Backhaul and delay-aware placement of UAV-enabled base station

Abstract

Unmanned aerial vehicle (UAV) enabled base station (BS) (UBS) is being envisioned to provide wireless access to the areas where cellular infrastructure is not deployed or network is down due to malfunction or natural disaster. In this paper, cellular broadband access through UBS with quality of service assurance in terms of delay is addressed. Here, channel model of backhaul along with fronthaul link is considered simultaneously. An optimization problem is formulated to obtain the optimal deployment altitude while satisfying the coverage and traffic load constraints. Backhaul and Delay aware Positioning of UBS (BaDPU) algorithm is proposed to determine the optimal deployment height. An analytical expression for probability of coverage is obtained for a given SNR threshold. Simulation results reveal that, the optimal deployment height changes significantly for different arrival rate and volume of data demand.