Resource Allocation in OFDMA Femtocell Based LTE and 5G Networks with QoS Guarantees

Abstract

Expanding network capacity and guaranteeing the Quality of Service (QoS) are significant goals in fifth-Generation (5G) for high densities of mobile terminals. Femtocell-based 5G is an essential radio access technology that meets the exponentially increasing demand. Femtocells have emerged as an efficient solution for improving the capacity and coverage of wireless cellular networks, especially, for indoor wireless users. However because of the limited wireless radio resources, resource allocation is a key issue in femtocell networks. Motivated by this challenge in this study, we propose an efficient resource allocation approach that satisfies the QoS requirements for High-Priority (HP) users while serving Best-Effort (BE) users effectively as possible. The user differentiation strategy ensures the QoS guarantee uponthe priority level of each user. We consider major metrics for performance evaluation which are: the rate of rejected users, throughput satisfaction rate, spectrum spatial reuse and fairness. Dedicated simulations prove that our proposal outperforms one of the most effective techniques in the literature.

A Review of Inter Cell Interference Management in Regular and Irregular Geometry Cellular Networks

“…ICI has always been an issue with the cellular systems which evolves due to the dense reuse of radio resources and co-channel deployment. Therefore, the exploration of the ICI mitigation schemes has gained considerable attention to realize the dense spectrum reuse in the next-generation cellular standards [20]. Generally, the ICI mitigation schemes can be classed into three main groups, which are interference avoidance, interference cancellation, and interference randomization as shown in Figure 3.…”

Heterogeneous networks: Fair power allocation in LTE-A uplink scenarios

“…In some studies [32][33][34][35][36], the decentralized power allocation schemes were proposed under the assumption of limited eNobeB user channel information. In the neighbor-friendly scheme of Kim, Je [33], HeNobeBs allocated the total adjusted power on sub-channels in order to maintain the targeted Femtocell User Equipment (FUEs) sum-rates while mitigating the interference on Macrocell User Equipment (MUEs).…”