Per-BWP DRX Wake-Up Trigger Switching for UE Power Savings

Solution Overview

Problem

Existing wireless communication systems face limitations in system performance due to restrictions on simultaneous configuration of DCI format 2_6 and LP-WUS for DRX active time triggers, which can be more or less suitable depending on deployment scenarios, network conditions, or UE capabilities, leading to suboptimal power consumption and system knowledge.

Innovation Solution

Configuring different downlink bandwidth parts (BWPs) of a serving cell with either DCI format 2_6 or LP-WUS as DRX active time triggers, allowing dynamic switching based on current deployment scenarios, network conditions, or UE capabilities, enabling flexible power management and system knowledge adaptation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If DCI format 2_6 is configured for DRX active time trigger, then system knowledge is improved, but power consumption increases

Engineering Contradiction:

Improvesystem knowledgeVSAvoidpower consumption

Core Design Contradiction:

Loss of informationVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic switching between DCI format 2_6 and LP-WUS for DRX active time triggers based on BWP activation status. When a first BWP is active, the UE monitors for DCI format 2_6 to trigger DRX active time; when a second BWP is active, the UE monitors for LP-WUS. This dynamic adaptation allows the system to optimize between gaining system knowledge (DCI format 2_6) and saving power (LP-WUS) depending on current network conditions and UE capabilities.

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If LP-WUS is configured for DRX active time trigger, then power savings are improved, but system knowledge is reduced

Engineering Contradiction:

Improvepower savingsVSAvoidsystem knowledge

Core Design Contradiction:

Use of energy by moving objectVSLoss of information

Solution Approach 1:

The patent implements dynamic switching between DCI format 2_6 and LP-WUS for DRX active time triggers based on BWP activation status. When a first BWP is active, the UE monitors for DCI format 2_6 to trigger DRX active time; when a second BWP is active, the UE monitors for LP-WUS. This dynamic adaptation allows the system to optimize between gaining system knowledge (DCI format 2_6) and saving power (LP-WUS) depending on current network conditions and UE capabilities.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If multiple BWPs are configured with different DRX triggers, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improvedeployment flexibilityVSAvoidconfiguration complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the DRX trigger configuration by downlink BWP, allowing different trigger mechanisms (DCI format 2_6 or LP-WUS) to be associated with different BWPs. The network configures multiple BWPs with distinct DRX active time trigger settings, and the UE determines which trigger to monitor based on which BWP is currently active. This segmentation enables deployment flexibility while managing complexity through clear association rules.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by allowing different DRX trigger characteristics to be assigned to different BWPs based on local requirements. Each BWP can be independently configured with either DCI format 2_6 or LP-WUS as its DRX active time trigger, enabling optimization for specific deployment scenarios, network conditions, or UE capabilities on a per-BWP basis rather than applying a uniform configuration system-wide.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20260032586A1Configuration of a discontinuous reception active time trigger on a per downlink bandwidth part basis

Publication Date: 2026.01.29 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communication are described. Various aspects relate generally to configurations of discontinuous reception (DRX) active time triggers on a per downlink bandwidth part (BWP) basis. Some aspects more specifically relate to a user equipment (UE) monitoring for downlink control information (DCI) format 2_6 or a low-power wake-up signal (LP-WUS) to trigger a DRX active time based on which downlink BWP is an active downlink BWP. For example, the UE may receive information pertaining to a set of downlink BWPs of a serving cell and the information may indicate a DRX active time trigger for each downlink BWP of the set of downlink BWPs. The UE may accordingly monitor for a specific type of DRX active time trigger based on the information and based on which of the set of downlink BWPs is the active downlink BWP.