Gateway Node Hybrid Network Delay Measurement
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Solution Overview
Problem
Current communication networks face challenges in accurately measuring end-to-end delay across hybrid environments that combine packet networks and Optical Transport Networks (OTNs), as existing methods require complex network management and special knowledge at endpoint devices.
Innovation Solution
A gateway node at the boundary of these domains initiates and coordinates end-to-end delay measurements by performing 'stitching' operations, adjusting timestamps, and using delay measurement bits in OTN frames to transparently account for delays in both packet and OTN domains, enabling seamless end-to-end delay computation without burdening external management systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing delay measurement methods are used in hybrid networks, then measurement can be performed, but complex network management and special endpoint capabilities are required
Solution Approach 1:
The gateway node acts as an intermediary between the packet network and OTN domain. It receives delay measurement requests from the packet network, translates them into OTN-compatible measurement requests, and coordinates the measurement process across both domains. This intermediary approach eliminates the need for complex external network management while maintaining measurement accuracy, as the gateway node handles all cross-domain coordination internally.
Solution Approach 2:
The gateway node performs self-service by autonomously managing the entire delay measurement process across hybrid domains. It independently translates measurement requests, coordinates with remote endpoints, and computes results without requiring special capabilities at external endpoints or complex external management. This self-service capability simplifies network management while preserving measurement precision.
2Measurement precision
If existing delay measurement methods are used in hybrid networks, then measurement can be performed, but special endpoint capabilities are required
Solution Approach 1:
The gateway node serves as an intermediary that shields endpoint devices from measurement complexity. Instead of requiring endpoints to understand hybrid network protocols or perform complex measurements, the gateway node handles all translation and coordination, receiving simple requests from packet network endpoints and managing OTN domain interactions independently.
Solution Approach 2:
The gateway node performs self-service by autonomously executing the measurement process across domains. It independently translates requests, coordinates with remote endpoints, and computes results without requiring special capabilities at external endpoints. This approach maintains measurement accuracy while keeping endpoint devices simple and easy to operate.
3Measurement precision
If gateway node performs stitching operations and timestamp adjustments, then transparent delay measurement is achieved, but gateway node processing complexity increases
Solution Approach 1:
The gateway node is designed with multi-functionality to handle diverse measurement scenarios across packet and OTN domains. It performs multiple functions including request translation, timestamp adjustment, delay computation, and protocol adaptation within a single integrated architecture. This universal design consolidates processing complexity into one specialized node rather than distributing it across multiple devices, achieving transparent measurement while managing complexity centrally.
4Quantity of substance
If hybrid network paths are used, then capacity requirements are met, but accurate delay measurement becomes difficult
Solution Approach 1:
The gateway node acts as an intermediary that enables accurate delay measurement in hybrid networks by translating measurement requests across different network domains. It receives requests from the packet network, converts them to OTN-compatible formats, coordinates measurements across both packet and optical paths, and computes unified delay results. This intermediary approach maintains measurement accuracy despite the complexity of hybrid network paths carrying high-capacity traffic.
Data Source
AI summary
A method is performed by a gateway node that is at a boundary of the first network domain and the second network domain. The method includes receiving an end-to-end delay measurement request sent by the first node to measure end-to-end delay between the first node and the second node. The end-to-end delay measurement request is configured to initiate a first delay measurement process configured for use in the first network domain. The gateway node sends to the second node a delay measurement request configured to initiate a second delay measurement process configured for use in the second network domain. The gateway node determines a delay measurement in the second network domain between the gateway node and the second node using the second delay measurement process. The gateway node sends to the first node an end-to-end delay measurement response that enables the first node to compute the end-to-end delay.