Methods, Wireless Device and Network Node for Managing Positioning Method Based on Prediction

• US 20160219409A1
• Filed: 10/25/2013
• Published: 07/28/2016
• Est. Priority Date: 09/13/2013
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Cai, Xuejun, CHRISTOFFERSSON, Jan, ZHANG, Shunliang, HUANG, Vincent
• Granted Patent: US 9,749,805 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01S 19/48 by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 64/006 with additional information processing, e.g. for direction or speed determination

Abstract

A method and a wireless device (110) for managing a positioning method based on prediction as well as a method and a network node (120) for managing mobility patterns for use by a wireless device (110) when performing a positioning method based on prediction are disclosed. The wireless device (110) performs mobility measurements relating to mobility of the wireless device (110). The wireless device (110) estimates a position of the wireless device (110) based on prediction by using the mobility measurements and a first intra-cell pattern. The wireless device (110) detects whether the wireless device (110) is on the first intra-cell pattern or on a second intra-cell pattern, when the estimated position has reached a checkpoint of the first intra-cell pattern. The network node (120) receives information about mobility patterns. The mobility patterns comprise intra-cell patterns of cells visited by the wireless device (110). The network node (120) identifies one or more checkpoints by finding a junction between at least two of the intra-cell patterns.

Claims

1. The method, performed by a wireless device, for managing a positioning method based on prediction, wherein the method comprises:

performing mobility measurements relating to mobility of the wireless device;

estimating a position of the wireless device based on prediction by using the mobility measurements and a first intra-cell pattern, which first intra-cell pattern indicates positions within a cell, wherein the wireless device is associated with the cell; and

when the estimated position has reached a checkpoint of the first intra-cell pattern, wherein the checkpoint identifies a junction between the first intra-cell pattern and a second intra-cell pattern for indicating positions within the cell, detecting whether the wireless device is on the first intra-cell pattern or on the second intra-cell pattern.

2. The method according to claim 1, wherein the performing of mobility measurements is performed by one or more mobility sensors and/or measurement of time elapsed since a preceding position estimation.

3. The method according to claim 1, wherein the detecting is performed by means of GPS measurements.

4. The method according to claim 1, wherein the detecting is performed by means of mobility measurements performed by one or more mobility sensors.

5. The method according to claim 1, wherein the wireless device follows an inter-cell pattern, which comprises a source cell, wherein the method further comprises:

when the wireless device enters a target cell from the source cell, checking the inter-cell pattern by comparing a first cell identifier of the target cell to a second cell identifier for a predicted subsequent cell according to the inter-cell pattern.

6. The method according to claim 5, wherein the method further comprises:

selecting the intra-cell pattern based on the source cell and a further source cell, which was visited, by the wireless device, prior to the source cell.

7. The method according to claim 1, wherein the method further comprises:

collecting mobility patterns of the wireless device by identifying inter-cell patterns and intra-cell patterns, wherein the mobility patterns comprise the inter-cell patterns and the intra-cell patterns.

8. The method according to claim 7, wherein the method further comprises

analysing the collected mobility patterns to identify one or more checkpoints by finding one or more junctions among the intra-cell patterns.

9. The method according to claim 7, wherein the method further comprises:

updating the mobility pattern by adding the collected mobility patterns to a database comprising mobility patterns.

10. The method according to claim 7, wherein the method further comprises:

sending the collected mobility patterns to the network node.

11. A method, performed by a network node, for managing mobility patterns for use by a wireless device when performing a positioning method based on prediction, wherein the method comprises:

receiving information about mobility patterns, wherein the mobility patterns comprise intra-cell patterns of cells visited by the wireless device; and

analyzing the mobility patterns according to the received information about mobility pattern, wherein the analyzing comprises identifying one or more checkpoints by finding a junction between at least two of the intra-cell patterns.

12. The method according to claim 11, wherein the method further comprises:

storing the mobility pattern, including the identified checkpoints, in a database.

13. A wireless device configured to manage a positioning method based on prediction, wherein the wireless device comprises a processing circuit configured to:

perform mobility measurements relating to mobility of the wireless device;

estimate a position of the wireless device based on prediction by using the mobility measurements and a first intra-cell pattern, which first intra-cell pattern indicates positions within a cell, wherein the wireless device is associated with the cell; and

when the estimated position has reached a checkpoint of the first intra-cell pattern, wherein the checkpoint identifies a junction between the first intra-cell pattern and a second intra-cell pattern for indicating positions within the cell, detect whether the wireless device is on the first intra-cell pattern or on the second intra-cell pattern.

14. The wireless device according to claim 13, wherein the processing circuit is configured to perform the mobility measurements by one or more mobility sensors and/or measurement of time elapsed since a preceding position estimation.

15. The wireless device according to claim 13, wherein the processing circuit is configured to detect by means of GPS measurements.

16. The wireless device according to claim 13, wherein the processing circuit is configured to detect by means of mobility measurements performed by one or more mobility sensors.

17. The wireless device according to claim 13, wherein the wireless device follows an inter-cell pattern, which comprises a source cell, wherein the processing circuit is configured to check the inter-cell pattern by comparing a first cell identifier of the target cell to a second cell identifier for a predicted subsequent cell according to the inter-cell pattern, when the wireless device enters a target cell from the source cell.

18. The wireless device according to claim 17, wherein the processing circuit is configured to select the intra-cell pattern based on the source cell and a further source cell, which was visited, by the wireless device, prior to the source cell.

19. The wireless device according to claim 13, wherein the processing circuit is configured to collect mobility patterns of the wireless device by identifying inter-cell patterns and intra-cell patterns, wherein the mobility patterns comprise the inter-cell patterns and the intra-cell patterns.

20. The wireless device according to claim 19, wherein the processing circuit is configured to analyse the collected mobility patterns to identify one or more checkpoints by finding one or more junctions among the intra-cell patterns.

21. The wireless device according to claim 19, wherein the processing circuit is configured to update the mobility pattern by adding the collected mobility patterns to a database comprising mobility patterns.

22. The wireless device according to claim 19, wherein the processing circuit is configured to send the collected mobility patterns to the network node.

23. A network node configured to manage mobility patterns for use by a wireless device when performing a positioning method based on prediction, wherein the network node comprises a processing circuit configured to:

receive information about mobility patterns, wherein the mobility patterns comprise intra-cell patterns of cells visited by the wireless device; and

analyze the mobility pattern according to the received information about mobility pattern, wherein the analyzing comprises identifying one or more checkpoints by finding a junction between at least two the intra-cell patterns.

24. The network node according to claim 23, wherein the processing circuit is configured to store the mobility pattern, including the identified checkpoints, in a database.