In this article we conduct an experimental study of the enhanced distributed channel access
mechanism of the upcoming 802.11 e standard. The main focus of the study is on two …

Although IEEE 802.11 based wireless local area networks have become more and more
popular due to low cost and easy deployment, they can only provide best effort services and …

The 802.11 e working group has recently proposed the hybrid coordination function (HCF) to
provide service differentiation for supporting real-time transmissions over 802.11 WLANs …

One of the main challenges with 802.11 e EDCA is the configuration of the open parameters
of this mechanism, namely AIFS, CWmin, CWmax and TXOP_limit. In this paper, we address …

Under heterogeneous radio conditions, Wireless LAN stations may use different modulation
schemes, leading to a heterogeneity of bit rates. In such a situation, 802.11 DCF allocates …

The draft IEEE 802.11 e standard aims at providing quality of service (QoS) support in
802.11 wireless local area networks (WLANs). Enhanced distributed coordination function …

In this paper, we first present an analytical model to study the distribution of the backoff delay
in an 802.11 DCF WLAN under saturation conditions. We show that, with our method, the …

Although the EDCA access mechanism of the 802.11 e standard supports legacy DCF
stations, the presence of DCF stations in the WLAN jeopardizes the provisioning of the …

In this paper, we present MPARC (Multi-Priority Admission and Rate Control), a novel joint
admission control and rate policing protocol for multi-priority ad hoc networks. MPARC is …

The MAC layer of the 802.11 standard, based on the CSMA/CA mechanism, specifies a set
of parameters to control the aggressiveness of stations when trying to access the channel …