CN114360297A - Data transmission method and system for low-altitude airspace general aircraft - Google Patents
Data transmission method and system for low-altitude airspace general aircraft Download PDFInfo
- Publication number
- CN114360297A CN114360297A CN202111568133.5A CN202111568133A CN114360297A CN 114360297 A CN114360297 A CN 114360297A CN 202111568133 A CN202111568133 A CN 202111568133A CN 114360297 A CN114360297 A CN 114360297A
- Authority
- CN
- China
- Prior art keywords
- data
- packet
- sub
- compressed
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The embodiment of the invention provides a data transmission method and a data transmission system of a low-altitude airspace general aircraft, and belongs to the technical field of data transmission of low-altitude airspaces. The method comprises the following steps: at a data sending end, obtaining a compressed data packet and a file length corresponding to the compressed data packet; determining and obtaining a data sub-package containing a packet header identifier controller according to a comparison result of the file length and a preset length threshold; packaging the data sub-package according to a preset Beidou short message format, and sending the packaged data sub-package based on the packet header identifier control symbol; at a data receiving end, receiving the data sub-package from the data sending end, and analyzing the data sub-package according to the format of the Beidou short message; completing the packet packing of the data packets according to the packet header identifier control symbols of the data packets to obtain compressed data packets; the compressed data packets are decompressed to obtain the ADS-B message. The invention can utilize the Beidou short message communication module to realize the transmission of the monitoring data on the short message data link.
Description
Technical Field
The invention relates to the technical field of data transmission of a low-altitude space domain, in particular to a data transmission method and a data transmission system of a low-altitude space domain general aircraft.
Background
In general aviation development, the problem of general aircraft monitoring service capability in low-altitude airspace is particularly prominent. How to solve the problem that the operation monitoring of the general aircraft in the low-altitude airspace is insufficient is an important measure for accelerating the opening of the low-altitude airspace and promoting the faster development of general aviation. In a recent implementation route of an application implementation route map of a Chinese civil aviation Beidou satellite navigation system released by the Minacu office in the end of 2019, positions of general aviation operators are encouraged to realize position reporting by additionally installing Beidou system avionic equipment, and 90% of general aircrafts use Beidou system terminal equipment by the end of 2021.
The general aircraft generally runs in a low-altitude airspace range below 1000m for activities, no matter short-distance aviation travel routes, agriculture and forestry aviation operation requirements, special rescue flight and other activities, the general aviation flight has the characteristics of flexibility and small operation range, so that the traditional radar monitoring means cannot meet the requirements, various monitoring technologies are urgently needed to exert complementary fusion of respective advantages, and the monitoring continuity, the safety level and the operation efficiency are improved. How to ensure the operation efficiency, the flight efficiency and the flight safety becomes an urgent problem which has to be considered by current navigation users.
The existing transmission of monitoring data mainly adopts a Beidou short message communication module to realize transmission, firstly generates messages, then carries out pulse position modulation, and finally carries out power amplification and then broadcasts and sends out. The specific data transmission is limited by the short message, and the data transmission cannot be completed well.
Disclosure of Invention
The embodiment of the invention aims to provide a data transmission method and a data transmission system of a low-altitude airspace general aircraft, which can realize the transmission of monitoring data on a short message data chain by utilizing a Beidou short message communication module.
In order to achieve the above object, an embodiment of the present invention provides a data transmission method for a low-altitude air-space general-purpose aircraft, where the data transmission method for the low-altitude air-space general-purpose aircraft includes:
at the data transmitting end,
compressing the ADS-B message to obtain a compressed data packet and a file length corresponding to the compressed data packet;
determining and executing a compressed packet packaging strategy and a packet header identifier controller adding strategy according to the comparison result of the file length and a preset length threshold value to obtain a data package containing a packet header identifier controller;
packaging the data sub-package according to a preset Beidou short message format, and sending the packaged data sub-package based on the packet header identifier control symbol;
at the data receiving end, the data transmission end,
receiving a data sub-packet from the data sending end, and analyzing the data sub-packet according to the format of the Beidou short message;
completing the packet packing of the data sub-packets according to the packet header identifier control symbols of the data sub-packets to obtain the compressed data packets;
decompressing the compressed data packet to obtain the ADS-B message.
