An admission control method for IEEE 802.11e contention access mechanism

IEEE 802.11 Wireless Local Area Network (WLAN) is a shared medium communication network that transmits information over wireless links for all 802.11 stations in its transmission range. With the applications over 802.11 WLAN increasing, customers demand more and more new features and functions. The...

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Main Author:	Chen, Weng Cheow
Format:	Thesis
Language:	English
Published:	2005
Subjects:	Unspecified
Online Access:	http://eprints.utm.my/id/eprint/34730/1/ChenWengCheowMFKE2005.pdf
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spelling	my-utm-ep.347302021-06-22T00:33:10Z An admission control method for IEEE 802.11e contention access mechanism 2005 Chen, Weng Cheow Unspecified IEEE 802.11 Wireless Local Area Network (WLAN) is a shared medium communication network that transmits information over wireless links for all 802.11 stations in its transmission range. With the applications over 802.11 WLAN increasing, customers demand more and more new features and functions. The support of audio, video, real-time voice over IP and other multimedia applications over 802.11 WLAN with Quality of Service (QoS) requirements is the key for 802.11 WLAN to be successful in multimedia home networking and future wireless communications. Recently, the IEEE 802.11 task group e specified a distributed access approach, called Enhanced Distributed Channel Access (EDCA), which supports service differentiation in the Medium Access Control (MAC) layer. It ensures the packets sent by each mobile station can be differentiated by assigning different access parameters. However, no assurance can be given to higher priority traffic in terms of throughput and delay performance. The problem is especially apparent when the wireless channel is overloaded causing the bandwidth share of each flow to diminish. Admission control is the solution for the problem addressed above. In this research, a simple measurement based admission control method is proposed to enhance the QoS of EDCA network when it is heavily loaded. The proposed method can control the number of allowed wireless stations in the WLAN network without degrading the QoS (medium access delay and throughput) of the existing flows under a high load condition. Several QoS parameters such as delay and throughput are analyzed to investigate the performance of the proposed method. The simulation is done using Network Simulator ns-2 to study the QoS. The results have shown that the proposed method can protect the QoS of high priority applications and at the same time sacrificing the QoS of low priority flow at a moderate level. 2005 Thesis http://eprints.utm.my/id/eprint/34730/ http://eprints.utm.my/id/eprint/34730/1/ChenWengCheowMFKE2005.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:94428?queryType=vitalDismax&query=An+admission+control+method+for+IEEE+802.11e+contention+access+mechanism&public=true masters Universiti Teknologi Malaysia, Faculty of Electrical Engineering Faculty of Electrical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	Unspecified
spellingShingle	Unspecified Chen, Weng Cheow An admission control method for IEEE 802.11e contention access mechanism
description	IEEE 802.11 Wireless Local Area Network (WLAN) is a shared medium communication network that transmits information over wireless links for all 802.11 stations in its transmission range. With the applications over 802.11 WLAN increasing, customers demand more and more new features and functions. The support of audio, video, real-time voice over IP and other multimedia applications over 802.11 WLAN with Quality of Service (QoS) requirements is the key for 802.11 WLAN to be successful in multimedia home networking and future wireless communications. Recently, the IEEE 802.11 task group e specified a distributed access approach, called Enhanced Distributed Channel Access (EDCA), which supports service differentiation in the Medium Access Control (MAC) layer. It ensures the packets sent by each mobile station can be differentiated by assigning different access parameters. However, no assurance can be given to higher priority traffic in terms of throughput and delay performance. The problem is especially apparent when the wireless channel is overloaded causing the bandwidth share of each flow to diminish. Admission control is the solution for the problem addressed above. In this research, a simple measurement based admission control method is proposed to enhance the QoS of EDCA network when it is heavily loaded. The proposed method can control the number of allowed wireless stations in the WLAN network without degrading the QoS (medium access delay and throughput) of the existing flows under a high load condition. Several QoS parameters such as delay and throughput are analyzed to investigate the performance of the proposed method. The simulation is done using Network Simulator ns-2 to study the QoS. The results have shown that the proposed method can protect the QoS of high priority applications and at the same time sacrificing the QoS of low priority flow at a moderate level.
format	Thesis
qualification_level	Master's degree
author	Chen, Weng Cheow
author_facet	Chen, Weng Cheow
author_sort	Chen, Weng Cheow
title	An admission control method for IEEE 802.11e contention access mechanism
title_short	An admission control method for IEEE 802.11e contention access mechanism
title_full	An admission control method for IEEE 802.11e contention access mechanism
title_fullStr	An admission control method for IEEE 802.11e contention access mechanism
title_full_unstemmed	An admission control method for IEEE 802.11e contention access mechanism
title_sort	admission control method for ieee 802.11e contention access mechanism
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2005
url	http://eprints.utm.my/id/eprint/34730/1/ChenWengCheowMFKE2005.pdf
_version_	1747816242468618240

An admission control method for IEEE 802.11e contention access mechanism

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