nexus – augmented world models for mobile …...distributed systems (ipvs) breitwiesenstraße 20 -...

University of Stuttgart

Institute of Parallel and Distributed Systems (IPVS)

Breitwiesenstraße 20 - 22D-70565 Stuttgart

NEXUS –Augmented World Models for Mobile

Context-aware Applications

August 2002

Martin Bauer

University of Stuttgart

IPVS

Research Group

“Distributed Systems“

Motivation

Mobile multi-functional Devices

(Embedded) interactive Systems-> „Smart Things“

Wireless Networks• WAN, LAN, PAN• Infrastructure-based, Ad Hoc

Sensor Technology• Identification • Position • State, Environment

Physical World Digital World

Context-aware Systems

NavigationLocation-based Services„Sentient Computing“

„Ubiquitous Computing“MiniaturizationDecline in prices

University of Stuttgart

IPVS

Research Group

“Distributed Systems“

Vision: Federated World Models

World Models

Information Spaces

Applications

Data from

Billions ofSensors

WWWDigital

Libraries

Federation

„Smart Factory“ City GuideNavigation...

...

University of Stuttgart

IPVS

Research Group

“Distributed Systems“

Vision: Nexus-PlatformConnects Physical and Digital World

Federated World ModelsSensor Integration, ConsistencyMetaphors for Linking InformationTemporal Concepts

Supports Model InteractionSynchronous: Spatial QueriesAsynchronous: Spatial

Predicates/EventsVisualization

Supportsinfrastructure-basedinfrastructureless, hybridSystems

Applications

PhysicalWorld

World Model

InformationSpaces

Nexus

University of Stuttgart

IPVS

Research Group

“Distributed Systems“

General Architecture

Umgebungs-modelldaten-

server

Application 1 Application 2

LocationService

Event Service

World Model

Federation

Spatial ModelServer

Other Services

University of Stuttgart

IPVS

Research Group

“Distributed Systems“

(Almost) Automatically Generated Model

University of Stuttgart

IPVS

Research Group

“Distributed Systems“

Spatial Events

• Proactivity is important in mobile, location-aware computing

• Can be supported by event observation/notification mechanism

Ask forautograph...

Meeting Event Enter Area Event

ShoesYou wantedto buy shoes...

University of Stuttgart

IPVS

Research Group

“Distributed Systems“

Event Service: Research Goals

Overall goal: Investigate architectures and mechanisms for Internet-scale event management

• Distributed observation of complex eventsSpecification of distributed eventsParameters for describing semantic aspects: event consumption policy, time issues Framework for distributed observationOptimal distribution of observation

• Delivery of event notifications

observer

eventnotification

recipient

event

event

University of Stuttgart

IPVS

Research Group

“Distributed Systems“

Thank you very much for your attention!

E-mail: Martin.Bauer@informatik.uni-stuttgart.de

Project URL: http://www.nexus.uni-stuttgart.de