Automated Optical Network Element Validation via Switchable Loopback
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Solution Overview
Problem
The installation and deployment of network components are challenging due to the need for post-installation testing, which can lead to damage or injury if errors are discovered after the installer has left the site, and there is a lack of knowledge among installers about the components, leading to potential damage or inefficiencies.
Innovation Solution
The integration of self-testing assemblies within Optical Network Elements (ONEs) that include switchable loopback connections and remote controller systems for automated validation, allowing for standalone testing without external fiber spools, reducing the need for manual intervention and ensuring safe and efficient installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional manual testing procedures are used after installation, then installation flexibility is maintained, but the risk of damage or injury increases and installation time is extended
Solution Approach 1:
The system performs preliminary self-validation testing automatically during the installation process before the installer leaves the site. The ONE executes built-in diagnostic routines that test optical paths, amplifier functionality, and connection integrity, ensuring issues are detected and resolved while the installer is still present, thereby preventing future damage or rework.
Solution Approach 2:
The Optical Network Element performs self-testing and self-validation without requiring external testing equipment or manual intervention. The built-in validation system autonomously checks its own functionality, optical connections, and operational parameters, reducing dependency on installer expertise and minimizing installation time while improving reliability.
2Reliability
If external fiber spools are used for testing, then comprehensive testing can be performed, but device complexity and potential points of failure increase
Solution Approach 1:
The testing functionality is extracted from external equipment and integrated directly into the Optical Network Element itself. The ONE contains built-in validation circuits, optical paths, and diagnostic capabilities that eliminate the need for external fiber spools and separate testing devices, thereby reducing complexity while maintaining testing accuracy.
Solution Approach 2:
The testing and validation functions are merged with the operational components of the Optical Network Element. The same amplifiers, optical paths, and connectors used for normal operation are utilized for self-validation, eliminating the need for separate testing infrastructure and reducing the overall system complexity while ensuring accurate testing of actual operational components.
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
Enables safe and efficient standalone testing of network components, reducing the risk of damage and injury to equipment and installers, while ensuring that components are operational before connection to external networks, thereby improving installation processes.
Implementation Method 1
The Raman amplifier may include a plurality of pumps, wherein, during a loopback test involving the loopback connection, each pump of the Raman amplifier may be turned on, one at a time, at a low power level
Implementation Method 2
the ONE may further include a laser source configured to produce Amplified Spontaneous Emission (ASE) test signals
Data Source
AI summary
Systems and methods for testing Optical Network Elements (ONEs) are provided. A process, according to one implementation, includes switching a first broadband switch of a remote ONE from a first output to a second output. The first output of the first broadband switch enables direct transmission to a line-out port configured for connection with a first fiber span of a pair of external fiber spans. The process also includes switching a second broadband switch of the remote ONE from a first input to a second input. The first input of the second broadband switch enables direct reception from a line-in port configured for connection with a second fiber span of the pair of external fiber spans. Switching the first broadband switch to the second output and switching the second broadband switch to the second input enables propagation through a loopback connection for testing the remote ONE.