Cargando…

Bandwidth Cost Minimization via User Association for Enterprise WLANs

Enterprise Wireless LANs (E-WLANs) such as airport WiFi, have become a convenient way for Internet access for mobile users. In an E-WLAN, access points (APs) are usually deployed with high-density around the infrastructure to provide sufficient coverage and for a better service, where a mobile user...

Descripción completa

Detalles Bibliográficos
Autores principales: Wan, Xili, Guan, Xinjie, Zhao, Wentian, Bai, Guangwei, Choi, Baek-Young
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6308852/
https://www.ncbi.nlm.nih.gov/pubmed/30477145
http://dx.doi.org/10.3390/s18124104
_version_ 1783383286079291392
author Wan, Xili
Guan, Xinjie
Zhao, Wentian
Bai, Guangwei
Choi, Baek-Young
author_facet Wan, Xili
Guan, Xinjie
Zhao, Wentian
Bai, Guangwei
Choi, Baek-Young
author_sort Wan, Xili
collection PubMed
description Enterprise Wireless LANs (E-WLANs) such as airport WiFi, have become a convenient way for Internet access for mobile users. In an E-WLAN, access points (APs) are usually deployed with high-density around the infrastructure to provide sufficient coverage and for a better service, where a mobile user chooses one AP to associate with among multiple available APs in the vicinity. Many studies have been done on developing user association techniques to increase system performance, with various objectives including network throughput maximization, load balancing etc. Our work is unique in that we focused on bandwidth cost minimization via user association from the perspective of the E-WLAN operators. Specifically, by considering the bandwidth demands from mobile users, we modeled the joint user association and cost minimization problem in the heterogeneous E-WLAN with additional constraints from individual bandwidth demands as an optimization problem. To solve the optimization problem efficiently, we propose an approximation algorithm using relaxation and rounding techniques. We prove that the proposed algorithm has performance bound with a constant ratio to the optimization problem. Furthermore, our simulation results exhibit the superiority of our proposed algorithm over prior schemes.
format Online
Article
Text
id pubmed-6308852
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-63088522019-01-04 Bandwidth Cost Minimization via User Association for Enterprise WLANs Wan, Xili Guan, Xinjie Zhao, Wentian Bai, Guangwei Choi, Baek-Young Sensors (Basel) Article Enterprise Wireless LANs (E-WLANs) such as airport WiFi, have become a convenient way for Internet access for mobile users. In an E-WLAN, access points (APs) are usually deployed with high-density around the infrastructure to provide sufficient coverage and for a better service, where a mobile user chooses one AP to associate with among multiple available APs in the vicinity. Many studies have been done on developing user association techniques to increase system performance, with various objectives including network throughput maximization, load balancing etc. Our work is unique in that we focused on bandwidth cost minimization via user association from the perspective of the E-WLAN operators. Specifically, by considering the bandwidth demands from mobile users, we modeled the joint user association and cost minimization problem in the heterogeneous E-WLAN with additional constraints from individual bandwidth demands as an optimization problem. To solve the optimization problem efficiently, we propose an approximation algorithm using relaxation and rounding techniques. We prove that the proposed algorithm has performance bound with a constant ratio to the optimization problem. Furthermore, our simulation results exhibit the superiority of our proposed algorithm over prior schemes. MDPI 2018-11-23 /pmc/articles/PMC6308852/ /pubmed/30477145 http://dx.doi.org/10.3390/s18124104 Text en © 2018 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
Wan, Xili
Guan, Xinjie
Zhao, Wentian
Bai, Guangwei
Choi, Baek-Young
Bandwidth Cost Minimization via User Association for Enterprise WLANs
title Bandwidth Cost Minimization via User Association for Enterprise WLANs
title_full Bandwidth Cost Minimization via User Association for Enterprise WLANs
title_fullStr Bandwidth Cost Minimization via User Association for Enterprise WLANs
title_full_unstemmed Bandwidth Cost Minimization via User Association for Enterprise WLANs
title_short Bandwidth Cost Minimization via User Association for Enterprise WLANs
title_sort bandwidth cost minimization via user association for enterprise wlans
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6308852/
https://www.ncbi.nlm.nih.gov/pubmed/30477145
http://dx.doi.org/10.3390/s18124104
work_keys_str_mv AT wanxili bandwidthcostminimizationviauserassociationforenterprisewlans
AT guanxinjie bandwidthcostminimizationviauserassociationforenterprisewlans
AT zhaowentian bandwidthcostminimizationviauserassociationforenterprisewlans
AT baiguangwei bandwidthcostminimizationviauserassociationforenterprisewlans
AT choibaekyoung bandwidthcostminimizationviauserassociationforenterprisewlans