CN106686079B - Wireless remote file transmission system based on QAM - Google Patents
Wireless remote file transmission system based on QAM Download PDFInfo
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- CN106686079B CN106686079B CN201611235669.4A CN201611235669A CN106686079B CN 106686079 B CN106686079 B CN 106686079B CN 201611235669 A CN201611235669 A CN 201611235669A CN 106686079 B CN106686079 B CN 106686079B
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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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]
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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
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
- H04L67/1074—Peer-to-peer [P2P] networks for supporting data block transmission mechanisms
- H04L67/1078—Resource delivery mechanisms
- H04L67/108—Resource delivery mechanisms characterised by resources being split in blocks or fragments
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
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Abstract
The invention discloses a QAM-based wireless remote file transmission system, which comprises a monitoring center: decomposing, packaging and encrypting a file to be remotely transmitted; a radio station transmitting station: the system is used as shore-based equipment, receives a file packet from a monitoring center, transmits the file packet to a transmitting station through a transmitter, and then broadcasts the file packet through the transmitting station; the remote terminal receiver: as the shipborne equipment, receiving wireless packet information from a radio station transmitting station, verifying, decrypting, packaging, combining and generating a file for the received wireless packet; the monitoring center is connected with the radio station transmitting station through a network; the radio station transmitting station and the remote terminal receiver are connected by radio waves. The wireless remote file transmission system based on QAM provided by the invention utilizes the transmitter of the radio station transmitting station to provide remote file transmission, is safe and reliable, and meets the transmission requirements of remote large files in navigation, aviation, mountainous and polar applications in a wireless state.
Description
Technical Field
The present invention relates to a wireless remote file transmission system, and more particularly, to a wireless remote file transmission system based on QAM (quadrature amplitude Modulation).
Background
NAVDAT is a new generation of digital marine safety information broadcasting system, the data transmission rate reaches 15-25kb/s, the offshore coverage reaches 350 nautical miles, files in various formats such as texts, pictures, diagrams, images, electronic chart updating packages and the like can be transmitted at high speed, the requirement of continuously increasing data volume of coastal safety information can be met, and the system is composed of a coastal transmitting station and shipborne equipment and is a novel digital navigation aid system and equipment integrating a network technology, a modern communication technology, a computer technology, an electronic information display technology and a radio communication technology.
The marine safety information broadcasting system broadcasts characters or documents outwards through the broadcasting system, so that adjacent ships and a shore station can timely master dynamic and static information of all ships on the near sea surface, mutual communication and coordination can be realized immediately, necessary avoidance actions are taken, and great help is brought to the safety of the ships.
However, the existing radio station transmitting station can only be used for transmitting simple text signaling, and cannot provide remote file transmission under the conditions of navigation, aviation, deep mountains and polar regions.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a QAM-based wireless remote file transmission system, which can provide remote file transmission by using a transmitter of a radio station transmitting station, is safe and reliable, and meets the transmission requirement of remote large files in navigation, aviation, deep mountains and polar applications in a wireless state.
The technical scheme adopted by the invention for solving the technical problems is to provide a QAM-based wireless remote file transmission system, which comprises a monitoring center: decomposing, packaging and encrypting a file to be remotely transmitted; a radio station transmitting station: the system is used as shore-based equipment, receives a file packet from a monitoring center, sends the file packet to a transmitting station through a transmitter, and then broadcasts the file packet through the transmitting station; the remote terminal receiver: as the shipborne equipment, receiving wireless packet information from a transmitting station of a radio station transmitting station, verifying, decrypting, grouping, combining and generating a file for the received wireless packet; the monitoring center is connected with the radio station transmitting station through a network; the radio station transmitting station and the remote terminal receiver are connected by radio waves.
The above-mentioned QAM-based wireless remote file transmission system, wherein the monitoring center uses a file package with a fixed size, the shortage is complemented with 0, the file distribution mode is divided into 4QAM1/2,4QAM 3/4,16QAM1/2,16QAM 3/4,64 QAM1/2 and 64QAM 3/4, and the corresponding transmission distance is 350 nautical miles to 90 nautical miles.
In the QAM-based wireless remote file transmission system, a plurality of transmitters are disposed in the radio station transmitting station, and a broadcast control middleware is disposed on the radio station transmitting station and configured to receive file packets from a monitoring center in a unified manner, and after checking is correct, combine the file packets into segment packets and store the segment packets; the transmitters are connected with respective transmitting stations through serial ports and are uniformly scheduled by a transmitting control middleware; the broadcasting control middleware calculates a transmitting station in an idle state according to the state of the transmitting station and transmits data to the transmitting station; meanwhile, the state of the current transmitting station is fed back to the transmitting control middleware; and clearing the section packet data of the broadcasting control middleware after the transmission is finished, and rolling back the data to the broadcasting control middleware after an error occurs to wait for retransmission.
