Optically Switched Network Scalable Arbitration
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Solution Overview
Problem
As high-performance optical networks grow in size, the central switch's circuitry becomes increasingly complex, leading to scaling challenges and thermal management issues, making it difficult to accommodate a large number of computing nodes effectively.
Innovation Solution
An optically switched network architecture with a virtual data plane and virtual control plane, utilizing an optical switch with N inputs and N outputs, and employing wavelength-division multiplexing (WDM) and distributed-arbitration logic to provide any-to-all parallel connectivity and independent arbitration among end-nodes, reducing contention and thermal issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a central switch with increasing circuitry density is used to accommodate more computing nodes, then the network capacity increases, but thermal management issues and device complexity worsen
Solution Approach 1:
The patent divides the monolithic central switch into multiple distributed optical switches, each handling a subset of computing nodes. This segmentation distributes the thermal load and circuitry density across multiple devices rather than concentrating it in a single central switch, thereby solving the thermal management problem while maintaining network capacity.
Solution Approach 2:
The patent replaces electronic switching with optical switching, substituting electronic circuitry with optical components. This substitution reduces power consumption and heat generation in the switching fabric, as optical switches do not require the same level of electronic signal processing and conversion, directly addressing the thermal management issue.
2Quantity of substance
If a central switch with increasing circuitry density is used to accommodate more computing nodes, then the network capacity increases, but device complexity worsens
Solution Approach 1:
The patent segments the central switch functionality into multiple distributed optical switches, each with simplified design requirements. Instead of one complex central switch handling all nodes, multiple simpler switches handle subsets of nodes, reducing the circuitry density and design complexity of each individual switch while maintaining overall network capacity.
3Productivity
If wavelength-division multiplexing is used to provide parallel connectivity, then communication performance improves, but the number of wavelengths required increases
Solution Approach 1:
The patent assigns specific wavelength subsets to specific subsets of computing nodes based on their communication patterns. Instead of providing all wavelengths to all nodes, each node or node subset receives only the wavelengths it needs for its specific communication requirements, reducing the total number of wavelengths required while maintaining high communication performance through localized wavelength allocation.
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 architecture allows for scalable, high-performance communication among a large number of computing nodes with reduced power consumption and lower costs, maintaining comparable performance to electronic switching while minimizing thermal problems.
Implementation Method 1
employing wavelength-division multiplexing (WDM) and distributed-arbitration logic to provide any-to-all parallel connectivity
Data Source
AI summary
An optically switched network system includes an optical switch with N inputs and N outputs that connects N end-nodes and is structured to transmit N wavelengths from each of the N inputs to each of the N outputs. The system includes a virtual data plane and a virtual control plane, which both communicate through the optical switch. The virtual data plane provides any-to-all parallel connectivity for data transmissions among the N end-nodes. The N end-nodes are partitioned into two or more subsets, wherein end-nodes in a given source subset transmit data to a given destination subset using wavelengths, which are not used by end-nodes outside of the given source subset to transmit data to the same given destination subset. The virtual control plane includes two or more rings associated with the two or more subsets of end-nodes. Each ring passes through a subset of end-nodes, and is used to communicate arbitration information among arbitration logic located at each end-node in the ring.