METHOD AND SYSTEM FOR REFINING A LOCATION OF A BASE STATION AND/OR A MOBILE DEVICE BASED ON SIGNAL STRENGTH MEASUREMENTS AND CORRESPONDING TRANSMITTER AND/OR RECEIVER ANTENNA PATTERNS

• US 20110201357A1
• Filed: 03/26/2010
• Published: 08/18/2011
• Est. Priority Date: 02/12/2010
• Status: Abandoned Application

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Inventors: Murray, David, Abraham, Charles, Garrett, David, Lundgren, David Albert, Karaoguz, Jeyhan, Buer, Mark
• Application Number:
  US12/748,270
• Publication Number:
  US 20110201357A1
• Time in Patent Office: Days
• US Class Current: 455/456.2
• CPC Class Codes: G01S 5/0242 Determining the position of transmitters to be subsequently used in positioning G01S5/0289 takes precedence
• CPC Class Codes: G01S 5/02524 Creating or updating the radio-map
• CPC Class Codes: G01S 5/12 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
• CPC Class Codes: H01Q 3/2605 Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A mobile device receives data transmissions, via a coupled receiver antenna array, from a transmitter antenna array of a serving base station. The mobile device determines relative distances, with respect to the serving base station, associated with signal strength measurements on the received data transmissions. The signal strength measurements are compensated, at the mobile device and/or a remote location server, in three-dimensional space based on corresponding transmitter and/or receiver antenna pattern, and/or mobile orientation information for estimating the relative distances. The estimated relative distances are refined by fitting a function of the azimuth and elevation angles. A location for the serving base station and/or the mobile device is determined or refined based on the refined relative distances to be shared among a plurality of users of the remote location server. Fixed or adaptive antenna patterns are supported at the serving base station and/or the mobile device.

Claims

1. A method for communication, the method comprising:

performing by one or more processors and/or circuits in a mobile device comprising a receiver antenna array;

receiving, via said receiver antenna array, data transmissions from one or more antennas in a transmitter antenna array of a serving base station; and

determining relative distances, between said mobile device and said serving base station, associated with signal strength measurements on said received data transmissions, wherein said signal strength measurements are compensated in three-dimensional space based corresponding antenna patterns utilized in said transmitter antenna array and/or said receiver antenna array, and/or mobile orientation information.

2. The method according to claim 1, wherein said receiver antenna array and/or said transmitter antenna array comprise a fixed antenna array and/or an adaptive antenna array.

3. The method according to claim 2, comprising estimating said relative distances between said mobile device and said serving base station based on said signal strength measurements, said corresponding antenna patterns, and/or said mobile orientation information.

4. The method according to claim 3, comprising modeling said estimated relative distances between said mobile device and said serving base station as a function of azimuth and elevation angles.

5. The method according to claim 4, comprising refining said estimated relative distances by fitting said signal strength measurements to said function of azimuth and elevation angles.

6. The method according to claim 5, comprising refining location information for said serving base station and/or said mobile device based on said refined relative distances;

and transmitting said refined location information for said serving base station and/or said mobile device to a remote location server.

7. The method according to claim 6, wherein said remote location server receives signal strength measurements, corresponding transmitter and/or receiver antenna patterns, and/or corresponding mobile orientation information from a plurality of mobile devices in a coverage area served by said serving base station.

8. The method according to claim 7, wherein said remote location server compensates said received signal strength measurements in three-dimensional space based on said received corresponding transmitter and/or receiver antenna patterns, and/or said received corresponding mobile orientation information.

9. The method according to claim 8, wherein said remote location server estimates relative distances between each mobile device and said serving base station based on said compensated signal strength measurements.

10. The method according to claim 9, wherein said remote location server refines location information for said serving base station and/or said each mobile device based on said estimated relative distances.

11. A system for communication, the system comprising:

one or more processors and/or circuits for use in a mobile device comprising a receiver antenna array, said one or more processors and/or circuits being operable to;

receive, via said receiver antenna array, data transmissions from one or more antennas in a transmitter antenna array of a serving base station; and

determine relative distances, between said mobile device and said serving base station, associated with signal strength measurements on said received data transmissions, wherein said signal strength measurements are compensated in three-dimensional space based corresponding antenna patterns utilized in said transmitter antenna array and/or said receiver antenna array, and/or mobile orientation information.

12. The system according to claim 11, wherein said receiver antenna array and/or said transmitter antenna array comprise a fixed antenna array and/or an adaptive antenna array

13. The system according to claim 12, wherein said one or more processors and/or circuits are operable to estimate said relative distances between said mobile device and said serving base station based on said signal strength measurements, said corresponding antenna patterns, and/or said mobile orientation information.

14. The system according to claim 13, wherein said one or more processors and/or circuits are operable to model said estimated relative distances between said mobile device and said serving base station as a function of azimuth and elevation angles.

15. The system according to claim 14, wherein said one or more processors and/or circuits are operable to refine said estimated relative distances by fitting said signal strength measurements to said function of azimuth and elevation angles.

16. The system according to claim 15, wherein said one or more processors and/or circuits are operable to refine location information for said serving base station and/or said mobile device based on said refined relative distances;

and transmitting said refined location information for said serving base station and/or said mobile device to a remote location server.

17. The system according to claim 16, wherein said remote location server receives signal strength measurements, corresponding transmitter and/or receiver antenna patterns, and/or corresponding mobile orientation information from a plurality of mobile devices in a coverage area served by said serving base station.

18. The system according to claim 17, wherein said remote location server compensates said received signal strength measurements in three-dimensional space based on said received corresponding transmitter and/or receiver antenna patterns, and/or said received corresponding mobile orientation information.

19. The system according to claim 18, wherein said remote location server estimates relative distances between each mobile device and said serving base station based on said compensated signal strength measurements.

20. The system according to claim 19, wherein said remote location server refines location information for said serving base station and/or said each mobile device based on said estimated relative distances.