Multicast Broadcast Service Terminal Subgroup Indication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In current communication technologies, terminal devices in a multicast broadcast service (MBS) group receive unnecessary service information, leading to increased power consumption and low flexibility due to the semi-static signaling used for grouping.
Innovation Solution
The method involves a terminal device acquiring downlink control information (DCI) and determining subgroup indication information to identify the specific Physical Downlink Shared Channel (PDSCH) that needs to be parsed, based on subgroup IDs and DCI information, thereby reducing unnecessary parsing and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminal devices are grouped via semi-static signaling in MBS, then the grouping is stable and easy to manage, but the terminal devices cannot flexibly select services and must parse all service information, increasing power consumption
Solution Approach 1:
The patent segments the MBS service information transmission by introducing subgroup indication information in DCI. Instead of all terminals in an MBS group parsing all service information, the network device divides terminals into subgroups and sends targeted service information to each subgroup. This segmentation allows terminals to selectively parse only their relevant service information, reducing power consumption while maintaining group management stability.
Solution Approach 2:
The patent introduces dynamic subgroup indication information in DCI that can be updated in real-time based on terminal device service requirements. This dynamic mechanism allows terminals to flexibly switch between different service subgroups without changing the overall MBS group structure, achieving service selection flexibility while maintaining stable group management through the semi-static framework.
2Reliability
If all terminal devices in an MBS group parse all service information, then complete service information is received by all terminals, but unnecessary parsing increases power consumption
Solution Approach 1:
The patent extracts and identifies the specific PDSCH that each terminal needs to parse by using subgroup indication information in DCI. Instead of all terminals parsing all service information, the network device indicates to each terminal which specific PDSCH contains their relevant service information. This extraction approach ensures each terminal receives complete relevant service information while avoiding unnecessary parsing of unrelated information, thereby reducing power consumption.
3Ease of operation
If terminal devices are fixed in MBS groups via semi-static signaling, then group management is simplified, but flexibility in service reception is reduced
Solution Approach 1:
The patent implements a nested structure where terminals remain in stable MBS groups (outer layer) for simplified management, while simultaneously being divided into dynamic subgroups (inner layer) for flexible service reception. The subgroup indication information in DCI allows terminals to switch between subgroups within their MBS group, providing service reception flexibility without complicating the overall group management structure.
Data Source
AI summary
A method for indicating a multicast broadcast service (MBS) is performed by a terminal device. The method includes: acquiring downlink control information (DCI), and determining subgroup indication information according to the DCI; and determining a physical downlink shared channel (PDSCH) scheduled by the DCI that needs to be parsed according to at least one subgroup identifier (ID) corresponding to the terminal device and the subgroup indication information, wherein the PDSCH is configured to carry the MBS.