Unmanned Aerial Vehicles (UAVs) hold great potential to support a wide range of applications due to the high maneuverability and flexibility. Compared with single UAV, UAV swarm carries out tasks efficiently in harsh environment, where the network resilience is of vital importance to UAV swarm. The network topology has a fundamental impact on the resilience of UAV network. It is discovered that scale-free network topology, as a topology that exists widely in nature, has the ability to enhance the network resilience. Besides, increasing network throughput can enhance the efficiency of information interaction, improving the network resilience. Facing these facts, this paper studies the throughput of UAV Network with scale-free topology. Introducing the hybrid network structure combining both ad hoc transmission mode and cellular transmission mode into UAV Network, the throughput of UAV Network is improved compared with that of pure ad hoc UAV network. Furthermore, this work also investigates the optimal setting of the hop threshold for the selection of ad hoc or cellular transmission mode. It is discovered that the optimal hop threshold is related with the number of UAVs and the parameters of scale-free topology. This paper may motivate the application of hybrid network structure into UAV Network.

翻译：无人机凭借其高机动性和灵活性，在支撑多样化应用方面展现出巨大潜力。相较于单架无人机，无人机集群能在恶劣环境下高效执行任务，此时网络韧性对无人机集群至关重要。网络拓扑对无人机网络的韧性具有根本性影响。研究发现，作为自然界广泛存在的拓扑形式，标度自由网络拓扑能够增强网络韧性。此外，提升网络吞吐量可增强信息交互效率，进而改善网络韧性。基于此，本文研究了具有标度自由拓扑的无人机网络吞吐量。通过将自组织传输模式与蜂窝传输模式相结合的混合网络结构引入无人机网络，相较于纯自组织无人机网络，其吞吐量得到提升。进一步地，本文还探究了自组织与蜂窝传输模式选择中跳数阈值的最优设定，发现最优跳数与无人机数量及标度自由拓扑参数相关。本研究可激励混合网络结构在无人机网络中的应用。