Evaluation of quality of service schemes for IEEE 802.11 wireless LANs

This paper evaluates four mechanisms for providing service differentiation in IEEE 802.11 wireless LANs, the point coordinator function (PCF) of IEEE 802.11, the enhanced distributed coordinator function (EDCF) of the proposed IEEE 802.11e extension to IEEE 802.11, distributed fair scheduling (DFS),...

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Bibliographic Details
Published in26th Annual IEEE Conference on Local Computer Networks (LCN 2001): Proceedings pp. 348 - 351
Main Authors Lindgren, A., Almquist, A., Schelen, O.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2001
SeriesConference on Local Computer Networks. Proceedings
Subjects
Computer science
Computer simulation
Current measurement
Delay effects
Dependable Communication and Computation Systems
Kommunikations- och beräkningssystem
Local area networks
Quality of service
Road accidents
Throughput
Time measurement
Wireless LAN
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ISBN0769513212
9780769513218
ISSN0742-1303
DOI10.1109/LCN.2001.990806

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Summary:This paper evaluates four mechanisms for providing service differentiation in IEEE 802.11 wireless LANs, the point coordinator function (PCF) of IEEE 802.11, the enhanced distributed coordinator function (EDCF) of the proposed IEEE 802.11e extension to IEEE 802.11, distributed fair scheduling (DFS), and Blackburst using the ns-2 simulator. The metrics used in the evaluation are throughput, medium utilization, collision rate, average access delay, and delay distribution for a variable load of real time and background traffic. The PCF performance is comparably low, while the EDCF performs much better. The best performance is achieved by Blackburst. The DFS provides relative differentiation and consequently avoids starvation of low priority traffic.
ISBN:0769513212
9780769513218
ISSN:0742-1303
DOI:10.1109/LCN.2001.990806