TDD Repeater Timing Synchronization via Reference Selection
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Solution Overview
Problem
In shared repeater systems using the TDD radio transmission scheme, variations in time-division timing among different service providers cause mutual interference and deterioration in service quality or service stoppages.
Innovation Solution
A communication repeater system comprising a master station device and radio frequency units that detect and correct variations in transmission and reception switching timings using a timing detector, protection level detector, setter, and corrector, ensuring synchronization and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TDD radio transmission scheme is adopted in shared repeater system, then frequency utilization is improved, but variations in time-division timing among different service providers cause mutual interference and service quality deterioration
Solution Approach 1:
The master station device detects transmission/reception switching timings from multiple base station systems and uses this feedback information to determine a reference timing. This feedback mechanism allows the system to automatically adjust and synchronize timing across different service providers, preventing mutual interference while maintaining high frequency utilization through TDD scheme
Solution Approach 2:
The invention equalizes the transmission/reception switching timings among different service providers by establishing a common reference timing. This equipotential approach ensures that all base station systems operate at the same timing level, eliminating timing variations that cause interference while preserving the frequency efficiency benefits of TDD
2Adaptability or versatility
If multiple base station systems from different service providers are connected to shared repeater, then service coverage is improved, but timing variations cause mutual interference and service stoppages
Solution Approach 1:
The master station device acts as an intermediary between multiple base station systems from different service providers. It detects timing information from each provider and mediates by establishing a unified reference timing, allowing diverse systems to coexist without interference while maintaining expanded service coverage through the shared repeater infrastructure
3Device complexity
If transmission and reception switching timings are not synchronized, then system complexity is reduced, but mutual interference occurs and service quality deteriorates
Solution Approach 1:
The master station device performs self-service by automatically detecting transmission/reception switching timings from base station systems and autonomously determining the reference timing. This self-service mechanism achieves timing synchronization without requiring complex external synchronization infrastructure, maintaining low system complexity while ensuring service quality through automatic timing coordination
Data Source
AI summary
According to one embodiment, a communication repeater system repeats communication by time division duplex scheme. The system includes a timing detector that detects each of transmission/reception switching timings between a master station device and each of radio frequency units, a protection level detector that detects a level of synchronization protection of each of base station systems, a setter that sets, as reference transmission/reception switching timing, a transmission/reception switching timing corresponding to one of the base station systems having a higher level of synchronization protection among the transmission/reception switching timings on the basis of a result of the detection by the protection level detector, and a corrector that corrects a variation in the transmission/reception switching timings in accordance with the reference transmission/reception switching timing.