In order to support multimedia applications such as voice and video over the wireless medium, a contentionbased channel access function, called Enhanced Distributed Channel Access (EDCA), has been developed in the emerging standard IEEE 802.11e. In the EDCA, differentiated channel access is provided for different traffic classes. In this paper, we propose a two-level protection and guarantee me...

The random access MAC protocol of WLANs is a key aspect in the actual rapid deployment of WLANs. However, the lack of a hard centralized control of the transmission resources, complicating an efficient implementation of QoS mechanisms without losing the inherent advantages of the distributed access scheme. To solve this difficulties, the EDCA IEEE 802.11e proposal has been released but, critica...

This letter proposes a control theoretic approach to achieve proportional fairness amongst access categories (ACs) in an error-prone EDCA WLAN for provision of distinct QoS requirements and priority parameters. The approach adaptively adjusts the minimum contention window of each AC to derive the station attempt probability to its optimum which leads to a proportional fair allocation of station...

IEEE 802.11 Wireless LAN, popularly known as WiFi, has become the admired source of internet connectivity for most offices well organizations. Due to rapid growth multimedia data and VoIP also provide better quality service (QoS), bandwidth management have important factors in wireless LAN. In Enhanced Distributed Coordination Access (EDCA) mechanism provides QoS with differentiation by setting...