Analysis of Enhanced Distributed Channel Access protocol under non-saturation

摘要

Nowadays, there is an increase in the use of real time applications in public locations through wireless networks. Enhanced Distributed Channel Access protocol was issued to support quality of service for the real time applications. It came to overcome the lack in Distributed Coordination Function protocol in order to support quality of service. In this paper, Markov chain model is designed to analyze Enhanced Distributed Channel Access protocol under saturation and non-saturation. Our Markov chain model is able to calculate the throughput for uplink and downlink separately. Through the analysis, the access point is considered as the bottleneck of the wireless network, and affects supporting more real time applications users negatively. In addition, the analysis presents the effect of changing the value of contention window minimum on the throughput of the network.