In the QAM-based wireless remote file transmission system, the transmitting station transmits the file and then transmits the transmitted data back to the monitoring center via the WEB service for query statistics and analysis; and the remote terminal receiver transmits data back to the monitoring center under the condition of network connection.
Compared with the prior art, the invention has the following beneficial effects: the wireless remote file transmission system based on QAM provided by the invention utilizes the transmitter of the radio station transmitting station to provide remote file transmission, is safe and reliable, and meets the transmission requirements of remote large files in navigation, aviation, mountainous and polar applications in a wireless state.
Drawings
FIG. 1 is a schematic diagram of a QAM based wireless remote file transfer system architecture according to the present invention;
FIG. 2 is a diagram illustrating a QAM-based wireless remote file transmission process according to the present invention.
Detailed Description
The invention is further described below with reference to the figures and examples.
FIG. 1 is a schematic diagram of a QAM based wireless remote file transfer system architecture according to the present invention; FIG. 2 is a diagram illustrating a QAM-based wireless remote file transmission process according to the present invention.
Referring to fig. 1 and fig. 2, the QAM-based wireless remote file transmission system provided in the present invention includes a monitoring center: decomposing, packaging and encrypting a file to be remotely transmitted;
a radio station transmitting station: the system is used as shore-based equipment, receives a file packet from a monitoring center, sends the file packet to a transmitting station through a transmitter, and then broadcasts the file packet through the transmitting station;
the remote terminal receiver: as the shipborne equipment, receiving wireless packet information from a radio station transmitting station, verifying, decrypting, packaging, combining and generating a file for the received wireless packet;
the monitoring center is connected with the radio station transmitting station through a network; the radio station transmitting station and the remote terminal receiver are connected through radio waves, and the principle of radio propagation, namely the electromagnetic induction theory, is used.
The wireless remote file transmission system based on QAM provided by the invention decomposes, packs, segments and encrypts the files to be remotely transmitted through broadcasting software. The computer transmits the package of the file to the transmitter by the serial port in a segmented way, then the package of the file is sent to the transmitting station by the transmitter, and then the package of the file is broadcast by the transmitting station. The receiving software receives the wireless packet information transmitted by the transmitting station through the receiver, checks, decrypts, splices the packet, combines the packet, the security segment and generates a file. The functions and implementations of the main modules are as follows.
One, file broadcasting
1. File decomposition, packaging and segmentation
The file is decomposed into one or more packets according to a certain coding format and a certain broadcasting mode, the size of the packets is fixed (the shortage part is complemented by 0), the sizes of different modes are different, and the file broadcasting modes are divided into 6 types of 4QAM1/2,4QAM 3/4,16QAM1/2,16 QAM1/2, 64QAM 1/2 and 64QAM 3/4; and splitting the decomposed packet into a plurality of segments in sequence, wherein the packet number of the last segment is uncertain, and the packet numbers of other segments are fixed.
2. And the WEB control center broadcasts the large file according to sections.
Second, file broadcasting control middleware
1. And receiving the file packets transmitted according to the segments through the network, checking the file packets correctly, combining the file packets into segment packets, and storing the segment packets.
2. The current idle transmitting terminal software T is obtained by monitoring the current states of the transmitting terminal software 1 to the transmitting terminal software N, the data of the section packet is transmitted to the transmitting terminal software T, the section packet data of the broadcasting control middleware is cleared after the transmission is finished, and the data is rolled back to the broadcasting control middleware after errors occur to wait for retransmission!
Third, transmitting terminal software
1. The software T of the transmitting terminal receives the data (section packet) transmitted by the data of the broadcasting control middleware and transmits the data to the transmitter T
2. And after the data is transmitted to the transmitter, the state of the current transmitting end is simultaneously fed back to the file broadcasting control middleware.
Four, transmitter
1. The transmitter mainly functions in that data received by the transmitting terminal software T is transmitted to the transmission control middleware through a certain mode.
Fifth, launch control middleware
1. After receiving the data (section packet), the transmission control middleware calculates the transmitting station T in an idle state according to the state of the transmitting station and transmits the data to the transmitting station.
2. After the data is transmitted to the transmitting station, the state of the current transmitting station is fed back to the transmitting control middleware at the same time.
Sixthly, launching pad
1. The number of the transmitting stations can be multiple, after the transmitter T transmits the data to the transmitting stations T, the transmitting stations T broadcast the data in different modes through radio waves, and the transmission distances are different in the different modes.
Seventh, terminal receiver
1. The terminal receivers are multiple, and the main functions of the terminal receivers are to receive the data packet transmitted by the transmitting station and transmit the data to the receiving control middleware.
Eight, receiving control middleware
1. After receiving the data (segment packet) transmitted by the terminal receiver, the receiving control middleware calculates the receiving software T in an idle state according to the state of the receiving end software, transmits the data to the receiving software T and simultaneously feeds back the state of the receiving software to the receiving control middleware.
