Wake-Up Signal Multiplexing for Wider LP-WUS Coverage

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Solution Overview

Problem

The limited coverage range and transmission performance of low power wake up signals (LP-WUS) in low power wake up receivers (LP-WUR) due to their simple implementation, low device complexity, and low power working mode, which affects the efficiency of waking up main receivers in terminal devices.

Innovation Solution

A wireless communication method involving the transmission of a first target signal comprising K first signals to wake up a main receiver in a terminal device, utilizing time-division and frequency-division multiplexing, and potentially including a synchronization signal, to enhance coverage and performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If simple coding and modulating modes are adopted for LP-WUS, then device complexity is reduced, but coverage range and transmission performance deteriorate

Engineering Contradiction:

Improvedevice complexityVSAvoidcoverage range

Core Design Contradiction:

Device complexityVSLength of stationary object

Solution Approach 1:

The patent divides the wake-up signal into multiple components (first wake-up signal and second wake-up signal) with different coding and modulating modes. The first wake-up signal uses simple modes for low complexity, while the second wake-up signal uses more complex modes for extended coverage, allowing each segment to serve its specific function optimally.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the coding and modulating parameters based on the signal type and transmission requirements. Different wake-up signals use different parameter sets, allowing the system to optimize between complexity and coverage by selecting appropriate parameters for each signal component.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If simple coding and modulating modes are adopted for LP-WUS, then device complexity is reduced, but transmission performance deteriorates

Engineering Contradiction:

Improvedevice complexityVSAvoidtransmission performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The wake-up signal is segmented into multiple components with different reliability characteristics. The first wake-up signal provides basic wake-up function with low complexity, while the second wake-up signal enhances transmission performance and reliability for distant or interference-prone scenarios.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different coding and modulating parameters are applied to different wake-up signals based on their functional requirements. This allows the system to maintain low complexity for basic operations while achieving high transmission performance when needed through parameter selection.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250351087A1Wireless communication methods, network devices and terminal devices

Publication Date: 2025.11.13 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

A method for wireless communication, which includes: transmitting, by a network device, a first target signal, where the first target signal includes K first signals, and the first signals are used for waking up a main receiver of a terminal device, or the first target signal is used for waking up the main receiver of the terminal device, K being a positive integer.