Dual-Faced ATCA Midplane Direct Interconnect
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Solution Overview
Problem
The connectivity between circuit boards in ATCA systems has become a performance bottleneck due to increasing processing power and bandwidth, as conventional backplanes are limited in interconnecting front and rear transition modules directly, leading to restricted functionality and increased hardware costs in full mesh topologies.
Innovation Solution
A dual-faced midplane architecture that allows direct connectivity between front and rear circuit boards via connectors on both sides, implementing a hybrid mesh interconnection scheme to optimize data transfer and reduce hardware requirements, enabling efficient data passing and increased processing capabilities without the need for extensive switch fabric on front boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional single-sided backplane is used to interconnect circuit boards, then the structure is simple and cost-effective, but the connectivity and data transfer capability become a performance bottleneck
Solution Approach 1:
The patent transitions from a single-sided backplane to a dual-faced midplane, utilizing both the front and back surfaces for connector placement. This dimensional change allows circuit boards to be interconnected from both sides of the midplane, effectively doubling the connectivity capacity and resolving the data transfer bottleneck without requiring a completely complex new architecture
2Productivity
If a full mesh topology is implemented to improve connectivity, then data transfer efficiency increases, but hardware costs and system complexity increase
Solution Approach 1:
The patent segments the interconnection function by implementing a hybrid mesh topology where only certain critical paths require full mesh connectivity while other connections can use simplified routing. This segmentation allows the system to achieve necessary connectivity efficiency without implementing a complete full mesh topology across all circuit boards, thereby reducing hardware costs and system complexity
3Productivity
If more connectors are added to the backplane to increase connectivity, then data transfer capability improves, but the backplane becomes more complex and expensive
Solution Approach 1:
The patent utilizes the unused back surface of the midplane to place additional connectors, effectively adding interconnection capacity without increasing the complexity of the front surface design. This approach allows more circuit boards to be interconnected while maintaining a clean, manageable backplane structure on the front side
Data Source
AI summary
A system compatible for use with ATCA includes a chassis comprising a first and a second plurality of slots for receiving circuit boards. The chassis further includes a midplane having a front surface and a back surface. The midplane extends between the first plurality of slots and the second plurality of slots. The midplane has a first plurality of connectors affixed to the front surface and has a second plurality of connectors affixed to the back surface. Each connector is arranged to accept a circuit board. The midplane forms an interconnection scheme such that one of the first plurality of slots is directly connected to one of the second plurality of slots. The one of the first plurality of slots and the one of the second plurality of slots extend in opposite directions from their respective connections on the midplane.