Currently, there are an estimated 24 million people
diagnosed with some form of dementia [55] and several research
studies are focusing on improving their quality of life. In
2006, a wireless healthcare service system was developed [10],
which integrated the following technologies; RFID, GPS, global
system for mobile communications (GSM), as well as a
geographic information system (GIS) to construct a stray prevention
system without interfering in daily life activities.