CN112003937A - Satellite data transmission method, satellite data transmission device, computer equipment and storage medium - Google Patents
Satellite data transmission method, satellite data transmission device, computer equipment and storage medium Download PDFInfo
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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
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18532—Arrangements for managing transmission, i.e. for transporting data or a signalling message
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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
- H04L67/55—Push-based network services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
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Abstract
The invention discloses a satellite data transmission method, a device, computer equipment and a storage medium, wherein the method comprises the steps of setting a data transmission format, and enabling the data transmission format to comprise a protocol identification code, a protocol header length identification code and protocol data content which are generated according to the type of a transmission protocol; carrying out format specification on data to be processed according to the protocol identification code, filling the data with the specified format into a protocol data content item in the data transmission format, and obtaining the data to be pushed; sending a data transmission request to a receiving end, and sending the data to be pushed to a measurement and control center end or a measurement and control equipment end; and receiving a data transmission request, and processing and analyzing the data format according to the protocol identification code. The satellite data transmission system is compatible with the existing satellite data transmission protocol, has good expansion capability, can realize data transmission among the existing measurement and control equipment, newly-built measurement and control equipment and a measurement and control center, realizes sharing of the measurement and control equipment, and can maximize the utilization rate of the measurement and control equipment.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a satellite data transmission method and apparatus, a computer device, and a storage medium.
Background
In the prior art, downlink measurement and control data of a satellite are received through measurement and control equipment and transmitted to a measurement and control center for processing, uplink remote control data are processed and generated by the measurement and control center and are transmitted to the satellite through the measurement and control equipment, the measurement and control equipment is a data transmission channel between the satellite and the measurement and control center, however, the measurement and control equipment is developed in different generations and different manufacturers and simultaneously belongs to different measurement and control centers, data transmission between the measurement and control equipment and the measurement and control center adopts an internal protocol defined by each unit, the currently adopted main protocols have formats such as HDLC, UDF and the like, data formats corresponding to different data transmission protocols are different, and due to the fact that no unified standard exists, satellite data received by different measurement and control equipment cannot be shared among centers.
In the past aerospace measurement and control, because the manufacture, the emission and the operation of satellites are all carried out by national plans, the satellite measurement and control and the on-orbit management are also born by national satellite measurement and control centers, the number of the satellites for on-orbit management is small, and measurement and control equipment belongs to one measurement and control center, so that the satellite data transmission requirements can be met by adopting a self-defined data transmission protocol.
With the coming of the commercial aerospace era, a large number of civil and commercial satellites and constellations enter a launching and running state, a large number of measurement and control devices are correspondingly needed to track and control the satellites, the existing measurement and control device resources cannot meet the requirements of commercial aerospace development, part of enterprises specialized in commercial measurement and control and third-party enterprises specialized in providing shared measurement and control devices are emerged under the situation, the number of the measurement and control devices is rapidly increased, and if a satellite data transmission protocol defined by standards is not available, data transmission among a measurement and control center, the own measurement and control devices and the third-party shared measurement and control devices cannot be realized, so that the measurement and control requirements of a large number of satellites and constellations cannot be met.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
For the above reasons, the present applicant proposes a satellite data transmission method, apparatus, computer device, and storage medium.
Disclosure of Invention
In order to meet the above-mentioned requirements, a first object of the present invention is to provide a satellite data transmission method.
A second object of the present invention is to provide a satellite data transmission apparatus.
It is a third object of the invention to provide a computer apparatus.
It is a fourth object of the invention to provide a non-transitory computer-readable storage medium.
In order to achieve the purpose, the invention adopts the following technical scheme:
on one hand, the embodiment of the application provides a satellite data transmission method, which is applied to a measurement and control center end or a measurement and control equipment end and comprises the following steps:
setting a data transmission format, wherein the data transmission format comprises a protocol identification code, a protocol header length identification code and protocol data content which are generated according to the type of a transmission protocol;
carrying out format specification on data to be processed according to the protocol identification code, filling the data with the specified format into a protocol data content item in the data transmission format, and obtaining the data to be pushed;
sending a data transmission request to a receiving end, and sending the data to be pushed to a measurement and control center end or a measurement and control equipment end;
and receiving a data transmission request, and processing and analyzing the data format according to the protocol identification code.
