CN107147435B - Satellite broadcast data ground fixed two-way station and data transmission method thereof - Google Patents
Satellite broadcast data ground fixed two-way station and data transmission method thereof Download PDFInfo
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- CN107147435B CN107147435B CN201710307598.2A CN201710307598A CN107147435B CN 107147435 B CN107147435 B CN 107147435B CN 201710307598 A CN201710307598 A CN 201710307598A CN 107147435 B CN107147435 B CN 107147435B
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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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- 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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/1858—Arrangements for data transmission on the physical system, i.e. for data bit transmission between network components
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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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18582—Arrangements for data linking, i.e. for data framing, for error recovery, for multiple access
-
- 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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18586—Arrangements for data transporting, e.g. for an end to end data transport or check
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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
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/12—Messaging; Mailboxes; Announcements
- H04W4/14—Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
Abstract
The invention discloses a satellite broadcast data ground fixed two-way station and a data transmission method thereof, comprising a system management control platform: the system mainly comprises a main control unit, a user gateway and a user interface; an antenna feeder system: mainly comprises a ground fixed station antenna with a transceiving function and a radio frequency unit with the transceiving function; the system application software comprises: the system comprises marine remote sensing data satellite broadcasting two-way station application software; the system comprises IDU equipment, a Beidou user machine, an A-TDM modulator/demodulator, an encryption/decryption unit and a Beidou transceiver module; the ground fixed bidirectional station receives and transmits satellite broadcast signals through the antenna feed system and the master control unit performs unified control and management on data information to be received and transmitted and Beidou information transmitted by the Beidou receiving and transmitting module; and sending an information on-demand application or query request to the publishing center through the Beidou transmitting and receiving module, and uploading the position information of the Beidou transmitting and receiving module. The invention realizes wide-area and high-efficiency information broadcasting distribution capability and a safety authorization mechanism, and realizes conditional reception of marine remote sensing data.
Description
Technical Field
The invention relates to the field of satellite communication, in particular to a satellite broadcast data ground fixed two-way station and a data transmission method thereof.
Background
At present, in China, maritime satellite (inmarsat), Shuraya (Thuraya), Iridium and other foreign satellite communication system products are generally adopted for satellite communication, and although the communication quality is high, the products belong to narrow-band communication, the transmission rate is low, and high-speed communication services such as multimedia and the like cannot be realized. Meanwhile, the problems of high after-sale maintenance price and time delay of foreign products are difficult to solve.
Compared with foreign countries, the domestic satellite communication technology level is far away, and particularly in the aspects of civil satellite systems and application technologies, the domestic satellite communication technology is still in the starting stage. For many years, domestic satellite applications including satellite phones, satellite broadcasting, broadband satellite communication and the like mainly depend on foreign systems and devices, the satellite systems and satellite terminal technologies are also limited by foreign manufacturers, and the safety and reliability of satellite communication are not effectively guaranteed. At present, no broadband satellite communication system developed specially aiming at the characteristics of large forward data volume, small backward data volume and the like of a marine remote sensing data distribution system exists at home and abroad.
In recent years, with the development of satellite communication technology and the attention of China to satellite communication, China has made certain progress in the field of satellite communication. The satellite communication system independently developed in China basically can meet military requirements, but no mature solution of a commercial satellite communication system exists in the civil market at present, and the solution clearly contrasts with the domestic huge market requirements. The domestic broadband satellite communication system has huge market potential.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a satellite broadcast data ground fixed bidirectional station and a data transmission method thereof, which are suitable for a satellite communication system with large forward data volume and small backward data volume of a marine remote sensing data distribution system.
The purpose of the invention is realized by the following technical scheme:
satellite broadcast data ground fixed two-way station, characterized by comprising:
a system management control platform: mainly composed of a main control unit, a user gateway and a user interface
An antenna feeder system: mainly comprises a ground fixed station antenna with a transceiving function and a radio frequency unit with the transceiving function;
the system application software comprises: the system comprises marine remote sensing data satellite broadcasting two-way station application software;
the system comprises IDU equipment, a Beidou user machine, an A-TDM modulator/demodulator, an encryption/decryption unit and a Beidou transceiver module;
the ground fixed bidirectional station receives and transmits satellite broadcast signals through the antenna feed system and the master control unit performs unified control and management on data information to be received and transmitted and Beidou information transmitted by the Beidou receiving and transmitting module; and sending an information on-demand application or query request to the publishing center through the Beidou transmitting and receiving module, and uploading the position information of the Beidou transmitting and receiving module.
