Modified Fractional Frequency Reuse Scheme for Non-orthogonal Multiple Access Networks

The node density and mobile data traffic demand are increased with the advent of the internet of things (IoT) and telecommunication operators that have started deploying 5G cellular networks in order to get over the restriction imposed by the existing 4G cellular network. Besides microcellular base stations, inexpensive and simple radio heads are installed on a vast scale to support femto-cellular structure. This massive deployment of femto-cellular access points requires frequency reuse in each cell to raise the concern of inter-cell interference (ICI). This paper presents the modified fractional frequency reuse (MFFR) scheme for non-orthogonal multiple access multi cellular networks to mitigate the ICI by creating various sectoral patterns inside each cell. The performance evaluation illustrates the proposed MFFR outperforms the state-of-the-art.