Link fault detection device and method, storage medium and computer program product

Abstract

The invention provides a link fault detection device and method, a storage medium and a computer program product, the device comprises a first processing module and a second processing module, and the second processing module comprises a measurement signal transmitting module and a measurement signal receiving module; the measurement signal transmitting module is used for receiving the measurement signal sent by the first processing module and transmitting the measurement signal to the optical fiber; the measurement signal receiving module is used for receiving a reflected signal transmitted by the optical fiber based on the measurement signal and transmitting the reflected signal to the first processing module; and the first processing module is used for performing link fault detection based on the reflected signal.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a link failure detection device, method, storage medium and computer program product. Background Art

[0002] In the related art, when a fault occurs in the fronthaul link of a wireless network, the wireless network management will display a fronthaul link abnormality alarm. At this time, a handheld optical time domain reflectometer (OTDR) is used to detect the distance between the fault point and the computer room near the indoor baseband processing unit (Building Base band Unit, BBU) computer room, and then the fault point is inspected based on the distance. This detection method is time-consuming and has low network fault detection efficiency. Summary of the invention

[0003] In view of this, the present application hopes to provide a link fault detection device, method, storage medium and computer program product, which can improve the efficiency of network fault detection.

[0004] The technical solution of this application is implemented as follows:

[0005] In a first aspect, the present application provides a link failure detection device, the device comprising a first processing module and a second processing module, the second processing module comprising: a measurement signal transmitting module, a measurement signal receiving module;

[0006] A measurement signal transmitting module, used for receiving the measurement signal sent by the first processing module and transmitting the measurement signal to the optical fiber;

[0007] A measurement signal receiving module, used for receiving a reflection signal transmitted by the optical fiber based on the measurement signal, and transmitting the reflection signal to the first processing module;

[0008] The first processing module is used to perform link failure detection based on the reflected signal.

[0009] In a second aspect, the present application provides a link failure detection method, which is applied to a link failure detection device, the device comprising: a first processing module and a second processing module, the second processing module comprising: a measurement signal transmitting module and a measurement signal receiving module;

[0010] Receiving the measurement signal sent by the first processing module through the measurement signal transmitting module, and transmitting the measurement signal to the optical fiber;

[0011] The measurement signal receiving module receives the reflected signal transmitted by the optical fiber based on the measurement signal, and transmits the reflected signal to the first processing module;

[0012] Link failure detection is performed based on the reflected signal by the first processing module.

[0013] In a third aspect, the present application provides a storage medium having a computer program stored thereon, which implements the above-mentioned link failure detection method when executed by a processor.

[0014] In a fourth aspect, the present application provides a computer program product, including a computer program, which implements the above-mentioned link failure detection method when executed by a processor.

[0015] The present application provides a link fault detection device, method, storage medium and computer program product, the device includes: a first processing module and a second processing module, the second processing module includes: a measurement signal transmitting module, a measurement signal receiving module; the measurement signal transmitting module is used to receive the measurement signal sent by the first processing module and transmit the measurement signal to the optical fiber; the measurement signal receiving module is used to receive the reflection signal transmitted by the optical fiber based on the measurement signal, and transmit the reflection signal to the first processing module; the first processing module is used to detect the link fault based on the reflection signal. Using the above implementation scheme, when detecting the link fault of the network, by setting the measurement signal transmitting module and the measurement signal receiving module in the link fault detection device, the measurement signal sent by the first processing module can be directly received through the measurement signal transmitting module, and the measurement signal is transmitted to the optical fiber, and the measurement signal receiving module can receive the reflection signal reflected back by the optical fiber, so that when the measurement signal receiving module transmits the reflection signal to the first processing module, the first processing module can determine the fault in the network link according to the returned reflection signal, realize the automatic detection of the link fault, thereby improving the detection efficiency of the network fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of an exemplary base station fronthaul link;

[0017] Figure 2 A schematic diagram of using a detection instrument to determine a fronthaul link failure;

[0018] Figure 3 This is a schematic diagram of the curve peaks corresponding to each fault condition when using OTDR detection;

[0019] Figure 4 A schematic diagram of the structure of a link fault detection device provided in an embodiment of the present application;

[0020] Figure 5 The overall structure of a link fault detection device provided in an embodiment of the present application is shown in FIG. Figure 1 ;

