WO2021227462A1

WO2021227462A1 - Beidou data processing method and apparatus based on blockchain

Info

Publication number: WO2021227462A1
Application number: PCT/CN2020/134224
Authority: WO
Inventors: 张元刚; 冯建
Original assignee: 北斗天地股份有限公司
Priority date: 2020-05-13
Filing date: 2020-12-07
Publication date: 2021-11-18
Also published as: CN113668584A

Abstract

Provided are a Beidou data processing method and apparatus based on a blockchain. In the method and apparatus, data of a reference station is stored by means of a data chain. A verification code is generated for each data packet in the data chain, and each verification code is generated on the basis of the verification code of a previous data packet. Thus, after data of one data packet is tampered with, an error occurs in the verification code of each of the following data packets. By means of this checking method, the possibility of tampering with data packets is greatly reduced, thereby ensuring the security of data storage.

Description

Beidou data processing method and device based on blockchain

Technical field

The present disclosure relates to the field of satellite navigation, and in particular to a Beidou data processing method and device based on blockchain.

Background technique

Satellite navigation system is an important space information infrastructure. In 2000, my country first built the Beidou navigation test system, making my country the third country in the world with an autonomous satellite navigation system after the United States and Russia. The system has been successfully applied in many fields such as surveying and mapping, telecommunications, water conservancy, fishery, transportation, forest fire prevention, disaster reduction and relief, and public safety, and has produced significant economic and social benefits.

The principle of satellite navigation: The distance measurement between the satellite and the user is based on the difference between the transmission time of the satellite signal and the time it reaches the receiver, which is called pseudorange. In order to calculate the user's three-dimensional position and the receiver clock deviation, pseudorange measurement requires at least receiving signals from multiple satellites.

Due to the errors in the orbit of the satellite and the satellite clock, and the influence of the atmospheric troposphere and ionosphere on the signal, the positioning accuracy for civilian use is only on the order of tens of meters. In order to improve the positioning accuracy, differential positioning technology is generally used to establish ground reference stations for satellite observations, and use the known precise coordinates of the reference stations to compare with the observed values to obtain a correction number and release it to the outside world. After the receiver receives the correction number, it compares with its own observations, eliminates most of the errors, and obtains a more accurate position. Experiments show that using differential positioning technology, the positioning accuracy can be improved to the meter level.

In the Beidou system, ground reference stations are also used. And promulgated the "Beidou Ground-based Augmentation System Base Station Data Storage and Output Requirements" as the data storage standard for ground reference stations. The standard specifies the number of days that data needs to be stored and the format of data storage, but there is no record of the way the data is stored.

Regarding how these data can be stored more securely and prevented from being tampered with, there is no relevant technical solution disclosed in the prior art.

Summary of the invention

The embodiments of the present disclosure provide a blockchain-based Beidou data processing method and device, which can solve the problem of how to make reference station data more securely stored.

According to a first aspect of the embodiments of the present disclosure, there is provided a Beidou data processing method based on blockchain, the method comprising: obtaining a code of a reference station, wherein the code is used to uniquely identify the reference station; The data that the reference station needs to save, and compress the data into N data packets according to the generation time of the data, wherein each data packet includes all the data in a predetermined time period, and N is a natural number greater than 1. Obtain the first data packet numbered 1, and generate a first verification code according to the first data packet, wherein the first verification code is one-to-one corresponding to the first data packet; Obtain the second data Package, generating the second verification code according to the second data packet and the first verification code, and so on, obtaining the Nth data packet, and generating the Nth verification code according to the Nth data packet and the N-1th verification code ; Save the N data packets and their corresponding verification codes in the order of the data packets to generate a data link; use the time period of the N data packets and the code of the reference station as the name of the data link.

Further, the method further includes: numbering each data packet in chronological order, and naming each data packet respectively, wherein the name of each data packet includes the predetermined value of the data packet The time period, the code of the reference station and the number of the data packet.

Further, the predetermined time period is days, and each data packet corresponds to data of different days.

Further, compressing the data into N data packets according to the generation time of the data includes: acquiring the type of the reference station; acquiring, according to the type of the reference station, the data that needs to be saved by the corresponding reference station of the type. The number of days, and the number of days is used as the N value.

Further, the type of the reference station is: a frame reference station, a monitoring station or a regional reference station.

According to a second aspect of the embodiments of the present disclosure, there is provided a Beidou data processing device based on blockchain. The device includes: an acquisition module for acquiring a code of a reference station, wherein the code is used to uniquely identify the Reference station; a first generation module, used to obtain the data that the reference station needs to save, and compress the data into N data packets according to the generation time of the data, where each data packet includes a predetermined time For all data in the segment, N is a natural number greater than 1. The second generation module is used to obtain the first data packet numbered 1, and generate a first verification code according to the first data packet, where the first The verification code has a one-to-one correspondence with the first data packet; the third generation module is used to obtain a second data packet, and generate the second verification code according to the second data packet and the first verification code, and so on , Acquire the Nth data packet, and generate the Nth verification code according to the Nth data packet and the N-1th verification code; the fourth generation module is used to store the N data packets and their corresponding The verification code is used to generate the data link; the naming module is used to use the time period of the N data packet and the code of the reference station as the name of the data link.

Further, the naming module is further used for: numbering each data packet in chronological order, and naming each data packet separately, wherein the name of each data packet includes the data packet The predetermined period of time, the code of the reference station and the number of the data packet.

Further, the first generating module is configured to: obtain the type of the reference station; obtain, according to the type of the reference station, the number of days required to save data for the corresponding reference station of the type, and use the number of days as the N value.

Through the above method and device, the data link method is adopted to save the data of the reference station. Since each data packet in the data chain has a verification code, each verification code is generated based on the verification code of the previous data packet . In this way, after the data of a data packet is tampered with, the verification code of the subsequent data packets will all have errors. This verification method greatly reduces the possibility of tampering of the data packet and ensures the security of data storage.

It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure.

Description of the drawings

The drawings herein are incorporated into the specification and constitute a part of the specification, show embodiments consistent with the disclosure, and are used together with the specification to explain the principle of the disclosure.

FIG. 1 is a flowchart of a Beidou data processing method based on blockchain according to an embodiment of the present disclosure;

Fig. 2 is a schematic diagram of a logical layer structure of a blockchain-based Beidou data processing device provided by an embodiment of the present disclosure.

Detailed ways

The exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

The embodiment of the present disclosure provides a data transmission method. As shown in FIG. 1, the blockchain-based Beidou data processing method includes the following steps:

101. Obtain the code of the base station, where the code is used to uniquely identify the base station;

102. Obtain data that the reference station needs to save, and compress the data into N data packets according to the generation time of the data, where each data packet includes all data in a predetermined time period, and N is a natural number greater than 1.

103. Obtain a first data packet numbered 1, and generate a first verification code according to the first data packet, where the first verification code corresponds to the first data packet one-to-one;

104. Obtain a second data packet, generate a second verification code according to the second data packet and the first verification code, and so on, obtain the Nth data packet, and generate the Nth verification code according to the Nth data packet and the N-1th verification code ；

105. Save N data packets and their corresponding verification codes in the order of the data packets to generate a data link;

106. Use the time period of the N data packet and the code of the reference station as the name of the data link.

Through the above steps, the data link method is adopted to save the data of the reference station. Since each data packet in the data chain has a verification code, each verification code is generated based on the verification code of the previous data packet. In this way, after the data of a data packet is tampered with, the verification code of the subsequent data packets will all have errors. This verification method greatly reduces the possibility of tampering of the data packet and ensures the safety of data storage.

As a safer way, the data link on one base station can be backed up to multiple other base stations.

In this way, even if the data of a base station is tampered with, because other base stations still have data backed up, it is possible to discover which data has been tampered with.

For example, a reference station can obtain other adjacent reference stations within a predetermined range from the server through the server, and periodically back up its own data link to other reference stations through the server.

Alternatively, the base station can back up its data link to other base stations that do not belong to the same area as the base station through the server, for example, back up to base stations in other provinces. This processing method will make data backup very safe. For example, when a natural disaster occurs in a certain area, the data is backed up in other provinces at this time, which ensures the security of the data.

As an optional implementation manner, the method further includes: numbering each data packet in chronological order, and naming each data packet separately, wherein the name of each data packet includes the predetermined time period of the data packet , The code of the base station and the number of the data packet.

In this alternative embodiment, the retrieval of the data package can be made more convenient by naming the data package.

As an optional implementation manner, the predetermined time period is days, and each data packet corresponds to data of different days.