Nine, receiving software
1. After receiving the data of the terminal receiver, the receiving software combines and generates a file according to a certain rule after the data is spliced and packaged and the data is assembled.
2. And after the receiving is finished, the state is also fed back to the receiving control middleware.
3. After the received data packet is packaged, the received data can be transmitted to a WEB terminal control center.
Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. A QAM-based wireless remote file transfer system, comprising:
the monitoring center: decomposing, packaging, segmenting and encrypting a file to be remotely transmitted;
a radio station transmitting station: the system is used as shore-based equipment, receives a file packet from a monitoring center, sends the file packet to a transmitting station through a transmitter, and then broadcasts the file packet through the transmitting station;
the remote terminal receiver: as the shipborne equipment, receiving wireless packet information from a radio station transmitting station, verifying, decrypting, packaging, combining and generating a file for the received wireless packet;
the monitoring center is connected with the radio station transmitting station through a network; the radio station transmitting station is connected with the remote terminal receiver through radio waves;
the monitoring center decomposes files by adopting a file packet with fixed size, the shortage part is complemented by 0, the file broadcasting mode is divided into 4QAM1/2,4QAM 3/4,16QAM1/2,16QAM 3/4,64 QAM1/2 and 64QAM 3/4, and the corresponding transmission distance is 350-90 nautical miles; the monitoring center divides the decomposed packets into a plurality of segments in sequence, the packet number of the last segment is uncertain, the packet numbers of other segments are fixed, and the large file is broadcasted out in segments;
the broadcasting control middleware is arranged on the radio station transmitting station and used for uniformly receiving the file packets from the monitoring center, and after the file packets are checked to be correct, the file packets are combined into section packets and stored; the transmitters are connected with respective transmitting stations through serial ports and are uniformly scheduled by a transmitting control middleware; the broadcasting control middleware calculates a transmitting station in an idle state according to the state of the transmitting station and transmits data to the transmitting station; meanwhile, the state of the current transmitting station is fed back to the transmitting control middleware; and clearing the section packet data of the broadcasting control middleware after the transmission is finished, and rolling back the data to the broadcasting control middleware after an error occurs to wait for retransmission.
2. The QAM-based wireless remote file transfer system of claim 1, wherein the transmitting station transmits the file and then transmits the transmitted data back to the monitoring center via WEB services for query statistics and analysis; and the remote terminal receiver transmits data back to the monitoring center under the condition of network connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611235669.4A CN106686079B (en) | 2016-12-28 | 2016-12-28 | Wireless remote file transmission system based on QAM |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611235669.4A CN106686079B (en) | 2016-12-28 | 2016-12-28 | Wireless remote file transmission system based on QAM |
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| CN106686079A CN106686079A (en) | 2017-05-17 |
| CN106686079B true CN106686079B (en) | 2020-03-27 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992828B (en) * | 2017-06-01 | 2023-11-21 | 上海埃威航空电子有限公司 | Marine intermediate frequency digital broadcasting system |
| CN107040390A (en) * | 2017-06-01 | 2017-08-11 | 上海埃威航空电子有限公司 | The marine wireless chart update system and method for intermediate frequency |
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| CN103220268A (en) * | 2013-03-01 | 2013-07-24 | 上海交通大学 | Airborne ultrashort wave multimedia communication system |
| CN103269486A (en) * | 2013-04-19 | 2013-08-28 | 北京航空航天大学 | Air-ground data transmission method, device and system |
| CN104038271A (en) * | 2014-05-16 | 2014-09-10 | 中国人民解放军空军工程大学 | OFDM technology-based airborne two-antenna simultaneous communication method |
| CN105611367A (en) * | 2015-12-29 | 2016-05-25 | 深圳多尼卡互联技术有限公司 | Method for transmitting data to aircraft, ground device, airborne device and airborne system |
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| CN106209163A (en) * | 2016-06-21 | 2016-12-07 | 中国科学院半导体研究所 | Based on microwave communication and the frequency-hopping communication system of spacing wireless optic communication dual link |
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2016
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Patent Citations (7)
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| CN101848188A (en) * | 2009-03-25 | 2010-09-29 | 上海聚力传媒技术有限公司 | Method and device for updating data block checking information |
| CN103220268A (en) * | 2013-03-01 | 2013-07-24 | 上海交通大学 | Airborne ultrashort wave multimedia communication system |
| CN103269486A (en) * | 2013-04-19 | 2013-08-28 | 北京航空航天大学 | Air-ground data transmission method, device and system |
| CN104038271A (en) * | 2014-05-16 | 2014-09-10 | 中国人民解放军空军工程大学 | OFDM technology-based airborne two-antenna simultaneous communication method |
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| CN106686079A (en) | 2017-05-17 |
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