Delay-Oriented Spectrum Sharing and Traffic Offloading in Coexisting UAV-Enabled Cellular and WiFi Networks

摘要

This paper studies an unmanned aerial vehicle (UAV)-enabled cellular system coexisting with WiFi network. By spectrum sharing and traffic offloading with the WiFi access point, our objective is to minimize the average delay of the users served by the UAV base station, while ensuring that the delay of the WiFi users is not greater than certain threshold, via jointly optimizing the spectrum allocation, the set of offloaded users and their offloaded traffic rates. The optimization problem is non-convex and difficult to be directly solved. We propose efficient sub-optimal solution via block coordinate descent method. Numerical results are provided to validate the proposed design.