Flexible Soft Frequency Reuse for Interference Management in the Networks with Flying Base Stations

The low cost, fast deployment, and flexible network topology of mobile networks with flying base stations (FlyBSs) make the FlyBSs a promising solution for ubiquitous communications in next generation mobile networks. However, an agility of the FlyBSs intensifies interference, which results in a notable degradation in throughput of cell-edge users. In this paper, we introduce a flexible soft frequency reuse (F-SFR) that enables a self-organization of a common SFR. Thus, the proposed F-SFR can handle an unpredictable and a dynamic topology of the networks with FlyBSs. To this end, we propose a graph theory-based algorithm for allocation of resources, which is understood as a bandwidth allocation and a transmission power setting in the context of SFR. We show that the proposed F-SFR can achieve 16% to 26% improvement in the throughput of the cell-edge users and improves the satisfaction of the cell-edge users up to 25% compared to the state of the art SFR solutions. We also demonstrate that the proposed scheme ensures a higher fairness in throughput among the users.