CN111953400A - Task-driven low-orbit satellite broadcast distribution device, method, system and medium - Google Patents
Task-driven low-orbit satellite broadcast distribution device, method, system and medium Download PDFInfo
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- CN111953400A CN111953400A CN202010718729.8A CN202010718729A CN111953400A CN 111953400 A CN111953400 A CN 111953400A CN 202010718729 A CN202010718729 A CN 202010718729A CN 111953400 A CN111953400 A CN 111953400A
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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
- H04B7/18523—Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service
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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
- H04B7/18519—Operations control, administration or maintenance
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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
- H04B7/18523—Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service
- H04B7/18526—Arrangements for data linking, networking or transporting, or for controlling an end to end session
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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
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a task-driven low-orbit satellite broadcast distribution device, method, system and medium, comprising: the device comprises a routing unit, a storage unit, a framing unit, an encryption unit, a coding and scrambling unit, a rate control unit and a radio frequency processing unit. The invention can carry out storage playback broadcasting or real-time broadcasting control on data to be distributed according to the working condition and the receiving capability of the ground terminal in the fly-by area, has the capability of adjusting multi-gear transmission rate, has the advantages of high distribution efficiency, good task adaptability, compatibility with real-time broadcasting, simple engineering realization and the like, and provides reference and basis for the distribution design of satellite data broadcasting in the future.
Description
Technical Field
The invention relates to the technical field of satellite data transmission, in particular to a task-driven low-orbit satellite broadcast distribution design device and method.
Background
The main task of the satellite data broadcast distribution system is to format, encode, scramble, modulate and power amplify the information after the satellite is processed by target identification, compression and the like, and to perform data broadcast to the ground multi-user terminal. Through the data broadcast distribution system, the satellite can directly send small data volume information which is urgently needed by a user to the user terminal through the broadcast distribution link, and the risks of time delay and data loss caused by many traditional transmission links such as satellite-ground data transmission and relay data transmission are avoided. Meanwhile, the satellite broadcast distribution system can broadcast to a plurality of terminals in the ground coverage area at the same time, and the ground user terminal can receive data at the same time, so that the tactical application capacity of satellite data can be greatly improved.
In order to effectively improve the tactical application capability of the satellite system, more and more satellites are equipped with data broadcasting distribution systems, but some problems still exist. On one hand, the system directly broadcasts and distributes information of the satellite after target recognition, compression and other processing, data are not stored or real-time broadcast path analysis and control are not carried out according to task requirements, and if no receiving terminal exists in the current satellite flying area or the receiving terminal is in the next target area, distributed data acquired on the satellite are transmitted inefficiently. On the other hand, the broadcast distribution rate of the system is designed for a fixed code rate, so that the use requirements of user terminals with different receiving capacities on the ground cannot be met, and the application effect of satellite broadcast distribution is reduced.
Patent document CN106788674A (201611102623.5) discloses a data broadcast distribution unit for a small satellite, which adopts the design concepts of integration, integration and miniaturization, and meets the practical requirements of a small satellite platform on small load volume, light weight and low power consumption. However, the design does not store or analyze and control the broadcast path in real time for the data to be distributed according to the task requirement, and meanwhile, the design is designed for a fixed rate, so that the problem of satellite data broadcast distribution according to the task requirement, which is provided by the invention, cannot be solved.
Patent document CN107070539A (201710304969.1) discloses a marine satellite data broadcasting system, which is composed of a ground main control station, a bidirectional small station, a single receiving small station, and the like, and realizes wide-area and efficient information broadcasting distribution capability and a security authorization mechanism. The design carries out satellite broadcast data receiving design of a ground terminal station, and cannot solve the problem of satellite data broadcast distribution aiming at task requirements.
Disclosure of Invention
In view of the defects in the prior art, it is an object of the present invention to provide a task-driven low-earth orbit satellite broadcast distribution apparatus, method, system and medium.
