Low-Latency Packet Switch Architecture With Perfect-Shuffle Routing
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Solution Overview
Problem
Existing telecommunication networks face challenges in efficiently and reliably transmitting data due to high latency and contention in switch architectures, which are exacerbated by increasing data rates and bandwidth demands, leading to packet dropping and retransmission requirements.
Innovation Solution
A low latency switch architecture utilizing a hybrid of Banyan and crossbar interconnects with spatial division multiplexing, employing multiple layers of sub-switches connected by perfect-shuffle mesh interconnects, and random distribution of data packets to reduce contention and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If shared switch resources are used in data communication networks, then device complexity is reduced and ease of operation is improved, but latency increases and productivity decreases during heavy network usage
Solution Approach 1:
The switch architecture is divided into multiple independent sub-switches (e.g., 4×4 sub-switches) that operate in parallel. Each sub-switch handles specific traffic flows independently, eliminating the single-point contention bottleneck of shared resources. This segmentation allows simultaneous packet routing through multiple paths, reducing latency while distributing computational complexity across several simpler units.
Solution Approach 2:
The patent introduces spatial dimensionality by arranging sub-switches in a multi-layer mesh topology (e.g., three layers of sub-switches with perfect-shuffle interconnects). Traffic can traverse through different spatial layers and paths, adding dimensional freedom to routing. This transforms the traditional single-plane switching into a multi-dimensional routing space, providing alternative paths around congestion points and reducing latency without requiring a monolithic complex switch.
2Productivity
If multiple layers of sub-switches with perfect-shuffle mesh interconnects are employed, then latency is reduced and packet routing efficiency is improved, but device complexity and resource requirements increase
Solution Approach 1:
The complex routing function is segmented across multiple independent sub-switches, each handling a portion of the total traffic. The perfect-shuffle mesh interconnect distributes packets systematically across these segments. This segmentation transforms one complex routing decision into multiple simpler, distributed decisions, improving overall routing efficiency while managing complexity through modularity.
Solution Approach 2:
The perfect-shuffle mesh interconnect pre-establishes systematic routing paths between sub-switches before traffic arrives. Packets are distributed across the mesh in a predetermined pattern that balances load and avoids congestion. This preliminary structuring of communication paths enables efficient parallel processing of packets without requiring complex real-time routing decisions at each sub-switch, improving productivity while controlling complexity.
3Loss of time
If independent paths are provided through multiple sub-switches, then contention is reduced and latency is minimized, but the quantity of components and power consumption increase
Solution Approach 1:
Instead of one large complex switch, the system uses multiple smaller sub-switches (e.g., four 4×4 sub-switches) that collectively provide the same or greater routing capacity. Each sub-switch is a simpler, smaller component. The total number of components increases, but each individual component is less complex and consumes less power, allowing parallel operation that reduces latency through independent path processing.
Solution Approach 2:
Multiple sub-switches are merged into a unified switching fabric through the perfect-shuffle mesh interconnect. While physically separate, they function as an integrated system providing combined routing capacity. This merging approach achieves the latency benefits of independent paths while organizing components efficiently, with the interconnect sharing resources across all sub-switches to mitigate the total component count and power consumption.
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
The proposed architecture achieves low latency and efficient data routing with almost linear scaling, maintaining high first-pass success rates and reducing the need for costly and power-hungry central microchip resources.
Implementation Method 1
a photodetector disposed within the casing to receive optical signals exiting laterally from an optical fiber disposed parallel to the photodetector
Data Source
AI summary
The ability to efficiently and reliably transmit, route and receive data across telecommunication networks is essential for existing and evolving applications where connectivity to these networks is a ubiquitous aspect of society today. However, limitations in existing telecommunication networks impact this through performance, cost, and speed. To address this the inventor has established improvements with respect to routing (switching), processing, and monitoring. For routing low latency switch architectures for improving packet-based data switching are described. For processing digital optical logic devices and digital optical processing structures for enhanced functionality and processing within optical telecommunication networks are described. For monitoring improved optical connectors which provide embedded monitoring and analytical functionality for improved management of optical telecommunication networks are described.