Low-Power Wake-Up Signal Power Configuration for Coverage Extension

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Solution Overview

Problem

The low-power wake-up signal (LP WUS) receiver in wireless communication systems has lower reception sensitivity than the main receiver, leading to a smaller coverage area and the need for improved coverage enhancement.

Innovation Solution

Transmission of power configuration information for the low-power wake-up signal, including power offset relative to synchronization signals, and repeated transmissions in the time domain, along with frequency-domain positioning, to enhance signal strength and coverage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If a separate low-power wake-up signal receiver is used, then power consumption is reduced, but reception sensitivity deteriorates

Engineering Contradiction:

Improvepower consumptionVSAvoidreception sensitivity

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

A separate low-power wake-up signal receiver is introduced as an intermediary component between the main receiver and the wake-up signal. This dedicated receiver has lower power consumption characteristics while being specifically optimized for wake-up signal detection, thus resolving the contradiction between power consumption and reception sensitivity by having a specialized component rather than relying on the main receiver for both functions

Inventive Principle:

Principle #24Intermediary (Mediator)

2Use of energy by moving object

If a separate low-power wake-up signal receiver is used, then power consumption is reduced, but coverage area decreases

Engineering Contradiction:

Improvepower consumptionVSAvoidcoverage area

Core Design Contradiction:

Use of energy by moving objectVSArea of stationary object

Solution Approach 1:

The system employs periodic wake-up signal transmissions with configurable repetition counts and time offsets. By repeating the wake-up signal multiple times at defined intervals, the effective coverage area is extended while the receiver remains in low-power state between receptions, thus resolving the contradiction between reduced power consumption and decreased coverage area through time-domain repetition strategies

Inventive Principle:

Principle #19Periodic action

3Use of energy by moving object

If the main transceiver is kept in sleep state, then power consumption is reduced, but wake-up capability is lost

Engineering Contradiction:

Improvepower consumptionVSAvoidwake-up capability

Core Design Contradiction:

Use of energy by moving objectVSEase of operation

Solution Approach 1:

The receiver functionality is segmented into two distinct components: a main transceiver for high-performance data communication and a separate low-power wake-up signal receiver for wake-up detection. This segmentation allows the main transceiver to remain in sleep state for power savings while the dedicated wake-up receiver maintains wake-up capability independently, thus resolving the contradiction between power consumption and wake-up capability through functional separation

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250212126A1Method and device for transmitting power information of low-power wake-up signal, and readable storage medium

Publication Date: 2025.06.26 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A method for transmitting power information of a low-power wake-up signal is performed by a user device. The method includes: receiving power configuration information from a first network device, wherein the power configuration information is configured to indicate power information for a low-power wake-up signal, the low-power wake-up signal being received by a set receiver of the user device.