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Enabling high data-rate uplink cellular connectivity for drones is achallenging problem, since a flying drone has a higher likelihood of havingline-of-sight propagation to base stations that terrestrial UEs normally do nothave line-of-sight to. This may result in uplink inter-cell interference anduplink performance degradation for the neighboring ground UEs when dronestransmit at high data-rates (e.g., video streaming). We address this problemfrom a cellular operator's standpoint to support drone-sourced video streamingof a point of interest. We propose a low-complexity, closed-loop control systemfor Open-RAN architectures that jointly optimizes the drone's location in spaceand its transmission directionality to support video streaming and minimize itsuplink interference impact on the network. We prototype and experimentallyevaluate the proposed control system on a dedicated outdoor multi-cell RANtestbed, which is the first measurement campaign of its kind. Furthermore, weperform a large-scale simulation assessment of the proposed control systemusing the actual cell deployment topologies and cell load profiles of a majorUS cellular carrier. The proposed Open-RAN control scheme achieves an average19% network capacity gain over traditional BS-constrained control solutions andsatisfies the application data-rate requirements of the drone (e.g., to streaman HD video).

Streaming from the Air: Enabling Drone-sourced Video Streaming Applications on 5G Open-RAN Architectures