There has been a phenomenal increase in the demand of quality-of-service (QoS)
in wireless networks over the years due to rapid growth in the number of wireless
and mobile devices. Such devices are in use to access Internet and QoS aware
applications such as video conferencing, voice-over IP, interactive video-on-demand
and many other multimedia applications. wireless local area networks (WLANs)
confirming to the IEEE 802.11 standard have become extremely popular at an
unprecedented rate. As a result, WLAN networks are gaining the momentum and
making their way into residential, commercial, industrial and public areas. These
trends are more and more accelerated in places like airports, hotels and coffee
shop, this typically has many floating end users. The time stringent applications
are delay sensitive that require throughput and delay bound creates an urgent
need for QoS support in WLANs
