Optoelectronic Switch Optical Fabric Reduces Power
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Solution Overview
Problem
Current chassis switches rely on complex and expensive high-speed electrical backplanes and numerous redriver chips to manage signal transmission, leading to increased complexity, cost, and power consumption, which is inefficient for large-scale data switching.
Innovation Solution
The implementation of an optoelectronic switch that uses an optical fabric for interconnecting leaf and spine switches, eliminating the need for redriver chips and complex electrical backplanes by routing data directly through fibers, thereby reducing power consumption and manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-speed electrical backplanes and redriver chips are used to transmit signals, then signal transmission can be achieved, but device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent extracts and removes the complex electrical backplane and redriver chip infrastructure from the switch architecture. By using optical interconnects directly between switch ASICs, the invention eliminates the intermediate electrical signal conditioning layers, thereby reducing device complexity while maintaining signal transmission reliability.
Solution Approach 2:
The patent substitutes electrical signal transmission with optical signal transmission. By replacing electrical backplanes and copper traces with optical fibers or waveguides, the invention eliminates the need for redriver chips and complex electrical infrastructure, reducing both device complexity and power consumption while improving signal integrity.
2Length of stationary object
If multiple redriver chips are deployed to extend signal reach, then transmission distance increases, but power consumption increases
Solution Approach 1:
The patent replaces electrical signal transmission with optical signal transmission to extend transmission distance without proportionally increasing power consumption. Optical signals can travel longer distances through fibers or waveguides with minimal attenuation, eliminating the need for multiple redriver chips and their associated power consumption.
Solution Approach 2:
The patent changes the transmission medium from electrical to optical, fundamentally altering the transmission parameters. Optical transmission enables longer distances with lower power consumption due to lower signal attenuation and the ability to use amplification or regeneration only when necessary, rather than requiring redriver chips at regular intervals.
3Adaptability or versatility
If electrical IOs in switch ASICs are used, then switching functionality is achieved, but link power budget requirements cannot be met over certain distances
Solution Approach 1:
The patent substitutes electrical I/O with optical I/O in the switch ASICs. This substitution enables the switching functionality to be maintained while dramatically extending the transmission distance capability, as optical signals can traverse much longer distances through optical fibers or waveguides compared to electrical signals through copper traces.
Solution Approach 2:
The patent makes the switch ASICs multi-functional by integrating both switching logic and optical I/O capabilities. This universal design allows the same ASIC to perform packet switching while simultaneously handling long-distance optical transmission, eliminating the need for separate electrical I/O interfaces and redriver chips.
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
This solution enables higher data rates over longer distances with lower power loss, reducing the need for complex electrical infrastructure and lowering operational costs in data centers.
Implementation Method 1
an optical fabric providing connections between the fabric-facing optical ports of the fabric-side transceivers and the fabric-facing optical ports of the spine switches
Data Source
AI summary
An optoelectronic switch for switching data from a source external client device to a destination external client device, the optoelectronic switch includes: an array of client-side transceivers, each having an array of client-facing optical ports to connect to an external client device, and an array of leaf-facing electrical ports; an array of leaf switches, each including an array of client-side electrical ports and an array of fabric-side electrical ports; a first electrical interconnecting region providing electrical connections between the leaf-facing electrical ports of the client-side transceivers and the client-side electrical ports of the leaf switches, an array of fabric-side transceivers, each having an array of leaf-facing electrical ports, and an array of fabric-facing optical ports; a second electrical interconnecting region providing electrical connections between the fabric-side electrical ports of the leaf switches and the leaf-facing electrical ports of the fabric-side transceivers; an array of spine switches, each including an array of fabric-facing optical ports; and an optical fabric providing connections between the fabric-facing optical ports of the fabric-side transceivers and the fabric-facing optical ports of the spine switches.