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Experimental study of concurrent transmission in wireless sensor networks

Published: 31 October 2006 Publication History

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 signal-to-interference-plus-noise-ratio (SINR) exceed a critical threshold. However, we find a significant variation of about 6 dB in the threshold for groups of radios operating at different transmission powers. 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 higher layer protocols.

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      cover image ACM Conferences
      SenSys '06: Proceedings of the 4th international conference on Embedded networked sensor systems
      October 2006
      444 pages
      ISBN:1595933433
      DOI:10.1145/1182807
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      Published: 31 October 2006

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      Author Tags

      1. capture effect
      2. interference
      3. wireless sensor networks

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      SenSys06: ACM Conference on Embedded Network Sensor Systems
      October 31 - November 3, 2006
      Colorado, Boulder, USA

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