Satellite-ground transmission method under large-scale LEO satellite deployment

Abstract

The invention provides a satellite-ground transmission method under large-scale LEO satellite deployment. The method comprises an uncertain number of channel matching steps and a power optimization step based on Lagrange duality, and the uncertain number of channel matching steps are as follows after ground nodes are connected with satellites, channel resources in the satellites multiplexing the same frequency band segment are allocated, in the step of power optimization based on the Lagrange duality, a Lagrange duality method is used, and the uplink transmission rate is maximized by determining the uplink transmission power of different ground nodes through distribution. The method is advantaged in that the resource allocation method is mainly applied to satellite-ground transmission resource allocation in a low-orbit LEO satellite large-scale deployment scene, and channel and power resources in the whole system are allocated by applying the resource allocation method provided by theinvention, so uplink transmission performance of a satellite-ground network is greatly improved, and efficient transmission is realized.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a satellite-ground transmission method under the deployment of large-scale LEO satellites. Background technique [0002] In recent years, academia and industry have begun to focus on the research of Space-Sky-Terrestrial Integrated Information Network (SSTIIN). One of the key points of SSTIIN is to use a large number of LEO satellites for large-scale networking to realize Realize global networking and real-time access. Therefore, under large-scale LEO deployment, an efficient satellite-to-ground transmission method is crucial to play the role of LEO satellites. [0003] In the study of related issues under the large-scale deployment of LEO satellites, Sheng et al. studied the transformation and scheduling of multi-dimensional resources including transmission resources in the space information network. On this basis, He et al. studied the joint allocation of transmission ...

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Problems solved by technology

[0005] Defects in the background technology: In the existing background technology, there are still relatively few studies on the transmission resource allocation problem under the large-scale deployment of LEO. Due to the particularity of large-scale deployment scenarios and the existence of objective conditions such as co-channel interference between satellites, it is impossible to directly copy the model and method of the ground network to the LEO satellite, so special research is required for this situation

At the same time, in the existing research on resource allocation of LEO satellites, the main focus is on the joint scheduling and transformation of multi-dimensional resources. There are not many detailed studies on the allocation of LEO satellite transmission resources, and the allocation methods are still highly complex. problems such as speed and low availability

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