UE Cell Configuration Switching to Prevent Mobility Fallback
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Solution Overview
Problem
In wireless communications, improper fallback to serving cell configurations can occur during mobility from a source cell to a target cell, leading to inefficiencies and potential disruptions.
Innovation Solution
A method and apparatus for cell configuration switching in wireless communication systems, where a user equipment (UE) receives a list of cell configurations for multiple candidate cells, performs mobility to a target cell based on a specific configuration, and updates the list based on control information received from the network, enabling selective switching and preventing improper fallback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the UE automatically falls back to source cell configuration after mobility, then the mobility procedure is simplified, but improper fallback occurs leading to service disruptions
Solution Approach 1:
The patent implements dynamic configuration switching where the UE can transition between source cell configuration and target cell configuration based on real-time mobility state and network conditions. The configuration is not static but adapts during mobility procedures, allowing the UE to switch configurations dynamically rather than automatically falling back, thus maintaining service continuity while simplifying the mobility procedure.
2Adaptability or versatility
If the UE maintains multiple cell configurations, then flexibility for subsequent mobility is improved, but device complexity increases
Solution Approach 1:
The patent segments the cell configuration into multiple independent configuration sets, each associated with different candidate cells. Instead of managing one large complex configuration, the UE manages separate configuration segments that can be independently activated. This segmentation reduces the complexity of configuration management while maintaining the flexibility to switch between different cell configurations during mobility.
3Measurement precision
If the UE performs measurements on all candidate cells, then mobility selection accuracy is improved, but measurement overhead and power consumption increase
Solution Approach 1:
The patent applies partial action by having the UE perform measurements only on a subset of candidate cells rather than all possible cells. The UE prioritizes measurements on cells that are more likely to be target cells based on previous mobility patterns, network indications, and signal conditions. This partial measurement approach maintains sufficient mobility selection accuracy while significantly reducing power consumption and measurement overhead.
Data Source
AI summary
The present disclosure relates to cell configuration switching in wireless communications. According to an embodiment of the present disclosure, a method performed by a user equipment (UE) in a wireless communication system comprises: receiving, from a network via a source cell, a list of cell configurations for multiple candidate cells; performing a mobility from the source cell to a first target cell among the multiple candidate cells based on applying a cell configuration for the first target cell; after performing the mobility to the first target cell, determining whether to update the list by storing a cell configuration for the source cell in the list based on first control information received from the network; and performing measurements for a subsequent mobility based on the updated list.