Method for reliably transmitting Beidou short messages

Abstract

The invention provides a method for reliably transmitting Beidou short messages. The method is used for a terminal A to transmit short messages to a terminal B; a satellite is contained; the method comprises the following steps: when the Beidou short messages are transmitted, accessing to a Beidou RD control center as a transfer forwarding station; carrying out logic judgment and secondary processing to the short message data by the Beidou RD control center; and then transmitting the short messages, thus reliably transmitting the Beidou short messages. According to the method provided by the invention, the communication success rate of the Beidou short messages is improved; effective feedback mechanism, retransmission mechanism and short message obtaining mechanism are added; according to the method, the transmitted data can be effectively stored at the Beidou RD control center; the Beidou short messages are transmitted and received reliably through taking the Beidou RD control center as the transfer forwarding station; the transmission success rate of the Beidou short messages can be improved greatly; and therefore, the transmission validity, reliability and stability of the Beidou short messages are improved.

Description

technical field [0001] The invention relates to the fields of satellite navigation and communication, and more specifically, relates to a method for realizing reliable transmission of Beidou short messages. Background technique [0002] The Beidou satellite navigation system is a global satellite navigation system independently developed by my country. The whole system consists of three parts: sky satellites, ground control stations and user application terminals. The Beidou RD short message communication is a characteristic function of the Beidou satellite navigation system. The Beidou RD communication is jointly completed by the space satellite, the ground control main station, and the ground Beidou terminal. It is initiated by the ground terminal, controlled by the main station, and relayed by the space satellite. [0003] Among them, the Beidou terminal has functions such as positioning and short message data communication. At present, in the real scene, the Beidou ter...

AI Technical Summary

Problems solved by technology

At present, in the real scene, the Beidou terminal will be affected by various reasons when communicating, which greatly reduces the communication success rate. According to our company's statistics, when the Beidou terminal communicates with short messages, if the weather, obstacles, clutter and other interference are excluded, the sending and receiving The success rate is 93%. Under the combined influence of various environmental factors, the success rate will drop to 85%. In recent years, the number of Beidou RD users has increased greatly, and the phenomenon of avoiding sky satellite channel congestion often occurs. At this time The Beidou satellite will adopt the transmission suppression function to suppress the user from sending short messages. In this case, the success rate of the Beidou terminal sending drops to 50%. It can be seen that the communication success rate of the Beidou terminal in actual use is low, and the user experience is poor. ; There are two main factors that lead to the unreliable transmission of Beidou short messages:

[0004] 1. Due to various interference, suppression and other uncertain environmental factors, data loss during Beidou short message transmission

[0005] 2. Lack of information feedback suppression, so that the sender does not know whether the receiver has received a short message, and the receiver does not know whether the sender has sent a short message

[0009] 3. The satellite receives the short message from terminal A and has forwarded it to terminal B ( figure 1 ④), but due to the signal strength of terminal B or various interferences in the environment, terminal B cannot receive short messages

[0011] 1. When the user sends a short message to the other party, that is, when terminal A transmits the information to the satellite ( figure 1 ①), due to the strength of the signal or various interferences in the environment, the satellite did not receive the short message from terminal A, and the user did not know whether the satellite received it; or the satellite received the short message, but due to System suppression, the satellite does not forward short messages, and the user does not know whether the satellite has forwarded or not

[0012] 2. The satellite receives the short message from terminal A and forwards it to terminal B ( figure 1 ④), but due to the signal strength of terminal B or various interferences in the environment, terminal B cannot receive the short message, and the user of terminal A does not know whether terminal B has received the short message

[0013] 3. Terminal B has received the short message, but the user of terminal A does not know whether terminal B has received the short message

[0014] 4. The satellite receives the short message from terminal A and forwards it to terminal B ( figure 1 ④), but because terminal B is not turned on, terminal B may not receive short messages, and the user of terminal B does not know whether any user has sent a short message to

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