John Heidemann

Experimental Analysis of Concurrent Packet Transmissions in Low-Power Wireless Networks

TitleExperimental Analysis of Concurrent Packet Transmissions in Low-Power Wireless Networks
Publication TypeTechnical Report
Year of Publication2005
AuthorsD. Son, B. Krishnamachari, and J. Heidemann
Date Publisheddec
Institutionusc-isi
Abstract

We undertake a systematic experimental study of the effects of concurrent packet transmissions in low-power wireless networks. Our measurements, conducted with Mica2 motes equipped with CC1000 radios, confirm that guaranteeing successful packet reception with high probability in the presence of concurrent transmissions requires that the \emphsignal-to-interference-plus-noise-ratio (SINR) exceed a critical threshold. However, groups of radios show a wide gray region of about 6dB. We find that this occurs because the SINR threshold can vary significantly depending on the measured signal power and radio hardware. We find that it is harder to estimate the level of interference in the presence of multiple interferers. We also find that the measured SINR threshold generally increases with the number of interferers. Our study offers a better understanding of concurrent transmissions and suggests richer interference models and useful guidelines to improve the design and analysis of wireless network protocols.

URLhttp://www.isi.edu/%7ejohnh/PAPERS/Son05a.html
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