Analysis of QoS for the EDCA and HCCA mechanisms by simulation in a WLAN for voice, video, and data

This paper's main objective is to analyze the quality of service using the network simulator NS2, in an infrastructure WLAN for voice, video, and data with IEEE 802.11g and IEEE 802.11e standards by access types DCF (Distributed Coordination Function), Enhanced Distributed Channel Access (EDCA) and Hybrid Coordination Function Controlled Channel Access (HCCA). For this purpose, comparative studies of the performance of DCF, EDCA and HCCA access methods are performed for each type of traffic, using metrics such as transmission rate, end-to-end delay and collision percentage.