Orthogonal Network Device Chassis with Busbar Power Distribution
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Solution Overview
Problem
Network devices, such as switches, face challenges in compact design and airflow due to traditional backplane implementations, which limit the number of devices that can be installed in racks and hinder cooling efficiency.
Innovation Solution
The network device employs an orthogonal arrangement of line cards and switch cards with power supplies positioned in-line, utilizing a busbar for centralized power distribution, which reduces device height and enhances airflow by separating power components and allowing for more efficient interconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If traditional backplane implementations are used, then component interconnection is achieved, but device height increases and airflow is restricted
Solution Approach 1:
The patent transitions from a traditional planar backplane layout to a three-dimensional orthogonal arrangement where line cards and switch cards are positioned at right angles to each other. This dimensional change allows power supplies to be placed in-line with cards rather than requiring a large horizontal backplane area, thereby reducing device height while maintaining all necessary interconnections through vertical and horizontal routing paths.
2Adaptability or versatility
If more line cards and switch cards are installed, then network functionality increases, but device complexity and space requirements increase
Solution Approach 1:
The patent divides the network device into modular segments: multiple line cards for different network functions, switch cards for packet switching, and power supplies distributed along the sides. Each card type is independently configurable and can be installed or removed without affecting others. The orthogonal connectors enable independent interconnection, allowing the system to scale functionality by simply adding or removing specific card types without increasing overall device complexity.
3Temperature
If power supplies are positioned traditionally, then power distribution is achieved, but airflow paths are blocked and cooling efficiency decreases
Solution Approach 1:
The patent introduces busbars as intermediary power distribution elements that run along the orthogonal connectors between line cards and switch cards. Instead of requiring large centralized power supply units that block airflow, the busbars distribute power through the existing card interconnection pathways. This allows power supplies to be positioned in-line with cards at the device periphery, maintaining power distribution functionality while clearing the central airflow paths for efficient cooling.
Data Source
AI summary
In some implementations, a network device includes a housing and a set of switch cards within the housing and including a first set of connectors. A set of line cards within the housing includes a second set of connectors. The set of line cards are oriented orthogonally to the set of switch cards. A first set of power supplies and a second set of power supplies are in the housing. A midplane includes a plurality of circuit board assemblies arranged within the housing between the set of line cards and the first and second sets of power supplies to allow air to flow through the set of line cards to the set of switch cards, first set of power supplies, and second set of power supplies.