CN112367115A - Real-time optical fiber detection module and method applied to 5G forward transmission WDM system - Google Patents
Real-time optical fiber detection module and method applied to 5G forward transmission WDM system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
Abstract
The invention discloses a real-time optical fiber detection module and a method applied to a 5G forward-transmission WDM system, comprising a circulator, wherein the circulator is connected with an LD light-emitting unit and an APD light-receiving unit and is connected with a multipath optical signal multiplexer; the LD light-emitting unit is connected with an LD power supply control unit, the APD light-receiving unit is connected with an APD power supply control unit, the APD light-receiving unit is also connected with a transimpedance amplification unit and a high-speed AD unit, the high-speed AD unit is connected with an FPGA control acquisition unit, and the FPGA control acquisition unit is connected with a CPU management unit; the FPGA control acquisition unit is also respectively connected with the LD power supply control unit and the APD power supply control unit. And the CPU management unit controls the FPGA to control the acquisition unit to switch to a corresponding test optical fiber to perform repeated tests for multiple times according to the received detection instruction, acquires corresponding test data, and then transmits the test data back to the CPU management unit for storage. The invention has the characteristics of time and labor saving, low detection cost and capability of detecting the optical fiber in real time.
Description
Technical Field
The invention relates to an optical fiber detection device, in particular to a real-time optical fiber detection module and a method applied to a 5G forward WDM system.
Background
With the issuance of 5G license plates in China, 5G optical networks are being actively built, 5G is moving towards the direction of higher speed, lower time delay and lower power consumption, fronthaul optical networks have become one of the essential important means for improving the comprehensive capability thereof, and new architecture fronthaul networks C-RAN have been produced. The 5G C-RAN architecture will bring about a large increase in optical fiber demand, and is still far from meeting the rapidly increasing 5G station building demand despite the massive application of WDM technology; different from the chimney type and star type distributed access network architecture in the traditional 3G/4G era, the 5G fronthaul network architecture fully applies the technologies of network virtualization, wireless cloud, mobile edge computing and the like, and the fronthaul network value is continuously highlighted by saving site resources and improving the utilization efficiency of air interface resources through centralized distribution. This inevitably leads to massive expansion of the optical fibers in terms of cardinality, and also greatly increases the density, and the application of the high-density multi-core optical cable will become a normal state. Therefore, a large amount of optical fibers need to be distributed in limited pipeline resources, challenges in the aspects of optical fiber size, bending performance and the like are brought, and unprecedented strict requirements are brought to construction, operation and maintenance. At present, in order to solve the problem of optical fiber construction quality in the process of carrying out large-scale optical fiber construction on a 5G fronthaul network, a large number of detection instruments and professionals need to be respectively equipped to evaluate the optical fiber construction quality, so that the time and labor consumption and the detection cost are high, and the optical fiber cannot be detected in real time. Therefore, the prior art has the problems of time and labor consumption, high detection cost and incapability of detecting the optical fiber in real time.
Disclosure of Invention
The invention aims to provide a real-time optical fiber detection module and a real-time optical fiber detection method applied to a 5G forward WDM system. The invention has the characteristics of time and labor saving, low detection cost and capability of detecting the optical fiber in real time.
The technical scheme of the invention is as follows: a real-time optical fiber detection module applied to a 5G forward WDM system comprises a circulator, wherein the circulator is connected with an LD light-emitting unit and an APD light-receiving unit through an internal optical fiber, the circulator is connected with a multi-path optical signal multiplexer through an external optical fiber, and the multi-path optical signal multiplexer is connected with a main optical fiber circuit; the LD light-emitting unit is connected with an LD power supply control unit, the APD light-receiving unit is connected with an APD power supply control unit, the APD light-receiving unit is also connected with a transimpedance amplification unit and a high-speed AD unit, the high-speed AD unit is connected with an FPGA control acquisition unit, and the FPGA control acquisition unit is connected with a CPU management unit; the FPGA control acquisition unit is also respectively connected with the LD power supply control unit and the APD power supply control unit.
