An effective semi-static interference coordination scheme for wireless cellular systems

Abstract

In recent years, interference management designing has been studied widely for high data-rate wireless systems in next generation cellular systems such as 3GPP long term evolution (LTE), LTE-advanced, and worldwide interoperability for microwave access (WiMAX), where highly dense reuse of spectrum is required. Interference management includes receiver processing, interference randomization by frequency hopping, and interference coordination through resource usage restrictions imposed by frequency and power planning. In this paper, we present a novel semi-static interference coordination scheme for cellular systems to improve the cell-edge performance with little penalty to the overall system throughput. The proposed scheme consists of two stages, semi-static distributed resource pre-allocation and power control. Here, power control with a fixed adjusting factor and an adaptive power control algorithm are both considered. Simulation results show that the proposed scheme outperforms a number of reference conventional interference coordination schemes in terms of cell-edge and overall system throughput especially in high-load scenarios.