Preferably, the determining and executing a compressed packet packetization policy and a packet header identifier controller adding policy according to a comparison result between the file length and a preset length threshold to obtain a data packetization containing a packet header identifier controller includes:
when the file length is larger than a preset length threshold, calculating the total number of the sub-packets of the compressed data packets and the size of each sub-packet, and determining sub-packet data according to the total number of the sub-packets and the size of each sub-packet; and adding a packet header identifier control symbol to each packet data to obtain a data packet containing the packet header identifier control symbol.
Preferably, the data transmission method of the low-altitude air-space general-purpose aircraft further includes:
when the file length is smaller than or equal to a preset length threshold, directly adding a packet header identifier controller to the packet header of the compressed data packet to obtain a data packet containing the packet header identifier controller;
and encapsulating the data packet according to a preset Beidou short message format, and sending the encapsulated data packet based on the packet header identifier controller.
Preferably, the sending the encapsulated data packets based on the packet header identification controller comprises:
judging whether the packaged data sub-package is lost in the sending process;
and when the loss exists, receiving the sequence number of the lost data sub-packet, and determining and retransmitting the data sub-packet lost in the transmission process based on the sequence number.
Preferably, after the packet packing of the data packets is completed according to the packet header identifier controller of the data packets to obtain the compressed data packets, the data transmission method of the low-altitude air-space domain general purpose aircraft further includes:
when the packaging fails, judging whether the transmission time of the compressed data packet exceeds a preset time threshold value;
when the transmission time of the compressed data packet does not exceed a preset time threshold, judging whether the number of reissue times of the missing compressed sub-packets is greater than a preset reissue time threshold;
and when the number of reissue times of the missing compressed sub-packet is less than or equal to the threshold of the number of reissue times, determining the sequence number of the missing compressed sub-packet, and sending the sequence number to the data sending end.
Preferably, the data transmission method of the low-altitude air-space general-purpose aircraft further includes:
and when the number of times of reissue of the missing compressed sub-packet is larger than the threshold value of the number of times of reissue, abandoning the operation of reissue of the missing compressed sub-packet.
Preferably, the data transmission method of the low-altitude air-space general-purpose aircraft further includes:
and when the transmission time of the compressed data packet exceeds a preset time threshold value, re-receiving the compressed data packet.
In addition, the invention also provides a data transmission system of the low-altitude airspace general aircraft, which comprises:
a data transmitting end, configured to:
compressing the ADS-B message to obtain a compressed data packet and a file length corresponding to the compressed data packet;
determining and executing a compressed packet packaging strategy and a packet header identifier controller adding strategy according to the comparison result of the file length and a preset length threshold value to obtain a data package containing a packet header identifier controller;
packaging the data sub-package according to a preset Beidou short message format, and sending the packaged data sub-package based on the packet header identifier control symbol;
data receiving end of
Receiving a data sub-packet from the data sending end, and analyzing the data sub-packet according to the format of the Beidou short message;
completing the packet packing of the data sub-packets according to the packet header identifier control symbols of the data sub-packets to obtain the compressed data packets;
decompressing the compressed data packet to obtain the ADS-B message.
In addition, the invention also provides a machine-readable storage medium, wherein the machine-readable storage medium is stored with instructions, and the instructions are used for enabling a machine to execute the data transmission method of the low-altitude airspace general-purpose aircraft.
In addition, the present invention also provides a processor for executing a program, wherein the program is executed to perform: the data transmission method of the low-altitude airspace general aircraft is described above.
