Patent ID: 8380222

Claim:
A method of determining the location of a mobile device in a network having a plurality of bases stations, in which a base station communicates with the mobile device in a downlink transmission and the mobile device communicates with a base station in uplink transmission, comprising the steps of: (a) receiving signals transmitted by the mobile device at a plurality of sensors; (b) for each sensor: (i) estimating a range between the mobile device and the sensor as a function of the received signal; (ii) estimating an error associated with the received signal at the sensor; (iii) determining a distance between the sensor and a candidate location of the mobile device; (iv) comparing the estimated range adjusted by the estimated error to the determined distance to the candidate location; and (v) weighting the candidate location as a function of the comparison, wherein the weighting is greater for the case when the estimated range adjusted by the estimated error is greater than the determined distance to the candidate location than for the case when the estimated range adjusted by the estimated error is less than the determined distance to the candidate location; and (c) estimating the location of the mobile as a function of the weighted candidate solutions.