Measurement-assisted model-based call admission control for IEEE 802.11e WLAN contention-based channel access

We first present our recent work on the non-saturation modelling and performance analysis for IEEE 802.11 distributed coordination function. We extended the previous work and developed a model capable of reflecting the non-saturation condition. Employing the model, by introducing a concept of equivalent competing entity, we designed a measurement-aided model-based call admission control scheme for IEEE 802.11e WLANs contention-based channel access - enhanced distributed coordination function (EDCF) to provide guaranteed throughput quality of service (QoS) in a statistical sense. Extensive numerical and simulation results are provided.