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Cloud-coordinated location system using ultrasonic pulses and radio signals

  • US 9,609,482 B1
  • Filed: 12/07/2015
  • Issued: 03/28/2017
  • Est. Priority Date: 12/07/2015
  • Status: Active Grant
First Claim
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1. A method comprising:

  • outputting, by a mobile computing device, a first radio signal that includes a first data packet, wherein the first data packet includes information indicating that the mobile computing device is requesting initiation of a ranging operation, wherein the ranging operation comprises an operation performed by the mobile computing device to determine a location of the mobile computing device;

    after outputting the first radio signal, outputting, by the mobile computing device, an ultrasonic pulse that includes a second data packet;

    after outputting the ultrasonic pulse, receiving, by the mobile computing device, a second radio signal that includes a third data packet from a beacon device, wherein the third data packet includes information identifying the beacon device as a source of the third data packet;

    determining, by the mobile computing device, a time difference between outputting the ultrasonic pulse and receiving the second radio signal; and

    determining, by the mobile computing device and based at least in part on the third data packet and the time difference, the location of the mobile computing device.

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