Satellite-oriented emergency communication system and high-speed short message transmission method thereof
A technology of emergency communication and transmission method, applied in the field of satellite-oriented emergency communication system and its high-speed short message transmission, can solve problems such as affecting transmission efficiency, packet loss, aggravating network congestion, etc., achieving simple service interface, effective transmission window, guarantee The effect of accuracy
Inactive Publication Date: 2019-04-02
南京控维通信科技有限公司
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Problems solved by technology
[0003] When it is necessary to transmit data, a more mature network transmission protocol is usually selected, such as TCP / IP or UDP, but the high delay of the satellite network will cause network congestion, and the high bit error rate will cause TCP packet loss, further aggravating the problem of network congestion , seriously affecting the transmission efficiency
UDP is similar, because the protocol itself does not guarantee the reliability of transmission, and serious packet loss is also the biggest problem affecting transmission efficiency
Method used
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[0016] The present invention will be further described below in conjunction with the accompanying drawings.
[0017] The message transmission logic of the system of the present invention is that the remote station sends the message to the central station, and then the central station forwards the message to the target remote station, and the transmission mode is always point-to-point transmission. The goal of this system is to design an efficient point-to-point message transmission method for satellite networks. The system structure diagram is as follows figure 1 shown.
[0018] The short message service program, hereinafter referred to as SMS, is responsible for processing the logic of sending and receiving short messages and maximizing the use of satellite channels.
[0019] SMS provides a REST API externally, and clients such as mobile apps or browsers can exchange short message data with SMS through the HTTP protocol. Short messages can be text, pictures, voice or video ...
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The invention discloses a satellite-oriented emergency communication system and a high-speed short message transmission method thereof. A remote station firstly sends a message to a central station, then the central station forwards the message to a target remote station, and the transmission mode is point-to-point transmission. A short message service program (SMS) interacts short message data with a client through the HTTP (Hypertext Transfer Protocol); the SMS is connected with a micro control unit (MCU) through the TCP (Transmission Control Protocol), when the client sends a message to theSMS through an HTTP interface, the SMS divides the message into multiple fragments and sends the fragmented message to the MCU; and the MCU sends the fragment data required to be sent to a radio frequency board (RF), the RF sends the received data fragments to the MCU at the same time, and then the MCU sends the data to the SMS. By using the scheme of the invention, the transmission efficiency ofthe satellite-oriented emergency communication system can be improved, and the transmission reliability is ensured.
Description
technical field [0001] The invention belongs to the field of satellite emergency communication, in particular to a satellite-oriented emergency communication system and a high-speed short message transmission method thereof. Background technique [0002] The satellite emergency communication system is a star-shaped VSAT system in the KU frequency band, which is composed of a central station and a remote station, and is used to solve communication problems in emergencies. The satellite network covers a wide area, but the transmission delay is large. Network latency is the time it takes for a packet of data to be sent from one computer to another computer on the network and back from that computer. When using satellite network transmission, it takes about 0.27 seconds for radio waves to be transmitted from the ground to an altitude of 36,000 kilometers. If two locations on the ground use satellite communications, it takes at least 0.54 seconds for data packets to go back and ...
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IPC IPC(8): H04W4/14H04B7/185
CPCH04B7/18513H04B7/18519H04W4/14
Inventor 何瑞石锋汤善东裴道鹰沈金海刘捷曾晓光郑成辉赖海光魏武
Owner 南京控维通信科技有限公司