A Geometric Distribution for Backoff Time in IEEE 802.11 DCF: An Analytical Study
Today's networks, including WLANs, transport different classes of services. A service differentiation is then essential to provide Quality of Service (QoS). However, IEEE 802.11 for WLANs was primarily designed for best effort traffic and did not provide QoS specifications. IEEE 802.11e MAC has been then described to support QoS in WLAN. In this paper, the authors propose a new scheme for service differentiation which is based on the 802.11 standard and requires minor modifications. In fact, they act on DCF which uses the backoff procedure to solve contention in WLANs.