In the real-time optical fiber detection module applied to the 5G forward-transmission WDM system, the FPGA control acquisition unit comprises an SPI slave controller, one end of the SPI slave controller is connected with a configuration register, the configuration register is respectively connected with an LD controller, an APD controller, an AD controller and a light path selection controller, and the other end of the SPI slave controller is connected with a CPU management unit through an SPI interface;
the system also comprises a high-speed AD acquisition bus, wherein the high-speed AD acquisition bus is connected with a data acceleration unit, the data acceleration unit is connected with a bottom UDP protocol stack, and the bottom UDP protocol stack is connected with the CPU management unit through a GMII interface.
In the real-time optical fiber detection module applied to the 5G forward WDM system, the LD power control unit includes an LD pulse controller and an LD power controller; the LD controller is connected with the LD pulse controller through an LVDS interface, and the LD controller is connected with the LD power supply controller through an IIC interface;
the APD controller is connected with the APD power supply control unit through an IIC interface;
the AD controller is connected with the high-speed AD unit through the SPI interface;
the optical path selection controller is connected with the multi-path optical signal multiplexer;
the high-speed AD acquisition bus is connected with the LVDS interface, the IIC interface, the SPI interface and the GMII interface.
In the real-time optical fiber detection module applied to the 5G forward-transmitting WDM system, the CPU management unit includes a backplane management interface, the backplane management interface is connected with an SNMP protocol stack, and the SNMP protocol stack is connected with an SPI master controller and an upper UDP protocol stack respectively.
In the real-time optical fiber detection module applied to the 5G forward WDM system, the SPI master controller is connected with the SPI slave controller through the SPI interface; one end of the upper UDP protocol stack is connected with the bottom UDP protocol stack through a GMII interface, and the other end of the upper UDP protocol stack is provided with a data storage unit.
The CPU management unit controls the FPGA to control the acquisition unit to switch to a corresponding test optical fiber to perform repeated tests for multiple times according to the received detection instruction, acquires corresponding test data, and then transmits the test data back to the CPU management unit for storage.
In the real-time optical fiber detection method applied to the 5G fronthaul WDM system, the CPU management unit transmits the test data to the system management platform, and the system management platform generates a network quality evaluation report.
The real-time optical fiber detection method applied to the 5G forward WDM system comprises the following steps:
and 7, after receiving the UDP message data, the CPU management unit analyzes the data by using an upper UDP protocol stack, restores the test waveform data and stores the test waveform data as a standard OTDR test file.
The foregoing real-time optical fiber detection method applied to the WDM system of 5G forwarding further includes step 8, specifically as follows,
and 8, generating a standard SNMP message by the OTDR test file through an SNMP protocol stack according to system requirements, transmitting the SNMP message to an upper system management platform through a back panel management interface, and generating a related network quality evaluation report, or comparing historical test data by the upper system management platform to prejudge the optical fiber network condition.
In the foregoing real-time optical fiber detection method applied to the 5G forward WDM system, the default configuration parameters in step 2 are: the pulse width of the signal is 10 ns; the default number of accumulations in step 5 is 10000.
Compared with the prior art, the invention is designed based on the optical time domain reflection principle and is manufactured according to the back scattering of light and the Fresnel reflection principle. The modularized real-time optical fiber detection module is composed of a circulator, an LD light emitting unit, an APD light receiving unit, a multi-channel optical signal multiplexer, an LD power control unit, an APD power control unit, a transimpedance amplification unit, a high-speed AD unit, an FPGA control acquisition unit, a CPU management unit and the like, and obtains attenuation information by utilizing backward scattering light generated during propagation in optical fibers, so that the functions of detection of optical fiber attenuation, detection of joint loss, positioning of optical fiber fault points, understanding of loss distribution conditions of the optical fibers along the length and the like can be realized, and the modularized real-time optical fiber detection module has excellent expansibility and applicability and can be expanded into other 5G forward transmission schemes such as optical fiber direct drive and active OTN; by adopting the optical fiber detection module, a constructor does not need to detect each line independently, and only a fault line is rectified, so that a large amount of manpower and material resources are saved, time and labor are saved, and the detection cost (including equipment cost and labor cost) can be effectively reduced; after the optical fiber line finds a fault, the optical fiber line can be directly scanned, so that problems can be found in time, the position of the fault point can be accurately positioned, the working efficiency of operation and maintenance personnel is greatly improved, and the purpose of detecting the optical fiber to be tested in real time on line is realized. In conclusion, the invention has the characteristics of time and labor saving, low detection cost and capability of detecting the optical fiber in real time.
