Femtocell Cluster-Based Mobility-Aware Resource Allocation Scheme for OFDMA Network

Abstract

The introduction of third generation (3G) technology has been the driver behind customers’ demand for more and more data while extracting high quality services. Therefore, operators make use of femtocells to enhance indoor coverage and network capacity. However, a successful deployment of this type of network has been a challenge due to user mobility dynamics. This paper focuses on femtocell network with special attention to impact of user mobility dynamics on resource allocation. Specifically, users’ mobility dynamics in terms of connections, considering the variation in time of their position. Mobility-aware Femtocell Cluster-based Resource Allocation (M-FCRA) algorithm is analysed. It is a hybrid of centralized/distributed algorithm involving three main phases: cluster formation, cluster-head resource allocation with user mobility
awareness, and resource contention resolution. M-FCRA formulates the frequency/time resources allocation mathematically as a Min-Max
optimization problem. The results show that M-FCRA outperforms FCRA algorithm at low Signal to Interference and Noise Ratio (SINR) in terms of throughput satisfaction rate and spectrum spatial reuse. It has some limitations at high SINR due to handover procedures.