Method and apparatus for sidelink DRX operation

Patent metadata

Field	Value
Publication number	US-12446102-B2
Application number	US-202017927587-A
Country	US
Kind code	B2
Filing date	Jun 12, 2020
Priority date	Jun 12, 2020
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

Embodiments of the present application are directed to a method and apparatus for sidelink DRX operation. An exemplary method may include: configuring DRX information for sidelink, wherein the DRX information includes a value of DRX on-duration timer, a DRX cycle, and at least one DRX offset value; and starting the DRX on-duration timer from a beginning position based on the DRX cycle and the DRX offset value.

First claim

What is claimed is:

1. A user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and operable to cause the UE to:
configure discontinuous reception (DRX) functionality for sidelink, wherein the DRX functionality includes a definition of active time for the UE; and
monitor physical sidelink control channel (PSCCH) continuously when the UE is in the active time, wherein the active time includes time between transmission of a request for information and reception of the requested information.

2. The UE of claim 1 , wherein the active time further includes time while one of sl-drx-onDurationTimer, sl-drx-Inactivity Timer or sl-drx-Retransmission Timer is running.

3. The UE of claim 1 , wherein the requested information is sidelink-channel state information (SL-CSI).

4. The UE of claim 1 , wherein the active time further includes a time while a DRX sidelink-channel state information (SL-CSI) timer is running, wherein a value of the DRX SL-CSI timer is configured by higher layer signaling or determined by SL-CSI latency bound.

5. The UE of claim 4 , wherein the at least one processor is further operable to cause the UE to:
start the DRX SL-CSI timer after transmitting a SL-CSI request plus time T, wherein the time T is configured by higher layer or specified directly, or the time Tis zero.

6. A processor for wireless communication, comprising:
at least one controller coupled with at least one memory and operable to cause the processor to:
configure discontinuous reception (DRX) functionality for sidelink, wherein the DRX functionality includes a definition of active time for a user equipment (UE); and
monitor physical sidelink control channel (PSCCH) continuously when the UE is in the active time, wherein the active time includes time between transmission of a request for information and reception of the requested information.

7. The processor of claim 6 , wherein the active time further includes time while one of sl-drx-onDurationTimer, sl-drx-InactivityTimer or sl-drx-Retransmission Timer is running.

8. The processor of claim 6 , wherein the requested information is sidelink-channel state information (SL-CSI).

9. The processor of claim 6 , wherein the active time further includes a time while a DRX sidelink-channel state information (SL-CSI) timer is running, wherein a value of the DRX SL-CSI timer is configured by higher layer signaling or determined by SL-CSI latency bound.

10. The processor of claim 9 , wherein the at least one controller is operable to cause the processor to:
start the DRX SL-CSI timer after transmitting a SL-CSI request plus time T, wherein the time T is configured by higher layer or specified directly, or the time Tis zero.

11. A method performed by a user equipment (UE), the method comprising:
configuring discontinuous reception (DRX) functionality for sidelink, wherein the DRX functionality includes a definition of active time for the UE; and
monitoring physical sidelink control channel (PSCCH) continuously when the UE is in the active time, wherein the active time includes time between transmission of a request for information and reception of the requested information.

12. The method of claim 11 , wherein the active time further includes time while one of sl-drx-onDurationTimer, sl-drx-Inactivity Timer or sl-drx-Retransmission Timer is running.

13. The method of claim 11 , wherein the requested information is sidelink-channel state information (SL-CSI).

14. The method of claim 11 , wherein the active time further includes a time while a DRX sidelink-channel state information (SL-CSI) timer is running, wherein a value of the DRX SL-CSI timer is configured by higher layer signaling or determined by SL-CSI latency bound.

15. The method of claim 14 , further comprising:
starting the DRX SL-CSI timer after transmitting a SL-CSI request plus time T, wherein the time T is configured by higher layer or specified directly, or the time Tis zero.

Assignees

• Lenovo Beijing Ltd

Inventors

• Han Jing
• Wu Lianhai
• Yue Ran
• Wang Haiming
• Hu Jie
• Shi Jie

Classifications

• H04W92/18

  between terminal devices · CPC title

• H04L1/1848

  Time-out mechanisms · CPC title

• H04W52/028

  switching on or off only a part of the equipment circuit blocks · CPC title

• H04W52/0219

  where the power saving management affects multiple terminals · CPC title

• Y02D30/70

  in wireless communication networks · CPC title