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TCP is the most widely
used transport layer protocol used in the internet today.
A TCP session adapts the demands it places on the network
to observations of bandwidth availability on the network.
Because TCP is adaptive, any model of its behavior that aspires to be
accurate must be influenced by other network traffic.
This point is especially important in the context of
using simulation to evaluate some new network algorithm of interest
(e.g. reliable multi-cast) in an environment where the background
traffic affects---and is affected by---its behavior.
We need to generate background traffic efficiently in a way
that captures the salient features of TCP, while
the reference and background traffic representations
interact with each other.
This paper describes a fluid model of TCP and a switching
model that has flows represented by fluids interacting with
packet-oriented flows. We describe
conditions under which a fluid model
produces exactly the same behavior
as a packet-oriented model, and we
quantify the performance advantages of the approach
both analytically and empirically. We observe that very significant
speedups may be attained while keeping high accuracy.
Bibliographic citation for this report: [plain text] [BIB] [BibTeX] [Refer]
Or copy and paste:
David M. Nicol and Guanhua Yan, "Discrete-Event Fluid Modeling of Background TCP Traffic." Dartmouth Computer Science Technical Report TR2003-454, June 2003.
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