Slice-Specific Cell Reselection Frequency Priority Adjustment

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Solution Overview

Problem

Current wireless communication systems face challenges in efficiently managing slice-specific cell reselection, leading to potential service rejection and delays due to misconfigured frequency priorities.

Innovation Solution

A method where user devices receive slice-specific cell reselection information, including slice group-specific frequency priorities, perform slice-specific cell reselection procedures, log relevant information, and transmit it to network nodes to adjust frequency priorities for improved network performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If slice group specific frequency priorities are configured for cell reselection, then network slice service quality is improved, but device complexity and configuration complexity increase

Engineering Contradiction:

Improvenetwork slice service qualityVSAvoidconfiguration complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the cell reselection process by introducing slice group specific frequency priorities that are separate from general frequency priorities. This segmentation allows the network to provide differentiated reselection guidance for different network slice groups (e.g., enhanced mobile broadband, ultra-reliable low-latency communications, massive machine type communications) without complicating the overall system architecture. Each slice group can have its own frequency priority configuration, enabling targeted optimization while maintaining modular complexity management.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The network node performs preliminary configuration by providing slice group specific frequency priorities to the user device before the cell reselection procedure occurs. This advance configuration allows the user device to have ready-to-use reselection parameters for different slice groups, eliminating the need for complex real-time calculations or negotiations during the reselection process itself, thereby reducing operational complexity while maintaining service quality.

Inventive Principle:

Principle #10Preliminary action

2Loss of time

If slice specific cell reselection procedures are implemented, then service initiation delays are reduced, but information processing requirements and device complexity increase

Engineering Contradiction:

Improveservice initiation delaysVSAvoidinformation processing requirements

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The network node provides slice group specific frequency priorities in advance to the user device, enabling the device to perform slice-specific cell reselection without complex real-time processing. The user device can directly apply these pre-configured priorities when evaluating candidate cells for different network slices, significantly reducing service initiation delays while keeping device processing requirements manageable.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements a feedback mechanism where the network node receives cell reselection reports from user devices and uses this information to adjust and optimize slice group specific frequency priorities. This feedback loop enables continuous improvement of reselection performance without requiring increasing device complexity, as the optimization intelligence is gradually shifted to the network side based on accumulated operational data.

Inventive Principle:

Principle #23Feedback

3Productivity

If frequency priorities are adjusted based on reselection reports, then network performance is enhanced, but signaling overhead and network complexity increase

Engineering Contradiction:

Improvenetwork performanceVSAvoidsignaling overhead

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The system implements partial feedback by having user devices report cell reselection information selectively rather than providing complete detailed logs. The network node adjusts slice group specific frequency priorities based on this partial information, which is sufficient for optimization purposes. This approach enhances network performance through data-driven adjustments while avoiding the signaling overhead associated with comprehensive reporting of all reselection parameters and intermediate states.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20250119805A1Slice specific cell re-selection frequency priority for wireless networks

Publication Date: 2025.04.10 NOKIA TECHNOLOGIES OY

AI summary

A method includes receiving, by a user device, slice specific cell reselection information including slice group specific frequency priorities for one or more slice groups, wherein each slice group is associated with one or more network slices; performing, by the user device, a slice specific cell reselection procedure based on the slice specific cell reselection information; during the performing of the cell reselection procedure, logging, by the user device, information related to the slice specific cell reselection procedure; and transmitting, by the user device to a network node, the information related to the slice specific cell reselection procedure to enable setting or adjusting the slice group specific frequency priorities for one or more slice groups for one or more cells.