Supporting IoT With Rate-Splitting Multiple Access in Satellite and Aerial-Integrated Networks

By Zhi Lin, Min Lin, Tomaso de Cola, Jun-Bo Wang, Wei-Ping Zhu, Julian Cheng. IEEE Internet of Things Journal, 2021

510 citations recorded by the source corpus.

To satisfy the explosive access demands of Internet-of-Things (IoT) devices, various kinds of multiple access techniques have received much attention. In this article, we investigate the multicast communication of a satellite and aerial-integrated network (SAIN) with rate-splitting multiple access (RSMA), where both satellite and unmanned aerial vehicle (UAV) components are controlled by network management center and operate in the same frequency band. Considering a content delivery scenario, the UAV subnetwork adopts the RSMA to support massive access of IoT devices (IoTDs) and achieve desired performances of interference suppression, spectral efficiency, and hardware complexity. We first formulate an optimization problem to maximize the sum rate of the considered system subject to the signal-interference-plus-noise-ratio requirements of IoTDs and per-antenna power constraints at the UAV and satellite. To solve this nonconvex optimization problem, we exploit the sequential convex approximation and the first-order Taylor expansion to convert the original optimization problem into a solvable one with the rank-one constraint, and then propose an iterative penalty function-based algorithm to solve it. Finally, simulation results verify that the proposed method can effectively suppress the mutual interference and improve the system sum rate compared to the benchmark schemes.

Subfields: Aerospace Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/91576578d686eaab4946b1e3d2c36d388f3769a9

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Citations in the corpus

Rate-Splitting Multiple Access: Fundamentals, Survey, and Future Research Trends (2022, background): “The benefits of RSMA discovered for multigroup multicasting transmission in cellular networks have inspired the study of RSMA for multibeam satellite communications [59], [96], [128], [129], [140], [153], [185], [186].”
A Primer on Rate-Splitting Multiple Access: Tutorial, Myths, and Frequently Asked Questions (2022, background): “However, severe interference in and between the sub-networks is induced by an aggressive frequency reuse, which calls for the use of efficient multi-antenna [179] and multiple access strategies [180]–[182].”