The invention provides a task-driven-based low-earth orbit satellite broadcast distribution device, which comprises: the system comprises a routing unit, a storage unit, a framing unit, an encryption unit, a coding and scrambling unit, a rate control unit and a radio frequency processing unit;
the routing unit is positioned at the left side of the storage unit and the framing unit and is connected with the storage unit and the framing unit;
the framing unit is positioned at the right side of the storage unit and is connected with the storage unit;
the encryption unit is positioned at the right side of the framing unit and is connected with the framing unit;
the coding scrambling unit is positioned on the right side of the encryption unit and connected with the encryption unit;
the rate control unit is positioned at the lower side of the routing unit, the framing unit, the encryption unit and the coding scrambling unit and is connected with the routing unit, the framing unit, the encryption unit and the coding scrambling unit;
the radio frequency processing unit is positioned on the right side of the coding scrambling unit and connected with the coding scrambling unit.
The task-driven-based low-orbit satellite broadcast distribution method provided by the invention comprises the following steps of:
step 1: storing the playback broadcast;
step 2: performing real-time broadcasting;
and step 3: and performing stepping control on the broadcast distribution rate.
Preferably, the store playback broadcast includes: when no receiving terminal exists in the satellite fly-by area, receiving information of the satellite after target recognition and compression processing, sending the information to a storage unit for recording, and adding a task identifier; when a receiving terminal is in the satellite fly-by area, the data corresponding to the task identifier is read according to the task requirement, and the data is processed by the framing unit, the encryption unit, the coding scrambling unit and the radio frequency processing unit, and then broadcast and distributed to the ground terminal.
Preferably, the real-time broadcasting includes: when a receiving terminal is arranged in a satellite fly-by area, the information of the satellite after target identification and compression processing is received, and then the information is processed by a framing unit, an encryption unit, a coding scrambling unit and a radio frequency processing unit, and then the real-time broadcast distribution is directly carried out on the ground terminal.
Preferably, the step control of the broadcast distribution rate includes: when the satellite flies through different areas, the on-satellite broadcast distribution rate is set according to the receiving capability of the ground receiving terminal, and the speed gears comprise 8kbps, 32kbps, 64kbps, 128kbps, 256kbps and 512 kbps.
The task-driven-based low-earth orbit satellite broadcasting distribution system provided by the invention comprises the following modules:
module M1: storing the playback broadcast;
module M2: performing real-time broadcasting;
module M3: and performing stepping control on the broadcast distribution rate.
Preferably, the store playback broadcast includes: when no receiving terminal exists in the satellite fly-by area, receiving information of the satellite after target recognition and compression processing, sending the information to a storage unit for recording, and adding a task identifier; when a receiving terminal is in the satellite fly-by area, the data corresponding to the task identifier is read according to the task requirement, and the data is processed by the framing unit, the encryption unit, the coding scrambling unit and the radio frequency processing unit, and then broadcast and distributed to the ground terminal.
Preferably, the real-time broadcasting includes: when a receiving terminal is arranged in a satellite fly-by area, the information of the satellite after target identification and compression processing is received, and then the information is processed by a framing unit, an encryption unit, a coding scrambling unit and a radio frequency processing unit, and then the real-time broadcast distribution is directly carried out on the ground terminal.
Preferably, the step control of the broadcast distribution rate includes: when the satellite flies through different areas, the on-satellite broadcast distribution rate is set according to the receiving capability of the ground receiving terminal, and the speed gears comprise 8kbps, 32kbps, 64kbps, 128kbps, 256kbps and 512 kbps.
According to the present invention, a computer-readable storage medium is provided, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the method as described above.
