tokens: Applications using unmanned aerial vehicles ( UAVs ) , such as drones , are also emerging and among them are drones for public safety , remote explorations , logistics , flying base stations , etc .. Owing to the high dynamics in such UAV environments , real - time video , audio , and haptic information should be exchanged within a low latency , i.e. , the allowed air latency less than or equal to one millisecond for kinesthetic information and a few milliseconds to tens of milliseconds for high - quality video / audio information and haptic information .