By Fractional Frequency Reuse mitigate interference in heterogeneous femto and macro cell networks

For indoor coverage extension Long Term Evolution (LTE) has developed a Femtocell. However, in advance we should solve the interference problem between the femtocell and the macrocell. Here, we propose a scheme to interference mitigation in the LTE femtocell systems using Fractional Frequency Reuse (FFR). By the FFR under the macrocell allocating a frequency band, to avoid interference the femtocell select those sub-bands which are not used in the macrocell sub-area. Simulation results show that proposed scheme improves total/edge throughputs and reduces the outage probability in the overall network.