PON Switch Unit Signal Interference Decoupling
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Solution Overview
Problem
Conventional passive optical networks face significant challenges in efficiently and automatically removing signal interference, which can cause network collapse and require time-consuming manual interventions, often disconnecting entire groups of users.
Innovation Solution
A method and apparatus that utilize identification signals uniquely associated with each optical network unit, where a switch unit detects and compares these signals with stored identification signals to decouple or maintain connection, ensuring automated interference removal without disconnecting entire groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual examination and disconnection of individual arms is performed to remove signal interference, then the interference can be eliminated, but the process is very time-consuming and leads to long network failure time
Solution Approach 1:
The system performs automatic detection and removal of signal interference without requiring manual technician intervention. The switching unit autonomously monitors identification signals from ONUs, compares them against stored identifiers, and automatically disconnects interfering units, enabling the network to self-diagnose and self-repair interference issues.
Solution Approach 2:
The system continuously monitors identification signals from ONUs and provides feedback to the switching unit. When a mismatch is detected between the transmitted identification signal and the stored identification signal, the system immediately responds by disconnecting the problematic ONU, creating a closed-loop control system that rapidly eliminates interference.
2Productivity
If automated detection and comparison of identification signals is implemented, then interference removal speed is improved, but device complexity increases due to switch units with detection and comparison capabilities
Solution Approach 1:
The switching unit is designed to perform multiple functions: it switches optical signals between the OLT and multiple ONUs, monitors identification signals from ONUs, compares these signals against stored identifiers, and automatically disconnects interfering units. By consolidating these diverse functions into a single multi-functional device, the patent avoids the need for separate dedicated components for each function, thereby managing complexity while achieving automation.
Solution Approach 2:
The patent combines the switching function, detection function, and comparison function into a single integrated switching unit. Rather than having separate devices for switching, monitoring, and decision-making, these functions are merged into one unit that operates autonomously to detect and remove signal interference.
3Ease of repair
If conventional manual interference removal methods are used, then equipment can be repaired, but the process requires service technician intervention and individual disconnection of arms
Solution Approach 1:
The system automatically detects signal interference by monitoring identification signals from ONUs and autonomously disconnects interfering units without requiring service technician intervention. This self-service capability simplifies the repair process by eliminating manual examination and individual disconnection of arms, allowing the network to automatically recover from interference incidents.
4Quantity of substance
If the same OLT and central cable are shared by multiple ONUs to increase network capacity, then more users can be connected, but interference from a single ONU can cause collapse of the entire access network
Solution Approach 1:
The patent logically segments the network monitoring and control functions at the switching unit level, allowing independent monitoring and disconnection of individual ONUs. This segmentation enables the system to isolate and remove interfering units without affecting other ONUs sharing the same OLT and central cable, thereby maintaining network stability while supporting multiple users.
Solution Approach 2:
The switching unit acts as an intermediary between the OLT and multiple ONUs, providing a control layer that monitors identification signals and autonomously manages connections. This intermediary function allows the system to maintain shared infrastructure for multiple users while preventing interference from propagating through the entire network by automatically isolating problematic units.
Data Source
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AI summary
A method for removing signal interference in a passive optical network, the passive optical network including an optical line terminal, a splitting unit coupled with the optical line terminal, an optical network unit coupled with the splitting unit, and an identification signal uniquely associated with the optical network unit; the method comprising the steps of sending a first signal, detecting the first signal, comparing the detected first signal with the identification signal and decoupling the optical network unit from the splitting unit if the comparing step results in a mismatch.