Experimental Evaluation of Medium Access Schemes in 802.11 Wireless Networks
Deployment of real time services over 802.11 wireless networks requires Quality of Service (QoS) differentiation mechanisms for different traffic types. This required investigations into the performance of the Medium Access Control (MAC) schemes like Distributed Coordinated Function (DCF) and Enhanced DCF with respect to the stringent QoS requirements imposed by the real time services. Motivation for this research was to find the suitability of 802.11 MAC schemes for real time traffic. In this paper, various available MAC schemes were experimentally evaluated for QoS provisioning in 802.11 wireless networks. Performance evaluation was done based on important QoS metrics like access delay, jitter, packet loss, Round Trip Time (RTT) and throughput of the traffic.