Sidelink DRX Parameter Configuration for Power Saving and Low Delay

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing LTE systems do not effectively configure power-saving mechanisms for Sidelink communications between user equipment, leading to increased power consumption and potential delays due to prolonged channel monitoring.

Innovation Solution

A method and apparatus for configuring Discontinuous Reception (DRX) parameters on Sidelink interfaces, allowing user equipment to send and receive control signaling for DRX parameter configuration, including DRX cycles, timers, and priority rules to optimize power saving and data transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If user equipment continuously monitors the channel for Sidelink communications, then data transmission reliability is improved, but power consumption increases

Engineering Contradiction:

Improvedata transmission reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies periodic action by implementing DRX (Discontinuous Reception) mechanisms where user equipment periodically wakes up to monitor control channels and transmits data only during active periods. The base station configures DRX parameters including cycle length, on-duration, and inactivity timers that control when the UE transitions between sleep and active states, enabling periodic channel monitoring rather than continuous monitoring, thus reducing power consumption while maintaining transmission reliability during active periods

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent applies dynamics by making the channel monitoring behavior adaptive and configurable. The base station dynamically adjusts DRX parameters based on traffic conditions, UE capabilities, and communication requirements. The system transitions from static continuous monitoring to dynamic periodic monitoring where the monitoring interval and duration are adjusted in real-time, allowing the system to optimize between power saving and reliability based on actual network conditions

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If DRX parameters are configured to save power, then power consumption is reduced, but data transmission delay increases

Engineering Contradiction:

Improvepower consumptionVSAvoiddata transmission delay

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having the base station pre-configure DRX parameters and send configuration information to user equipment before actual data transmission begins. The base station sends configuration signaling that includes DRX cycle length, on-duration timers, and inactivity timers in advance, allowing the UE to prepare its reception schedule ahead of time. This preliminary configuration enables the UE to enter power-saving mode while ensuring that when data needs to be transmitted, the UE is already positioned to receive it efficiently, minimizing delay

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent applies feedback mechanisms where the base station monitors UE reception status and DRX parameter effectiveness, and adjusts parameters accordingly. The system uses feedback information about data transmission success, UE wake-up timing, and channel conditions to optimize DRX configuration in real-time, balancing power saving with transmission speed by learning from actual performance data

Inventive Principle:

Principle #23Feedback

3Reliability

If channel monitoring duration is prolonged to ensure data reception, then data transmission reliability is improved, but power consumption increases

Engineering Contradiction:

Improvedata reception reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies periodic action by implementing DRX mechanisms where user equipment periodically wakes up to monitor control channels and transmits data only during active periods. The base station configures DRX parameters including cycle length, on-duration, and inactivity timers that control when the UE transitions between sleep and active states, enabling periodic channel monitoring rather than continuous monitoring, thus reducing power consumption while maintaining transmission reliability during active periods

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent applies parameter changes by dynamically adjusting DRX configuration parameters such as cycle length, on-duration time, and inactivity timers based on network conditions and UE requirements. The base station can modify these parameters to optimize the balance between power saving and reception reliability, adapting the monitoring duration and frequency to actual needs rather than using fixed prolonged monitoring

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12484108B2Method for configuring DRX parameter for Sidelink, and terminal device

Publication Date: 2025.11.25 VIVO MOBILE COMM CO LTD

AI summary

A method for configuring a DRX parameter for a Sidelink, and terminal devices includes: the first user equipment can send the second user equipment a control signaling carrying configuration information, where the configuration information is used to configure a DRX parameter.