Optical Ring Switching Topology for Data Center Latency Reduction
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Solution Overview
Problem
Conventional data center networks experience high latency and latency skew due to hierarchical architectures, leading to complex and costly fiber cabling requirements as the network expands, which hinders efficient data communication and scalability.
Innovation Solution
Implementing optical nodes with hybrid spatial division multiplexing (SDM)/wavelength division multiplexing (WDM) shifting channel plans in various physical topologies, such as rings and toruses, to reduce latency and link utilization, and using multicast/broadcast capable circuit switches to dynamically adjust network capacity based on traffic and requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hierarchical network architecture is used, then network management and scalability are improved, but latency and latency skew increase
Solution Approach 1:
The patent segments the network into multiple equal-cost paths between source and destination nodes, allowing traffic to be distributed across parallel hierarchical levels rather than forcing sequential traversal through all layers. This segmentation reduces the effective path length and number of hops while maintaining hierarchical organization.
Solution Approach 2:
The patent introduces a new dimensional approach by creating redundant interconnection paths that bypass traditional vertical hierarchical traversal. Optical circuit switches establish direct lateral connections between network nodes, adding a new dimension to the traditional three-layer hierarchy and enabling parallel data flow paths.
2Device complexity
If hierarchical network architecture is used, then network organization is improved, but fiber cabling complexity increases
Solution Approach 1:
The patent makes optical circuit switches universal nodes that can perform multiple functions: traditional routing, wavelength conversion, and direct optical path establishment. These multi-functional nodes replace multiple specialized devices and simplify the overall cabling architecture by consolidating functions into single versatile components.
Solution Approach 2:
The patent replaces mechanical/electrical switching systems with optical circuit switching. By using optical switches that operate directly in the optical domain without electrical conversion, the system eliminates complex electrical cabling and signaling infrastructure, reducing fiber cabling complexity while maintaining network organization.
3Quantity of substance
If network size increases, then network capacity is improved, but latency and latency skew are exacerbated
Solution Approach 1:
The patent changes the fundamental parameter of signal transmission by using optical wavelengths instead of electrical signals. This parameter change enables simultaneous transmission across multiple parallel paths with identical timing characteristics, maintaining consistent latency regardless of network size expansion. The optical domain allows for precise timing control and synchronization across expanded network capacities.
Data Source
AI summary
Data center network architectures, systems, and methods that can reduce the cost and complexity of data center networks. Such data center network architectures, systems, and methods employ physical optical ring network and multi-dimensional network topologies and optical nodes to efficiently allocate bandwidth within the data center networks, while reducing the physical interconnectivity requirements of the data center networks. The respective optical nodes can be configured to provide various switching topologies, including, but not limited to, chordal ring switching topologies and multi-dimensional chordal ring switching topologies.