Characterizing and modeling minimum energy operation for subthreshold circuits
Proceedings of the 2004 international symposium on Low power electronics and design
Telos: enabling ultra-low power wireless research
IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks
ATPC: adaptive transmission power control for wireless sensor networks
Proceedings of the 4th international conference on Embedded networked sensor systems
Capturing high-frequency phenomena using a bandwidth-limited sensor network
Proceedings of the 4th international conference on Embedded networked sensor systems
A hardware/software simulation environment for energy harvesting wireless sensor networks
Proceedings of the 9th ACM symposium on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks
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Body area sensor networks (BASNs) have implicit stringent power requirements to meet battery life and form factor expectations, especially in long-term medical monitoring applications. The largest power consumer in BASNs is typically the wireless transceiver, so recent research has focused on increasing on-node signal processing to reduce the number of bits for wireless transmission. This shift increases the importance of power efficient signal processing. Given that the processing workloads and throughput requirements can change dynamically in a BASN, dynamic voltage-frequency scaling (DVFS) becomes an attractive option for providing the necessary processing rate with the minimum power. However, commercial off the shelf (COTS) components typically used in BASN nodes are not designed for DVFS. This paper characterizes the DVFS capabilities of a COTS processor commonly used on BASN nodes -- the TI MSP430 -- and explores the usefulness of these capabilities within the context of BASN applications.