IEEE 802.11 wireless LAN is considered one of the most popular wireless technology all over the world because of its low cost and easy deployment. The support of quality of service (QoS) in medium access control (MAC) protocol is important in meeting the QoS requirements of real-time traffic such as guaranteed packet delay and packet loss probability. In this paper, the performance of the proposed admission control algorithm and different VBR video traffic are analyzed. In the analysis, three mean data rates of video flows ( 300 kbps, 600 kbps and 1 Mbps) were also considered.