Data Bearer Reconfiguration in 5G Dual Connectivity
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Solution Overview
Problem
The challenge in wireless communications is configuring and reconfiguring data bearers efficiently in dual connectivity deployment scenarios, particularly in 5G NR networks, where existing methods lack clarity and effectiveness in managing different data bearer types and transmission modes.
Innovation Solution
A method and device for establishing or reconfiguring data bearers by receiving a request message with a data bearer identity and a bearer type indication, allowing for the creation or modification of Master Cell Group (MCG), Secondary Cell Group (SCG), MCG split, and SCG split bearers using Radio Resource Control (RRC) reconfiguration messages across multiple Radio Access Technologies (RATs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple data bearer types (MCG, SCG, MCG split, SCG split) are supported in dual connectivity scenarios, then the adaptability and versatility of the system is improved, but the device complexity and difficulty of managing different bearer types increases
Solution Approach 1:
The patent segments the data bearer management by introducing distinct bearer types (MCG, SCG, MCG split, SCG split) with specific configurations for each type. Each bearer type is associated with specific cell groups and transmission modes, allowing the system to manage complexity through structured classification while maintaining high adaptability to different dual connectivity scenarios
Solution Approach 2:
The RRC reconfiguration message structure is designed to be universal and multi-functional, capable of configuring all four data bearer types through a unified message format. The message includes flexible fields that can accommodate different bearer type requirements, enabling a single message structure to handle multiple bearer configurations without requiring separate specialized messages for each bearer type
2Reliability
If RRC reconfiguration messages are used for data bearer establishment and reconfiguration, then the reliability of control plane communication is improved, but the message complexity and information overhead increases
Solution Approach 1:
The patent employs a nested message structure where the RRC reconfiguration message contains nested information elements for data bearer configuration. The outer RRC reconfiguration message encapsulates inner data structures that define bearer-specific parameters, allowing hierarchical organization of complex configuration data while maintaining a clear message structure that reduces parsing complexity
Solution Approach 2:
The RRC reconfiguration message incorporates local quality by including bearer-type-specific configuration fields only when needed. Each bearer type (MCG, SCG, MCG split, SCG split) has targeted configuration parameters included in the message, avoiding the transmission of unnecessary information and reducing overall message complexity while maintaining comprehensive configuration capability
Data Source
AI summary
The present application provides a method for establishing/reconfiguring a data bearer that comprises receiving a request message for data bearer establishment/reconfiguration, wherein the request message comprises a data bearer identity used to identify a data bearer and a bearer type indication cell used to indicate a type of a to-be-established/reconfigured data bearer; and establishing/reconfiguring a corresponding data bearer according to the request message. The present application further provides user equipment and a base station for establishing/reconfiguring a data bearer.