Wireless Propagation Delay Compensation for UE Alignment

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless communication technologies face challenges in accurately compensating for propagation delays, particularly in scenarios with large cell deployments, leading to misalignments in UE transmissions and reduced spectral efficiency.

Innovation Solution

Implement methods for propagation delay compensation (PDC) by enabling mobile devices to report their capabilities, allowing network nodes to determine and indicate when PDC is necessary, and using timing advance values to adjust transmissions, along with configuring subcarrier spacings for improved synchronization accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If propagation delay compensation is implemented in wireless communication networks, then transmission alignment and spectral efficiency are improved, but device complexity and implementation requirements increase

Engineering Contradiction:

Improvespectral efficiencyVSAvoidimplementation complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The mobile device autonomously determines whether to perform propagation delay compensation by reporting its capability information to the communication node. The device independently calculates timing advance values and adjusts its transmission timing without requiring complex network-side processing, thereby improving spectral efficiency while limiting the increase in overall system complexity to primarily client-side operations

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system dynamically adjusts the timing advance parameter based on the mobile device's capability and the network conditions. By changing the timing parameter adaptively rather than using fixed complex processing, the system achieves improved transmission alignment and spectral efficiency with relatively simple implementation

Inventive Principle:

Principle #35Parameter changes

2Reliability

If timing advance values are used for propagation delay compensation, then transmission alignment is improved, but measurement precision requirements increase

Engineering Contradiction:

Improvetransmission alignmentVSAvoidtiming measurement precision

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The communication node acts as an intermediary that provides reference time information to the mobile device. Instead of the device directly measuring and compensating for propagation delays with high precision requirements, the device uses the reference time information and timing advance values provided by the communication node to achieve alignment, thereby reducing the measurement precision burden on the mobile device while maintaining reliable transmission alignment

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12418873B2Methods and systems for propagation delay compensation in wireless communication networks

Publication Date: 2025.09.16 ZTE CORP

AI summary

Disclosed are devices, systems and methods for propagation delay compensation in wireless communications. In some implementations, a data communication method includes receiving, by a mobile device, reference time information; and performing, upon determination that the mobile device has a capability for a propagation delay compensation, by the mobile device, the propagation delay compensation on the reference time information.