Sidelink Data Transmission Aligned With Receiver DRX Cycles

Solution Overview

Problem

In sidelink communication, transmitting data to a receiving terminal in a sleeping state can cause data loss due to the receiving terminal's discontinuous reception (DRX) configuration, leading to inefficiencies and power consumption issues.

Innovation Solution

The transmitting terminal determines sidelink resources based on the receiving terminal's DRX information to avoid transmitting data during its sleeping state, using methods such as unicast, multicast, or broadcast messages to convey DRX information and select appropriate resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If data transmission is performed without considering DRX information, then transmission simplicity is maintained, but data loss occurs when the receiving terminal is in sleeping state

Engineering Contradiction:

Improvedata transmission reliabilityVSAvoidtransmission process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The transmitting terminal acquires the DRX information of the receiving terminal before performing data transmission, and determines the sidelink resources based on this DRX information in advance, ensuring data is transmitted only during the receiving terminal's active periods to prevent data loss

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The receiving terminal feeds back its DRX information to the transmitting terminal, enabling the transmitter to adjust its transmission timing according to the receiver's sleep-wake cycles, creating a closed-loop system that prevents data loss during sleeping periods

Inventive Principle:

Principle #23Feedback

2Reliability

If continuous reception mode is used, then data reception reliability is improved, but power consumption increases

Engineering Contradiction:

Improvedata reception reliabilityVSAvoidterminal power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The receiving terminal adopts discontinuous reception (DRX) mode, periodically switching between sleeping and active states, thereby reducing power consumption while maintaining the ability to receive data during scheduled active periods

Inventive Principle:

Principle #19Periodic action

3Productivity

If data transmission occurs during receiving terminal's sleeping state, then transmission resource utilization is simplified, but data loss and retransmission occur

Engineering Contradiction:

Improvetransmission efficiencyVSAvoiddata loss

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The transmitting terminal acquires the DRX information of the receiving terminal before performing data transmission, and determines the sidelink resources based on this DRX information in advance, ensuring data is transmitted only during the receiving terminal's active periods to prevent data loss

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The receiving terminal feeds back its DRX information to the transmitting terminal, enabling the transmitter to adjust its transmission timing according to the receiver's sleep-wake cycles, creating a closed-loop system that prevents data loss during sleeping periods

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12414194B2Direct link data transmission method and apparatus, and storage medium

Publication Date: 2025.09.09 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A sidelink data transmission method is performed by a first terminal and includes: receiving, from a second terminal, discontinuous reception (DRX) information of the second terminal; determining sidelink resources based on the DRX information; and transmitting sidelink data to the second terminal based on the sidelink resources.