Space information network system based on low-earth-orbit satellite constellation

Abstract

The invention discloses a space information network system based on a low-earth-orbit satellite constellation. The space information network system comprises M low-earth-orbit satellite control nodes, N low-earth-orbit satellite transmission nodes, P common-orbit-plane inter-satellite links and Q different-orbit-plane inter-satellite links. The M low-earth-orbit satellite control nodes are distributed on M orbit planes and borne by satellites close to the equator and are responsible for collection of network views and making, calculation and issuing of space data forwarding rules. The N low-earth-orbit satellite transmission nodes are evenly distributed on the M orbit planes, the low-earth-orbit satellite transmission nodes in the same orbit plane are controlled by the low-earth-orbit satellite control nodes in the same orbit plane, and the N low-earth-orbit satellite transmission nodes exchange, distribute and transmit space data according to received distribution rules. The P common-orbit-plane inter-satellite links provide physical channels for data transmission between stars in the same orbit plane. The Q different-orbit-plane inter-satellite links provide physical channels for data transmission between stars in different orbit planes. Compared with a traditional space information network, the low-earth-orbit satellite network system has better survivability, shorter time delay, higher network efficiency and more flexible service adaptability.

Description

Technical field [0001] The invention relates to satellites and network systems in the field of aerospace technology, and in particular to a space information network system including a low-orbit satellite control node and a low-orbit satellite transmission node and a networking method thereof. Background technique [0002] The space information network system is a system built for the purpose of real-time acquisition, transmission, distribution and efficient application of various user spacecraft information in Skyrim. It is used by spacecraft as various network nodes, including comprehensive functions such as access, transmission, and control, and finally realizes end-to-end real-time transmission of space data. Spatial data includes load data, measurement and control data, data link data, and various instruction data. [0003] China currently has more than one hundred application satellites in orbit, but due to national territorial restrictions, most of the ground stations servi...

AI Technical Summary

Problems solved by technology

[0004] The existing spatial information network system and its networking methods are more common in the mixed networking mode of high, medium and low, including GEO / MEO, MEO / LEO double-layer satellite network, and GEO / MEO / LEO three-layer network. The network system and its networking method make full use of the characteristics of satellite spatial location distribution, and adopt an approximate tree-like network structure, which is easier to manage centrally, but the system has poor invulnerability. Once a high-level node fails, the network nodes in its coverage area will follow not working

In addition, the biggest disadvantage of the system is that the delay is too large, and any service will pass through a higher-level node, which means a longer distance transmission delay

The spatial information network system composed of GEO satellites, MEO satellites or LEO satellites has also been studied correspondingly, but its networking method also has problems such as poor invulnerability, long delay, or low transmission efficiency.

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