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Unmanned aerial vehicles (UAVs) have become important in many applicationsincluding last-mile deliveries, surveillance and monitoring, and wirelessnetworks. This paper aims to design UAV trajectories that simultaneouslyperform multiple tasks. We aim to design UAV trajectories that minimize packagedelivery time, and at the same time provide uniform coverage over aneighborhood area which is needed for applications such as network coverage orsurveillance. We first consider multi-task UAVs for a simplified scenario wherethe neighborhood area is a circular region with the post office located at itscenter and the houses are assumed to be uniformly distributed on the circleboundary. We propose a trajectory process such that if according to which thedrones move, a uniform coverage can be achieved while the delivery efficiencyis still preserved. We then consider a more practical scenario in which thedelivery destinations are arbitrarily distributed in an arbitrarily-shapedregion. We also do not assume any restrictions on the package arrivals. We showthat simultaneous uniform coverage and efficient package delivery is possiblefor such realistic scenarios. This is shown using both rigorous analyses aswell as simulations.

Multi-Purpose Aerial Drones for Network Coverage and Package Delivery