CrossTrace: cross-layer measurement for IEEE 802.11 wireless testbeds

Authors:
Simon Frohn;Sascha Gübner;Christoph Lindemann
Affiliations:
Department of Computer Science, University of Leipzig, Leipzig, Germany;Department of Computer Science, University of Leipzig, Leipzig, Germany;Department of Computer Science, University of Leipzig, Leipzig, Germany
Venue:
MMB&DFT'10 Proceedings of the 15th international GI/ITG conference on Measurement, Modelling, and Evaluation of Computing Systems and Dependability and Fault Tolerance
Year:
2010

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Abstract

In this paper, we introduce and evaluate CrossTrace, a framework for performing cross-layer measurements in IEEE 802.11 based wireless networks. CrossTrace allows tracing of parameters at MAC-, routing and transport layer in a controlled environment and in a repeatable manner. Possible areas of application include network performance analysis and protocol optimization. Using CrossTrace, we conduct a comprehensive measurement study in a miniaturized testbed, in which we analyze the behavior of the IEEE 802.11 MAC-layer with respect to signal strength and bit error rate. We derive the delivery probability and bit error rate dependent on signal strength and MAC-layer data rate with and without interfering background traffic. We show that even moderate background traffic can significantly degrade network performance.