Drawings
FIG. 1 is a schematic diagram of the overall application of the present invention;
FIG. 2 is a schematic structural view of the present invention;
fig. 3 is a schematic diagram of the control acquisition of the present invention.
The labels in the figures are: 1-circulator, 2-LD light emitting unit, 3-APD light receiving unit, 4-multipath light signal multiplexer, 5-LD power supply control unit, 6-APD power supply control unit, 7-transimpedance amplifier unit, 8-high speed AD unit, 9-FPGA control acquisition unit, 10-CPU management unit, 11-AAU site, 12-multi-core cable, 13-DU equipment, 101-backboard management interface, 102-SNMP protocol stack, 103-SPI main controller, 104-upper layer UDP protocol stack, 105-data storage unit, 901-SPI slave controller, 902-configuration register, 903-LD controller, 904-APD controller, 905-AD controller, 906-light path selection controller, 907-high speed AD acquisition bus, 908-data acceleration unit, 909-underlying UDP protocol stack.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Examples are given. A real-time optical fiber detection module applied to a 5G forward WDM system is shown in figures 1 to 3 and comprises a circulator 1, wherein the circulator 1 is connected with an LD light-emitting unit 2 and an APD light receiving unit 3 through an internal optical fiber, the circulator 1 is connected with a multi-path optical signal multiplexer 4 through an external optical fiber, and the multi-path optical signal multiplexer 4 is connected with a main optical fiber circuit; the LD light-emitting unit 2 is connected with an LD power supply control unit 5, the APD light-receiving unit 3 is connected with an APD power supply control unit 6, the APD light-receiving unit 3 is also connected with a transimpedance amplification unit 7 and a high-speed AD unit 8, the high-speed AD unit 8 is connected with an FPGA control acquisition unit 9, and the FPGA control acquisition unit 9 is connected with a CPU management unit 10; the FPGA control acquisition unit 9 is also respectively connected with the LD power supply control unit 5 and the APD power supply control unit 6.
The FPGA control acquisition unit 9 includes an SPI slave controller 901, one end of the SPI slave controller 901 is connected with a configuration register 902, the configuration register 902 is respectively connected with an LD controller 903, an APD controller 904, an AD controller 905 and a light path selection controller 906, and the other end of the SPI slave controller 901 is connected with the CPU management unit 10 through an SPI interface;
the system also comprises a high-speed AD acquisition bus 907, the high-speed AD acquisition bus 907 is connected with a data acceleration unit 908, the data acceleration unit 908 is connected with a bottom layer UDP protocol stack 909, and the bottom layer UDP protocol stack 909 is connected with the CPU management unit 10 through a GMII interface.
The LD power supply control unit 5 includes an LD pulse controller and an LD power supply controller; the LD controller 903 is connected with an LD pulse controller through an LVDS interface, and the LD controller 903 is connected with an LD power supply controller through an IIC interface;
the APD controller 904 is connected to the APD power control unit 6 through an IIC interface;
the AD controller 905 is connected with the high-speed AD unit 8 through an SPI interface;
the optical path selection controller 906 is connected to the multiplex optical signal multiplexer 4;
the high-speed AD acquisition bus 907 is connected with the LVDS interface, the IIC interface, the SPI interface and the GMII interface.
The CPU management unit 10 includes a backplane management interface 101, the backplane management interface 101 is connected to an SNMP protocol stack 102, and the SNMP protocol stack 102 is connected to an SPI master controller 103 and an upper UDP protocol stack 104, respectively.
The SPI master controller 103 is connected to the SPI slave controller 901 via an SPI interface; one end of the upper layer UDP protocol stack 104 is connected to the lower layer UDP protocol stack 909 through the GMII interface, and the other end of the upper layer UDP protocol stack 104 is provided with the data storage unit 105.
