DETERMINING LOCATION OF A TARGET DEVICE BASED ON RELATIVE CHANGE IN LOCATION INFORMATION

• US 20120196616A1
• Filed: 08/03/2011
• Published: 08/02/2012
• Est. Priority Date: 08/06/2010
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Edge, Stephen William
• Granted Patent: US 9,507,027 B2
• Time in Patent Office: Days
• US Class Current: 455/456.1
• CPC Class Codes: G01S 19/10 providing dedicated supplementary positioning signals
• CPC Class Codes: G01S 19/25 involving aiding data received from a cooperating element, e.g. assisted GPS
• CPC Class Codes: G01S 5/0036 of measured values, i.e. measurement on mobile and position calculation on base station
• CPC Class Codes: H04L 67/52 specially adapted for the location of the user terminal
• CPC Class Codes: H04W 4/02 Services making use of location information

Abstract

Techniques are disclosed for determining an absolute location of a mobile device by a server. A relative change in location of a mobile device is computed using local sensors of the mobile device. The relative change in location is transmitted to a location server for estimating, by the location server, an absolute location of the mobile device.

Claims

1. A method for obtaining a location of a mobile device, the method comprising:

computing a relative change in location of the mobile device using local sensors of the mobile device; and

transmitting the relative change in location to a location server for estimating, by the location server, an absolute location of the mobile device.

2. The method of claim 1, further comprising transmitting previous relative location information of the mobile device to the location server in a same message including current relative change information.

3. The method of claim 1, further comprising receiving a request from the location server to provide the relative change in location since a particular previous time.

4. The method of claim 1, further comprising receiving a request from the location server to periodically provide the relative change in location at particular time intervals.

5. The method of claim 1, further comprising transmitting at least one error estimate of the relative change in location.

6. An apparatus for wireless communication, comprising:

means for computing a relative change in location of a mobile device using local sensors of the mobile device; and

means for transmitting the relative change in location to a location server for estimating, by the location server, an absolute location of the mobile device.

7. The apparatus of claim 6, further comprising means for transmitting previous relative location information of the mobile device to the location server in a same message including current relative change information.

8. The apparatus of claim 6, further comprising means for receiving a request from the location server to provide the relative change in location since a particular previous time.

9. The apparatus of claim 6, further comprising means for receiving a request from the location server to periodically provide the relative change in location at particular time intervals.

10. The apparatus of claim 6, further comprising means for transmitting at least one error estimate of the relative change in location.

11. A computer program product for wireless communication in a wireless network, comprising:

a computer-readable medium having non-transitory program code recorded thereon, the program code comprising;

program code to compute a relative change in location of a mobile device using local sensors of the mobile device; and

program code to transmit the relative change in location to a location server for estimating, by the location server, an absolute location of the mobile device.

12. The computer program product of claim 11, further comprising program code to transmit previous relative location information of the mobile device to the location server in a same message including current relative change information.

13. The computer program product of claim 11, further comprising program code to receive a request from the location server to provide the relative change in location since a particular previous time.

14. The computer program product of claim 11, further comprising program code to receive a request from the location server to periodically provide the relative change in location at particular time intervals.

15. The computer program product of claim 11, further comprising program code to transmit at least one error estimate of the relative change in location.

16. An apparatus for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory, the at least one processor being configured to;

compute a relative change in location of a mobile device using local sensors of the mobile device; and

transmit the relative change in location to a location server for estimating, by the location server, an absolute location of the mobile device.

17. The apparatus of claim 16, in which the at least one processor is further configured to transmit previous relative location information of the mobile device to the location server in a same message including current relative change information.

18. The apparatus of claim 16, in which the at least one processor is further configured to receive a request from the location server to provide the relative change in location since a particular previous time.

19. The apparatus of claim 16, in which the at least one processor is further configured to receive a request from the location server to periodically provide the relative change in location at particular time intervals.

20. The apparatus of claim 16, in which the at least one processor is further configured to transmit at least one error estimate of the relative change in location.