Distributed Split Configuration for Multi-Dwelling Unit Fiber Routing
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Solution Overview
Problem
Fiber optic distribution systems in multi-dwelling units face challenges in reducing installation costs and time, particularly in extending fiber optic networks to multiple floors, where existing systems are inefficient and costly due to complex cable management and splitter configurations.
Innovation Solution
A fiber distribution system featuring a bundle of optical fibers with staggered lengths, a reinforced sheath body for axial stability, and splitter modules at both the enclosure and terminal levels, allowing for incremental subscriber connections and simplified routing through a sheath assembly with pre-connectorized ends and ferrules, reducing the need for immediate connector installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fiber optic distribution terminals are installed at separate floors and connected through cables to a network hub, then subscriber access is provided, but installation cost and time increase due to complex cable management
Solution Approach 1:
The patent combines multiple optical fibers into a single bundled cable that runs through the building, eliminating the need for separate cable runs from each floor to a central hub. The bundle includes fibers of different lengths that are pre-configured and protected by a common sheath, simplifying installation by reducing the number of individual cable management tasks required.
Solution Approach 2:
The optical fibers are pre-connectorized at one end with connectors and at the other end with ferrules before being bundled together. This preliminary preparation allows for faster on-site installation as the fibers are ready-to-connect upon arrival at the destination, eliminating the need for field termination and reducing installation time.
2Productivity
If traditional fiber distribution systems are used in multi-dwelling units, then network coverage is achieved, but installation time and cost increase
Solution Approach 1:
The optical fibers are pre-connectorized at both ends (connectors at one end, ferrules at the other) and pre-bundled with appropriate length differentiation before deployment. This advance preparation significantly reduces on-site installation time as workers only need to connect pre-configured components rather than terminate fibers in the field.
Solution Approach 2:
The self-service feature is implemented through the pre-connectorized design where the fibers come ready-to-connect with connectors and ferrules already in place. The system essentially installs itself by requiring minimal field assembly, with the bundled structure and length differentiation enabling automatic proper routing and connection without extensive manual configuration.
3Reliability
If optical fibers are routed through building floors to distribution terminals, then network access is provided, but the sheath assembly experiences strain
Solution Approach 1:
The patent applies different structural characteristics to different parts of the fiber bundle. The sheath body is designed with reinforced sections at critical points where strain occurs during installation and use, while maintaining flexibility in other sections. The staggered ferrule arrangement within the bundle provides local stress distribution, preventing concentrated loads on the sheath.
Solution Approach 2:
The sheath assembly is designed with built-in strain relief features and protective elements positioned beforehand to cushion against installation stresses. The reinforced sheath structure and proper routing design anticipate and mitigate strain before it can damage the fibers, ensuring reliability while protecting the structural integrity of the assembly.
Data Source
AI summary
Installing a fiber distribution system in a building having multiple floors includes routing a feed fiber to a first enclosure located at one of the floors of the building; disposing pre-connectorized ends of distribution fibers within the first enclosure; routing optical ferrules, which terminate second ends of the distribution fibers without connector bodies, through the building via a sheath; accessing the optical ferrules of the distribution fibers at respective floors; attaching connector bodies around the optical ferrules; and disposing the connector bodies within fiber distribution terminals at the appropriate floors.