Location Detection Using Wifi

There are many approaches for indoor location detection such as using infrared and ultra
sound. Beside that, another powerful approach for indoor location detection is RF (Radio
Frequency). In emergency situation happened in a building such as fires, it is difficult to
make sure all people in the building have left out. It is even worst if there are victim
trapped but no body know where the exactly location of the victims. The project is
construct a network environment based on wireless LAN infrastructure and supports the
protocol over the 802.1 lg. The system is organized by client-server, access points and
PDAs or laptops as client devices. Location determination method is implemented on the
basis of signal strength. The test program developed using the sample provided able to
detect the access points available. The parameter that can be get using the program
including the SSID, MAC address, Network type, WEP, RSSI and etc. To identify the
distance testing has been made based on the RSSI gathered. The testing is made by
calculating manually the distance of the location based on the RSSI collected. The
proposed system is an indoor positioning system based on signal strength measurements,
which were approximated by the received RSSI in a mobile device. The triangulation
method combined with distance estimation is used to predict the position of the terminal.
It is hoped that with some improvement to the proposed system able to work in the
emergency condition