CN114185865A - Large-scale base station data storage and analysis method and system based on distributed storage - Google Patents
Large-scale base station data storage and analysis method and system based on distributed storage Download PDFInfo
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Abstract
The invention discloses a large-scale base station data storage and analysis method based on distributed storage, which comprises the steps of storing base station data, storing streaming base station data in a distributed storage system according to a base station and time; base station data conversion, merging base station data small files in the distributed storage system, calling a C + + dynamic library of RTKLIB by using a JAVA local calling technology, converting an RTCM format file into a RINEX format file, and uploading the RINEX format file to the HDFS distributed storage system and the MinIO shared storage system for storage; and analyzing the base station data, receiving the messages in the message queue, analyzing the message content, calling a SHELL analysis script, downloading a RINEX file, calling GNSS data preprocessing software to analyze the RINEX file, outputting an analysis result and storing the analysis result into a database. The invention solves the problems of poor expansibility of a base station data storage level and low data conversion efficiency.
Description
Technical Field
The invention relates to the field of base station data processing, in particular to a large-scale base station data storage and analysis method and system based on distributed storage.
Background
Today in the information era, data scales of various industries are increased explosively, big data is a new data processing mode, and the big data has stronger decision-making power, insight discovery power and circulation optimization capability to adapt to massive, high-growth rate and diversified information assets. The strategic significance of the big data is not only the management of mass data, but also the specialized processing of the mass significant data, the exploration of data value and the growth of data-driven enterprises. The mainstream big data technology in the market at present is a series of technical systems related to functions of acquisition, storage, calculation, query, resource management and the like based on a Hadoop ecosphere. The following are several more important technical frameworks:
HDFS (Hadoop Distributed File System) is the basis for data storage management in the Hadoop System. It is a highly fault tolerant system that can detect and cope with hardware faults for running on low cost general purpose hardware. YARN is the latest resource management system of Hadoop. Multiple jobs responsible for multiple applications may run simultaneously.
Spark and Flink are two general distributed data calculation engines, and can perform data streaming processing and batch processing, the difference is that Spark pays more attention to batch processing, and meanwhile, stream processing is regarded as special batch processing, and the concept of Flink is a concept of stream-batch integration, so that real streaming processing can be realized.
Big data is applied to maps more and more widely, and generally relates to high-precision maps and high-precision positioning. The high-precision map is a popular electronic map with higher precision and more data dimensions, can provide over-the-horizon road conditions, lane lines in roads, traffic signs and environmental information for vehicle perception, helps an automatic driving automobile to realize lane-level planning decision, realizes high-precision local positioning in a map matching mode, and reduces the dependence of automatic driving on expensive sensors. High-precision positioning is carried out, and various high-precision positioning methods are adopted in the automatic driving industry according to different requirements of scenes and positioning performance. In most car networking application scenarios, it is usually necessary to realize accurate positioning through fusion of multiple technologies, including gnss (global Navigation Satellite system), radio (e.g., cellular network, local area network, etc.), RTK (Real-time Kinematic), Inertial Measurement Unit (IMU), and sensor. Among them, the most widely used positioning method is the fusion GNSS/RTK & IMU. The GNSS/RTK positioning precision is high, centimeter-level precision can be achieved under dynamic measurement, the problem of accumulative error does not exist, the positioning updating frequency is low, and signals are easily shielded; the IMU update frequency is high, but there is an accumulative error problem. The method combines the two to realize advantage complementation, uses IMU to accumulate displacement and direction variables in a GNSS/RTK positioning interval, and a user receiver receives a correction number sent by a reference station while carrying out GNSS observation and corrects the positioning result, thereby improving the positioning precision and realizing the real-time positioning with low delay, high precision and high frequency.
The high-precision map is combined with a high-precision positioning technology to solve the difficulty of perception and application level. On the perception level, when the automatic driving reaches L3 or above, the requirements on precision and stability are higher and higher. In extreme scenarios such as inclement weather, the cognitive perception of lidar and vision sensors may be affected. The high-precision map simultaneously contains real-time road condition information and an original 3D model, the problem that a sensor is not suitable in rainy, snowy and foggy weather in a sensing link can be solved, geographic data are corrected in an interactive decision link, accuracy is improved, the number of vehicle-mounted sensors is greatly reduced, and the cost of the whole vehicle is reduced.
