We propose data-recovery schemes to improve the uplink reliability of Internet of Things (IoT) networks in which a gateway mounted on an unmanned aerial vehicle (UAV) collects data from sensor nodes on the ground. The proposed techniques employ fountain coding and message replication to correct frame erasures on the sensor-to-UAV links. A salient feature of the proposed schemes is their adaptive selection of the redundancy amount depending on the contact times between a sensor and the UAV. We illustrate our design philosophy for the special case of a network in which wake-up radios (WuRs) are used for activating the sensors upon the UAV's arrival, and the sensor-to-UAV data transfer employs the Long Range (LoRa) communication technology with random access.

翻译：本文提出一种数据恢复方案，旨在提升物联网网络的上行链路可靠性。该网络通过搭载在无人机上的网关收集地面传感器节点的数据。所提技术采用喷泉码与消息复制机制，以校正传感器至无人机链路的帧擦除。方案的核心特征在于能够根据传感器与无人机的接触时间自适应选择冗余量。我们以特定网络场景为例阐述设计原理：该场景利用唤醒无线电在无人机抵达时激活传感器，并通过采用随机接入方式的远距离通信技术实现传感器至无人机的数据传输。