Performance analysis of the enhanced distributed coordination function in the IEEE 802.11e

Yu Liang Kuo, Chi Hung Lu, Eric Hsiao Kuang Wu, Gen Huey Chen, Yi Hsien Tseng

Research output: Contribution to journalConference articlepeer-review

10 Scopus citations


Recently, the IEEE 802.11 Task Group E is standardizing a distributed access approach, called the enhanced distributed coordination function (EDCF), to support service differentiation in WLANs. In EDCF, service differentiation is achieved by assigning different values of EDCF access parameters (e.g., the minimum contention window, the maximum contention window, and the arbitration interframe space) to different traffic classes. In order to satisfy specific QoS requirements for different traffic classes, a mathematical analysis turns to be helpful to analyze the system performance. In this paper, we provide an analytical model to study the expected bandwidth for each traffic class in EDCF. We validate the accuracy of the model by using the ns-2 simulator. Some performance evaluations are demonstrated hi comparison with the IEEE 802.11 legacy MAC protocol. The model can be also used as guidelines for admission control or resource management schemes.

Original languageEnglish
Pages (from-to)3488-3492
Number of pages5
JournalIEEE Vehicular Technology Conference
Issue number5
StatePublished - 2003
Event2003 IEEE 58th Vehicular Technology Conference, VTC2003-Fall - Orlando, FL, United States
Duration: 6 Oct 20039 Oct 2003


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