[0021] Figure 6A schematic diagram of a capability structure supported by a base station and an optical module;

[0022] Figure 7 The overall structure of a link fault detection device provided in an embodiment of the present application is shown in FIG. Figure 2 ;

[0023] Figure 8 A flowchart of a link failure detection method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the technical solution of the present application is further elaborated in detail below in combination with the drawings and specific embodiments of the specification. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meaning as those commonly understood by those skilled in the art to which the present application belongs. The terms used in the embodiments of the present application are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0026] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict. It should also be noted that the terms "first / second / third" involved in the embodiments of the present application are only used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0027] According to the statistics of network failures, the problem with the highest failure rate in wireless networks is fronthaul link failure. The main causes of the failures are loose connectors, connector failures, dirty connectors, aging optical fibers, and construction digging. When a failure occurs at any point in the fronthaul link, the wireless network management will display a fronthaul link abnormality alarm.

[0028] After receiving the fault alarm information, the wireless network management department or the transmission department or multiple departments will jointly carry out repairs, and the operation and maintenance personnel need to use a handheld optical time domain reflectometer (OTDR) to measure the distance between the fault point and the machine room in the BBU room, and then go to the fault point for detection based on the distance, which takes a long time.

[0029] As the number of channels of wireless devices increases, transmission rates are evolving towards 50G or even higher, which places more stringent requirements on indicators such as loss, dispersion, and multipath interference of the fronthaul link.

[0030] like Figure 1 As shown, a schematic diagram of an exemplary base station fronthaul link is provided. Figure 1 The equipment room mainly includes BBU, combiner / splitter, and fiber distribution frame, the site fiber distribution box, combiner / splitter, active antenna unit (AAU) / radio remote unit (RRU) in the site, and the optical cross-connect box between the equipment room and the site. Figure 1 It can be seen that in the transmission link, there are nodes ① to ⑩. When any of the 10 nodes fails, it will cause loss on the transmission link.

[0031] In the related technologies, there is no method to monitor the fronthaul link network for a long time. Instead, it requires the coordination of multiple departments after the network management alarm, and the operation and maintenance personnel to locate the fault on site with detection instruments, such as Figure 2 The schematic diagram of using a detection instrument to determine the fronthaul link fault is shown in the figure. The instrument uses OTDR, which is made based on the principle of light backscattering and Fresnel reverse. It uses the backscattered light generated when light propagates in the optical fiber to obtain attenuation information. It is used to measure optical fiber attenuation, joint loss, optical fiber fault point location, etc. When using OTDR for detection, such as Figure 3 As shown in the figure, during the signal transmission process, different curve peaks will be displayed in the OTDR measurement display results for different fault conditions (such as breakage, bending, etc.). This detection method is time-consuming and has a great impact on the network.

[0032] To solve the above problems, the embodiments of the present application propose a link failure detection device and method for a base station fronthaul link, which can realize automatic detection of fronthaul link failures.

[0033] The technical solutions of the embodiments of the present application are as follows:

[0034] The present application embodiment provides a link failure detection device 1, such as Figure 4 As shown, the link fault detection device 1 includes: a first processing module 10 and a second processing module 20, the second processing module 20 includes: a measurement signal transmitting module 201 and a measurement signal receiving module 202; the measurement signal transmitting module 201 is used to receive the measurement signal sent by the first processing module 10 and transmit the measurement signal to the optical fiber; the measurement signal receiving module 202 is used to receive the reflection signal transmitted by the optical fiber based on the measurement signal, and transmit the reflection signal to the first processing module 10; the first processing module 10 is used to perform link fault detection based on the reflection signal.

[0035] In the embodiment of the present application, the first processing module 10 may be a base station device, such as a BBU or an AAU or an RRU.

[0036] In the embodiment of the present application, the second processing module 20 may be an optical module.

[0037] It should be noted that the optical module can be deployed on the base station equipment.

[0038] In the embodiment of the present application, the measurement signal transmitting module 201 is an OTDR data transmitting module.

[0039] In the embodiment of the present application, the measurement signal receiving module 202 is an OTDR data receiving module.

[0040] In the embodiment of the present application, the measurement signal is an OTDR signal.

[0041] In an embodiment of the present application, the BBU / AAU / RRU sends the OTDR signal to the OTDR transmitting module of the optical module, the OTDR transmitting module receives the OTDR signal sent by the BBU / AAU / RRU, and the OTDR transmitting module transmits the received OTDR signal to the optical fiber for data transmission.

