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In recent years, there has been a rapid growth of interest in bandwidth estimation of communication networks. In the context of packet-switched data networks, such as the Internet, the term bandwidth commonly refers to the amount of information a network can deliver per time unit. Knowledge of bandwidth characteristics is of great significance in, e.g., end-to-end admission control, capacity planning, intelligent routing, audio/video streaming, and peer-to-peer applications.
We further develop and evaluate the BART (Bandwidth Available in Real-Time) method for real-time estimation of end-to-end available bandwidth of a network path. The available bandwidth corresponds to the minimum unused bandwidth capacity among all links between two nodes of a network. BART uses active probing and Kalman filtering to accomplish the estimation; probing implies injection of specific data packets, which are expected to be affected by the characteristics of the utilized network path. Experiments are being continuously performed in our laboratory networks as well as over the Internet. Read more
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