Radio Node Synchronization Accuracy via Local Reference Signal
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Solution Overview
Problem
In radio access networks with separate baseband and radio sections, high synchronization accuracy and delay management are required between nodes, but the accuracy of synchronization signals generated by the baseband processing unit may deteriorate before reaching the radio unit, affecting communication quality.
Innovation Solution
A radio node with a first processing section to receive synchronization signals and a second processing section to generate a reference signal from a time signal source, allowing for synchronization processing based on a comparison result between the received signal and the reference signal, thereby enhancing synchronization accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the O-DU generates synchronization signal based on reference signal, then synchronization processing can be executed, but accuracy of synchronization signal deteriorates before O-RU receives it
Solution Approach 1:
The O-RU performs preliminary actions by acquiring time signals from external time signal sources (such as GPS) and generating local reference signals in advance. This preliminary preparation enables the O-RU to independently verify and correct synchronization signals before they deteriorate during transmission, thereby maintaining high synchronization accuracy throughout the signal path from O-DU to O-RU
Solution Approach 2:
The invention implements a feedback mechanism where the O-RU compares the received synchronization signal from the O-DU against its locally generated reference signal. This comparison creates a feedback loop that allows the O-RU to detect accuracy deterioration and take corrective actions, ensuring reliable synchronization even when signal quality degrades during transmission
Data Source
AI summary
In order to execute processing relating to synchronization based on a synchronization signal, a radio node 200 includes: a first processing section 211 configured to receive a synchronization signal transmitted from a first node 100; and a second processing section 212 configured to generate a reference signal by using a time signal acquired from a time signal source, and execute processing relating to synchronization in accordance with a comparison result based on the synchronization signal and the reference signal.