Communication Repeater Timing Synchronization
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Solution Overview
Problem
In shared repeater systems using Time Division Duplex (TDD) radio transmission, 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 precision time protocol (PTP) and absolute reference timing signals from GPS, terrestrial digital tuners, or atomic clocks to synchronize time across base station systems and slave station devices, reducing interference and ensuring consistent service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If TDD radio transmission is adopted to increase device capacity, then the number of devices supported increases, but variations in time-division timing among different service providers cause mutual interference and service quality deterioration
Solution Approach 1:
The patent applies equipotentiality by establishing a common time reference level for all service providers in the shared repeater system. The master station device distributes synchronized timing signals to all slave station devices, ensuring that all operators switch transmission and reception at the same time points. This equalizes the timing potential across different service providers, eliminating the timing variations that cause mutual interference while maintaining high device capacity.
2Productivity
If multiple service providers share a repeater system, then resource utilization improves, but timing variations among providers cause mutual interference and service stoppages
Solution Approach 1:
The patent implements feedback through a centralized timing synchronization mechanism. The master station device continuously monitors and distributes precise timing signals to all slave station devices operated by different service providers. This feedback loop ensures that all providers adhere to the same time-division timing, preventing mutual interference while enabling efficient shared resource utilization across multiple operators.
3Device complexity
If time-division switching is performed without precise synchronization, then system complexity is reduced, but variations in switching timing cause transmission and reception waves to interfere with each other
Solution Approach 1:
The patent introduces an intermediary timing synchronization mechanism mediated by the master station device. This intermediary distributes standardized timing signals to all slave station devices, acting as a neutral mediator that coordinates the transmission and reception switching of different service providers. This intermediary layer prevents direct interference between providers while maintaining relatively simple individual device structures.
Data Source
AI summary
According to one embodiment, a communication repeater system includes a master station device and radio frequency units. The radio frequency units each convert a signal from each of base station system into an optical digital signal for transmission to the master station device. The base station systems establish communication by time division duplex scheme. The communication repeater system repeats communication between a mobile communication terminal device and each base station system via a corresponding one of slave station devices, and includes a detector that detects each of transmission/reception switching timings between the master station device and each of the radio frequency units, a setter that sets, as reference transmission/reception switching timing, a latest one of the transmission/reception switching timings of the radio frequency units as candidates of reference transmission/reception switching timing, and a corrector that corrects variation in the transmission/reception switching timings according to the reference transmission/reception switching timing.