[0042] In an embodiment of the present application, when the OTDR signal passes through the optical fiber, a reflected signal of the OTDR signal is generated. The reflected signal is returned to the optical module through the same optical fiber as the above process, and the reflected signal reflected back from the received optical fiber is transmitted to the BBU / AAU / RRU through the OTDR receiving module in the optical module.

[0043] In an embodiment of the present application, the BBU / AAU / RRU performs data parsing and analysis on the received reflected signal, and uses the analysis result to detect the fronthaul link failure.

[0044] It should be noted that when a fronthaul link fails, the BBU / AAU / RRU controls the sending of OTDR signals to the optical module, thereby achieving automatic detection of link failures through the aforementioned implementation process.

[0045] In one embodiment of the present application, the first processing module includes a first processor, and the second processing module includes a control module; the first processor is used to send a control mode and a measurement signal of a measurement signal to the control module; the control module is used to send a measurement signal to a measurement signal transmitting module, and control the measurement signal transmitting module to transmit the measurement signal to the optical fiber based on the control mode.

[0046] In the embodiment of the present application, the first processor may be a central processing unit (CPU).

[0047] It should be noted that the first processor may also be other processing units, which is not specifically limited in the embodiments of the present application.

[0048] In the embodiment of the present application, the control module may be a microcontroller.

[0049] In an embodiment of the present application, the control method includes at least one or more of the following: a sending time of a measurement signal, a sending interval of a measurement signal, a sending wave type of a measurement signal, and a pulse width of a measurement signal.

[0050] It should be noted that the control method includes but is not limited to the above control methods. Specifically, it can be selected according to actual conditions and is not specifically limited in the embodiments of the present application.

[0051] In an embodiment of the present application, the CPU and other processing units in the BBU / AAU / RRU send an OTDR signal to the microcontroller to transmit the OTDR signal to the microcontroller of the optical module. At the same time, because the CPU and other processing units can control the pulse information of the OTDR signal, the CPU can also send one or more of the sending time of the OTDR signal, the sending interval of the OTDR signal, the sending wave type of the OTDR signal, and the pulse width of the OTDR signal to the microcontroller.

[0052] In an embodiment of the present application, the OTDR signal is transmitted to the OTDR transmitting module by a microcontroller of the optical module, and the microcontroller controls the OTDR transmitting module to transmit the OTDR signal to the optical fiber according to one or more of the sending time of the OTDR signal, the sending interval of the OTDR signal, the sending wave type of the OTDR signal, and the pulse width of the OTDR signal.

[0053] In one embodiment of the present application, the first processing module includes a first processor, and the second processing module also includes a control module; the control module is also used to receive the reflected signal sent by the measurement signal receiving module and transmit the reflected signal to the first processor; the first processor is used to perform link fault detection based on the reflected signal.

[0054] In an embodiment of the present application, when the reflected signal is reflected from the optical fiber to the OTDR receiving module, the OTDR receiving module transmits the reflected signal to the microcontroller of the optical module. The microcontroller receives the reflected signal and transmits the reflected signal to a processing unit such as the CPU in the BBU / AAU / RRU.

[0055] In the embodiment of the present application, a processing unit such as a CPU receives a reflected signal, and the base station fronthaul link failure is detected by analyzing and processing the reflected signal by the processing unit such as the CPU.

[0056] In one embodiment of the present application, the link fault detection device also includes: a first interface and / or a second interface connecting the first processing module and the second processing module; the first interface is used to transmit measurement signals and / or reflection signals between the first processing module and the second processing module; and the second interface is used to transmit service data signals between the first processing module and the second processing module.

[0057] In the embodiment of the present application, the first interface may be an Inter-Integrated Circuit (I2C) interface.

[0058] In the embodiment of the present application, the second interface may be a serializer / deserializer (abbreviated as Serdes in English) interface.

[0059] In an embodiment of the present application, the OTDR signal or the reflected signal of the OTDR signal is transmitted between the BBU / AAU / RRU and the optical module via an I2C interface.

[0060] It should be noted that the specific transmission method of the OTDR signal or the reflected signal has been described in the above embodiments and will not be repeated here.

