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Systems, methods, and apparatus to permit communication between passive wireless transponders

  • US 9,928,721 B2
  • Filed: 09/24/2013
  • Issued: 03/27/2018
  • Est. Priority Date: 09/24/2013
  • Status: Active Grant
First Claim
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1. A method to determine the relative positions of a number of passive wireless transponders, the method comprising:

  • in response to receipt of an interrogation carrier wave output by an RFID reader, receiving information from each of a plurality of passive wireless transponders identifying at least one neighboring passive wireless transponder, wherein the interrogation carrier wave causes the plurality of passive wireless devices to communicate with each other by outputting backscatter waves between at least some of the plurality of passive wireless devices, at least some of the backscatter waves identifying, by a unique identifier, at least one neighboring passive wireless transponder that is spatially proximate the respective passive wireless transponder from which the backscatter is received; and

    determining a position of the passive wireless transponders relative to one another based at least in part on the information from each of the plurality of passive wireless transponders identifying the at least one neighboring passive wireless transponder.

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