Communication Repeater Synchronization Restoration for Shared Remote Units
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Solution Overview
Problem
In distributed antenna systems with shared remote units connected to multiple main units managed by different operators, synchronization errors can lead to communication quality degradation and service failures among the main units.
Innovation Solution
A communication repeater with a digital signal processor that measures delay times of test signals, performs synchronization restoration for downlink signals with errors, and reproduces correct signals to maintain synchronization across units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a shared RU is used to connect multiple MUs from different operators, then device sharing and resource utilization are improved, but synchronization errors can occur causing service failures
Solution Approach 1:
The patent implements a feedback mechanism where the RU continuously monitors synchronization status of signals from multiple MUs. When a synchronization error is detected in a downlink signal, the RU generates feedback information and transmits it to the corresponding MU. This enables the MU to identify and correct synchronization issues, thereby maintaining reliable operation while utilizing shared RU resources.
Solution Approach 2:
The system enables self-service through automatic synchronization error detection and correction. The RU autonomously monitors synchronization status, identifies erroneous signals, and triggers correction procedures without requiring external intervention. This self-service capability maintains service reliability while preserving the benefits of shared RU architecture.
2Reliability
If synchronization monitoring is continuously performed, then service reliability is improved, but processing complexity and energy consumption increase
Solution Approach 1:
The patent implements periodic synchronization monitoring rather than continuous monitoring. The RU performs synchronization checks at predetermined intervals by analyzing downlink signals from MUs at specific time points. This periodic approach maintains adequate synchronization reliability while significantly reducing processing complexity and energy consumption compared to continuous monitoring.
3Reliability
If synchronization errors are detected and corrected in real-time, then communication quality is improved, but processing time and system complexity increase
Solution Approach 1:
The patent extracts and isolates the synchronization monitoring and error detection functions into a dedicated module within the RU. This separate functional block specifically handles synchronization analysis, error detection, and feedback generation. By extracting these functions, the system improves communication quality through real-time error correction while managing processing complexity through functional specialization and modular design.
Data Source
AI summary
Provided is a communication repeater including a receiver configured to receive a plurality of test signals from a plurality of external communication devices and then receive a plurality of downlink signals from the plurality of external communication devices, and a digital signal processor configured to measure a delay time of each of the plurality of test signals and perform a delay synchronization process for the plurality of downlink signals, wherein the digital signal processor is configured to determine whether the plurality of downlink signals for which the delay synchronization process has been performed are synchronized, and perform synchronization restoration for a downlink signal having a synchronization error among the plurality of downlink signals, based on a result of the determining.