Ensuring Reliable Connectivity to Cellular-Connected UAVs with Up-tilted Antennas and Interference Coordination
Md Moin Uddin Chowdhury, Ismail Guvenc, Walid Saad, and Arupjyoti, Bhuyan

TL;DR
This paper proposes a novel cellular architecture with up-tilted antennas and interference coordination to improve reliable connectivity for UAVs, addressing coverage and interference issues caused by traditional down-tilted antennas.
Contribution
It introduces a new UAV-supporting cellular architecture with up-tilted antennas, models ground reflection effects, and optimizes antenna tilt angles using a genetic algorithm for enhanced UAV connectivity.
Findings
Higher minimum SIRs for UAVs achieved
Effective interference mitigation with minimal impact on ground users
Proposed method outperforms baseline approaches in simulations
Abstract
To integrate unmanned aerial vehicles (UAVs) in future large-scale deployments, a new wireless communication paradigm, namely, the cellular-connected UAV has recently attracted interest. However, the line-of-sight dominant air-to-ground channels along with the antenna pattern of the cellular ground base stations (GBSs) introduce critical interference issues in cellular-connected UAV communications. In particular, the complex antenna pattern and the ground reflection (GR) from the down-tilted antennas create both coverage holes and patchy coverage for the UAVs in the sky, which leads to unreliable connectivity from the underlying cellular network. To overcome these challenges, in this paper, we propose a new cellular architecture that employs an extra set of co-channel antennas oriented towards the sky to support UAVs on top of the existing down-tilted antennas for ground user equipment…
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Taxonomy
TopicsUAV Applications and Optimization · Satellite Communication Systems · Antenna Design and Analysis
