User Equipment Slice Frequency Cell Reselection

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Solution Overview

Problem

In mobile communication systems, efficient slice-specific cell reselection and reduced power consumption are hindered by the need to check whether the highest ranked cell supports the network slice, especially when slice support information is not transmitted by the serving cell.

Innovation Solution

The user equipment acquires slice frequency information and measures frequencies, excluding those not supported by the highest ranked cell from the target of slice-specific cell reselection, thereby optimizing the cell reselection process and reducing power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the user equipment checks whether the highest ranked cell supports the network slice for each frequency, then the reliability of slice-specific cell reselection is improved, but the power consumption and processing time increase

Engineering Contradiction:

Improvereliability of slice-specific cell reselectionVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The base station performs preliminary action by transmitting slice support information in advance before the cell reselection process. This allows the user equipment to acquire the necessary information about which cells support which network slices beforehand, eliminating the need for real-time checking during cell reselection and thus reducing power consumption while maintaining reliability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The base station acts as an intermediary that provides slice support information to the user equipment. Instead of the user equipment directly checking slice support status through complex measurements, the base station mediates by providing pre-processed information about cell slice support capabilities, simplifying the user equipment's task and reducing energy consumption

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

Engineering Contradiction:

Improvereliability of slice-specific cell reselectionVSAvoidprocessing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The base station creates a copy of slice support information and transmits it to the user equipment. This copied information allows the user equipment to make cell reselection decisions without performing time-consuming direct verification, effectively copying the verification work beforehand to speed up the actual cell reselection process

Inventive Principle:

Principle #26Copying

3Device complexity

If slice support information is not transmitted by the serving cell, then the device complexity is reduced, but the ease of operation for slice-specific cell reselection deteriorates

Engineering Contradiction:

Improvedevice complexityVSAvoidease of operation for slice-specific cell reselection

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

Inventive Principle:

Principle #24Intermediary (Mediator)

4Measurement precision

If the user equipment measures all frequencies and checks slice support, then the measurement precision is improved, but the use of energy increases

Engineering Contradiction:

Improvemeasurement precision of frequencyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20240406824A1Cell reselection method

Publication Date: 2024.12.05 KYOCERA CORP

AI summary

In a first aspect, a cell reselection method is performed in a mobile communication system. The cell reselection method includes acquiring, by a user equipment, slice frequency information indicating a correspondence relationship between a network slice, a frequency, and a frequency priority from a network node. The cell reselection method includes measuring, by the user equipment, the frequency. In addition, the cell reselection method includes: excluding, by the user equipment, the frequency in the network slice from a target of slice-specific cell reselection as a result of measuring the frequency, when a highest ranked cell in the frequency does not support the network slice. In addition, the cell reselection method includes performing, by the user equipment, the slice-specific cell reselection.