System and method for locating WIMAX or LTE subscriber stations
AssigneeAndrew Corporation
InventorsTariqul Islam, John Carlson
Life of this patent
Estimating the term…
Abstract
A system and 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 LIE network. A message may be received from the subscriber station containing first and second information, and a range ring determined from the first base station using the first information. A location hyperbola may be determined using the second information wherein the location hyperbola has the first and second base stations as foci. A location of the subscriber station may be estimated using the range ring and the location hyperbola.
Claims18
A method for estimating a location of a subscriber station receiving a first signal from a first base station, receiving a second signal from a second base station, and receiving a third signal from a third base station where the first, second, and third 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 second and said third 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) estimating a location of said subscriber station as a point of intersection of said range ring and said location hyperbola that is within said serving sector.
A method for estimating a location of a subscriber station receiving a first signal from a first base station, receiving a second signal from a second base station, and receiving a third signal from a third base station where the first, second, and third 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 second and said third base stations as foci;
- and
- (d) estimating a location of said subscriber station using said range ring and said location hyperbola,
- wherein said WiMAX or LTE network includes a Network Synchronization Unit (“NSU”) wherein said NSU is synchronized to a timing standard and located at a predetermined location, and
- wherein said WiMAX or LTE network includes a predetermined number N base stations and a predetermined number M NSUs wherein
- N>1 and N>M.
A method for estimating a location of a subscriber station receiving a signal from a base station where the base station is a node 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 base station using said first information;
- (c) determining a serving sector of said base station for said subscriber station;
- (d) determining plural sub-sectors for said serving sector;
- (e) determining from said second information a carrier-to-interference noise ratio (“CINR”) for each of a first and a second neighboring sector to said serving sector;
- (f) determining a first sub-sector from said plural sub-sectors based on a comparison of said CINR for said first and second neighboring sectors;
- and
- (g) estimating a location of said subscriber station as a point of intersection of said range ring and a bisector of said first sub-sector.
A system for estimating a location of a subscriber station receiving a first signal from a first base station, receiving a second signal from a second base station, and receiving a third signal from a third base station where the first, second, and third base stations are nodes in a WiMAX or LTE network, comprising:
- (a) a receiver for receiving from said subscriber station a message containing a first information and a second information;
- (b) circuitry for determining a range ring from said first base station using said first information;
- (c) circuitry for determining a location hyperbola using said second information wherein said location hyperbola has said second and said third base stations as foci;
- and
- (d) circuitry for estimating a location of said subscriber station using said range ring and said location hyperbola,
- wherein said circuitry for estimating a location of said subscriber station includes:
- (i) circuitry for determining a serving sector of said first base station for said subscriber station;
- and
- (ii) circuitry for estimating a location of said subscriber station as a point of intersection of said range ring and said location hyperbola that is within said serving sector.
A system for estimating a location of a subscriber station receiving a first signal from a first base station, receiving a second signal from a second base station, and receiving a third signal from a third base station where the first, second, and third base stations are nodes in a WiMAX or LTE network, comprising:
- (a) a receiver for receiving from said subscriber station a message containing a first information and a second information;
- (b) circuitry for determining a range ring from said first base station using said first information;
- (c) circuitry for determining a location hyperbola using said second information wherein said location hyperbola has said second and said third base stations as foci;
- and
- (d) circuitry for estimating a location of said subscriber station using said range ring and said location hyperbola,
- wherein said WiMAX or LTE network includes a Network Synchronization Unit (“NSU”) wherein said NSU is synchronized to a timing standard and located at a predetermined location, and
- wherein said WiMAX or LTE network includes a predetermined number N base stations and a predetermined number M NSUs wherein
- N>1 and N>M.
A system for estimating a location of a subscriber station receiving a signal from a base station where the base station is a node in a WiMAX or LTE network, comprising:
- (a) a receiver for receiving from said subscriber station a message containing a first information and a second information;
- (b) circuitry for determining a range ring from said base station using said first information;
- (c) circuitry for determining a serving sector of said base station for said subscriber station;
- (d) circuitry for determining plural sub-sectors for said serving sector;
- (e) circuitry for determining from said second information a carrier-to-interference noise ratio (“CINR”) for each of a first and a second neighboring sector to said serving sector;
- (f) circuitry for determining a first sub-sector from said plural sub-sectors based on a comparison of said CINR for said first and second neighboring sectors;
- and
- (g) circuitry for estimating a location of said subscriber station as a point of intersection of said range ring and a bisector of said first sub-sector.
Dependencies are inferred from the claim text.