Optical Protection Device for ROADM Redundancy
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Solution Overview
Problem
Traditional 1+1 optical fiber line automatic switching protection methods in optical networks are inefficient as they require backup fibers for each link, which are not always available, and only protect fiber links, not the ROADM devices within communication stations.
Innovation Solution
A communication station with two ROADM devices and optical protection devices connected to both, allowing communication in two different directions, and enabling the optical protection device to switch communication paths if abnormalities are detected, thereby protecting both the fiber links and ROADM devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 1+1 optical fiber line automatic switching protection is adopted, then fiber link protection is achieved, but backup optical fibers are required for each link which are not always available and ROADM devices are not protected
Solution Approach 1:
The patent transitions from traditional bidirectional linear protection to four-directional protection by adding vertical dimension paths. The optical protection device establishes not only horizontal paths (first direction through first ROADM, second direction through second ROADM) but also vertical dimension paths (third direction through first ROADM, fourth direction through second ROADM), creating multi-dimensional redundant routing that protects both fiber links and ROADM devices without requiring backup fibers for every link
Solution Approach 2:
The optical protection device is designed to perform multiple functions: it protects optical fiber links, protects ROADM devices from failures, enables service restoration through multiple directions, and provides both active and standby protection paths. This multi-functional design achieves comprehensive protection without requiring separate dedicated backup systems for each component
2Reliability
If traditional 1+1 optical fiber line protection is used, then simple implementation is achieved, but protection scope is limited to fiber links only and cannot protect communication station apparatus
Solution Approach 1:
The optical protection device segments protection functions into distinct directional paths (first, second, third, and fourth directions) with dedicated ROADMs for each path. This segmentation allows independent protection of fiber links and ROADM devices, enabling comprehensive coverage while maintaining manageable complexity through modular functional division
Solution Approach 2:
The optical protection device acts as an intermediary that coordinates between multiple ROADMs and transmission paths. It mediates the switching and routing decisions across four different directions, protecting both fiber links and ROADM devices by providing a centralized control mechanism that manages the complexity of multi-path protection
Data Source
AI summary
Provided are a communication station, an optical communication system, a data transmission method, and a storage medium. The communication station is a first station including: a first reconfigurable optical add-drop multiplexing ROADM device, including a first port used to connect a cable in a first direction of a network; a second ROADM device connected to the first ROADM device and including a second port which may be used to connect a cable in a second direction of the network being different from the first direction; an optical protection device connected to each of the first and second ROADM devices and used to control the first station to transmit communication with a second station for a corresponding service in the first direction corresponding to the first ROADM device, or to transmit communication with the second station for a corresponding service in the second direction corresponding to the second ROADM device.