Adaptive medium access control for minimum energy reliable data delivery in wireless sensor networks

Authors:
Junhua Zhu;Shan Chen;Brahim Bensaou
Affiliations:
The Hong Kong University of Science and Technology, Kowloon, Hong Kong;The Hong Kong University of Science and Technology, Kowloon, Hong Kong;The Hong Kong University of Science and Technology, Kowloon, Hong Kong
Venue:
Proceedings of the 10th ACM Symposium on Modeling, analysis, and simulation of wireless and mobile systems
Year:
2007

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Abstract

In this paper, we propose and study two adaptive media access control protocols to support probabilistic data delivery reliability in sensor networks using MAC layer retransmissions. Since retransmissions consume energy, our adaptive p-persistent CSMA protocols tune their persistence probabilities in an effort to minimize the expected number of retransmissions that meet a given probabilistic reliability requirement, and thereby minimize energy consumption in the network. We formulate this problem of reliability with minimal energy consumption at the MAC layer as a constrained optimization problem and then derive the algorithms to adapt the persistence probabilities using the Lagrangian dual decomposition method.