METHOD AND APPARATUS FOR IMPROVED RESELECTION DURING MODE TRANSITIONS

• US 20140256327A1
• Filed: 10/08/2013
• Published: 09/11/2014
• Est. Priority Date: 03/11/2013
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: WANG, Fan, TAMBARAM KAILASAM, Sundaresan, HU, An-Swol Clement, KHAN, Uzma
• Granted Patent: US 9,749,946 B2
• Time in Patent Office: Days
• US Class Current: 455/437
• CPC Class Codes: H04W 36/0083 Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
• CPC Class Codes: H04W 36/00837 Determination of triggering parameters for hand-off
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/20 Selecting an access point

Abstract

The present disclosure presents a method and apparatus for improved reselection during mode transitions at a user equipment (UE). For example, the disclosure presents a method for identifying that a user equipment (UE) has started switching from a first priority scheduling mode to a second priority scheduling mode while making measurements for reselection. In addition, such an example method, may include initiating a mode transition timer in response to the identification and triggering a search for one or more frequencies of the second priority scheduling mode upon expiration of the mode transition timer. As such, an improved reselection during mode transitions at UE may be achieved.

Claims

1. A method for improved reselection during mode transitions at a user equipment (UE), comprising:

identifying that a user equipment (UE) has started switching from a first priority scheduling mode to a second priority scheduling mode while making measurements for reselection;

initiating a mode transition timer in response to the identification; and

triggering a search for one or more frequencies of the second priority scheduling mode upon expiration of the mode transition timer.

2. The method of claim 1, wherein the switching comprises:

switching from an all priority scheduling mode to a high priority scheduling mode or from a high priority scheduling mode to an all priority scheduling mode.

3. The method of claim 1, wherein the mode transition timer is set to a value between zero and T_higher—

<sub>priority—

search</sub> when switching from the all priority scheduling mode to the high priority scheduling mode.

4. The method of claim 1, wherein the mode transition timer is set to a value between zero and K_carrier*T_detect-UTRA when switching from the high priority scheduling mode to the all priority scheduling mode.

5. The method of claim 1, further comprising:

performing a reselection to a frequency of the second priority scheduling mode.

6. The method of claim 1, wherein the switching is initiated at least based on changes in signal quality of a serving cell of UE or mobility of the UE.

7. An apparatus for improved reselection during mode transitions at a user equipment (UE), comprising:

means for identifying that a user equipment (UE) has started switching from a first priority scheduling mode to a second priority scheduling mode while making measurements for reselection;

means for initiating a mode transition timer in response to the identification; and

means for triggering a search for one or more frequencies of the second priority scheduling mode upon expiration of the mode transition timer.

8. The apparatus of claim 7, wherein the means for identifying is further configured to comprise means for switching from an all priority scheduling mode to a high priority scheduling mode or from a high priority scheduling mode to an all priority scheduling mode.

9. The apparatus of claim 7, wherein the means for initiating is further configured to set the mode transition timer to a value between zero and T_higher—

<sub>priority—

search</sub> when switching from the all priority scheduling mode to the high priority scheduling mode.

10. The apparatus of claim 7, wherein the means for initiating is further configured to set the mode transition timer to a value between zero and K_carrier*T_detect-UTRA when switching from the high priority scheduling mode to the all priority scheduling mode.

11. The apparatus of claim 7, further comprising:

means for performing a reselection to a frequency of the second priority scheduling mode.

12. The apparatus of claim 7, wherein the means for identifying is further configured to initiate the switching at least based on changes in signal quality of a serving cell of UE or mobility of the UE.

13. A computer program product for improved reselection during mode transitions, comprising:

a computer-readable medium comprising code executable by a computer for;

identifying that a user equipment (UE) has started switching from a first priority scheduling mode to a second priority scheduling mode while making measurements for reselection;

initiating a mode transition timer in response to the identification; and

triggering a search for one or more frequencies of the second priority scheduling mode upon expiration of the mode transition timer.

14. The computer program product of claim 13, wherein code for identifying is further configured to switch from an all priority scheduling mode to a high priority scheduling mode or from a high priority scheduling mode to an all priority scheduling mode.

15. The computer program product of claim 13, wherein code for initiating is further configured to set the mode transition timer to a value between zero and T_higher—

<sub>priority—

search</sub> when switching from the all priority scheduling mode to the high priority scheduling mode.

16. The computer program product of claim 13, wherein code for initiating is further configured to set the mode transition timer to a value between zero and K_carrier* T_detect-UTRA when switching from the high priority scheduling mode to the all priority scheduling mode.

17. The computer program product of claim 13, further comprising:

code for performing a reselection to a frequency of the second priority scheduling mode.

18. The computer program product of claim 13, wherein the switching is initiated at least based on changes in signal quality of a serving cell of UE or mobility of the UE.

19. Arm apparatus for improved reselection during mode transitions at a user equipment (UE), comprising:

a mode switching component to identify that a user equipment (UE) has started switching from a first priority scheduling mode to a second priority scheduling mode while making measurements for reselection;

a mode transition timer initiating component to initiate a mode transition timer in response to the identification; and

a frequency search triggering component to trigger a search for one or more frequencies of the second priority scheduling mode upon expiration of the mode transition timer.

20. The apparatus of claim 19, wherein the mode switching component is further configured to switch from an all priority scheduling mode to a high priority scheduling mode or from a high priority scheduling mode to an all priority scheduling mode.

21. The apparatus of claim 19, wherein mode transition timer initiating component is further configured to set the mode transition timer to a value between zero and T_higher—

<sub>priority—

search</sub> when switching from the all priority scheduling mode to the high priority scheduling mode.

22. The apparatus of claim 19, wherein mode transition timer initiating component is further configured to set the mode transition timer to a value between zero and K_carrier*T_detect-UTRA when switching from the high priority scheduling mode to the all priority scheduling mode.

23. The apparatus of claim 19, further comprising:

a reselection component to perform a reselection to a frequency of the second priority scheduling mode.

24. The apparatus of claim 19, mode switching component is further configured to initiate the switching at least based on changes in signal quality of a serving cell of UE or mobility of the UE.