Abstract: Real time location system is used to track object in real time. Here real time mean little near to live location of object. GPS is used for location tracking, but is useful at outdoor location and difficult to track at indoor environment. In GPS GPS-module work as receiver which receive signal from satellite, satellites location are known to GPS module after receiving signal GPS-module calculate distance from satellite and determine location. It only useful for outdoor environment. Indoor asset tracking is a unique specialty of many types of RTLS, as Global Positioning Systems (GPS) have difficulty to provide asset localization within buildings. RTLS deployments generally address the problems of determining the location of equipment and products in a warehouse or even tracking employees and files in an office. The most common RTLS uses a Wi-Fi infrastructure to determine the location of tagged assets. These systems employ Received Signal Strength Indication (RSSI) techniques to wirelessly determine asset location. In this report RF Based indoor asset tracking system is describe. In which sub 1 Ghz RF chip is used.

Keywords: Radio Frequency (RF),Location based service (LSB), (Radio Frequency Identification(RFID),Real Time Location System (RTLS),Non-Line of Sight (NLOS), Angle of arrival (AoA), Time of Arrival (ToA),(Time Difference of Arrival (TDoA),Receive signal strenght (RSS)Real Time Localization (RTL),Texas Instrument(TI).