Wake-Up Receiver Timing for Low-Power Signal Monitoring

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Solution Overview

Problem

Existing mobile communication systems face challenges in optimizing power saving for terminal devices, particularly in scenarios where terminal devices have high power consumption due to frequent wake-up signals and monitoring, such as in LTE and NR systems, despite advancements like DRX, power saving signals, and PEI.

Innovation Solution

Implementing a method for transmitting and receiving wake-up signals using a low power wake-up receiver (LP-WUR) and a low power wake-up signal (LP-WUS) to determine optimal transmission and monitoring occasions, reducing unnecessary wake-up signal transmissions and monitoring, and utilizing time domain patterns for precise control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If wake-up signals are transmitted frequently to ensure terminal devices can be woken up in time, then the responsiveness of the system is improved, but the power consumption of terminal devices increases due to frequent monitoring

Engineering Contradiction:

ImproveresponsivenessVSAvoidpower consumption

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic wake-up signal transmission at predetermined intervals instead of continuous transmission. The network device transmits wake-up signals only at specific time points, and terminal devices monitor only at these predetermined intervals, converting continuous operation into periodic action to reduce overall power consumption while maintaining system responsiveness.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent establishes predetermined time intervals for wake-up signal transmission and monitoring before actual communication needs arise. By pre-configuring when wake-up signals will be sent and when terminal devices should monitor, the system avoids unnecessary transmissions and monitoring activities, reducing power consumption while ensuring timely response when needed.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If wake-up signals are transmitted continuously to ensure no message is missed, then the reliability of communication is improved, but the power consumption and network overhead increase

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent uses periodic wake-up signal transmission at predetermined intervals to maintain communication reliability without continuous operation. Terminal devices monitor wake-up signals only at these predetermined time points, ensuring they can detect important communications while consuming significantly less power compared to continuous monitoring.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent implements partial monitoring where terminal devices monitor wake-up signals only at predetermined intervals rather than continuously. This partial action is sufficient to maintain communication reliability for most scenarios while dramatically reducing power consumption by avoiding excessive monitoring activities.

Inventive Principle:

Principle #16Partial or excessive action

3Speed

If terminal devices monitor wake-up signals continuously, then the responsiveness to incoming messages is improved, but the battery life decreases

Engineering Contradiction:

Improvemessage detection speedVSAvoidbattery life

Core Design Contradiction:

SpeedVSDuration of action of moving object

Solution Approach 1:

The patent implements periodic monitoring where terminal devices check for wake-up signals only at predetermined intervals rather than continuously. This approach maintains the ability to detect incoming messages within acceptable time frames while significantly extending battery life by keeping the receiver dormant between monitoring intervals.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent pre-configures predetermined time intervals for wake-up signal monitoring, allowing terminal devices to enter low-power states between these intervals. By establishing monitoring schedules in advance, the system ensures timely message detection while maximizing battery life through reduced receiver activity.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP4712582A1Wake-up signal receiving and transmitting methods and apparatuses, devices, and storage medium

Publication Date: 2026.03.18 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

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AI summary

Wake-up signal receiving and transmitting methods and apparatuses, devices, and a storage medium, relating to the technical field of mobile communication. The receiving method is executed by a terminal device, and comprises: in a first time interval, receiving a first signal by means of a first receiver of the terminal device, the first signal being used for waking up a second receiver of the terminal device. The transmitting method is executed by a network device, and comprises: in a first time interval, sending a first signal to a terminal device. Determining a transmission occasion and a monitoring occasion of the first signal by means of the first time interval greatly reduces the frequency of invalid transmission of wake up signals by the network device and the frequency of invalid monitoring of wake up signals by the terminal device, and enables the network device and the terminal device to determine whether to transmit and monitor a wake up signal, thereby achieving overall power saving optimization.