Cell Reselection Using Network Slice and Frequency Priority

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Solution Overview

Problem

In 5G systems, cell reselection based solely on channel quality can affect service transmission and user experience, particularly when network slicing requirements are not considered.

Innovation Solution

The terminal device performs cell reselection using network slice information, frequency point priority information, and channel quality information to ensure the selected cell meets the network slicing requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If cell reselection is performed based on channel quality criteria, then channel quality is improved, but network slice service transmission is affected

Engineering Contradiction:

Improvechannel qualityVSAvoidservice transmission

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent changes the cell reselection parameters from solely channel quality-based to a multi-parameter system that includes network slice information, frequency point priority, and channel quality. This allows the system to consider both service requirements and channel conditions when selecting cells, resolving the contradiction between optimizing channel quality and ensuring reliable service transmission.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent segments the cell reselection process into multiple evaluation dimensions: network slice compatibility assessment, frequency point priority evaluation, and channel quality measurement. By dividing the reselection criteria into separate evaluable components, the system can balance between service transmission reliability and channel quality optimization.

Inventive Principle:

Principle #1Segmentation

2Reliability

If cell reselection considers network slice information, then service transmission reliability is improved, but reselection complexity increases

Engineering Contradiction:

Improveservice transmissionVSAvoidreselection process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by having the network device pre-configure and send frequency point priority information and network slice information to the terminal device before cell reselection is needed. This allows the terminal to perform reselection based on pre-provided criteria, reducing the complexity of real-time decision-making while ensuring service transmission reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces frequency point priority information as an intermediary parameter that mediates between network slice requirements and channel quality. This intermediary helps simplify the reselection process by providing a prioritization framework that the terminal can follow without needing to perform complex real-time evaluations of all possible cells.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12556991B2Cell reselection method, terminal device, and network device

Publication Date: 2026.02.17 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

A method for cell reselection includes: performing, by a terminal device, cell reselection according to first information; where the first information includes at least one of: network slice information of the terminal device, frequency point priority information, and channel quality information of at least one cell, the frequency point priority information is used for indicating priority information of a frequency point or a cell, and the at least one cell comprises a serving cell and/or a neighboring cell of the terminal device.