Facilitation of delay error correction in timing-based location systems

• US 9,591,495 B2
• Filed: 12/15/2015
• Issued: 03/07/2017
• Est. Priority Date: 07/17/2012
• Status: Active Grant

• Current Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Original Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Inventors: Fix, Jeremy, Meredith, Sheldon Kent
• Primary Examiner(s): Lee, John J
• Application Number:
  US14/970,533
• Publication Number:
  US 20160100323A1
• Time in Patent Office: 448 Days
• Field of Search: 455/67.16, 455/456.1, 455/67.11, 455/456.5, 455/456.6, 455/67.13, 455/63.1, 343/357.53, 343/357.46
• US Class Current: 1/1
• CPC Class Codes: G01S 5/021 Calibration, monitoring or correction G01S5/0252 takes precedence
• CPC Class Codes: G01S 5/02527 Detecting or resolving anomalies in the radio frequency fingerprints of the radio-map
• CPC Class Codes: H04B 17/21 for calibration; for correcting measurements
• CPC Class Codes: H04B 17/26 using historical data, averaging values or statistics
• CPC Class Codes: H04B 17/27 for locating or positioning the transmitter
• CPC Class Codes: H04B 17/364 Delay profiles
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/023 using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

Computation of delay error offset information is facilitated. A method can include receiving measurement information indicative of a location of a mobile device, calibrating the measurement information resulting in calibrated measurement information, comparing the calibrated measurement information and historical calibrated measurement information, and computing a measurement error based, at least, on the comparing, wherein the measurement error includes delay error offset information.

Claims

1. A method, comprising:

calibrating, by a system comprising a processor, measurement information associated with a location of a mobile device, wherein the calibrating results in calibrated measurement information;

comparing, by the system, the calibrated measurement information and other calibrated measurement information; and

determining, by the system, a measurement error based on the comparing, wherein the measurement error comprises delay error offset information.

2. The method of claim 1, wherein the measurement information comprises assisted global positioning system measurement information.

3. The method of claim 1, further comprising storing, by the system, the delay error offset information in association with a bin.

4. The method of claim 3, wherein the bin is representative of the location of the mobile device.

5. The method of claim 3, further comprising:

determining, by the system, weights to be applied to frames of the bin, wherein the weights change in value based on a change in value of a distance from a defined center of the bin.

6. The method of claim 5, wherein the weights range from about zero to about one.

7. The method of claim 1, further comprising:

applying, by the system, the delay error offset information to subsequently received measurement information indicative of the location of the mobile device.

8. The method of claim 1, further comprising:

aggregating, by the system, the measurement information for the location received over a period of time.

9. A system, comprising:

a processor; and

a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising;

determining a reference frame of a bin, wherein the bin corresponds to a defined location associated with a physical obstruction; and

distributing delay error offset information to frames of the bin within a defined distance from the reference frame, wherein the delay error offset information comprises weighting information representative of a weighting of the frames within the defined distance by respective values.

10. The system of claim 9, wherein the respective values are percentage values between about 0% and about 100%.

11. The system of claim 9, wherein the respective values change in value as a distance from the reference frame to the location to the frames changes.

12. The system of claim 9, wherein the defined location is based on measurement information derived from assisted global positioning system information.

13. A non-transitory machine-readable storage medium, comprising executable instructions that, when executed by a processor, facilitate performance of operations, comprising:

adjusting measurement information associated with a location of a device pair based on delay error offset information generated for the measurement information, wherein the delay error offset information is a function of a calibration error determined for the measurement information; and

associating the delay error offset information with the location associated with the device pair.

14. The non-transitory machine-readable storage medium of claim 13, wherein the operations further comprise:

generating calibrated measurement information by calibrating the measurement information.

15. The non-transitory machine-readable storage medium of claim 14, wherein the operations further comprise:

determining the calibration error based on a difference between the calibrated measurement information and other calibrated measurement information.

16. The non-transitory machine-readable storage medium of claim 13, wherein the operations further comprise:

locating a mobile device communicatively coupled to the device pair, wherein the locating is based on the measurement information and the delay error offset information.

17. The non-transitory machine-readable storage medium of claim 16, wherein the locating is further based on weights applied to the measurement information, and wherein the weights are a function of physical structures in a geographical region covered by the location.

18. The non-transitory machine-readable storage medium of claim 17, wherein the weights are decimal values between about 0.0 and about 1.0.

19. The non-transitory machine-readable storage medium of claim 13, wherein the operations further comprise:

aggregating the measurement information and the delay error offset information for the location over a defined period of time.

20. The non-transitory machine-readable storage medium of claim 13, wherein the operations further comprise:

associating the delay error offset information with the location associated with the device pair.