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A Modified Algorithm for Inter-Cell Interference Reduction in Cellular OFDMA Networks
Mohammad Reza Barjasteh*, Vahid Taba Taba Vakili**
*Department of Electrical Engineering, Tehran South Branch, Islamic Azad University, Iran Tehran
**Department of Electrical Engineering, Iran University of Science & Technology, Iran, Tehran
Abstract – In this paper, we present an analytical solution to carry out performance analysis of various frequency reuse schemes in an OFDMA based cellular network. We study the performance in downlink in terms of signal to interference (SIR) ratio and cellular capacity. Analytical models are proposed for integer frequency reuse (IFR), fractional frequency reuse (FFR) and two level power control (TLPC) schemes. These models are based on a fluid model originally proposed for CDMA networks. The modeling key of this approach is to consider the discrete base stations entities as a continuum. To validate our approach, Monte Carlo simulations are car- ried out. Results of validation study show that results obtained through our analytical method are in conformity with those obtained through simulations. However, compared to time consuming simulations, our model is very time efficient. We also present a comparison between above three frequency reuse scheme.