440 research outputs found
Ontology-Based Context-Aware Service Discovery for Pervasive Environments
Existing service discovery protocols use a service matching process in order to offer services of interest to the clients. Potentially, the context information of the services and client can be used to improve the quality of service matching. To make use of context information in service matching, service discovery needs to address certain challenges. Firstly, it is required that the context information should have unambiguous representation. Secondly, the mobile devices should be able to disseminate context information seamlessly in the fixed network. And thirdly, dynamic nature of the context information should be taken into account. The proposed Context Aware Service Discovery (CASD) architecture deals with these challenges by means of an ontological representation and processing of context information, a concept of nomadic mobile context source and a mechanism of persistent service discovery respectively. This paper discusses proposed CASD architecture, its implementation and suggests further enhancements
A personal distributed environment for future mobile systems
A Personal Distributed Environment (PDE) embraces a user-centric view of communications that take place against a backdrop of multiple user devices, each with its distinct capabilities, in physically separate locations. This paper provides an overview of a Personal Distributed Environment and some of the research issues related to the implementation of the PDE concept that are being considered in the current Mobile VCE work programme
Mobihealth: mobile health services based on body area networks
In this chapter we describe the concept of MobiHealth and the approach developed during the MobiHealth project (MobiHealth, 2002). The concept was to bring together the technologies of Body Area Networks (BANs), wireless broadband communications and wearable medical devices to provide mobile healthcare services for patients and health professionals. These technologies enable remote patient care services such as management of chronic conditions and detection of health emergencies. Because the patient is free to move anywhere whilst wearing the MobiHealth BAN, patient mobility is maximised. The vision is that patients can enjoy enhanced freedom and quality of life through avoidance or reduction of hospital stays. For the health services it means that pressure on overstretched hospital services can be alleviated
The Role of Web Services at Home
The increase in computational power and the networking abilities of home appliances are revolutionizing the way we interact with our homes. This trend is growing stronger and opening a number of technological challenges. From the point of view of distributed systems, there is a need to design architectures for enhancing the comfort and safety of the home, which deal with issues of heterogeneity, scalability and openness. By considering the evolution of domotic research and projects, we advocate a role for web services in the domestic network, and propose an infrastructure based on web services. As a case study, we present an implementation for monitoring the health of an elder adult using multiple sensors and clients
Mobile Health Care over 3G Networks: the MobiHealth Pilot System and Service
Health care is one of the most prominent areas for the application of wireless technologies. New services and applications are today under research and development targeting different areas of health care, from high risk and chronic patientsâ remote monitoring to mobility tools for the medical personnel. In this direction the MobiHealth project developed and trailed a system and a service that is using UMTS for the continuous monitoring and transmission of vital signals, like Pulse Oximeter sensor , temperature, Marker, Respiratory band, motion/activity detector etc., to the hospital. The system, based on the concept of the Body Area Network, is highly customisable, allowing sensors to be seamlessly connected and transmit the monitored vital signal measurements. The system and service was trialed in 4 European countries and it is presently under market validation
A Systematic Process for Implementing Gateways for Test Tools
