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A new approach to measure the utilizable bandwidth

In this work, we study the problem of measuring the achievable bandwidth -- maximum throughput that a flow between two hosts can achieve in the presence of cross-traffic. We use analysis and experiments to show that the achievable bandwidth is not the unused bandwidth -- the bandwidth remaining after subtracting the cross traffic. Therefore, applying the existed available bandwidth measurement techniques, which based on the cross traffic, to this problem would not give good results. In this work, we propose a simple but very powerful method to measure the achievable bandwidth. Experiments show that our approach gives a high accuracy in measuring the achievable bandwidth.