Enhancing the Performance of Wireless Network through Efficient Bandwidth Estimation Technique
I A. Khiruthika Devi, J. Sutha · 2014
Bandwidth estimation is the main issue for quality-of-service (QOS) in Wireless Communication. Recent bandwidth estimation solutions concentrate on either probing techniques or cross-layer techniques and require bandwidth resources with the protocol modifications. To overcome these problems, MBE (Model Based Available Bandwidth Estimation) is used. MBE is based on transmission control protocol or user datagram protocol throughput models for wireless communications. MBE provides the result with the lowest standard deviation and mean value for error rate and overhead. The proposed approach is to extend MBE, which considers the combined effect of TCP and UDP traffic over WLAN and makes use of TCP and UDP over WLAN throughput models introduced before. When TCP and UDP traffic are transmitted together, their throughputs are different with those when TCP and UDP are delivered alone. TCP adopts a congestion control mechanism to adjust the transmission rate to the available bandwidth. UDP is more aggressive to take possible bandwidth, and affect the TCP traffic. The major difference between the TCP and UDP is the consideration of retransmissions of lost packets. The extended MBE is to be used in IEEE802.11e networks which provide multimedia QOS support.