Wireless multimedia LAN architecture using DCF with shortened contention window for QoS provisioning

In this paper, we propose a MAC architecture for IEEE 802.11-like WLANs supporting multimedia services. The main characteristics of the proposed MAC procedure are the period restriction and DCF/SC (Distributed Coordination Function with Shortened Contention-windows) instead. of the PCF (Point Coordination Function) of the IEEE 802.11 standards. We investigate the performance of-the proposed MAC mechanism in terms of utilization, throughput, latency and jitter under two multimedia network environments considered by the IEEE 802.11-Task Group E. These environments are; home and enterprise. In the simulated performance, this novel approach, which preserves the-traffic classification but increases the channel utilization, thus guarantees QoS (Quality of-Service) of multimedia traffics.