OPTIMIZING UE WAKEUP TIMELINE IN CONNECTED MODE DRX BASED ON CQI REPORTING SCHEDULE IN A WIRELESS COMMUNICATION SYSTEM

• US 20130194990A1
• Filed: 09/14/2012
• Published: 08/01/2013
• Est. Priority Date: 01/30/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Banister, Brian Clarke, Mahmoud, Hisham A.
• Granted Patent: US 9,357,416 B2
• Time in Patent Office: Days
• US Class Current: 370/311
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method, an apparatus, and a computer program product for wireless communication are provided in which channel quality indicator (CQI) requirements for reporting a CQI are received, whether the CQI is to be reported periodically is determined based on the CQI requirements, and a wake-up time based on the determination is scheduled. CQI reporting requirements, such as CQI scheduling information may be used to plan a UE discontinuous reception (DRX) wake-up time and adaptively shorten a duration the UE is awake when transmission of a CQI report is not required at a first subframe of a DRX on-duration. The shorter UE awake duration results in reduced power consumption.

Claims

1. A method of wireless communication, comprising:

receiving channel quality indicator (CQI) requirements for reporting a CQI;

determining whether the CQI is to be reported periodically based on the CQI requirements; and

scheduling a wake-up time based on the determination.

2. The method of claim 1, wherein the scheduling the wake-up time comprises:

scheduling to wake to enable processing of downlink information at a first subframe of an on-duration when the CQI is determined not to be reported periodically, wherein the on-duration is a duration over which a downlink control channel is monitored every discontinuous reception (DRX) cycle.

3. The method of claim 1, wherein the scheduling the wake-up time comprises:

determining whether the CQI is to be transmitted during any one of x subframes immediately after a start of an on-duration when the CQI is determined to be reported periodically,

wherein the on-duration is a duration over which a downlink control channel is monitored every discontinuous reception (DRX) cycle, and

wherein x is a number of subframes required to generate a CQI report.

4. The method of claim 3, wherein the scheduling the wake-up time further comprises:

scheduling to wake to enable processing of downlink information at a subframe that is x−

y subframes immediately before the start of the on-duration when the CQI is determined to be transmitted during any one of the x subframes immediately after the start of the on-duration,

wherein y is an offset between a first subframe of the on-duration and one of the x subframes at which the CQI is to be transmitted, and

wherein y is less than x.

5. The method of claim 4, wherein the scheduling the wake-up time further comprises:

scheduling to wake to enable processing of downlink information at a first subframe of the on-duration when y is greater than or equal to x.

6. The method of claim 3, wherein the scheduling the wake-up time further comprises:

scheduling to wake to enable processing of downlink information at a first subframe of the on-duration when the CQI is determined not to be transmitted during any one of the x subframes immediately after the start of the on-duration.

7. An apparatus for wireless communication, comprising:

means for receiving channel quality indicator (CQI) requirements for reporting a CQI;

means for determining whether the CQI is to be reported periodically based on the CQI requirements; and

means for scheduling a wake-up time based on the determination.

8. The apparatus of claim 7, wherein the means for scheduling the wake-up time is configured to:

schedule to wake to enable processing of downlink information at a first subframe of an on-duration when the CQI is determined not to be reported periodically, wherein the on-duration is a duration over which a downlink control channel is monitored every discontinuous reception (DRX) cycle.

9. The apparatus of claim 7, wherein the means for scheduling the wake-up time is configured to:

determine whether the CQI is to be transmitted during any one of x subframes immediately after a start of an on-duration when the CQI is determined to be reported periodically,

wherein the on-duration is a duration over which a downlink control channel is monitored every discontinuous reception (DRX) cycle, and

wherein x is a number of subframes required to generate a CQI report.

10. The apparatus of claim 9, wherein the means for scheduling the wake-up time is further configured to:

schedule to wake to enable processing of downlink information at a subframe that is x−

y subframes immediately before the start of the on-duration when the CQI is determined to be transmitted during any one of the x subframes immediately after the start of the on-duration,

wherein y is an offset between a first subframe of the on-duration and one of the x subframes at which the CQI is to be transmitted, and

wherein y is less than x.

