Optimal Configuration of Fractional Frequency Reuse System for LTE Cellular Networks

In interference-limited OFDMA systems, fractional frequency reuse (FFR) algorithms can be used to combine the superior performance offerings of a universal reuse plan near cell center and a higher reuse plan near cell edge. A proper configuration of FFR requires knowledge of throughput statistics at all locations in the cell coverage area. This paper introduces an analytical optimization technique to configure a FFR solution for the downlink of LTE cellular system based on a throughput model developed herein. The optimal configuration is based on maximizing the average sector throughput subject to a minimum cell-edge performance and other performance constraints related to the standard reuse plans.