UE Synchronization Signal Timing Adjustment to Reduce Interference

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Solution Overview

Problem

Existing wireless communication systems face challenges in synchronizing transmission timing of synchronization signals effectively, particularly in scenarios involving multiple user equipment devices, leading to inefficiencies and potential interference.

Innovation Solution

The method involves adjusting the transmission time of a synchronization signal based on the reception time of a second synchronization signal received from another user equipment device, allowing for synchronized transmission timing adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple user equipment devices transmit synchronization signals simultaneously without timing adjustment, then each device can independently maintain its transmission timing, but synchronization accuracy deteriorates and interference increases among devices

Engineering Contradiction:

Improvesynchronization accuracyVSAvoidinterference among devices

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent implements a feedback mechanism where user equipment receives synchronization signals from other devices, measures their timing, and adjusts its own transmission timing based on this feedback. This closed-loop approach ensures synchronization accuracy while minimizing interference through dynamic timing coordination.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The transmission timing of synchronization signals is made dynamic rather than static. User equipment continuously adjusts its transmission timing based on received signals from other devices, allowing the system to adapt to changing conditions and maintain optimal synchronization while reducing interference.

Inventive Principle:

Principle #15Dynamics

2Measurement precision

If user equipment adjusts transmission timing based on received synchronization signals, then synchronization accuracy improves, but device complexity increases due to additional timing measurement and adjustment mechanisms

Engineering Contradiction:

Improvesynchronization timing precisionVSAvoidtiming measurement and adjustment complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

User equipment performs self-adjustment of transmission timing using its own processing capabilities. Each device independently measures received synchronization signals and autonomously adjusts its timing without requiring complex external control systems, thereby improving precision while limiting complexity growth.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent changes the timing parameter of synchronization signals dynamically. By adjusting the transmission timing parameter based on measured reception times, the system achieves higher synchronization precision through parameter optimization rather than through complex structural modifications.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12490204B2Adjusting transmission timing of a synchronization signal based on a received synchronization signal timing

Publication Date: 2025.12.02 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive, from a second UE, a second synchronization signal at a reception time. The first UE may adjust a transmission time of a first synchronization signal, resulting in an adjusted transmission time, wherein the adjusted transmission time is based at least in part on the reception time of the second synchronization signal. The first UE may transmit the first synchronization signal at the adjusted transmission time. Numerous other aspects are described.