Idle Mode DRX Deactivation for Low-Latency UE Power Saving

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Solution Overview

Problem

Existing DRX mechanisms consume excessive power in user equipment due to continuous monitoring of the physical downlink control channel, which is inefficient for low latency services.

Innovation Solution

Dynamically deactivate idle mode DRX on user equipment with low latency requirements by remotely updating the DRX activation bit and FGI bits using a secure lightweight machine-to-machine framework, allowing devices to operate in a power-saving mode without manual configuration changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If DRX is enabled to save battery life, then power consumption is reduced, but latency increases due to discontinuous monitoring of PDCCH

Engineering Contradiction:

Improvepower consumptionVSAvoidlatency

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The patent applies dynamics by making the DRX configuration changeable and adaptable. The network can dynamically switch between DRX active and inactive states based on service requirements, allowing the system to transition from static power-saving mode to dynamic service-aware mode, resolving the contradiction between power saving and latency for different service types

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of DRX activation status from fixed to variable. By introducing an activation indicator that can be set to different values (active/inactive) based on service requirements, the system adjusts the DRX parameter to match different latency requirements, enabling low latency for critical services while maintaining power saving for general services

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If manual configuration changes are required for DRX deactivation, then device complexity increases, but adaptability to low latency services decreases

Engineering Contradiction:

Improveadaptability to low latency servicesVSAvoidconfiguration complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements self-service by enabling the network to automatically manage DRX configuration without user intervention. The network node can unilaterally send activation deactivation indicators to the UE based on service detection, making the system autonomous and eliminating the need for manual configuration changes while maintaining high adaptability

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent uses feedback mechanisms where the network monitors service requirements and sends corresponding DRX activation deactivation indicators to the UE. This closed-loop feedback system allows the network to adapt DRX settings in real-time based on actual service needs, enhancing adaptability without requiring complex manual reconfiguration

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12495361B2Modifying idle mode drx on wireless devices

Publication Date: 2025.12.09 AT&T INTELLECTUAL PROPERTY I L P

AI summary

Systems and methods may provide for deactivating the Idle mode discontinuous reception (iDRX) for services that require latency that is less than the conventional paging channel values.