Conditional PSCell Change Measurement Alignment in Dual Connectivity
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Solution Overview
Problem
In inter-SN Conditional PSCell Change scenarios, there is a mismatch between network and UE configurations due to the MN generating CPC configurations without SN-determined conditions, leading to potential misalignment and unexpected PSCell Change execution times.
Innovation Solution
A method where the Source SN provides a CPC-related measConfig in an RRC container to the MN, allowing the MN to generate a CPC configuration in MN format, ensuring alignment between network and UE configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the MN generates CPC configurations without SN-determined conditions, then the CPC configuration can be generated and transmitted to the UE, but a mismatch between network and UE configurations occurs leading to unexpected PSCell Change execution times
Solution Approach 1:
The SN acts as an intermediary that provides measurement configuration (measConfig) to the MN. The SN-determined measConfig is transmitted to the UE through the MN, ensuring that the measurement conditions are established by the SN while the MN handles the configuration transmission. This intermediary role resolves the contradiction by separating the configuration generation (MN) from the configuration determination (SN).
Solution Approach 2:
The SN determines and provides the measConfig before the MN generates the CPC configuration. This preliminary action ensures that the measurement conditions are established in advance, allowing the MN to generate consistent CPC configurations that align with the SN's measurement requirements, preventing configuration mismatches.
2Reliability
If the SN provides CPC-related measConfig to the MN, then configuration alignment between network and UE is ensured, but the complexity of the configuration process increases
Solution Approach 1:
The SN-provided measConfig is merged into the MN-generated CPC configuration. The MN combines the SN's measurement configuration with its own CPC configuration generation, creating a unified configuration that is transmitted to the UE. This merging approach ensures alignment while consolidating the configuration process into a single coordinated action.
3Productivity
If the UE executes PSCell Change based on MN-generated configuration without SN-determined conditions, then the PSCell Change can be executed, but SCG failures may occur due to misalignment
Solution Approach 1:
The SN provides feedback in the form of measConfig to the MN, which then generates the CPC configuration. This feedback mechanism ensures that the PSCell Change execution conditions are determined by the SN based on actual measurement requirements, preventing misalignment and SCG failures while maintaining execution speed.
Data Source
AI summary
A method (700) performed by a UE (401). The method includes receiving (s702) from a MN (402) a first RRC reconfiguration message (RRCReconfiguration). The RRCReconfiguration message comprises: i) a second RRC reconfiguration message, RRCReconfiguration***, generated by an S-SN (403), wherein the RRCReconfiguration*** message comprises a measurement configuration; and ii) a conditional reconfiguration IE (e.g., ConditionalReconfiguration IE) generated by the MN, wherein the conditional reconfiguration IE contains at least a first measurement ID that the MN obtained from S-SN, and the first measurement ID is associated with the measurement configuration.