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Proximity detection system

  • US 10,284,566 B2
  • Filed: 04/01/2016
  • Issued: 05/07/2019
  • Est. Priority Date: 04/01/2016
  • Status: Active Grant
First Claim
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1. A device of providing a walk away lock, the device comprising:

  • a transceiver to;

    receive a plurality of data packets from a user device, each packet having corresponding time-to-receive values; and

    receive additional data packets from the user device, each of the additional data packets having corresponding time-to-receive values; and

    a controller to;

    determine a baseline latency value of the plurality of data packets based on the respective time-to-receive values;

    calculate a current latency value of the additional packets based on the respective time-to-receive values; and

    perform a security operation based on the baseline latency value and the current latency value;

    wherein a particular time-to-receive value of the plurality of time-to-receive values comprises the time period from when the compute device started receiving a first byte of the data packet to when the compute device finished receiving a last bye of the data packet, andwherein to calculate the current latency value includes the controller to average the corresponding time-to-receive values of the additional of data packets.

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