UE Cell Selection Using Slice-Supported Frequencies
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Solution Overview
Problem
User Equipment (UE) may fail to support service continuity due to not considering network slice requirements during cell selection or reselection, leading to network rejection and inefficient cell reselection procedures.
Innovation Solution
A wireless device configures multiple network slices, receives network slice information, determines frequencies supporting these slices, and performs cell selection or reselection based on this information to ensure support for the necessary network slice.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE performs cell selection based on only frequency priority and cell quality without considering network slice, then the cell selection procedure is simple and fast, but the UE cannot support service continuity and may receive network rejection
Solution Approach 1:
The UE performs preliminary actions by pre-configuring multiple network slices and their associated frequencies before cell selection. The UE stores network slice information and determines which frequencies support the required network slices in advance, so that during cell selection, the UE can directly use this pre-determined information to filter suitable cells, avoiding complex real-time analysis and ensuring service continuity without significant procedure complexity increase
2Reliability
If UE performs cell reselection to find another cell supporting network slice, then service continuity can be maintained, but the cell reselection procedure becomes inefficient and time-consuming
Solution Approach 1:
The UE performs preliminary determination of which frequencies support the required network slices by using pre-configured network slice information. This pre-determination allows the UE to quickly identify suitable cells during reselection without performing complex real-time analysis, significantly reducing cell reselection time while maintaining service continuity
Solution Approach 2:
The UE uses feedback from network slice information to guide the cell reselection process. By considering network slice requirements and using frequency information that indicates network slice support, the UE can efficiently identify suitable cells and avoid unnecessary reselection attempts, reducing the time and effort required for cell reselection
3Productivity
If UE does not consider network slice information during cell selection, then the selection process is fast and simple, but the UE may select cells that do not support the required network slice leading to service disruption
Solution Approach 1:
The UE performs preliminary determination of network slice-supported frequencies using pre-configured network slice information. This allows the UE to efficiently filter cells during selection by directly using the pre-determined frequency list, maintaining both high selection efficiency and reliable network slice support without requiring complex real-time analysis
Data Source
AI summary
A method and apparatus for a cell selection or a cell reselection considering a network slice in a wireless communication system is described. A wireless device configures multiple network slices. A wireless device receives a network slice information related to the multiple network slices. A wireless device establishes a PDU session for a specific service. A wireless device determines one or more frequencies that support the at least one network slice, used by the PDU session, from among the multiple network slices based on the frequency information. A wireless device performs a cell selection procedure and/or a cell reselection procedure based on the determined one or more frequencies.