PSCell Change Reporting Under SCG Deactivation Conditions
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Solution Overview
Problem
The challenge of implementing PSCell change information reporting in a scenario where a secondary cell group (SCG) is deactivated in a next-generation radio access (NR) system with dual connectivity is not adequately addressed by existing technologies, leading to inefficiencies in network optimization and mobility robustness.
Innovation Solution
A method for user equipment (UE) to determine and record PSCell change information based on specific conditions, such as SCG deactivation or random access procedures, ensuring efficient reporting of successful PSCell change events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PSCell change information reporting is implemented in SCG deactivation scenario, then network optimization capability is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent applies local quality by making the SPCR determination conditional on specific scenarios. The UE only performs SPCR determination when the RRC message does not include SCG deactivation indication and when random access is triggered, rather than universally. This selective approach improves network optimization capability where needed while avoiding unnecessary complexity in scenarios where reporting is not beneficial.
Solution Approach 2:
The patent implements dynamics by making the SPCR reporting mechanism adaptive to different RRC message types and scenarios. The determination of whether to perform SPCR is dynamically adjusted based on the presence of SCG deactivation indication and random access triggering conditions, allowing the system to optimize between reporting completeness and complexity management.
2Measurement precision
If SPCR determination is performed after every PSCell change, then reporting accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent applies partial action by performing SPCR determination only under specific conditions rather than after every PSCell change. The UE checks whether the RRC message includes SCG deactivation indication and whether random access is triggered, performing reporting only when these conditions are met. This selective approach maintains reporting accuracy for critical scenarios while reducing energy consumption by avoiding unnecessary determinations in other scenarios.
3Reliability
If SPCR reporting is performed when SCG is deactivated, then mobility robustness is improved, but signaling overhead increases
Solution Approach 1:
The patent applies local quality by restricting SPCR reporting to specific local scenarios rather than universally. The UE determines whether to report based on the specific characteristics of the RRC message (presence of SCG deactivation indication) and the random access triggering status. This ensures mobility robustness is maintained in critical scenarios while avoiding unnecessary signaling overhead in scenarios where reporting would not contribute to robustness.
Data Source
AI summary
According to the present invention, provided is a method performed by a user equipment (UE), including: receiving a radio resource control (RRC) message, i.e., a primary secondary cell group cell (PSCell) change command, including reconfiguration with sync for a secondary cell group (SCG); determining whether the RRC message includes an indication of SCG deactivation; and if the RRC message does not include an indication of SCG deactivation, performing a successful PSCell change report (SPCR) determination operation upon successfully completing random access triggered by the reconfiguration with sync for the SCG.