Mobility based power conservation

• US 9,462,553 B2
• Filed: 10/27/2014
• Issued: 10/04/2016
• Est. Priority Date: 10/27/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Bolotski, Josephine, Gopal, Thawatt, Zhou, Ping, Jin, Chao, Wang, Shanshan, Kang, Insung, Chin, Tom
• Primary Examiner(s): TRAN, PHUC H
• Application Number:
  US14/524,975
• Publication Number:
  US 20160119876A1
• Time in Patent Office: 708 Days
• US Class Current: 1/1
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 36/00835 Determination of neighbour cell lists
• CPC Class Codes: H04W 36/0085 Hand-off measurements
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 36/04 Reselecting a cell layer in multi-layered cells
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 52/0251 using monitoring of local events, e.g. events related to user activity
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A user equipment (UE) prioritizes searches and/or measurements of neighbor cells/frequencies based on a level of mobility of a UE. In one instance, the UE identifies a priority of a layer of a radio access technology (RAT) to be measured or searched and identifies a level of mobility of the UE. A sensor module of the UE may determine the level of mobility of the UE and generate an indication corresponding to the level of mobility of the UE. The UE prioritizes a periodicity of interlayer search and/or measurement based on the priority of the layer to be measured and the level of the mobility of the UE.

Claims

1. A method of wireless communication, comprising:

setting a priority of a layer relative to other layers based at least in part on a current call type and radio access technology (RAT) type while a user equipment (UE) is in an idle mode or in a connected mode; and

prioritizing a periodicity of interlayer search and/or measurement based at least in part on the priority of the layer to be measured and a level of UE mobility.

2. The method of claim 1, further comprising determining the periodicity of the interlayer search and/or the periodicity of the interlayer measurement independently.

3. The method of claim 2, in which the independently determining comprises adjusting the periodicity of the interlayer search by a first multiplication factor based at least in part on the level of the UE mobility and adjusting the periodicity of the interlayer measurement by a second multiplication factor based at least in part on the level of the UE mobility.

4. The method of claim 1, in which the prioritizing comprises applying a multiplication factor to the periodicity.

5. The method of claim 1, further comprising stopping measurement of a low priority layer when the UE is in the idle mode.

6. The method of claim 1, further comprising stopping measurement of a low priority layer.

7. The method of claim 1, further comprising powering off radio frequency (RF) circuitry during network measurement gaps for a low priority layer.

8. The method of claim 1, in which the prioritizing is further based at least in part on a serving cell signal strength and/or quality.

9. The method of claim 1, in which the level of the UE mobility is determined by a motion sensor.

10. An apparatus for wireless communication, comprising:

means for setting a priority of a layer relative to other layers based at least in part on a current call type and radio access technology (RAT) type while a user equipment (UE) is in an idle mode or in a connected mode;

means for identifying the priority of the layer to be measured and a level of UE mobility; and

means for prioritizing a periodicity of interlayer search and/or measurement based at least in part on the priority of the layer to be measured and the level of the UE mobility.

11. The apparatus of claim 10, further comprising means for determining the periodicity of the interlayer search and/or the periodicity of the interlayer measurement independently.

12. The apparatus of claim 11, in which the determining means comprises means for adjusting the periodicity of the interlayer search by a first multiplication factor based at least in part on the level of the UE mobility and means for adjusting the periodicity of the interlayer measurement by a second multiplication factor based at least in part on the level of the UE mobility.

13. An apparatus for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory and configured;

to set a priority of a layer relative to other layers based at least in part on a current call type and radio access technology (RAT) type while the UE is in an idle mode or a connected mode; and

to prioritize a periodicity of interlayer search and/or measurement based at least in part on the priority of the layer to be measured and a level of UE mobility.

14. The apparatus of claim 13, in which the at least one processor is further configured to determine the periodicity of the interlayer search and/or the periodicity of the interlayer measurement independently.

15. The apparatus of claim 14, in which the at least one processor is further configured to independently determine by adjusting the periodicity of the interlayer search by a first multiplication factor based at least in part on the level of the UE mobility and by adjusting the periodicity of the interlayer measurement by a second multiplication factor based at least in part on the level of UE mobility.

16. The apparatus of claim 13, in which the at least one processor is further configured to prioritize by applying a multiplication factor to the periodicity.

17. The apparatus of claim 13, in which the at least one processor is further configured to stop measurement of a low priority layer when the UE is in the idle mode.

18. The apparatus of claim 13, in which the at least one processor is further configured to stop measurement of a low priority layer.

19. The apparatus of claim 13, in which the at least one processor is further configured to power off radio frequency (RF) circuitry during network measurement gaps for a low priority layer.

20. The apparatus of claim 13, in which the at least one processor is further configured to prioritize based at least in part on a serving cell signal strength and/or quality.

21. The apparatus of claim 13, in which the level of the UE mobility is determined by a motion sensor.

22. A computer program product for wireless communication, comprising:

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

program code to set a priority of a layer to other layers based at least in part on a current call type and radio access technology (RAT) type while the UE is in an idle mode or a connected mode; and

program code to prioritize a periodicity of interlayer search and/or measurement based at least in part on the priority of a layer to be measured and a level of UE mobility.

23. The computer program product of claim 22, further comprising program code to determine the periodicity of the interlayer search and/or the periodicity of the interlayer measurement independently.

24. The computer program product of claim 23, in which the program code to determine further comprises program code to adjust the periodicity of the interlayer search by a first multiplication factor based at least in part on the level of the UE mobility and program code to adjust the periodicity of the interlayer measurement by a second multiplication factor based at least in part on the level of UE mobility.