Optical Transceiver Elastic Bandwidth Resiliency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional optical transceivers face challenges with high-speed data transmission due to mismatched electrical and optical lane speeds, channel impairments, and reliability issues in harsh environments, particularly in optical backplanes, where mechanical alignment, dust, and laser component reliability affect optical link reliability.
Innovation Solution
The implementation of optical transceivers with multiple optical sub-lanes that split and combine data signals to match higher-speed electrical lanes, using vertical-cavity surface-emitting lasers and photodiode arrays, allowing for elastic bandwidth and resiliency through lane switching and load balancing, enabling dynamic adaptation of bandwidth and fault tolerance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional single optical lane is used for high-speed data transmission, then bandwidth is sufficient, but reliability deteriorates due to channel impairments and component failures in harsh environments
Solution Approach 1:
The patent divides a single optical lane into multiple lower-speed optical sub-lanes (e.g., two 25 Gbps sub-lanes from one 50 Gbps lane). This segmentation allows the system to maintain aggregate bandwidth while improving reliability through redundancy and fault tolerance, as data can be transmitted across multiple sub-lanes and recovered even if some sub-lanes fail.
Solution Approach 2:
The system pre-configures multiple optical sub-lanes and establishes error correction and fault detection mechanisms before transmission begins. This allows the system to withstand channel impairments, dust, and component failures that occur in harsh environments like optical backplanes, maintaining reliable operation despite adverse conditions.
2Reliability
If multiple optical sub-lanes are used to improve reliability, then fault tolerance increases, but device complexity increases due to lane switching and load balancing requirements
Solution Approach 1:
The patent introduces lane switch circuits as intermediary components that manage the mapping between electrical lanes and optical sub-lanes. These intermediaries handle the complexity of lane switching, load balancing, and fault recovery, shielding the higher-level system from the intricacies of multi-sub-lane management while enabling reliable operation.
Solution Approach 2:
The optical transceiver system implements self-diagnosis and automatic fault recovery mechanisms where the system monitors its own sub-lane health and dynamically reallocates traffic to functional sub-lanes without external intervention. This self-service approach manages the complexity of multiple sub-lanes autonomously, improving reliability while minimizing the need for complex external control systems.
3Productivity
If electrical lane speed is reduced to match optical lane speed, then component requirements are simplified, but productivity decreases due to bandwidth limitations
Solution Approach 1:
The patent implements dynamic bandwidth adaptation where the system can flexibly adjust the number of active optical sub-lanes and their data rates based on traffic demands and component availability. This allows the system to scale bandwidth dynamically - using more sub-lanes when high speed is needed and consolidating to fewer sub-lanes when reliability is the priority or components are degraded, providing both high productivity and adaptability.
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 provides reliable and adaptable optical links with improved resiliency and power efficiency by dynamically managing bandwidth across multiple optical sub-lanes, ensuring consistent data transfer even with impaired sub-lanes, and extending the lifespan of optical components.
Implementation Method 1
using vertical-cavity surface-emitting lasers
Implementation Method 2
and photodiode arrays
Data Source
AI summary
Example methods and apparatus to implement an electrical/optical transceiver to facilitate data transfer are disclosed. An example apparatus includes an electrical transceiver lane to transfer data at a first bandwidth over an electrical link. The example apparatus also includes a plurality of optical transceiver sub-lanes to transfer data over an optical link. The example apparatus also includes a lane switch to dynamically map the electrical transceiver lane to the plurality of optical transceiver sub-lanes based on an analysis of the first bandwidth and the plurality of optical transceiver sub-lanes to accommodate the first bandwidth with at least a subset of the plurality of optical transceiver sub-lanes to transfer data between the electrical link and the optical link.