An emergency communication system and method based on satellite communication

Abstract

The invention discloses an emergency communication system based on satellite communication and a method, which relates to the technical field of emergency communications. The system comprises a user end, a receiving end, a ground relay station, and a communication satellite. The ground relay station comprises a transmitting ground station and a receiving ground station, wherein the number of transmitting ground stations is at least two, and the user end is in communication connection with at least two transmitting ground stations. A communication link selection module and a detection module for detecting communication quality between at least two transmitting ground stations and the communication satellite are provided with the user end. The detection module respectively transmits a specific data signal representing each communication link to the target receiving ground station through at least two transmitting ground stations and the communication satellite, and then receives a feedback signal from the target receiving ground station, and determines the communication quality of each communication link according to the feedback signal. The link selection module is connected with the detection module, and selects one of the communication links to communicate according to the communication quality of each communication link, thereby ensuring normal communication and communicationquality.

Description

technical field [0001] The present invention relates to the technical field of emergency communication, more specifically, it relates to an emergency communication system and method based on satellite communication. Background technique [0002] The emergency communication system, as the name implies, is an auxiliary communication link device that is urgently built or activated when the normal communication line fails or the communication is not smooth. It uses different transmission paths to transfer the on-site signal and output it to the target port . [0003] The satellite communication system mainly includes a ground station and a satellite relay station. The signal is sent from the ground station to the satellite, and then sent to the target ground station after being relayed and amplified by the satellite, thereby completing the signal transmission. In practice, if scientific expedition personnel enter the forest or grassland hinterland, or the normal ground communic...

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Problems solved by technology

[0005] Aiming at the use of satellite communication as the backup link of the emergency communication system in practical application, since the communication link is single and fixed, there may be a problem of signal interruption due to geographical barriers during the transmission process. The first purpose of the present invention is to propose a In the emergency communication system of satellite communication, a connection is established between the user terminal and at least one ground station. -Select one of the ground stations with the best satellite communication quality to communicate with the satellite, which can effectively improve the reliability of satellite communication as an emergency communication method

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