Wireless Terminal Transmission Timing Synchronization

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Solution Overview

Problem

In wireless networks, independently operating terminals struggle to synchronize their signal transmissions, leading to timing deviations that hinder cooperative communication and reception performance.

Innovation Solution

A method where a terminal adjusts the transmission time points of other terminals by sending request frames with timing information, receiving response frames, calculating arrival time differences, and retransmitting adjusted timing information to ensure signals arrive within an allowable error range, facilitating synchronized transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If terminals operate independently without centralized control, then device autonomy and ease of operation are improved, but timing synchronization and reception performance deteriorate

Engineering Contradiction:

Improveterminal autonomyVSAvoidtiming synchronization

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

Each terminal independently measures its own signal arrival time differences and calculates its required transmission time adjustment, rather than requiring centralized control. The terminal autonomously determines its position in the virtual queue and sets its transmission time based on local measurements of signal arrivals from other terminals.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system uses feedback from measured signal arrival times to adjust transmission timing. Each terminal monitors when signals from other terminals arrive, compares this to expected timing, and adjusts its own transmission time accordingly to achieve synchronized arrivals at the target terminal.

Inventive Principle:

Principle #23Feedback

2Manufacturing precision

If transmission time points are adjusted through iterative request-response frames, then timing synchronization accuracy is improved, but communication overhead and time consumption increase

Engineering Contradiction:

Improvetransmission timing accuracyVSAvoidsynchronization setup time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The system performs preliminary timing measurements and calculations before actual data transmission begins. Terminals exchange timing information frames in advance to establish their transmission schedules, allowing the actual data transmission to proceed without further timing adjustments.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system changes the transmission time parameter iteratively based on measured arrival time differences. Each terminal adjusts its transmission time offset parameter according to the measured timing errors, converging to the optimal synchronized timing through successive refinements.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP3451778B1Method and apparatus for adjusting signal transmission starting point of terminal in wireless network

Publication Date: 2021.02.24 CHUNG

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AI summary

Disclosed is a method for adjusting a transmission time point of at least one second terminal in a wireless network by a first terminal. In the method for adjusting a transmission time point of a terminal, a transmission time point of the second terminal is set, a first frame including information regarding the transmission time point is transmitted to the second terminal, a first response frame transmitted according to the transmission time point from the second terminal is received, and the transmission time point is adjusted according to an arrival time of the first response frame.