Estimating available bandwidth in mobile networks by correlation coefficient

In recent years, as mobile devices increase, the demands for measuring the available bandwidth in a wireless network increase more and more to provide high quality network services. The available bandwidth is one of the most important parameters to determine the sending rate in WAN optimization. Pathload [2] is a technique to measure the available bandwidth by detecting the point where the receiving rate becomes lower than the sending rate of test packets. However, Pathload misdetects this point in mobile networks with packet losses caused by fading, interference, and so on. So, we propose a method to measure the available bandwidth by using correlation coefficients between the sending rate and packet loss rate, and then evaluate the accuracy of the proposed method.