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.

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
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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
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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
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5. Part in CITADEL
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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
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7. General Context - Awareness Concept
ATB
Inner Loop
Outer Loop
Context
Extraction
Context
Monitoring
Context
Provision
Context
Modelling
Context
Model
Critical
Infrastructure
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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
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9. ATB
Context Model
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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
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11. Architecture
ATB
Context Awareness Architecture
Context
Provision
Context
Extractor
System
Monitor
External System
Context
Learner
ContextModel
Validator
…
Adaptation
Plane
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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
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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
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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
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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
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16. Context extraction process
Context
Identification
Context
Reasoning
Context
Repository
Context Similarity
Measure
Monitoring Data Extracted Context
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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
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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
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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
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