The CPU management unit controls the FPGA to control the acquisition unit to switch to a corresponding test optical fiber to perform repeated tests for multiple times according to the received detection instruction, acquires corresponding test data, and then transmits the test data back to the CPU management unit for storage.
And the CPU management unit transmits the test data to the system management platform, and the system management platform generates a network quality evaluation report.
The method comprises the following steps:
and 7, after receiving the UDP message data, the CPU management unit analyzes the data by using an upper UDP protocol stack, restores the test waveform data and stores the test waveform data as a standard OTDR test file.
Further comprising a step 8 of, in particular,
and 8, generating a standard SNMP message by the OTDR test file through an SNMP protocol stack according to system requirements, transmitting the SNMP message to an upper system management platform through a back panel management interface, and generating a related network quality evaluation report, or comparing historical test data by the upper system management platform to prejudge the optical fiber network condition.
The default configuration parameters in step 2 are: the pulse width of the signal is 10 ns; the default number of accumulations in step 5 is 10000.
As shown in fig. 1, the overall application scheme includes an AAU station 11, a multi-core cable 12, a DU device 13, a fiber detection module, and a multiplexer. Taking data transmission from the AAU to the DU as an example, the AAU site 11 uses optical signals with different wavelengths to perform communication through the color optical module, performs wavelength division multiplexing through the WDM on the AAU side, converges to a single optical fiber, integrates to the multi-core cable 12, and after transmitting to the DU side, performs demultiplexing through the WDM on the DU side, and connects to different ports of the DU device 13 respectively. And the optical fiber detection module is arranged at the DU side, respectively connects the test signals to different optical fibers in the multi-core cable 12 through a multi-path optical signal selector, can scan any fiber core of the trunk line optical fiber, and records the fiber core as a data file for intelligent modeling or transmitting the data file to an application layer for standby.
As shown in fig. 2, the optical fiber detection module includes an FPGA control acquisition unit 9, a CPU management unit 10, an LD power supply control unit 5, an LD light emitting unit 2, a circulator 1, an APD power supply control unit 6, an APD light receiving unit 3, a transimpedance amplification unit 7, and a high-speed AD unit 8. The CPU management unit 10 is used for analyzing an application layer management message, is connected with the parameter configuration of the FPGA control acquisition unit 9, is a center of system management and data analysis, is mainly used for configuring a relevant register module of the FPGA control acquisition unit 9 through an SPI bus and receiving test waveform curve data through a GMII interface. The FPGA control acquisition unit 9 is a core of system hardware control and data acquisition, and is responsible for peripheral parameter related configuration, such as configuring the LD power control unit 5 and adjusting the LD light emitting power; the APD power supply control unit 6 is configured to adjust the reception sensitivity of the APD. On the other hand, the LD light emitting unit 2 is controlled to transmit a test pulse, and fiber reflection data is synchronously collected through a data bus connected to the high-speed AD unit 8.
The circulator 1 is a multi-port non-reciprocal optical device, light can only propagate along one direction, and the circulator has the function of conducting a test pulse sent by an LD to a test optical fiber, then conducting a reflection signal back to an APD, and isolating a circuit between the LD and the APD. High isolation and low insertion loss.
The insertion loss of the circulator used by the system is only 0.5-0.7 db.
The transimpedance amplification unit 7 belongs to a hardware conversion circuit, performs voltage conversion, gain amplification and differential conversion on photocurrent generated by the APD, can configure gain to 5K ohm and 20K ohm, controls voltage fluctuation in a range of-1V to +1V, adapts to the AD sampling range, and weakens common mode interference.
As shown in fig. 3, the detailed process of controlling and collecting the intelligent fiber detection module is as follows,
in the aspect of controlling the acquisition unit by the FPGA, an SPI slave controller 901 with a 32-bit bandwidth is connected to the configuration register 902, and can write the configuration information of the CPU management unit into the configuration register 902, and also can read back the state of the relevant peripheral in the configuration register 902 to the CPU management unit, thereby completing the interaction of control and state information. The configuration register 902 is responsible for controlling all relevant peripherals and functional modules, and includes an LD controller 903, an APD controller 904, an AD controller 905, and an optical path selection controller 906.