By the technical scheme, the ADS-B message data is transmitted on the short message data chain, and the ADS-B message data is compressed to the length of the short message to complete normal data transmission. Then the receiving end can package the ADS-B message, and finally the data receiving end can receive the ADS-B message to ensure the safe, effective and successful transmission of the data.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
fig. 1 is a flow chart illustrating a data transmission method of a low-altitude airspace general-purpose aircraft according to the present invention;
FIG. 2 is a flow chart illustrating a method for transmitting data of a low-altitude airspace general-purpose aircraft according to the present invention; and
fig. 3 is a flow chart illustrating a data receiving method of a low-altitude airspace general-purpose aircraft according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a flowchart of a data transmission method of a low-altitude airspace general-purpose aircraft according to the present invention, and as shown in fig. 1, the data transmission method of the low-altitude airspace general-purpose aircraft includes:
s101, compressing ADS-B information at a data sending end to obtain a compressed data packet and a file length corresponding to the compressed data packet; determining and executing a compressed packet packaging strategy and a packet header identifier controller adding strategy according to the comparison result of the file length and a preset length threshold value to obtain a data package containing a packet header identifier controller; and encapsulating the data sub-package according to a preset Beidou short message format, and sending the encapsulated data sub-package based on the packet header identifier control symbol. The file length threshold of the data packet is set to 65 bytes. The invention reads ADS-B information from the sending buffer area, and the LZW compression algorithm is carried out on the information data for compression and storage, and the length of the compressed data packet is calculated. For example, when the file length is 128 bytes long, the file may be divided into two sub-packets, each sub-packet is 64 bytes, and each sub-packet is smaller than the file length threshold. The transmission steps of a specific transmitting end are shown in fig. 2.
The data sending end comprises message generation (data receiving, protocol conversion, message coding and packaging) and message exchange transmission (extended discontinuous oscillation starting, radio frequency antenna broadcast transmission). Firstly, a data sending end receives related information source data through an input interface module, the information sources come from other airborne systems (such as GNSS, a barometer and other sensors), and the obtained information sources are subjected to data caching. Then, a format conversion submodule in the message control coding module converts GNSS data in a NEMA0183 format in the cache region into a small specified message format suitable for ADS-B, encapsulates PVT messages into 56bit 'ME fields' specified by different DF17 formats respectively, and stores the fields into a specific register inside the S-mode responder according to a specific time sequence; finally, the message control coding module embeds the 56bit 'ME' field of the encapsulated number, which is stored in an internal register of the responder, into the 112bit ADS-B message in the DF17 format to complete message assembly coding; thus, the ADS-B message generation function is completed.
Then, the base band modulation module carries out pulse position modulation processing on the ADS-B signal assembled into a frame to generate a random expansion oscillation trigger signal, the ADS-B signal after modulation is applied to a carrier frequency, and finally the ADS-B signal after power amplification is sent out through random broadcasting of a transmitting antenna sub-module; thus, the ADS-B message conversion function is completed.
S102, receiving a data sub-package from the data sending end at a data receiving end, and analyzing the data sub-package according to the format of the Beidou short message; completing the packet packing of the data sub-packets according to the packet header identifier control symbols of the data sub-packets to obtain the compressed data packets; decompressing the compressed data packet to obtain the ADS-B message. The specific steps at the receiving end are shown in fig. 3.
The invention decompresses the grouped data according to LZM compression algorithm to obtain ADS-B message, and stores the processed data for subsequent processing.
Preferably, the determining and executing a compressed packet packetization policy and a packet header identifier controller adding policy according to a comparison result between the file length and a preset length threshold to obtain a data packetization containing a packet header identifier controller includes:
when the file length is larger than a preset length threshold value of 65Byte, calculating the total number of sub-packets of the compressed data packets and the size of each sub-packet, determining sub-packet data according to the total number of sub-packets and the size of each sub-packet, wherein the number of each sub-packet cannot exceed 65Byte, determining the total number of sub-packets according to the total data amount, determining the number of sub-packets which can be divided based on the maximum sub-packet length, then dividing the length of each sub-packet according to the determined number, for example, the length of the compressed data is 200, then dividing the length of the compressed data into 4 according to 64 sub-packets, and then dividing the length of the compressed data into 200 according to 4 numbers, thus obtaining the length of each data packet as 50. And adding a packet header identifier control symbol to each packet data to obtain a data packet containing the packet header identifier control symbol.
