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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
AgentGroup
Agent and Pervasive Computing GroupDipartimento di Ingegneria dell’InformazioneUniversità degli Studi di Modena e Reggio Emilia
www.agentgroup.unimo.it
04/06/2007 AgentGroup 2
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Group members
Modena– Letizia Leonardi, full professor– Giacomo Cabri, associate professor– Raffaele Quitadamo, PhD student– Francesco De Mola, PhD student– Mariachiara Puviani, PhD student– Luca Ferrari, collaborator
Reggio Emilia– Franco Zambonelli, associate professor– Marco Mamei, research associate– Luca Cernuzzi, collaborator
04/06/2007 AgentGroup 3
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Research activities
Background– Distributed systems– Object-oriented programming
Well-established– (Mobile) Software agents– Pervasive computing
Current– Services– Autonomic computing
04/06/2007 AgentGroup 4
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Software agents
Support and infrastructures Interaction engineering
– Coordination (context-aware) – Roles
Ambient intelligence E-health
04/06/2007 AgentGroup 5
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Agent interactions
Agent sociality implies the modelling and implementation of interactions in agent systems
Coordination Role-based agent interaction
04/06/2007 AgentGroup 6
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Coordination
Agent sociality implies interactions and synchronization– With other agents– With execution environment
Different models Coupling
– spatial– temporal
04/06/2007 AgentGroup 7
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Taxonomy of the coordination models
Spatial
Temporalcoupled
uncoupled
coupled
uncoupled
Direct Blackboard-based
Meeting-oriented Linda-like
Aglets Ambit
MOLE JavaSpaces
04/06/2007 AgentGroup 8
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Direct coordination
The involved entities communicate directly
Typical of the client-server and peer-to-peer models
Internet
sendTo(Minnie, “I love you”)
04/06/2007 AgentGroup 9
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Linda-like coordination
Interactions via a third entity Blackboard + pattern-matching
– information obtained via partial knowledge
Tuple spaces Tuple: ordered set of typed fields Operations: Read, Out, In
04/06/2007 AgentGroup 10
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
MARS
Mobile Agent Reactive Space 100% pure Java portability Can be associated to different mobile
agent system (Aglets, Java2go, SOMA)
04/06/2007 AgentGroup 11
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
MARS at work
Tuple space
Agent server
Internet
Working...
take((2, null)) (2, “c”)
(2, “c”) (2, “u”) (7, “a”)
04/06/2007 AgentGroup 12
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Adding reactivity
The tuple space reacts to the agent accesses
The behavior of the tuple space can be customized
04/06/2007 AgentGroup 13
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Programmable reactivity
The tuple-space reactions can be programmed
More flexibility Separation between algorithmic and e coordination issues
Implementation of policies of– application (agent interactions)– local environment (interactions with the
environment)
04/06/2007 AgentGroup 14
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Università Università di di
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MARS – reactive model (1)
Reactions realized as meta-tuple Meta-space
– Writing a meta-tupla installing a reaction– Deleting a meta-tupla uninstalling a
reaction
Example of meta-tupla:(TransformTake_Obj, null, “take”, “reader”)
04/06/2007 AgentGroup 15
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
MARS – reactive model (2)
Tuple space
Agent server
Meta-Spazio di tuplereaction
take((2, null)) (2, “c”)
(2, “c”)
read((2, null))
(2, “u”) (7, “a”)
04/06/2007 AgentGroup 16
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Role-based agent interactions
Role– Stereotype of behavior– Abstraction to model interactions
Already exploited in OOP [Baumer et al., 1997; Fowler, 1997, Steimann 2003]
04/06/2007 AgentGroup 17
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
State of the art
analysis design
implementation
Zhu’s approach
Yu and Schmid
TRUCE
TRANS
ROPE
RoleEPKendall’sapproach
GAIA
Fasli’sapproach
BRAIN
AALAADIN
RICA-J
AmI approach
Different approaches analyzed from the development phases’ point of view
04/06/2007 AgentGroup 18
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
AgentINteractions
The BRAIN Framework
XML-based notation
Role-based interaction model
BRAIN framework
Interaction infrastructure
(implementation A)
Interaction infrastructure
(implementation B)
…
B. R. A. IN.BehaviouralRole
04/06/2007 AgentGroup 19
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
The BRAIN Framework
XML-based notation
Role-based interaction model
BRAIN framework
Interaction infrastructure
(implementation A)
Interaction infrastructure
(implementation B)
…
Interaction model based on action-event roles as: set of capabilities expected behaviors
XML-based notation
Role-based interaction model
BRAIN framework
Interaction infrastructure
(implementation A)
Interaction infrastructure
(implementation B)
…
ActionsActions
EventsEvents
04/06/2007 AgentGroup 20
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
XML-based notation
Role-based interaction model
BRAIN framework
Interaction infrastructure
(implementation A)
Interaction infrastructure
(implementation B)
…
XML-based notation
Role-based interaction model
BRAIN framework
Interaction infrastructure
(implementation A)
Interaction infrastructure
(implementation B)
…
The BRAIN Framework
XML notation:Understandable by programmers and (someway) by programmersInteroperabilityDifferent views based on XSL
04/06/2007 AgentGroup 21
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
XML-based notation
Role-based interaction model
BRAIN framework
Interaction infrastructure
(implementation A)
Interaction infrastructure
(implementation B)
… interaction infrastructure(s): implements the BRAIN model provides the action-event support enables agents to dynamically assume/use/release roles manages roles and related facilities
The BRAIN Framework
XML-based notation
Role-based interaction model
BRAIN framework
Interaction infrastructure
(implementation A)
Interaction infrastructure
(implementation B)
…
Role systems
04/06/2007 AgentGroup 22
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
The GAIA methodology
Methodology to develop MAS Analysis and design Exploits also roles
04/06/2007 AgentGroup 23
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Università Università di di
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E-Health
Issues:– Centralized architectures– Closed and isolated solutions– Mobile and dynamic scenarios– Patients’ information
Agents in Health Care:– Flexible management– Integration– Home assistance– Emergency management
04/06/2007 AgentGroup 24
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Università Università di di
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UbiMedic Framework Territorial emergencies: distribution, dynamism, mobility,
unpredictability, heterogeneity Mission-critical domain: reliability, flexibility, context-awareness,
reactivity, real-time
Core Services
Context Management
EnvironmentFactory
SessionFactory
Authen-tication
Authori-zation
Discovery
EnvironmentMonitoring
Profiles
Policies
Event Manager
Request Manager
UBIMEDIC FRAMEWORK
JADE-LEAP
Java Virtual Machine
Operating System
ApplicationServices
ResourceExplorer
Chat AgendaMedicalDevice
UbiMedic features– Agent-based framework, built on JADE-LEAP– Agent implementation of centralized management facilities and distributed
services: permission administration, discovery, …– Context-awareness: event management and notification– Data acquisition and integration of remote medical devices by means of
mobile agents
04/06/2007 AgentGroup 25
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Other activities
Ubiquitous computing Autonomic computing Services Code mobility
04/06/2007 AgentGroup 26
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Università Università di di
Modena e Modena e Reggio Reggio EmiliaEmilia
Web site
http://www.agentgroup.unimore.it
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