SYSTEMS AND METHODS FOR GENERATING A LOCATION OF A MOBILE DEVICE USING CELL SECTOR INFORMATION

• US 20110034178A1
• Filed: 08/09/2009
• Published: 02/10/2011
• Est. Priority Date: 08/09/2009
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: MEHTA, Chand
• Application Number:
  US12/538,142
• Publication Number:
  US 20110034178A1
• Time in Patent Office: Days
• US Class Current: 455/456.1
• CPC Class Codes: G01S 19/06 employing an initial estimate of the location of the receiver as aiding data or in generating aiding data
• CPC Class Codes: G01S 5/0236 Assistance data, e.g. base station almanac
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

Systems and methods for generating a location of a mobile device using cell sector data are provided. A mobile device is in service connection with a base station, which has a corresponding service area. Upon entering the service area of another base station, the mobile device enters service connection with the second base station in a handoff event. The mobile device and/or the base station determines the location of each of the base stations, and estimates the approximate location of the mobile device based on the locations of the base stations. In one or more implementations, the estimated position can comprise a midpoint of a line joining the two base stations. The systems and methods can be implemented with a random location generator to improve accuracy. The approximate location of the mobile device can be inputted into a GPS-enabled device to reduce times to first fix.

Claims

1. A method of estimating a location of a mobile device, comprising:

identifying a location of a first base station;

detecting an occurrence of a handoff event transferring a service connection of the mobile device from the first base station to a second base station;

identifying a location of the second base station; and

estimating the location of the mobile device based on the detected handoff event and the locations of the first base station and the second base station.

2. The method of claim 1, wherein the estimated location of the mobile device is on a line connecting the location of the first base station and the location of the second base station.

3. The method of claim 2, wherein the estimated location of the mobile device comprises a midpoint of the line.

4. The method of claim 1, wherein the estimating of the location of the mobile device is further based on a velocity of the mobile device.

5. The method of claim 1, further comprising:

updating the estimated location of the mobile device based on a randomly generated point within a dither zone surrounding the estimated location of the mobile device.

6. The method of claim 1, further comprising:

iterating the estimation of the location of the mobile device while the mobile device remains in service with the first base station.

7. The method of claim 1, further comprising:

inputting the location of the mobile device to a GPS-enabled device.

8. A system for estimating a location of a mobile device, comprising:

a server being configured to;

identify a location of a first base station;

detect an occurrence of a handoff event transferring a service connection of the mobile device to the first base station from a second base station;

identify a location of the second base station; and

estimate the location of the mobile device based on the detected handoff event and the locations of the first base station and the second base station.

9. The system of claim 8, wherein the estimated location of the mobile device is on a line connecting the location of the first base station and the location of the second base station.

10. The system of claim 8, wherein the estimated location of the mobile device is further estimated based on a velocity of the mobile device.

11. The system of claim 8, wherein the server is further configured to update the estimated location of the mobile device based on a randomly generated point within a dither zone surrounding the estimated location of the mobile device.

12. The system of claim 8, wherein the server is further configured to iterate the estimated location of the mobile device while the mobile device remains in service with the first base station.

13. The system of claim 8, wherein the server is further configured to input the location of the mobile device to a GPS-enabled device.

14. A system for estimating a location of a mobile device, comprising:

means for serving data to a mobile device, the means for serving being configured to;

identify a location of a first base station;

detect an occurrence of a handoff event transferring a service connection of the mobile device from the first base station to a second base station;

identify a location of the second base station; and

estimate the location of the mobile device based on the detected handoff event and the locations of the first base station and the second base station.

15. The system of claim 14, wherein the estimated location of the mobile device is on a line connecting the location of the first base station and the location of the second base station.

16. The system of claim 14, wherein the estimated location of the mobile device is further estimated based on a velocity of the mobile device.

17. The system of claim 14, wherein the server is further configured to update the estimated location of the mobile device based on a randomly generated point within a dither zone surrounding the estimated location of the mobile device.

18. The system of claim 14, wherein the server is further configured to iterate the estimated location of the mobile device while the mobile device remains in service with the first base station.

19. The system of claim 14, wherein the server is further configured to input the location of the mobile device to a GPS-enabled device.

20. A computer program product, comprising:

a computer-readable medium comprising;

at least one instruction for causing a computer to identify a location of a first base station;

at least one instruction for causing a computer to detect an occurrence of a handoff event transferring a service connection of the mobile device from the first base station to a second base station;

at least one instruction for causing a computer to identify a location of the second base station; and

at least one instruction for causing a computer to estimate a location of the mobile device based on the detected handoff event and the locations of the first base station and the second base station.

21. The computer program product of claim 20, wherein the estimated location of the mobile device is on a line connecting the location of the first base station and the location of the second base station.

22. The computer program product of claim 20, wherein the estimated location of the mobile device is further estimated based on a velocity of the mobile device.