Preferably, the data transmission method of the low-altitude air-space general-purpose aircraft may further include:
when the file length is less than or equal to a preset length threshold 65Byte, directly adding a packet header identifier controller to the packet header of the compressed data packet to obtain a data packet containing the packet header identifier controller;
and encapsulating the data packet according to a preset Beidou short message format, and sending the encapsulated data packet based on the packet header identifier controller.
Preferably, the sending of the encapsulated data packets based on the packet header identification controller may include:
judging whether the packaged data sub-package is lost in the sending process; the data loss may be determined according to the header identifier control, for example, the tag is 0001, 0010, 0011, etc., in sequence, and when there is one less in sequence, it is determined that there is a possible data loss.
And when the loss exists, receiving the sequence number of the lost data sub-packet, and determining and retransmitting the data sub-packet lost in the transmission process based on the sequence number.
Preferably, after the packet packing of the data packets is completed according to the packet header identifier controller of the data packets to obtain the compressed data packets, the data transmission method of the low-altitude air-space domain general purpose aircraft may further include:
when the packaging fails, judging whether the transmission time of the compressed data packet exceeds a preset time threshold value; the packet failure refers to the lack of partial data packetization, which is the same concept as the data loss, but the packet failure of the present invention is the work of the receiving end, and the loss is the detection of the transmitting end.
When the transmission time of the compressed data packet does not exceed a preset time threshold for 10min, judging whether the number of reissue times of the missing compressed sub-packet is greater than a preset reissue time threshold for 10 times;
and when the number of reissue times of the missing compressed sub-packet is less than or equal to the threshold value of the number of reissue times for 10 times, determining the sequence number of the missing compressed sub-packet, and sending the sequence number to the data sending end.
Preferably, the data transmission method of the low-altitude air-space general-purpose aircraft may further include:
and when the number of times of the complement of the missing compressed sub-packet is greater than the threshold value of the number of times of the complement by 10 times, abandoning the complement operation of the missing compressed sub-packet.
Preferably, the data transmission method of the low-altitude air-space general-purpose aircraft may further include:
and when the transmission time of the compressed data packet exceeds a preset time threshold value for 10 times, re-receiving the compressed data packet.
In addition, the invention also provides a data transmission system of the low-altitude airspace general aircraft, which comprises:
a data transmitting end, configured to:
compressing the ADS-B message to obtain a compressed data packet and a file length corresponding to the compressed data packet;
determining and executing a compressed packet packaging strategy and a packet header identifier controller adding strategy according to the comparison result of the file length and a preset length threshold value to obtain a data package containing a packet header identifier controller;
packaging the data sub-package according to a preset Beidou short message format, and sending the packaged data sub-package based on the packet header identifier control symbol;
data receiving end of
Receiving a data sub-packet from the data sending end, and analyzing the data sub-packet according to the format of the Beidou short message;
completing the packet packing of the data sub-packets according to the packet header identifier control symbols of the data sub-packets to obtain the compressed data packets;
decompressing the compressed data packet to obtain the ADS-B message.
Preferably, the determining and executing, by the data sending end, the compressed packet packetization policy and the packet header identifier controller adding policy according to the comparison result between the file length and the preset length threshold to obtain the data packetization including the packet header identifier controller includes:
when the file length is larger than a preset length threshold value, the data transmitting end calculates the total number of sub-packets of the compressed data packets and the size of each sub-packet, and determines sub-packet data according to the total number of sub-packets and the size of each sub-packet; and adding a packet header identifier control symbol to each packet data to obtain a data packet containing the packet header identifier control symbol.
