Patent ID: 9651678
Date: 2017-05-16
CPC Classifications: G01S,H04W

Claim:
1. A method, by a first mobile device, for controlling use of a location measurement system on the first mobile device, the method comprising: obtaining a region of uncertainty of the first mobile device using an other location measurement system or manually inputted data; receiving data for a region of uncertainty of a second mobile device; displaying a map of both regions of uncertainty of the first mobile device and the second mobile device; computing at least one line that bisects at least one of a horizontal distance and a vertical distance between the region of uncertainty of the first mobile device and the region of uncertainty of the second mobile device; obtaining a current region of uncertainty of the first mobile device and obtaining a current region of uncertainty of the second mobile device; upon detecting the current region of uncertainty of the first mobile device coincides with or has crossed over the at least one line, determining if the current region of uncertainty of the first mobile device is within a predetermined distance from the current region of uncertainty of the second mobile device; in response to detecting that the current region of uncertainty of the first mobile device is within the predetermined distance from the current region of uncertainty of the second mobile device, initiating use of the location measurement system to obtain a secondary location measurement pertaining to the first mobile device; sending the secondary location measurement to the second mobile device; receiving a secondary location measurement pertaining to the second mobile device; and updating resolution of the map to display both of the secondary location measurements of the first mobile device and the second mobile device.