Self-adaption switching method for fast terminal in satellite network

Abstract

The invention discloses a self-adaption switching method for a fast terminal in a satellite network and belongs to the technical field of the satellite communication. The method comprises the steps of finding visible satellites, constructing a two-dimensional mobile model, calculating the remaining service time of the visible satellites one by one, selecting a visible satellite as a target satellite which has a vacant channel resource and has the longest remaining service time, and establishing a communication link with the new target satellite. The two-dimensional mobile model does not depend on users' historical movement data, and therefore a very large storage space is not needed; the newly provided two-dimensional mobile model is universal, not only is suitable for calculating the remaining service time of fast terminal users, but also can be used for analyzing the remaining service time of common low-speed users, and self-adaptation switching demands of two types of users are satisfied; besides, the self-adaptation switching strategy can not only be applied to a single-layered satellite network model, but also can be used for a double-layered satellite network model, and the movement scenes are more universal.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and in particular relates to an adaptive switching method for fast terminals in a satellite network. Background technique [0002] Today, with the diversified development of communication technology, satellite communication, as an important communication method, is playing an increasingly important role. Satellite network is widely used in the field of communication due to its global coverage, flexible networking, strong anti-interference and other advantages. LEO (Low Earth Oribit Satellite, low-orbit satellite) is becoming an important development direction of the future satellite mobile communication system due to its advantages of small delay and low power consumption. Most of the terminals in the current satellite communication system are slow terminals. However, with the development of science and technology, the strengthening of the trend of globalization and the needs of...

AI Technical Summary

Problems solved by technology

[0009] However, the mobility prediction models in the literature at this stage have (1) short-term (such as next cell) user mobility prediction; (2) restrictive assumptions (for example, the movement of users follows certain characteristics); (3) The answer depends entirely on the historical motion characteristics of individual users; (4) It requires a lot of storage space and high overhead.

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