Broadcast Channel Configuration Using Explicit Implicit Signaling

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Solution Overview

Problem

The New Radio (NR) system lacks a concrete method for configuring and transmitting broadcast channels, particularly in supporting various numerologies required for 'IMT for 2020 and beyond' standards, including high frequency bands and low latency, which poses challenges in synchronization signal configuration and frame timing information indication.

Innovation Solution

A method and apparatus for explicitly indicating part of the frame information through a broadcast channel while implicitly indicating the remaining part, utilizing a combination of explicit and implicit signaling schemes for System Frame Number (SFN) information and employing multi-beam transmission to enhance signal coverage in high frequency bands.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If explicit signaling is used for all frame information, then information completeness is improved, but signaling overhead increases

Engineering Contradiction:
Improveframe information completenessVSAvoidsignaling overhead
Core Design Contradiction:
Loss of informationVSQuantity of substance

Solution Approach 1:

The frame information is segmented into two parts: explicitly signaled information (SFN and timing information) and implicitly determined information (remaining frame structure parameters). This segmentation allows critical information to be explicitly transmitted while reducing overall signaling overhead by leaving other information to be derived implicitly from the transmitted portions.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent uses timing information as an intermediary that links the explicitly signaled SFN with the implicitly determined frame structure. The timing information serves as a mediator that allows the receiving end to reconstruct complete frame information without requiring all parameters to be explicitly signaled, thus reducing overhead while maintaining information completeness.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Area of stationary object

If multi-beam transmission is used, then signal coverage is improved, but system complexity increases

Engineering Contradiction:
Improvesignal coverage areaVSAvoidtransmission system complexity
Core Design Contradiction:
Area of stationary objectVSDevice complexity

Solution Approach 1:

The patent employs periodic beam sweeping where multiple beams are transmitted in a periodic sequence to cover different spatial directions. This periodic action allows the system to achieve comprehensive coverage by systematically cycling through different beam directions, making the complex multi-beam process manageable through regular patterns rather than requiring simultaneous complex coordination of all beams.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The system uses dynamic beam selection and switching based on channel conditions and user equipment locations. Rather than maintaining all beams continuously active, the system dynamically activates and switches between beams as needed, adapting to changing conditions. This dynamic approach reduces the effective complexity by not requiring all beams to be managed simultaneously while still providing comprehensive coverage when needed.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP3580977B1Method and apparatus for broadcast channel configuration and broadcast channel transmission and reception for communication system
Publication Date: 2022.12.14 INNOVATIVE TECH LAB CO LTD
  • EP3580977B1 patent drawingFigure 1
  • EP3580977B1 patent drawingFigure 2(a)~2(b)
  • EP3580977B1 patent drawingFigure 3

AI summary

A method, apparatus, and system for generating and transmitting a physical broadcast channel (PBCH) are provided. A base station may perform a first scrambling process on PBCHs in a time period before a channel coding, and perform a second scrambling process after the channel coding. PHCH payloads and PBCH DMRS may provide information bits to be used in the scrambling processes.