Simultaneous Bearer Configuration for MBS Mobility in RRC Connected
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Solution Overview
Problem
Current communication systems face challenges in supporting mobility for terminal devices when receiving Multimedia Broadcast Service (MBS) in a multicast manner under the RRC connected status, particularly in scenarios involving both unicast and multicast services.
Innovation Solution
A method and apparatus for bearer configuration that includes transmitting a bearer configuration instruction from a network device to a terminal device to configure a Signaling Radio Bearer (SRB2) and at least one data bearer, which can be either a Data Radio Bearer (DRB) or a Multicast Radio Bearer (MRB), ensuring simultaneous configuration and release of bearers to maintain RRC connection and support mobility processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device enters RRC connected status to receive MBS service in multicast manner, then the service reception capability is improved, but the mobility support becomes unclear and complex
Solution Approach 1:
The patent segments the bearer configuration into distinct types (SRB2 for signaling, DRB for unicast data, MRB for multicast data) with specific configuration rules. Each bearer type has dedicated configuration parameters and procedures, allowing the system to handle different service types independently while maintaining overall mobility support clarity
Solution Approach 2:
The patent establishes preliminary bearer configuration rules before mobility events occur. The network configures appropriate bearers (SRB2, DRB, MRB) in advance based on service requirements, and the terminal device follows predefined procedures for bearer maintenance during mobility, eliminating the need for complex real-time mobility decision-making
2Reliability
If SRB2 and data bearers are configured simultaneously, then the RRC connection maintenance is improved, but the configuration complexity increases
Solution Approach 1:
The patent merges the configuration of SRB2 and data bearers into a single coordinated procedure. The RRC reconfiguration message simultaneously configures signaling bearers and data bearers with linked parameters, ensuring that both are established together to maintain RRC connection while avoiding the complexity of separate configuration procedures
Solution Approach 2:
The patent introduces an intermediary configuration mechanism where the RRC reconfiguration message serves as a mediator that coordinates the simultaneous setup of SRB2 and data bearers. The configuration includes interconnected parameters that ensure proper establishment of both signaling and data bearers in a unified procedure
Data Source
AI summary
A bearer configuration method and apparatus, a terminal device and a network device are provided. The method comprises: a terminal device receives a bearer configuration instruction sent by a network device, the bearer configuration instruction being configured to configure an SRB 2 and at least one data bearer for the terminal device, wherein the at least one data bearer comprises at least one DRB and/or at least one MRB.