Measurement Configuration Transfer for Conditional Cell Changes
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Solution Overview
Problem
In 3GPP Rel-18, the challenge of performing subsequent cell group changes in a communication network without reconfiguring or re-initiating conditional reconfigurations leads to potential misconfiguration and incorrect evaluation of measurement configurations and execution conditions due to outdated or irrelevant settings when a UE moves to a new network node.
Innovation Solution
A mechanism is introduced where a second network node generates and transmits updated measurement and condition configurations to a first network node and/or a UE, allowing the UE to maintain correct configurations during mobility procedures, such as Conditional PSCell Change (CPC), by using full or delta configurations as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the UE keeps stored conditional reconfigurations after performing a mobility procedure to a candidate target cell, then the UE can avoid reconfiguring or re-initiating conditional reconfigurations, but the measurement configurations and execution conditions become outdated or irrelevant leading to misconfiguration
Solution Approach 1:
The network node provides measurement configurations and execution conditions to the UE in advance, before the mobility procedure is completed. This allows the UE to have the correct configurations ready when it moves to the target cell, avoiding the need to store outdated configurations from the source cell.
Solution Approach 2:
The measurement configurations and execution conditions are updated dynamically based on the target cell's parameters. The network node generates new configurations specific to the target cell and provides them to the UE, ensuring the parameters remain current and relevant after mobility.
2Productivity
If the UE uses execution conditions from the source secondary node after moving to a target secondary node, then the UE can continue evaluating conditional reconfigurations, but the execution conditions may refer to wrong measurement configurations leading to incorrect evaluation
Solution Approach 1:
The network node acts as an intermediary that generates and provides the correct measurement configurations and execution conditions to the UE. This intermediary ensures that the UE receives accurate configurations from the target cell rather than using outdated configurations from the source cell.
Solution Approach 2:
The correct measurement configurations and execution conditions are provided to the UE before the mobility procedure completes. This preliminary provision ensures the UE has accurate configurations ready for evaluating conditional reconfigurations in the target cell.
Data Source
AI summary
A method performed by a second network node (13) for handling communication of a UE (10), in a communication network (1). The second network node (13) generates a measurement configuration and a related condition configuration. The second network node (13) transmits to a first network node (12) and/or the UE (10), an indication of the 5 generated measurement configuration and/or the related condition configuration.