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The paper presents PingPair, a novel tool for end-to-end path capacity estimation. The tool is based on the classical packet dispersion technique, enhanced by a novel algorithm for the selection of the best measurement samples based on queueing delay estimation. In addition, PingPair takes into account the measurement noise that afflicts the interarrival times registered by a user level application; the authors experimentally observe the Gaussian nature of such a noise. Since PingPair relies on one-point measurements only, it can be deployed in almost all network scenarios, thus providing maximum flexibility.
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