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CN-121985286-A - Automatic positioning direction finding method and device based on AISG interface transmission

CN121985286ACN 121985286 ACN121985286 ACN 121985286ACN-121985286-A

Abstract

The invention discloses an automatic positioning direction finding method and device based on AISG interface transmission, comprising the following steps of S1, device composition and deployment, S2, parasitic power supply, S3, multisource data collaborative collection, S4, data preprocessing and precision optimization, S5, cloud-edge collaborative positioning resolving, S6, AISG interface time division multiplexing transmission, S7, automatic data application and abnormal alarming, wherein an adhesive structure is utilized through a flexible shell, an antenna is not required to be transformed, a fixing device can be quickly attached to a base station antenna backboard, an LDO voltage stabilizing module multiplexes an RRU interface and is matched with a super capacitor to prevent power failure, data is subjected to temperature drift compensation and Kalman filtering to improve direction finding precision, RTK resolving of CORS data is combined to ensure positioning accuracy, a multisystem collaborative stable output data is not influenced by an AISG time division multiplexing link, automatic input and abnormal alarming are realized by a seamless interfacing base station system, and automatic operation and maintenance are adapted.

Inventors

  • XU ZHANGSHENG
  • YU WENJUAN
  • ZHANG JIE

Assignees

  • 安徽电信规划设计有限责任公司

Dates

Publication Date
20260505
Application Date
20260119

Claims (10)

