QoS Issues of Media Access Delay and Throughput in WLAN
To analyze the performance of various MAC protocols in providing QoS to users of WLAN, the metrics used were Throughput, Data Drop, Retransmission and Medium Access Delay. During the evaluation of EDCF, the performance of various access categories was the determining factor. Two scenarios, with same Physical and MAC parameters, one implementing the DCF and other EDCF, were created in the network simulation tool (OPNET MODELER) to obtain the results. The results showed that the performance of EDCF was better in providing QoS for real-time interactive services (like video conferencing) as compared to DCF, because of its ability to differentiate and prioritize various services.