Terminal Cell Selection Using NPN Information

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Solution Overview

Problem

In 5G mobile communication systems, User Equipment (UE) lacks the ability to distinguish between Public and Non-Public Network (NPN) cells during cell selection or reselection, leading to unnecessary resource wastage and power consumption due to frequent reselections.

Innovation Solution

Implementing a method and apparatus for cell selection or reselection based on NPN-related information, allowing terminals to determine appropriate cells or frequencies supporting NPN, thereby optimizing selection and reselection processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the UE performs cell selection or reselection without NPN information, then the cell selection process is simple, but the UE frequently reselects cells and wastes computing resources and power

Engineering Contradiction:

Improvecell selection process complexityVSAvoidterminal power consumption

Core Design Contradiction:

Device complexityVSLoss of energy

Solution Approach 1:

The network side performs preliminary action by indicating NPN information in system information before the UE performs cell selection or reselection. This allows the UE to identify NPN cells in advance and avoid frequent reselection, thereby reducing power consumption and computing resource waste without complicating the cell selection process

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If the UE uses existing cell selection procedures without NPN awareness, then the procedures are straightforward, but the UE cannot distinguish NPN cells and must reselect frequently

Engineering Contradiction:

Improvecell selection procedure simplicityVSAvoidcell selection efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

NPN information acts as an intermediary element introduced into the cell selection procedure. The network side indicates NPN information through system information, enabling the UE to distinguish NPN cells while maintaining the overall simplicity of the selection procedure. This intermediary information allows the UE to make informed selection decisions and avoid frequent reselection, thereby improving cell selection efficiency

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If the UE resides in an NPN cell without knowing it is an NPN cell, then the UE can initially access the cell, but the UE will reselect immediately wasting computing resources

Engineering Contradiction:

ImproveUE cell access capabilityVSAvoidcomputing resource wastage

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The network side provides preliminary action by indicating NPN information in system information before the UE completes cell selection. This allows the UE to identify NPN cells in advance, make informed access decisions based on its NPN support capability, and avoid immediate reselection. Consequently, the UE can access appropriate cells without wasting computing resources on futile reselection attempts

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11582664B2Cell selection or reselection method and apparatus, and terminal

Publication Date: 2023.02.14 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Provided in embodiments of the disclosure are a method and apparatus for cell selection or reselection, and a terminal. The method includes that: a terminal performs cell selection or cell reselection based on first information, the first information being Non-Public Network (NPN) related information.