Abstract
Intercell Interference (ICI) is one of the major factors that limit the performance and Quality of Service (QoS) of 4G wireless networks (Long Term Evolution/LTE-Advanced). For this reason, heterogeneous networks present an attractive solution for the improvement of mobile network’s services to provide better data rates and coverage. So, a key scheme in 4G traffic processing is the interference mitigation techniques. In the present work, we propose a model while optimizing the simulation parameters of three well-known ICI mitigation algorithms, namely Soft Frequency Reuse (SFR), Distributed Fractional Frequency Reuse (DFFR) and Strict Frequency Reuse (Strict FR). Here, mobile users are considered to be moving at high speed (300 Km/h: speed allowed by the LTE/LTE-A standards). We provide a simulation framework that is suitable for the parameters of the 4G system in terms of cells number and inter-eNodeB distance for an LTE/LTE-A network deployed in an urban area. Subsequently, we compare our proposed model with the aforementioned algorithms in terms of throughput, Signal-to-Interference-plus-Noise-Ratio (SINR) and Spectral efficiency by using the NS3 open source simulator. Results prove the efficiency of the proposed model in condensed area of mobile users compared to previous works that evaluated and tested immobile scenarios.
Highlights
The third Generation Partnership Program (3GPP) members started a feasibility study on the enhancement of the Universal Terrestrial Radio Access (UTRA) in the aim of continuing the long time frame competitiveness of the 3G Universal Mobile Telecommunications System (UMTS) technology beyond High Speed Packet Access (HSPA) (Veeresh et al, 2018; Pomilio de Oliveira et al, 2018; Harwahyu et al, 2016)
Simulation parameters of the studied methods were optimized in order to have a model that is compliant with the parameters of LTE/LTE-A standards
The available spectrum is divided into two sub-bands: The first one is permanently used in cell-center zones, while the second sub-band is used according to frequency reuse-N model in the cell-edge zones (Manli et al, 2015; Giménez et al, 2015; Noor Shahida et al, 2015; Hung-Chin and Wei-Di, 2015; Slawomir, 2017; Sinh Cong et al, 2015; Asif et al, 2017; Christos et al, 2013)
Summary
The third Generation Partnership Program (3GPP) members started a feasibility study on the enhancement of the Universal Terrestrial Radio Access (UTRA) in the aim of continuing the long time frame competitiveness of the 3G Universal Mobile Telecommunications System (UMTS) technology beyond High Speed Packet Access (HSPA) (Veeresh et al, 2018; Pomilio de Oliveira et al, 2018; Harwahyu et al, 2016). In this context, the efficiency of 3G networks allow carriers to provide more data and voice services over a given bandwidth. To meet the traffic demand in a hot spot area with numerous users “such as stadiums, airports, office buildings...” a dense deployment and spectrum reuse are necessary to have a significant ICI (Manli et al, 2015) Against this background and in order to achieve high-data wireless transmissions, dense reuse of available frequency spectrum and heterogeneous deployment are envisaged for LTE/LTE-A systems.
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