Modeling TCP Throughput: A Simple Model and its Empirical Validation

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Modeling TCP Throughput: A Simple Model and its Empirical Validation (1998)

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by Jitendra Padhye , Victor Firoiu , Don Towsley , Jim Kurose

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1336 - 36 self

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@TECHREPORT{Padhye98modelingtcp,
    author = {Jitendra Padhye and Victor Firoiu and Don Towsley and Jim Kurose},
    title = {Modeling TCP Throughput: A Simple Model and its Empirical Validation},
    institution = {},
    year = {1998}
}

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Abstract

In this paper we develop a simple analytic characterization of the steady state throughput, as a function of loss rate and round trip time for a bulk transfer TCP flow, i.e., a flow with an unlimited amount of data to send. Unlike the models in [6, 7, 10], our model captures not only the behavior of TCP’s fast retransmit mechanism (which is also considered in [6, 7, 10]) but also the effect of TCP’s timeout mechanism on throughput. Our measurements suggest that this latter behavior is important from a modeling perspective, as almost all of our TCP traces contained more timeout events than fast retransmit events. Our measurements demonstrate that our model is able to more accurately predict TCP throughput and is accurate over a wider range of loss rates. This material is based upon work supported by the National Science Foundation under grants NCR-95-08274, NCR-95-23807 and CDA-95-02639. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.

Keyphrases

simple model tcp throughput empirical validation loss rate national science foundation trip time fast retransmit mechanism fast retransmit event steady state throughput wider range bulk transfer tcp flow grant ncr-95-08274 tcp trace latter behavior tcp timeout mechanism unlimited amount predict tcp throughput simple analytic characterization

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