Providing wireless coverage

Drones can be used to provide wireless coverage during emergency cases where each drone serves as an aerial wireless base station when the cellular network goes down. They can also be used to supplement the ground base station in order to provide better coverage and higher data rates for users . In this section, we present the aerial wireless base stations use cases, drone links and drone channel characteristics. We also show the path loss models for drones, classify them based on environment, altitude and telecommunication link, and present some challenges facing these path loss models. Moreover, we present drone deployment strategies that optimize several objective functions of interest. Then, we discuss the challenges facing drone interference mitigation techniques. Finally, we present the research trends and future insights for aerial wireless base stations.