Performance of fractional frequency reuse with comp at the cell-edge

Fractional Frequency Reuse (FFR) is a simple and efficient method to suppress inter-cell interference (ICI) in multi-cell OFDMA networks. Base station cooperation, or a coordinated multipoint (CoMP) multiple access strategy in the FFR cell-edge, will further improve the performance of the systems. This paper presents analytical performance analysis for the downlink FFR scheme in a cluster of three or seven cells with CoMP over generalized composite fading consisting of Nakagami-m fading, path-loss and log-normal shadowing. Our analysis include the effect of full and partial loading of inter-group interference (IGI) on the capacity of the cellular system. We demonstrate that by reducing the number of participating CoMP base stations in cooperating cluster, the IGI is reduced, maximizing the capacity of the system. Our framework able to compute the spectral efficiency via a single numerical integral and is applicable to arbitrary fading distribution. Numerical and simulation results are provided.