Terminal RRC Reconfiguration for MBS Session Management
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Solution Overview
Problem
Current technologies lack efficient control mechanisms for Multimedia Broadcast Multicast Service (MBS) operations in New Radio (NR) networks, which are distinct from Evolved Universal Terrestrial Radio Access (E-UTRA) and require specific core network considerations.
Innovation Solution
A terminal apparatus and base station apparatus that utilize RRC reconfiguration messages with DRB and MRB configuration list parameters to manage PDU sessions, indicating resource release for efficient MBS control in NR networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RRC reconfiguration message includes full configuration parameter, then user plane resources are properly released for MBS control, but processing complexity increases for each PDU session
Solution Approach 1:
The patent segments the configuration management by identifying and processing individual PDU sessions separately. The terminal apparatus processes each PDU session independently to determine whether to release user plane resources, dividing the complex full configuration task into manageable session-level operations. This segmentation reduces overall processing complexity while maintaining reliable MBS control.
2Productivity
If user plane resources are released for all PDU sessions, then MBS control is optimized, but service continuity may be affected
Solution Approach 1:
The patent applies local quality by selectively releasing user plane resources only for specific PDU sessions that are not configured with DRB or MRB, rather than uniformly releasing resources for all sessions. This targeted approach optimizes MBS control for applicable sessions while preserving service continuity for sessions that require ongoing user plane resources, achieving both efficiency and reliability.
Data Source
AI summary
A terminal apparatus for communicating with a base station apparatus includes a receiver configured to receive a Radio Resource Control (RRC) reconfiguration message including a first parameter from the base station apparatus, and a processing unit. The processing unit performs first processing on each session not to be added with the first parameter among the sessions already configured for the terminal apparatus, based at least on that a parameter indicating a full configuration is included in the RRC reconfiguration message. The first parameter is an MRB configuration list parameter. The first processing includes indicating to an upper layer that a user plane resource for each session not to be added has been released.