Enhancing throughput performance in LTE-Advanced Hetnets with buffered Fractional Frequency Reuse

Fractional Frequency Reuse (FFR) is considered an attractive inter-cell interference coordination (ICIC) technique for modern Heterogeneous Cellular Systems (Hetnets) due to its low complexity and minimal signaling overhead. This paper proposes an FFR scheme that further increases the resource allocation to macro users (MUEs) who are located farther away from the serving macro base station (MeNB). A newly introduced intermediary region allows frequency resources to be reused in the edge and new region intelligently and also protects boundary users from severe cross-tier interference, thereby improving the per-user SINR. Simulation results show the gains in MUE throughput and total network sum-rate are significantly higher in the proposed scheme compared to OSFFR, FFR6-3R, FFR3-3R, sectored FFR3, and the No-FFR case.

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