Date Added: May 2011
Due to fast development of technology, future communication and transmission are totally depends upon wireless network. Wireless networks are generally less efficient and irregular compared to wired networks, which make Quality of Service (QoS) provision a bigger challenge for wireless communications. The wireless medium has limited bandwidth, higher packet error rate, and higher packet overheads that in total to limit the capacity of the network to offer guaranteed QoS. In response to the increasing QoS challenge in wireless networks, researchers have made significant modifications in Wireless Fidelity (WiFi) in the legacy IEEE 802.11 standards to make possible QoS to end users.