Energy efficiency priority low earth orbit satellite Internet of Things access method

Abstract

The invention discloses an energy efficiency priority low earth orbit satellite internet of things access method, which is characterized in that a low earth orbit satellite adopts a multi-beam technology with multiple feed sources in each beam, and the access capacity of the satellite internet of things is enhanced. A satellite covers a plurality of areas, and users in each area share the same beam. A ground gateway station receives channel state information from users and then sends the channel state information to a satellite through a high-capacity feed loop, and the satellite carries out superposition coding on transmitted signals of each area according to the received channel state information and then broadcasts the signals subjected to superposition coding to each user through a beam forming network. And after receiving the signals, the users decode the user signals with relatively weak channel gains in the region, remove the user signals, and finally decode the own signals. The invention provides an effective wireless access method for realizing the energy efficiency priority low earth orbit satellite Internet of Things of global seamless connection.

Description

technical field [0001] The invention relates to the field of satellite communication, in particular to a low-orbit satellite Internet of Things access method with priority given to energy efficiency. Background technique [0002] With the application of the Internet of Things in various fields of the economy and society, in some fields of data collection such as large-scale, cross-regional, and harsh environments, due to space and environmental constraints, the terrestrial Internet of Things is helpless, and a mismatch between service capabilities and needs has emerged. The reason is mainly that for the Internet of Things that relies on wireless access, in addition to the Internet of Things terminals, there must also be a communication network composed of enough base stations. However, there are many restrictions on the deployment of base stations on the ground and the communication network connecting base stations: it is impossible to establish base stations in areas such a...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of limited coverage of the Internet of Things, fewer users that can be accommodated by satellite communications, and low energy efficiency in existing beam design schemes, and proposes a low-orbit satellite Internet of Things access method with priority in energy efficiency. And put forward an effective method for the design of the satellite launch beam and the distribution of power

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