In a possible embodiment, the step of performing format specification on the data to be processed according to the protocol identifier includes:
making the protocol data content sequentially comprise: satellite task code number, source address for generating and sending data station address of the frame information, destination address for receiving data station address of the frame information, information mark for indicating the type of the frame information, packet number for indicating the data packet accumulation count of the same data mark sent by both data transmission parties, control field for identifying basic control information of application data packet, date field for indicating the accumulated date of the source sending the data packet relative to the preset time point, time field for indicating the accumulated second of the source sending the data packet relative to the preset time point, data and length mark and data field.
On the other hand, the embodiment of the present application further provides a satellite data transmission apparatus, including the following units:
the format definition unit is used for setting a data transmission format, so that the data transmission format comprises a protocol identification code, a protocol header length identification code and protocol data content which are generated according to the type of a transmission protocol;
the protocol data filling unit is used for carrying out format specification on data to be processed according to the protocol identification code, filling the data with the specified format to a protocol data content item in the data transmission format, and obtaining the data to be pushed;
the data pushing unit is used for sending a data transmission request to a receiving end and sending the data to be pushed to a measurement and control center end or a measurement and control equipment end;
and the data receiving unit is used for receiving the data transmission request and processing and analyzing the data format according to the protocol identification code.
In one possible implementation, the protocol data padding unit includes a format specification subunit, configured to enable the protocol data content to sequentially include: satellite task code number, source address for generating and sending data station address of the frame information, destination address for receiving data station address of the frame information, information mark for indicating the type of the frame information, packet number for indicating the data packet accumulation count of the same data mark sent by both data transmission parties, control field for identifying basic control information of application data packet, date field for indicating the accumulated date of the source sending the data packet relative to the preset time point, time field for indicating the accumulated second of the source sending the data packet relative to the preset time point, data and length mark and data field.
In a third aspect, an embodiment of the present application further provides a computer device, including a memory, a processor, and a satellite data transmission program stored on the memory and executable on the processor, wherein the satellite data transmission program, when executed by the processor, implements the satellite data transmission method as described above.
In a fourth aspect, embodiments of the present application propose a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the satellite data transmission method as described above.
Compared with the prior art, the invention has the beneficial effects that: the satellite data transmission method provided by the embodiment of the application defines a new satellite data transmission protocol, can be formulated according to the characteristics of satellite data transmission, has self-adaptive characteristics, can be compatible with several existing satellite data transmission protocols and has good expansion functions, can realize satellite data transmission among different measurement and control centers, measurement and control equipment and third-party shared measurement and control equipment by using the protocol, realizes the maximization of the resource utilization rate of the measurement and control equipment, and further meets the measurement and control requirements of commercial satellites and constellations. The satellite data transmission method can realize data transmission among the existing measurement and control equipment, newly-built measurement and control equipment and a measurement and control center, thereby realizing sharing of the measurement and control equipment, maximizing the utilization rate of the measurement and control equipment, reducing the construction and operation cost of measurement and control enterprises, and further meeting the measurement and control development requirements of commercial satellites and constellations.
