Downlink DRX Configuration for Power Saving and Low Latency

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Solution Overview

Problem

The increasing demand for high data throughput and diverse communication services in wireless networks has led to challenges in energy efficiency, particularly in base stations and user equipment, necessitating improved methods for discontinuous reception (DRX) configurations to reduce power consumption.

Innovation Solution

The implementation of UE-specific and cell-specific DRX configurations, along with dynamic indication of offset values and ON/OFF durations, to optimize energy saving in base stations and user equipment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If discontinuous reception (DRX) configurations are implemented to reduce power consumption, then energy efficiency is improved, but communication service responsiveness may deteriorate

Engineering Contradiction:

Improvepower consumptionVSAvoidcommunication service responsiveness

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent divides DRX configuration into two separate configurations: cell-specific DRX configuration and UE-specific DRX configuration. This segmentation allows independent optimization of each configuration's parameters, enabling the system to reduce power consumption while maintaining communication responsiveness by appropriately configuring each DRX type based on specific service requirements

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces dynamic indication of offset values relative to DRX cycle starting points and dynamic ON/OFF duration configurations. These dynamic adjustments allow the system to adapt DRX parameters in real-time based on traffic conditions and service requirements, ensuring that power savings do not compromise communication responsiveness when needed

Inventive Principle:

Principle #15Dynamics

2Use of energy by stationary object

If DRX cycle parameters are extended to save energy, then power consumption is reduced, but latency increases

Engineering Contradiction:

Improvebase station power consumptionVSAvoidcommunication latency

Core Design Contradiction:

Use of energy by stationary objectVSLoss of time

Solution Approach 1:

The patent applies different DRX configuration parameters to different UEs and different cells based on their specific requirements. By configuring offset values and ON/OFF durations locally for each UE-specific and cell-specific DRX configuration, the system can extend DRX cycles for power-saving scenarios while maintaining shorter effective latencies for time-sensitive communications through localized parameter adjustments

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent dynamically changes DRX parameters including offset values relative to DRX cycle starting points and ON/OFF durations. These parameter changes enable the system to adjust the balance between power consumption and latency dynamically, extending cycles when power saving is prioritized and reducing effective latency when communication responsiveness is critical

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20260040395A1Method, user equipment, processing device, storage medium, and computer program for receiving downlink channel, and method and base station for transmitting downlink channel

Publication Date: 2026.02.05 LG ELECTRONICS INC

AI summary

A user equipment (UE) may comprise: receiving a UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration; performing first predetermined operations during a first active time according to the cell-specific DRX configuration; and performing second predetermined operations during a time other than the first active time according to the cell-specific DRX configuration.