Low-Latency Packet Switch Architecture for Contention Reduction
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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 is developed using 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 minimize contention and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional switch architectures are used to handle increasing data rates, then bandwidth capacity is improved, but latency and packet contention increase
Solution Approach 1:
The switch architecture is divided into multiple layers of sub-switches (first layer, second layer, third layer) that process data packets in stages. Each sub-switch handles a portion of the traffic, allowing parallel processing and reducing the time packets spend in the switch while maintaining high bandwidth capacity.
Solution Approach 2:
The patent introduces a multi-dimensional switching fabric with three distinct layers of sub-switches connected via mesh interconnects. This spatial decomposition transforms the traditional single-plane switch into a multi-layered architecture, enabling packets to be routed through different spatial paths and reducing contention-induced latency.
2Productivity
If switch size is increased to handle more traffic, then bandwidth capacity is improved, but resource usage and complexity increase
Solution Approach 1:
Instead of using a single large monolithic switch, the architecture segments the switching function across multiple smaller sub-switches organized in layers. Each sub-switch has reduced complexity, but collectively they handle large traffic volumes through coordinated operation via mesh interconnects.
Solution Approach 2:
The multi-layer sub-switch architecture enables dynamic load distribution across different switching paths. Traffic can be routed through various combinations of sub-switches based on current network conditions, allowing the system to scale traffic handling capacity without linearly increasing the complexity of individual switching components.
3Loss of time
If more sub-switches are added to reduce latency, then packet routing efficiency is improved, but resource usage increases
Solution Approach 1:
Multiple sub-switches are merged into a coordinated multi-layer system where the first layer, second layer, and third layer of sub-switches work together as an integrated switching fabric. This merging allows the system to achieve low latency through parallel processing while sharing resources across the layered architecture, reducing the total number of individual switching components needed compared to a single-plane design.
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 architecture achieves nearly linear scalability with significantly reduced latency and resource usage, maintaining high data packet routing efficiency and minimizing packet drops even at high data rates.
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.