Preferably, the data transmission system of the low-altitude air-space general-purpose aircraft further includes:
a data packet obtaining module, configured to, when the file length is smaller than or equal to a preset length threshold, directly add a packet header identifier controller to a packet header of the compressed data packet to obtain a data packet including the packet header identifier controller;
and the data packet packaging module is used for packaging the data packet according to a preset Beidou short message format and sending the packaged data packet based on the packet header identifier control symbol.
Preferably, the encapsulation packet module includes:
the loss judgment submodule is used for judging whether the data sub-packet which is packaged is lost in the sending process;
and the retransmission submodule is used for receiving the sequence number of the lost data sub-packet when the loss exists, and determining and retransmitting the lost data sub-packet in the transmission process based on the sequence number.
Preferably, after the data receiving end completes the packet packing of the data packets according to the packet header identifier controller of the data packets to obtain the compressed data packets, the data transmission system of the low-altitude airspace universal aircraft further includes:
a time threshold judging module, configured to judge whether transmission time of the compressed data packet exceeds a preset time threshold when the packet packaging fails;
a reissue threshold judgment module, configured to judge whether the number of reissue times of the missing compressed sub-packet is greater than a preset reissue time threshold when the transmission time of the compressed data packet does not exceed the preset time threshold;
and the sequence number sending module is used for determining the missing sequence number of the compressed sub-packet when the missing reissue times of the compressed sub-packet is less than or equal to the reissue time threshold value, and sending the sequence number to the data sending end.
Preferably, the sequence number sending module is further configured to discard the reissue operation of the missing compressed sub-packet when the number of reissues of the missing compressed sub-packet is greater than the threshold value of the number of reissues.
Preferably, the data transmission system of the low-altitude air-space general-purpose aircraft further includes: and the re-receiving module is used for re-receiving the compressed data packet when the transmission time of the compressed data packet exceeds a preset time threshold.
Compared with the prior art, the data transmission system of the low-altitude air-space general aircraft has the same distinguishing technical features and technical effects as the data transmission method of the low-altitude air-space general aircraft, and is not repeated herein.
In addition, the invention also provides a machine-readable storage medium, wherein the machine-readable storage medium is stored with instructions, and the instructions are used for enabling a machine to execute the data transmission method of the low-altitude airspace general-purpose aircraft.
In addition, the present invention also provides a processor for executing a program, wherein the program is executed to perform: the data transmission method of the low-altitude airspace general aircraft is described above.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A data transmission method of a low-altitude air-space general aircraft is characterized by comprising the following steps:
at the data transmitting end,
compressing the ADS-B message to obtain a compressed data packet and a file length corresponding to the compressed data packet;
determining and executing a compressed packet packaging strategy and a packet header identifier controller adding strategy according to the comparison result of the file length and a preset length threshold value to obtain a data package containing a packet header identifier controller;
packaging the data sub-package according to a preset Beidou short message format, and sending the packaged data sub-package based on the packet header identifier control symbol;
at the data receiving end, the data transmission end,
receiving a data sub-packet from the data sending end, and analyzing the data sub-packet according to the format of the Beidou short message;
completing the packet packing of the data sub-packets according to the packet header identifier control symbols of the data sub-packets to obtain the compressed data packets;
decompressing the compressed data packet to obtain the ADS-B message.
2. The method for transmitting data of a low-altitude airspace general-purpose aircraft according to claim 1, wherein the determining and executing a compressed packet packetization strategy and a packet header identifier controller adding strategy according to the comparison result between the file length and a preset length threshold value to obtain the data packetization containing the packet header identifier controller comprises:
when the file length is larger than a preset length threshold, calculating the total number of the sub-packets of the compressed data packets and the size of each sub-packet, and determining sub-packet data according to the total number of the sub-packets and the size of each sub-packet; and adding a packet header identifier control symbol to each packet data to obtain a data packet containing the packet header identifier control symbol.
