Citadel training on context awareness solution
- 1. Training on Context Awareness Solution ATB Training - Context Awareness 1
- 2. This material provides guidelines in form of a presentation of the Context Awareness - component of the Adaptation Plane. The Context Awareness is a component which implements a mechanism to identify the current context under which the CITADEL framework as well as an application is used/operated. To identify the current context, the Context Awareness will use run-time data provided by the Monitoring Plane as input on one hand and a pre-defined context model on the other hand. Abstract ATB Training - Context Awareness 2
- 3. Overall organization of the Context Awareness module Interactions and role in the CITADEL framework Context Awareness Architecture, key components, interactions Guidelines for the creation / adaptation of the Context Model Guideline for Installation and Configuration of Context Awareness module Usage of the Context Awareness module Integration with Monitoring plane, Adapation plane and MILS console sub system Content ATB Training - Context Awareness 3
- 4. The presented solution is to identify current dynamically changing context in which the (production) system operates and to ‘use’ this identified context as additional input for the Adaptation Plane. Motivation ATB Training - Context Awareness 4
- 5. Part in CITADEL ATB Training - Context Awareness 5
- 6. Monitoring Plane: To identify the current context the Context Awareness solution will use "run-time" data provided by the Monitoring Plane. Configuration Plane: To identify the current context the Context Awareness solution will use data provided by the Configuration Plane. Adaptation Plane: The current identified context can be used as an additional input in the Adaptation Plane for determination when a change is needed. Interfaces of Context Awareness ATB Training - Context Awareness 6
- 7. General Context - Awareness Concept ATB Inner Loop Outer Loop Context Extraction Context Monitoring Context Provision Context Modelling Context Model Critical Infrastructure Training - Context Awareness 7
- 8. Main purpose is to define the fundamental data model for context extraction The CITADEL Context Model defines layered ontologies Generic Context Model Sector-Specific Context Model The key issues to be solved are: how to refine context model to describe process/ products/ service/ network context in domain- specific knowledge-based activities. how to integrate context model into existing enterprise service infrastructure and tools. how to provide a generic solution adaptable to different scenarios. Context Model ATB Training - Context Awareness 8
- 9. ATB Context Model Training - Context Awareness 9
- 10. Some basic principles for context modelling were identified: 1. Support description of main context: In practices, we cannot model all context information, and it is also not realistic. The context model should consider those most related factors according to the requirement of context sensitive adoption. 2. Model the context that is easy acquirable: Those context factors considered should be identifiable and acquirable, whether provided through computer monitoring automatically, or by user input explicitly. 3. Trade-off between investment of context modelling/extracting and effects of context sensitive adoption: Intuitively, if we could model as much context factors in as much details, the accuracy of context will be higher. However, this does not come for free. Guidelines for Context Modelling ATB Training - Context Awareness 10
- 11. Architecture ATB Context Awareness Architecture Context Provision Context Extractor System Monitor External System Context Learner ContextModel Validator … Adaptation Plane Training - Context Awareness 11
- 12. ATB Context Monitoring Repositories Monitoring Data Repository System Monitor ContextExtractor Interface System Specific Interface Specific Monitor System Specific Interface Specific Monitor Generic Monitor Monitoring Plane e.g. proNToAdaptation Plane Training - Context Awareness 12
- 13. Monitor machine and device states in production lines Based on Generic Monitoring Service and BC-Specific System Monitors Monitor and trace device states and sensory information Gather Data/Information produced and altered Standardize Monitoring Data Comparable between different states Baseline for Context Extraction Access and use Legacy systems Monitor Device Interfaces for changing parameters/states Generalize Monitoring Services to utilize them in multiple scenarios Components of Context Monitoring ATB Training - Context Awareness 13
- 14. ATB Context Extractor Repositories Monitoring Data Repository Context Repository Model Repository Context Extractor System Monitor Interface ContextProvision Interface ContextLearner Interface ContextMonitoring (Data Processing) Context Reasoning Context Identification Training - Context Awareness 14
- 15. Context Provision Interface: Represents the interface to services that subscribed to get information from Context Extractor. System Monitor Interface: Generic component, which is responsible for accessing the from the context monitoring. Data Processing: This module is responsible for the pre-processing of monitored raw data acquired via the data access layer, before the context will be identified. Main functionality will be the normalisation of monitored data to transform the raw data in a format which serves as basis for context identification Context Identification: Main component of the Context Extractor. It is responsible for the identification of the current context, based on monitored raw data, the CITADEL context model and historic context information stored in the context repository. Context Reasoning: Responsible for providing appropriate rules for the identification of context. Context Repository: Inside this repository the identified context will be stored for further processing and reuse. Model Repository: Repository for the CITADEL ontology. This repository should eventually be shared with other parts of the system (e.g. Adapter). Components of Context Extractor ATB Training - Context Awareness 15
- 16. Context extraction process Context Identification Context Reasoning Context Repository Context Similarity Measure Monitoring Data Extracted Context ATB Training - Context Awareness 16
- 17. Realised through querying and mapping Context identification process Monitoring Data • Machine Data • Measurement Data • … Construct a Dummy Context Identify Machine Identify Process Identify Production Identify Product Identify state2efficiency Identify symptom2damage Identified Context ATB Training - Context Awareness 17
- 18. To produce more accurate and meaningful knowledge context out of the identified context. Three types of reasoning are provided: ontological reasoning, domain specific rule-based reasoning, and statistical reasoning. Context Reasoning Ontological Reasoning Domain Specific Rule Based Reasoning Statistical Reasoning Identified Cotnext Refined Context ATB Training - Context Awareness 18
- 19. Context Monitoring implement business case specific “plugins”: System Monitors: implement a monitor to ingest data into the Context Monitoring Parsers: a corresponding parser has to be implemented to be able to parse the content and prepare it for analysing ATB Business Case specific Customisation Analysers: The analyser is responsible for filling the specific monitoring data model Monitoring Data Models: implement a data model in which the monitored data will be transferred and stored in Configuration: a monitoring configuration defines bundles of classes which are responsible for the monitoring of a specified data source (in xml format) Training - Context Awareness 19
- 20. ATB Business Case specific Customisation Context Extraction implement business case specific “plugins”: IContextIdentifier: wrapper that is used to identify a situation based on monitored data and the context model ContextContainer: wrapper object that holds an identified situation during run-time Training - Context Awareness 20