International Journal of Computer Applications
GPS (Global Positioning System) is a widely used and a very popular system for tracking devices and finding out the location of the devices in the outdoor locations. But it is not successful for indoor localization because of reflections of the signals due to walls and presence of furniture and various other factors causing signal attenuation inside a building. Hence, WLAN, Bluetooth, RFID, Wi-Fi are being used for finding positions of devices being carried by people inside a building. Bluetooth, having low power consumption and low cost can be easily found in every single device from a cheap cell phone to a costly Smartphone and laptops.