The invention is further described below with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic view of a specific application scenario of a satellite data transmission method according to an embodiment of the present application;
fig. 2 is a schematic flowchart of an embodiment of a satellite data transmission method according to the present disclosure;
fig. 3 is a schematic view of another specific application scenario of a satellite data transmission method according to an embodiment of the present application;
fig. 4 is a schematic block diagram of a satellite data transmission device provided in an embodiment of the present application;
fig. 5 is a schematic block diagram of a computer device provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a specific application scenario of a satellite data transmission method according to an embodiment of the present application; fig. 2 is a schematic flowchart of an embodiment of a satellite data transmission method according to the present disclosure; the satellite data transmission method includes a measurement and control center terminal 20 or a measurement and control equipment terminal 10, where the measurement and control equipment terminal 10 shown in fig. 1 only lists one place as an example, and a person skilled in the art may set or newly build a plurality of corresponding measurement and control equipment terminals 10 according to actual needs, where the satellite data transmission method provided in the embodiment of the present application includes the following steps:
step S101, setting a data transmission format to enable the data transmission format to comprise a protocol identification code, a protocol header length identification code and protocol data content, wherein the protocol identification code is generated according to the type of a transmission protocol.
Specifically, the present step is intended to utilize the wrapping of data, and the wrapped data format includes three parts, protocol identification code (PID), protocol Header Length (HLEN), and protocol data content (PDATA). Wherein, PID is protocol version, represents protocol identification code, occupies 1 byte, and the corresponding content is shown in table one:
watch 1
In one embodiment, the protocol Header Length (HLEN) is a protocol header length, which takes 1 byte and is unsigned, and represents the length of the inner protocol header after the position of the protocol header and before the actual transmission data field. The protocol data content (PDATA) is the protocol data content, and the length is the sum of the length of the protocol header and the length of the actual data.
And S102, carrying out format specification on data to be processed according to the protocol identification code, filling the data with the specified format into a protocol data content item in the data transmission format, and obtaining the data to be pushed.
Specifically, this step is intended to fill in the entire field in the protocol data content (PDATA) of step S101, the protocol identification code according to step S101 representing a specific data transfer protocol;
in an embodiment, referring to the data format schematic diagram set in step S101 shown in fig. 3, the F0 format is adopted by default:
f0 format protocol unit format:
the MID is a satellite task code number and occupies 2 bytes;
SID is source address, accounting for 4 bytes, the source address represents the data station address generating and sending the frame information, when the measurement and control center forwards the frame information, the source address is still the data station address generating the frame information;
DID is an information sink address, and occupies 4 bytes, the information sink address represents the address of a data station for receiving the frame information, and when the frame information is forwarded by the measurement and control center, the information sink address needs to be changed into a new receiving station address;
BID is an information mark, and occupies 4 bytes, and the information mark represents the type of the frame information;
and NO. is a packet sequence number, which occupies 4 bytes, wherein the packet sequence number is the accumulated count of data packets which send the same data mark (BID) by a certain end-to-end data transmission party and is repeatedly counted by 0-232-1. For the data which is forwarded but not processed, the packet sequence number of the data packet is not changed;
the CTL is a control field, and occupies 4 bytes, and the CTL is basic control information for identifying the application data packet, and the following table two of the encoding rules:
watch two
The DATE is an information source for sending the data packet, and occupies 2 bytes relative to the product day of 1 month and 1 day in 2000 in Beijing, and 1 month and 1 day in 2000 is counted as the first day;
TIME is the product second of the data packet sent by the information source relative to the TIME of day, and occupies 4 bytes, and the quantization unit of the product second is 0.1 ms;
LEN is the length (number of bytes) of a data field, and accounts for 4 bytes, and the length of the data field is an unsigned integer;
DATA is a DATA field, occupying LEN bytes, which is the actual meaningful DATA to be transferred.
Step S103, sending a data transmission request to a receiving end, and sending the data to be pushed to a measurement and control center end or a measurement and control equipment end;
the step can be initiated by a measurement and control center end or a measurement and control equipment end, and data is sent to a corresponding end.
And step S104, receiving the data transmission request, and processing and analyzing the data format according to the protocol identification code.
