Patent ID: 9736701
Date: 2017-08-15
CPC Classifications: G01C,G06F,H04W

Claim:
1. A method comprising: collecting proximity data using a plurality of proximity sensors of the mobile device; determining a position of the mobile device in relation to a user of the mobile device, the position determined using the proximity data; determining a first geographic location of a mobile device using an absolute geographic location measurement; and selecting a maximum allowed period of time from a plurality of maximum allowed periods of time, based on the position of the mobile device in relation to the user determined using the proximity data, to track the mobile device using a dead reckoning technique, wherein the dead reckoning technique comprises determining a second geographic location of the mobile device based, at least in part, on information indicative of displacement of the mobile device from the first geographic location; and wherein each of the plurality of maximum allowed periods of time is associated with a different position of the mobile device in relation to the user.