NB-IoT System Information Acquisition Optimization

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Solution Overview

Problem

Conventional LTE systems are expensive and inefficient for IoT communication, particularly in acquiring system information quickly, as they were designed for high-speed data communication, leading to delays in acquiring SIB 1-NB and MIB-NB in NB-IoT systems.

Innovation Solution

A method is introduced to rapidly transmit and receive additional SIB 1-NB and MIB-NB signals between user equipment and base stations, optimizing their transmission patterns and scheduling to reduce acquisition time and improve decoding performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If conventional LTE system is used for IoT communication, then high-speed data communication is supported, but acquisition time of system information (SIB 1-NB and MIB-NB) is delayed and communication cost increases

Engineering Contradiction:

Improvedata communication speedVSAvoidsystem information acquisition time

Core Design Contradiction:

SpeedVSLoss of time

Solution Approach 1:

The base station transmits additional SIB 1-NB before the UE needs to acquire system information, and transmits MIB-NB multiple times in advance. This preliminary transmission allows the UE to obtain system information faster when it needs to connect, resolving the contradiction between maintaining conventional LTE structure and reducing acquisition time

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If conventional LTE system is used for IoT communication, then existing infrastructure is utilized, but communication cost becomes expensive and efficiency decreases

Engineering Contradiction:

Improveinfrastructure compatibilityVSAvoidcommunication efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The system segments the SIB 1-NB transmission into multiple instances: the original SIB 1-NB and an additional SIB 1-NB. This segmentation allows the UE to acquire system information from either source, improving communication efficiency while maintaining compatibility with existing LTE infrastructure

Inventive Principle:

Principle #1Segmentation

3Loss of time

If additional SIB 1-NB is transmitted to reduce acquisition time, then system information is obtained rapidly, but transmission resources are consumed

Engineering Contradiction:

Improvesystem information acquisition timeVSAvoidtransmission energy consumption

Core Design Contradiction:

Loss of timeVSUse of energy by moving object

Solution Approach 1:

The base station transmits additional SIB 1-NB only partially - specifically in subframes where SIB 1-NB is not transmitted or where NPSS/NSSS are not present. This partial transmission reduces acquisition time for UEs that need it while avoiding excessive use of transmission resources

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP3514992B1Method for transceiving signal by terminal and base station in wireless communication system and device supporting same

Publication Date: 2024.08.07 LG ELECTRONICS INC

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Figure 2(a)~2(b)
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AI summary

Various embodiments provide a method for transceiving a signal by a terminal and a base station in a wireless communication system and a device supporting same.