SDN Proxy Correlation Index Data-Plane Control
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Solution Overview
Problem
The transfer of Key Performance Indicators (KPIs) from the data-plane and Flow Description Tables (FDTs) into the control-plane burdens Software-Defined Networks (SDNs), leading to delays in intelligent feedback control.
Innovation Solution
Distributing Proxy Correlation Index (PCI) control within the SDN data-plane, where SDN controllers configure PCI generators and flow controllers to process KPIs and update FDTs locally, reducing the need for extensive PCI transfers and improving feedback control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If KPIs are transferred from data-plane to control-plane for PCI generation, then centralized control and management is improved, but network burden increases and feedback control delay occurs
Solution Approach 1:
The patent segments the PCI generation function by deploying distributed PCI generators in data-plane machines alongside the flow controller, rather than centralizing all PCI generation in the control-plane. This segmentation allows local PCI generation at the data-plane level, reducing transfer burdens and feedback delays while maintaining centralized configurability through SDN signaling.
Solution Approach 2:
The patent introduces a new dimension to PCI generation by enabling it to occur in both control-plane and data-plane simultaneously. The distributed architecture allows PCI generators to operate locally in the data-plane while the controller retains configuration authority, creating a multi-layered control structure that resolves the time-delay contradiction.
2Manufacturing precision
If FDT updates are processed through centralized PCI generation, then control accuracy is improved, but update speed and responsiveness deteriorate
Solution Approach 1:
The patent implements preliminary action by having the flow controller continuously monitor KPIs and generate PCIs locally in real-time, rather than waiting for centralized processing. This preliminary local action enables immediate FDT updates when flow conditions change, improving update speed while the controller maintains overall control accuracy through configuration management.
Solution Approach 2:
The flow controller performs self-service by autonomously generating PCIs from monitored KPIs and updating FDTs without requiring centralized PCI generation for each flow change. This self-service capability accelerates FDT update speed while the controller ensures control accuracy through initial configuration and oversight.
3Device complexity
If PCI generation is centralized in control-plane, then system simplicity is improved, but network burden and processing load increase
Solution Approach 1:
The patent extracts the PCI generation function from the control-plane and places distributed PCI generators in data-plane machines. This extraction reduces the volume of PCI transfers between control-plane and data-plane, as PCs are generated locally where needed, thereby reducing network burden while maintaining system simplicity through standardized interfaces.
Data Source
AI summary
A Software-Defined Network (SDN) distributes Proxy Correlation Index (PCI) control in an SDN data-plane. An SDN controller transfers SDN signaling that indicates a data-plane PCI configuration. An SDN data machine processes the SDN signaling and configures a PCI generator and a flow controller to implement the data-plane PCI configuration. The SDN data-plane machine processes user data flows per a Flow Description Table (FDT) and generates Key Performance Indicators (KPIs) for the user data flows. The PCI generator generates PCIs based on the KPIs and the data-plane PCI configuration. The flow controller updates the FDT based on the PCIs and the data-plane PCI configuration. The SDN data-plane machine processes the user data flows per the updated FDT.