A smart environmental solution that can wirelessly locate things and people within an accuracy of 1 m can be of great benefit for monitoring the health and status of aging populations. The future of such intelligent positioning systems has been brought closer to reality through the work of researchers at Kaunas University of Technology (KTU), Lithuania.
Global Positioning Systems (GPS) are widely used for localization outdoors but are not applicable to the indoor 
The technology is applicable to any existing device having a Wi-Fi sender/receiver and a data processor. Source: KTU environment. The use of wireless local area networks (WLANs) for indoors has, to date, demonstrated low accuracy and high cost due to the need for installation of positioning software in specific devices.
The technology developed at KTU enables localization of persons and things with great accuracy via installation in smartphones and other devices featuring a Wi-Fi sender/receiver. The system scans surrounding wireless stations and selects the two emitting the strongest signals after measuring the distance between the device and the stations.
The system can distinguish if a person is standing or laying down, and additional sensors can be incorporated to monitor the behavior and position of health care patients or senior citizens, and send alerts to caregivers and family.
Additional applications for the WLAN-based positioning scheme might include use in advanced process control technologies, human-machine interfaces, condition monitoring, smart logistics with advanced transport and real-time warehouse management.
