical module or a link between the tail-end optical module and the tail-end device has a fault; in the case that the OTDR system sends the alarm information, according to the alarm information, determining that the first serial communication interface, the second serial communication interface or the optical fiber link has a fault.

3. The method according to claim 1 or 2, characterized in that, The determining that the first serial communication interface, the second serial communication interface or the optical fiber link has a fault according to the alarm information comprises: if the alarm information is used to indicate a near-end exception or interruption, determining that the first serial communication interface has a fault; if the alarm information is used to indicate a far-end exception or interruption, determining that the second serial communication interface has a fault; If the alarm information is used to indicate that the fiber link is abnormal or interrupted, it is determined that the fiber link is faulty.

4. The method of claim 1, wherein, The method further comprises: after the service is abnormal, detecting whether the received optical power of the tail-end optical module is abnormal; if the received optical power of the tail-end optical module is abnormal, detecting whether the power of the fourth optical signal output by the head-end optical module to the first optical multiplexer / demultiplexer is abnormal; if the optical power of the fourth optical signal is abnormal, determining that the head-end optical module or the link between the head-end optical module and the first optical multiplexer / demultiplexer is faulty; if the optical power of the fourth optical signal is normal, detecting whether the power of the third optical signal output by the first optical multiplexer / demultiplexer to the first serial communication interface is abnormal; if the optical power of the third optical signal is abnormal, determining that the head-end optical module or the head-end device is faulty; if the optical power of the third optical signal is normal, detecting whether the OTDR system sends alarm information; if the OTDR system does not send alarm information, determining that the link between the tail-end optical module and the tail-end device is faulty; if the OTDR system sends alarm information, according to the alarm information, determining that the first serial communication interface, the second serial communication interface or the fiber link is faulty.

5. A fault location device characterized by, The device is applied to a semi-active wavelength division multiplexing system, the semi-active wavelength division multiplexing system comprising a head-end optical module, a head-end device, a fiber link, a tail-end device, a tail-end optical module and an OTDR system connected in sequence, the head-end device comprising a first optical multiplexer / demultiplexer and a first serial communication interface, the tail-end device comprising a second serial communication interface and a second optical multiplexer / demultiplexer; the device comprises: a detection module, configured to detect, after the service is abnormal, whether the received optical power of the head-end optical module is abnormal; the detection module is further configured to, if the received optical power of the head-end optical module is abnormal, detect whether the optical power of the first optical signal output by the first optical multiplexer / demultiplexer to the head-end optical module is abnormal; the detection module is further configured to, if the optical power of the first optical signal is abnormal, detect whether the optical power of the second optical signal output by the first serial communication interface to the first optical multiplexer / demultiplexer is abnormal; a determination module, configured to, if the optical power of the second optical signal is normal, determine that the head-end device is faulty; the detection module is further configured to, if the optical power of the second optical signal is abnormal, detect whether the OTDR system sends alarm information; the detection module is further configured to, if the OTDR system does not send alarm information, determine that the tail-end optical module or the link between the tail-end optical module and the tail-end device is faulty; the determination module is further configured to, if the OTDR system sends alarm information, according to the alarm information, determine that the first serial communication interface, the second serial communication interface or the fiber link is faulty; The detection module is further configured to detect whether power of a third optical signal output by the first optical multiplexer / demultiplexer to the first serial communication interface is abnormal when the received optical power of the head-end optical module is normal. The detection module is further configured to detect whether power of a fourth optical signal output by the head-end optical module to the first optical multiplexer / demultiplexer is abnormal when the optical power of the third optical signal is abnormal. The determination module is further configured to determine that the head-end optical module or a link between the head-end optical module and the first optical multiplexer / demultiplexer is faulty when the optical power of the fourth optical signal is abnormal. The determination module is further configured to determine that the head-end device is faulty when the optical power of the fourth optical signal is normal.

6. The apparatus of claim 5, wherein The detection module is further configured to detect whether the OTDR system sends an alarm information when the optical power of the third optical signal is normal. The determination module is further configured to determine that the tail-end optical module or a link between the tail-end optical module and the tail-end device is faulty when the OTDR system does not send the alarm information. The determination module is further configured to determine, according to the alarm information, that the first serial communication interface, the second serial communication interface or the optical fiber link is faulty when the OTDR system sends the alarm information.

7. The apparatus of claim 5 or 6, wherein The determination module is specifically configured to: determine that the first serial communication interface is faulty if the alarm information indicates near-end abnormality or interruption; determine that the second serial communication interface is faulty if the alarm information indicates far-end abnormality or interruption; and determine that the optical fiber link is faulty if the alarm information indicates that the optical fiber link is abnormal or interrupted.

8. The apparatus of claim 5, wherein The detection module is further configured to detect whether received optical power of the tail-end optical module is abnormal after service abnormality occurs. The detection module is further configured to detect whether power of a fourth optical signal output by the head-end optical module to the first optical multiplexer / demultiplexer is abnormal when the received optical power of the tail-end optical module is abnormal. The determination module is further configured to determine that the head-end optical module or a link between the head-end optical module and the first optical multiplexer / demultiplexer is faulty when the optical power of the fourth optical signal is abnormal. The detection module is further configured to detect whether power of a third optical signal output by the first optical multiplexer / demultiplexer to the first serial communication interface is abnormal when the optical power of the fourth optical signal is normal. The determination module is further configured to determine that the head-end optical module or the head-end device is faulty when the optical power of the third optical signal is abnormal. The detection module is further configured to detect whether the OTDR system sends an alarm information when the optical power of the third optical signal is normal. The determining module is further configured to determine that a link between the optical module at the tail end and the device at the tail end is faulty when the OTDR system does not issue an alarm information. The determining module is further configured to determine, according to the alarm information, that the first serial communication interface, the second serial communication interface, or the optical fiber link is faulty when the OTDR system issues an alarm information.

9. An electronic device, comprising: The electronic device comprises a processor and a memory for storing instructions executable by the processor; The processor is configured to execute the instructions, so that the electronic device performs the fault locating method according to any one of claims 1-4.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions, and when the computer instructions run on the electronic device, the electronic device performs the fault locating method according to any one of claims 1-4.

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