11. The apparatus of claim 10, wherein the means for scheduling the wake-up time is further configured to:

schedule to wake to enable processing of downlink information at a first subframe of the on-duration when y is greater than or equal to x.

12. The apparatus of claim 9, wherein the means for scheduling the wake-up time is further configured to:

schedule to wake to enable processing of downlink information at a first subframe of the on-duration when the CQI is determined not to be transmitted during any one of the x subframes immediately after the start of the on-duration.

13. An apparatus for wireless communication, comprising:

a processing system configured to;

receive channel quality indicator (CQI) requirements for reporting a CQI;

determine whether the CQI is to be reported periodically based on the CQI requirements; and

schedule a wake-up time based on the determination.

14. The apparatus of claim 13, wherein the processing system is further configured to:

schedule to wake to enable processing of downlink information at a first subframe of an on-duration when the CQI is determined not to be reported periodically, wherein the on-duration is a duration over which a downlink control channel is monitored every discontinuous reception (DRX) cycle.

15. The apparatus of claim 13, wherein the processing system is further configured to:

determine whether the CQI is to be transmitted during any one of x subframes immediately after a start of an on-duration when the CQI is determined to be reported periodically,

wherein the on-duration is a duration over which a downlink control channel is monitored every discontinuous reception (DRX) cycle, and

wherein x is a number of subframes required to generate a CQI report.

16. The apparatus of claim 15, wherein the processing system is further configured to:

schedule to wake to enable processing of downlink information at a subframe that is x−

y subframes immediately before the start of the on-duration when the CQI is determined to be transmitted during any one of the x subframes immediately after the start of the on-duration,

wherein y is an offset between a first subframe of the on-duration and one of the x subframes at which the CQI is to be transmitted, and

wherein y is less than x.

17. The apparatus of claim 16, wherein the processing system is further configured to:

schedule to wake to enable processing of downlink information at a first subframe of the on-duration when y is greater than or equal to x.

18. The apparatus of claim 15, wherein the processing system is further configured to:

schedule to wake to enable processing of downlink information at a first subframe of the on-duration when the CQI is determined not to be transmitted during any one of the x subframes immediately after the start of the on-duration.

19. A computer program product, comprising:

a computer-readable medium comprising code for;

receiving channel quality indicator (CQI) requirements for reporting a CQI;

determining whether the CQI is to be reported periodically based on the CQI requirements; and

scheduling a wake-up time based on the determination.

20. The computer program product of claim 19, wherein the code for scheduling the wake-up time is configured to:

schedule to wake to enable processing of downlink information at a first subframe of an on-duration when the CQI is determined not to be reported periodically, wherein the on-duration is a duration over which a downlink control channel is monitored every discontinuous reception (DRX) cycle.

21. The computer program product of claim 19, wherein the code for scheduling the wake-up time is configured to:

determine whether the CQI is to be transmitted during any one of x subframes immediately after a start of an on-duration when the CQI is determined to be reported periodically,

wherein the on-duration is a duration over which a downlink control channel is monitored every discontinuous reception (DRX) cycle, and

wherein x is a number of subframes required to generate a CQI report.

22. The computer program product of claim 21, wherein the code for scheduling the wake-up time is further configured to:

schedule to wake to enable processing of downlink information at a subframe that is x−

y subframes immediately before the start of the on-duration when the CQI is determined to be transmitted during any one of the x subframes immediately after the start of the on-duration,

wherein y is an offset between a first subframe of the on-duration and one of the x subframes at which the CQI is to be transmitted, and

wherein y is less than x.

23. The computer program product of claim 22, wherein the code for scheduling the wake-up time is further configured to:

schedule to wake to enable processing of downlink information at a first subframe of the on-duration when y is greater than or equal to x.

24. The computer program product of claim 21, wherein the code for scheduling the wake-up time is further configured to:

schedule to wake to enable processing of downlink information at a first subframe of the on-duration when the CQI is determined not to be transmitted during any one of the x subframes immediately after the start of the on-duration.