3. The data transmission method of the low-altitude air-space general-purpose aircraft according to claim 2, wherein the data transmission method of the low-altitude air-space general-purpose aircraft further comprises:
when the file length is smaller than or equal to a preset length threshold, directly adding a packet header identifier controller to the packet header of the compressed data packet to obtain a data packet containing the packet header identifier controller;
and encapsulating the data packet according to a preset Beidou short message format, and sending the encapsulated data packet based on the packet header identifier controller.
4. The method for transmitting data of a low-altitude airspace general-purpose aircraft according to claim 1, wherein the sending the encapsulated data sub-packets based on the header identification controller includes:
judging whether the packaged data sub-package is lost in the sending process;
and when the loss exists, receiving the sequence number of the lost data sub-packet, and determining and retransmitting the data sub-packet lost in the transmission process based on the sequence number.
5. The data transmission method of the low-altitude air-space general-purpose aircraft according to claim 1, wherein after the completing the packet packing of the data packetization according to the packet header identifier control symbol of the data packetization to obtain the compressed data packet, the data transmission method of the low-altitude air-space general-purpose aircraft further comprises:
when the packaging fails, judging whether the transmission time of the compressed data packet exceeds a preset time threshold value;
when the transmission time of the compressed data packet does not exceed a preset time threshold, judging whether the number of reissue times of the missing compressed sub-packets is greater than a preset reissue time threshold;
and when the number of reissue times of the missing compressed sub-packet is less than or equal to the threshold of the number of reissue times, determining the sequence number of the missing compressed sub-packet, and sending the sequence number to the data sending end.
6. The data transmission method of the low-altitude air-space general-purpose aircraft according to claim 5, wherein the data transmission method of the low-altitude air-space general-purpose aircraft further comprises:
and when the number of times of reissue of the missing compressed sub-packet is larger than the threshold value of the number of times of reissue, abandoning the operation of reissue of the missing compressed sub-packet.
7. The data transmission method of the low-altitude air-space general-purpose aircraft according to claim 5, wherein the data transmission method of the low-altitude air-space general-purpose aircraft further comprises:
and when the transmission time of the compressed data packet exceeds a preset time threshold value, re-receiving the compressed data packet.
8. A data transmission system of a low-altitude airspace general-purpose aircraft, the data transmission system comprising:
a data transmitting end, configured to:
compressing the ADS-B message to obtain a compressed data packet and a file length corresponding to the compressed data packet;
determining and executing a compressed packet packaging strategy and a packet header identifier controller adding strategy according to the comparison result of the file length and a preset length threshold value to obtain a data package containing a packet header identifier controller;
packaging the data sub-package according to a preset Beidou short message format, and sending the packaged data sub-package based on the packet header identifier control symbol;
data receiving end of
Receiving a data sub-packet from the data sending end, and analyzing the data sub-packet according to the format of the Beidou short message;
completing the packet packing of the data sub-packets according to the packet header identifier control symbols of the data sub-packets to obtain the compressed data packets;
decompressing the compressed data packet to obtain the ADS-B message.
9. A machine-readable storage medium having stored thereon instructions for causing a machine to execute the method for data transmission of a low-altitude air-space general-purpose aircraft according to any one of claims 1 to 7.
