UE Simulated DRX Inactivity During PDCCH Skipping

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Solution Overview

Problem

There is a need for further improvements in 5G NR technology to reduce power consumption in user equipment (UE) by optimizing monitoring activities.

Innovation Solution

The UE is configured to receive a message indicating a PDCCH skipping duration and determine whether to enter a simulated discontinuous reception (DRX) inactive state based on predefined conditions, thereby reducing unnecessary monitoring and conserving power.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the UE continuously monitors the PDCCH to ensure reliable communication, then the communication reliability is improved, but the power consumption increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic PDCCH monitoring during DRX active periods rather than continuous monitoring. The UE monitors PDCCH only during configured monitoring occasions and transitions to inactive state during skipping durations, achieving periodic action that reduces power consumption while maintaining communication reliability through structured monitoring cycles

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent extracts the PDCCH monitoring function from continuous operation and separates it into distinct active monitoring periods and inactive skipping periods. By taking out the monitoring activity from continuous execution and implementing it only when necessary (during active DRX periods), the system reduces power consumption while maintaining reliability during critical communication windows

Inventive Principle:

Principle #2Taking out (Extraction)

2Use of energy by moving object

If the UE enters DRX inactive state to reduce power consumption, then the power consumption is reduced, but the response time to network commands increases

Engineering Contradiction:

Improvepower consumptionVSAvoidresponse time

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The network node performs preliminary action by configuring and signaling the PDCCH skipping duration in advance before the UE actually needs to enter inactive state. This advance notification allows the UE to prepare for power saving mode without unexpected delays, reducing the effective response time penalty while still achieving power consumption reduction

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback mechanisms where the network node monitors UE status and adjusts DRX parameters dynamically. When the UE needs to respond to network commands, the network can detect this through feedback signals and adjust the skipping duration or reactivation timing, ensuring minimal impact on response time while maintaining power saving benefits

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250310891A1Method and user equipment for reducing power consumption

Publication Date: 2025.10.02 MEDIATEK INC

AI summary

A method for reducing power consumption, for a user equipment (UE) of a wireless communication network includes receiving a message indicating a commencement of a physical downlink control channel (PDCCH) skipping duration from a network node; determining whether or not to enable a simulated discontinuous reception (DRX) inactive state during the PDCCH skipping duration according to at least one predefined condition; and entering the simulated DRX inactive state when the at least one predefined condition is met.