TDD Synchronization via Signal-Quality Filtering in Wireless Repeaters
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Solution Overview
Problem
Conventional wireless communication systems face challenges in maintaining precise time division duplexing (TDD) synchronization, particularly in environments with interference, signal blockage, and timing drift, which are exacerbated by the introduction of additional access points or relay nodes, leading to reduced performance and increased complexity.
Innovation Solution
A system and method utilizing a master access point and hybrid analog-digital repeater devices for TDD synchronization, employing signal quality indicator data processing and artificial neural networks to adjust timing, ensuring precise synchronization across a wireless network, even in challenging environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If additional wireless access points or relay nodes are introduced to extend communication range, then coverage area is improved, but timing drift errors and synchronization errors increase
Solution Approach 1:
The patent introduces a master access point as an intermediary that provides centralized timing synchronization to all repeater devices. This master device acts as a reference clock source, and all other devices synchronize their TDD operations to it, preventing timing drift accumulation that would otherwise occur in distributed synchronization schemes.
Solution Approach 2:
The system implements feedback mechanisms where repeater devices monitor signal quality indicator data and transmit timing adjustment signals back to the master access point. This feedback loop enables continuous correction of synchronization errors, maintaining precision even as the network expands to cover larger areas.
2Device complexity
If traditional TDD synchronization methods are used, then implementation is simpler, but the system is susceptible to timing drift due to environmental factors and network congestion
Solution Approach 1:
The patent implements continuous feedback loops where signal quality indicator data is monitored and used to generate timing adjustment signals. This feedback mechanism actively compensates for timing drift caused by environmental factors and network congestion, significantly improving synchronization reliability compared to traditional methods.
Solution Approach 2:
The system employs self-service mechanisms where repeater devices automatically adjust their own timing based on received synchronization signals and signal quality measurements. Each device independently corrects its timing without requiring manual intervention, maintaining reliability while keeping the overall system manageable in complexity.
3Measurement precision
If signal quality monitoring and filtering is implemented, then synchronization accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent applies partial filtering by selectively processing only the most relevant signal quality indicator data rather than analyzing every possible parameter. This approach achieves sufficient synchronization accuracy without implementing overly complex filtering algorithms, maintaining a practical balance between precision and processing complexity.
Data Source
AI summary
A system for time division duplexing (TDD) synchronization in a wireless network includes a master access point (MAP) device configured to periodically transmit a synchronization signal to one or more repeater devices of a plurality of repeater devices. The system includes a repeater device configured to monitor signal quality indicator data associated with the synchronization signal received from the MAP device and filter the signal quality indicator data to remove transient fluctuations indicative of noise. The repeater device determines an average from the filtered signal quality indicator data over a time window and generates timing adjustment signals. The repeater device controls TDD switch to generate a TDD signal and adjusts timing edges of the generated TDD signal to maintain synchronization with the MAP device.