Discontinuous reception techniques with non-uniform cycle durations
Methods, systems, and devices for wireless communications are described for configuring discontinuous reception (DRX) cycles within a DRX time period at a user equipment (UE). DRX configurations may provide that different DRX cycles have non-uniform cycle durations within the DRX time period. Such non-uniform cycle durations may provide DRX ON-durations that are aligned with a periodicity of downlink traffic to the UE in which the downlink traffic may be unaligned with timing boundaries used for wireless communications between the UE and a base station, such as slot boundaries or symbol boundaries.
1. An apparatus for wireless communication at a user equipment (UE), comprising:
one or more processors,
memory coupled with the one or more processors; and
instructions stored in the memory and executable by the one or more processors to cause the apparatus to:
receive an indication of a discontinuous reception cycle configuration comprising an indication of a plurality of discontinuous reception cycles within a discontinuous reception period, the plurality of discontinuous reception cycles determined based at least in part on a non-integer rational number; and
initiate a wakeup procedure for the UE based at least in part on a start time for each ON-duration of the plurality of discontinuous reception cycles within the discontinuous reception period, wherein a timing boundary associated with the start time comprises a timing boundary nearest to the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number, a timing boundary subsequent to the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number, or a timing boundary preceding the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number.
2. The apparatus of claim 1 , wherein the timing boundary is a slot boundary or a symbol boundary.
3. The apparatus of claim 1 , wherein the instructions are further executable by the one or more processors to cause the apparatus to:
initiate a discontinuous reception cycle inactivity timer based at least in part on an absolute time relative to the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number or the start time for each ON-duration of the plurality of discontinuous reception cycles to align with the timing boundary.
4. The apparatus of claim 1 , wherein the instructions are further executable by the one or more processors to cause the apparatus to:
receive the indication of the discontinuous reception cycle configuration via radio resource control signaling.
5. The apparatus of claim 1 , wherein the instructions are further executable by the one or more processors to cause the apparatus to:
receive the indication of the discontinuous reception cycle configuration via one or more of downlink control information or a medium access control (MAC) control element (CE).
6. An apparatus for wireless communication at a network entity, comprising:
one or more processors,
memory coupled with the one or more processors; and
instructions stored in the memory and executable by the one or more processors to cause the apparatus to:
identify a traffic periodicity associated with wireless communications traffic to a user equipment (UE); and
transmit, based at least in part on the traffic periodicity, an indication of a discontinuous reception cycle configuration comprising an indication of a plurality of discontinuous reception cycles within a discontinuous reception period, the plurality of discontinuous reception cycles determined based at least in part on a non-integer rational number, wherein the discontinuous reception cycle configuration comprises a wakeup procedure for the UE based at least in part on a start time for each ON-duration of the plurality of discontinuous reception cycles within the discontinuous reception period, and wherein a timing boundary associated with the start time comprises a timing boundary nearest to the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number, a timing boundary subsequent to the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number, or a timing boundary preceding the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number.
7. The apparatus of claim 6 , wherein the instructions are further executable by the one or more processors to cause the apparatus to:
transmit the indication of the discontinuous reception cycle configuration via radio resource control signaling.
8. The apparatus of claim 6 , wherein the instructions are further executable by the one or more processors to cause the apparatus to:
transmit the indication of the discontinuous reception cycle configuration via one or more of downlink control information or a medium access control (MAC) control element (CE).
9. A method for wireless communication at a user equipment (UE), comprising:
receiving an indication of a discontinuous reception cycle configuration comprising an indication of a plurality of discontinuous reception cycles within a discontinuous reception period, the plurality of discontinuous reception cycles determined based at least in part on a non-integer rational number; and
initiating a wakeup procedure for the UE based at least in part on a start time for each ON-duration of the plurality of discontinuous reception cycles within the discontinuous reception period, wherein a timing boundary associated with the start time comprises a timing boundary nearest to the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number, a timing boundary subsequent to the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number, or a timing boundary preceding the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number.
10. The method of claim 9 , wherein the timing boundary is a slot boundary or a symbol boundary.
11. The method of claim 9 , further comprising:
initiating a discontinuous reception cycle inactivity timer based at least in part on an absolute time relative to the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number or the start time for each ON-duration of the plurality of discontinuous reception cycles to align with the timing boundary.
12. The method of claim 9 , further comprising:
receiving the indication of the discontinuous reception cycle configuration via radio resource control signaling.
13. The method of claim 9 ,
receiving the indication of the discontinuous reception cycle configuration via one or more of downlink control information or a medium access control (MAC) control element (CE).
14. A method for wireless communication at a network entity, comprising:
identifying a traffic periodicity associated with wireless communications traffic to a user equipment (UE); and
transmitting, based at least in part on the traffic periodicity, an indication of a discontinuous reception cycle configuration comprising an indication of a plurality of discontinuous reception cycles within a discontinuous reception period, the plurality of discontinuous reception cycles determined based at least in part on a non-integer rational number, wherein the discontinuous reception cycle configuration comprises a wakeup procedure for the UE based at least in part on a start time for each ON-duration of the plurality of discontinuous reception cycles within the discontinuous reception period, and wherein a timing boundary associated with the start time comprises a timing boundary nearest to the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number, a timing boundary subsequent to the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number, or a timing boundary preceding the start time for each ON-duration of the plurality of discontinuous reception cycles based at least in part on the non-integer rational number.
15. The method of claim 14 , further comprising:
transmitting the indication of the discontinuous reception cycle configuration via radio resource control signaling.
16. The method of claim 14 , further comprising:
transmitting the indication of the discontinuous reception cycle configuration via one or more of downlink control information or a medium access control (MAC) control element (CE).