Orthogonal Switching Network for Cloud Scalability
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Solution Overview
Problem
Current telecommunications networks face challenges in scaling to high capacity while maintaining simplicity and performance, particularly due to the rapid growth of the Internet, which leads to increased complexity and deterioration in performance as the number of switching stages increases.
Innovation Solution
A large-scale network architecture that utilizes access nodes, primary switches, and secondary switches with orthogonal connectivity, allowing for routing of data through a distributed single-stage connector, reducing the number of switching stages and enhancing performance by using fast optical primary switches and bufferless optical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of switching stages is increased to achieve high capacity and wide coverage, then the network dimension and capacity increase, but the complexity and performance deterioration
Solution Approach 1:
The network is segmented into access nodes, primary switches, and secondary switches with distinct functions. Access nodes handle local connectivity, primary switches provide fast optical switching for most traffic, and secondary switches handle remaining traffic, dividing the complex switching function into manageable segments that scale independently
Solution Approach 2:
The patent introduces orthogonal connectivity dimensions where access nodes connect to primary switches through orthogonal port sets. This dimensional organization allows the network to scale capacity by adding switches in orthogonal dimensions rather than increasing the number of switching stages linearly, reducing complexity while maintaining growth
2Quantity of substance
If the number of switching stages is increased to achieve large-scale network dimension, then the network can support more access nodes, but the performance deteriorates
Solution Approach 1:
Traffic is segmented into two categories: most traffic (significant proportion) routes through primary switches with fast optical switching for high performance, while remaining traffic routes through secondary switches. This segmentation ensures that performance is maintained for the majority of traffic even as the network scales to support tens of thousands of access nodes
Solution Approach 2:
Primary switches act as intermediaries between access nodes and the core network, providing fast optical switching that maintains performance. The orthogonal connectivity structure allows primary switches to mediate traffic efficiently without requiring multiple sequential switching stages, preserving performance while enabling large-scale deployment
3Quantity of substance
If traditional multi-stage networks are used to achieve high capacity, then the network dimension increases, but the control complexity increases
Solution Approach 1:
Control functions are segmented and distributed to access controllers, primary controllers, and secondary controllers rather than centralized. Each controller manages its local switches and routing, simplifying control complexity while enabling the network to scale to high capacity through distributed autonomous decision-making
Data Source
AI summary
A network comprises ingress nodes, egress nodes, primary switches, and secondary switches where any pair of an ingress node and an egress node connects to orthogonal sets of primary switches and each secondary switch connects a respective set of primary switches to an orthogonal set of primary switches. Thus, each ingress node has a primary path and numerous compound paths to each egress node. The primary path traverses a respective primary switch, and each compound path traverses a first primary switch, a secondary switch, and a second primary switch. The disclosed connectivity pattern enables network scalability to accommodate hundreds of thousands of ingress-egress node pairs while permitting a significant proportion of incoming data to be routed through the primary switches avoiding the secondary switches.