But now most of the storage of base station data is based on traditional database technology or hard disk. The defects are that the storage level expansibility is poor, the data is highly available and the safety is not high; the conversion of the original data of the base station is a basic dynamic library based on C + + at present, no packaging and distributed management is carried out, and the execution efficiency and reliability are ensured to be low; at present, a lot of software is available on the market for analyzing data quality monitoring in base station data integrity monitoring, but the software belongs to manually executed application programs, the automation degree is not high, and the software is not suitable for a large-scale high-precision positioning platform.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problems of poor expansibility of a base station data storage level and low data conversion efficiency, the invention provides a large-scale base station data storage and analysis method and system based on distributed storage.
The technical scheme is as follows: a large-scale base station data storage and analysis method based on distributed storage comprises the following steps:
(1) storing base station data, namely storing streaming base station data in a distributed storage system according to a base station and time;
(2) base station data conversion, merging base station data small files in the distributed storage system, calling a C + + dynamic library of RTKLIB by using a JAVA local calling technology, converting an RTCM format file into a RINEX format file, and uploading the RINEX format file to the HDFS distributed storage system and the MinIO shared storage system for storage;
(3) and analyzing the base station data, receiving the messages in the message queue, analyzing the message content, calling a SHELL analysis script, downloading a RINEX file, calling GNSS data preprocessing software to analyze the RINEX file to obtain the availability of the base station data, the cycle slip ratio of the base station data and the multi-path numerical value of the frequency dividing point of the base station, and storing the analysis result into a database.
And the streaming base station data adopts a Flink streaming calculation engine.
The distributed storage system is an HDFS distributed storage system.
The message queue adopts a Kafka distributed publishing and subscribing message system.
A large-scale base station data storage and analysis system based on distributed storage comprises:
(1) a base station data storage module: storing streaming base station data in a distributed storage system according to base stations and time;
(2) a base station data conversion module: merging the small files of the base station data in the distributed storage system, calling a C + + dynamic library of RTKLIB by using a JAVA local calling technology, converting the RTCM format file into a RINEX format file, and uploading the RINEX format file to the HDFS distributed storage system and the MinIO shared storage system for storage;
(3) a base station data analysis module: receiving the message in the message queue, analyzing the message content, calling a SHELL analysis script, downloading a RINEX file, calling GNSS data preprocessing software to analyze the RINEX file, obtaining the availability of the base station data, the cycle slip ratio of the base station data and the multipath numerical value of the frequency dividing point of the base station, and storing the analysis result into a database.
And the streaming base station data adopts a Flink streaming calculation engine.
The distributed storage system is an HDFS distributed storage system.
The message queue adopts a Kafka distributed publishing and subscribing message system.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
1. for the problem of poor base station data storage level scalability: the storage of the base station data mainly adopts a distributed storage system HDFS, the storage system is based on Hadoop ecology, supports horizontal expansion, has a copy mechanism, can completely realize high availability of the data, and simultaneously can ensure the security and encryption of the data.
2. For the problem of conversion efficiency of base station data: firstly, calling a bottom layer C + + RTKLIB dynamic library by utilizing a JAVA JNI technology, and further packaging and carrying out distributed management in an upper layer JAVA program; meanwhile, parallel calling is carried out by using a Kafka message queue set distributed JAVA conversion program, so that the data of a plurality of base stations are converted at the same time, and the conversion efficiency is greatly improved.
3. The problem of poor automation of the analysis of the base station data is that: the execution program of the TEQC of the Linux version is packaged by the SHELL script, and the analysis script is called by using the Kafka message queue and the distributed JAVA program, so that the fully-automatic flow of data analysis is completely realized.
Drawings
Fig. 1 is a flowchart of a large-scale base station data storage and analysis method based on distributed storage.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
Example 1:
as shown in fig. 1, a large-scale base station data storage and analysis method based on distributed storage includes the following steps:
(1) storing base station data, namely storing streaming base station data in a distributed storage system according to a base station and time;
(2) base station data conversion, merging base station data small files in the distributed storage system, calling a C + + dynamic library of RTKLIB by using a JAVA local calling technology, converting an RTCM format file into a RINEX format file, and uploading the RINEX format file to the HDFS distributed storage system and the MinIO shared storage system for storage;
(3) and analyzing the base station data, receiving the messages in the message queue, analyzing the message content, calling a SHELL analysis script, downloading a RINEX file, calling GNSS data preprocessing software to analyze the RINEX file to obtain the availability of the base station data, the cycle slip ratio of the base station data and the multi-path numerical value of the frequency dividing point of the base station, and storing the analysis result into a database.
And the streaming base station data adopts a Flink streaming calculation engine.
