Authors:
Mohamad El Masri
1
;
Guy Juanole
2
and
Slim Abdellatif
1
Affiliations:
1
LAAS-CNRS, INSA, France
;
2
LAAS-CNRS, UPS; University of Toulouse, France
Keyword(s):
Quality Of Service, Wireless Local Area Networks, Modelling, Markov Chain.
Related
Ontology
Subjects/Areas/Topics:
Mobile Software and Services
;
Multimedia and QoS over Wireless Networks
;
Performance Analysis of Wireless Networks
;
Telecommunications
;
Wireless and Mobile Technologies
;
Wireless Information Networks and Systems
Abstract:
IEEE 802.11e specifies the Enhanced Distributed Channel Access (EDCA) for distributed access with traffic differentiation to a Wireless Local Area Network (WLAN). Traffic differentiation led to introducing several traffic queues within each station, thus introducing virtual collision. In this paper, we present a pattern based Markov chain model of EDCA including the virtual collision phenomenon not found in previous work. We also correct the misconceptions found in existing Markov chain models of EDCA (Kong et al., 2004). We thus obtain a more realistic model of IEEE 802.11e EDCA which will allow a more precise performance analysis that may be used for admission control.