As an optional implementation manner, compressing the data into N data packets according to the generation time of the data includes: obtaining the type of the reference station; obtaining the number of days required to save the data for the corresponding reference station of the type according to the type of the reference station, Use the number of days as the N value.

For example, if a base station requires 30 days to save data, the data of the first day can be used as the first data packet, the data of the second day can be used as the second data packet, and so on. The data of the day is regarded as the thirtieth data packet. Think of these thirty data packets as one data link.

Such a reference station can store multiple data links, and these multiple data links can also be stored according to certain rules. For example, to save 12 data links in a year as a larger data link, the method of generating a larger data link may include the following steps:

Obtain the first data link in chronological order, and generate a first verification code according to the first data link, where the first verification code corresponds to the first data link one-to-one;

Obtain the second data link, generate the second verification code according to the second data link and the first verification code, and so on, obtain the Nth data link, and generate the Nth data link according to the Nth data link and the N-1th verification code Data link

Save N data links and their corresponding verification codes in the order of the data links to generate a new data link.

This storage method can make data storage more secure.

The above method can be applied to the Beidou system. In the Beidou system, the types of reference stations are: frame reference stations, monitoring stations or regional reference stations. The following describes the data stored in these base stations.

Frame base station

The main storage data of the frame reference station are: BDS (B1/B2/B3), GPS (L1/L2/L5), GLONASS (L1/L2) and other navigation systems' raw observation data, station information, and meteorological data. These data include:

a) Original observation data: including code pseudorange, signal-to-noise ratio, carrier phase value, Doppler frequency shift, satellite broadcast ephemeris, etc.;

b) Site information: including site name, coordinates, antenna information, etc.;

c) Meteorological data: including temperature, humidity, pressure data, collection time, etc. of the meteorological instrument.

Monitoring station

The main storage data are: BDS (B1/B2/B3), GPS (L1/L2/L5), GLONASS (L1/L2) and other navigation system's original observation data, station information, positioning results, differential data products. These data include:

c) Positioning results: including single-frequency pseudorange difference, dual-frequency carrier phase difference, single-frequency carrier phase difference positioning results, etc.;

d) Differential data products: including wide-area enhanced data products, regional differential data products, etc.

Regional reference station

The stored data are mainly: the original observation data and station information of navigation systems such as BDS (B1/B2/B3), GPS (L1/L2/L5), GLONASS (L1/L2). These data include:

b) Site information: including site name, coordinates, antenna information, etc.

Different types of base stations may have different requirements for the amount of data to be saved. The type of base station can be obtained, and the pre-configured requirements for the amount of data to be saved corresponding to this type can be obtained. According to the time requirement, the data link is generated.

There are many different types of data in a data package. At this time, the data can be compressed into compressed packages according to the types. For example, for a frame reference station, three compressed packages can be generated according to the original observation data, site information, and meteorological data. . The data package includes the contents of these three compressed packages. Preferably, a hash algorithm is used for each compressed package to obtain the check value of the compressed package, and then the three compressed packages and the three check values are hashed together to obtain the verification code of one data packet.

Based on the Blockchain-based Beidou data processing method described in the above-mentioned embodiment corresponding to FIG. 1, the following are device embodiments of the disclosure, which can be used to execute the method embodiments of the disclosure. The content that has been described in the above method embodiment will not be repeated here.

The embodiment of the present disclosure provides a Beidou data processing device based on blockchain. As shown in FIG. 2, the device 20 includes:

The obtaining module 201 is used to obtain the code of the base station, where the code is used to uniquely identify the base station;

The first generation module 202 is used to obtain the data that the reference station needs to save, and compress the data into N data packets according to the generation time of the data, wherein each data packet includes all data in a predetermined time period, N is a natural number greater than 1;

The second generating module 203 is configured to obtain the first data packet numbered 1, and generate a first verification code according to the first data packet, where the first verification code corresponds to the first data packet one-to-one;

The third generation module 204 is configured to obtain the second data packet, generate the second verification code according to the second data packet and the first verification code, and so on, obtain the Nth data packet, and verify according to the Nth data packet and the N-1th Code to generate the Nth verification code;

The fourth generation module 205 is configured to store N data packets and their corresponding verification codes in the order of the data packets to generate a data link;

The naming module 206 is used to use the time period of the N data packet and the code of the reference station as the name of the data link.

