Sidelink PRS Scheduling Matched to SL-DRX Active Windows

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Solution Overview

Problem

In sidelink positioning, the SL-PRS receiver device may fail to receive and measure the SL-PRS during sleep time of sidelink discontinuous reception (SL-DRX) or incur excessive power consumption by forcibly waking up during sleep time.

Innovation Solution

The method involves configuring SL-PRS transmission and reception based on an SL-PRS configuration that matches the SL-DRX configuration, ensuring SL-PRS operations are performed during active times, thereby avoiding power wastage and reception failures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the SL-PRS receiver device forcibly wakes up during sleep time to receive SL-PRS, then the SL-PRS reception and measurement can be performed, but the power consumption increases excessively

Engineering Contradiction:

ImproveSL-PRS reception reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies dynamics by making the SL-PRS configuration adaptable to SL-DRX states. The SL-PRS receiver dynamically adjusts its reception behavior based on whether it is in active time or sleep time, allowing the system to transition between different operational modes to optimize both reliability and power consumption

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of SL-PRS configuration to match the SL-DRX configuration. By aligning the SL-PRS reception timing with the active time defined in SL-DRX configuration, the system ensures reliable reception during active periods while avoiding forced wake-ups during sleep periods, thus reducing power consumption

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If the SL-PRS receiver device does not perform reception during sleep time, then power consumption is reduced, but the SL-PRS reception and measurement fail

Engineering Contradiction:

Improvepower consumptionVSAvoidSL-PRS reception reliability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-configuring the SL-PRS receiver with the SL-DRX configuration before positioning operations begin. This allows the receiver to know in advance when active time periods occur, so it can prepare to receive SL-PRS during these periods without failing the reception

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent utilizes periodic action through the cyclic nature of SL-DRX active time periods. The SL-PRS transmission is scheduled to occur during these periodic active time windows, ensuring that the receiver can reliably detect and measure the SL-PRS signal without requiring continuous operation

Inventive Principle:

Principle #19Periodic action

3Adaptability or versatility

If SL-PRS configuration does not match SL-DRX configuration, then flexibility in positioning setup is improved, but reception failures occur during sleep time

Engineering Contradiction:

Improvepositioning configuration flexibilityVSAvoidSL-PRS reception reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies universality by making the SL-PRS configuration universally compatible with SL-DRX configuration. The matching relationship between SL-PRS and SL-DRX configurations creates a unified framework that works across different positioning scenarios and DRX parameter settings, providing both flexibility and reliability

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260046831A1Method for communicating sidelink positioning reference signal, and device

Publication Date: 2026.02.12 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

The present disclosure relates to the technical field of mobile communications. Disclosed are a method for communicating a sidelink positioning reference signal (SL-PRS), and a device. The method applicable to a sidelink (SL) communication receiver terminal. The method includes: transmitting or receiving the SL-PRS based on an SL-PRS configuration matching a sidelink discontinuous reception (SL-DRX) configuration.