An Energy-Efficient MAC Protocol for Wireless Sensor Networks

An Energy-Efficient MAC Protocol for Wireless Sensor Networks (2002)

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by Wei Ye , John Heidemann , Deborah Estrin

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Datum	Value	Source
TITLE	An Energy-Efficient MAC Protocol for Wireless Sensor Networks	SVM HeaderParse 0.1
AUTHOR NAME	Wei Ye	user correction
AUTHOR NAME	John Heidemann	user correction
AUTHOR NAME	Deborah Estrin	user correction
ABSTRACT	This paper proposes S-MAC, a medium-access control (MAC) protocol designed for wireless sensor networks. Wireless sensor networks use battery-operated computing and sensing devices. A network of these devices will collaborate for a common application such as environmental monitoring. We expect sensor networks to be deployed in an ad hoc fashion, with individual nodes remaining largely inactive for long periods of time, but then becoming suddenly active when something is detected. These characteristics of sensor networks and applications motivate a MAC that is different from traditional wireless MACs such as IEEE 802.11 in almost every way: energy conservation and self-configuration are primary goals, while per-node fairness and latency are less important. S-MAC uses three novel techniques to reduce energy consumption and support self-configuration. To reduce energy consumption in listening to an idle channel, nodes periodically sleep. Neighboring nodes form virtual clusters to auto-synchronize on sleep schedules. Inspired by PAMAS, S-MAC also sets the radio to sleep during transmissions of other nodes. Unlike PAMAS, it only uses in-channel signaling. Finally, S-MAC applies message passing to reduce contention latency for sensor-network applications that require store-andforward processing as data move through the network. We evaluate our implementation of S-MAC over a sample sensor node, the Mote, developed at University of California, Berkeley. The experiment results show that, on a source node, an 802.11-like MAC consumes 2--6 times more energy than S-MAC for traffic load with messages sent every 1-10s.	user correction
YEAR	2002	user correction - Legacy Corrections
CITATIONS	15 found	ParsCit 1.0