UE Uplink Sampling Timing for Lower Configured-Grant Latency

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Solution Overview

Problem

Wireless communication systems experience latency issues during periodic uplink data transmissions, particularly in scenarios like vehicle-to-everything (V2X) networks, voice-over-cellular technology, and voice/video communications using configured grants, due to inefficiencies in resource selection and scheduling.

Innovation Solution

User equipment (UE) detects latency and provides information indicative of the latency to the application layer, allowing the layer to adjust data sampling times or instructions to reduce latency by optimizing the timing of uplink data transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If periodic transmission resources are used for uplink data, then resource scheduling is simplified, but latency increases due to misalignment between data generation and transmission opportunities

Engineering Contradiction:

Improvescheduling complexityVSAvoidtransmission latency

Core Design Contradiction:

Device complexityVSLoss of time

Solution Approach 1:

The system implements feedback by measuring the latency between data generation and transmission, then using this latency information to adjust the sampling time at the application layer. This closed-loop feedback mechanism allows the system to adapt to the periodic transmission resource constraints while minimizing latency accumulation.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The invention changes the sampling time parameter at the application layer based on measured latency values. By dynamically adjusting when data is sampled and prepared for transmission, the system aligns data availability with periodic transmission opportunities, reducing the waiting time without changing the transmission resource pattern.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If data sampling time is fixed, then application processing is simplified, but latency cannot be optimized for periodic transmission resources

Engineering Contradiction:

Improveprocessing simplicityVSAvoidtransmission latency

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The system transitions from a static fixed sampling time to a dynamic adjustable sampling time. The sampling time is modified based on measured latency and the periodic transmission resource pattern, allowing the system to adapt to varying conditions while maintaining relatively simple processing logic through automated adjustment.

Inventive Principle:

Principle #15Dynamics

3Productivity

If transmission resources are allocated periodically, then resource management is more efficient, but latency occurs when data is ready outside transmission windows

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoiddata waiting time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The system performs preliminary action by adjusting the sampling time in advance to ensure data is ready exactly when transmission resources become available. By proactively modifying when data is generated or prepared, the system eliminates waiting time without requiring additional transmission resources or changing the periodic allocation pattern.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12477567B2Reduction of latency in wireless communication systems

Publication Date: 2025.11.18 APPLE INC

AI summary

Disclosed are methods, systems, and computer-readable medium to perform operations including: receiving, from an application layer of a user equipment (UE), a first uplink packet at a first time; identifying a latency between the first time and a first instance of a periodic transmission resource during which the first uplink packet is transmitted by the UE; and providing information indicative of the latency to the application layer of the UE.