Optical Tunnel Network for Data Center Latency and Power
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Solution Overview
Problem
Conventional Data Center Networks using electrical switches face limitations in transmission rate, high power consumption due to frequent Optical-Electrical and Electrical-Optical conversions, and require frequent upgrades to support increasing demands, leading to increased costs and latency.
Innovation Solution
An intelligence-defined optical tunnel network system with multiple pods, each containing optical add-drop sub-systems that use dual transmission modules operating at different frequency bands to form rings, dynamically adjusting the number of pods and sub-systems, and employing a software-defined network controller for efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional electrical switches are used for data exchanging, then the network structure is simple and easy to implement, but the transmission rate is limited and power consumption is high
Solution Approach 1:
The patent replaces conventional electrical switches with optical switches that operate entirely in the optical domain. This substitution eliminates the need for Optical-Electrical and Electrical-Optical conversions, thereby reducing power consumption while significantly increasing transmission rates. The optical switch uses optical signals directly for data transmission and routing decisions, avoiding the energy-intensive conversion processes inherent in electrical switch systems.
Solution Approach 2:
The patent changes the fundamental operating parameter of the network from electrical signals to optical signals. By operating in the optical domain with higher frequency carriers, the system achieves higher transmission rates and lower power consumption. The optical switch processes data at optical frequencies, which are inherently higher than electrical signal frequencies, enabling faster transmission without the energy overhead of repeated conversions.
2Loss of time
If conventional electronic switches perform computation to determine packet routing, then routing decisions can be made, but latency increases and cooling costs rise
Solution Approach 1:
The patent replaces the computational routing mechanism of electrical switches with an optical routing mechanism. The optical switch determines packet routing through optical signal processing rather than electronic computation. This eliminates the time-consuming computation and heat generation associated with electronic routing decisions, thereby reducing latency and cooling requirements.
Solution Approach 2:
The patent enables the optical switch to perform routing decisions directly in the optical domain without converting to electrical signals for computation. This skipping of the conversion-computation-conversion process rushes the routing decision through the optical path, significantly reducing latency and avoiding the heat generation that would require cooling.
3Adaptability or versatility
If the system structure of conventional electronic switches is formed and fixed, then the system is stable, but it is difficult to upgrade to support more racks or servers
Solution Approach 1:
The patent implements a dynamic optical network system where the optical switch can be reconfigured to support varying numbers of racks and servers. The system structure is not fixed but can be dynamically adjusted through optical path reconfiguration. This allows the network to adapt to growing demands by adding more racks or servers without requiring a complete system redesign, thereby improving scalability while managing complexity through flexible optical routing.
Solution Approach 2:
The patent segments the optical network into modular components that can be independently added or configured. The optical switch handles multiple racks and servers through segmented optical paths, allowing incremental expansion. Each rack or server group can be managed as a separate optical segment, making the overall system scalable without proportionally increasing complexity.
4Productivity
If electronic switches are replaced or upgraded to increase transmission rate, then the transmission rate improves, but the cost to establish or maintain the network increases
Solution Approach 1:
The patent replaces the entire electrical switch infrastructure with an optical switch system, achieving high transmission rates from the outset without needing repeated upgrades. This one-time substitution eliminates the cycle of replacement and upgrade costs associated with electrical switches, as the optical system inherently provides higher performance with lower operational costs.
Solution Approach 2:
The patent changes the operating parameter to optical domain, which provides higher transmission rates by default. This parameter change eliminates the need for incremental upgrades that characterize electrical switch systems. The optical switch operates at higher frequencies and speeds inherently, providing sustained high performance without the recurring maintenance and upgrade costs required to keep electrical switch systems competitive.
Data Source
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Figure 3A
AI summary
An intelligence-defined optical tunnel network system includes a plurality of pods. Any one of the pods includes a plurality of optical add-drop sub-systems (OADS), which are configured to perform data transmission, respectively, through a plurality of Top-of-Rack (ToR) switches between a corresponding plurality of servers. Any one of the OADSs includes a first transmission module and a second transmission module. The first transmission module is configured to perform data transmission at a first frequency band, and the first transmission module of any one of the OADSs connected to the first transmission module of the adjacent OADSs to form a first transmission ring. The second transmission module is configured to perform data transmission at a second frequency band differed to the first frequency band, and the second transmission module of any one of the OADSs connected to the second transmission module of the adjacent OADSs to form a second transmission ring.