Method and apparatuses for NR sidelink discontinuous reception

Patent metadata

Field	Value
Publication number	US-12563638-B2
Application number	US-202218552720-A
Country	US
Kind code	B2
Filing date	Mar 31, 2022
Priority date	Mar 31, 2021
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

A first apparatus receives, from a second apparatus via a sidelink (SL) transmission, first configuration parameters for a first SL DRX group and second configuration parameters for a second SL DRX group. The first configuration parameters for the first SL DRX group comprise: a common SL DRX parameter set that is shared with the second configuration parameters for the second SL DRX group, and a first dedicated SL DRX configuration parameter set. The first dedicated DRX parameter set comprises: a first on duration at the beginning of a SL DRX cycle of the first apparatus, and a first duration: after an occasion of a PSCCH carrying a first-stage SL control information (SCI) indicates a new SL transmission for a MAC entity of the first apparatus, or after an occasion of a PSSCH carrying a second-stage SCI indicates a new SL transmission for the MAC entity of the first apparatus. The first apparatus determines that the first apparatus is in a first SL active time for receiving information on the SL based on the first configuration parameters for the first SL DRX group, and in a second SL active time for receiving information on the SL based on the configuration parameter for the second SL DRX group.

First claim

What is claimed is:

1 . A first apparatus that performs wireless communication comprising:
a processor; and memory coupled with the processor, the memory comprising executable instructions stored thereon that when executed by the processor cause the processor to effectuate operations comprising: receiving, from a second apparatus via a sidelink (SL) transmission, a first dedicated configuration parameter set for a first SL sidelink discontinuous reception (DRX) group, second dedicated configuration parameter set for a second SL DRX group, and a common SL DRX configuration parameter set, wherein: the first dedicated configuration parameter set comprises: a first on duration at the beginning of a SL DRX cycle of the first apparatus, and a first duration: after an occasion of a physical sidelink control channel (PSCCH) carrying a first-stage SL control information (SCI) indicates a new SL transmission for a media access control (MAC) entity of the first apparatus in the first SL DRX group, and after an occasion of a physical sidelink shared channel (PSSCH) carrying a second-stage SCI indicates a new SL transmission for the MAC entity of the first apparatus in the first SL DRX group; and the second dedicated configuration parameter set comprises: a second on duration at the beginning of the SL DRX cycle of the first apparatus, and a second duration: after an occasion of a PSCCH carrying a first-stage SL control information (SCI) indicates a new SL transmission for a MAC entity of the first apparatus in the second SL DRX group, and after an occasion of a PSSCH carrying a second-stage SCI indicates a new SL transmission for the MAC entity of the first apparatus in the second SL DRX group; and the common SL DRX configuration parameter set comprises: the SL DRX cycle of the first apparatus, or a third duration until a SL retransmission is received; determining a first active time based on the common SL DRX configuration parameter set or the first dedicated configuration parameter set; determining a second active time based on the common SL DRX configuration parameter set or the second dedicated configuration parameter set; and determining a first device active time, wherein the first device active time comprises the first active time or the second active time.

2 . The first apparatus of claim 1 , the operations further comprising receiving a first SL DRX command MAC control element (CE) for the first SL DRX group or a second SL DRX command MAC CE for the second SL DRX group, and
executing a stop of the first on duration and the first duration based on receiving the first SL MAC CE, or executing a stop of the first on duration and the first duration based on receiving the second SL MAC CE.

3 . The first apparatus of claim 1 , wherein the first SL DRX group comprises a first group of SL communication resources, and the second SL DRX group comprises a second group of SL communication resources, wherein the first group of SL communication resources comprises a first set of time resources and carrier frequency resources, or wherein the second group of SL communication resources comprises a second set of time resources and carrier frequency resources.

4 . The first apparatus of claim 1 , wherein the first SL DRX group is a first pair of a first SL source layer-2 (L2) identifier (ID) and a first SL destination L2 ID, and the second SL DRX group is a second pair of a second source L2 ID and a second SL destination L2 ID.

