Cargando…

Analytical Study on Multi-Tier 5G Heterogeneous Small Cell Networks: Coverage Performance and Energy Efficiency

In this paper, we investigate the coverage performance and energy efficiency of multi-tier heterogeneous cellular networks (HetNets) which are composed of macrocells and different types of small cells, i.e., picocells and femtocells. By virtue of stochastic geometry tools, we model the multi-tier He...

Descripción completa

Detalles Bibliográficos
Autores principales: Xiao, Zhu, Liu, Hongjing, Havyarimana, Vincent, Li, Tong, Wang, Dong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5134513/
https://www.ncbi.nlm.nih.gov/pubmed/27827917
http://dx.doi.org/10.3390/s16111854
_version_ 1782471469706510336
author Xiao, Zhu
Liu, Hongjing
Havyarimana, Vincent
Li, Tong
Wang, Dong
author_facet Xiao, Zhu
Liu, Hongjing
Havyarimana, Vincent
Li, Tong
Wang, Dong
author_sort Xiao, Zhu
collection PubMed
description In this paper, we investigate the coverage performance and energy efficiency of multi-tier heterogeneous cellular networks (HetNets) which are composed of macrocells and different types of small cells, i.e., picocells and femtocells. By virtue of stochastic geometry tools, we model the multi-tier HetNets based on a Poisson point process (PPP) and analyze the Signal to Interference Ratio (SIR) via studying the cumulative interference from pico-tier and femto-tier. We then derive the analytical expressions of coverage probabilities in order to evaluate coverage performance in different tiers and investigate how it varies with the small cells’ deployment density. By taking the fairness and user experience into consideration, we propose a disjoint channel allocation scheme and derive the system channel throughput for various tiers. Further, we formulate the energy efficiency optimization problem for multi-tier HetNets in terms of throughput performance and resource allocation fairness. To solve this problem, we devise a linear programming based approach to obtain the available area of the feasible solutions. System-level simulations demonstrate that the small cells’ deployment density has a significant effect on the coverage performance and energy efficiency. Simulation results also reveal that there exits an optimal small cell base station (SBS) density ratio between pico-tier and femto-tier which can be applied to maximize the energy efficiency and at the same time enhance the system performance. Our findings provide guidance for the design of multi-tier HetNets for improving the coverage performance as well as the energy efficiency.
format Online
Article
Text
id pubmed-5134513
institution National Center for Biotechnology Information
language English
publishDate 2016
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-51345132017-01-03 Analytical Study on Multi-Tier 5G Heterogeneous Small Cell Networks: Coverage Performance and Energy Efficiency Xiao, Zhu Liu, Hongjing Havyarimana, Vincent Li, Tong Wang, Dong Sensors (Basel) Article In this paper, we investigate the coverage performance and energy efficiency of multi-tier heterogeneous cellular networks (HetNets) which are composed of macrocells and different types of small cells, i.e., picocells and femtocells. By virtue of stochastic geometry tools, we model the multi-tier HetNets based on a Poisson point process (PPP) and analyze the Signal to Interference Ratio (SIR) via studying the cumulative interference from pico-tier and femto-tier. We then derive the analytical expressions of coverage probabilities in order to evaluate coverage performance in different tiers and investigate how it varies with the small cells’ deployment density. By taking the fairness and user experience into consideration, we propose a disjoint channel allocation scheme and derive the system channel throughput for various tiers. Further, we formulate the energy efficiency optimization problem for multi-tier HetNets in terms of throughput performance and resource allocation fairness. To solve this problem, we devise a linear programming based approach to obtain the available area of the feasible solutions. System-level simulations demonstrate that the small cells’ deployment density has a significant effect on the coverage performance and energy efficiency. Simulation results also reveal that there exits an optimal small cell base station (SBS) density ratio between pico-tier and femto-tier which can be applied to maximize the energy efficiency and at the same time enhance the system performance. Our findings provide guidance for the design of multi-tier HetNets for improving the coverage performance as well as the energy efficiency. MDPI 2016-11-04 /pmc/articles/PMC5134513/ /pubmed/27827917 http://dx.doi.org/10.3390/s16111854 Text en © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xiao, Zhu
Liu, Hongjing
Havyarimana, Vincent
Li, Tong
Wang, Dong
Analytical Study on Multi-Tier 5G Heterogeneous Small Cell Networks: Coverage Performance and Energy Efficiency
title Analytical Study on Multi-Tier 5G Heterogeneous Small Cell Networks: Coverage Performance and Energy Efficiency
title_full Analytical Study on Multi-Tier 5G Heterogeneous Small Cell Networks: Coverage Performance and Energy Efficiency
title_fullStr Analytical Study on Multi-Tier 5G Heterogeneous Small Cell Networks: Coverage Performance and Energy Efficiency
title_full_unstemmed Analytical Study on Multi-Tier 5G Heterogeneous Small Cell Networks: Coverage Performance and Energy Efficiency
title_short Analytical Study on Multi-Tier 5G Heterogeneous Small Cell Networks: Coverage Performance and Energy Efficiency
title_sort analytical study on multi-tier 5g heterogeneous small cell networks: coverage performance and energy efficiency
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5134513/
https://www.ncbi.nlm.nih.gov/pubmed/27827917
http://dx.doi.org/10.3390/s16111854
work_keys_str_mv AT xiaozhu analyticalstudyonmultitier5gheterogeneoussmallcellnetworkscoverageperformanceandenergyefficiency
AT liuhongjing analyticalstudyonmultitier5gheterogeneoussmallcellnetworkscoverageperformanceandenergyefficiency
AT havyarimanavincent analyticalstudyonmultitier5gheterogeneoussmallcellnetworkscoverageperformanceandenergyefficiency
AT litong analyticalstudyonmultitier5gheterogeneoussmallcellnetworkscoverageperformanceandenergyefficiency
AT wangdong analyticalstudyonmultitier5gheterogeneoussmallcellnetworkscoverageperformanceandenergyefficiency