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Method for measuring location of radio frequency identification reader by using beacon

  • US RE47,013 E1
  • Filed: 01/12/2016
  • Issued: 08/28/2018
  • Est. Priority Date: 05/23/2007
  • Status: Active Grant
First Claim
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1. A radio frequency identification (RFID) system for measuring a location of an RFID reader by using a beacon short-range wireless communication system, the short-range wireless communication system comprising:

  • a plurality of beacon devices transmitters, each of which is fixed at a reference location and comprises an antenna, a processor and configured to create a database of a memory having computer executable instructions stored thereon that, when executed by the processor, cause each of the beacon transmitters to;

    emit a beacon, wherein each of the beacon transmitters stores information about signal intensities to distances by measuring of the beacon, the information about the signal intensities of the beacon according to distance distances having been obtained based on a propagation environment and emit the beacon which around each of the beacon transmitters, wherein the beacon includes information about the reference location of each beacon device of the plurality of the beacon transmitters and the information about the signal intensities to distances from each beacon device; and

    an RFID reader configured to receive the beacona means for receiving beacons from each of the plurality of beacon devices transmitters,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 theextracting information about signal intensities to distances included in the received beacon and to calculate a current location thereof by using bothfrom the received beacons,measuring signal intensities of the received beacons,determining distances from the respective beacon transmitters based on the measured signal intensities and the information about the signal intensities to distances, andcalculating the location of the means based on reference location locations of the plurality of beacon transmitters and the determined distance distances from each beacon device the plurality of beacon transmitters,wherein the RFID reader calculates means is configured to calculate the current location of the means through a triangulation method using based on the reference location locations of each beacon device the plurality of beacon transmitters and the determined distance distances from each beacon device the beacon transmitters.

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