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Wireless Networks
Published in: Wireless Networks 2/2009

01-02-2009

Two-level protection and guarantee for multimedia traffic in IEEE 802.11e distributed WLANs

Authors: Yang Xiao, Frank Haizhon Li, Sunghyun Choi

Published in: Wireless Networks | Issue 2/2009

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Abstract

In order to support multimedia applications such as voice and video over the wireless medium, a contention-based channel access function, called Enhanced Distributed Channel Access (EDCA), has been developed in the emerging standard IEEE 802.11e. In the EDCA, differentiated channel access is provided for different traffic classes. In this paper, we propose a two-level protection and guarantee mechanism for voice and video traffic in the EDCA-based distributed wireless LANs. In the first-level protection, the existing voice and video flows are protected from the new and other existing voice and video flows via a distributed admission control with tried-and-known and early-protection enhancements. In the second-level protection, the voice and video flows are protected from the best-effort data traffic by adopting frame-based and limit-based data control mechanisms. Performance evaluations are conducted in terms of throughput, delay, transmission limit, number of collisions, and throughput square relative difference. Extensive simulation results demonstrate that the proposed two-level protection and guarantee mechanism is very effective in terms of the protection and guarantee of existing voice and video flows as well as the utilization of the channel capacity.
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Metadata
Title
Two-level protection and guarantee for multimedia traffic in IEEE 802.11e distributed WLANs
Authors
Yang Xiao
Frank Haizhon Li
Sunghyun Choi
Publication date
01-02-2009
Publisher
Springer US
Published in
Wireless Networks / Issue 2/2009
Print ISSN: 1022-0038
Electronic ISSN: 1572-8196
DOI
https://doi.org/10.1007/s11276-007-0018-9

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