OSC Data Exposure for IP Routing Stability
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Solution Overview
Problem
Current optical networks face challenges in efficiently managing and routing IP traffic due to transient optical network conditions, such as signal attenuation and amplifier spontaneous emissions, which can lead to unnecessary rerouting and service disruptions.
Innovation Solution
The solution involves exposing Optical Supervisory Channel (OSC) data from the optical transport layer to the client routing layer, allowing network devices to modify routing operations based on real-time optical link characteristics, thereby avoiding unnecessary rerouting and optimizing service delivery by incorporating additional optical layer operating characteristics into IP network routing decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If routing decisions are made without optical layer information, then routing simplicity is maintained, but unnecessary rerouting occurs due to transient optical conditions
Solution Approach 1:
The patent implements feedback by exposing Optical Supervisory Channel (OSC) data to the client routing layer, allowing routing decisions to be based on real-time optical link characteristics. This feedback mechanism enables the routing layer to detect transient optical conditions and adjust routing accordingly, preventing unnecessary rerouting while maintaining routing stability.
Solution Approach 2:
The patent adds a new dimension to routing decisions by incorporating optical layer information (OSC data) into the routing layer. This cross-layer approach allows routing decisions to consider optical link characteristics such as signal attenuation and amplifier spontaneous emissions, enabling more informed routing choices without significantly increasing complexity.
2Productivity
If optical supervisory channel data is exposed to the routing layer, then routing decisions improve, but information processing complexity increases
Solution Approach 1:
The patent extracts only the necessary optical layer information from the OSC data and exposes it to the client routing layer. By selectively extracting relevant characteristics rather than processing all OSC data, the system improves service delivery efficiency while minimizing the increase in information processing complexity.
3Reliability
If routing is based on optical link characteristics, then service delivery improves, but routing configuration complexity increases
Solution Approach 1:
The patent implements self-service by enabling the routing layer to automatically adjust routing decisions based on exposed OSC data. The system autonomously responds to optical link characteristics without requiring manual configuration changes, thereby improving service delivery reliability while maintaining ease of operation through automated adaptation.
Data Source
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AI summary
In some examples, a network device comprises one or more processors operably coupled to a memory, and a routing unit configured for execution by the one or more processors to route data traffic on a layer 3 network overlaying an optical transport system; receive optical supervisory channel data for an optical supervisory channel of the optical transport system; determine the optical supervisory channel data indicates an event affecting transmission or detection of a signal transported by a wavelength, the wavelength traversing an optical fiber of the optical transport system and underlying a link of the layer 3 network; and reconfigure, in response to determining the optical supervisory channel data indicates the event, a configuration of the network device to modify routing operations of the network device with respect to the data traffic on the layer 3 network.