SCADA Network-Aware Control Using Traffic Monitoring Feedback

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Solution Overview

Problem

SCADA systems face operational uncertainty due to the inability to easily specify or dictate network transmission quality, affecting system functionality, efficiency, security, reliability, and maintenance in geographically distributed projects.

Innovation Solution

A method where a monitoring device records data traffic parameters over a specified period and makes them available to a control device, which sets communication parameters to control technical devices, considering transmission rate, latency, and network availability, using machine learning to forecast optimal control times and prioritize data packets, and optionally encrypting data for security.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If SCADA systems operate in geographically distributed networks without specifying transmission quality parameters, then system coverage and flexibility are improved, but operational uncertainty and reliability deteriorate

Engineering Contradiction:
Improvesystem coverageVSAvoidoperational uncertainty
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies parameter changes by dynamically adjusting communication parameters (transmission rate, latency, packet size, protocol selection) based on monitored network conditions. The control device modifies these parameters in real-time to adapt to varying network quality, thereby maintaining reliable operation across geographically distributed networks without sacrificing coverage or flexibility.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent implements feedback mechanisms where network performance parameters are continuously monitored and measured, then fed back to the control device. This feedback loop enables the system to automatically adjust communication strategies based on actual network conditions, resolving the contradiction between wide coverage and operational reliability by making the system responsive to real-time network status.

Inventive Principle:
Principle #23Feedback

2Reliability

If data traffic is monitored and communication parameters are dynamically adjusted, then network transmission quality and reliability are improved, but system complexity and measurement requirements worsen

Engineering Contradiction:
Improvenetwork transmission qualityVSAvoidsystem complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces a monitoring device as an intermediary component that separates the complex tasks of network parameter measurement and analysis from the control device. This intermediary handles the sophisticated monitoring and evaluation functions, while the control device focuses on decision-making and actuation, thereby improving transmission quality without excessively increasing the complexity of the core control system.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent segments the control system into distinct functional components: a monitoring device responsible for measuring and analyzing network parameters, and a control device responsible for making decisions and executing control actions. This segmentation allows each component to specialize in specific tasks, improving overall reliability while managing system complexity through functional decomposition.

Inventive Principle:
Principle #1Segmentation

3Measurement precision

If observation periods are extended to capture sufficient network data, then measurement accuracy and forecast precision are improved, but response time and productivity worsen

Engineering Contradiction:
Improvenetwork condition assessment accuracyVSAvoidresponse time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies dynamics by making the observation period duration adaptive rather than fixed. The system dynamically adjusts the length of observation periods based on current network conditions, traffic patterns, and the specific control task requirements. This allows the system to capture sufficient data for accurate measurements when needed while minimizing observation time when rapid response is required, thereby balancing measurement precision with response time.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent implements preliminary action by performing machine learning-based forecasting of network conditions in advance. The system analyzes historical network data to predict future network states, allowing control decisions to be prepared beforehand. This preliminary forecasting reduces the need for extended real-time observation periods, improving both measurement accuracy and response time by anticipating network conditions before they fully manifest.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentEP3722899B1Method of and apparatus for controlling a technical device
Publication Date: 2022.12.07 ETM PROFESSIONAL CONTROL GMBH
  • EP3722899B1 patent drawing

AI summary

Method for controlling a technical device (10) which is connected to a control device (30) via a network (20), wherein application data (21-24) for controlling the technical device (10) and further data communication devices (11-13) is transmitted via the network (20) in the form of data traffic (25), and the data traffic (25) is recorded by a monitoring device (40) by means of at least one data traffic parameter (41) over a predetermined observation period and is made available to the control device (30), and from the at least one data traffic parameter (41) at least one communication parameter is determined by the control device (30), and the technical device (10) is controlled using the at least one communication parameter.