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All analytical and simulation research on ad~hoc
wireless networks must necessarily model radio
propagation using simplifying assumptions. Although it
is tempting to assume that all radios have circular
range, have perfect coverage in that range, and
travel on a two-dimensional plane, most researchers
are increasingly aware of the need to represent more
realistic features, including hills, obstacles, link
asymmetries, and unpredictable fading. Although many
have noted the complexity of real radio propagation,
and some have quantified the effect of overly simple
assumptions on the simulation of ad~hoc network
protocols, we provide a comprehensive review of six
assumptions that are still part of many ad~hoc
network simulation studies. In particular, we use an
extensive set of measurements from a large outdoor
routing experiment to demonstrate the weakness of
these assumptions, and show how these assumptions
cause simulation results to differ significantly
from experimental results. We close with a series of
recommendations for researchers, whether they
develop protocols, analytic models, or simulators
for ad~hoc wireless networks.
This paper is significantly revised and extended from TR2003-467,
"The mistaken axioms of wireless-network research."
Bibliographic citation for this report: [plain text] [BIB] [BibTeX] [Refer]
Or copy and paste:
David Kotz, Calvin Newport, Robert S. Gray, Jason Liu, Yougu Yuan, and Chip Elliott, "Experimental evaluation of wireless simulation assumptions." Dartmouth Computer Science Technical Report TR2004-507, June 2004.
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