RRC Message SCG Configuration for Dual-Connectivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in dual-connectivity operations where multiple connections are used, but often result in suboptimal performance.
Innovation Solution
The implementation of a method for dual-connectivity operation in wireless communication systems, where a user equipment (UE) receives a radio resource control (RRC) message with secondary cell group (SCG) configuration parameters, allowing for the addition of SCG without initial radio bearer establishment, and enabling efficient message exchange for data radio bearer reconfiguration between the master cell group and SCG.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple connections are used to improve communication capacity and speed, then communication flexibility and efficiency are improved, but system complexity increases
Solution Approach 1:
The patent segments the radio connection into two independent cell groups: master cell group (MCG) and secondary cell group (SCG). Each cell group can be configured, added, and modified independently through separate RRC messages, allowing the system to manage multiple connections without overwhelming complexity. The UE maintains separate MAC entities for each cell group, enabling parallel processing of radio resource management operations.
Solution Approach 2:
The patent introduces preliminary SCG configuration parameters in the RRC connection reconfiguration message before actual data transmission begins. The network can pre-configure SCG parameters including cell identifiers, radio resource settings, and bearer configurations, allowing the UE to prepare and activate the secondary connection without interrupting ongoing communications or requiring complex real-time coordination.
2Adaptability or versatility
If SCG is added with initial radio bearer establishment, then communication flexibility is improved, but setup time and complexity increase
Solution Approach 1:
The patent separates the SCG addition procedure from DRB establishment by using independent RRC configuration messages. The master node can add SCG configuration parameters without immediately establishing data bearers, allowing the UE to prepare and activate the secondary cell group structure independently of data transmission setup. This segmentation enables faster SCG activation when needed.
Solution Approach 2:
The patent enables dynamic configuration of SCG parameters through RRC connection reconfiguration messages that can be sent at any time during the connection lifecycle. The network can dynamically add, modify, or remove SCG configuration without requiring complete TEID reconfiguration, allowing flexible adaptation to changing communication needs while maintaining existing bearers.
3Productivity
If DRB reconfiguration is performed through complex message exchange, then communication efficiency is improved, but message processing complexity increases
Solution Approach 1:
The patent segments the DRB reconfiguration process into independent MCG and SCG configuration components. Each cell group can have its own DRB configured through separate RRC messages, allowing the network to modify bearers in one cell group without affecting the other. This segmentation simplifies message processing by eliminating the need for complex coordinated reconfiguration across multiple connections.
Solution Approach 2:
The patent uses parameter-based configuration where the RRC message carries specific SCG configuration parameters (such as cell identifiers, radio resource settings, and bearer configurations) that the UE applies directly without complex processing. The UE compares new parameters with existing configurations and applies changes selectively, reducing processing complexity while maintaining communication efficiency.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method for receiving a radio resource control (RRC) message by a user equipment (UE) is described. The method includes receiving an RRC connection reconfiguration (RRCConnectionReconfiguration) message including secondary cell group (SCG) configuration parameters. The RRC connection reconfiguration message has a structure that the SCG configuration parameters do not include a data radio bearer (DRB) configuration.