Terminal Device MBS Configuration for RRC Inactive State Reception
Solution Overview
Problem
In the New Radio (NR) system, terminal devices can only receive multicast Multimedia Broadcast Services (MBS) in an RRC connected state, limiting energy conservation and requiring improvement to enable reception in an RRC inactive state.
Innovation Solution
A method and apparatus for determining target MBS configuration information when a terminal device reselects a target cell, allowing multicast MBS reception based on this information, even in an RRC inactive state, through specific signaling and configuration management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If terminal device receives multicast MBS only in RRC connected state, then service reliability is ensured, but energy consumption increases and service continuity is limited
Solution Approach 1:
The patent implements dynamic state management for multicast MBS reception, allowing the terminal device to flexibly switch between RRC connected and inactive states based on service requirements. The device can maintain RRC inactive state while receiving multicast MBS, dynamically adjusting its operational mode to balance energy consumption and service reliability.
Solution Approach 2:
The patent changes the operational parameters of the terminal device by introducing a new reception mode where multicast MBS can be received in RRC inactive state. This parameter change (state transition) enables energy conservation while maintaining service functionality through proper configuration management of target MBS parameters.
2Ease of operation
If terminal device performs cell reselection in RRC inactive state, then mobility is improved, but configuration information management becomes complex
Solution Approach 1:
The patent applies preliminary action by pre-configuring target MBS configuration information before cell reselection occurs. The network device provides this configuration information in advance through release signaling, enabling the terminal device to perform cell reselection in RRC inactive state without complex configuration management during the transition.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network device acts as a mediator to manage configuration information. The network device provides target MBS configuration information through release signaling, simplifying the terminal device's role during cell reselection and reducing configuration management complexity.
3Use of energy by moving object
If terminal device maintains RRC connected state for multicast MBS reception, then service continuity is ensured, but energy conservation is limited
Solution Approach 1:
The patent implements dynamic state management that allows the terminal device to maintain RRC inactive state while receiving multicast MBS. This dynamic approach enables the device to conserve energy by avoiding continuous RRC connected state, while service continuity is maintained through proper handover and configuration management during cell reselection.
Solution Approach 2:
The patent ensures continuity of useful action by enabling multicast MBS reception throughout cell reselection processes. The target MBS configuration information is maintained and applied across cell boundaries, ensuring uninterrupted service while allowing the terminal device to operate in energy-efficient RRC inactive state.
Data Source
AI summary
A method for determining configuration information, a terminal device, and a chip are provided. In the method, when a terminal device reselects a target cell by performing cell selection, target Multimedia Broadcast Service (MBS) configuration information is determined; and a multicast MBS is received based on the target MBS configuration information.