Authors:
Steffen Dalgard
;
Franck Fleurey
and
Anders E. Liverud
Affiliation:
SINTEF, Norway
Keyword(s):
Time Synchronization, Wireless Information Networks, Remote Sensing, Bluetooth, Bluetooth Smart, Wireless Sensor Network.
Related
Ontology
Subjects/Areas/Topics:
Ad Hoc Networks
;
Applications and Uses
;
Connectivity and Communication
;
Data Manipulation
;
Data Quality and Integrity
;
Home Monitoring and Assisted Living Applications
;
Multimedia
;
Multimedia Signal Processing
;
Obstacles
;
Programming and Middleware
;
Real-Time Constraints
;
Remote Sensing
;
Sensor Networks
;
Software and Architectures
;
Telecommunications
;
Wireless Information Networks
Abstract:
Synchronization of time is essential for correlation of sensor data. For body area network the sensors are distributed over multiple sensor nodes located on different parts of the body. When collecting sensor data using wireless sensor networks, the delay variation can be up to 1000 milliseconds. Physiological sensors, like ECG, accelerometer and gyroscopes, require a timing accuracy in the millisecond range. This paper describes a generic method to provide synchronized timestamps. The method is tested in a Wireless sensor network using Bluetooth and Bluetooth Smart sensor nodes. Results show that the method is usable for correlating sensor data with 50ms sample rate.