I-D Action:draft-irtf-tmrg-tools-05.txt

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	Title           : Tools for the Evaluation of Simulation and Testbed Scenarios
	Author(s)       : S. Floyd, et al.
	Filename        : draft-irtf-tmrg-tools-05.txt
	Pages           : 33
	Date            : 2008-02-23

This document describes tools for the evaluation of simulation and
 testbed scenarios used in research on Internet congestion control
 mechanisms.  We believe that research in congestion control
 mechanisms has been seriously hampered by the lack of good models
 underpinning analysis, simulation, and testbed experiments, and that
 tools for the evaluation of simulation and testbed scenarios can
 help in the construction of better scenarios, based on better
 underlying models.  One use of the tools described in this document
 is in comparing key characteristics of test scenarios with known
 characteristics from the diverse and ever-changing real world.
 Tools characterizing the aggregate traffic on a link include the
 distribution of per-packet round-trip times, the distribution of
 connection sizes, and the like.  Tools characterizing end-to-end
 paths include drop rates as a function of packet size and of burst
 size, the synchronization ratio between two end-to-end TCP flows,
 and the like.  For each characteristic, we describe what aspects of
 the scenario determine this characteristic, how the characteristic
 can affect the results of simulations and experiments for the
 evaluation of congestion control mechanisms, and what is known about
 this characteristic in the real world.  We also explain why the use
 of such tools can add considerable power to our understanding and
 evaluation of simulation and testbed scenarios.

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