TDD Switch Signal Synchronization With Error-Corrected Dual Switching
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Solution Overview
Problem
Existing TDD switch signal transmission technologies are complex, require significant optical fiber resources, and increase system costs due to cumbersome frame header recognition and pulse signal filtering, affecting synchronization accuracy and flexibility.
Innovation Solution
A system comprising a near-end device and a remote device that performs power-on detection and comparison of downlink TDD switch signals with standard signals, generating synchronized uplink and downlink switching signals while minimizing interference through delayed and advanced turning-off techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frame header recognition and pulse signal filtering are performed according to configured parameters, then synchronization accuracy is improved, but device complexity and optical fiber resources increase
Solution Approach 1:
The patent extracts only the essential switching timing information from the TDD switch signal by directly detecting the switching moments, eliminating the need for complex frame header recognition and pulse signal filtering processes while maintaining synchronization accuracy
Solution Approach 2:
Instead of verifying the generated signal according to configured parameters and calculating errors, the patent inverts the approach by directly detecting the switching signal characteristics and using that information to control the switching, thereby simplifying the verification process
2Reliability
If two synchronization signal frame headers are transmitted through two optical ports, then synchronization capability is improved, but optical fiber resources and device cost increase
Solution Approach 1:
The patent merges the transmission of synchronization information into a single optical path by using the existing TDD switch signal to carry switching timing information for both uplink and downlink, eliminating the need for separate optical ports and reducing fiber resource consumption
Solution Approach 2:
The TDD switch signal is given multi-functionality by using it not only for its original switching control purpose but also as a carrier for synchronization timing information, allowing one signal to serve multiple functions and reduce the need for additional dedicated synchronization channels
Data Source
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AI summary
The present disclosure discloses a remote device, a system and a method for transmission compatible with two TDD switch signals. The method includes: receiving a downlink TDD switch signal; performing a power-on detection on the downlink TDD switch signal; in the case of a successful power-on detection, generating a standard switch signal corresponding to the downlink TDD switch signal; receiving an information of a successful power-on detection and the standard switch signal; comparing the downlink TDD switch signal with the standard switch signal; in the case that a number of abnormal values between the downlink TDD switch signal and the standard switch signal is less than a set value N, outputting a first downlink switching switch signal, a first uplink switching switch signal, a second downlink switching switch signal, and a second uplink switching switch signal related to the downlink TDD switch signal. The disclosed system having a simple design can detect the switch signal, perform error correction on the wrong switch signal, and ensure the correctness of the switch signal.