Patent ID: 8629773

Claim:
A radio frequency identification (RFID) system for measuring a location of an RFID reader by using a beacon, the system comprising: a plurality of beacon devices, each of which is fixed at a reference location and configured to create a database of information about signal intensities to distances by measuring signal intensities of the beacon according to distance based on a propagation environment and emit the beacon which includes information about the reference location of each beacon device and the information about signal intensities to distances from each beacon device; and an RFID reader configured to receive the beacon from each of the plurality of beacon devices, measure a signal intensity of each received beacon, determine a distance from each beacon device by analyzing the measured signal intensity on the basis of the information about signal intensities to distances included in the received beacon and to calculate a current location thereof by using both the information about the reference location and the determined distance from each beacon device, wherein the RFID reader calculates the current location through a triangulation method using the reference location of each beacon device and the determined distance from each beacon device.