access icon openaccess Implementation study of wearable sensors for activity recognition systems

This Letter investigates and reports on a number of activity recognition methods for a wearable sensor system. The authors apply three methods for data transmission, namely ‘stream-based’, ‘feature-based’ and ‘threshold-based’ scenarios to study the accuracy against energy efficiency of transmission and processing power that affects the mote's battery lifetime. They also report on the impact of variation of sampling frequency and data transmission rate on energy consumption of motes for each method. This study leads us to propose a cross-layer optimisation of an activity recognition system for provisioning acceptable levels of accuracy and energy efficiency.

Inspec keywords: patient monitoring; health hazards; assisted living

Other keywords: stream based scenarios; energy efficiency; processing power; wearable sensors; feature based scenarios; activity recognition systems; data transmission; battery lifetime; threshold based scenarios

Subjects: Biomedical communication; Patient care and treatment; Biomedical engineering

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