Beam sweeping during an on-period of a DRX cycle
Techniques are described herein for periodically transmitting a first set of signals (e.g., reference signals) during an on-period of a discontinuous reception (DRX) cycle rather than during an off-period of the DRX cycle. Such techniques may enable a user equipment (UE) operating in a DRX mode to conserve additional power during the DRX cycle. A periodicity for transmitting the first set of signals during the on-period may be determined. The periodicity may indicate that every one-in-N DRX cycles, the first set of signals are to be transmitted during the on-period. During other DRX cycles, the first set of signals may be transmitted during the off-period. When the first set of signals are transmitted during the on-period, the UE may refrain from activating certain components during the off-period, thereby conserving power.
1. A method for wireless communication at a user equipment (UE), comprising:
receiving, from a network device, signaling that indicates a periodicity of beam sweep procedures performed during off-periods of discontinuous reception (DRX) cycles associated with a DRX mode;
monitoring, while operating in the DRX mode, for a first set of wake-up signals transmitted by the network device using a first set of beams during a first on-period of a first DRX cycle, the first set of beams selected as part of a first beam sweep procedure performed during a first off-period of the first DRX cycle in accordance with the indicated periodicity; and
monitoring, while operating in the DRX mode, for a second set of wake-up signals transmitted by the network device using the first set of beams during a second on-period of a second DRX cycle based at least in part on the indicated periodicity.
2. The method of claim 1 , further comprising:
transmitting, to the network device, status information indicating one or more operating parameters of the UE, wherein the indicated periodicity is based at least in part on the status information.
3. The method of claim 1 , further comprising:
comparing the indicated periodicity to an index of the second DRX cycle, wherein monitoring for the second set of wake-up signals using the first set of beams during the second on-period of the second DRX cycle is based at least in part on comparing the indicated periodicity to the index of the second DRX cycle.
4. The method of claim 1 , further comprising:
refraining from performing a second beam sweep procedure during a second off-period of the second DRX cycle based at least in part on the indicated periodicity.
5. The method of claim 4 , wherein the second off- period of the second DRX cycle is between the first on-period of the first DRX cycle and the second on-period of the second DRX cycle in time.
6. The method of claim 1 , wherein the signaling indicates a second periodicity of beam sweep procedures performed during on-periods of the DRX cycles associated with the DRX mode, the method comprising:
performing, while operating in the DRX mode, a second beam sweep procedure during a third on-period of a third DRX cycle in accordance with the indicated second periodicity.
7. The method of claim 6 , wherein performing a beam sweep procedure in accordance with the indicated second periodicity occurs once in every N DRX on-periods, wherein N is an integer that is two or more.
8. The method of claim 7 , wherein monitoring for wake-up signals transmitted by the network device during on-periods of the DRX cycles occurs during non-N on-periods of the DRX cycles.
9. The method of claim 6 , further comprising:
receiving a set of signals during the third on-period of the third DRX cycle in accordance with the indicated second periodicity, wherein performing the second beam sweep procedure is based at least in part on receiving the set of signals.
10. The method of claim 9 , further comprising:
identifying wake-up information encoded in at least one reference signal of the set of signals transmitted during the third on-period of the third DRX cycle.
11. The method of claim 9 , wherein the set of signals comprises a physical downlink control channel (PDCCH) with one or more cyclic redundancy check (CRC) bits scrambled using a radio network temporary identifier (RNTI) associated with the UE.
12. The method of claim 9 , wherein the set of signals comprises channel state information reference signals (CSI-RSs), primary synchronization signals (PSSs), secondary synchronization signals (SSSs), demodulation reference signals (DMRSs) of physical broadcast channels (PBCHs), or tracking reference signals, or a combination thereof.
13. The method of claim 6 , further comprising:
monitoring, using a second set of beams selected as part of the second beam sweep procedure, for a third set of wake-up signals during a fourth on-period of a fourth DRX cycle based at least in part on performing the second beam sweep procedure during the third on-period of the third DRX cycle.
14. A method for wireless communication at a network device, comprising:
transmitting signaling that indicates a periodicity of beam sweep procedures performed during off-periods of discontinuous reception (DRX) cycles associated with a DRX mode for a user equipment (UE);
transmitting, in accordance with the DRX mode, a first set of wake-up signals using a first set of beams during a first on-period of a first DRX cycle, the first set of beams selected as part of a first beam sweep procedure performed during a first off-period of the first DRX cycle in accordance with the indicated periodicity; and
transmitting, in accordance with the DRX mode, a second set of wake-up signals using the first set of beams during a second on-period of a second DRX cycle based at least in part on the indicated periodicity.
