Granted Patent B2

US 12,219,435 · App. 17/685,862 · Granted Feb 4, 2025

Inventors: Heng-Li Chin (Taipei, TW); Chia-Hung Lin (Taipei, TW); Hung-Chen Chen (Taipei, TW); Chia-Hung Wei (Taipei, TW); Yung-Lan Tseng (Taipei, TW)

Assignee: SHARP KABUSHIKI KAISHA

H04W4/06H04L1/08H04L1/1812H04W24/08H04W72/1263H04W76/28

Abstract

Claims (41)

1. A method performed by a User Equipment (UE) for management of Multicast-Broadcast Service (MBS) data reception, the method comprising:

receiving a first Discontinuous Reception (DRX) configuration mapped to an MBS, the first DRX configuration including a first timer for controlling activity of the UE for monitoring a Physical Downlink Control Channel (PDCCH) associated with a Group Radio Network Temporary Identifier (G-RNTI) of the MBS;

receiving a first Downlink (DL) assignment associated with the G-RNTI on the PDCCH;

identifying an unsuccessful reception of a Physical Downlink Shared Channel (PDSCH) that is scheduled by the first DL assignment and used for receiving data of the MBS;

starting the first timer after identifying the unsuccessful reception of the PDSCH;

enabling use of a Cell Radio Network Temporary Identifier (C-RNTI) to decode a second DL assignment while the first timer is running;

receiving a second DRX configuration that does not map to any MBS, the second DRX configuration including a second timer;

starting the second timer after identifying the unsuccessful reception of the PDSCH; and

enabling use of the C-RNTI to decode the second DL assignment while the second timer is running.

2. The method according to claim 1 , wherein the first timer is configured to determine a maximum duration until a retransmission of the data of the MBS is received.

3. The method according to claim 1 , wherein the second DL assignment schedules a retransmission of the data of the MBS.

4. The method according to claim 1 , wherein the first DL assignment and the second DL assignment are mapped to a same Hybrid Automatic Repeat Request (HARQ) process Identity (ID).

5. The method according to claim 1 , wherein the first DL assignment and the second DL assignment are scheduled on different PDCCHs or different search spaces.

6. The method according to claim 1 , further comprising: enabling use of the G-RNTI to decode a third DL assignment while the first timer is running.

7. The method according to claim 1 , wherein:

the UE is configured with a Packet Data Convergence Protocol (PDCP) entity associated with a first Radio Link Control (RLC) entity and a second RLC entity;

the first RLC entity is associated with the first DL assignment; and

the second RLC entity is associated with the second DL assignment.

8. The method according to claim 1 , wherein the UE is configured with a plurality of DRX configurations including the first DRX configuration and the second DRX configuration, and each DRX configuration in the plurality of DRX configurations is configured on a per-MBS basis.

9. A User Equipment (UE) for management of Multicast-Broadcast Service (MBS) data reception, the UE comprising:

at least one non-transitory computer-readable medium storing one or more computer-executable instructions; and

at least one processor coupled to the at least one non-transitory computer-readable medium and configured to execute the one or more computer-executable instructions to cause the UE to:

receive a first Discontinuous Reception (DRX) configuration mapped to an MBS, the first DRX configuration including a first timer for controlling activity of the UE for monitoring a Physical Downlink Control Channel (PDCCH) associated with a Group Radio Network Temporary Identifier (G-RNTI) of the MBS;

receive a first Downlink (DL) assignment associated with the G-RNTI on the PDCCH;

identify an unsuccessful reception of a Physical Downlink Shared Channel (PDSCH) that is scheduled by the first DL assignment and used for receiving data of the MBS;

start the first timer after identifying the unsuccessful reception of the PDSCH;

enable use of a Cell Radio Network Temporary Identifier (C-RNTI) to decode a second DL assignment while the first timer is running;

receive a second DRX configuration that does not map to any MBS, the second DRX configuration including a second timer;

start the second timer after identifying the unsuccessful reception of the PDSCH; and

enable use of the C-RNTI to decode the second DL assignment while the second timer is running.

10. The UE according to claim 9 , wherein the first timer is configured to determine a maximum duration until a retransmission of the data of the MBS is received.

11. The UE according to claim 9 , wherein the second DL assignment schedules a retransmission of the data of the MBS.

12. The UE according to claim 9 , wherein the first DL assignment and the second DL assignment are mapped to a same Hybrid Automatic Repeat Request (HARQ) process Identity (ID).

13. The UE according to claim 9 , wherein the first DL assignment and the second DL assignment are scheduled on different PDCCHs or different search spaces.

14. The UE according to claim 9 , wherein the at least one processor is further configured to execute one or more computer-executable instructions to:

enable use of the G-RNTI to decode a third DL assignment while the first timer is running.

15. The UE according to claim 9 , wherein:

the UE is configured with a Packet Data Convergence Protocol (PDCP) entity associated with a first Radio Link Control (RLC) entity and a second RLC entity;

the first RLC entity is associated with the first DL assignment; and

the second RLC entity is associated with the second DL assignment.

16. The UE according to claim 9 , wherein the UE is configured with a plurality of DRX configurations including the first DRX configuration and the second DRX configuration, and each DRX configuration in the plurality of DRX configurations is configured on a per-MBS basis.

Assignments (2)

Continuity (2)

References Cited (17)