[0061] In an embodiment of the present application, traditional service data signals are transmitted between the BBU / AAU / RRU and the optical module via a Serdes interface.

[0062] In the embodiment of the present application, when the service data signal is transmitted, the service data signal is transmitted to the microcontroller through the service data processing unit such as the Application Specific Integrated Circuit (ASIC) on the BBU / AAU / RRU, and the service data signal is transmitted to the service data transmitting module in the optical module through the microcontroller, and the service data signal is transmitted to the optical fiber through the service data transmitting module. The data transmitted by the optical fiber is then transmitted to the service data receiving module in the optical module through the "service RX optical fiber", and is transmitted to the BBU / AAU / RRU through the service data receiving module via the Serdes interface for data processing.

[0063] It should be noted that the service data transmitting module may include a current controller, a laser and an optical circulator; the service data receiving module may include a photodetector and an amplifier.

[0064] In an embodiment of the present application, the first wavelength corresponding to the measurement signal or the reflection signal is the same as the second wavelength corresponding to the service data signal.

[0065] In the embodiment of the present application, the working wavelength corresponding to the service data signal and the wavelength of the OTDR signal required for link detection use the same wavelength, which saves the transmission module link device in the optical module.

[0066] Thus, compared with the optical module in the related art that requires two different wavelengths, namely the service data signal working wavelength λ1 and the OTDR signal wavelength λ2, the embodiment of the present application can simplify the design of the optical module with integrated OTDR function and reduce the cost.

[0067] It can be understood that a link fault detection device provided in an embodiment of the present application, when detecting a link fault in a network, can directly receive the measurement signal sent by the first processing module through the measurement signal transmission module by setting a measurement signal transmission module and a measurement signal receiving module in the link fault detection device, and transmit the measurement signal to the optical fiber, while the measurement signal receiving module can receive the reflected signal reflected back by the optical fiber. In this way, when the measurement signal receiving module transmits the reflected signal to the first processing module, the first processing module can determine the fault in the network link based on the returned reflected signal, and realize automatic detection of link faults, thereby improving the detection efficiency of network faults.

[0068] In the embodiment of the present application, the OTDR signal transmitting module may specifically include a current controller and a laser, and the OTDR signal receiving module may specifically include a photodetector and an A / D converter.

[0069] It should be noted that the OTDR signal transmitting module needs to transmit the OTDR signal to the optical fiber and the reflected signal generated in the optical fiber needs to be transmitted back to the OTDR signal receiving module through the optical circulator.

[0070] Based on the above embodiments, the present application also provides an overall structure diagram of a link fault detection device, such as Figure 5 As shown, in Figure 5 In the figure, the left frame represents a base station device, such as a BBU or AAU or RRU, and the right frame represents an optical module. The link fault detection device for the base station fronthaul link provided in the embodiment of the present application integrates a service data signal transmitting module, a service data signal receiving module, an OTDR signal transmitting module, an OTDR signal receiving module and a control module in the optical module, so that both the service data signal and the OTDR signal for link fault detection can be transmitted in one optical module. At the same time, the control and analysis functions of the OTDR signal are realized in the base station device.

[0071] Applicable to Figure 5The detection process of the device shown can be: for normal business data signals, the control and analysis of business data signals are realized through the base station equipment, and the interconnection and intercommunication of business data signals are realized through the business data signal transmitting module and the business data signal receiving module in the optical module. For OTDR signals, the control and analysis of OTDR signals are realized through the base station equipment, and the interconnection and intercommunication of OTDR signals are realized through the OTDR signal transmitting module and the OTDR signal receiving module in the optical module.

[0072] Capabilities supported by base stations and optical modules in related technologies (such as Figure 6 Compared with the link fault detection device proposed in the embodiment of the present application, in the related art, the BBU / AAU / RRU does not have the OTDR signal control and analysis capabilities, and the optical module does not have an OTDR signal transmitting module and an OTDR signal receiving module.

[0073] In the overall structure diagram of the link quality detection proposed above, the specific design structure in each module is as follows: Figure 7 As shown, Figure 7 The optical module transmits and receives fiber splitters and integrates OTDR capabilities. Figure 7 The components and their corresponding functions are as follows:

[0074] 1. Inside the optical module:

[0075] Current controller: sends out service data signals or OTDR signals.

[0076] Laser: Converts electrical signals into light signals.

