An Quick Available-Bandwidth Measurement Method Based on Link Delay Growth Rate

Available bandwidth(ABW) has become a key indicator of network measurement, in order to measuring measurement accuracy, in particular, the measurement speed with available bandwidth measurement is also very important. This paper proposes a quick available bandwidth method named QuickAbw, which obtains the available bandwidth quickly under the two link delay growth rates. The link delay growth rate is the rate of growth in the interval between probe packets over time when low-intrusion probe packets with equal intervals just cause link congestion. It is worth mentioning that the probe packets stop sending immediately after causing the link node to overflow, so this method has little impact on the link. Simulations show that QuickAbw has higher measurement accuracy and shorter measurement time than other well-known available bandwidth tools for comparison in a network with single bottleneck-link. Finally, we tested in a real environment consistent with the simulation environment settings, and the experimental results were basically consistent with the simulation results.