Conditional Cell Configuration Reuse for Faster Dual Connectivity
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Solution Overview
Problem
Existing dual connectivity operations in radio access networks experience delays and increased signaling overhead due to the need for repeated configuration and preparation of conditional PSCell addition or change procedures, particularly after successful or unsuccessful conditional PSCell operations.
Innovation Solution
The user equipment and master node provide conversion information to reuse and update configurations from a first conditional cell operation for a subsequent second conditional cell operation, reducing the need for complete release and reconfiguration of candidate secondary nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the UE releases configuration of candidate PSCells after a successful CPA, then the system avoids storing unused configurations, but subsequent CPC operations require complete reconfiguration causing delay and increased signaling overhead
Solution Approach 1:
The patent applies discarding and recovering by selectively releasing only the configuration of the selected PSCell after CPA, while retaining configurations of other candidate PSCells. This allows the system to discard unused configurations to save resources while recovering the ability to quickly reuse retained configurations for subsequent CPC operations, thereby reducing delay and signaling overhead.
2Reliability
If the UE releases entire SCG configuration and related UE context after SN release, then the system cleanses all prepared PSCells, but subsequent SN addition requires complete re-initiation causing delay and signaling overhead
Solution Approach 1:
The patent applies segmentation by dividing the SCG configuration into individual PSCell configurations that can be independently managed. Instead of releasing the entire SCG configuration as a unit, the system can selectively release only the source PSCell configuration while retaining other candidate PSCell configurations, enabling faster subsequent SN addition operations.
Solution Approach 2:
The patent applies preliminary action by preparing and retaining configurations of candidate PSCells in advance during the CPA procedure. These pre-prepared configurations can be directly reused for subsequent CPC operations or SN addition without requiring complete re-initiation, thereby reducing delay while maintaining system state cleanliness through selective release mechanisms.
3Manufacturing precision
If the UE re-initiates CPA procedure after successful CPA, then the system ensures proper configuration setup, but the process causes increased signaling overhead and delay
Solution Approach 1:
The patent applies partial action by performing only the necessary configuration changes required for the next operation rather than re-initiating the complete CPA procedure. The system retains sufficient configuration information to proceed with CPC operations or SN addition using partial reconfiguration, thereby reducing signaling overhead while maintaining configuration correctness through targeted updates rather than complete re-setup.
Data Source
AI summary
The disclosure inter alia relates to a user equipment configured to support dual connectivity operation towards a master node and a secondary node of a radio access network, the user equipment comprising at least one processor and at least one memory, the at least one memory storing instructions that, when executed by the at least one processor, cause the user equipment to obtain, from the master node, conversion information configuring the user equipment to at least in part re-use a configuration pertaining to a first conditional cell operation regarding one or more secondary nodes for a subsequent second conditional cell operation regarding the one or more secondary nodes.