  1. 1. An automatic positioning direction finding method based on AISG interface transmission is characterized by comprising the following steps: The device comprises an IMU, a temperature sensor, a GNSS positioning module, an MCU main control module, an LDO voltage stabilizing module and an AISG communication module, wherein the IMU, the temperature sensor, the GNSS positioning module, the MCU main control module, the LDO voltage stabilizing module and the AISG communication module are integrally arranged on a base station antenna backboard, and a conformal dual-frequency GNSS antenna of the GNSS positioning module is stuck and fixed along the center line of the base station antenna backboard to enable an arrow of the device to point to the front of the antenna; S2, parasitic power supply, namely inserting an 8PIN male head of the device into an RRU power adjustment port arranged close to a base station antenna, and simultaneously connecting an original feeder line of the built-in RCU of the base station antenna into the 8PIN female head of the device; S3, multi-source data collaborative collection, namely collecting antenna azimuth angle variation, antenna inclination data, environment temperature data and positioning original data through a device after power is supplied through S2, and forming a multi-dimensional original data source; s4, data preprocessing and precision optimization, namely, the MCU main control module receives the multi-dimensional original data acquired in the step 3, adopts a 3-order polynomial temperature drift compensation algorithm, corrects zero offset errors of the three-axis MEMS gyroscope and the three-axis MEMS accelerometer in the IMU according to the environmental temperature data, fuses azimuth angle variation of the three-axis MEMS gyroscope and inclination data of the three-axis MEMS accelerometer through a Kalman filtering algorithm, and finally outputs direction-finding data comprising azimuth angles and downward inclination angles; S5, cloud-edge co-location calculation, namely, a GNSS positioning module firstly receives correction data issued by a CORS network, then carries out error correction on positioning original data acquired in the S3 and the correction data, then carries out calculation on positioning data subjected to error correction, and outputs positioning data after processing; S6, AISG interface time division multiplexing transmission, namely, an AISG communication module normally keeps the links of the RRU and the RCU straight-through, when an RRU instruction is received, the AISG communication module is switched to the communication link of the device and the RRU, an MCU main control module integrates the direction-finding data output by S4 and the processed positioning data output by S5, packages the direction-finding data into an AISG protocol frame and returns the AISG protocol frame to the RRU through the switched link, and an analog switch immediately restores the original links of the RRU and the RCU after the transmission is completed; And S7, automatically applying data and alarming abnormality, namely, the RRU thoroughly transmits the AISG protocol frame received in the S6 to a background network manager, the network manager extracts data and automatically writes the data into a base station resource management system, and the background system compares the extracted current parameters with a reference value of factory calibration of the S1 device in real time, and automatically triggers an alarming work order and pushes the alarming work order to an operation and maintenance management system when abnormality is detected.
  2. 2. The automatic positioning and direction finding method based on AISG interface transmission as claimed in claim 1, wherein in S1, each component in the device is specifically: the IMU comprises a triaxial MEMS gyroscope for acquiring azimuth angle variation and a triaxial MEMS accelerometer for acquiring inclination data; The temperature sensor is an NTC temperature sensor for collecting the ambient temperature; The GNSS positioning module consists of a conformal dual-frequency GNSS antenna, a dual-frequency GNSS chip, an RTK engine and a feed lightning protection circuit and is used for receiving satellite signals and outputting positioning data; The MCU main control module is a microprocessor for data operation and storage; The input end of the LDO voltage stabilizing module is connected with 13V input voltage provided by an idle PIN2 PIN of an RRU electric regulating port through an 8PIN male head of the device, and the output end of the LDO voltage stabilizing module outputs 3.3V stabilizing voltage to supply power for each module; the AISG communication module is integrated with an AISG protocol processor and is responsible for normally keeping the RRU and the RCU to be directly communicated, switching the communication link after receiving the instruction and returning data; The components are arranged on a flexible shell with an adhesive structure on the back, so that the device can be adhered to a base station antenna backboard, and a 1mm polyurethane foam isolation layer is reserved on the joint side of a conformal dual-frequency GNSS antenna and the base station antenna; All parts in the device need to be subjected to factory calibration mechanism operation before factory delivery: The first step, fixing the device on an angle calibration table, setting the azimuth angle of the calibration table to be 0 degrees, setting the downward inclination angle to be 0 degrees, collecting sensor output values at different temperatures, and fitting to obtain a 3-order polynomial temperature drift compensation coefficient: wherein In order to be at the temperature of the environment, Fitting coefficients; Second, the device is placed in a GNSS calibration field, and the longitude of the calibration field is recorded Latitude and longitude Elevation of the building Azimuth reference at this time of synchronous recording device Reference of declination angle ; And finally, writing the coefficients and the reference value into a Flash memory of the MCU main control module.
  3. 3. The automatic positioning and direction-finding method based on AISG interface transmission as claimed in claim 1, wherein in S2, the device is required to be subjected to power supply conversion and voltage stabilization when power supply is obtained: the RRU electric regulating port outputs 13V DC voltage Inputting the voltage to an LDO voltage stabilizing module, and converting the voltage by a voltage dividing circuit: wherein 、 Is an LDO voltage dividing resistor.
  4. 4. The automatic positioning and direction finding method based on AISG interface transmission as claimed in claim 1, wherein in S3, the multi-dimensional original data source comprises: Azimuth variation original value acquired by triaxial MEMS gyroscope ; Antenna inclination data original value acquired by triaxial MEMS acceleration ; Ambient temperature data collected by a temperature sensor ; Pseudo-range original value acquired by conformal dual-frequency GNSS antenna Original value of carrier phase 。
  5. 5. The automatic positioning and direction-finding method based on AISG interface transmission as claimed in claim 1, wherein in S4, the zero offset error correction of the triaxial MEMS gyroscope and the triaxial MEMS accelerometer comprises the following steps: First, the temperature is increased Substituting a 3-order polynomial temperature drift compensation formula, and calculating the sensor zero offset at the current temperature: ; And correcting the original data by using the zero offset: Wherein, the In order to correct the amount of change in the rear direction angle, For the corrected x-axis acceleration component; And then will be The final output includes azimuth angle through Kalman filtering algorithm fusion And declination angle Is determined by the direction finding data of (a): firstly, constructing a state equation of Kalman filtering: Wherein, the For the azimuth angle of the previous moment, the initial value is ; Gravitational acceleration; is process noise; then constructing an observation equation, and executing the steps of prediction and updating: Wherein, the 、 In order to observe the value of the value, 、 To observe noise, output optimal direction-finding data 。
  6. 6. The automatic positioning and direction-finding method based on AISG interface transmission as claimed in claim 1, wherein in S5, correction data issued by CORS network comprises satellite clock error Track error To combine it with the original value of pseudo-range Substituting an error correction formula to eliminate satellite-side system errors: Providing satellite error data through a CORS network, correcting the systematic deviation of the GNSS original pseudo range, and outputting the corrected pseudo range 。
  7. 7. The automatic positioning and direction-finding method based on AISG interface transmission as claimed in claim 1, wherein in S5, the corrected pseudo-range is corrected Satellite coordinates provided by satellite ephemeris Firstly substituting RTK carrier phase difference formula to calculate earth center earth fixed coordinates of antenna : Wherein, the In order to achieve the light velocity, the light beam is, Clock skew for the receiver; And then converting the geocentric geodetic coordinates into geodetic coordinates: Wherein, the Is the equatorial radius of the earth, positioning data, longitude Latitude and longitude Elevation of the building 。
  8. 8. The automatic positioning and direction finding method based on AISG interface transmission as claimed in claim 1, wherein in S6, the data integrated by the MCU main control module comprises: The direction-finding data is firstly used And positioning data And packaging the frame into 32byte frames according to an AISG 2.0 protocol format, wherein the frame head is 2byte, the data section is 28byte and the check bit is 2byte, and then transmitting the protocol frames back to the RRU through the switched link, and recovering the RRU and the RCU link after the transmission is completed.
  9. 9. The automatic positioning direction finding method based on AISG interface transmission as claimed in claim 1, wherein in S7, the background network manager matches AISG protocol format extraction through a special analysis module Converting the binary protocol frame into applicable structured data, and writing the data into a structured database of a base station resource management system; the detection mechanism of the abnormal alarm is as follows: Will be And (3) with Substituting the abnormal judgment formula, and triggering an alarm when any one item is satisfied: And judging whether the antenna state is abnormal or not through the deviation threshold value of the real-time data and the factory reference value, and pushing the antenna state to an alarm work order of the operation and maintenance system.
  10. 10. An automatic device based on AISG interface transmission is characterized by comprising a flexible shell, and an IMU, a temperature sensor, a GNSS positioning module, an MCU main control module, an LDO voltage stabilizing module and an AISG communication module which are arranged on the flexible shell; the thickness of the flexible shell is less than or equal to 1.5mm, the weight is less than or equal to 25g, the back of the back is provided with a sticky structure; The IMU comprises a triaxial MEMS gyroscope and a triaxial MEMS accelerometer, wherein the triaxial MEMS gyroscope has a measuring range of +/-250 degrees/s and a sampling frequency of 100Hz, and the triaxial MEMS accelerometer has a measuring range of +/-2 g and a sampling frequency of 100Hz; the temperature sensor is NTC, and the sampling frequency is 1Hz; The GNSS positioning module supports GPSL1+L5 and Beidou B1I+B2a frequency bands, has a sampling frequency of 1Hz and consists of a conformal dual-frequency GNSS antenna, a dual-frequency GNSS chip, an RTK engine and a feed lightning protection circuit; the MCU main control module is an STM32F407 microprocessor, and is respectively and electrically connected with the IMU, the temperature sensor, the GNSS positioning module and the AISG communication module, and is also internally provided with a Flash memory for storing a compensation coefficient and a parameter reference value of factory calibration; the input end of the LDO voltage stabilizing module is connected with 13V input voltage provided by an idle PIN2 PIN of an RRU power regulation port through an 8PIN male head of the device, the output end outputs 3.3V stable voltage for supplying power to each module, and the LDO voltage stabilizing module is connected with a 2.7V/0.22F super capacitor in parallel and is used for ensuring that the device is not powered down when the RRU is restarted; the AISG communication module is an AISG 2.0/v3.0 protocol communication module.

