Science & Engineering Research Support soCiety (SERSC)
Wi-Fi positioning system is widely being studied in many fields of Smartphones. In an open air environment a GPS (Global Positioning System) receiver is able to determine its position with a high level accuracy. But in inside a building, where the GPS signal is bad or unavailable or unappreciated. The position estimation from the GPS receiver is very erroneous and has no practical use. Wi-Fi triangulation system is applied in indoor location but faced signal coverage error. Therefore, the authors propose a method of indoor positioning that determines the user's current position with the nearby Wi-Fi routers and cellular network signal strength RSSI values.