Flow-Level Simulation of Call Admission Control schemes in EDCA-based WLANs

A flow-level simulator of EDCA-based WLANs to evaluate Call Admission Control (CAC) schemes and MAC parameters tuning algorithms is presented. A novel Admission Control scheme for infrastructure WLANs is evaluated. This Admission Control uses an adaptive MAC parameter tuning algorithm which decides the best instantaneous configuration of MAC parameters in order to: i) guarantee the QoS requirements for sensitive flows (such as VoIP) and ii) maximize the best-effort throughput (web browsing and P2P transfers). Results, compared with the standard EDCA and DCF, show clearly how this proposal provides a higher performance to sensitive flows with a controlled balance for the non-sensitive traffic.