Beam Coverage Comparison of LEO Satellite Systems Based on User Diversification

Shiyi Xia,Guotong Li,Quanjiang Jiang,Cheng Zou

doi:10.1109/access.2019.2959824

Abstract

To achieve global network coverage and the need for high-speed communication, the idea of providing Internet access from space has made a strong comeback in recent years. The low earth orbit (LEO) communication satellite constellation is once again on the stage of the world with its unique features and new technology. In order to provide faster and more affordable communication resources, low-orbit satellites need be customized to design satellites. The beam coverage design is essential to the user-customized design. This paper combines the user traffic demand model and the low-orbit satellite beam coverage model to analyze the impact of beam coverage characteristics on the performance of low-orbit satellite systems. The user traffic model bases on the user simulative distribution (uniform, normal) and the user geographic distribution (according to the AIS and ADS-B historical data acquired by STU-2B and STU-2C which are the LEO satellites launched in Sep, 2015, Jiuquan, China). The beam coverage model compares the OneWeb system to the SpaceX system. The beam coverage model takes the variability in performance induced by atmospheric conditions for the user links into account. Follow that this paper proposes a system method to simulate the two satellite system which described by the throughput, delay, access probability. Finally, the sensitivity of beam coverage to user diversification is summarized and discussed.

Highlights

IntroductionA. MOTIVATION According to the GSMA The State of Mobile Internet Connectivity 2019 report, there are 40% of the Earth’s regions without network coverage
Its advantages are space-based and global flawless coverage. It has obvious power constraint defects. It means that using resources more flexible is indispensable in Low-Earth orbit (LEO) satellite design
This paper aims to verify the impact of beam coverage on the performance of LEO satellite systems

Summary

Introduction

A. MOTIVATION According to the GSMA The State of Mobile Internet Connectivity 2019 report, there are 40% of the Earth’s regions without network coverage. Due to differences in coverage areas, there are still 4 billion people on the planet who are unable to access the Internet [1]. In order to achieve seamless coverage of the global network, satellite Internet is essential. Satellite communications are attractive to both developed and developing countries because of their comprehensive coverage and large capacity. Low-Earth orbit (LEO) satellite networks is capable of achieving ubiquitous wireless coverage, and facilitating access to information in areas where terrestrial networks are difficult to deploy or cost-prohibitive. LEO satellites have a significant advantage over GEO satellites in terms of end-to-end delay

Objectives

Methods

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Conclusion