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Method and system for presence detection

  • US 9,886,696 B2
  • Filed: 04/19/2010
  • Issued: 02/06/2018
  • Est. Priority Date: 07/29/2009
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • generating an identifier that identifies a retail store; and

    transmitting the identifier in the retail store using an ultrasonic signal transmitter that transmits using at least one ultrasonic frequency;

    wherein a server-side processor determines presence of a user at the retail store based on information received from a client-side application of a mobile phone of the user in response to reception of the transmitted ultrasonic signal at the mobile phone of the user, wherein the server-side processor provides the user a reward for presence in the retail store via the client-side application of the mobile phone of the user while the user is present at the retail store, and wherein the server-side processor facilitates varying the identifier transmitted by the transmitter according to a schedule.

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