Spectrum Sharing and Interference Management for 6G LEO Satellite-Terrestrial Network Integration

IF 34.4 1区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS IEEE Communications Surveys and Tutorials Pub Date : 2024-11-27 DOI:10.1109/COMST.2024.3507019

Navid Heydarishahreza;Tao Han;Nirwan Ansari

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Abstract

The rapid emergence of satellite systems introduces unprecedented interference challenges to both existing satellite networks and Terrestrial Networks (TNs), necessitating innovative strategies to efficiently manage spectrum resources amid heightened competition. Traditional interference management methods fail to address the unique challenges facing satellite systems. These challenges include higher propagation delays caused by the high altitude of Low Earth Orbit (LEO) satellites, increased Doppler shifts due to their high speeds, atmospheric attenuations affecting LEO satellite-TN links, and limited processing capacity in satellite systems. This article provides a comprehensive exploration of interference in LEO satellite-Integrated Terrestrial Networks (LITNets), encompassing various types of interference, including Inter-Beam Interference (IBI), which occurs between different beams of the same satellites; Inter-Satellite Interference (ISI), which arises between different satellites; and LEO satellite-Terrestrial infrastructure Interference (LTI). Moreover, it outlines strategies for interference management and reviews current mitigation methods. Finally, the article concludes by discussing the research challenges and proposing future directions for enhancing spectrum efficiency and interference management in LITNets.

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6G低轨卫星-地面网络融合频谱共享与干扰管理

卫星系统的迅速出现给现有卫星网络和地面网络（TNs）带来了前所未有的干扰挑战，需要创新战略来有效管理竞争加剧的频谱资源。传统的干扰管理方法无法解决卫星系统面临的独特挑战。这些挑战包括低地球轨道（LEO）卫星的高海拔造成的更高的传播延迟，由于其高速而增加的多普勒频移，影响低地球轨道卫星- tn链路的大气衰减，以及卫星系统中有限的处理能力。本文全面探讨了低轨道卫星-综合地面网络（LITNets）中的干扰，包括各种类型的干扰，包括发生在同一颗卫星的不同波束之间的波束间干扰（IBI）；卫星间干扰，不同卫星之间产生的干扰；低轨卫星-地面基础设施干扰（LTI）。此外，它还概述了干扰管理战略，并审查了目前的缓解方法。最后，本文讨论了研究挑战，并提出了提高LITNets频谱效率和干扰管理的未来方向。

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来源期刊

IEEE Communications Surveys and Tutorials COMPUTER SCIENCE, INFORMATION SYSTEMS-TELECOMMUNICATIONS

CiteScore

80.20

自引率

2.50%

发文量

审稿时长

6 months

期刊介绍： IEEE Communications Surveys & Tutorials is an online journal published by the IEEE Communications Society for tutorials and surveys covering all aspects of the communications field. Telecommunications technology is progressing at a rapid pace, and the IEEE Communications Society is committed to providing researchers and other professionals the information and tools to stay abreast. IEEE Communications Surveys and Tutorials focuses on integrating and adding understanding to the existing literature on communications, putting results in context. Whether searching for in-depth information about a familiar area or an introduction into a new area, IEEE Communications Surveys & Tutorials aims to be the premier source of peer-reviewed, comprehensive tutorials and surveys, and pointers to further sources. IEEE Communications Surveys & Tutorials publishes only articles exclusively written for IEEE Communications Surveys & Tutorials and go through a rigorous review process before their publication in the quarterly issues. A tutorial article in the IEEE Communications Surveys & Tutorials should be designed to help the reader to become familiar with and learn something specific about a chosen topic. In contrast, the term survey, as applied here, is defined to mean a survey of the literature. A survey article in IEEE Communications Surveys & Tutorials should provide a comprehensive review of developments in a selected area, covering its development from its inception to its current state and beyond, and illustrating its development through liberal citations from the literature. Both tutorials and surveys should be tutorial in nature and should be written in a style comprehensible to readers outside the specialty of the article.