Optical Network Element Signaling for Electrical Regenerator Path Loops
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Solution Overview
Problem
In optical communication networks, the placement of an electrical regenerator on an electrical network element leads to path loops in signaling and routing, limiting network capacity and efficiency due to the inability to establish effective wavelength connections.
Innovation Solution
The method involves mapping properties of an electrical regenerator's interface to an optical network element's interface using Link Management Protocol (LMP) and routing flooding, allowing the optical network element to establish local wavelength connections and inform the electrical network element to do the same, thereby creating a wavelength-switched path through the electrical regenerator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrical regenerator is placed on an electrical network element, then signal regeneration quality is improved, but path loops occur in signaling and routing
Solution Approach 1:
The patent segments the wavelength connection establishment into two independent parts: optical network element wavelength connections and electrical network element wavelength connections. By separating the signaling processes and using different interface indexing systems for optical and electrical domains, the path loop problem is avoided while maintaining signal regeneration functionality.
Solution Approach 2:
The patent introduces an intermediary mapping relationship between optical interface properties and electrical interface properties. Through LMP protocol and routing flooding, the system mediates the connection establishment process, allowing the electrical regenerator to be integrated without creating signaling loops.
2Reliability
If an electrical regenerator is placed on an electrical network element, then signal regeneration is achieved, but network management capacity is limited
Solution Approach 1:
The patent creates a universal interface property mapping mechanism that works across both optical and electrical network elements. The LMP protocol and routing flooding approach provide a multi-functional framework that handles wavelength connection establishment uniformly, regardless of whether the network element is optical or electrical, thereby expanding network management capacity.
3Measurement precision
If routing flooding is used to inform all optical network elements, then wavelength connection accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies local quality by making interface property mapping specific to each interface's characteristics. Each optical and electrical interface maintains its own property definitions and indexing, allowing precise local wavelength connections while avoiding unnecessary global signaling overhead. The routing flooding is optimized to carry only necessary mapping information.
Data Source
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AI summary
Embodiments of the present invention provide a signaling establishment method when an electrical regenerator is on an electrical network element, an optical network element, and an electrical network element. According to the method, a property of a fifth interface is mapped to a property of a third interface, and all optical network elements on an optical network on which the optical network element is located is informed, by means of routing flooding, of the property of the third interface, so that the optical network element establishes a local wavelength connection for the optical network element according to signaling; and the optical network element delivers a message, so that the electrical network element establishes a local wavelength connection for the electrical network element according to the message, thereby implementing that a wavelength switched path that passes through an electrical regenerator is established when the electrical regenerator is on the electrical network element.