Test automation is facing a new challenge because tools, as well as having to provide conventional test functionalities, must be capable to interact with ever more heterogeneous complex systems under test (SUT). The number of existing software interfaces to access these systems is also a growing number. The problem cannot be analyzed only from a technical or engineering perspective; the economic perspective is as important. This paper presents a process to systematically implement gateways which support the communication between test tools and SUTs with a reduced cost. The proposed solution does not preclude any interface protocol at the SUT side. This process is supported using a generic architecture of a gateway defined on top of OSGi. Any test tool can communicate with the gateway through a unique defined interface. To communicate the gateway and the SUT, basically, the driver corresponding to the SUT software interface has to be loaded
Jini Technology Applied to Railway Systems
In the world of pervasive computing where large management systems, as well as small devices, all become interconnected, the problem of the configuration and management of networks is becoming increasingly complex. System administrators have to deal with many problems due to the increasingly distributed architecture of systems. Jini, a new paradigm for the development and management of distributed systems, provides mechanisms that enable systems to plug together to form an impromptu community. This practice report demonstrates how Jini can be applied in an industrial environment, or more exactly how it can be used in the integration of embedded devices on-board trains in the back-office IT infrastructure of railway operators. We present two use cases: the first is about an on-board service that allows for remote access to an on-board diagnosis databas
Plug-and-Participate for Limited Devices in the Field of Industrial Automation
Ausgangspunkt und gleichzeitig Motivation dieser
Arbeit ist die heutige Marktsituation: Starke KundenbedĂŒrfnisse
nach individuellen GĂŒtern stehen oftmals eher auf
Massenproduktion ausgerichteten Planungs- und
Automatisierungssystemen gegenĂŒber - die Befriedigung
individueller KundenbedĂŒrfnisse setzt aber FlexibilitĂ€t und
AnpassungsfÀhigkeit voraus. Ziel dieser Arbeit ist es daher,
einen Beitrag zu leisten, der es Unternehmen ermöglichen soll,
auf diese individuellen BedĂŒrfnisse flexibel reagieren zu
können. Hierbei kann es im Rahmen der Dissertation natĂŒrlich
nicht um eine Revolutionierung der gesamten Automatisierungs-
und Planungslandschaft gehen; vielmehr ist die Lösung, die der
Autor der Arbeit prÀsentiert, ein integraler Bestandteil eines
Automatisierungskonzeptes, das im Rahmen des PABADIS Projektes
entwickelt wurde: WĂ€hrend PABADIS das gesamte Spektrum von
Planung und Maschineninfrastruktur zum Inhalt hat, bezieht sich
der Kern dieser Arbeit weitestgehend auf den letztgenannten
Punkt - Maschineninfrastruktur. Ziel war es, generische
MaschinenfunktionalitÀt in einem Netzwerk anzubieten, durch das
FertigungsauftrÀge selbststÀndig navigieren. Als Lösung
prÀsentiert diese Dissertation ein Plug-and-Participate
basiertes Konzept, welches beliebige Automatisierungsfunktionen
in einer spontanen Gemeinschaft bereitstellt. Basis ist ein
generisches Interface, in dem die generellen Anforderungen
solcher ad-hoc Infrastrukturen aggregiert sind. Die
Implementierung dieses Interfaces in der PABADIS
Referenzimplementierung sowie die GegenĂŒberstellung der
Systemanforderungen und Systemvoraussetzungen zeigte, das
klassische Plug-and-Participate Technologien wie Jini und UPnP
aufgrund ihrer Anforderungen nicht geeignet sind -
AutomatisierungsgerÀte stellen oftmals nur eingeschrÀnkte
Ressourcen bereit. Daher wurde als zweites Ergebnis neben dem
Plug-and-Participate basierten Automatisierungskonzept eine
Plug-and-Participate Technologie entwickelt - Pini - die den
Gegebenheiten der Automatisierungswelt gerecht wird und
schlieĂlich eine Anwendung von PABADIS auf heutigen
Automatisierungsanlagen erlaubt. Grundlegende Konzepte von
Pini, die dies ermöglichen, sind die gesamte Grundarchitektur
auf Basis eines verteilten Lookup Service, die Art und Weise
der DienstreprÀsentation sowie die effiziente Nutzung der
angebotenen Dienste. Mit Pini und darauf aufbauenden Konzepten
wie PLAP ist es nun insbesondere möglich,
Automatisierungssysteme wie PABADIS auf heutigen Anlagen zu
realisieren. Das wiederum ist ein Schritt in Richtung
Kundenorientierung - solche Systeme sind mit Hinblick auf
FlexibilitÀt und AnpassungsfÀhigkeit gestaltet worden, um
KundenbedĂŒrfnissen effizient gerecht zu werden
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