Description

Automatic positioning direction finding method and device based on AISG interface transmission Technical Field The invention relates to the technical field of operation and maintenance of mobile communication base stations, in particular to an automatic positioning and direction finding method and device based on AISG interface transmission. Background The coverage area of the current mobile communication network is continuously enlarged, the base station antenna is used as a core component for receiving and transmitting network signals, the azimuth angle, the downward inclination angle and the accuracy of the installation position of the base station antenna directly determine the coverage quality of regional signals, the operation and maintenance links of the base station need to perform normalized monitoring on the parameters of the antenna in order to ensure the stable operation of the network, devices aiming at the base station antenna are already arranged in the prior art, but the devices still need to be optimized according to the requirements of the actual operation scene of the base station in the aspects of deployment suitability, operation stability, operation and maintenance system compatibility and the like: In the actual deployment scene of the base station antenna, the forms of base station antenna back plates of different manufacturers and different models are obviously different, the traditional base station antenna device mostly adopts a rigid shell structure, and the traditional base station antenna device usually needs to carry out perforation, support mounting and other reconstruction operations on the antenna back plate during installation, so that the deployment man-hour is increased, the original structure of the antenna can be possibly damaged; The base station antenna is in an outdoor complex running environment, the power supply of the traditional device depends on an independent power module, additional wiring connection is needed, and the wiring difficulty is high and the traditional device is easily interfered by the environment in outdoor base station scenes such as mountain areas, suburbs and the like; in addition, the output data of the built-in IMU of the device is easy to be influenced by the ambient temperature to generate zero offset error, the traditional processing mode does not accurately compensate for the error, and meanwhile, the fusion algorithm of the direction finding data has insufficient precision, so that the deviation of the direction finding result is larger, and reliable monitoring parameters cannot be stably output; In the existing operation and maintenance system of the base station, the RRU and the built-in RCU of the antenna realize the core functions such as electric downtilt adjustment and the like through a special link, the communication link of the traditional device has poor compatibility with the existing link, if the traditional device is directly accessed to easily occupy the original link resources, the electric downtilt adjustment function of the RCU cannot be normally used; therefore, it is necessary to design an automatic positioning direction-finding method and device based on AISG interface transmission. Disclosure of Invention The invention aims to provide an automatic positioning direction-finding method and device based on AISG interface transmission, which are used for solving the problems that the conventional device provided in the background art has poor adaptability of a rigid structure, a base station antenna is required to be modified during deployment, the degree of fit with an antenna backboard is low, a base station is easy to be influenced by shielding signals, normal communication of the base station is easy to be influenced by device power supply, independent modules or wiring difficulty is high, data acquisition is easy to be interrupted due to outage during restarting of an RRU, meanwhile, the reliability of direction-finding and positioning parameters is low due to inaccurate compensation of temperature drift errors of the IMU, the data fusion and positioning resolving precision are insufficient, the compatibility of a device communication link and an original RRU-RCU link of the base station is easy to influence the downward inclination angle adjusting function, and the data format, the base station resource tube and operation and maintenance system are easy to be insufficient, and conversion equipment is required to be additionally configured, so that the operation and maintenance cost is increased, the data real-time is reduced, and the automatic warehouse entry and abnormal timely alarm of monitoring data cannot be realized. In order to achieve the above purpose, the present invention provides the following technical solutions: In a first aspect, an automatic positioning direction finding method based on AISG interface transmission is provided, including the following steps: The device comprises an IMU, a temperatu