UAV aided communication technology holds tremendous potential to upgrade outdoor link throughput and provide on-demand wireless services. The flexible deployment characteristic makes UAV-aided networks competent at emergency situations, including natural disasters and sudden traffic hotspots. In this backdrop, UAVs are required to be densely deployed to accommodate the huge volume of data traffic, where interference amid the neighboring cells turns out to be extremely challenging. To break this stalemate, this article systematically investigates spectrum sharing technology for ultra-dense UAV-aided networks from the architecture level down to the physical layer. We shed light on design principles and key challenges in utilizing overlapped spectrum for interference-enabled concurrent transmissions. With these principles in mind, we introduce SpecShare, which utilizes coding redundancy at the PHY layer for UAV spectrum sharing. We explore the optimal UAV placement strategy in the network layer to fully unleash the potential of such spectrum sharing capacity. We discuss the feasibility of SpecShare, and demonstrate its effectiveness in terms of network throughput.

中文翻译：

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通过重叠频谱共享实现超密集无人机辅助网络：潜力和方法


无人机辅助通信技术在提升室外链路吞吐量和提供按需无线服务方面具有巨大潜力。灵活部署的特点使得无人机辅助网络能够胜任自然灾害、突发交通热点等紧急情况。在这种背景下，无人机需要密集部署以容纳大量的数据流量，而相邻小区之间的干扰变得极具挑战性。为了打破这一僵局，本文从架构层到物理层系统地研究了超密集无人机辅助网络的频谱共享技术。我们阐明了利用重叠频谱进行干扰并发传输的设计原则和主要挑战。考虑到这些原则，我们引入了 SpecShare，它利用 PHY 层的编码冗余来实现无人机频谱共享。我们探索网络层的最佳无人机放置策略，以充分释放这种频谱共享能力的潜力。我们讨论了 SpecShare 的可行性，并证明了其在网络吞吐量方面的有效性。