[0077] Photodetector: Converts light signals into electrical intensity signals.

[0078] Amplifier: Amplifies electrical signals.

[0079] Microcontroller: controls and monitors each module.

[0080] A / D converter: Converts the intensity signal into a level signal.

[0081] 2. In base station equipment:

[0082] ASIC: business data processing and control.

[0083] CPU: OTDR data processing and control.

[0084] 3. Interface:

[0085] Serdes interface: high-speed service data signal interface.

[0086] I2C interface: OTDR signal interface.

[0087] pass Figure 7 The link fault detection device shown can implement the following processing flow:

[0088] (1) Business data signal processing flow:

[0089] Service data signal sending process: The service data processing unit such as ASIC in the BBU / AAU / RRU transmits the service data signal to the microcontroller of the optical module through the Serdes high-speed interface. The microcontroller sends the pulse information of the service data signal to the current controller. After receiving the pulse information, the current controller generates a waveform. For example, the 25G optical module generates a square wave signal of 1 / 25G=40fs, and then uses a laser to convert the electrical signal of the waveform into an optical signal, which is then transmitted to the optical fiber after passing through the optical circulator for service data signal transmission.

[0090] Service data signal receiving process: The service data signal transmitted by optical fiber is transmitted to the optical module through the "service RX optical fiber", and the optical signal is converted into an intensity signal through the photoelectric detector of the optical module. The signal is then shaped and amplified by the amplifier, and finally transmitted to the BBU / AAU / RRU through the Serdes interface for data processing.

[0091] (2) OTDR signal processing flow:

[0092] OTDR signal sending process: The CPU and other processing units in the BBU / AAU / RRU control the pulse information of the OTDR signal and transmit the control information of the OTDR signal to the microcontroller. The control information includes but is not limited to the sending time of the OTDR signal, the sending interval of the OTDR signal, the sending wave type of the OTDR signal, the pulse width of the OTDR signal, etc. Among them, the control information is transmitted to the microcontroller of the optical module through the I2C interface. At the same time, the OTDR signal is also transmitted to the microcontroller of the optical module through the I2C interface. The microcontroller transmits the OTDR signal to the current controller to generate a waveform, and then the electrical signal is converted into an optical signal through a laser. Finally, it is transmitted to the optical fiber after passing through the optical circulator for OTDR signal transmission.

[0093] OTDR signal receiving process: The reflected signal of the OTDR signal entering the optical fiber is reflected back to the optical module through the same optical fiber, and is output to the photodetector responsible for OTDR signal processing through the optical circulator in the optical module, which converts the optical signal into an electrical intensity signal, and then converts the electrical intensity signal into a level signal through A / D sampling. Finally, the reflected signal of the OTDR signal is transmitted to the BBU / AAU / RRU through the microcontroller and I2C interface, and the OTDR signal is analyzed in the CPU and other processing units.

[0094] Based on the above embodiments, in the embodiments of the present application, the interface of the service data signal and the interface of the OTDR signal are separated, and a small processing unit (such as a CPU) is designed to process the data transmitted by the management interface (such as an I2C interface). In the related art, the service data signal and the OTDR signal exchange data with the base station via the same interface, resulting in all management and configuration occupying the service data interface, and then entering the service data processing flow, or the service data signal processing and the OTDR signal processing are transmitted by the service signal interface, which will cause the OTDR signal processing to occupy the service data interface, and then enter the service data processing chip, and the process is complicated. Compared with the scheme proposed in the related art, the service data signal interface and the management data interface are separated in the embodiments of the present application. In addition to providing management and control capabilities, the management data interface also directly transmits the received OTDR signal to the CPU and other processing units of the base station, does not occupy the service data interface, and the processing flow is concise and more practical, so as to more simply realize the intelligent detection of the front transmission link failure, reduce the detection time of the pending account, and improve the network reliability.

[0095] Based on the above embodiments, a link failure detection method is also provided in another embodiment of the present application. Figure 8 As shown, it is applied to a link fault detection device, the link fault detection device includes: a first processing module and a second processing module, the second processing module includes: a measurement signal transmitting module and a measurement signal receiving module; the method may include:

[0096] S801. Receive a measurement signal sent by a first processing module through a measurement signal transmitting module, and transmit the measurement signal to an optical fiber.

[0097] In an embodiment of the present application, the first processing module may be a base station device, such as a BBU or an AAU or an RRU.

