Optical Fibre Splitter Network with Automatic Fibre Management Unit
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Solution Overview
Problem
Existing optical fibre access networks face challenges in testing individual subscriber lines due to unreliable OTDR methods and high costs associated with adding new subscribers, as current splitter systems make it difficult to manage signal split ratios and require extensive cable installations.
Innovation Solution
An optical fibre transmission distribution assembly with remotely controllable optical signal split ratio management, featuring a first splitter with a split ratio of 1:x, a second splitter with a split ratio of 1:y, and an automatic fibre management unit (AFM) that allows for the transfer of optical drop cables to further split signals, enabling flexible subscriber connection points and independent testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single 1:64 centralised splitter is used, then the signal split ratio is achieved, but testing of individual subscriber lines becomes unreliable and adding new subscribers becomes expensive and complex
Solution Approach 1:
The patent divides the single 1:64 splitter into multiple stages: a first splitter (e.g., 1:8 or 1:16) and second splitters (e.g., 1:8 each), creating a hierarchical structure. This segmentation allows individual subscriber lines to be tested by isolating specific branches, improving measurement precision while maintaining manageable system complexity through modular architecture.
Solution Approach 2:
The patent introduces an automatic fibre management unit (AFMU) as an intermediary device that automatically connects and disconnects subscriber lines from the splitter output. This mediator enables reliable testing by isolating individual lines and simplifies adding new subscribers by providing automated connection management, reducing both testing unreliability and operational complexity.
2Adaptability or versatility
If all 64 subscriber connections are already occupied, then the current network capacity is utilized, but adding an extra line requires expensive infrastructure installation and multiple technician visits
Solution Approach 1:
The patent implements dynamic reconfigurability through the AFMU, which can automatically connect new subscriber lines to available splitter ports. When a new subscriber is added, the system dynamically reallocates capacity from the multi-stage splitter structure without requiring physical infrastructure changes. This dynamic capability provides high adaptability for subscriber addition while maintaining ease of manufacture by eliminating costly installation procedures.
Solution Approach 2:
The multi-stage splitter structure with AFMU provides universal functionality that serves both existing and new subscribers. The system can accommodate additional subscribers by utilizing unused ports in the splitter hierarchy or by dynamically reconfiguring connections, making the infrastructure versatile for various subscriber addition scenarios without requiring dedicated installation teams or multiple technician visits.
3Adaptability or versatility
If a distributed splitter network with multiple stages is used, then flexibility in signal distribution is improved, but the system complexity and difficulty in managing split ratios increases
Solution Approach 1:
The patent incorporates an AFMU that provides automated feedback control for managing the distributed splitter network. The unit monitors the state of splitter ports and automatically configures connections to achieve the desired split ratios. This feedback mechanism simplifies the management of complex multi-stage splitter networks by eliminating manual configuration, reducing device complexity while preserving signal distribution flexibility.
Solution Approach 2:
The AFMU enables the splitter network to self-configure and self-manage by automatically establishing connections between subscribers and splitter outputs based on predefined split ratio requirements. This self-service capability allows the distributed splitter network to maintain optimal signal distribution without external intervention, reducing operational complexity while preserving the flexibility benefits of the multi-stage architecture.
Data Source
AI summary
An optical fiber transmission distribution assembly, wherein the assembly comprises at least a first splitter having a first split ratio of 1:x (where x is an integer) connected to optical drop cables leading to subscribers, and at least a second splitter having a second split ratio of 1:y (where y is an integer and is different from x), and transfer means whereby an optical drop cable connected to the first splitter can be transferred to receive split optical signals from the second splitter, thereby enabling the signal in the transferred drop cable to be further split by addition of a third splitter at a ratio of 1:p (where p is an integer), to provide p subscriber connection points each having a 1:p*y split ratio at the subscriber end of the transferred drop cable.