Mechanism for inter-UE coordination for sidelink DRX UE

Patent metadata

Field	Value
Publication number	US-12501439-B2
Application number	US-202118261430-A
Country	US
Kind code	B2
Filing date	Jan 14, 2021
Priority date	Jan 14, 2021
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

Embodiments of the present disclosure relate to inter-user equipment coordination for sidelink discontinuous reception (DRX) UE. The method includes transmitting, to a second terminal device, a configuration information of discontinuous reception (DRX) associated with at least one of the first terminal device or a third terminal device. The method also includes receiving, from the second terminal device, a resource information indicating a first set of resources allocated for a sidelink communication between the first terminal device and the third terminal device. The method further includes determining a second set of resources for performing the sidelink communication based on the first set of resources and the configuration information.

First claim

What is claimed is:

1 . A user equipment (UE) at a first terminal device, comprising:
at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to:
transmit, to a second terminal device, a configuration information of discontinuous reception (DRX) associated with at least one of the first terminal device or a third terminal device;
receive, from the second terminal device, a resource information indicating a first set of resources allocated for a sidelink communication between the first terminal device and the third terminal device; and
determine a second set of resources for performing the sidelink communication based on the first set of resources and the configuration information.

2 . The UE of claim 1 , wherein the configuration information comprises at least one of:
a first DRX configuration for the first terminal device or a second DRX configuration for the third terminal device.

3 . The UE of claim 2 , wherein the configuration information further comprises an indication regarding whether the first set of resources needs to be determined based on at least one of:
the first DRX configuration for the first terminal device or the second DRX configuration for the third terminal device; wherein the first DRX configuration comprises an identity of the first terminal device and one or more of:
a start time of on-duration of the first terminal device, a length of the on-duration of the first terminal device, or a DRX cycle of the first terminal device; or
wherein the first DRX configuration comprises an identity of the first terminal device and one or more of:
a start time of an active-duration of the first terminal device and an end time of the active-duration of the first terminal device,
a start time of an inactive-duration of the first terminal device and an end time of the inactive-duration of the first terminal device,
the start time of the active-duration of the first terminal device and length of the active-duration of the first terminal device, or
the start time of the inactive-duration of the first terminal device and length of the inactive-duration of the first terminal device;
wherein the second DRX configuration comprises an identity of the third terminal device and one or more of: a start time of on-duration of the third terminal device, a length of the on-duration of the third terminal device, or a DRX cycle of the third terminal device; or wherein the second DRX configuration comprises an identity of the third terminal device and one or more of:
a start time of an active-duration of the third terminal device and an end time of the active-duration of the third terminal device,
a start time of an inactive-duration of the third terminal device and an end time of the inactive-duration of the third terminal device,
the start time of the active-duration of the third terminal device and length of the active-duration of the third terminal device, or
the start time of the inactive-duration of the third terminal device and length of the inactive-duration of the third terminal device; or
wherein the configuration information comprises one or more of:
a start time of an active-duration for the first terminal device and the third terminal device and an end time of the active-duration for the first terminal device and the third terminal device,
a start time of an inactive-duration for the first terminal device and the third terminal device and an end time of the inactive-duration for the first terminal device and the third terminal device,
the start time of the active-duration for the first terminal device and the third terminal device and length of the active-duration for the first terminal device and the third terminal device, or
the start time of the inactive-duration for the first terminal device and the third terminal device and length of the inactive-duration for the first terminal device and the third terminal device.

4 . The UE of claim 1 , wherein transmitting the configuration information comprises one of:
in accordance with a determination that the configuration of DRX has been updated previously, transmitting the configuration information to the second terminal device; in accordance with a determination that a request for allocating resources for the sidelink communication is to be transmitted, transmitting, to the second terminal device, the configuration information in the request; or transmitting, to the second terminal device, the configuration information via a radio resource control (RRC) signaling, a medium access control (MAC) control element (CE) signaling, or a physical layer signaling.

5 . The UE of claim 1 , wherein determining the second set of resources comprises:
determining whether the first set of resources overlaps, in time domain, with an inactive-duration of the first terminal device; in accordance with a determination that the first set of resources overlaps with the inactive-duration of the first terminal device, determining a time duration which comprises an overlapped portion between the inactive-duration and the first set of resources; performing resource evaluation in the time duration; determining the second set of resources based on the resource evaluation; and wherein the time duration of the first terminal device is from an end time of a current on-duration of the first terminal device to a reevaluation cut-off time point of the first set of resources, or the time duration of the first terminal device is from a start time of the first set of resources to an end time of the first set of resources.

6 . The UE of claim 1 , wherein the at least one processor is configured to cause the UE to:
determine whether the first set of resources overlaps, in time domain, with an inactive-duration of the third terminal device; and in accordance with a determination that the first set of resources overlaps with the inactive-duration of the third terminal device, transmit a wake-up information to the third terminal device to enforce the third terminal device performing reception during a time period of the first set of resources; wherein the wake-up information indicating at least one of:
a time period during which the third terminal device needs to wake up,
the first set of resources, or
a timer which starts from a beginning of a period of the first set of resources until an end of the period of the first set of resources.

7 . The UE of claim 1 , wherein determining the second set of resources comprises:
determining whether the first set of resources overlaps with an inactive-duration of the first terminal device; in accordance with a determination that the first set of resources partially overlaps with the inactive-duration of the first terminal device, determines a subset of resources from the first set of resources, the subset of resources overlapping in time domain with an active-duration of the first terminal device; and determining the second set of resources from a plurality of resources.

8 . The UE of claim 1 , wherein the at least one processor is configured to cause the UE to:
in accordance with a determination that the first set of resources overlaps with an inactive-duration of the first terminal device or an inactive-duration of the third terminal device, transmit a resource reselection indication to the second terminal device.

9 . A user equipment (UE) at a second terminal device, comprising:
at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to:
receive, from a first terminal device, a configuration information of discontinuous reception (DRX) associated with at least one of the first termi

Assignees

• Lenovo Beijing Ltd

Inventors

• Hu Jie
• Han Jing
• Wang Haiming
• Wu Lianhai
• Xu Min

Classifications

• H04L1/08

  by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} · CPC title

• H04W72/232

  the control data signalling from the physical layer, e.g. DCI signalling · CPC title

• H04W76/14

  Direct-mode setup · CPC title

• H04W92/18

  between terminal devices · CPC title

• Y02D30/70

  in wireless communication networks · CPC title