Compared with the prior art, the invention has the following beneficial effects:
by designing the low-orbit satellite broadcast distribution design device and method based on task driving, the invention can carry out storage playback broadcast or real-time broadcast control on data to be distributed according to the working condition and receiving capacity of the ground terminal in the fly-by area, has the capability of adjusting multi-gear transmission rate, has the advantages of high distribution efficiency, good task adaptability, compatibility with real-time broadcast, simple engineering realization and the like, and provides reference and basis for the distribution design of satellite data broadcast in the future.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram of the task-driven low-earth orbit satellite broadcast distribution design device according to the present invention;
FIG. 2 is a schematic diagram of a broadcast mode of operation for memory playback according to the present invention;
FIG. 3 is a schematic diagram of a real-time broadcasting operation mode according to the present invention;
FIG. 4 is a diagram illustrating a rate-shifting control scheme according to the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example (b):
as shown in fig. 1, the task-driven low-earth orbit satellite broadcast distribution design device of the present invention includes a routing unit, a storage unit, a framing unit, an encryption unit, a coding and scrambling unit, a rate control unit, and a radio frequency processing unit. The route selection unit is positioned on the left side of the storage unit and the framing unit and is connected with the storage unit and the framing unit, the framing unit is positioned on the right side of the storage unit and is connected with the storage unit, the encryption unit is positioned on the right side of the framing unit and is connected with the framing unit, the coding and scrambling unit is positioned on the right side of the encryption unit and is connected with the encryption unit, the rate control unit is positioned on the lower side of the route selection unit, the framing unit, the encryption unit and the coding and scrambling unit and is connected with the route selection unit, the framing unit, the encryption unit and the coding and scrambling unit, and the radio frequency processing unit is positioned on the right side of the coding and scrambling unit and is connected with the coding and scrambling.
The routing selection unit completes routing control of input distribution data according to task requirements, transmits the data to the framing unit when real-time broadcasting distribution is needed, and transmits the data to the storage unit when storage is needed;
the storage unit is used for finishing the storage of the data output by the routing unit, and reading and sending the data to the framing unit when the broadcast distribution needs to be played back;
the framing unit correspondingly formats the data according to the data format requirement of the data broadcast distribution link;
the encryption unit completes encryption processing of real-time broadcast distribution data or playback broadcast distribution data;
the coding and scrambling unit completes coding and scrambling processing of real-time broadcast distribution data or playback broadcast distribution data;
the rate control unit completes rate stepping control of real-time broadcast distribution data or playback broadcast distribution data, and can be divided into different rate modes such as 8kbps, 32kbps, 64kbps, 128kbps, 256kbps and 512 kbps;
the radio frequency processing unit completes the processing of spread spectrum modulation, QPSK modulation, power amplification, filtering and the like of real-time broadcast distribution data or playback broadcast distribution data, and sends the processed radio frequency signals to the broadcast distribution antenna.
The invention relates to a low-orbit satellite broadcast distribution design method based on task driving, which comprises the following steps:
designing a storage playback broadcast working mode;
designing a real-time broadcasting working mode;
and step three, designing a rate grading control mode.
As shown in fig. 2, the broadcast distribution data storage playback broadcast operating mode refers to that when there is no receiving terminal in a satellite flight area, information of the satellite after processing such as target recognition and compression is received and then sent to a storage unit for recording, and meanwhile, a task identifier is added. When a receiving terminal exists in a satellite fly-by area, data corresponding to a task identifier is read according to task requirements, and broadcast distribution is performed on a ground terminal after the data are processed by a framing unit, an encryption unit, a coding scrambling unit, a radio frequency processing unit and the like.
As shown in fig. 3, the real-time broadcast operation mode of broadcast distribution data refers to that when there is a receiving terminal in a satellite flight area, the receiving terminal directly transmits information processed by target identification, compression, and the like of a satellite to a framing unit, an encryption unit, a coding and scrambling unit, a radio frequency processing unit, and the like, and then directly performs real-time broadcast distribution on a ground terminal.
