Patent ID: 8170579
Filing Date: 2012-05-01
Classification: G01S,H04W

Abstract:
1. A method of estimating location of a mobile device in a geographic region comprising the steps of: (a) providing a plurality of grid points in a geographic region, each of said grid points including at least one characterizing parameter and each of said grid points located on a grid defined over said geographic region; (b) providing a plurality of network measurement reports for a mobile device in said geographic region; and (c) determining an estimated location for said mobile device from one network measurement report as a function of said at least one parameter, wherein the step of determining an estimated location for said mobile device comprises: (i) comparing an ordered list of cells neighboring a cell serving said mobile device in said one network measurement report to an ordered list of neighboring cells in each grid point of said grid, said ordering being a function of at least one parameter of said one network measurement report; and (ii) generating an estimated location of said mobile device wherein said estimated location is selected from the group consisting of: a centroid of a cluster of matching grid points in said grid; a highest joint probability matching grid point in said grid; a weighted sum of the locations of a set of matching grid points in said grid; a weighted sum of clustered locations of a set of matching grid points in said grid; and as a function of estimated locations determined from subsets of said plurality of network measurement reports.