  Unmanned aerial vehicles (UAVs) are expected to play an important role in
next generation cellular networks, acting as flying infrastructure which can
serve ground users when regular infrastructure is overloaded or unavailable. As
these devices are expected to operate wirelessly they will rely on an internal
battery for their power supply, which will limit the amount of time they can
operate over an area of interest before having to recharge. In this article, we
outline three battery charging options that may be considered by a network
operator and use simulations to demonstrate the performance impact of
incorporating those options into a cellular network where UAV infrastructure
provides wireless service.
