5G System Information Segmentation for UE Campability

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Solution Overview

Problem

In 5G NR wireless communication systems, there is no standard method for user equipment (UE) to determine whether a cell is campable or to acquire system information (SI), leading to power consumption and time delays in cell selection, as not all cells broadcast entire SI and the periodicity or on-demand nature of SI is unclear.

Innovation Solution

The method involves broadcasting essential minimum SI with fixed scheduling information on a downlink broadcast channel, including availability information for non-essential minimum SI, allowing UE to dynamically acquire non-essential SI on a downlink shared channel and determine campability based on this information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If system information is broadcasted on all cells including non-standalone cells, then system information coverage is improved, but power consumption and time delay increase for UE in cell selection

Engineering Contradiction:

Improvesystem information coverageVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent segments system information into two categories: minimum system information (broadcast on all cells including non-standalone cells) and other system information (broadcast only on standalone cells). This segmentation allows UE to obtain essential campability determination information from minimum SI without needing to process or wait for complete system information on all cells, thereby reducing power consumption during cell selection while maintaining reliable system information coverage.

Inventive Principle:

Principle #1Segmentation

2Reliability

If system information is broadcasted on all cells including non-standalone cells, then system information coverage is improved, but time delay in cell selection increases

Engineering Contradiction:

Improvesystem information coverageVSAvoidtime delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent segments system information into minimum system information (broadcast on all cells) and other system information (broadcast only on standalone cells). UE can determine campability based on minimum SI received from all cells without waiting for complete system information, significantly reducing cell selection time delay while maintaining reliable system information coverage through selective broadcasting of other SI on campable cells.

Inventive Principle:

Principle #1Segmentation

3Loss of information

If complete system information is broadcasted on each cell, then information completeness is improved, but transmission resource overhead increases

Engineering Contradiction:

Improveinformation completenessVSAvoidtransmission resource overhead

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The patent segments system information into minimum system information (broadcast on all cells) and other system information (broadcast only on standalone cells). This ensures information completeness for campability determination through minimum SI while reducing transmission resource overhead by avoiding redundant broadcasting of other SI on non-standalone cells where it is not needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent extracts and separates minimum system information from other system information. Minimum SI is extracted and broadcast on all cells including non-standalone cells, while other SI is extracted and broadcast only on standalone cells. This extraction approach ensures necessary information completeness for cell selection while minimizing transmission resource overhead by broadcasting only essential information on each cell type.

Inventive Principle:

Principle #2Taking out (Extraction)

4Productivity

If system information is dynamically scheduled, then resource efficiency is improved, but complexity of acquiring and processing information increases for UE

Engineering Contradiction:

Improveresource efficiencyVSAvoidinformation acquisition complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments system information into minimum system information (fixed scheduling on all cells) and other system information (dynamic scheduling on standalone cells). Minimum SI uses fixed scheduling to simplify UE acquisition and processing for campability determination, while other SI uses dynamic scheduling on standalone cells to improve resource efficiency. This segmentation allows UE to handle fixed-scheduled minimum SI with simple procedures while resource efficiency is improved through dynamic scheduling of other SI where applicable.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12041532B2Method of system information transmission and acquisition

Publication Date: 2024.07.16 ACER INC

AI summary

A method of system information transmission for a network in a wireless communication system is disclosed. The method comprises broadcasting essential minimum system information (SI) of a cell of the wireless communication system with fixed scheduled on a downlink broadcast channel, wherein the essential minimum SI includes scheduling information for non-essential minimum SI of at least one of the cell and an auxiliary cell or a frequency location, the non-essential minimum SI is broadcasted with dynamically scheduled on a downlink shared channel, and the scheduling information includes a time and frequency resource configuration and an availability information for indicating whether the cell broadcasts the non-essential minimum SI.