5 . The first apparatus of claim 1 , wherein the first SL DRX group is a first SL quality of service (QOS) configuration parameters set, and the second SL DRX group is a second QoS configuration parameters set.

6 . The first apparatus of claim 3 , wherein the carrier frequency resources of the first set of time and carrier frequency resources or the second set of time and carrier frequency resources comprise a component carrier or bandwidth part.

7 . The first apparatus of claim 1 , wherein the first dedicated configuration parameter for the control of a DRX procedure are preconfigured in the first apparatus.

8 . The first apparatus of claim 1 , the operations further comprising monitoring, during the first device active time, the first-stage SCI and the second-stage SCI in SL DRX.

9 . The first apparatus of claim 8 , wherein the first dedicated configuration parameter of the first DRX group comprises a minimum duration before a SL assignment for SL hybrid automatic repeat request (HARQ) retransmission is expected by the MAC entity, and if the first-stage SCI or the second-stage SCI indicate a SL transmission, the first apparatus starts the minimum duration before a SL assignment for SL HARQ retransmission is expected by the MAC entity.

10 . The first apparatus of claim 8 , the operations further comprising if the first-stage SCI and the second-stage SCI indicates a new SL transmission, starting or restarting the first duration for the first SL DRX group in a first symbol after an end of reception of the first-stage SCI and the second-stage SCI.

11 . The first apparatus of claim 1 , the operations further comprising if a DRX hybrid automatic repeat request-round-trip time-TimerSL (drx-HARQ-RTT-TimerSL) expires, the first apparatus starts a drx-RetransmissionTimerSL for the corresponding SL HARQ process.

12 . The first apparatus of claim 1 , wherein the first apparatus comprises a user equipment or a roadside unit.

13 . The first apparatus of claim 1 , wherein the second apparatus comprises a base station, a relay, user equipment, a roadside unit, or a core network node.

14 . A method comprising:
receiving, by a first apparatus from a second apparatus via a sidelink (SL) transmission, a first dedicated configuration parameter set for a first SL sidelink discontinuous reception (DRX) group, second dedicated configuration parameter set for a second SL DRX group, and a common SL DRX configuration parameter set, wherein: the first dedicated configuration parameter set comprises: a first on duration at the beginning of a SL DRX cycle of the first apparatus, and a first duration: after an occasion of a physical sidelink control channel (PSCCH) carrying a first-stage SL control information (SCI) indicates a new SL transmission for a media access control (MAC) entity of the first apparatus in the first SL DRX group, and after an occasion of a physical sidelink shared channel (PSSCH) carrying a second-stage SCI indicates a new SL transmission for the MAC entity of the first apparatus in the first SL DRX group; and the second dedicated configuration parameter set comprises: a second on duration at the beginning of the SL DRX cycle of the first apparatus, and a second duration: after an occasion of a PSCCH carrying a first-stage SL control information (SCI) indicates a new SL transmission for a MAC entity of the first apparatus in the second SL DRX group, and after an occasion of a PSSCH carrying a second-stage SCI indicates a new SL transmission for the MAC entity of the first apparatus in the second SL DRX group; and the common SL DRX configuration parameter set comprises: the SL DRX cycle of the first apparatus, or a third duration until a SL retransmission is received; determining a first active time based on the common SL DRX configuration parameter set or the first dedicated configuration parameter set; determining a second active time based on the common SL DRX configuration parameter set or the second dedicated configuration parameter set; and determining a first device active time, wherein the first device active time comprises the first active time or the second active

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Adjakple Pascal
• Di Girolamo Rocco
• Vogedes Jerome
• Li Yifan
• Pan Kyle

Classifications

• H04W72/25

  between terminals via a wireless link, e.g. sidelink · CPC title

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04W74/0808

  using carrier sensing, e.g. carrier sense multiple access [CSMA] · CPC title

• H04W72/02

  Selection of wireless resources by user or terminal · CPC title

• H04W88/02

  Terminal devices · CPC title