Patent ID: 8548492

Claim:
A method for estimating a location of a subscriber station receiving a first signal from a first base station and receiving a second signal from a second base station where the first and second base stations are nodes in a WiMAX or LTE network, the method comprising: (a) receiving from said subscriber station a message containing a first information and a second information; (b) determining a range ring from said first base station using said first information; (c) determining a location hyperbola using said second information wherein said location hyperbola has said first and said second base stations as foci; and (d) estimating a location of said subscriber station using said range ring and said location hyperbola, wherein the step of estimating a location of said subscriber station includes: (i) determining a serving sector of said first base station for said subscriber station; and (ii) if said range ring and said location hyperbola intersect plural times within said serving sector: (A) determining plural sub-sectors for said serving sector; (B) determining from said message a carrier-to-interference noise ratio (“CINR”) for each of a first and a second neighboring sector to said serving sector; (C) determining a most likely sub-sector from said plural sub-sectors based on a comparison of said CINR for said first and second neighboring sectors; and (D) estimating a location of said subscriber station as a point of intersection of said range ring and said location hyperbola that is within said most likely sub-sector.