The step can be received by a measurement and control center end or a measurement and control equipment end, and data is processed according to the processing process of the step. The method can realize automatic identification of the current data transmission format according to a protocol identification code (PID), and the sender and the receiver perform processing and analysis processing on the data format according to the PID, so the method is completely compatible with the existing data transmission formats such as UDF and the like of the current aerospace measurement and control system. The data transmission among the existing measurement and control equipment, newly-built measurement and control equipment and a measurement and control center can be realized, so that the measurement and control equipment is shared, the utilization rate of the measurement and control equipment is maximized, the construction and operation cost of measurement and control enterprises is reduced, and the measurement and control development requirements of commercial satellites and constellations are further met.
On the other hand, as shown in fig. 4, the embodiment of the present invention further provides a satellite data transmission apparatus 200, and fig. 4 is a schematic block diagram of the satellite data transmission apparatus provided in the embodiment of the present invention. As shown in fig. 4, the present invention also provides a satellite data transmission device corresponding to the above satellite data transmission method, and the device can be configured in a terminal such as a measurement and control center terminal, a measurement and control equipment terminal, a desktop computer, a tablet computer, and a laptop computer. The device comprises a unit for executing the satellite data transmission method, and comprises the following units:
a format defining unit 201, configured to set a data transmission format, so that the data transmission format includes a protocol identification code generated according to a type of a transmission protocol, a protocol header length identification code, and a protocol data content;
the protocol data filling unit 202 is configured to perform format specification on data to be processed according to the protocol identification code, fill the data with the format specification to a protocol data content item in the data transmission format, and obtain the data to be pushed;
the data pushing unit 203 is configured to send a data transmission request to a receiving end, and send the data to be pushed to a measurement and control center end or a measurement and control equipment end;
and a data receiving unit 204, configured to receive the data transmission request, and perform processing and analysis processing on the data format according to the protocol identifier.
In an embodiment, the protocol data padding unit 202 includes a first format specification subunit 2021, configured to enable the protocol data content to sequentially include: satellite task code number, source address for generating and sending data station address of the frame information, destination address for receiving data station address of the frame information, information mark for indicating the type of the frame information, packet number for indicating the data packet accumulation count of the same data mark sent by both data transmission parties, control field for identifying basic control information of application data packet, date field for indicating the accumulated date of the source sending the data packet relative to the preset time point, time field for indicating the accumulated second of the source sending the data packet relative to the preset time point, data and length mark and data field.
It should be noted that, as can be clearly understood by those skilled in the art, the specific implementation process of the electronic module may refer to the corresponding description in the foregoing method embodiment, and for convenience and brevity of description, no further description is provided herein.
Referring to fig. 5, the computer device 300 includes a processor 302, memory, and a network interface 305 connected by a system bus 301, where the memory may include a non-volatile storage medium 303 and an internal memory 304.
The nonvolatile storage medium 303 may store an operating system 3031 and a computer program 3032. The computer program 3032 includes program instructions that, when executed, cause the processor 302 to perform a satellite data transmission method.
The processor 302 is used to provide computing and control capabilities to support the operation of the overall computer device 300.
The internal memory 304 provides an environment for the operation of the computer program 3032 in the non-volatile storage medium 303, and the computer program 3032, when executed by the processor 302, causes the processor 302 to perform a satellite data transmission method.
The network interface 305 is used for network communication with other devices. Those skilled in the art will appreciate that the configuration shown in fig. 5 is a block diagram of only a portion of the configuration associated with the present application and does not constitute a limitation of the computer apparatus 300 to which the present application is applied, and that a particular computer apparatus 300 may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
The storage medium may be a usb disk, a removable hard disk, a Read-Only Memory (ROM), a magnetic disk, or an optical disk, which can store various computer readable storage media.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative. For example, the division of each unit is only one logic function division, and there may be another division manner in actual implementation. For example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs. The units in the device of the embodiment of the invention can be merged, divided and deleted according to actual needs. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a storage medium. Based on such understanding, the technical solution of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a terminal, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A satellite data transmission method is characterized in that the method is applied to a measurement and control center end or a measurement and control equipment end and comprises the following steps:
setting a data transmission format, wherein the data transmission format comprises a protocol identification code, a protocol header length identification code and protocol data content which are generated according to the type of a transmission protocol;
carrying out format specification on data to be processed according to the protocol identification code, filling the data with the specified format into a protocol data content item in the data transmission format, and obtaining the data to be pushed;
sending a data transmission request to a receiving end, and sending the data to be pushed to a measurement and control center end or a measurement and control equipment end;
and receiving a data transmission request, and processing and analyzing the data format according to the protocol identification code.
