Sidelink DRX Wake-Up Scheduling for Lower Terminal Power Use

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Solution Overview

Problem

Existing communication systems face challenges in achieving power savings in sidelink communications for terminal devices.

Innovation Solution

Implementing Discontinuous Reception (DRX) operations based on target physical and MAC layer identifiers in wireless communication methods and terminal devices, including receiving and transmitting messages with timers to manage power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If terminal devices continuously monitor sidelink communications, then communication reliability is improved, but power consumption increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements Discontinuous Reception (DRX) operation where terminal devices alternately wake up to monitor sidelink communications and sleep to conserve power. The device wakes up at specific intervals to check for messages addressed to its identifiers, then returns to sleep mode, creating a periodic monitoring pattern that balances reliability and power consumption.

Inventive Principle:

Principle #19Periodic action

2Reliability

If terminal devices wake up frequently to check messages, then message reception reliability is improved, but power saving effect deteriorates

Engineering Contradiction:

Improvemessage reception reliabilityVSAvoidpower saving effect

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent extracts only the essential monitoring function from continuous operation. Instead of continuously monitoring all communications, the terminal device selectively wakes up only when there is a possibility of receiving messages addressed to its identifiers. This extraction of necessary monitoring moments from continuous operation achieves both reliable message reception and power saving.

Inventive Principle:

Principle #2Taking out (Extraction)

3Use of energy by moving object

If terminal devices use DRX operation, then power consumption is reduced, but message reception timeliness may deteriorate

Engineering Contradiction:

Improvepower consumptionVSAvoidmessage reception timeliness

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The patent configures the terminal device to wake up at predetermined intervals and check for messages before they might be transmitted. By performing preliminary checks at scheduled times, the device ensures that messages can be received timely when transmitted, while still maintaining power saving benefits from the structured DRX pattern. The wake-up schedule is designed to anticipate potential message transmission times.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12574995B2Discontinuous reception communication method and terminal device

Publication Date: 2026.03.10 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

A wireless communication method and a terminal device are provided. The method includes: receiving, by a first terminal, a first message sent by a second terminal; obtaining a target physical identifier and/or a target Media Access Control (MAC) layer identifier in the first message; and performing a Discontinuous Reception (DRX) operation according to the target physical layer identifier and/or the target MAC layer identifier.