International Journal of Innovative Research in Science, Engineering and Technology (IJIRSET)
In the era of information and communication technology, WLANs are being used for military, multimedia and health application, where high system performance and the ability to stay in link are extremely required. WLAN supports best-effort service at lower investment and cost. Apart from low cost, IEEE 802.11 technology is relatively easy, quick to install, and operating on a unlicensed frequency of 2.4 GHz which can be built independently by the individual or organization without reliance on operator. With the increasing demand and penetration of wireless services, users now expect good Quality of Services (QoS), in terms of delay; media access delay, throughput, and retransmission attempts.