15. The method of claim 14 , further comprising:
receiving status information indicating one or more operating parameters of the UE, wherein the indicated periodicity is based at least in part on the status information.
16. The method of claim 14 , further comprising:
comparing the indicated periodicity to an index of the second DRX cycle, wherein transmitting the second set of wake-up signals using the first set of beams during the second on-period of the second DRX cycle is based at least in part on comparing the indicated periodicity to the index of the second DRX cycle.
17. The method of claim 14 , further comprising:
refraining from performing a second beam sweep procedure during a second off- period of the second DRX cycle based at least in part on the indicated periodicity.
18. The method of claim 16 , wherein the second off- period of the second DRX cycle is between the first on-period of the first DRX cycle and the second on-period of the second DRX cycle in time.
19. The method of claim 14 , wherein the signaling indicates a second periodicity of beam sweep procedures performed during on-periods of the DRX cycles associated with the DRX mode, the method comprising:
performing a second beam sweep procedure during a third on-period of a third DRX cycle in accordance with the indicated second periodicity.
20. The method of claim 19 , wherein performing a beam sweep procedure in accordance with the indicated second periodicity occurs once in every N DRX on-periods, wherein Nis an integer that is two or more.
21. The method of claim 20 , wherein transmitting wake-up signals during on-periods of the DRX cycles occurs during non-N on-periods of the DRX cycles.
22. The method of claim 19 , further comprising:
transmitting a set of signals during the third on-period of the third DRX cycle in accordance with the indicated second periodicity, wherein performing the second beam sweep procedure is based at least in part on transmitting the set of signals.
23. The method of claim 22 , further comprising:
encoding wake-up information in at least one reference signal of the set of signals transmitted during the third on-period of the third DRX cycle.
24. The method of claim 22 , wherein the set of signals comprises a physical downlink control channel (PDCCH) with one or more cyclic redundancy check (CRC) bits scrambled using a radio network temporary identifier (RNTI) associated with the UE.
25. The method of claim 22 , wherein the set of signals comprises channel state information reference signals (CSI-RSs), primary synchronization signals (PSSs), secondary synchronization signals (SSSs), demodulation reference signals (DMRSs) of physical broadcast channels (PBCHs), or tracking reference signals, or a combination thereof.
26. The method of claim 19 , further comprising:
transmitting, using a second set of beams selected as part of the second beam sweep procedure, a third set of wake-up signals during a fourth on-period of a fourth DRX cycle based at least in part on performing the second beam sweep procedure during the third on-period of the third DRX cycle.
27. An apparatus for wireless communications at a user equipment (UE), comprising:
one or more processors,
one or more memories 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, from a network device, signaling that indicates a periodicity of beam sweep procedures performed during off-periods of discontinuous reception (DRX) cycles associated with a DRX mode;
monitor, while operating in the DRX mode, for a first set of wake-up signals transmitted by the network device using a first set of beams during a first on-period of a first DRX cycle, the first set of beams selected as part of a first beam sweep procedure performed during a first off-period of the first DRX cycle in accordance with the indicated periodicity; and
monitor, while operating in the DRX mode, for a second set of wake-up signals transmitted by the network device using the first set of beams during a second on-period of a second DRX cycle based at least in part on the indicated periodicity.
28. The apparatus of claim 27 , wherein the instructions are further executable by the one or more processors to cause the apparatus to:
transmit, to the network device, status information about the UE, wherein the indicated periodicity is based at least in part on the status information.
29. The apparatus of claim 27 , wherein the instructions are further executable by the one or more processors to cause the apparatus to:
compare the indicated periodicity to an index of the second DRX cycle, wherein monitoring for the second set of wake-up signals using the first set of beams during the second on-period of the second DRX cycle is based at least in part on comparing the indicated periodicity to the index of the second DRX cycle.
30. An apparatus for wireless communications at a network device, comprising:
one or more processors,
one or more memories coupled with the one or more processors; and
instructions stored in the memory and executable by the processor one or more processors to cause the apparatus to:
transmit signaling that indicates a periodicity of beam sweep procedures performed during off-periods of discontinuous reception (DRX) cycles associated with a DRX mode for a user equipment (UE);
transmit, in accordance with the DRX mode, a first set of wake-up signals using a first set of beams during a first on-period of a first DRX cycle, the first set of beams selected as part of a first beam sweep procedure performed during a first off-period of the first DRX cycle in accordance with the indicated periodicity; and
transmit, in accordance with the DRX mode, a second set of wake-up signals using the first set of beams during a second on-period of a second DRX cycle based at least in part on the indicated periodicity.