Offset Pass-Through Fiber Optic Connectivity for Data Center Cabling
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Solution Overview
Problem
Current data center network topologies face challenges in scalability, maintenance, and cost due to complex cabling and high oversubscription ratios, particularly in supporting West-East traffic, and existing solutions like fat-tree and folded Clos architectures are cumbersome and costly to implement and maintain.
Innovation Solution
A connectivity system using offset pass-through fiber optic connections and bidirectional fiber constructs simplifies cabling, reduces the number of cables needed, and eliminates the need for multiplexers/demultiplexers, allowing for the implementation of complex topologies like mesh rings and flattened butterfly architectures with fewer physical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fat-tree or folded Clos architectures are used to reduce oversubscription ratio and improve West-East traffic, then network performance is improved, but device complexity and cabling complexity increase
Solution Approach 1:
The patent segments the network into hierarchical layers (core layer with high-capacity routers, aggregation layer with medium-capacity switches, access layer with TOR switches). Each layer handles specific traffic types and capacities, allowing West-East traffic to be routed through multiple segments rather than requiring all nodes to be directly interconnected. This segmentation reduces cabling complexity while maintaining performance.
Solution Approach 2:
The patent introduces hierarchical dimensioning to the network architecture, organizing nodes across multiple levels (core, aggregation, access) rather than in a single flat plane. This dimensional organization allows traffic to flow through vertical and horizontal paths in the hierarchy, reducing the need for extensive horizontal cabling while maintaining low-latency paths for West-East traffic.
2Quantity of substance
If more switches are used to implement fat-tree or folded Clos architectures, then network capacity increases, but cost and complexity increase
Solution Approach 1:
The patent designs switches at each hierarchical level to perform multiple functions: aggregation switches handle both East-West traffic routing and North-South traffic aggregation, core routers provide both high-capacity backbone routing and gateway functions, and TOR switches serve both server connectivity and aggregation purposes. This multi-functionality reduces the total number of specialized devices needed while maintaining network capacity.
Solution Approach 2:
The patent merges certain functions into single devices to reduce overall device count. For example, aggregation switches combine the functions of traditional core and distribution layers, and core routers integrate high-speed routing with gateway capabilities. This consolidation maintains network capacity while reducing the number of discrete switches and routers required.
3Speed
If optical cabling is used to increase speed and throughput, then network speed is improved, but installation and maintenance complexity increase
Solution Approach 1:
The patent segments optical cabling into hierarchical sections corresponding to network layers: short-reach optical cables within access layers, medium-reach cables between aggregation and core layers, and long-reach cables for core backbone connections. This segmentation allows appropriate cable types and lengths to be used at each level, simplifying installation and maintenance while maintaining high speeds.
Solution Approach 2:
The patent introduces optical multiplexers and demultiplexers as intermediary devices that enable wavelength-division multiplexing (WDM) on optical cables. This allows multiple data streams to traverse the same physical cable simultaneously at different wavelengths, increasing throughput without requiring additional cable installations, thereby simplifying physical infrastructure while maintaining high speed capacity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces cabling complexity and costs, enhances scalability, and facilitates faster, more reliable implementation of complex network topologies, enabling efficient data center network configurations with reduced component requirements.
Implementation Method 1
A connectivity arrangement is provided at a network node that includes fiber optic transmitters and receivers
Implementation Method 2
The connectivity configuration provides for pass-through fiber connections that are passive and that offer an optical signal path that is offset or shifted by one or more connector positions as the optical signal passes through the node
Data Source
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AI summary
A system and method for connectivity configuration of a network node permits an optical signal to be passed through the node and shifted from a first connector position to a second connector position that is offset from the first connector position. The shifted optical signal permits a number of distant nodes in the network to be reached with a direct optical connection, which can be configured to be bidirectional. The disclosed connectivity configuration reduces the cabling requirements for the network and simplifies the interconnections.