5G Cell Reselection with Slice Priority Evaluation
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Solution Overview
Problem
Current 5G mobile communication systems face challenges in performing efficient cell reselection with slices, particularly when the best or highest ranked cell does not support the highest priority slice, leading to potential suboptimal cell reselection.
Innovation Solution
The proposed method involves evaluating cell reselection criteria based on relative reselection priorities derived from slice priorities, re-evaluating these criteria when a best or highest ranked cell does not support the highest priority slice, and considering legacy priorities in such cases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell reselection is performed based on highest priority slice, then slice service quality is improved, but cell reselection may fail when best cell does not support the slice
Solution Approach 1:
The UE performs preliminary evaluation of cell reselection criteria to determine whether the best or highest ranked cell supports the highest priority slice before finalizing reselection. This advance check prevents failed reselection attempts and allows the UE to proactively select alternative cells that do support the required slice.
Solution Approach 2:
The system implements a feedback mechanism where the UE continuously monitors slice support status in target cells during the reselection process. Based on this feedback, the UE can dynamically adjust its reselection decisions, re-evaluating criteria when the best cell does not support the highest priority slice, ensuring reliable slice service availability.
2Adaptability or versatility
If cell reselection evaluates slice support status, then slice awareness is improved, but reselection complexity increases
Solution Approach 1:
The cell reselection process is segmented into distinct evaluation stages: initial cell ranking based on signal quality, followed by slice support verification, and finally criteria re-evaluation if needed. This segmentation allows slice awareness to be integrated without completely redesigning the reselection process, managing complexity through structured phases.
Solution Approach 2:
Slice support evaluation is applied locally only when needed - specifically when the best or highest ranked cell does not support the highest priority slice. Rather than evaluating slice support for all cells universally, the enhanced evaluation is triggered selectively based on local conditions, reducing overall process complexity while maintaining necessary adaptability.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein disclose methods for handling a slice based cell reselection in a wireless network (1000) by a UE (100). The method includes evaluating a cell reselection criteria based on a relative reselection priority between frequencies derived using a slice priority of at least one slice group supported on a frequency. The at least one slice group comprises a highest priority slice group supported by the frequency as an input. Further, the method includes determining a change in the relative reselection priority upon detecting that a best cell or a highest ranked cell in the frequency does not support the at least one slice group associated with a highest priority. Further, the method includes re-evaluating the cell reselection criteria based on the determined changed in the relative reselection priority.