UE DTX/DRX Message Detection With Fallback Coordination

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Solution Overview

Problem

UEs may miss or fail to detect activation/deactivation messages for cell discontinuous operations such as DTX or DRX, leading to increased power consumption, latency, and decreased efficiency in wireless communication.

Innovation Solution

The UE reports failed detection of activation/deactivation messages to higher layers, allowing for corrective actions to align with the network entity's DTX/DRX configuration, including autonomous switching to a fallback configuration or transmitting a failure indication to the network.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the UE operates in cell discontinuous operation mode to save energy, then power consumption is reduced, but the risk of missing activation/deactivation messages increases

Engineering Contradiction:

Improvepower consumptionVSAvoidmessage detection reliability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The UE performs preliminary actions by monitoring for a predetermined number of activation messages before fully activating the cell discontinuous operation. This gradual activation approach ensures that the UE is properly synchronized and ready to receive commands, reducing the risk of missing critical deactivation messages while still achieving energy savings.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The UE implements feedback mechanisms by reporting to the network entity when it has successfully monitored the required number of activation messages. This feedback loop allows the network to verify UE readiness and coordinate activation/deactivation timing, ensuring reliable message delivery while maintaining energy efficiency.

Inventive Principle:

Principle #23Feedback

2Reliability

If the UE monitors for activation messages continuously to ensure reliable detection, then message detection reliability improves, but power consumption increases

Engineering Contradiction:

Improvemessage detection reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The UE performs preliminary monitoring of activation messages for a predetermined number of times before entering full cell discontinuous operation. This preliminary phase ensures the UE is synchronized and ready, allowing it to reliably detect subsequent activation/deactivation messages while minimizing continuous monitoring and reducing power consumption.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The UE transitions from continuous monitoring to periodic monitoring by only checking for activation messages at specific intervals defined by the cell discontinuous operation cycle. This periodic approach significantly reduces power consumption while maintaining reliable detection of activation and deactivation messages during active periods.

Inventive Principle:

Principle #19Periodic action

3Loss of time

If the UE activates cell discontinuous operation immediately to reduce latency, then response time improves, but synchronization with network entity deteriorates

Engineering Contradiction:

Improveactivation latencyVSAvoidsynchronization stability

Core Design Contradiction:

Loss of timeVSStability of the object's composition

Solution Approach 1:

The UE performs preliminary monitoring of activation messages for a predetermined number of times before activating cell discontinuous operation. This preliminary phase establishes proper synchronization with the network entity's timing, ensuring that when the UE does activate discontinuous operation, it remains synchronized and can reliably detect subsequent activation/deactivation messages without excessive latency.

Inventive Principle:

Principle #10Preliminary action

4Measurement precision

If the UE requires multiple activation message confirmations before activation to ensure synchronization, then synchronization accuracy improves, but activation time increases

Engineering Contradiction:

Improvesynchronization accuracyVSAvoidactivation time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The UE performs preliminary monitoring of activation messages for a predetermined number of times before activating cell discontinuous operation. This preliminary phase ensures proper synchronization with the network entity by confirming the UE is correctly aligned with the activation message timing. The predetermined number is optimized to achieve sufficient synchronization accuracy without excessive delay, balancing synchronization precision with activation speed.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250227807A1User equipment behavior based on detection of cell discontinuous operation

Publication Date: 2025.07.10 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may report, from a first layer of the UE to a second layer of the UE, a failure to receive an activation message or a deactivation message associated with a cell discontinuous operation in accordance with information differentiating a first communication during active periods of the cell discontinuous operation from a second communication outside of the active periods. The UE may transmit, to a network entity, a message indicating the failure to receive the activation message or the deactivation message. Additionally, or alternatively, the UE may change an activation status of a cell discontinuous transmission (DTX) or discontinuous reception (DRX) configuration at the UE based on the reporting of the failure to receive the activation message or the deactivation message.