Handover and reselection searching using predictive mobility

• US 9,474,000 B2
• Filed: 03/14/2014
• Issued: 10/18/2016
• Est. Priority Date: 07/31/2013
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Kilpatrick, Thomas II, Quick, Roy Franklin Jr., Awoniyi-Oteri, Olufunmilola
• Primary Examiner(s): Khirodhar, Maharishi
• Application Number:
  US14/211,249
• Publication Number:
  US 20150036663A1
• Time in Patent Office: 949 Days
• US Class Current: 1/1
• CPC Class Codes: H04W 36/00835 Determination of neighbour cell lists
• CPC Class Codes: H04W 36/00837 Determination of triggering parameters for hand-off
• CPC Class Codes: H04W 36/008375 based on historical data
• CPC Class Codes: H04W 36/0085 Hand-off measurements

Abstract

Methods, systems, and devices are described for managing wireless communications. In the methods, systems, and devices, historical information associated with mobility patterns of a mobile device may be accessed. A mobility parameter may be modified for at least one neighboring cell of a set of neighboring cells for measurement by the mobile device. The mobility parameter may be modified based on the historical information associated with the mobility patterns of the mobile device.

Claims

1. A method for managing wireless communications, comprising:

accessing, by a mobile device, historical information associated with mobility patterns of the mobile device, wherein the mobility patterns of the mobile device comprise a route previously travelled by the mobile device;

predicting, by the mobile device, a behavior of the mobile device based on the historical information associated with the mobility patterns of the mobile device;

determining, by the mobile device, that a measured signal strength of a serving cell of the mobile device has dropped below a predetermined value;

modifying, by the mobile device, a mobility parameter for at least one neighboring cell of a set of neighboring cells for measurement by the mobile device based on the predicted behavior of the mobile device; and

refraining from performing a handover or cell reselection of the mobile device from the serving cell to the at least one neighboring cell based on the modified mobility parameter.

2. The method of claim 1, wherein the mobility parameter comprises a handover or reselection threshold associated with the at least one neighboring cell;

and wherein modifying the mobility parameter comprises adjusting a value of the handover or reselection threshold.

3. The method of claim 2, wherein modifying the mobility parameter further comprises:

setting different handover or reselection thresholds for different ones of the neighboring cells.

4. The method of claim 1, wherein the mobility parameter comprises a search window size associated with a handover or a reselection;

and wherein modifying the mobility parameter comprises adjusting the search window size.

5. The method of claim 1, wherein the mobility parameter comprises a timing associated with the at least one neighboring cell;

and wherein modifying the mobility parameter comprises adjusting the timing associated with the at least one neighboring cell.

6. The method of claim 1, wherein the mobility parameter comprises a cell tracking area parameter, and wherein modifying the mobility parameter comprises restricting the measurement of the neighboring cells to a subset of a set of cell tracking areas associated with the neighboring cells.

7. The method of claim 1, further comprising:

selecting the at least one neighboring cell for measurement based on the modified mobility parameter.

8. The method of claim 1, further comprising:

receiving the historical information from a server, the historical information comprising a mobility parameter history for at least one serving cell of the mobile device.

9. The method of claim 1, wherein the historical information comprises a mobility parameter history for the neighboring cells of the mobile device.

10. The method of claim 1, further comprising:

collecting and storing the historical information at the mobile device over a predetermined period of time.

11. The method of claim 1, further comprising:

performing a handover or cell reselection of the mobile device to the at least one neighboring cell based on the modified mobility parameter.

12. An apparatus for managing wireless communications, comprising:

a processor; and

a memory in electronic communication with the processor, the memory embodying instructions, the instructions being executable by the processor to;

access, by a mobile device, historical information associated with mobility patterns of the mobile device, wherein the mobility patterns of the mobile device comprise a route previously travelled by the mobile device;

predict, by the mobile device, a behavior of the mobile device based on the historical information associated with the mobility patterns of the mobile device;

determine, by the mobile device, that a measured signal strength of a serving cell of the mobile device has dropped below a predetermined value;

modify, by the mobile device, a mobility parameter for at least one neighboring cell of a set of neighboring cells for measurement by the mobile device based on the predicted behavior of the mobile device; and

refrain from performing a handover or cell reselection of the mobile device from the serving cell to the at least one neighboring cell based on the modified mobility parameter.

