Determining the distance between devices in a wireless data exchange protocol
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United States of America Patent
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Jun 30, 2020
Grant Date -
Sep 21, 2017
app pub date -
Mar 15, 2017
filing date -
Mar 15, 2016
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Abstract
A method of determining a distance between a first and a second device in a wireless data exchange protocol is presented. The method includes sending an advertising channel Protocol Data Unit (PDU) from the first device; receiving the advertising channel PDU at the second device and responsively sending a scan request scanning PDU from the second device to the first device; receiving the scan request scanning PDU at the first device and responsively sending a scan response scanning PDU from the first device to the second device; calculating a time of flight (TOF) for at least one of the sent PDUs; and determining the distance between the first and second devices using the calculated TOF.
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