23. The computer program product of claim 20, wherein the computer-readable medium further comprises at least one instruction for causing a computer to update the estimated location of the mobile device based on a randomly generated point within a dither zone surrounding the estimated location of the mobile device.

24. The computer program product of claim 20, wherein the computer-readable medium further comprises at least one instruction for causing a computer to iterate the estimated location of the mobile device while the mobile device remains in service with the first base station.

25. The computer program product of claim 20, wherein the computer-readable medium further comprises at least one instruction for causing a computer to input the location of the mobile device to a GPS-enabled device.

26. A method of estimating a location of a mobile device, comprising:

receiving a location of a first base station to which the mobile device is registered;

receiving a notification of an occurrence of a handoff event transferring a service connection of the mobile device from the first base station to a second base station;

receiving a location of the second base station; and

estimating, in the mobile device, the location of the mobile device based on the detected handoff event and the locations of the first base station and the second base station.

27. The method of claim 26, wherein the estimated location of the mobile device is on a line connecting the location of the first base station and the location of the second base station.

28. The method of claim 27, wherein the estimated location of the mobile device comprises a midpoint of the line.

29. The method of claim 26, wherein the estimating of the location of the mobile device is further based on a velocity of the mobile device.

30. The method of claim 26, further comprising:

updating the estimated location of the mobile device based on a randomly generated point within a dither zone surrounding the estimated location of the mobile device.

31. The method of claim 26, further comprising:

iterating the estimated location of the mobile device while the mobile device remains in service with the second base station.

32. The method of claim 26, further comprising:

inputting the location of the mobile device to a GPS-enabled device.

33. A mobile device, comprising:

a wireless interface; and

a processor, communicating with the wireless interface, the processor being configured to;

receive a location of a first base station to which the mobile device is registered;

receive a notification of an occurrence of a handoff event transferring a service connection of the mobile device from the first base station to a second base station;

receive a location of the second base station; and

estimating, in the mobile device, a location of the mobile device based on the detected handoff event and the locations of the first base station and the second base station.

34. The device of claim 33, wherein the estimated location of the mobile device is on a line connecting the location of the first base station and the location of the second base station.

35. The device of claim 34, wherein the estimated location of the mobile device comprises a midpoint of the line.

36. The device of claim 33, wherein the estimated location of the mobile device is further estimated based on a velocity of the mobile device.

37. The device of claim 33, wherein the processor is further configured to update the estimated location of the mobile device based on a randomly generated point within a dither zone surrounding the estimated location of the mobile device.

38. The device of claim 33, wherein the processor is further configured to iterate the estimated location of the mobile device while the mobile device remains in service with the second base station.

39. The device of claim 33, wherein the processor is further configured to input the location of the mobile device to a GPS-enabled device.

40. A system for estimating a location of a mobile device, comprising:

means for providing a wireless interface; and

means for processing data from the second base station, communicating with the means for providing a wireless interface, the processor being configured to;

receive a location of a first base station to which the mobile device is registered;

receive a notification of an occurrence of a handoff event transferring a service connection of the mobile device from the first base station to a second base station;

receive a location of the second base station; and

estimating, in the mobile device, the location of the mobile device based on the detected handoff event and the locations of the first base station and the second base station.

41. The system of claim 40, wherein the estimated location of the mobile device is on a line connecting the location of the first base station and the location of the second base station.

42. The system of claim 40, wherein the estimated location of the mobile device is further estimated based on a velocity of the mobile device.

43. The system of claim 40, wherein the processor is further configured to update the estimated location of the mobile device based on a randomly generated point within a dither zone surrounding the estimated location of the mobile device.

44. The system of claim 40, wherein the processor is further configured to iterate the estimated location of the mobile device while the mobile device remains in service with the second base station.

45. The system of claim 40, wherein the processor is further configured to input the location of the mobile device to a GPS-enabled device.

46. A computer program product, comprising:

a computer-readable medium comprising;

at least one instruction for causing a computer to receive a location of a first base station to which a mobile device is connected;

at least one instruction for causing a computer to receive a notification of an occurrence of a handoff event transferring a service connection of the mobile device from the first base station to a second base station;

at least one instruction for causing a computer to receive a location of the second base station; and

at least one instruction for causing a computer to estimate a location of the mobile device based on the detected handoff event and the locations of the first base station and the second base station.

47. The computer program product of claim 46, wherein the estimated location of the mobile device is on a line connecting the location of the first base station and the location of the second base station.

48. The computer program product of claim 46, wherein the estimated location of the mobile device is further estimated based on a velocity of the mobile device.

49. The computer program product of claim 46, wherein the computer-readable medium further comprises at least one instruction for causing a computer to update the estimated location of the mobile device based on a randomly generated point within a dither zone surrounding the estimated location of the mobile device.

50. The computer program product of claim 46, wherein the computer-readable medium further comprises at least one instruction for causing a computer to iterate the estimated location of the mobile device while the mobile device remains in service with the second base station.