Scheduled Carrier Activation Time Determination in Cross-Carrier Scheduling

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Solution Overview

Problem

In wireless communication systems, determining the active time of a scheduled carrier in a cross-carrier scheduling scenario is challenging, leading to inefficient power management and increased power consumption in communication devices.

Innovation Solution

A method and apparatus for determining the active time of a scheduled carrier by using the DRX configuration of the scheduling carrier, allowing the communication device to accurately identify when the scheduled carrier is active, thereby optimizing power usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the scheduled carrier is activated independently in cross-carrier scheduling, then data transmission reliability is improved, but power consumption increases

Engineering Contradiction:

Improvedata transmission reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent merges the activation control of the scheduled carrier with the scheduling carrier's active time. The scheduled carrier is activated only when the scheduling carrier is active and has scheduling information for the scheduled carrier, combining both carriers' control into a unified mechanism that reduces unnecessary activation and power consumption while maintaining transmission reliability.

Inventive Principle:

Principle #5Merging (Combining)

2Speed

If the scheduled carrier monitors PDCCH continuously, then scheduling responsiveness is improved, but power consumption increases

Engineering Contradiction:

Improvescheduling responsivenessVSAvoidpower consumption

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic monitoring of PDCCH on the scheduled carrier only during the scheduling carrier's active time periods. The terminal device monitors PDCCH periodically when the scheduling carrier is active and has scheduling information, rather than continuously, which reduces power consumption while maintaining scheduling responsiveness during active periods.

Inventive Principle:

Principle #19Periodic action

3Productivity

If the terminal activates the scheduled carrier whenever data needs transmission, then transmission efficiency is improved, but power management efficiency deteriorates

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidpower management efficiency

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent uses preliminary action by checking whether the scheduling carrier is active and has scheduling information before activating the scheduled carrier for data transmission. This preliminary check prevents unnecessary activation and ensures that the scheduled carrier is only activated when truly needed, improving both transmission efficiency and power management efficiency.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250185114A1Method and apparatus for determining activation moment of scheduled carrier, and device and medium

Publication Date: 2025.06.05 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

The present disclosure provides a communication method. The communication method includes: receiving, by a terminal supporting carrier aggregation, signaling configured to indicate that a scheduled carrier and a scheduling carrier belong to a same Discontinuous Reception (DRX) group; and determining, by the terminal, whether a current moment is active time of the scheduled carrier of the terminal according to a first DRX group to which the scheduling carrier of the terminal belongs.