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arXiv · 2601.17751

Ampli-Flection for 6G: Active-RIS-Aided Aerial Backhaul with Full 3D Coverage

Hong-Bae Jeon·Chan-Byoung Chae
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Abstract

In this paper, we propose a novel aerial backhaul architecture that employs an aerial active reconfigurable intelligent surface (RIS) to achieve energy-efficient, {full 3D coverage including UAV-BSs and ground users in 6G wireless networks}. Unlike prior aerial-RIS approaches limited to {2D coverage with only servicing ground users} or passive operation, the proposed design integrates an active-RIS onto a high-altitude aerial platform, enabling reliable line-of-sight links and overcoming multiplicative fading through amplification. In a scenario with UAV-BSs deployed to handle sudden traffic surges in urban areas, the aerial-active-RIS both reflects and amplifies backhaul signals to overcome blockage. We jointly optimize the aerial platform placement, array partitioning, and RIS phase configuration to maximize UAV-BS energy-efficiency. Simulation results confirm that the proposed method significantly outperforms benchmarks, demonstrating its strong potential to deliver resilient backhaul connectivity with comprehensive 3D coverage in 6G networks.

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Hong-Bae Jeon, Chan-Byoung Chae. 2026-01-25. Ampli-Flection for 6G: Active-RIS-Aided Aerial Backhaul with Full 3D Coverage. https://arxiv.org/abs/2601.17751

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