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C-MAC: Model-Driven Concurrent Medium Access Control for Wireless Sensor Networks

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5 Author(s)
Mo Sha ; City Univ. of Hong Kong, Hong Kong ; Guoliang Xing ; Gang Zhou ; Shucheng Liu
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This paper presents C-MAC, a new MAC protocol designed to achieve high-throughput bulk communication for data-intensive sensing applications. C-MAC exploits concurrent wireless channel access based on empirical power control and physical interference models. Nodes running C-MAC estimate the level of interference based on the physical signal-to-interference-plus-noise-ratio (SINR) model and adjust the transmission power accordingly for concurrent channel access. C-MAC employs a block-based communication mode that not only amortizes the overhead of channel assessment, but also improves the probability that multiple nodes within the interference range of each other can transmit concurrently. C-MAC has been implemented in TinyOS-1.x and extensively evaluated on Tmote nodes. Our experiments show that C-MAC significantly outperforms the state-of-art CSMA protocol in TinyOS with respect to system throughput, delay and energy consumption.

Published in:

INFOCOM 2009, IEEE

Date of Conference:

19-25 April 2009

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