The distributed storage system is an HDFS distributed storage system.
The message queue adopts a Kafka distributed publishing and subscribing message system.
Example 2:
a large-scale base station data storage and analysis system based on distributed storage comprises:
(1) a base station data storage module: storing streaming base station data in a distributed storage system according to base stations and time;
(2) a base station data conversion module: merging the small files of the base station data in the distributed storage system, calling a C + + dynamic library of RTKLIB by using a JAVA local calling technology, converting the RTCM format file into a RINEX format file, and uploading the RINEX format file to the HDFS distributed storage system and the MinIO shared storage system for storage;
(3) a base station data analysis module: receiving the message in the message queue, analyzing the message content, calling a SHELL analysis script, downloading a RINEX file, calling GNSS data preprocessing software to analyze the RINEX file, obtaining the availability of the base station data, the cycle slip ratio of the base station data and the multipath numerical value of the frequency dividing point of the base station, and storing the analysis result into a database.
And the streaming base station data adopts a Flink streaming calculation engine.
The distributed storage system is an HDFS distributed storage system.
The message queue adopts a Kafka distributed publishing and subscribing message system.
Claims (8)
1. A large-scale base station data storage and analysis method based on distributed storage is characterized by comprising the following steps:
(1) storing base station data, namely storing streaming base station data in a distributed storage system according to a base station and time;
(2) base station data conversion, merging base station data small files in the distributed storage system, calling a C + + dynamic library of RTKLIB by using a JAVA local calling technology, converting an RTCM format file into a RINEX format file, and uploading the RINEX format file to the HDFS distributed storage system and the MinIO shared storage system for storage;
(3) and analyzing the base station data, receiving the messages in the message queue, analyzing the message content, calling a SHELL analysis script, downloading a RINEX file, calling GNSS data preprocessing software to analyze the RINEX file to obtain the availability of the base station data, the cycle slip ratio of the base station data and the multi-path numerical value of the frequency dividing point of the base station, and storing the analysis result into a database.
2. The method for large-scale base station data storage and analysis based on distributed storage according to claim 1, wherein the streaming base station data adopts a Flink streaming calculation engine.
3. The method for large-scale base station data storage and resolution based on distributed storage according to claim 1, wherein the distributed storage system is an HDFS distributed storage system.
4. The distributed-storage-based large-scale base station data storage and analysis method according to claim 1, wherein the message queue adopts a Kafka distributed publish-subscribe message system.
5. A large-scale base station data storage and analysis system based on distributed storage is characterized by comprising:
(1) a base station data storage module: storing streaming base station data in a distributed storage system according to base stations and time;
(2) a base station data conversion module: merging the small files of the base station data in the distributed storage system, calling a C + + dynamic library of RTKLIB by using a JAVA local calling technology, converting the RTCM format file into a RINEX format file, and uploading the RINEX format file to the HDFS distributed storage system and the MinIO shared storage system for storage;
(3) a base station data analysis module: receiving the message in the message queue, analyzing the message content, calling a SHELL analysis script, downloading a RINEX file, calling GNSS data preprocessing software to analyze the RINEX file, obtaining the availability of the base station data, the cycle slip ratio of the base station data and the multipath numerical value of the frequency dividing point of the base station, and storing the analysis result into a database.
6. The system for large-scale base station data storage and resolution based on distributed storage according to claim 5, wherein said streaming base station data employs a Flink streaming computation engine.
7. The system for large-scale base station data storage and resolution based on distributed storage according to claim 5, wherein the distributed storage system is an HDFS distributed storage system.
8. The system for large-scale base station data storage and resolution based on distributed storage according to claim 5, wherein the message queue adopts a Kafka distributed publish-subscribe message system.
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| CN109710731A (en) * | 2018-11-19 | 2019-05-03 | 北京计算机技术及应用研究所 | A kind of multidirectional processing system of data flow based on Flink |
| CN111386477A (en) * | 2018-12-28 | 2020-07-07 | 深圳市大疆创新科技有限公司 | Observation data conversion method, equipment, movable platform and storage medium |
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Patent Citations (6)
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| CN105243160A (en) * | 2015-10-28 | 2016-01-13 | 西安美林数据技术股份有限公司 | Mass data-based distributed video processing system |
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| CN108318905A (en) * | 2018-01-05 | 2018-07-24 | 北京北方联星科技有限公司 | The method of sub_meter position and sub- rice positioning intelligent mobile phone are realized on smart mobile phone |
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