PDCCH Wake-Up Signaling for Lower DRX Terminal Power

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The high power consumption of terminals due to continuous monitoring of physical downlink control channels (PDCCH) in discontinuous reception (DRX) cycles is a challenge in communication technology.

Innovation Solution

Implementing a pre-indication signal to indicate whether to monitor or not to monitor PDCCH, allowing terminals to adjust their power consumption by performing monitoring behaviors on specific resources based on the signal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the terminal monitors PDCCH continuously in DRX cycles, then the reliability of receiving control information is improved, but the power consumption increases

Engineering Contradiction:

Improvereliability of receiving control informationVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent introduces a wake-up signal transmitted before the PDCCH monitoring period. The terminal first decodes this preliminary wake-up signal to determine whether full PDCCH monitoring is necessary, thereby performing a preliminary action that prevents unnecessary power consumption while ensuring reliable reception when needed

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent segments the PDCCH monitoring process into two parts: a wake-up signal phase (where the terminal checks indication information) and a full monitoring phase (where the terminal monitors PDCCH only if needed). This segmentation allows the terminal to avoid continuous monitoring and reduces power consumption while maintaining reliability

Inventive Principle:

Principle #1Segmentation

2Speed

If the terminal continuously monitors PDCCH, then the responsiveness to downlink control information is improved, but the power consumption increases

Engineering Contradiction:

Improveresponsiveness to downlink control informationVSAvoidpower consumption

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The wake-up signal serves as a preliminary action that informs the terminal whether full monitoring is required. This preliminary notification mechanism maintains responsiveness by ensuring the terminal is ready to monitor immediately when needed, while avoiding unnecessary monitoring and power consumption

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The wake-up signal acts as an intermediary between the network and terminal, carrying indication information that mediates between the terminal's power-saving needs and the network's control information delivery requirements. This intermediary mechanism maintains responsiveness without requiring continuous monitoring

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12593347B2Method for transmitting indication signal, terminal and network device

Publication Date: 2026.03.31 VIVO MOBILE COMM CO LTD

AI summary

A method for transmitting an indication signal, a terminal and a network device are provided. The method includes: receiving a pre-indication signal, where the pre-indication signal is configured to indicate to monitor a physical downlink control channel (PDCCH) or not to monitor the PDCCH; and performing a monitoring behavior on a first resource corresponding to the pre-indication signal according to the pre-indication signal.