Adaptive calibration of measurements for a wireless radio network

• US 8,929,827 B2
• Filed: 06/04/2012
• Issued: 01/06/2015
• Est. Priority Date: 06/04/2012
• Status: Expired due to Fees

• Current Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Original Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Inventors: Fix, Jeremy, Martinez, Francisco, Meredith, Sheldon Kent
• Primary Examiner(s): Georgewill, Opiribo
• Application Number:
  US13/488,144
• Publication Number:
  US 20130324149A1
• Time in Patent Office: 946 Days
• Field of Search: 455/41.2, 455/456.1, 455/63.1, 370/252, 370/328, 370/241
• US Class Current: 455/63.1
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

Adaptive calibration of measurements for a wireless radio network is described. A network location system can employ timed fingerprint location technology to determine location information for UEs in a NELOS enabled wireless network environment. Calibration of observed time measurements can reduce errors in determining location information. Adaptive calibration facilitates the selection of subsets of wireless network radios for calibration updates. The selection of wireless network radios comprising the subsets can be based on prioritization rules including prioritization based on historical calibration information, geographic information, or observation density information for a wireless network radio. Further, a wireless network radio can be deprioritized based on the availability of alternate location information related to the wireless network radio.

Claims

1. A system, comprising:

a memory to store executable instructions; and

a processor, coupled to the memory, that facilitates execution of the executable instructions to perform operations, comprising;

determining calibration update information related to a time measurement for a radio link between a wireless network radio and a user equipment based at least in part on radio information and alternate location information, wherein the alternate location information comprises location information determined from non-timed fingerprint location technologies; and

determining a set of calibration candidates, wherein the set of calibration candidates comprises a radio identification for a calibration candidate of the set of calibration candidates and a calibration score associated with the radio identification, and wherein the calibration score is employable to rank, by calibration priority, the calibration candidate in relation to the wireless network radio.

2. The system of claim 1, wherein the time measurement is an observed time difference measurement.

3. The system of claim 1, wherein the radio information includes an observed time measurement comprising a propagation time for the radio link and a radio delay time.

4. The system of claim 1, wherein the alternate location information includes location information determined from a global positioning system technology.

5. The system of claim 1, wherein the alternate location information includes location information determined from user equipment interaction with objects having a known location.

6. The system of claim 1, wherein the calibration score is based on historical calibration information associated with the calibration candidate.

7. The system of claim 6, wherein the historical calibration information is a historical calibration status.

8. The system of claim 6, wherein the historical calibration information is based on a time of a historical calibration of the calibration candidate.

9. The system of claim 1, wherein the calibration score is based on geographic information associated with the calibration candidate.

10. The system of claim 9, wherein the geographic information is a value correlating to overlap between an area of radio coverage for the calibration candidate and another wireless network radio other than the wireless network radio.

11. The system of claim 1, wherein the calibration score is based on observation density information including a frequency of interaction for the calibration candidate with another user equipment of the wireless network, and the observation density information is associated with the calibration candidate.

12. The system of claim 1, wherein the operations further comprise deprioritizing the wireless network radio from a current priority based on a determination that the alternate location information is compromised.

13. The system of claim 12, wherein the determination that the alternate location information is compromised is based on a probability that the alternate location information will be incomplete or unavailable for the wireless network radio.

14. A method, comprising:

receiving, by a system including a processor, radio information and alternate location information;

determining, by the system, calibration update information related to a time measurement for a radio link between a wireless network radio and a user equipment based at least in part on the radio information and the alternate location information, wherein the alternate location information comprises location information determined from non-timed fingerprint location technologies; and

determining a set of calibration candidates, wherein the set of calibration candidates comprises a radio identification for a calibration candidate of the set of calibration candidates and a calibration score associated with the radio identification, and wherein the calibration score is employable to rank, by calibration priority, the calibration candidate in relation to the wireless network radio.

15. The method of claim 14, wherein the determining includes determining the calibration update information related to an observed time difference measurement, and the radio information comprises an observed time measurement comprising a propagation time for the radio link and a radio delay time.

16. The method of claim 14, wherein the determining the set of calibration candidates comprises receiving the calibration score, the calibration score is based on observation density information comprising a frequency of interaction for the calibration candidate with another user equipment of the wireless network, and the observation density information is associated with the calibration candidate.

17. The method of claim 14, wherein the determining the set of calibration candidates is based on historical calibration information associated with the calibration candidate, geographic information associated with the calibration candidate, and observation density information associated with the calibration candidate.

18. A mobile device, comprising:

a memory to store executable instructions; and

a processor, coupled to the memory, that facilitates execution of the executable instructions to perform operations, comprising;

determining calibration update information related to a time measurement for a radio link between a wireless network radio and a user equipment based at least in part on radio information and alternate location information, wherein the alternate location information comprises location information determined from non-timed fingerprint location technologies; and

determining a set of calibration candidates, wherein the set of calibration candidates includes a radio identification for a calibration candidate of the set of calibration candidates and a calibration score associated with the radio identification, wherein the calibration score is employable to rank, by calibration priority, the calibration candidate in relation to the wireless network radio.

19. The mobile device of claim 18, wherein the calibration score is based on observation density information comprising a frequency of interaction for the calibration candidate with another user equipment of the wireless network, and the observation density information is associated with the calibration candidate.

20. The mobile device of claim 18, wherein the determining the set of calibration candidates is based on historical calibration information associated with the calibration candidate, geographic information associated with the calibration candidate, and observation density information associated with the calibration candidate.