CN107707629B - GNSS message conversion verification method - Google Patents
GNSS message conversion verification method Download PDFInfo
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- CN107707629B CN107707629B CN201710820420.8A CN201710820420A CN107707629B CN 107707629 B CN107707629 B CN 107707629B CN 201710820420 A CN201710820420 A CN 201710820420A CN 107707629 B CN107707629 B CN 107707629B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/565—Conversion or adaptation of application format or content
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/12—Applying verification of the received information
Abstract
The invention provides a GNSS message conversion verification method, which is characterized by comprising the following steps: step S1, inputting the message to the unified message verification platform; step S2, the unified message verification platform detects the source of message output and processes correspondingly; step S3, the unified message verification platform detects whether the verification of the message is supported; step S4, if the unified message verification platform supports the verification of the message, it is detected whether the input file conforms to the format of the message, and the content integrity is verified; step S5, after the content integrity is verified, the message is converted into a uniform message format; and step S6, verifying the intermediate data format obtained by the message conversion, and outputting the verification result. The invention can eliminate the difference of each message, improve the accuracy and the usability of verification and verify the data of off-line files and real-time streams.
Description
Technical Field
The invention relates to the technical field of message verification, in particular to a GNSS message conversion verification method.
Background
With the development and popularization of satellite positioning technology, communication technology and computer network technology, the public demand for location services is becoming more and more important. Differential positioning has been widely accepted by the public as a convenient method for significantly improving positioning accuracy. Manufacturers are also advancing their differential positioning technology and terminal equipment. The differential positioning technology needs to broadcast differential positioning messages to terminal devices, and the differential messages currently have codes that are universal internationally, such as RTCM (RTCM Radio technical commission for Maritime Services), but each vendor also has its own codec format, such as CMR (a differential data format of Trimble corporation) of Trimble corporation, RT17 format, OEM6 (a differential data format of Novtel corporation) message format, different message formats, and different versions, such as RTCM 3.0, RTCM3.2, and different codec formats between different versions. However, in the differential messages broadcast, the data fields of the core are similar, different messages can be mutually converted, but after the messages with different formats are converted, how to verify the correctness of the message conversion does not have a unified standard and flow at present.
Once established, the criteria for message authentication, i.e., the message authenticated by the criteria, is correct, verifiable, and traceable to the processing of the core fields, even if a problem occurs. As to why it is just the processing of the core field, because different messages have different extension fields, these extension fields cannot be unified, and only each message can be processed separately.
At present, the closest scheme is that which message conversion requirement is received, that is, the message conversion is performed, for example, the message of the RTCM is converted into the CMR format, then the CMR data and the RTCM data can be simultaneously broadcast by one receiver, then the procedure of the RTCM to CMR conversion is written, and finally, whether the CMR obtained by conversion, the CMR data and the CMR data broadcast by the receiver are consistent or not is verified.
The problems of the prior art are as follows:
1. the verification modes are not uniform, for example, if a CMR message is to be converted to an RTCM, after conversion, whether the converted data is correct is verified from the data error of an RTCM protocol, if the converted data is to be converted to a Novtel protocol, verification is performed according to the data field standard of the Novtel protocol, and the data field standards of each protocol are inconsistent, so that the verification complexity is improved.
2. The data ranges are not uniform, and in the existing technical scheme, the range and meaning of each field in the data field of each type of message are inconsistent.
3. Post-processing may be required to verify the message after conversion.
4. The processing compatibility for real-time and off-line data is poor. The existing verification method is basically only applicable to off-line data.
Disclosure of Invention
The invention is suitable for verifying the data content after the message conversion is carried out between the GNSS (Global Navigation Satellite System) message formats with different formats, and solves the following technical problems:
1. all data is converted to a uniform format for validation. The unified Format is defined by a RINEX (receiver independent Exchange Format) Format and can be freely expanded. The format is a text format, and each data field also has a uniform standard, so that the data verification of various formats can be performed by using only one verification method.
2. The intermediate data format defined by the invention has definite value and precision range for each data field, and is convenient to verify.
3. The format adopted by the invention refers to the format of RINEX, and is suitable for most current post-processing software.
4. The invention adopts a compatible data input interface, and can conveniently verify real-time data and offline data.
The technical scheme adopted by the invention is as follows:
a method for GNSS message conversion validation, comprising the steps of:
step S1, inputting the message to the unified message verification platform;
step S2, the unified message verification platform detects the source of message output and processes correspondingly;
step S3, the unified message verification platform detects whether the verification of the message is supported;
step S4, if the unified message verification platform supports the verification of the message, it is detected whether the input file conforms to the format of the message, and the integrity of the message content is verified;
step S5, after the integrity of the message content is verified, the message is converted into a uniform message format;
and step S6, verifying the intermediate data format obtained by the message conversion, and outputting the verification result.
Further, the unified message verification platform adopts a plug-in structure.
Further, in step S2, if the source of the message output is an offline file, step S3 is directly performed.
Further, in step S2, if the source of the message output is real-time data, the data conversion module is loaded, the real-time data is written into the file, and step S3 is executed.