As a further improvement of the scheme, a receiving unit of the ground fixed bidirectional station receives satellite broadcast signals through a ground fixed station antenna unit, the satellite broadcast signals are processed by a radio frequency unit and then sent to a baseband for demodulation and decryption processing of an A-TDM demodulator of the signals, the signals are sent to a main control unit through a user gateway and a user interface, and the main control unit performs unified control and management on forward release information and Beidou information sent by a Beidou transmitting and receiving module.
As a further improvement of the scheme, the transmitting unit of the ground fixed bidirectional station firstly carries out unified control and management on data information to be transmitted and Beidou information transmitted by a Beidou transmitting and receiving module by the main control unit, then the signals are encrypted and enter an A-TDM modulator for modulation, then the signals are transmitted to the antenna transmitting unit after being processed by the baseband and the radio frequency unit, and finally the signals are transmitted to the ground main control station by the satellite transponder.
As a further improvement of the scheme, the Beidou transceiver module comprises a Beidou antenna module, a Beidou module and an information processing module, and the Beidou module is communicated with the radio frequency unit through the Beidou antenna module and is connected with the main control unit through the information processing module.
As a further improvement of the scheme, the ground fixed bidirectional station sends an information on demand application or a query request to the publishing center through a Beidou short message transmission channel and uploads the position information of the ground fixed bidirectional station. The process comprises the steps that a user inputs an information request for requesting or inquiring through a main control unit, the information request is sent to a Beidou satellite through an information processing module and a Beidou antenna module of a Beidou transceiver module, and after the system carries out an authentication request on the information request, the data of the inquired or requested data are unicast or multicast to corresponding terminals, so that the information request and the inquired are returned.
The data transmission method of the satellite broadcast data ground fixed bidirectional station comprises the following steps:
a service sending processing flow:
s01, connecting a server to the Internet, receiving user data information through an FTP server of a system management control platform, and storing the user data information after processing;
s02, a user sends the processed data to IDU equipment in the form of an IP packet through application software, the equipment performs data packaging, LDPC forward error correction coding, scrambling, constellation mapping and forming filtering according to a self-defined superframe structure, and finally performs up-conversion to an L waveband;
s03, the antenna feed system up-converts the data to a Ku wave band and carries out filtering processing, meanwhile, the signals are amplified through a power amplifier, and finally, the data are sent to a broadcasting satellite through an antenna, so that the data service is sent;
receiving a business data flow;
s11, the antenna feed system transforms the Ku frequency band to an L frequency band after LNB down-conversion processing and carries out filtering processing;
s12. the signal of the L frequency band is sent to IDU equipment through a feeder line, the demodulation processing, LDPC decoding and de-encapsulation of the signal are completed, and finally IP packet data are obtained;
s13, the system management control platform analyzes and integrates the IP packet data to generate an original data file;
s14, after the received broadcast content is subjected to preliminary identification, classification, statistics and filtering, the received broadcast content is output to back-end data processing equipment;
s15, timely storing and deleting the received broadcast content, maintaining the disk space and ensuring the stable operation of the server;
the Beidou link processing flow comprises the following steps:
s21, the system management control platform sends a Beidou short message to the master station or the small station through application software, wherein the Beidou short message comprises contents such as a short message, an equipment state, a service state, a positioning application and the like;
s22, the IDU equipment analyzes the IP packet, extracts the content of the short message, and then sends the short message to the Beidou user machine through the RS232 serial port;
s23, a Beidou multi-frequency antenna, a radio frequency, a baseband and a main control board are integrated in the Beidou user machine, and after a series of processing, the short message is finally sent to the Beidou satellite.
The satellite broadcast data ground fixed bidirectional station data transmission method further comprises a Beidou return link, and the processing flow of the Beidou return link is the same as that of the Beidou forward link.
The invention has the beneficial effects that: the ground fixed bidirectional station can realize point-to-point bidirectional data communication between the return service link and the main control station besides the return northbound link, so that the user experience is greatly improved through high-speed and high-capacity bidirectional data interaction, and greater economic benefit is realized while high-quality service is provided for users.
