Patent ID: 8634849
Filing Date: 2014-01-21
Classification: G01S,H04W

Abstract:
1. A method of operating a first mobile communications device, comprising: receiving a location history log from a second mobile communications device including location related information corresponding to at least one point in time, said location related information including at least one of: i) information indicating the location of the second mobile communications device at said at least one point in time or ii) the result of a signal measurement of a signal received from another device at said at least one point in time; and determining information about the location of the first mobile communications device from the received location history log and stored signal measurement information corresponding to one or more signals received from the second mobile communications device, said determined information including a refined estimate of the current location of the first mobile communications device, said refined estimate being based on a location estimate generated from a signal received from a fixed anchor point in addition to said received location history log, said determined information indicating at least one of the current location of the first mobile communications device or a past location of the first mobile communications device; and updating internally stored location history information indicating a path corresponding to movement of the first mobile communications device over a period of time.