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APPARATUS FOR COMMUNICATING WTIH RFID TAG

  • US 20110316675A1
  • Filed: 09/09/2011
  • Published: 12/29/2011
  • Est. Priority Date: 03/30/2009
  • Status: Abandoned Application
First Claim
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1. An apparatus for communicating with a radio frequency identification (RFID) tag configured to perform radio communication with an RFID tag circuit element having an IC circuit part that stores information and a tag antenna that performs information transmission and reception, the apparatus comprising:

  • an apparatus antenna configured to form a communication range where a radio communication is able to be performed and performs radio communication with said RFID tag circuit element located in said communication range;

    a signal transmitting portion configured to transmit a response request signal to said RFID tag circuit element by said apparatus antenna;

    an information obtainment portion configured to obtain tag identification information stored in said IC circuit part of said RFID tag circuit element from a response signal transmitted from said RFID tag circuit element in response to said response request signal and received by said apparatus antenna;

    an identification information storage portion configured to store said tag identification information obtained by said information obtainment portion;

    a calculation portion configured to calculate a duplicated obtainment ratio by the number of redundantly obtained pieces of information of a current obtainment result of said tag identification information by said information obtainment portion to a past obtainment result of said tag identification information stored in said identification information storage portion and by said obtainment result;

    a comparison portion configured to compare said duplicated obtainment ratio calculated by said calculation portion with a threshold value for comparison; and

    a communication control portion configured to execute communication control of widening a communication range of said apparatus antenna in at least the case that said duplicated obtainment ratio is less than said threshold value for comparison and of narrowing the communication range of said apparatus antenna in at least the case that said duplicated obtainment ratio exceeds said threshold value for comparison on the basis of a comparison result by said comparison portion.

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