A wireless sensor network for hospital security: from user requirements to pilot deployment

Authors:
Ville Kaseva;Timo D. Hämäläinen;Marko Hännikäinen
Affiliations:
Department of Computer and Digital Systems, Tampere University of Technology, Tampere, Finland;Department of Computer and Digital Systems, Tampere University of Technology, Tampere, Finland;Department of Computer and Digital Systems, Tampere University of Technology, Tampere, Finland
Venue:
EURASIP Journal on Wireless Communications and Networking - Special issue on security and resilience for smart devices and applications
Year:
2011

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Abstract

Increasing amount of Wireless Sensor Network (WSN) applications require low network delays. However, current research on WSNs has mainly concentrated on optimizing energy-efficiency omitting low network delays. This paper presents a novel WSN design targeted at applications requiring low data transfer delays and high reliability. We present the whole design flow from user requirements to an actual pilot deployment in a real hospital unit. The WSN includes multihop low-delay data transfer and energy-efficient mobile nodes reaching lifetime of years with small batteries. The nodes communicate using a low-cost low-power 2.4GHz radio. The network is used in a security application with which personnel can send alarms in threatening situations. Also, a multitude of sensor measurements and actuator control is possible with the WSN. A full-scale pilot deployment is extensively experimented for performance results. Currently, the pilot network is in use at the hospital.