Experimental evaluation of wireless simulation assumptions


David Kotz, Calvin Newport, Robert S. Gray, Jason Liu, Yougu Yuan, and Chip Elliott. Experimental evaluation of wireless simulation assumptions. Technical Report number TR2004-507, Dartmouth Computer Science, June 2004. ©Copyright the authors. Revision of kotz:axioms-tr. Later revised as kotz:axioms.


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.

Citable with [BibTeX]

Projects: [mobility-models]

Keywords: [manet] [wifi]

Available from the publisher: [page]

Available from the author: [bib] [pdf]
This pdf was produced by the publisher and its posting here is permitted by the publisher.

[Kotz research]