Title :
Episodic sampling: Towards energy-efficient patient monitoring with wearable sensors
Author :
Au, Lawrence K. ; Batalin, Maxim A. ; Stathopoulos, Thanos ; Bui, Alex A T ; Kaiser, William J.
Author_Institution :
Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA
Abstract :
Energy efficiency presents a critical design challenge in wireless, wearable sensor technology, mainly because of the associated diagnostic objectives required in each monitoring application. In order to maximize the operating lifetime during real-life monitoring and maintain sufficient classification accuracy, the wearable sensors require hardware support that allows dynamic power control on the sensors and wireless interfaces as well as monitoring algorithms to control these components intelligently. This paper introduces a context-aware sensing technique known as episodic sampling - a method of performing context classification only at specific time instances. Based on additive-increase/multiplicative-decrease (AIMD), episodic sampling demonstrates an energy reduction of 85 percent with a loss of only 5 percent in classification accuracy in our experiment.
Keywords :
accelerometers; biomechanics; cardiology; medical signal processing; notebook computers; patient monitoring; pneumodynamics; sensors; signal classification; signal sampling; wearable computers; additive-increase-multiplicative-decrease episodic sampling; classification accuracy; context classification; context-aware sensing technique; dynamic power control; energy-efficient patient monitoring; wearable sensors; wireless interfaces; Algorithms; Conservation of Energy Resources; Humans; Monitoring, Ambulatory; Respiration; Telemetry;
Conference_Titel :
Engineering in Medicine and Biology Society, 2009. EMBC 2009. Annual International Conference of the IEEE
Conference_Location :
Minneapolis, MN
Print_ISBN :
978-1-4244-3296-7
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2009.5333615