The LD controller 903 is connected to the LD pulse controller through an LVDS interface, and can complete pulse current triggering for a minimum of 5 ns. The width of the pulse current is directly reflected to the width of the test light pulse, and the measurement precision in time domain reflection is directly influenced. Considering that the refractive index of the optical fiber is generally 1.477, the transmission rate of light in the optical fiber is about 20 km/s, i.e., 0.2 m/ns. Considering again that the reflected signal is actually two-way from transmit to receive, the measurement range scale is 0.1 m/ns. Therefore, the corresponding measurement precision of 5ns pulse is 0.5m, and the method belongs to high-precision fault positioning.
The LD controller 903 is connected to the LD power controller using an IIC interface, and may perform 8 th-gear voltage trimming.
The APD controller 904 is connected with the APD power supply controller by an IIC interface, and can realize fine adjustment of 256 voltage levels and fine adjustment and control of receiving sensitivity.
The AD controller 905 is connected to the high-speed AD unit through the SPI interface, can control the AD maximum working rate of 250M, and is matched with the functions of gain adjustment, range conversion, and the like.
The optical path selection controller 906 selects an optical channel by adopting a direct level control mode, and can be provided with selectors of different levels according to different fiber core numbers of the optical cable to maximally support 64 fiber core selections.
The FPGA control acquisition unit comprises a high-speed AD acquisition bus 907, a data acceleration unit 908 and a UDP message protocol stack 909.
The high-speed AD acquisition bus 907 is directly connected to an AD chip through a DDR data bus, the maximum working frequency is 250M, the throughput bandwidth is 2000M, and massive high-precision signal sampling can be rapidly completed.
The data acceleration unit 908 uses the internal logic of the FPGA and the DSP resources, and uses a multi-parallel and pipeline technique to realize fast waveform data processing, and fulfill requirements on noise reduction, smoothness, and the like, such as cyclic parallel accumulation, so that the influence of random noise can be greatly eliminated, and the system gain can be improved. Through tests, the gain parameters of the external transimpedance amplification unit are accumulated for 10 times under the condition of selecting 20K, the system noise is 405uVrms, after the system noise is accumulated for 10000 times, the system noise is reduced to 14uVrms, and the noise elimination effect is obvious.
The UDP stack 909 is responsible for packing the processed waveform data into a standard UDP packet, and transmitting the standard UDP packet to the CPU management unit through the GMII interface. Parameters such as mac, ip and port related to the UDP message are directly initialized to a UDP protocol stack by the CPU through the SPI bus and are updated at any time according to different system configurations.
The control aspects of the CPU management unit are mainly the processing of SNMP control messages and the storage of waveform test files. After the waveform data is transmitted to the CPU management unit through the GMII interface, the data is restored in the local UDP protocol stack, and on the one hand, an OTDR standard test file is formed through the data storage unit 105 and stored in the local memory. On the one hand, the SNMP protocol stack 102 is repackaged into a standard SNMP message, and the standard SNMP message is transmitted to the management layer through the backplane management interface 101. The management layer can also send a management configuration message to the CPU management unit through the backplane management interface 101, and the management configuration message is analyzed by the SNMP protocol stack 102 to form register configuration information, and configured to the FPGA configuration register through the SPI master controller 103, thereby controlling the related peripheral devices.
The real-time optical fiber detection method applied to the 5G forward WDM system is as follows:
And 3, synchronously starting to receive the reflected light signal of the test optical fiber by the APD light receiving unit through the circulator, converting the reflected light signal into a current index, further converting and amplifying the current index into a voltage signal through the transimpedance amplification unit, and providing the voltage signal for the high-speed AD unit for sampling. The FPGA controls the acquisition unit, and also synchronously opens the high-speed AD acquisition bus to start receiving the digital signals acquired and converted by the high-speed AD unit.
And 4, the FPGA control acquisition unit converts the length parameters of the tested optical fibers in the configuration register into time parameters, confirms the acquisition period, and automatically closes the high-speed AD acquisition bus after the period reaches the standard to finish single data acquisition.