[0098] In the embodiment of the present application, the second processing module may be an optical module.

[0099] It should be noted that the optical module can be deployed on the base station equipment.

[0100] In the embodiment of the present application, the measurement signal transmitting module is an OTDR data transmitting module.

[0101] In the embodiment of the present application, the measurement signal receiving module is an OTDR data receiving module.

[0102] In the embodiment of the present application, the measurement signal is an OTDR signal.

[0103] In an embodiment of the present application, the BBU / AAU / RRU sends the OTDR signal to the OTDR transmitting module of the optical module, the OTDR transmitting module receives the OTDR signal sent by the BBU / AAU / RRU, and the OTDR transmitting module transmits the received OTDR signal to the optical fiber for data transmission.

[0104] S802: Receive a reflection signal transmitted by the optical fiber based on the measurement signal through a measurement signal receiving module, and transmit the reflection signal to a first processing module.

[0105] In an embodiment of the present application, when the OTDR signal passes through the optical fiber, a reflected signal of the OTDR signal is generated. The reflected signal is returned to the optical module through the same optical fiber as the above process, and the reflected signal reflected back from the received optical fiber is transmitted to the BBU / AAU / RRU through the OTDR receiving module in the optical module.

[0106] S803: Perform link fault detection based on the reflected signal by the first processing module.

[0107] In an embodiment of the present application, the BBU / AAU / RRU performs data parsing and analysis on the received reflected signal, and uses the analysis result to detect the fronthaul link failure.

[0108] It can be understood that a link fault detection method provided in an embodiment of the present application, when detecting a link fault in a network, can directly receive the measurement signal sent by the first processing module through the measurement signal transmitting module, and transmit the measurement signal to the optical fiber, while the measurement signal receiving module can receive the reflected signal reflected back by the optical fiber. In this way, when the measurement signal receiving module transmits the reflected signal to the first processing module, the first processing module can determine the fault in the network link based on the returned reflected signal, and realize automatic detection of link faults, thereby improving the detection efficiency of network faults.

[0109] In one embodiment of the present application, the first processing module includes a first processor, and the second processing module includes a control module; the control method and measurement signal of the measurement signal are sent to the control module through the first processor; the measurement signal is sent to the measurement signal transmitting module through the control module, and the measurement data transmitting module is controlled based on the control method to transmit the measurement signal to the optical fiber.

[0110] In the embodiment of the present application, the first processor may be a CPU.

[0111] In the embodiment of the present application, the control module may be a microcontroller.

[0112] In an embodiment of the present application, the control method includes at least one or more of the following: a sending time of a measurement signal, a sending interval of a measurement signal, a sending wave type of a measurement signal, and a pulse width of a measurement signal.

[0113] In an embodiment of the present application, an OTDR signal is sent to a microcontroller through a processing unit such as a CPU in the BBU / AAU / RRU to transmit the OTDR signal to the microcontroller of the optical module. At the same time, since the processing units such as the CPU can control the pulse information of the OTDR signal, one or more of the sending time of the OTDR signal, the sending interval of the OTDR signal, the sending wave type of the OTDR signal, and the pulse width of the OTDR signal can also be sent to the microcontroller through the CPU.

[0114] In an embodiment of the present application, an OTDR signal is sent to an OTDR transmitting module through a microcontroller of the optical module, and the OTDR transmitting module is controlled by the microcontroller to transmit the OTDR signal to the optical fiber according to one or more of the sending time of the OTDR signal, the sending interval of the OTDR signal, the sending wave type of the OTDR signal, and the pulse width of the OTDR signal.

[0115] In one embodiment of the present application, the first processing module includes a first processor, and the second processing module also includes a control module; the control module receives the reflected signal sent by the measurement signal receiving module and transmits the reflected signal to the first processor; the first processor performs link fault detection based on the reflected signal.

[0116] In an embodiment of the present application, when the reflected signal is reflected from the optical fiber to the OTDR receiving module, the OTDR receiving module transmits the reflected signal to the microcontroller of the optical module, receives the reflected signal through the microcontroller, and transmits the reflected signal to a processing unit such as the CPU in the BBU / AAU / RRU.

[0117] In the embodiment of the present application, a reflected signal is received by a processing unit such as a CPU, and the reflected signal is analyzed and processed to detect a base station fronthaul link failure.

