User switching method in satellite communication

A satellite communication and satellite technology, applied in the field of satellite communication, can solve problems such as difficult satellite selection, lack of perfect switching area setting and algorithm combination, poor communication quality, etc., to ensure communication quality, avoid frequent ping-pong switching, flexible and reliable strategy Effect

Active Publication Date: 2019-12-13
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0005] (3) The density of satellites gradually increases from the equator to the two poles, and the coverage overlap becomes more and more serious, which makes it difficult for user terminals to select satellites when switching, and "ping-pong" switching is prone to occur
[0014] Among the above-mentioned current switching strategies, the strategy based on the maximum communication angle has the disadvantage of frequent switching in high-latitude regions, and the strategy based on the longest service time and the most available channels has t

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  • User switching method in satellite communication
  • User switching method in satellite communication
  • User switching method in satellite communication

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[0045] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail through specific embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0046] First introduce the relevant background of the present invention.

[0047] Such as figure 1 As shown, the satellite communication system includes a ground network management center (NMC), a gateway, several satellites, and several user terminals. When the inventor was conducting research on the low-orbit satellite communication system, it was discovered that satellites operate at a high speed of 7km / s over the earth, and each satellite takes less than ten minutes to reach the top of the ground user terminal, and the access time is about 1-8. Minutes, if there is no better han...

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Abstract

According to the user switching method in satellite communication, a to-be-switched area relative to a user terminal is set for the edge of a coverage area of each satellite through a ground network management center; and then satellite switching is performed on the user terminal in the to-be-switched area of the satellite, so that the user terminal is connected to other satellites which are within the visual range of the user terminal and are not in the range relative to the to-be-switched area of the user terminal. The method has the advantages that the flexible to-be-switched area is set inthe satellite coverage area, the satellite switching of the user terminal is realized by adopting the user terminal judgment scheme, the strategy is flexible and reliable, the engineering realizationis simple, and the problem of frequent ping-pong switching is well avoided while the user communication quality is ensured.

Description

technical field [0001] The invention relates to the field of satellite communication, in particular to user switching management in satellite communication, and more specifically, to a user switching method based on an area to be switched in satellite communication. Background technique [0002] In satellite communications, especially low-orbit satellites, in order to avoid the high dynamic characteristics of satellites affecting the communication service quality of user terminals, user terminals need to perform frequent switching. Generally speaking, there are the following aspects: [0003] (1) The coverage time of a satellite to the user terminal on the ground is very short, and the signal strength at the edge of the satellite coverage area is relatively weak. In order not to affect the communication service quality of the user terminal, the user terminal needs to switch to other satellites; [0004] (2) The problem of load imbalance caused by uneven distribution of users...

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Application Information

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IPC IPC(8): H04B7/185
CPCH04B7/18519
Inventor 苏泳涛刘垚圻王晓鹏李瑞华张锐税敏张英英胡金龙石晶林
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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