WSS Path Redundancy for Fault-Tolerant Optical Communication
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Solution Overview
Problem
In optical communication systems with a WDM architecture based on M×N wavelength selective switches (WSS), ensuring service transmission when core components like WSS or optical fiber connections fail is a critical challenge.
Innovation Solution
Constructing three different transmission paths using four wavelength selective switches to send optical signals carrying the same service, allowing continued transmission through a remaining path when one or two paths fail, employing a '1+1' mode for enhanced service protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If three different transmission paths are constructed using four wavelength selective switches to send optical signals carrying the same service, then service reliability is improved, but device complexity increases
Solution Approach 1:
The service transmission is segmented into three different transmission paths, each carrying the same service through distinct routes. The first path uses the first WSS and first link, the second path uses the third WSS and second link, and the third path uses the third WSS and third link. This segmentation allows the system to maintain service reliability by distributing traffic across multiple independent paths, reducing the impact of any single point of failure.
Solution Approach 2:
The system pre-configures three different transmission paths before any failure occurs. The first node is预先 configured to send optical signals through multiple WSS devices via different links to the second node. This preliminary setup ensures that when a failure occurs, the system can immediately switch to an alternative path without requiring complex real-time decision-making or reconfiguration.
2Reliability
If redundant transmission paths are added to protect against component failures, then service protection capability is improved, but system cost increases
Solution Approach 1:
The third WSS device serves multiple functions by being part of both the second transmission path (via the second link) and the third transmission path (via the third link). This multi-functionality allows the system to achieve service protection with fewer redundant components, as the third WSS is utilized across multiple paths rather than requiring separate dedicated components for each path.
Solution Approach 2:
Multiple transmission paths are merged at the second node, which receives optical signals from multiple different routes (first link, second link, third link). The second node consolidates these multiple incoming signals, allowing the system to provide service protection while reducing the need for separate end-point infrastructure at the receiving end.
Data Source
AI summary
This application provides an optical communication system and a communication method. The optical communication system includes: a first WSS, configured to transmit an optical signal with a first wavelength to a second WSS through a first link; the second WSS, configured to transmit the first optical signal with the first wavelength to a second node; a third WSS, configured to transmit an optical signal with a second wavelength to a fourth WSS through a second link; the fourth WSS, configured to transmit the optical signal with the second wavelength to the second node, where the third WSS is configured to transmit an optical signal with a third wavelength to the second WSS through a third link, and the second WSS is configured to transmit the optical signal with the third wavelength to the second node.