Performance Improvement of IEEE 802.11e to Support QoS in Saturated Conditions

Jyh-Horng Wen; Chien-Erh Weng

ChinaCom2009-Wireless Communications and Networking Symposium

Research Article

Performance Improvement of IEEE 802.11e to Support QoS in Saturated Conditions

Cite: BibTeX Plain Text

@INPROCEEDINGS{10.1109/CHINACOM.2009.5339847,
    author={Jyh-Horng Wen and Chien-Erh Weng},
    title={Performance Improvement of IEEE 802.11e to Support QoS in Saturated Conditions},
    proceedings={ChinaCom2009-Wireless Communications and Networking Symposium},
    publisher={IEEE},
    proceedings_a={CHINACOM2009-WCN},
    year={2009},
    month={11},
    keywords={WLANs DCF EDCF  QoS},
    doi={10.1109/CHINACOM.2009.5339847}
}

Jyh-Horng Wen
Chien-Erh Weng
Year: 2009
Performance Improvement of IEEE 802.11e to Support QoS in Saturated Conditions
CHINACOM2009-WCN
IEEE
DOI: 10.1109/CHINACOM.2009.5339847

Jyh-Horng Wen¹, Chien-Erh Weng²

1: Department of Electrical Engineering, Tunghai University Taichung, Taiwan. ROC
2: Department of Information Management, Shu-Te University Kaohsiung, Taiwan. ROC

Abstract

The IEEE 802.11 protocol has achieved worldwide acceptance with WLANs with minimum management and maintenance costs. However, IEEE 802.11 can only provide a best effort service and does not support the quality of services (QoS). Furthermore, the performance of the Distributed Coordination Function (DCF) degrades significantly under heavy load due to the increasing time wasted during collision. In this paper, we pay attention to the Enhanced Distributed Coordination Function (EDCF) of IEEE 802.11e. We propose a new 802.11 Markov chain model of the station and study the behavior, and then extend the model to support EDCF. We present a more accurate analysis of the EDCF, and also study the saturation throughput when the maximum load that the system can support is reached.

Keywords: WLANs DCF EDCF QoS

Published: 2009-11-20
Publisher: IEEE
Modified: 2010-05-16

: http://dx.doi.org/10.1109/CHINACOM.2009.5339847