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Aerial Reconfigurable Intelligent Surface-Assisted Integrated Access and Backhaul Networks
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- Authors
- Chanwon Park, Jemin Lee, Mi-young Yun, Junhwan Lee
- Issue Date
- 2025-08
- Citation
- IEEE Wireless Communications Letters, v.14, no.8, pp.2386-2390
- ISSN
- 2162-2337
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- In this paper, we develop the joint user association and the power allocation scheme for aerial reconfigurable intelligent surface (RIS)-assisted integrated access and backhaul (IAB) networks. In this networks, the terrestrial base station (BS)(t-BS) provides both the wireless backhaul link for unmanned aerial vehicle (UAV)-BS (U-BS) and wireless access links foraerial users using the aerial RIS. An aerial user can be served by a t-BS or an U-BS. We formulate the problem to maximizethe sum rate of aerial users by optimizing the user association and transmit power allocation of t-BS. Since the problem is a mixed-integer problem, we decompose it into two subproblems. After obtaining optimal solutions of subproblems, we propose an iterative algorithm to obtain the optimal association and power allocation of t-BS. Finally, through numerical results, we verify that the our proposed algorithm achieves higher sum rate of aerial users than a baseline scheme. We also investigate the impact of network parameters such as locations of U-BS and RIS on the sum rate and the RIS configuration.