And 5, under the mode of testing the accumulation result for multiple times, sampling the tested optical fiber for multiple times, controlling the acquisition unit by the FPGA, controlling the LD light-emitting unit again according to the accumulation times set in the configuration register, sending a test pulse signal, repeating the steps 2 to 4, processing by the data acceleration unit, synchronously finishing the processing of waveform data when the accumulation times reach the standard, and finishing the test.
And 6, after the data test is finished, generating a standard UDP message by a UDP protocol stack of the FPGA control acquisition unit, and sending the standard UDP message to the CPU management unit through the GMII interface.
And 7, after receiving the UDP message data, the CPU management unit analyzes the data in a local UDP protocol stack, restores the test waveform data, and stores the test waveform data as a standard OTDR test file through the data storage unit.
And 8, according to the requirement of the system, generating a standard SNMP message from the test file by the CPU through the SNMP protocol stack, and transmitting the standard SNMP message to the system management platform through the backboard management interface. And (3) in cooperation with intelligent application of a service layer, further analyzing the test result, generating a related network quality evaluation report, and giving an alarm or other processing suggestions. The previous test records can also be compared to prejudge the optical fiber network condition.
Claims (10)
1. A real-time optical fiber detection module applied to a 5G forward WDM system is characterized in that: the device comprises a circulator (1), wherein the circulator (1) is connected with an LD light-emitting unit (2) and an APD light receiving unit (3) through an internal optical fiber, the circulator (1) is connected with a multipath optical signal multiplexer (4) through an external optical fiber, and the multipath optical signal multiplexer (4) is connected with a main optical fiber circuit; the LD light-emitting unit (2) is connected with an LD power supply control unit (5), the APD light-receiving unit (3) is connected with an APD power supply control unit (6), the APD light-receiving unit (3) is also connected with a transimpedance amplification unit (7) and a high-speed AD unit (8), the high-speed AD unit (8) is connected with an FPGA control acquisition unit (9), and the FPGA control acquisition unit (9) is connected with a CPU management unit (10); the FPGA control acquisition unit (9) is also respectively connected with the LD power supply control unit (5) and the APD power supply control unit (6).
2. A WDM system real-time optical fiber detection module applied in 5G forwarding according to claim 1, wherein: the FPGA control acquisition unit (9) comprises an SPI slave controller (901), one end of the SPI slave controller (901) is connected with a configuration register (902), the configuration register (902) is respectively connected with an LD controller (903), an APD controller (904), an AD controller (905) and a light path selection controller (906), and the other end of the SPI slave controller (901) is connected with the CPU management unit (10) through an SPI interface;
the system also comprises a high-speed AD acquisition bus (907), the high-speed AD acquisition bus (907) is connected with a data acceleration unit (908), the data acceleration unit (908) is connected with a bottom layer UDP protocol stack (909), and the bottom layer UDP protocol stack (909) is connected with the CPU management unit (10) through a GMII interface.
3. A WDM system real-time optical fiber detection module applied in 5G forwarding according to claim 2, wherein: the LD power supply control unit (5) comprises an LD pulse controller and an LD power supply controller; the LD controller (903) is connected with the LD pulse controller through an LVDS interface, and the LD controller (903) is connected with the LD power supply controller through an IIC interface;
the APD controller (904) is connected with the APD power supply control unit (6) through an IIC interface;
the AD controller (905) is connected with the high-speed AD unit (8) through an SPI interface;
the optical path selection controller (906) is connected with the multi-path optical signal multiplexer (4);
and the high-speed AD acquisition bus (907) is connected with the LVDS interface, the IIC interface, the SPI interface and the GMII interface.
4. A WDM system real-time optical fiber detection module applied in 5G forwarding according to claim 2, wherein: the CPU management unit (10) comprises a back panel management interface (101), the back panel management interface (101) is connected with an SNMP protocol stack (102), and the SNMP protocol stack (102) is respectively connected with an SPI main controller (103) and an upper UDP protocol stack (104).
