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Distance measurement device and distance measurement method

  • US 9,513,101 B2
  • Filed: 10/04/2013
  • Issued: 12/06/2016
  • Est. Priority Date: 10/04/2013
  • Status: Active Grant
First Claim
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1. A distance measurement device, comprising:

  • a transceiver that, in a distance measurement process between the distance measurement device and a communication device,transmits a command to the communication device of a network system configured to include the distance measurement device and the communication device, andreceives a response from the communication device as a response to the command; and

    a distance measurement controller thatinstructs the transceiver to transmit the command when starting the distance measurement process,measures a period of time until the response is received after the command is transmitted, andcalculates a distance between the distance measurement device and the communication device on the basis of the measured period of time,wherein, before repeatedly executing the distance measurement process, the distance measurement controller determines, on the basis of a comparison result of the calculated distance and a specified amount, the number of times the distance measurement process, which is until the distance is calculated after the command is transmitted, is repeated,wherein a communication cycle of the communication device is adjusted based on the calculated number of times the distance measurement process is repeated.

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