Sidelink DRX/DTX Timing Alignment for Resource Scheduling

Solution Overview

Problem

Existing sidelink communication systems face resource waste due to misalignment between Uu and SL interface DRX/DTX active times, leading to allocated resources falling within inactive periods.

Innovation Solution

The method involves updating the DRX and/or DTX active times of sidelink communication interfaces by transmitting and receiving terminals after sending scheduling requests or buffer status reports, ensuring active times align with resource allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If DRX and DTX mechanisms are introduced for power saving, then energy consumption is reduced, but resource utilization deteriorates due to misalignment between Uu and SL interface active times

Engineering Contradiction:

Improvepower savingVSAvoidresource waste

Core Design Contradiction:

Use of energy by moving objectVSLoss of energy

Solution Approach 1:

The transmitting terminal updates the DRX active time and DTX active time before the resource allocation occurs, ensuring that the receiving terminal is in active state to receive the scheduled resources. This preliminary action prevents resource waste by guaranteeing that resources are not allocated during inactive periods

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The transmitting terminal provides feedback information to the receiving terminal about the updated DRX and DTX active times. This feedback mechanism allows the receiving terminal to adjust its active/inactive periods accordingly, ensuring synchronization and preventing resource allocation during inactive periods

Inventive Principle:

Principle #23Feedback

2Use of energy by moving object

If DRX and DTX mechanisms are introduced for power saving, then energy consumption is reduced, but communication reliability deteriorates due to resource allocation during inactive periods

Engineering Contradiction:

Improveenergy consumptionVSAvoidcommunication reliability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The transmitting terminal updates the DRX active time and DTX active time before the resource allocation occurs, ensuring that the receiving terminal is in active state to receive the scheduled resources. This preliminary action prevents resource waste by guaranteeing that resources are not allocated during inactive periods

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The transmitting terminal provides feedback information to the receiving terminal about the updated DRX and DTX active times. This feedback mechanism allows the receiving terminal to adjust its active/inactive periods accordingly, ensuring synchronization and preventing resource allocation during inactive periods

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12588103B2Method for maintaining DRX and/or DTX state of sidelink communication interface, and sidelink communication terminals

Publication Date: 2026.03.24 DATANG MOBILE COMM EQUIP CO LTD

AI summary

The present application provides a method for maintaining a DRX and/or DTX state of a sidelink communication interface and sidelink communication terminals. After a sidelink communication transmitting terminal sends a scheduling request SR or a buffer status reporting BSR corresponding to a sidelink communication interface to a network device, the sidelink communication transmitting terminal updates DRX and/or DTX active time of the sidelink communication interface, and the sidelink communication transmitting terminal is in the DRX and/or DTX active time at the sidelink communication interface within a first preset time period.