Evaluation of Quality of Service Schemes for IEEE 802.11 Wireless LANs
LCN '01 Proceedings of the 26th Annual IEEE Conference on Local Computer Networks
Non-saturation and saturation analysis of IEEE 802.11e EDCA with starvation prediction
MSWiM '05 Proceedings of the 8th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
Analysis of EDCA MAC throughput for the IEEE 802.11e WLANs
ICCIT '07 Proceedings of the 2007 International Conference on Convergence Information Technology
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
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There has been considerable research into the performance of the enhanced IEEE 802.11e standard in recent years. Majority of the performance analysis has been based on simulations and analytical models, with little testing done in a real-world environment. We investigate the behaviors of the Enhanced Distributed Channel Access (EDCA) and legacy Distributed Coordination Function (DCF) based on a testbed operating in a realistic working environment. Both TCP/UDP streams representing traffic types such as FTP and VoIP are tested. Quality of Service (QoS) metrics such as Throughput and Delay are calculated directly from a passive capture of the channel. These metrics can also be converted into physical layer requirements such as Signal to Noise ratio. EDCA and DCF are shown to have similar performances with single streams of traffic, which are contributed directly by the loss effect at the MAC layer.