10. A processor configured to execute a program, wherein the program is configured to perform: the data transmission method of the low-altitude air-space general aircraft according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111568133.5A CN114360297A (en) | 2021-12-21 | 2021-12-21 | Data transmission method and system for low-altitude airspace general aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111568133.5A CN114360297A (en) | 2021-12-21 | 2021-12-21 | Data transmission method and system for low-altitude airspace general aircraft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114360297A true CN114360297A (en) | 2022-04-15 |
Family
ID=81101016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111568133.5A Pending CN114360297A (en) | 2021-12-21 | 2021-12-21 | Data transmission method and system for low-altitude airspace general aircraft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114360297A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115150387A (en) * | 2022-06-14 | 2022-10-04 | 炫彩互动网络科技有限公司 | Data transmission method in cloud games |
| CN115767450A (en) * | 2022-11-22 | 2023-03-07 | 亿航智能设备（广州）有限公司 | Beidou short message communication method and equipment and computer readable storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106033646A (en) * | 2015-03-11 | 2016-10-19 | 沈阳空管技术开发有限公司 | Air traffic control system based on Beidou short message function |
| CN107818696A (en) * | 2017-10-20 | 2018-03-20 | 西安戴森电子技术有限公司 | The all purpose aircraft monitoring platform of the Big Dipper, ADS B dual links navigation equipment structure |
| CN111931007A (en) * | 2020-08-10 | 2020-11-13 | 四川九洲空管科技有限责任公司 | High-compatibility comprehensive display control method for prevention, control and monitoring information of unmanned aerial vehicle |
-
2021
- 2021-12-21 CN CN202111568133.5A patent/CN114360297A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106033646A (en) * | 2015-03-11 | 2016-10-19 | 沈阳空管技术开发有限公司 | Air traffic control system based on Beidou short message function |
| CN107818696A (en) * | 2017-10-20 | 2018-03-20 | 西安戴森电子技术有限公司 | The all purpose aircraft monitoring platform of the Big Dipper, ADS B dual links navigation equipment structure |
| CN111931007A (en) * | 2020-08-10 | 2020-11-13 | 四川九洲空管科技有限责任公司 | High-compatibility comprehensive display control method for prevention, control and monitoring information of unmanned aerial vehicle |
Non-Patent Citations (1)
| Title |
|---|
| 刘飞 等: "基于北斗RDSS的监视数据传输技术研究", 《信息技术》, vol. 44, no. 1, pages 15 - 19 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115150387A (en) * | 2022-06-14 | 2022-10-04 | 炫彩互动网络科技有限公司 | Data transmission method in cloud games |
| CN115767450A (en) * | 2022-11-22 | 2023-03-07 | 亿航智能设备（广州）有限公司 | Beidou short message communication method and equipment and computer readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114360297A (en) | Data transmission method and system for low-altitude airspace general aircraft | |
| CN107819675B (en) | Internet of things gateway and Internet of things communication method | |
| CN108965484B (en) | Internet of things data transmission method, system and terminal | |
| CN110249641B (en) | Apparatus and method for V2X communication | |
| CN111050361B (en) | Message transmission method, device and system | |
| CN103595504A (en) | Encapsulation method and calibration method for data package | |
| US11696246B2 (en) | Aggregating messages into a single transmission | |
| CN111601285B (en) | Communication method, apparatus, system, and computer-readable storage medium | |
| CN107294913B (en) | Secure communication method based on HTTP, server and client | |
| CN103873177A (en) | Vehicular-network-based safety information transmission method | |
| CN110677354A (en) | Message transmission method, terminal and server | |
| WO2022012210A1 (en) | Data packaging method, device, and system, and computer-readable storage medium | |
| CN111917770B (en) | Device communication method, device and storage medium | |
| CN114302442A (en) | Low-cost V2X fuzzy test method based on SDR | |
| CN110139360B (en) | Paging strategy determination method and device, RAN network element and core network element | |
| US11943654B2 (en) | Method and apparatus for transmitting buffer size report including dual bitmap information by wireless node in wireless communication system | |
| CN110139317B (en) | Data compression method, decompression method, sending end and receiving end | |
| JP2016515773A (en) | Frequency diversity transmission method for machine type communication | |
| US11196792B2 (en) | Method, device and system for transmitting data | |
| CN113595694B (en) | Data transmission method, computing device and storage medium | |
| CN109150406B (en) | Data packet subpackaging method for byte stream communication | |
| US20190124686A1 (en) | Low-power wide-area network server and terminal, and a method of avoiding uplink transmission collision | |
| CN111224740A (en) | Control information sending and receiving method and terminal equipment | |
| CN110972089A (en) | Method, equipment and computer storage medium for signaling transmission | |
| CN107113908B (en) | Data sending method, data processing method and equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |