Large-scale low-orbit satellite network topology optimization method based on communication performance constraint

Abstract

The invention discloses a large-scale low-orbit satellite network topology optimization method based on communication performance constraint. The method comprises the following steps: 1, representing a satellite communication system topology through a weighted undirected graph; step 2, satellite network topology design is carried out based on a repeatable unit (motif); 3, analyzing and evaluating the communication performance of the system according to the communication time delay, the capacity, the survivability and the reliability; 4, acquiring a satellite network topology optimization model based on the communication performance constraint on the basis of the step 3; and 5, screening an optimal satellite network topological structure according to the optimization model.

Description

Technical field [0001] The invention is a satellite communication field, which involves a large -scale low -orbit satellite network topology optimization method based on communication performance constraints. Background technique [0002] Compared with the traditional ground communication system, the satellite communication system has the advantages of wide coverage and non -affected by terrain factors, which can become an effective supplement to the ground communication system. With the rise of the microbesin network, the low -orbit satellite constellations are expected to provide low -delay and high -capacity communication services worldwide. Therefore, the low -orbit satellite communication system has become a hot spot for research and development. [0003] At present, the scale of low -orbit satellite constellations is expanding. For example, the STARLINK constellation of SpaceX is expected to reach tens of thousands of satellites in the constellation after the deployment is ...

AI Technical Summary

Problems solved by technology

This scheme improves the limitations of the grid model-based topology design method in terms of system transmission hop performance, but lacks consideration and analysis of other system performance

[0006] The main problems of the above technologies are as follows: when multiple ground terminals have communication needs at the same time, the reasonable allocation of link bandwidth resources is not realized through the topology structure design, and the system capacity is difficult to guarantee; The topology design minimizes the impact of faulty nodes on the communication quality of the system, and the invulnerability of the system is difficult to guarantee; when the satellites move, the distance and pitch angle between the satellites also change, and the stability of the corresponding inter-satellite link also changes. Its distance length and pitch angle change, and the existing topology design method does not fully consider the influence of the stability of the inter-satellite link on the reliability of the system transmission path

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