Maximization of Sum Throughput in LTE Heterogeneous Network using Region Splitting-Based Resource Partitioning Scheme

LTE Advanced (LTE-A) technology has been developed by the third generation partnership project in order to facilitate increase in mobile data traffic. In LTE-A network, an efficient resource partitioning scheme is needed to increase the system throughput through the mitigation of Inter Cell Interference (ICI). The objective of this research is to enhance the sum throughput of macrocell through an proposed Region splitting based Resource Partitioning scheme (RRP). In this scheme, the macrocell is partitioned into three regions, namely inner, centre and outer. In a cluster of three cells, the availble frequency spectrum is divided into four non-overlapping parts, out of which three parts of the spectrum are shared by outer and inner region. The remaining part is shared by the centre region. However, the overlaid femtocells partially shares the spectrum of macrocell. The performance of the proposed RRP scheme in terms of sum throughput, sub channel utilization and Jains Fairness index is analysed for both heuristic and optimal region radii approaches. The region radii that result in maximum and optimal sum throughput are analyzed by the proposed RRP scheme. Using Monte Carlo simulations, the radii of both inner and centre region are varied and the region radii that result in optimum sum throughput are configured as the optimal radius. The proposed scheme is compared with the traditional Soft Frequency Reuse scheme with respect to performance metrics. From the result, it is inferred that the sum throughput of macrocell achieves a maximum enhancement of 167.62 and 108.42 % by the proposed scheme of heuristic and optimal region radii approaches respectively.