5. A WDM system real-time fiber detection module according to claim 4, wherein: the SPI master controller (103) is connected with the SPI slave controller (901) through an SPI interface; one end of the upper layer UDP protocol stack (104) is connected with the bottom layer UDP protocol stack (909) through a GMII interface, and the other end of the upper layer UDP protocol stack (104) is provided with a data storage unit (105).
6. The real-time optical fiber detection method applied to the 5G forward WDM system is characterized in that: and the CPU management unit controls the FPGA to control the acquisition unit to switch to a corresponding test optical fiber to perform repeated tests for multiple times according to the received detection instruction, acquires corresponding test data, and then transmits the test data back to the CPU management unit for storage.
7. A WDM system real-time optical fiber detection method for 5G forwarding according to claim 6, wherein: and the CPU management unit transmits the test data to the system management platform, and the system management platform generates a network quality evaluation report.
8. A WDM system real-time optical fiber detection method applied in 5G forwarding according to claim 6, characterized in that it comprises the following steps:
step 1, after receiving a detection instruction, a CPU management unit sends a test instruction to an FPGA control acquisition unit, and the FPGA control acquisition unit firstly controls a multipath optical signal selector to be switched to an optical fiber to be tested;
step 2, the FPGA control acquisition unit controls the LD light-emitting unit to send a test pulse signal according to default configuration parameters, and the test pulse signal enters a test optical fiber of a channel selected by the multi-path optical signal selector through the circulator;
step 3, synchronously receiving a reflected light signal of the test optical fiber by the APD light receiving unit and converting the reflected light signal into a current index, converting the current index into a voltage signal through the transimpedance amplification unit, and providing the voltage signal for the high-speed AD unit for sampling; the high-speed AD acquisition bus receives the digital signals acquired and converted by the high-speed AD unit;
step 4, the FPGA controls the acquisition unit to determine an acquisition period according to the configured length of the test optical fiber, and automatically closes the high-speed AD acquisition bus after the period reaches the standard, so as to finish single data acquisition;
step 5, sampling the tested optical fiber for multiple times, and repeating the steps 2 to 4 by the FPGA control acquisition unit according to the required accumulation times until the accumulation times reach the standard;
step 6, after the data test is finished, generating standard UDP message data in a bottom UDP protocol stack, and sending the standard UDP message data to a CPU management unit through a GMII interface;
and 7, after receiving the UDP message data, the CPU management unit analyzes the data by using an upper UDP protocol stack, restores the test waveform data and stores the test waveform data as a standard OTDR test file.
9. A WDM system real-time optical fiber detection method for 5G forwarding according to claim 8, wherein: further comprising a step 8 of, in particular,
and 8, generating a standard SNMP message by the OTDR test file through an SNMP protocol stack according to system requirements, transmitting the SNMP message to an upper system management platform through a back panel management interface, and generating a related network quality evaluation report, or comparing historical test data by the upper system management platform to prejudge the optical fiber network condition.
10. A WDM system real-time optical fiber detection method for 5G forwarding according to claim 8, wherein: the default configuration parameters in step 2 are: the pulse width of the signal is 10 ns; the default number of accumulations in step 5 is 10000.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117595928A (en) * | 2024-01-17 | 2024-02-23 | 苏州元脑智能科技有限公司 | Annotate wrong test fixture |
