Radio Base Station PSCell Configuration for Multi-Node Dual Connectivity

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Solution Overview

Problem

Existing 3GPP specifications for conditional PSCell addition/change in Multi-RAT Dual Connectivity (MR-DC) are limited, as they allow only one PSCell configuration, making it difficult to efficiently manage multiple secondary cells.

Innovation Solution

A radio base station and communication system that receives and processes configuration information from multiple secondary nodes, enabling the execution of conditional PSCell addition/change procedures by generating and managing multiple PSCell configurations based on received execution conditions and identification information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the existing CG-Config is used for conditional PSCell addition/change, then the procedure is simple, but only one PSCell can be configured

Engineering Contradiction:

Improvenumber of PSCell configurationsVSAvoidconfiguration management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the configuration management by introducing separate information elements for each PSCell configuration (condSCG-CellGroupConfigToAddModList, condSCG-RB-ConfigToAddModList). Each configuration is independently managed with its own execution condition, allowing multiple PSCells to be configured while maintaining clear organizational structure and reducing management complexity.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If multiple PSCell configurations are supported, then the adaptability increases, but the configuration management becomes more complex

Engineering Contradiction:

Improvemulti-PSCell configuration capabilityVSAvoidconfiguration processing ease

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent applies preliminary action by pre-configuring multiple PSCell configurations with their execution conditions before actual PSCell addition/change occurs. The MN receives and stores multiple condSCG-CellGroupConfig and condSCG-RB-Config sets from the T-SN, each associated with specific execution conditions (condExecutionCond). When conditions are met, the appropriate pre-configured PSCell can be activated without complex real-time configuration processing.

Inventive Principle:

Principle #10Preliminary action

3Loss of information

If the existing SN Addition Request Ack procedure is used, then the signaling is simple, but it cannot convey multiple PSCell configurations

Engineering Contradiction:

Improveconfiguration information completenessVSAvoidsignaling structure complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The patent implements nesting by embedding multiple PSCell configuration sets within the existing SN Addition Request Ack signaling structure. The condSCG-CellGroupConfigToAddModList and condSCG-RB-ConfigToAddModList information elements are nested within the CG-Config, which itself is part of the SN Addition Request Ack message. This allows multiple configurations to be conveyed through the existing signaling framework without creating a completely new complex signaling structure.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS12538190B2Radio base station, radio communication system, and radio communication method

Publication Date: 2026.01.27 NTT DOCOMO INC

AI summary

A radio base station (MN) receives the configuration information related to the secondary cell group and executes the conditional adding/modifying procedure of the secondary cell based on the received configuration information. The radio base station receives configuration information including execution condition of a secondary cell group and identification information of a secondary cell from a plurality of secondary nodes.