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Method of measuring distance bound using radio frequency identification (RFID) and system thereof

  • US 9,134,413 B2
  • Filed: 01/02/2013
  • Issued: 09/15/2015
  • Est. Priority Date: 08/29/2012
  • Status: Active Grant
First Claim
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1. A method in which a tag assists in measuring a distance bound, the method comprising:

  • receiving a plurality of queries from a reader;

    deciding a response value based on a random number ci included in each query of the plurality of queries and a first bit created in advance through protocol initialization with the reader;

    determining whether or not to transmit a response including the response value based on a random number mi included in each query of the plurality of queries and a second bit created in advance through the protocol initialization with the reader;

    transmitting the response to the reader if it is determined that the response has to be transmitted; and

    calculating a message authentication code based on the random number ci, the random number mi, and the response value, and transmitting the message authentication code to the reader.

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