Sidelink DRX Identifier Scheduling for Terminal Power Saving

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Solution Overview

Problem

Existing communication systems face challenges in achieving power saving in sidelink communications, particularly for terminal devices.

Innovation Solution

Implementing Discontinuous Reception (DRX) operations based on physical and MAC layer identifiers in sidelink communications to manage terminal device power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If continuous reception is used in sidelink communications, then communication reliability is improved, but terminal device power consumption increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidterminal device power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements Discontinuous Reception (DRX) operations where the terminal device periodically wakes up to monitor physical layer identifiers and MAC layer identifiers at specific time intervals, then returns to sleep mode. This periodic monitoring pattern allows the device to maintain communication reliability by detecting relevant messages while significantly reducing power consumption compared to continuous reception.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent introduces physical layer identifiers and MAC layer identifiers as intermediary elements that enable the terminal device to indirectly detect the presence of relevant communication messages. Instead of continuously monitoring all communications, the device only needs to check for these specific identifiers during DRX wake periods, resolving the contradiction between reliability and power consumption.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Use of energy by moving object

If DRX operations are implemented in sidelink communications, then terminal device power saving is improved, but communication responsiveness may deteriorate

Engineering Contradiction:

Improveterminal device power consumptionVSAvoidcommunication responsiveness

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The patent configures DRX parameters in advance, including wake-up time intervals and monitoring durations for physical layer identifiers and MAC layer identifiers. By pre-planning the reception schedule, the terminal device knows exactly when to wake up and monitor, ensuring that important messages are not missed while maximizing sleep time for power saving.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent allows dynamic adjustment of DRX parameters based on communication conditions. The terminal device can adaptively modify wake-up intervals and monitoring durations according to traffic patterns and communication requirements, optimizing the balance between power saving and responsiveness for different scenarios.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP4271055B1Wireless communication method and terminal device

Publication Date: 2025.11.19 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

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AI summary

A wireless communication method and a terminal device. The method comprises: a first terminal receives a first message sent by a second terminal; acquires a target physical layer identifier and/or a target medium access control (MAC) layer identifier in the first message; and executes a discontinuous reception (DRX) operation according to the target physical layer identifier and/or the target MAC layer identifier.