Further, the unified message verification platform detects whether the real-time data is supported, if not, a data conversion module supporting the real-time data is developed and then loaded to the unified message verification platform.
Further, in step S3, if the unified message verification platform detects that the unified message verification platform does not support the verification of the message, a data conversion module supporting the message verification is developed, and then the data conversion module is accessed to the unified message verification platform.
Further, the unified message format in step S5 refers to the format standard of RINEX, and can be flexibly extended.
Further, if the current RINEX format of the output message content does not contain the content, the extension field is added.
Further, when the intermediate data format obtained by the message conversion is verified in step S6, verification is performed on the added extension field according to the standard of the extension field.
The invention has the beneficial effects that:
1. the data after various types of conversion are verified by using an intermediate data format, so that the difference of each message can be eliminated, and the verification accuracy and the usability are improved.
2. A unified message verification platform is set up, and both offline file data and real-time streaming data can be verified.
Drawings
FIG. 1 is a flow chart illustrating GNSS message content conversion result verification in accordance with the present invention.
Detailed Description
The invention provides a flexible GNSS message conversion verification method. The invention is further illustrated below with reference to the figures and examples.
FIG. 1 is a flow chart of GNSS message content conversion result verification according to the present invention, and the specific message format detection, content conversion, and data verification can be unified into a unified message verification platform. The method comprises the following steps:
in step S1, to perform the authentication of messages a and B, both messages a and B are input to the unified message authentication platform.
Step S2, the unified message verification platform detects the source of message output, if it is an off-line file, it is directly handed over to the following steps; and if the data stream is the real-time data stream, loading a data conversion module, writing the real-time data stream into a file, and subsequently comparing the real-time data stream with the file.
Step S3, the unified message authentication platform detects whether the authentication of the type of message is currently supported.
Step S4, if the type of message can be supported, it is detected whether the input file conforms to the message format, and the integrity of the message content is checked.
Step S5, after the integrity check of the message content is passed, the message is converted into the unified message format defined by the present invention.
And step S6, verifying the intermediate data format obtained by converting the messages A and B, and outputting the verification result.
Preferably, the unified message verification platform supports the message type in a plug-in manner, in step 2, if the input format is real-time data, the unified message verification platform detects whether the format is supported, and if the format is not supported, only a data conversion module for the real-time data needs to be developed and then loaded to the unified message verification platform.
Preferably, in step 3, the unified message verification platform also detects the input file type, and if the unified message verification platform cannot support the current message type, only a corresponding data conversion module needs to be developed and then the module is accessed to the conversion platform, so that the flexibility of the verification platform is ensured.
Preferably, the unified message format defined by the present invention refers to the format standard of RINEX and can be flexibly extended.
The reason for using the RINEX format is to support most of the post-processing programs on the market conveniently.
If the current RINEX format of the output content does not contain the content, only the extension field needs to be added by the user. During verification, the added extension field can be verified according to the standard of the extension field.
The invention is an off-line processing program, performance is not a main pursuit target, and common computing languages such as Java/C/C + +/C # can be implemented.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (6)
1. A method for GNSS message conversion validation, comprising the steps of:
step S1, inputting the message to the unified message verification platform;
step S2, the unified message verification platform detects the source of message output and processes correspondingly;
step S3, the unified message verification platform detects whether the verification of the message is supported;
step S4, if the unified message verification platform supports the verification of the message, it is detected whether the input file conforms to the format of the message, and the integrity of the message content is verified;
step S5, after the integrity of the message content is verified, the message is converted into a uniform message format;
step S6, the intermediate data format obtained by message conversion is verified, and the verification result is output;
in the step S2, if the source of the message output is real-time data, the data conversion module is loaded, the real-time data is written into a file, and the step S3 is executed;
the unified message verification platform detects whether the real-time data is supported, if not, a data conversion module supporting the real-time data is developed and then loaded to the unified message verification platform;
if the current RINEX format of the output message content does not contain the extension field, the extension field is added.
2. The method of claim 1, wherein the unified message validation platform is configured as a plug-in.
3. The method as claimed in claim 1, wherein in step S2, if the source of the message output is an offline file, the step S3 is directly performed.
4. The method as claimed in claim 1, wherein in step S3, if the unified message verification platform detects that the message verification is not supported, the data conversion module supporting the message verification is developed, and then the data conversion module is connected to the unified message verification platform.
5. The method as claimed in claim 1, wherein the unified message format in step S5 refers to format standard of RINEX and can be flexibly extended.
6. The method as claimed in claim 1, wherein when the intermediate data format obtained by message conversion is verified in step S6, the added extension field is verified according to the standard of the extension field.
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| CN109033137B (en) * | 2018-06-06 | 2021-11-05 | 千寻位置网络有限公司 | Dynamic RINEX data storage method and device |
| WO2020133214A1 (en) * | 2018-12-28 | 2020-07-02 | 深圳市大疆创新科技有限公司 | Observation data conversion method, device, movable platform, and storage medium |
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