MTC UE System Information Update via SIB Change Detection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Machine type communication (MTC) user equipment faces inefficiencies in updating system information, leading to unnecessary radio resource wastage due to repeated reception of unchanged system information, especially in poor wireless environments with limited radio resources.

Innovation Solution

A method and apparatus for MTC user equipment to selectively receive and update changed system information by using a system information (SI) count value and SI change identifier information, allowing for efficient identification and transmission of only updated SI blocks, thereby reducing unnecessary receptions and conserving radio resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If MTC user equipment repeatedly receives system information from all systems to update system information, then system information can be updated, but radio resources are unnecessarily wasted

Engineering Contradiction:

Improvesystem information update reliabilityVSAvoidradio resource consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The system information is segmented into multiple system information blocks (SIBs), each with its own change identifier. The MTC UE can selectively receive only those SIBs whose change identifiers indicate updates, rather than receiving all system information repeatedly. This segmentation allows partial updates of only changed portions while maintaining reliable system information synchronization.

Inventive Principle:

Principle #1Segmentation

2Loss of information

If MTC user equipment receives all system information blocks, then complete system information is obtained, but power consumption increases

Engineering Contradiction:

Improvesystem information completenessVSAvoidpower consumption

Core Design Contradiction:

Loss of informationVSUse of energy by moving object

Solution Approach 1:

The MTC UE performs partial reception of system information by only receiving SIBs that have changed, as indicated by comparing change identifiers. This partial action approach maintains complete and up-to-date system information while significantly reducing power consumption compared to receiving all SIBs repeatedly.

Inventive Principle:

Principle #16Partial or excessive action

3Loss of energy

If MTC user equipment receives changed system information selectively, then radio resources are conserved, but complexity of identifying changed information increases

Engineering Contradiction:

Improveradio resource efficiencyVSAvoidsystem information management complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The base station performs preliminary action by embedding change identifiers in SIB1bis before transmitting other SIBs. The MTC UE uses these pre-provided change identifiers to easily identify which SIBs have updated content, reducing the complexity of detecting changes without requiring complex comparison algorithms or additional signaling.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10356582B2Method for changing system information, and apparatus therefor

Publication Date: 2019.07.16 KT CORP

AI summary

Provided are a method and an apparatus, for changing system information by an MTC UE. The method may include receiving system information block 1bis (SIB 1bis) for the MTC UE; confirming a change in system information by using at least one from among a count value of the system information, which is included in the system information block 1bis, and system information change indicator information; and receiving at least one system information message which includes changed system information.