A novel metric to study the performance of sectorized fractional frequency reuse techniques in LTE

摘要

LTE Femtocells are designed to increase capacity and coverage especially for the indoor and cell-edge mobile users. Typically, they are deployed to offload the macrocell. However, due to co-location of femtocells in macrocell coverage, the co-tier and cross-tier interferences are high. Fractional Frequency Reuse mechanism (FFR) is one of the most effective femtocell interference avoidance techniques. In this paper, we propose a new metric to determine optimal inner region radius and frequency allocation which optimizes the total cell throughput and serves as many number of users in the network. We already know that FFR technique is designed to better serve cell edge users. With introduction of new metric, we extend that idea to serve as many users in the network. The new metric is applied to sectorized FFR configurations and their performance is evaluated under different network conditions.