Sidelink DRX Configuration for Energy-Efficient UE Reception

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing DRX mechanisms are not applicable to device-to-device (D2D), vehicle-to-vehicle (V2V), and vehicle-to-everything (V2X) communication systems, leading to excessive energy consumption due to continuous listening states without adequate dormancy, which is not addressed in sidelink (SL) transmission technologies.

Innovation Solution

A method for configuring discontinuous reception (DRX) parameters in user equipment (UE) by determining a recommended DRX configuration based on implementation, geographic location, or network specifications to limit the selection range, ensuring sufficient dormancy periods and reducing energy consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If continuous listening is implemented in SL transmission, then communication reliability is improved, but energy consumption increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements discontinuous reception (DRX) in sidelink transmission by periodically switching between active listening states and dormant states. The receiving UE follows a configured DRX cycle where it actively monitors for data during active periods and enters low-power dormant periods, thereby reducing energy consumption while maintaining communication reliability through periodic availability.

Inventive Principle:

Principle #19Periodic action

2Use of energy by moving object

If DRX mechanism is applied to SL transmission, then energy consumption is reduced, but communication responsiveness may deteriorate

Engineering Contradiction:

Improveenergy consumptionVSAvoidcommunication responsiveness

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The patent employs dynamic DRX configuration where the network can adjust DRX parameters (cycle length, active period duration) based on communication conditions. This allows the system to adapt between more aggressive power-saving modes and more responsive modes depending on traffic patterns and service requirements, balancing energy consumption with communication responsiveness.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements feedback mechanisms where the receiving UE reports its DRX status and communication conditions to the transmitting UE and network. This enables dynamic adjustment of DRX parameters to optimize both power saving and responsiveness, with the feedback loop ensuring that responsiveness requirements are met while maintaining energy efficiency.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12490255B2Sidelink parameter configuration method and user equipment

Publication Date: 2025.12.02 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Disclosed are sidelink (SL) parameter configuration method and user equipment (UE). The method comprises: determining a recommended discontinuous reception (DRX) configuration of the first UE, the recommended DRX configuration depending on implementation of the first UE; sending the recommended DRX configurations to a second UE; receiving a configuration response from the second UE; determining a first DRX configuration of the first UE according to the configuration response; and discontinuously receiving, according to the first DRX configuration, data sent by the second UE.