A class-based queueing service for IEEE 802.11e wireless networks

In order to fairly access a shared wireless channel and allocate network resources, resource management mechanisms are required for controlling link-sharing in wireless local area networks (WLANs), which are expected to support real-time and multimedia applications. We then propose, in this paper, an extended class-based queueing (CBQ) service, based on a controlled hierarchical link-sharing model with a QoS-aware IEEE 802.11e MAC protocol to support sharing of the link bandwidth among different users in a distributed manner. Dynamically adjusting parameters in IEEE 802.11e, e.g., AIFS, CW/sub min/, and CW/sub max/, which are used to control the probability of accessing the channel, our scheme is able to achieve fair channel sharing. Using a simulation approach, we demonstrate the fairness improvement of our scheme is good.