Drawings
FIG. 1 is a schematic diagram of a satellite broadcast data ground fixed two-way station system;
fig. 2 is a schematic diagram of data transmission according to the present invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in figure 1 of the drawings, in which,
satellite broadcast data ground fixed two-way station, characterized by comprising:
a system management control platform: mainly composed of a main control unit, a user gateway and a user interface
An antenna feeder system: mainly comprises a ground fixed station antenna with a transceiving function and a radio frequency unit with the transceiving function;
the system application software comprises: the system comprises marine remote sensing data satellite broadcasting two-way station application software;
the system comprises IDU equipment, a Beidou user machine, an A-TDM modulator/demodulator, an encryption/decryption unit and a Beidou transceiver module;
the ground fixed bidirectional station receives and transmits satellite broadcast signals through the antenna feed system and the master control unit performs unified control and management on data information to be received and transmitted and Beidou information transmitted by the Beidou receiving and transmitting module; and sending an information on-demand application or query request to the publishing center through the Beidou transmitting and receiving module, and uploading the position information of the Beidou transmitting and receiving module.
As a further improvement of the scheme, a receiving unit of the ground fixed bidirectional station receives satellite broadcast signals through a ground fixed station antenna unit, the satellite broadcast signals are processed by a radio frequency unit and then sent to a baseband for demodulation and decryption processing of an A-TDM demodulator of the signals, the signals are sent to a main control unit through a user gateway and a user interface, and the main control unit performs unified control and management on forward release information and Beidou information sent by a Beidou transmitting and receiving module.
As a further improvement of the scheme, the transmitting unit of the ground fixed bidirectional station firstly carries out unified control and management on data information to be transmitted and Beidou information transmitted by a Beidou transmitting and receiving module by the main control unit, then the signals are encrypted and enter an A-TDM modulator for modulation, then the signals are transmitted to the antenna transmitting unit after being processed by the baseband and the radio frequency unit, and finally the signals are transmitted to the ground main control station by the satellite transponder.
As a further improvement of the scheme, the Beidou transceiver module comprises a Beidou antenna module, a Beidou module and an information processing module, and the Beidou module is communicated with the radio frequency unit through the Beidou antenna module and is connected with the main control unit through the information processing module.
As a further improvement of the scheme, the ground fixed bidirectional station sends an information on demand application or a query request to the publishing center through a Beidou short message transmission channel and uploads the position information of the ground fixed bidirectional station. The process comprises the steps that a user inputs an information request for requesting or inquiring through a main control unit, the information request is sent to a Beidou satellite through an information processing module and a Beidou antenna module of a Beidou transceiver module, and after the system carries out an authentication request on the information request, the data of the inquired or requested data are unicast or multicast to corresponding terminals, so that the information request and the inquired are returned.
The other equipment except the IDU equipment of the ground fixed bidirectional station are purchased with commercial equipment, the IDU complete machine of the core equipment single receiving station comprises a radio frequency unit, an A-TDM modem, a decryption unit, a user gateway, a user interface and a main control unit, and the specific indexes and parameters are as follows:
the core software marine remote sensing data satellite broadcasting single receiving station application software is also realized in a self-developed mode, and has the functions as shown in the following table:
as shown in fig. 2:
the data transmission method of the satellite broadcast data ground fixed bidirectional station comprises the following steps:
a service sending processing flow:
s01, connecting a server to the Internet, receiving user data information through an FTP server of a system management control platform, and storing the user data information after processing;
s02, a user sends the processed data to IDU equipment in the form of an IP packet through application software, the equipment performs data packaging, LDPC forward error correction coding, scrambling, constellation mapping and forming filtering according to a self-defined superframe structure, and finally performs up-conversion to an L waveband;
s03, the antenna feed system up-converts the data to a Ku wave band and carries out filtering processing, meanwhile, the signals are amplified through a power amplifier, and finally, the data are sent to a broadcasting satellite through an antenna, so that the data service is sent;
receiving a business data flow;
s11, the antenna feed system transforms the Ku frequency band to an L frequency band after LNB down-conversion processing and carries out filtering processing;
s12. the signal of the L frequency band is sent to IDU equipment through a feeder line, the demodulation processing, LDPC decoding and de-encapsulation of the signal are completed, and finally IP packet data are obtained;
s13, the system management control platform analyzes and integrates the IP packet data to generate an original data file;
s14, after the received broadcast content is subjected to preliminary identification, classification, statistics and filtering, the received broadcast content is output to back-end data processing equipment;
s15, timely storing and deleting the received broadcast content, maintaining the disk space and ensuring the stable operation of the server;
the Beidou link processing flow comprises the following steps:
s21, the system management control platform sends a Beidou short message to the master station or the small station through application software, wherein the Beidou short message comprises contents such as a short message, an equipment state, a service state, a positioning application and the like;
s22, the IDU equipment analyzes the IP packet, extracts the content of the short message, and then sends the short message to the Beidou user machine through the RS232 serial port;
s23, a Beidou multi-frequency antenna, a radio frequency, a baseband and a main control board are integrated in the Beidou user machine, and after a series of processing, the short message is finally sent to the Beidou satellite.
