NDLI: QoS Provisioning in IEEE 802.11 Wireless LANs

Content Provider	IEEE Xplore Digital Library
Author	Tran, S.N.H. Wonjun Lee
Copyright Year	2006
Description	Author affiliation: Dept of Comput. Sci. & Eng., Korea Univ., Seoul, South Korea (Tran, S.N.H.)
Abstract	The service differentiation provided in the IEEE 802.11e can only offer soft guarantees to the real-time traffic. Admission control is to provide better quality of service guarantees. We present the performance study of distributed admission control for IEEE 802.11e EDCF mechanism. Our observations show that using a distributed or centralized approach may not be the best solution and proper partitioning of the bandwidth is crucial in achieving better channel utilization and goodput. It has been shown that EDCF performs better at low load and has better delay characteristics, where as HCF has better jitter characteristics and works better in medium to high load conditions. We propose class-based admissibility ratio based on WFQ and priorities of the traffic classes. We also introduce the mechanism of provisional TXOP allocation using which the unused time of higher priority flows can be allocated to lower priority flows. We feel that an integrated approach adapting to the changes in the network and load of each of the access categories could perform better.
Starting Page	23
Ending Page	28
File Size	7458090
Page Count	6
File Format	PDF
ISBN	1424405688
DOI	10.1109/CCE.2006.350854
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-10
Publisher Place	Vietnam
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless LAN Distributed admission control (DAC) Hybrid Coordination Function (HCF) Transmission Opportunity (TXOP) Quality of service Telecommunication traffic Jitter Throughput Delay Computer science Access Category (AC) Admission control Bandwidth Traffic control Enhanced Distributed Coordination Function (EDCF)
Content Type	Text
Resource Type	Article

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