DRX Alignment Signaling for Wireless Power Optimization

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Solution Overview

Problem

Current wireless communication systems face challenges in optimizing discontinuous reception (DRX) configurations for sidelink and Uu interfaces, leading to inefficiencies in power management and communication alignment between user equipment (UE) and base stations.

Innovation Solution

The proposed solution involves an apparatus and method for wireless communications that allow a base station to receive DRX assistance information from a UE, configure appropriate DRX configurations for both sidelink and Uu interfaces, and transmit these configurations to the UE, ensuring alignment and optimizing power usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If separate DRX configurations are used for sidelink and Uu interfaces, then interface-specific power management is optimized, but misalignment between configurations causes inefficiencies

Engineering Contradiction:

Improvepower consumptionVSAvoidDRX alignment

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The base station receives DRX assistance information from the UE, which includes feedback about the UE's current DRX configuration and power consumption patterns. This feedback enables the base station to adjust both sidelink and Uu DRX configurations to ensure alignment while optimizing power management.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system dynamically adjusts DRX configurations for both sidelink and Uu interfaces based on real-time conditions. The base station can independently modify DRX parameters for each interface while maintaining coordination, allowing the system to adapt to changing power and alignment requirements.

Inventive Principle:

Principle #15Dynamics

2Productivity

If DRX configurations are aligned between Uu and sidelink interfaces, then communication efficiency is improved, but configuration complexity increases

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidconfiguration complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The DRX configuration process is segmented into distinct components: base station configuration of sidelink DRX, UE application of configurations, and base station reception of assistance information. This segmentation allows each component to be optimized independently while maintaining overall alignment.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The base station acts as an intermediary that coordinates between the UE's sidelink DRX needs and Uu interface requirements. By receiving assistance information and processing it to generate aligned configurations, the base station simplifies the overall configuration complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Use of energy by moving object

If base station configures both SL DRX and Uu DRX based on UE assistance information, then power management is optimized, but signaling overhead increases

Engineering Contradiction:

Improvepower managementVSAvoidsignaling overhead

Core Design Contradiction:

Use of energy by moving objectVSLoss of information

Solution Approach 1:

The DRX assistance information structure is designed to serve multiple purposes: it provides the base station with power consumption data, current configuration status, and alignment requirements all in one signaling message. This multi-functional approach reduces overall signaling overhead.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system efficiently manages DRX parameters by allowing the base station to modify configuration values based on the assistance information received. By changing parameters dynamically rather than exchanging complete configuration sets, the system reduces signaling overhead while maintaining optimal power management.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12295063B2Signaling of joint alignment of UU DRX and SL DRX

Publication Date: 2025.05.06 QUALCOMM INC

AI summary

Aspects present herein relate to methods and devices for wireless communication including an apparatus, e.g., a UE and/or a base station. More specifically, aspects described are directed to enhancements to bi-directional alignment of discontinuous reception (DRX). In some examples, an apparatus may receive, from a first user equipment (UE), an indication of discontinuous reception (DRX) assistance information. The apparatus may further configure a first sidelink (SL) DRX configuration for the first UE, a second SL DRX configuration for a second UE, and a first UE-universal mobile telecommunications system terrestrial radio access (UTRA) interface (Uu) DRX configuration for the first UE, wherein at least one of the first SL DRX configuration, the second SL DRX configuration, and the first Uu DRX configuration are configured based on the DRX assistance information.