Optimizing UE wakeup timeline in connected mode DRX based on CQI reporting schedule in a wireless communication system
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.
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, based on the determination, a wake-up time to enable processing of downlink information and transmission of the CQI,
wherein the scheduling the wake-up time is further based on a number of subframes required to generate a CQI report and an offset between a first subframe of an on-duration and a subframe in which the CQI is determined to be transmitted, and
wherein the wake-up time is scheduled prior to the first subframe of the on-duration when the number of subframes required to generate the CQI report is greater than the offset between the first subframe of the on-duration and the subframe in which the CQI is determined to be transmitted.
2. The method of claim 1 , wherein the scheduling the wake-up time comprises:
scheduling to wake to enable processing of the downlink information at the first subframe of the 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 the on-duration when the CQI is determined to be reported periodically,
wherein the on-duration is adoration 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 the 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 the 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 the 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, based on the determination, a wake-up time to enable processing of downlink information and transmission of the CQI,
wherein the means for scheduling is configured to schedule the wake-up time based on a number of subframes required to generate a CQI report and an offset between a first subframe of an on-duration and a subframe in which the CQI is determined to be transmitted, and
wherein the wake-up time is scheduled prior to the first subframe of the on-duration when the number of subframes required to generate the CQI report is greater than the offset between the first subframe of the on-duration and the subframe in which the CQI is determined to be transmitted.
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 the downlink information at the first subframe of the 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 means for scheduling the wake-up time is configured Co:
determine whether the CQI is to be transmitted during any one of x subframes immediately after a start of the 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 the 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 the 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 the 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 memory; and
at least one processor coupled to the memory and 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, based on the determination, a wake-up time to enable processing of downlink information and transmission of the CQI,
wherein the at least one processor is configured to schedule the wake-up time further based on a number of subframes required to generate a CQI report and an offset between a first subframe of an on-duration and a subframe in which the CQI is determined to be transmitted, and
wherein the wake-up time is scheduled prior to the first subframe of the on-duration when the number of subframes required to generate the CQI report is greater than the offset between the first subframe of the on-duration and the subframe in which the CQI is determined to be transmitted.
14. The apparatus of claim 13 , wherein the at least one processor coupled to the memory is further configured to:
schedule to wake to enable processing of the downlink information at the first subframe of the 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 at least one processor coupled to the memory is further configured to:
determine whether the CQI is to be transmitted during any one of x subframes immediately after a start of the 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 at least one processor coupled to the memory 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 the 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 at least one processor coupled to the memory is further configured to:
schedule to wake to enable processing of downlink information at the first subframe of the on-duration when y is greater than or equal to x.
18. The apparatus of claim 15 , wherein the at least one processor coupled to the memory is further configured to:
schedule to wake to enable processing of downlink information at the 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 non-transitory computer-readable medium storing code that when executed on at least one processor causes the at least one processor 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, based on the determination, a wake-up time to enable processing of downlink information and transmission of the CQI,
wherein the code for scheduling the wake-up time is configured to schedule the wakeup time further based on a number of subframes required to generate a CQI report and an offset between a first subframe of an on-duration and a subframe in which the CQI is determined to be transmitted, and
wherein the wake-up time is scheduled prior to the first subframe of the on-duration when the number of subframes required to generate the CQI report is greater than the offset between the first subframe of the on-duration and the subframe in which the CQI is determined to be transmitted.
20. The non-transitory computer-readable medium of claim 19 , wherein the code for scheduling the wake-up time is configured to:
schedule to wake to enable processing of the downlink information at the first subframe of the 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 non-transitory computer-readable medium 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 the on-duration when the CQI is determined to be reported periodically,
wherein the on-duration is adoration 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 non-transitory computer-readable medium 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 the 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 non-transitory computer-readable medium 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 the first subframe of the on-duration when y is greater than or equal to x.
24. The non-transitory computer-readable medium 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 the 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.