naa a22 4500 510794351 CHVBK 20180411083331.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11277-012-0581-y doi (NATIONALLICENCE)springer-10.1007/s11277-012-0581-y The Performance Evaluation of IEEE 802.11e for QoS Support in Wireless LANs [Elektronische Daten] [Yung-Cheng Yao, Jyh-Horng Wen, Chien-Erh Weng] During the past few years the widespread use of the wireless local area networks (WLANs) communication technique is one of the most popular technologies in data telecommunications and networking. With the increasing variety of multimedia applications, it is needed to develop a mechanism for the quality of service (QoS) to support different types of traffic. 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 QoS. In this paper, we pay attention to the enhanced distributed coordination function (EDCF) of WLANs. First, we modify the Ziouva and Antonakopoulous's (ZA's) model and then extend the model to support EDCF. We study the behavior of the station within a Markov chain model, and 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. The numerical results show that the modified model has a better performance than the ZA's model under an ideal channel scenario. Springer Science+Business Media, LLC., 2012 WLANs nationallicence QoS nationallicence EDCF nationallicence Yao Yung-Cheng Department of Electrical Engineering, National Chung Cheng University, Chia-yi, Taiwan, ROC aut Wen Jyh-Horng Department of Electrical Engineering, Tunghai University, Taichung, Taiwan, ROC aut Weng Chien-Erh Department of Electronic Communication Engineering, National Kaohsiung Marine University, Kaohsiung, Taiwan, ROC aut Wireless Personal Communications Springer US; http://www.springer-ny.com 69/1(2013-03-01), 413-425 0929-6212 69:1<413 2013 69 11277 https://doi.org/10.1007/s11277-012-0581-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0581-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yao Yung-Cheng Department of Electrical Engineering, National Chung Cheng University, Chia-yi, Taiwan, ROC aut NATIONALLICENCE 700 1- Wen Jyh-Horng Department of Electrical Engineering, Tunghai University, Taichung, Taiwan, ROC aut NATIONALLICENCE 700 1- Weng Chien-Erh Department of Electronic Communication Engineering, National Kaohsiung Marine University, Kaohsiung, Taiwan, ROC aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 69/1(2013-03-01), 413-425 0929-6212 69:1<413 2013 69 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer