Semi-persistent scheduling method for multicast/broadcast service, apparatus and storage medium

Patent metadata

Field	Value
Publication number	US-12513680-B2
Application number	US-202118028510-A
Country	US
Kind code	B2
Filing date	Sep 23, 2021
Priority date	Sep 28, 2020
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

The present application provides a semi-persistent scheduling method for a multicast/broadcast service, an apparatus and a storage medium. A network device configures semi-persistent configuration information for terminal devices in advance, and the semi- persistent configuration information includes a first identifier for scrambling activation information and related information of a PDSCH for sending a multicast/broadcast service. Every time multicast/broadcast service data transmission is required, the network device sends the activation information to terminal devices according to the first identifier to indicate activating the semi-persistent configuration information, and then sends the PDSCH to the terminal devices by multicast/broadcast according to the semi-persistent configuration information, to realize that multicast/broadcast service data is transmitted from the network device to N terminal devices by multicast/broadcast.

First claim

The invention claimed is:

1 . A semi-persistent scheduling method for a multicast/broadcast service, comprising:
receiving, by a terminal device, semi-persistent configuration information for a multicast/broadcast service from a network device, wherein the semi-persistent configuration information comprises a first identifier and related information of a physical downlink shared channel (PDSCH) for multicast/broadcast service transmission; receiving, by the terminal device, activation information from the network device according to the first identifier, wherein the activation information is used to indicate activating the semi-persistent configuration information, and the first identifier is a first-type identifier or a second-type identifier, wherein the first-type identifier is used to identify a terminal device, and the second-type identifier is used to identify a terminal device group of a multicast/broadcast service which a terminal device belongs to; and receiving, by the terminal device, the PDSCH from the network device according to the activation information and the semi-persistent configuration information, wherein the PDSCH carries multicast/broadcast service data.

2 . The method according to claim 1 , wherein the first-type identifier is a configured scheduling radio network temporary identifier (CS-RNTI).

3 . The method according to claim 1 , wherein the second-type identifier is a group configured scheduling radio network temporary identifier (GCS-RNTI).

4 . The method according to claim 1 , wherein a scrambling sequence of the PDSCH is obtained according to the second-type identifier, or,
the semi-persistent configuration information further comprises a third-type identifier, wherein the third-type identifier is used to generate a scrambling sequence of a PDSCH, and the scrambling sequence of the PDSCH is obtained according to the third-type identifier, wherein the third-type identifier is a group radio network temporary identifier (G-RNTI) or a GCS-RNTI.

5 . The method according to claim 1 , wherein before receiving, by the terminal device, the PDSCH from the network device, the method further comprises:
activating, by the terminal device, the semi-persistent configuration information according to the activation information.

6 . The method according to claim 5 , wherein receiving, by the terminal device, the activation information from the network device comprises:
receiving, by the terminal device, the activation information which is sent by the network device to the terminal device multiple times according to the second-type identifier.

7 . The method according to claim 1 , wherein after receiving, by the terminal device, the PDSCH from the network device according to the activation information and the semi-persistent configuration information, the method further comprises:
sending, by the terminal device, first reception confirmation information to the network device, wherein the first reception confirmation information is used to indicate whether the PDSCH is received successfully.

8 . The method according to claim 7 , wherein the first identifier is the first-type identifier, and the activation information comprises physical uplink control channel (PUCCH) resource indication information and timing information;
sending, by the terminal device, the first reception confirmation information to the network device comprises: determining, by the terminal device, PUCCH resource information of the first reception confirmation information according to the PUCCH resource indication information of the activation information; determining, by the terminal device, timing information of the first reception confirmation information according to the timing information of the activation information; sending, by the terminal device, the first reception confirmation information to the network device according to the PUCCH resource information and the timing information of the first reception confirmation information.

9 . The method according to claim 7 , wherein after sending, by the terminal device, the first reception confirmation information to the network device, the method further comprises:
receiving, by the terminal device, scheduling information for PDSCH retransmission from the network device, wherein the scheduling information is scrambled by a CS-RNTI or a GCS-RNTI.

10 . The method according to claim 1 , wherein the first identifier is the second-type identifier, and the activation information is further used to indicate that downlink control information obtained by scrambling using the second-type identifier is not required to be detected within a preset time period.

11 . The method according to claim 1 , wherein the semi-persistent configuration information comprises a second identifier, and the method further comprises:
receiving, by the terminal device, deactivation information from the network device according to the second identifier, wherein the deactivation information is used to indicate deactivating the semi-persistent configuration information; wherein the second identifier is the first-type identifier or the second-type identifier.

12 . The method according to claim 11 , wherein the method further comprises:
deactivating, by the terminal device, the semi-persistent configuration information according to the deactivation information; and/or, determining, by the terminal device according to the deactivation information, that a multicast/broadcast communication mode of the terminal device is switched from a point to multi-point communication mode to a point to point communication mode.

13 . The method according to claim 12 , wherein,
upon determining that the second identifier is the first-type identifier, the deactivation information further indicates switching a terminal device receiving the deactivation information from a point to multi-point communication mode to a point to point communication mode; upon determining that the second identifier is the second-type identifier, the deactivation information further indicates switching terminal devices belonging to the terminal device group from a point to multi-point communication mode to a point to point communication mode.

14 . The method according to claim 11 , wherein upon determining that the second identifier is the second-type identifier, the deactivation information is further used to indicate that second reception confirmation information is not required to be fed back, wherein the second reception confirmation information is used to indicate whether the deactivation information is received successfully.

15 . The method according to claim 11 , wherein the related information of the PDSCH comprises PUCCH resource information corresponding to the PDSCH, the first identifier is the first-type identifier, and the deactivation information comprises timing information;
after receiving, by the terminal device, the deactivation information from the network device according to the second identifier, the method further comprises: determining, by the terminal device, PUCCH resource information of second reception confirmation information according to the PUCCH resource information corresponding to the PDSCH; determining, by the terminal device, timing information of the second reception confirmation information according to the timing information of the deactivation information; sending, by the terminal device, the second reception confirmation information to the network device according to the PUCCH resource information and the timing information of the second reception confirmation information, w

Assignees

• Datang mobile communications equipment co ltd

Inventors

• Wang Junwei

Classifications

• H04W72/30 Primary

  Resource management for broadcast services · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/11 Primary

  Semi-persistent scheduling · CPC title

• H04W4/06 Primary

  Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services · CPC title