As shown in fig. 4, the rate-stepping control mode is a mode in which an on-board broadcast distribution rate is set according to the reception capability of a ground reception terminal when a satellite travels through different areas, and has different rate steps such as 8kbps, 32kbps, 64kbps, 128kbps, 256kbps, and 512 kbps.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A task-driven low-earth orbit satellite broadcast distribution apparatus, comprising: the system comprises a routing unit, a storage unit, a framing unit, an encryption unit, a coding and scrambling unit, a rate control unit and a radio frequency processing unit;
the routing unit is positioned at the left side of the storage unit and the framing unit and is connected with the storage unit and the framing unit;
the framing unit is positioned at the right side of the storage unit and is connected with the storage unit;
the encryption unit is positioned at the right side of the framing unit and is connected with the framing unit;
the coding scrambling unit is positioned on the right side of the encryption unit and connected with the encryption unit;
the rate control unit is positioned at the lower side of the routing unit, the framing unit, the encryption unit and the coding scrambling unit and is connected with the routing unit, the framing unit, the encryption unit and the coding scrambling unit;
the radio frequency processing unit is positioned on the right side of the coding scrambling unit and connected with the coding scrambling unit.
2. A task-driven low-earth-orbit satellite broadcast distribution method, characterized in that the task-driven low-earth-orbit satellite broadcast distribution apparatus of claim 1 is adopted, comprising the steps of:
step 1: storing the playback broadcast;
step 2: performing real-time broadcasting;
and step 3: and performing stepping control on the broadcast distribution rate.
3. The task-driven low-earth-orbit satellite broadcast distribution method according to claim 2, wherein the store playback broadcast includes: when no receiving terminal exists in the satellite fly-by area, receiving information of the satellite after target recognition and compression processing, sending the information to a storage unit for recording, and adding a task identifier; when a receiving terminal is in the satellite fly-by area, the data corresponding to the task identifier is read according to the task requirement, and the data is processed by the framing unit, the encryption unit, the coding scrambling unit and the radio frequency processing unit, and then broadcast and distributed to the ground terminal.
4. The task-driven low-earth-orbit satellite broadcast distribution method according to claim 2, wherein the real-time broadcast includes: when a receiving terminal is arranged in a satellite fly-by area, the information of the satellite after target identification and compression processing is received, and then the information is processed by a framing unit, an encryption unit, a coding scrambling unit and a radio frequency processing unit, and then the real-time broadcast distribution is directly carried out on the ground terminal.
5. The task-driven low-earth-orbit satellite broadcast distribution method according to claim 2, wherein the step control of the broadcast distribution rate comprises: when the satellite flies through different areas, the on-satellite broadcast distribution rate is set according to the receiving capability of the ground receiving terminal, and the speed gears comprise 8kbps, 32kbps, 64kbps, 128kbps, 256kbps and 512 kbps.
6. A task-driven low-earth-orbit satellite broadcasting distribution system, which is characterized in that the task-driven low-earth-orbit satellite broadcasting distribution device of claim 1 is adopted, and comprises the following modules:
module M1: storing the playback broadcast;
module M2: performing real-time broadcasting;
module M3: and performing stepping control on the broadcast distribution rate.
7. The task-driven low-earth-orbit satellite-broadcast-based distribution system according to claim 6, wherein the store-playback broadcasting includes: when no receiving terminal exists in the satellite fly-by area, receiving information of the satellite after target recognition and compression processing, sending the information to a storage unit for recording, and adding a task identifier; when a receiving terminal is in the satellite fly-by area, the data corresponding to the task identifier is read according to the task requirement, and the data is processed by the framing unit, the encryption unit, the coding scrambling unit and the radio frequency processing unit, and then broadcast and distributed to the ground terminal.
8. The task-driven low-earth-orbit satellite broadcast-based distribution system according to claim 6, wherein the real-time broadcast includes: when a receiving terminal is arranged in a satellite fly-by area, the information of the satellite after target identification and compression processing is received, and then the information is processed by a framing unit, an encryption unit, a coding scrambling unit and a radio frequency processing unit, and then the real-time broadcast distribution is directly carried out on the ground terminal.
9. The task-driven low-earth-orbit satellite broadcast distribution system according to claim 6, wherein the stepping control of the broadcast distribution rate comprises: when the satellite flies through different areas, the on-satellite broadcast distribution rate is set according to the receiving capability of the ground receiving terminal, and the speed gears comprise 8kbps, 32kbps, 64kbps, 128kbps, 256kbps and 512 kbps.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 2 to 5.
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