2. The satellite data transmission method as claimed in claim 1, wherein the step of performing format specification on the data to be processed according to the protocol identification code comprises:
making the protocol data content sequentially comprise: the system comprises a satellite task code, a source address for indicating a data station address for generating and sending the frame information, a sink address for indicating the data station address for receiving the frame information, an information mark for indicating the type of the frame information, a packet number for indicating the accumulated count of data packets of which both data transmission sides send the same data mark, a control field for identifying basic control information of an application data packet, a date field for indicating the accumulated date of the source sending the data packet relative to a preset time point, a time field for indicating the accumulated second of the source sending the data packet relative to the preset time point, a data field length identifier and a data field.
3. A satellite data transmission apparatus, comprising:
the format definition unit is used for setting a data transmission format, so that the data transmission format comprises a protocol identification code, a protocol header length identification code and protocol data content which are generated according to the type of a transmission protocol;
the protocol data filling unit is used for carrying out format specification on data to be processed according to the protocol identification code, filling the data with the specified format to a protocol data content item in the data transmission format, and obtaining the data to be pushed;
the data pushing unit is used for sending a data transmission request to a receiving end and sending the data to be pushed to a measurement and control center end or a measurement and control equipment end;
and the data receiving unit is used for receiving the data transmission request and processing and analyzing the data format according to the protocol identification code.
4. The satellite data transmission device as claimed in claim 3, wherein the protocol data stuffing unit comprises a format specification subunit for making the protocol data contents sequentially include: the system comprises a satellite task code, a source address for indicating a data station address for generating and sending the frame information, a sink address for indicating the data station address for receiving the frame information, an information mark for indicating the type of the frame information, a packet number for indicating the accumulated count of data packets of which both data transmission sides send the same data mark, a control field for identifying basic control information of an application data packet, a date field for indicating the accumulated date of the source sending the data packet relative to a preset time point, a time field for indicating the accumulated second of the source sending the data packet relative to the preset time point, a data field length identifier and a data field.
5. A computer device comprising a memory, a processor, and a satellite data transmission program stored on the memory and executable on the processor, wherein the satellite data transmission program, when executed by the processor, implements the satellite data transmission method as claimed in any one of claims 1-2.
6. A non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the satellite data transmission method as claimed in any one of claims 1-2.
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| CN112468510A (en) * | 2020-12-11 | 2021-03-09 | 中国科学院上海高等研究院 | Transmission method and equipment based on SMT protocol and ALC protocol compatibility |
| CN113268551A (en) * | 2021-05-18 | 2021-08-17 | 朱厚强 | Data monitoring method and device for unified measurement and control system |
| CN114025031A (en) * | 2022-01-04 | 2022-02-08 | 北京航天驭星科技有限公司 | Data processing method and device based on ground measurement and control system data transmission protocol |
| CN116506526A (en) * | 2023-03-23 | 2023-07-28 | 航天行云科技有限公司 | Satellite data processing method and system based on configurable protocol parser |
| CN116962539A (en) * | 2023-07-24 | 2023-10-27 | 北京和德宇航技术有限公司 | Data packet generation method, device, equipment and storage medium |
| CN117896446A (en) * | 2024-03-15 | 2024-04-16 | 中国人民解放军63921部队 | Data transmission method and medium |
| CN117896446B (en) * | 2024-03-15 | 2024-06-04 | 中国人民解放军63921部队 | Data transmission method and medium |
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