Dynamic Time Assignment for FTTdp Near-End Crosstalk
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Solution Overview
Problem
In FTTdp CO equipment, asynchronous upstream and downstream time durations lead to near-end crosstalk and unstable signal transmission, affecting normal signal transmission in multi-port scenarios.
Innovation Solution
A dynamic time assignment method that synchronizes upstream and downstream time durations across multiple signals by adjusting the lengths of transmission durations based on traffic changes, using a DTA mechanism to ensure proper time allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic time assignment is implemented to allocate proper transmission duration based on traffic changes, then network adaptability and resource utilization are improved, but near-end crosstalk and signal instability occur due to asynchronous upstream and downstream time in multi-port scenarios
Solution Approach 1:
The patent merges the time duration configuration of upstream and downstream transmissions across multiple ports by introducing a unified configuration parameter that simultaneously controls both directions. This ensures that when dynamic time assignment adjusts transmission durations, all ports maintain synchronized timing relationships, preventing near-end crosstalk while preserving adaptability.
Solution Approach 2:
The patent applies local quality by allowing different ports to have different upstream and downstream time durations based on their specific traffic requirements, while simultaneously ensuring that within each port the upstream and downstream timings are properly coordinated. This localized configuration approach maintains both adaptability and signal stability.
2Productivity
If different upstream and downstream time durations are configured for each signal in multi-port FTTdp CO equipment, then individual signal optimization is achieved, but asynchronous timing between signals causes near-end crosstalk
Solution Approach 1:
The patent changes the parameter configuration approach by introducing a unified configuration parameter that controls both upstream and downstream time durations simultaneously. This parameter change ensures that while individual signals can be optimized, the timing relationships between upstream and downstream transmissions remain synchronized, eliminating near-end crosstalk.
Solution Approach 2:
The patent addresses asymmetry by creating a symmetric configuration mechanism where upstream and downstream timings are controlled together through a unified parameter. This symmetric control approach ensures that even though individual ports may have different time allocations, the upstream-downstream relationship remains balanced and synchronized across all signals.
Data Source
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AI summary
This application provides a dynamic time assignment method, apparatus, and system, and relates to the field of communications technologies. The method includes: Central office equipment and customer premise equipment obtain a length of a new downstream transmission duration. The central office equipment and the customer premise equipment first shorten a downstream transmission duration or an upstream transmission duration whose length needs to be shortened; and after lengths of all downstream transmission durations or all upstream transmission durations are shortened, prolong the length of the downstream transmission duration or the upstream transmission duration whose length needs to be prolonged. In this application, the foregoing manner avoids a near-end crosstalk problem caused by asynchronous ports during multi-port upstream time assignment.