The satellite broadcast data ground fixed bidirectional station data transmission method further comprises a Beidou return link, and the processing flow of the Beidou return link is the same as that of the Beidou forward link.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. The data transmission method of the satellite broadcast data ground fixed bidirectional station is characterized by comprising the following steps:
a service sending processing flow:
s01, connecting a server to the Internet, receiving user data information through an FTP server of a system management control platform, and storing the user data information after processing;
s02, a user sends the processed data to IDU equipment in the form of an IP packet through application software, the equipment performs data packaging, LDPC forward error correction coding, scrambling, constellation mapping and forming filtering according to a self-defined superframe structure, and finally performs up-conversion to an L waveband;
s03, the antenna feed system up-converts the data to a Ku wave band and carries out filtering processing, meanwhile, the signals are amplified through a power amplifier, and finally, the data are sent to a broadcasting satellite through an antenna, so that the data service is sent;
receiving a business data flow;
s11, the antenna feed system transforms the Ku frequency band to an L frequency band after LNB down-conversion processing and carries out filtering processing;
s12. the signal of the L frequency band is sent to IDU equipment through a feeder line, the demodulation processing, LDPC decoding and de-encapsulation of the signal are completed, and finally IP packet data are obtained;
s13, the system management control platform analyzes and integrates the IP packet data to generate an original data file;
s14, after the received broadcast content is subjected to preliminary identification, classification, statistics and filtering, the received broadcast content is output to back-end data processing equipment;
s15, timely storing and deleting the received broadcast content, maintaining the disk space and ensuring the stable operation of the server;
the Beidou link processing flow comprises the following steps:
s21, the system management control platform sends a Beidou short message to the master station or the small station through application software, wherein the Beidou short message comprises a short message, an equipment state, a service state and a positioning application;
s22, the IDU equipment analyzes the IP packet, extracts the content of the short message, and then sends the short message to the Beidou user machine through the RS232 serial port;
s23, a Beidou multi-frequency antenna, a radio frequency, a baseband and a main control board are integrated in the Beidou user machine, and after a series of processing, the short message is finally sent to the Beidou satellite.
2. The data transmission method of a satellite broadcast data terrestrial fixed two-way station according to claim 1, wherein: the Beidou navigation system also comprises a Beidou return link, and the processing flow of the Beidou return link is the same as that of the Beidou forward link.
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| CN109257697B (en) * | 2018-10-30 | 2020-09-18 | 中国运载火箭技术研究院 | Implantable positioning module based on weak energy collection and communication method thereof |
| CN110324675A (en) * | 2019-06-26 | 2019-10-11 | 航天恒星科技有限公司 | The method and apparatus that signal quality monitoring is carried out to satellite broadcasting television system |
| CN111092649B (en) * | 2019-12-25 | 2021-09-28 | 武汉中原电子集团有限公司 | Single big dipper location fairway buoy based on global low orbit satellite communication |
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Address after: 610000 Building 1, No. 11, Gaopeng Avenue, Chengdu hi tech Zone, Chengdu, Sichuan Patentee after: Chengdu Guoheng Space Technology Engineering Co.,Ltd. Address before: No. 1 high tech Zone Gaopeng road in Chengdu city of Sichuan Province in 610041 Patentee before: CHENGDU GUOHENG SPACE TECHNOLOGY ENGINEERING Co.,Ltd. |