13. The apparatus of claim 12, wherein the mobility parameter comprises a handover or reselection threshold associated with the at least one neighboring cell;

and wherein the instructions to modify the mobility parameter comprise instructions executable to adjust a value of the handover or reselection threshold.

14. The apparatus of claim 13, wherein the instructions to modify the mobility parameter comprise instructions executable to:

set different handover or reselection thresholds for different ones of the neighboring cells.

15. The apparatus of claim 12, wherein the mobility parameter comprises a search window size associated with a handover or a reselection;

and wherein the instructions to modify the mobility parameter comprise instructions executable to adjust the search window size.

16. The apparatus of claim 12, wherein the mobility parameter comprises a timing associated with the at least one neighboring cell;

and wherein the instructions to modify the mobility parameter comprise instructions executable to adjust the timing associated with the at least one neighboring cell.

17. The apparatus of claim 12, wherein the mobility parameter comprises a cell tracking area parameter, and wherein the instructions to modify the mobility parameter comprise instructions executable to restrict the measurement of the neighboring cells to a subset of a set of cell tracking areas associated with the neighboring cells.

18. The apparatus of claim 12, further comprising instructions executable to:

select the at least one neighboring cell for measurement based on the modified mobility parameter.

19. The apparatus of claim 12, further comprising instructions executable to:

receive the historical information from a server, the historical information comprising a mobility parameter history for at least one serving cell of the mobile device.

20. The apparatus of claim 12, wherein the historical information comprises a mobility parameter history for the neighboring cells of the mobile device.

21. The apparatus of claim 12, further comprising instructions executable to:

collect and store the historical information at the mobile device over a predetermined period of time.

22. The apparatus of claim 12, further comprising instructions executable to:

perform a handover or cell reselection of the mobile device to the at least one neighboring cell based on the modified mobility parameter.

23. An apparatus for managing wireless communications, comprising:

means for accessing, by a mobile device, historical information associated with mobility patterns of the mobile device, wherein the mobility patterns of the mobile device comprise a route previously travelled by the mobile device;

means for predicting, by the mobile device, a behavior of the mobile device based on the historical information associated with the mobility patterns of the mobile device;

means for determining, by the mobile device, that a measured signal strength of a serving cell of the mobile device has dropped below a predetermined value;

means for modifying, by the mobile device, a mobility parameter for at least one neighboring cell of a set of neighboring cells for measurement by the mobile device based on the predicted behavior of the mobile device; and

means for refraining from performing a handover or cell reselection of the mobile device from the serving cell to the at least one neighboring cell based on the modified mobility parameter.

24. The apparatus of claim 23, wherein the mobility parameter comprises a handover or reselection threshold associated with the at least one neighboring cell;

and wherein the means for modifying the mobility parameter comprises means for adjusting a value of the handover or reselection threshold.

25. The apparatus of claim 23, wherein the mobility parameter comprises a cell tracking area parameter, and wherein the means for modifying the mobility parameter comprises means for restricting the measurement of the neighboring cells to a subset of a set of cell tracking areas associated with the neighboring cells.

26. A computer program product for managing wireless communications, the computer program product comprising a non-transitory computer-readable storage medium comprising instructions executable by a processor to:

access, by a mobile device, historical information associated with mobility patterns of the mobile device, wherein the mobility patterns of the mobile device comprise a route previously travelled by the mobile device;

predict, by the mobile device, a behavior of the mobile device based on the historical information associated with the mobility patterns of the mobile device;

determine, by the mobile device, that a measured signal strength of a serving cell of the mobile device has dropped below a predetermined value;

modify, by the mobile device, a mobility parameter for at least one neighboring cell of a set of neighboring cells for measurement by the mobile device based on the predicted behavior of the mobile device; and

refrain from performing a handover or cell reselection of the mobile device from the serving cell to the at least one neighboring cell based on the modified mobility parameter.