RIS-Empowered Satellite-Aerial-Terrestrial Networks With PD-NOMA

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https://ieeexplore.ieee.org/document/10508590

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https://doi.org/10.1109/COMST.2024.3393612
 http://hdl.handle.net/11603/33951

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UMBC Faculty Collection
UMBC Information Systems Department

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https://orcid.org/0000-0003-2631-9223

Date

2024-04-25

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journal articles
postprints
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Citation of Original Publication

Liu, Rui, Kefeng Guo, Xingwang Li, Kapal Dev, Sunder Ali Khowaja, Theodoros A. Tsiftsis, and Houbing Song. “RIS-Empowered Satellite-Aerial-Terrestrial Networks With PD-NOMA.” IEEE Communications Surveys & Tutorials, 2024, 1–1. https://doi.org/10.1109/COMST.2024.3393612.

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Subjects

Backscatter
Fading channels
NOMA
Reconfigurable intelligent surfaces
Resource management
Surveys
Wireless communication

Abstract

Satellite-aerial-terrestrial network (SATN) is considered as a promising architecture for sixth-generation (6G) wireless communication networks to achieve seamless coverage, flexible wireless access, and high data rate. Moreover, non-orthogonal multiple access (NOMA), and reconfigurable intelligent surface (RIS) can significantly increase spectrum and energy efficiency. Recently, the integration of these two technologies and SATN has attracted a lot of attention both in academia and industry. This survey provides a comprehensive overview of RIS-empowered SATN with NOMA. In particular, the rudimentary knowledge of SATN, NOMA scheme, and RIS technology is presented. Then, the motivations for investigating the NOMA-RIS-assisted SATN are discussed. In addition, we introduce the three usage modes of RIS, two scenarios of NOMA-RIS, and the path loss model of NOMA-RIS-assisted SATN. Next, the system performance is analyzed for a case study. Besides, a comprehensive overview of resource allocation in NOMA-RIS-assisted SATN is provided, where theoretical and artificial intelligence-based methods are compared and analyzed. Moreover, physical layer security and covert communication are selected as two representative security techniques to be discussed in NOMA-RIS-aided SATN. Furthermore, the combination of other emerging technologies with NOMA-RIS-assisted SATN is investigated. Finally, this survey provides a detailed discussion of the main challenges and open issues that need to be deeply investigated from a practical point of view, including channel modeling, channel estimation, deployment strategies, and backhaul control.