| CN117595928B (en) * | 2024-01-17 | 2024-04-05 | 苏州元脑智能科技有限公司 | Annotate wrong test fixture |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5793909A (en) * | 1996-09-09 | 1998-08-11 | Lucent Technologies Inc. | Optical monitoring and test access module |
| CN1333454A (en) * | 2000-07-12 | 2002-01-30 | 信息产业部武汉邮电科学研究院 | Optical cable real time monitoring system |
| CN101630972A (en) * | 2009-08-19 | 2010-01-20 | 烽火通信科技股份有限公司 | Optical fiber line intelligent detection system and optical fiber line intelligent detection method for wavelength division multiplex (WDM) network |
| CN102957977A (en) * | 2012-09-04 | 2013-03-06 | 青岛海信宽带多媒体技术有限公司 | Passive optical network and optical time domain detector optical module thereof |
| US20150229389A1 (en) * | 2014-02-13 | 2015-08-13 | Electronics And Telecommunications Research Institute | Apparatus and method for detecting optical line fault in passive optical network |
| CN109617610A (en) * | 2018-11-22 | 2019-04-12 | 江苏亨通光网科技有限公司 | Single wavelength 100G optical module and 5G forward pass network |
| CN110505008A (en) * | 2019-08-16 | 2019-11-26 | 杭州初灵信息技术股份有限公司 | Wavelength-division multiplex applied to 5G forward pass perceives protection system and perception guard method |
| CN210274104U (en) * | 2019-08-16 | 2020-04-07 | 杭州初灵信息技术股份有限公司 | 5G forwarding equipment based on semi-passive WDM technology |
| CN111049617A (en) * | 2019-12-18 | 2020-04-21 | 东莞铭普光磁股份有限公司 | Optical network transmission integrated equipment and method for 5G forward transmission |
| US20200200592A1 (en) * | 2018-12-21 | 2020-06-25 | Nec Laboratories America, Inc | Optical fiber sensing systems, methods, structures and applications |
| CN213152059U (en) * | 2020-10-13 | 2021-05-07 | 杭州初灵信息技术股份有限公司 | WDM system real-time optical fiber detection module applied to 5G forward transmission |
-
2020
- 2020-10-13 CN CN202011089963.5A patent/CN112367115B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5793909A (en) * | 1996-09-09 | 1998-08-11 | Lucent Technologies Inc. | Optical monitoring and test access module |
| CN1333454A (en) * | 2000-07-12 | 2002-01-30 | 信息产业部武汉邮电科学研究院 | Optical cable real time monitoring system |
| CN101630972A (en) * | 2009-08-19 | 2010-01-20 | 烽火通信科技股份有限公司 | Optical fiber line intelligent detection system and optical fiber line intelligent detection method for wavelength division multiplex (WDM) network |
| CN102957977A (en) * | 2012-09-04 | 2013-03-06 | 青岛海信宽带多媒体技术有限公司 | Passive optical network and optical time domain detector optical module thereof |
| US20150229389A1 (en) * | 2014-02-13 | 2015-08-13 | Electronics And Telecommunications Research Institute | Apparatus and method for detecting optical line fault in passive optical network |
| CN109617610A (en) * | 2018-11-22 | 2019-04-12 | 江苏亨通光网科技有限公司 | Single wavelength 100G optical module and 5G forward pass network |
| US20200200592A1 (en) * | 2018-12-21 | 2020-06-25 | Nec Laboratories America, Inc | Optical fiber sensing systems, methods, structures and applications |
| CN110505008A (en) * | 2019-08-16 | 2019-11-26 | 杭州初灵信息技术股份有限公司 | Wavelength-division multiplex applied to 5G forward pass perceives protection system and perception guard method |
| CN210274104U (en) * | 2019-08-16 | 2020-04-07 | 杭州初灵信息技术股份有限公司 | 5G forwarding equipment based on semi-passive WDM technology |
| CN111049617A (en) * | 2019-12-18 | 2020-04-21 | 东莞铭普光磁股份有限公司 | Optical network transmission integrated equipment and method for 5G forward transmission |
| CN213152059U (en) * | 2020-10-13 | 2021-05-07 | 杭州初灵信息技术股份有限公司 | WDM system real-time optical fiber detection module applied to 5G forward transmission |
Non-Patent Citations (3)
| Title |
|---|
| KYOSUKE SONE: "Demonstration of Remote Management and Control in WDM-PON System for 5G Fronthaul", 《2018 23RD OPTO-ELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC)》 * |
| 汤瑞;吴冰冰: "5G前传WDM技术方案进展分析", 《信息通信技术与政策》 * |
| 翁先正: "半有源前传方案两种实现技术对比", 《科技创新与应用》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117595928A (en) * | 2024-01-17 | 2024-02-23 | 苏州元脑智能科技有限公司 | Annotate wrong test fixture |
| CN117595928B (en) * | 2024-01-17 | 2024-04-05 | 苏州元脑智能科技有限公司 | Annotate wrong test fixture |
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