Resource Allocation In Droneassisted Emergency Communication Systems

It is crucial for emergency communication networks to properly manage and coordinate between rescuers and disaster-affected users. Low-cost and high-mobility drones become important contributors to build up such kind of emergency communication networks. In this paper, we consider the drone as a deployed base station to provide communication for ground users in the post-disaster area. Considering the importance of providing guaranteed service for rescuers (compared to normal users), we have investigated power and subcarrier allocation to maximize the downlink system capacity in the drone-assisted emergency communication system. Due to the complexity of the formulated problem. a suboptimal solution is proposed by dividing users into two priority groups: high-priority users (rescuers) and low-priority users (affected people). According to analyses, the complexity of the proposed scheme is much lower than the optimal scheme. Simulation results have shown that when the transmit power of the drone is not very high, the performance of the proposed resource allocation scheme is very close to the optimal scheme.