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The IEEE 802.11e standard was introduced to overcome the lack of QoS support for the legacy IEEE 802.11 WLANs. It enhances the Media Access Control (MAC) layer operations to incorporate service differentiation. However, there is a need to prevent overloading of wireless channels since the QoS experienced by traffic flows is degraded with heavily loaded channels. An admission control scheme for IEEE 802.11e WLANs would be the best solution to limit the amount of multimedia traffic so that channel overloading can be prevented. This paper proposes a measurement-aided and model-based admission control scheme for IEEE 802.11e Enhanced Distributed Channel Access (EDCA) Wireless Local Area Networks (WLANs) to provide reasonable bandwidth guarantees for traffic flows.
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