Cell Reselection Using Network Slice Information
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Solution Overview
Problem
During cell reselection, UE may end up in a cell that does not provide the best signal quality or support the necessary network slice, leading to suboptimal service quality.
Innovation Solution
A method and device for cell reselection that determines a candidate cell based on signal quality and slice information, prioritizing cells that support the required network slices and offer better signal quality, ensuring the UE resides in a cell that provides improved service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If UE performs cell reselection based merely on signal quality, then cell reselection is simple, but the UE may end up in a cell that does not support the necessary network slice
Solution Approach 1:
The network pre-configures slice-specific reselection parameters (S-resellThreshold, S-resellOffset, T-resell) for each network slice in the UE. During cell reselection, the UE retrieves these pre-configured parameters and applies them to evaluate candidate cells, determining whether to reselect based on whether the candidate cell supports the required slice and meets the slice-specific thresholds. This preliminary configuration enables the UE to make informed reselection decisions without complex real-time negotiations.
2Speed
If UE performs cell reselection based merely on signal quality, then the reselection process is fast, but the service quality may be suboptimal
Solution Approach 1:
The cell reselection process is segmented into distinct evaluation stages: first, the UE identifies candidate cells based on basic signal quality thresholds; second, the UE checks whether candidate cells support the required network slice; third, the UE applies slice-specific reselection parameters to determine the final reselection decision. This segmentation allows the UE to efficiently filter cells at each stage without performing complete evaluations on all cells, maintaining speed while improving service quality.
3Reliability
If the network provides slice-specific reselection parameters for each slice, then the service quality is improved, but the signaling overhead increases
Solution Approach 1:
The network configures a single set of slice-specific reselection parameters (S-resellThreshold, S-resellOffset, T-resell) that serve multiple network slices simultaneously. When the UE needs to reselect for any supported slice, it uses this universal parameter set rather than receiving separate parameters for each slice. This multi-functional approach significantly reduces signaling overhead while still enabling slice-aware reselection decisions.
Data Source
AI summary
A cell reselection method, and including: determining a candidate cell; determining a target cell of the UE according to slice information supported by the candidate cell; and performing cell reselection according to the target cell.