US Patent No. 10,039,075

DOUBLE SIDED ROUND TRIP TIME CALIBRATION


Patent No. 10,039,075
Issue Date July 31, 2018
Title Double Sided Round Trip Time Calibration
Inventorship Carlos Horacio Aldana, Mountain View, CA (US)
Assignee QUALCOMM Incorporated, San Diego, CA (US)

Claim of US Patent No. 10,039,075

1. A method of determining a round trip time calibration value with a mobile device, comprising:receiving a plurality of fine timing measurement messages between an initiating station and a responding station including timestamp information indicating when the plurality of fine timing measurement messages are sent and received by the initiating station and the responding station;
determining time of arrival information for the plurality of fine timing measurement messages based on an internal clock in the mobile device;
calculating a plurality of differential time measurements based on a difference between the timestamp information and the time of arrival information for a respective fine timing measurement message in the plurality of fine timing measurement messages;
calculating a responding station calibration value based on the plurality of differential time measurements; and
transmitting the responding station calibration value to the responding station.