IoT Wake-Up Signal Duration Configuration for DRX Response Delays

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Solution Overview

Problem

Existing IoT devices face increased power consumption and delayed response times due to long standby periods in Discontinuous Reception (DRX) states, affecting user experience in applications like bicycle-sharing services.

Innovation Solution

A method to configure the duration of wake-up signals (WUS) based on coverage parameters, allowing IoT devices to associate WUS durations with specific coverage ranges, thereby optimizing power consumption and response times.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the UE enters a long-term DRX state to save energy, then power consumption is reduced, but response delay to paging increases

Engineering Contradiction:

Improvepower consumptionVSAvoidresponse delay

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The patent introduces a wake-up signal (WUS) that is transmitted before the paging signal. The WUS serves as a preliminary action to wake up the UE from DRX state before the actual paging notification is delivered. This allows the UE to stay in energy-saving mode longer while still being able to respond quickly to paging when needed, as the WUS提前 notifies the UE to wake up and prepare for paging reception.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the WUS is repeated several times to cover the entire cell, then coverage is improved, but signaling overhead increases

Engineering Contradiction:

ImprovecoverageVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent applies different WUS repetition configurations based on the UE's coverage condition. Instead of uniformly repeating the WUS the same number of times for all UEs, the network device determines the appropriate repetition count based on the specific coverage requirements of each UE. This allows optimal WUS repetition for each UE's location and coverage needs, reducing unnecessary repetitions for UEs in well-covered areas while ensuring adequate coverage for UEs in challenging locations.

Inventive Principle:

Principle #3Local quality

3Use of energy by moving object

If the WUS is transmitted at few repetition times, then power consumption is reduced, but coverage is limited

Engineering Contradiction:

Improvepower consumptionVSAvoidcoverage

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent makes the WUS repetition configuration dynamic rather than fixed. The network device dynamically determines the number of WUS repetitions based on real-time or pre-configured coverage conditions of different UEs. This dynamic adjustment allows the system to optimize the balance between power consumption and coverage for each UE individually, transmitting the WUS fewer times for UEs with good coverage conditions and more times for UEs requiring extended coverage.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP3672313B1Method for configuring duration of wake-up signal, acquisition method, network device, and terminal

Publication Date: 2025.10.15 CHINA MOBILE COMM GRP CO LTD

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AI summary

The present disclosure provides a WUS duration configuration method, a WUS monitoring method, a network device and a UE. The WUS duration configuration method includes: generating configuration information including a duration of a WUS, the WUS being used to wake up an IoT UE, the duration being associated with one or more coverage parameters configured by a network device for the IoT UE; and transmitting the configuration information to the IoT UE.