Dynamic Cell Reselection Priority Assignment Based on Performance Triggers
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Solution Overview
Problem
Conventional cell reselection priorities in cellular networks are static, leading to user equipment (UE) remaining camped on cells or layers with high default priorities even when they experience performance issues, which can degrade user experience.
Innovation Solution
The system dynamically assigns cell reselection priorities to radio cells experiencing performance degradation by downgrading the default System Information Block (SIB) priorities based on the severity of the degradation, allowing UEs to deprioritize layers with poor performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static cell reselection priorities are used, then network configuration simplicity is maintained, but user equipment remains camped on cells with poor performance even when they have high default priorities
Solution Approach 1:
The patent implements dynamic cell reselection priorities that automatically adjust based on real-time cell performance measurements. The network node monitors performance metrics and dynamically updates priority values assigned to cells, allowing the system to adapt to changing conditions rather than relying on static pre-configured priorities. This resolves the contradiction by making the priority mechanism flexible and responsive to actual cell quality.
Solution Approach 2:
The system establishes a feedback loop where cell performance is continuously measured and fed back to the network node, which then adjusts reselection priorities accordingly. This closed-loop control ensures that cells with degraded performance automatically receive lower priorities, preventing UEs from camping on poor-quality cells while maintaining simple operation for end users through automated adjustments.
2Reliability
If dynamic priority adjustment is implemented, then UEs can avoid cells with performance degradation, but the network configuration and management becomes more complex
Solution Approach 1:
The network node automatically performs performance monitoring and priority adjustment without requiring manual intervention or complex configuration. The system serves itself by autonomously detecting cell performance issues and adjusting reselection priorities to maintain optimal user experience, thereby avoiding the need for complex manual configuration while achieving reliable performance-based cell selection.
Solution Approach 2:
The patent changes the priority parameter dynamically based on measured cell performance metrics. Instead of fixed priority values, the system adjusts priority parameters in real-time according to actual cell conditions, allowing UEs to automatically avoid degraded cells while keeping the configuration management simple through automated parameter adaptation.
3Productivity
If default high priorities are assigned to certain layers, then UEs preferentially select those layers, but performance degradation on those layers cannot be addressed
Solution Approach 1:
The patent makes layer priorities dynamic rather than static, allowing the system to maintain high productivity by efficiently selecting layers while adapting to performance changes. When performance degradation is detected on a high-priority layer, the system automatically adjusts the priority values to redirect UE selection toward healthier layers, thus maintaining both selection efficiency and performance adaptability.
Solution Approach 2:
The system changes priority parameters based on actual layer performance conditions. Default high priorities provide efficient initial layer selection, but the system automatically adjusts these parameters when performance degradation occurs, enabling UEs to adaptively select alternative layers while maintaining efficient connection establishment through the dynamic parameter updates.
Data Source
AI summary
The disclosed technology provides systems and methods for dynamically assigning cell reselection priorities (e.g., system information block (SIB) priorities) to different layers (e.g., different frequency bands or different radio access technologies (RATs)) for radio cells experiencing performance degradation. In some implementations, default SIB priorities of degraded layers are downgraded based on the severity of the performance degradation, for example, set to the lowest variable SIB priority for critical performance degradations. The adjusted SIB priorities are broadcast to user equipment (UE) to allow the UEs to perform cell reselection based on the adjusted SIB priorities. When the performance degradation is resolved, the SIB priorities revert to the default SIB priorities.