Analysis of Design Parameters in Flexible Reuse Deployments of OFDMA Downlink Cellular Networks

Increasing the capacity of wireless cellular networkshas always been an important objective. To achieve high capacity,full frequency reuse is considered in 5G systems by the researchcommunity. However, the efficient Inter Cell Interference (ICI)mitigation methods are required since full reuse deployment leadsto the problem of ICI in cellular networks. To improve the userperformance, a flexible Fractional Frequency Reuse (FFR) hasbeen emerged as a solution in recent times by overcoming theICI. However, FFR has three important design parameters, suchas Signal to Interference plus Noise Ratio (SINR) threshold,bandwidth ratio and power ratio. The optimal choice andconfiguration of the design parameters is very important astheir configuration determines network performance. Hence,it appears highly desirable to investigate the impact of theparameters on the system performance. This paper investigatesthe impact of the design parameters on the deployment of flexiblereuse and suggests the optimal range of parameters where thecapacity of flexible reuse is increased significantly when comparedagainst full reuse