As an optional implementation manner, the naming module 206 is further configured to: number each data packet in chronological order, and name each data packet separately, wherein the name of each data packet includes the data packet's name The predetermined time period, the code of the base station, and the number of the data packet.

As an optional implementation manner, the first generation module 202 is configured to: obtain the type of the reference station; obtain, according to the type of the reference station, the number of days required to save data for the corresponding reference station of the type, and use the number of days as the N value.

As an optional implementation manner, the type of reference station is: frame reference station, monitoring station or regional reference station.

Based on the method described in the embodiment corresponding to FIG. 1, the embodiment of the present disclosure also provides a computer-readable storage medium. For example, the non-transitory computer-readable storage medium may be a read-only memory (English: Read Only Memory, ROM), random access memory (English: Random Access Memory, RAM), CD-ROM, magnetic tape, floppy disk and optical data storage device, etc. The storage medium stores computer instructions for executing the data transmission method described in the above-mentioned embodiment corresponding to FIG. 1, which will not be repeated here.

Those skilled in the art will easily think of other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptive changes of the present disclosure. These variations, uses, or adaptive changes follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field that are not disclosed in the present disclosure. . The description and the embodiments are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are pointed out by the following claims.

It should be understood that the present disclosure is not limited to the precise structure that has been described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

A blockchain-based Beidou data processing method, characterized in that, the method includes:

Acquiring a code of a reference station, where the code is used to uniquely identify the reference station;

Obtain the data that the reference station needs to save, and compress the data into N data packets according to the generation time of the data, where each data packet includes all the data in a predetermined time period, and N is greater than 1. Natural number

Acquiring a first data packet numbered 1, and generating a first verification code according to the first data packet, wherein the first verification code corresponds to the first data packet one-to-one;

Obtain a second data packet, generate the second verification code according to the second data packet and the first verification code, and so on, obtain the Nth data packet, and generate it based on the Nth data packet and the N-1th verification code Nth verification code;

Save the N data packets and their corresponding verification codes in the order of the data packets to generate a data link;

The time period of the N data packet and the code of the reference station are used as the name of the data link.
The method according to claim 1, wherein the method further comprises:

Number each data packet in chronological order, and name each data packet separately, wherein the name of each data packet includes the predetermined time period of the data packet and the code of the reference station And the number of the data packet.
The method according to claim 1 or 2, wherein the predetermined time period is days, and each data packet corresponds to data of different days.
The method according to claim 1 or 3, wherein compressing the data into N data packets according to the generation time of the data comprises:

Acquiring the type of the reference station;

According to the type of the reference station, the number of days required to save data for the corresponding reference station of the type is acquired, and the number of days is used as the N value.
The method according to claim 4, wherein the type of the reference station is: a frame reference station, a monitoring station or a regional reference station.
A Beidou data processing device based on blockchain, characterized in that the device comprises:

An acquisition module for acquiring a code of a reference station, where the code is used to uniquely identify the reference station;

The first generation module is used to obtain the data that the reference station needs to save, and compress the data into N data packets according to the generation time of the data, wherein each data packet includes the data in the predetermined time period For all data, N is a natural number greater than 1;

The second generation module is configured to obtain the first data packet numbered 1 and generate a first verification code according to the first data packet, wherein the first verification code corresponds to the first data packet one-to-one of;

The third generation module is configured to obtain a second data packet, generate the second verification code according to the second data packet and the first verification code, and so on, obtain the Nth data packet, and obtain the Nth data packet according to the Nth data packet and the first verification code. The N-1th verification code generates the Nth verification code;

The fourth generation module is configured to store the N data packets and their corresponding verification codes in the order of the data packets to generate a data link;

The naming module is used to use the time period of the N data packet and the code of the reference station as the name of the data link.
The device according to claim 6, wherein the naming module is further used for:

Number each data packet in chronological order, and name each data packet separately, wherein the name of each data packet includes the predetermined time period of the data packet and the code of the reference station And the number of the data packet.
The device according to claim 6 or 7, wherein the predetermined time period is days, and each data packet corresponds to data of different days.
The device according to claim 6 or 8, wherein the first generating module is configured to:

Acquiring the type of the reference station;

According to the type of the reference station, the number of days required to save data for the corresponding reference station of the type is acquired, and the number of days is used as the N value.
The device according to claim 9, wherein the type of the reference station is: a frame reference station, a monitoring station or a regional reference station.