[0118] In one embodiment of the present application, the link fault detection device also includes: a first interface and / or a second interface connecting the first processing module and the second processing module; transmitting a measurement signal and / or a reflection signal between the first processing module and the second processing module through the first interface; and transmitting a service data signal between the first processing module and the second processing module through the second interface.

[0119] In the embodiment of the present application, the first interface may be an I2C interface.

[0120] In the embodiment of the present application, the second interface may be a Serdes interface.

[0121] In an embodiment of the present application, the OTDR signal or the reflected signal of the OTDR signal is transmitted between the BBU / AAU / RRU and the optical module via an I2C interface.

[0122] In an embodiment of the present application, traditional service data signals are transmitted between the BBU / AAU / RRU and the optical module via a Serdes interface.

[0123] In the embodiment of the present application, when the service data signal is transmitted, the service data signal is transmitted to the microcontroller through the service data processing unit such as the Application Specific Integrated Circuit (ASIC) on the BBU / AAU / RRU, and the service data signal is transmitted to the service data transmitting module in the optical module through the microcontroller, and the service data signal is transmitted to the optical fiber through the service data transmitting module. The data transmitted by the optical fiber is then transmitted to the service data receiving module in the optical module through the "service RX optical fiber", and is transmitted to the BBU / AAU / RRU through the service data receiving module via the Serdes interface for data processing.

[0124] It should be noted that the service data transmitting module may include a current controller, a laser and an optical circulator; the service data receiving module may include a photodetector and an amplifier.

[0125] In the embodiment of the present application, the OTDR signal transmitting module may specifically include a current controller and a laser, and the OTDR signal receiving module may specifically include a photodetector and an A / D converter.

[0126] It should be noted that the OTDR signal transmitting module needs to transmit the OTDR signal to the optical fiber and the reflected signal generated in the optical fiber needs to be transmitted back to the OTDR signal receiving module through the optical circulator.

[0127] In an embodiment of the present application, the first wavelength corresponding to the measurement signal or the reflection signal is the same as the second wavelength corresponding to the service data signal.

[0128] In the embodiment of the present application, the working wavelength corresponding to the service data signal and the wavelength of the OTDR signal required for link detection use the same wavelength, which can save the transmission module link device in the optical module.

[0129] Based on the above embodiments, in the link failure detection method provided in the embodiments of the present application, the processing flow for service data can be specifically as follows:

[0130] Service data signal sending process: The service data processing unit such as ASIC in the BBU / AAU / RRU transmits the service data signal to the microcontroller of the optical module through the Serdes high-speed interface. The microcontroller sends the pulse information of the service data signal to the current controller. After receiving the pulse information, the current controller generates a waveform. For example, the 25G optical module generates a square wave signal of 1 / 25G=40fs, and then uses a laser to convert the electrical signal of the waveform into an optical signal, which is then transmitted to the optical fiber after passing through the optical circulator for service data signal transmission.

[0131] Service data signal receiving process: The service data signal transmitted by optical fiber is transmitted to the optical module through the "service RX optical fiber", and the optical signal is converted into an intensity signal through the photoelectric detector of the optical module. The signal is then shaped and amplified by the amplifier, and finally transmitted to the BBU / AAU / RRU through the Serdes interface for data processing.

[0132] Based on the above embodiments, in the link fault detection method provided in the embodiments of the present application, the processing flow for the OTDR signal can be specifically as follows:

[0133] OTDR signal transmission process: The CPU and other processing units in the BBU / AAU / RRU control the pulse information of the OTDR signal and transmit the control information of the OTDR to the microcontroller. The control information includes but is not limited to the sending time of the OTDR signal, the sending interval of the OTDR signal, the sending wave type of the OTDR signal, the pulse width of the OTDR signal, etc., wherein the control information is transmitted to the microcontroller of the optical module through the I2C interface. At the same time, the OTDR signal is also transmitted to the microcontroller of the optical module through the I2C interface. The microcontroller transmits the OTDR signal to the current controller to generate a waveform, and then converts the electrical signal into an optical signal through a laser, and finally transmits it to the optical fiber after passing through the optical circulator for OTDR signal transmission.

