FFR-aided OFDMA-based networks under spatially correlated shadowing
Jan García-Morales, Guillem Femenias, Felip Riera-Palou · 2017
One of the most important factors affecting the quality of service (QoS) in orthogonal frequency division multiple access (OFDMA) networks is the intercell interference (ICI). An efficient technique for mitigating ICI is the well-known fractional frequency reuse (FFR), wherein cells are partitioned into center and edge spatial regions and different frequency reuse factors are applied to both of them. This work presents an analytical characterization of FFR-aided OFDMA-based networks that, unlike most previous studies, incorporates shadowing effects. The FFR design parameters maximizing the overall cell spectral efficiency, are determined for both round robin (RR) and maximum signal to interference plus noise ratio (MSINR) scheduling policies. Simulation results serve to validate the accuracy of the introduced model while at the same time reveal which are the optimum FFR settings.