Broadcast Signal Detection Using Multiplexing Factors in NTN IoT

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Solution Overview

Problem

Conventional IoT network deployment in NTN (Non-Terrestrial Networks) experiences significant interference at cell edges, leading to unreliable reception of broadcast signals due to full-frequency multiplexing designs.

Innovation Solution

A communication method and apparatus that utilize different multiplexing factors for frame numbers and resources, such as NPSS, NSSS, and NPBCH, to reduce inter-cell interference by ensuring distinct frame numbers and resource allocation based on physical cell identifiers and time/frequency domain dilution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If full-frequency multiplexing design is used in NTN IoT network deployment, then resource utilization is improved, but inter-cell interference increases and broadcast signal reception becomes unreliable

Engineering Contradiction:

Improveresource utilizationVSAvoidbroadcast signal reception reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent segments the frequency resources by introducing different multiplexing factors for different cell groups. Cells are divided into groups that use different multiplexing factors (e.g., first multiplexing factor for first group, second multiplexing factor for second group), which segments the previously unified frequency resource space into distinct regions. This segmentation reduces inter-cell interference while maintaining resource utilization within each segment.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by allowing different regions (cell groups) to have different multiplexing factor configurations. Each cell group can be locally optimized with appropriate multiplexing factors based on interference conditions, rather than applying a uniform configuration globally. This enables reliable broadcast signal reception in specific local regions while maintaining overall network resource efficiency.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If conventional IoT deployment modes are used in NTN, then deployment flexibility is improved, but cell edge interference increases

Engineering Contradiction:

Improvedeployment flexibilityVSAvoidcell edge interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces dynamic resource allocation by allowing the network to flexibly configure different multiplexing factors for different cell groups based on deployment scenarios and interference conditions. This dynamic configuration enables the system to adapt to various deployment modes while actively managing cell edge interference through appropriate multiplexing factor selection, rather than using static conventional deployment approaches.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12471067B2Method and apparatus for detecting a signal based on a multiplexing factor

Publication Date: 2025.11.11 HUAWEI TECH CO LTD

AI summary

Embodiments of this application provide a communication method and apparatus. In the method, a terminal device receives a first signal, and detects F frames of the first signal to obtain a first resource. F may be a multiplexing factor, such as a frequency/polarization multiplexing factor. The terminal device performs detection based on a frame number of the first resource to obtain a second resource. The first resource and the second resource may be a same resource.