TDD Repeater Synchronization via Signal Pattern Matching
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Solution Overview
Problem
In communication systems, repeaters operating in TDD mode face challenges in synchronizing with base stations due to the lack of effective synchronization mechanisms, which can lead to interference and scheduling failures.
Innovation Solution
A repeater and synchronization method that utilize a predetermined TDD configuration to generate and compare signal patterns, calculate timing offsets, and regenerate signals to synchronize with the base station, enabling precise alignment of downlink and uplink transmission durations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a repeater operates in TDD mode without a synchronization mechanism, then the repeater can amplify and transmit signals, but synchronization failures and interference occur between uplink and downlink transmissions
Solution Approach 1:
The patent applies preliminary action by detecting the TDD configuration pattern and calculating timing offsets before actual signal transmission begins. The repeater performs synchronization detection on downlink signals to establish the uplink-downlink pattern in advance, ensuring that subsequent transmissions are properly synchronized and avoid interference.
Solution Approach 2:
The patent implements feedback by continuously monitoring the received signal patterns and comparing them against the detected TDD configuration. The system uses the timing offset calculations as feedback to adjust its transmission timing, creating a closed-loop synchronization mechanism that maintains reliable operation.
2Measurement precision
If traditional UE synchronization methods are used by the repeater, then frame timing can be obtained, but the repeater cannot properly synchronize TDD uplink and downlink transmissions
Solution Approach 1:
The patent applies dynamics by making the synchronization method adaptable to different TDD configurations rather than using a fixed procedure. The repeater dynamically detects the specific TDD pattern (different uplink-downlink assignments) and adjusts its synchronization approach accordingly, enabling versatility across multiple configuration types while maintaining precise timing detection.
Solution Approach 2:
The patent achieves universality by creating a synchronization mechanism that works across different TDD configurations and scenarios. The same basic detection and timing offset calculation approach can handle various uplink-downlink patterns, making the solution broadly applicable to different network deployments and configuration scenarios.
3Productivity
If the repeater transmits without calculating timing offsets, then signal transmission can proceed, but transmission timing misalignment occurs with the base station
Solution Approach 1:
The patent applies preliminary action by calculating timing offsets before signal transmission begins. The repeater performs detection and calculation operations in advance to establish the correct timing relationship with the base station, ensuring that subsequent transmissions are precisely synchronized without causing or experiencing interference.
Data Source
AI summary
A repeater and a synchronization method for the same are provided. The synchronization method includes: configuring a base station to transmit an input signal during downlink transmission durations according to a time division duplex (TDD) configuration, in which the TDD configuration defines a predetermined pattern composed of an uplink transmission duration and a downlink transmission duration; configuring a processor generate a received signal code according to the input signal; configuring the processor to sample the received signal code by using a signal window to generate a target pattern; configuring the processor to dynamically compare the target pattern with the predetermined pattern according to the TDD configuration, positions of the received downlink transmission durations and positions of the received uplink transmission durations stored in a memory of the repeater, and determine whether the target pattern matches to the predetermined pattern.