Patent ID: 8988285
Filing Date: 2015-03-24
Classification: G01S,G05D

Abstract:
1. A method for determining location of a target within an area having a plurality of beacons, comprising: i) mapping the area into a plurality of cells; ii) associating one or more beacons in one or more subsets with one or more cells, wherein the one or more beacons are associated in the one or more subsets based upon at least confidence indicators for range measurements derived from one or more beacons for one or more cells; wherein the confidence indicators are at least in part determined using a combination of signal strength, signal quality, and error values for range measurements; and further wherein one or more beacons comprising a subset of beacons for a cell have larger confidence indicators than other beacons when ranging with the target in the cell; iii) ranging by the target to the one or more beacons in the one or more subsets associated with the one or more cells that target is located in to determine the location of the target.