[0134] OTDR signal receiving process: The reflected signal of the OTDR signal entering the optical fiber is reflected back to the optical module through the same optical fiber, and is output to the photodetector responsible for OTDR signal processing through the optical circulator in the optical module, which converts the optical signal into an electrical intensity signal, and then converts the electrical intensity signal into a level signal through A / D sampling. Finally, the reflected signal of the OTDR signal is transmitted to the BBU / AAU / RRU through the microcontroller and I2C interface, and the OTDR signal is analyzed in the CPU and other processing units.

[0135] Based on the above embodiments, the embodiments of the present application provide a storage medium on which a computer program is stored, the computer-readable storage medium stores one or more programs, the one or more programs can be executed by one or more processors, and are applied to a link fault detection device, and the computer program implements the link fault detection method as described above. The processor can be at least one of an application-specific integrated circuit (ASIC, Application Specific Integrated Circuit), a digital signal processor (DSP, Digital Signal Processor), a digital signal processing image processing device (DSPD, Digital Signal Processing Device), a programmable logic image processing device (PLD, Programmable Logic Device), a field programmable gate array (FPGA, Field Programmable Gate Array), a CPU, a controller, a microcontroller, and a microprocessor. It can be understood that for different devices, the electronic device used to implement the above processor function can also be other, and the embodiments of the present application are not specifically limited.

[0136] Based on the above embodiments, an embodiment of the present application provides a computer program product, including a computer program. The computer program can be executed by one or more processors and is applied to a link failure detection device. The computer program implements the link failure detection method as described above.

[0137] It should be noted that in the embodiments of the present application, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0138] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD), including a number of instructions for an image display device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the method described in each embodiment of the embodiment of the present application.

[0139] The above is only a specific implementation of the embodiment of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A link failure detection device, characterized in that: The device comprises a first processing module and a second processing module, wherein the second processing module comprises: a measurement signal transmitting module and a measurement signal receiving module; The measurement signal transmitting module is used to receive the measurement signal sent by the first processing module and transmit the measurement signal to the optical fiber; The measurement signal receiving module is used to receive a reflection signal transmitted by the optical fiber based on the measurement signal, and transmit the reflection signal to the first processing module; The first processing module is used to perform link fault detection based on the reflected signal.

2. The device according to claim 1, characterized in that The first processing module includes a first processor, and the second processing module includes a control module; The first processor is used to send the control mode of the measurement signal and the measurement signal to the control module; The control module is used to send the measurement signal to the measurement signal transmitting module, and control the measurement signal transmitting module to transmit the measurement signal to the optical fiber based on the control method.

3. The device according to claim 2, characterized in that The control method includes at least one or more of the following: the sending time of the measurement signal, the sending interval of the measurement signal, the sending wave type of the measurement signal, and the pulse width of the measurement signal.

4. The device according to claim 1, characterized in that The first processing module includes a first processor, and the second processing module also includes a control module; The control module is further configured to receive the reflection signal sent by the measurement signal receiving module, and transmit the reflection signal to the first processor; The first processor is configured to perform link failure detection based on the reflected signal.

5. The device according to claim 1, characterized in that The device further comprises: a first interface and / or a second interface connecting the first processing module and the second processing module; The first interface is used for transmitting the measurement signal and / or the reflection signal between the first processing module and the second processing module; The second interface is used to transmit service data signals between the first processing module and the second processing module.

6. The device according to claim 5, characterized in that The first wavelength corresponding to the measurement signal or the reflected signal is the same as the second wavelength corresponding to the service data signal.

7. A link failure detection method, characterized in that: Applied to a link fault detection device, the device comprises: a first processing module and a second processing module, the second processing module comprises: a measurement signal transmitting module and a measurement signal receiving module; receiving the measurement signal sent by the first processing module through the measurement signal transmitting module, and transmitting the measurement signal to the optical fiber; Receiving, by the measurement signal receiving module, a reflection signal transmitted by the optical fiber based on the measurement signal, and transmitting the reflection signal to the first processing module; Link failure detection is performed based on the reflected signal by the first processing module.

8. The method according to claim 7, characterized in that The first processing module includes a first processor, and the second processing module includes a control module; sending the control mode of the measurement signal and the measurement signal to the control module through the first processor; The control module sends the measurement signal to the measurement signal transmitting module, and the measurement data transmitting module is controlled based on the control method to transmit the measurement signal to the optical fiber.

9. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 7 to 8 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the computer program implements the method according to any one of claims 7 to 8.

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