Publications Search Results

Now showing 1 - 10 of 25
  • Publication
    Web applications on the move: Opening up new opportunities for mobile developers
    ( 2010)
    Kress, A.
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    Linner, D.
    ;
    Steglich, S.
    As a new platform for mobile applications the "Mobile Web" has recently gained importance. However, the Web as an application platform presents a number of limits to the application developer when compared to other application platforms, e.g. limited access to the local functionality of the mobile device. Those limits can be addressed through so-called "hybrid" application platforms which combine the best from the worlds of Web applications and locally installed applications. We believe that such hybrid applications will gain a significant market share in the nearby future. In this chapter we reflect the current state of those hybrid application platforms and analyze their advantages: After deriving general requirements for future mobile application platforms, we discuss the promises and limits of the Mobile Web platform and describe recent activities of public bodies addressing the discussed limits through "hybrid" extensions. Finally, we discuss the FOKUS Mobile Widge t Runtime as a prototype for a hybrid application platform, and propose future research directions in this field.
  • Publication
    Real-time communication enabler for Web 2.0 applications
    ( 2010)
    Linner, D.
    ;
    Stein, H.
    ;
    Staiger, U.
    ;
    Steglich, S.
    In face of the markets growing around community-centric services and applications telecommunication companies adapt their products to new technology landscapes. We investigate the possibilities of network operators to contribute to the quality of a service that enables real-time user interactions for hypertext user interfaces. The central quality criterion considered here is the latency in browser-based user-to-user interactions. We introduce the context of our work, the challenges we are facing and the conclusions we draw. Taking this as foundation we describe a bipartite architecture that combines an extension of the hypertext protocol stack with application-controlled network quality of service.
  • Publication
    Automatic routing of semantic SIP messages in IMS
    ( 2009)
    Jacob, C.
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    Pfeffer, H.
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    Linner, D.
    ;
    Steglich, S.
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    Li, Y.
    ;
    Ma, Q.F.
    The IP Multimedia Subsystem (IMS) is considered as a valid possibility to tackle the seamless provision of multimedia services in both packet switched and circuit switched networks. The Session Initiation Protocol (SIP) is applied as a protocol for signaling, but is not yet used to fully exploit the potential of dynamic and context-aware service provision. In this paper we present a method to semantically enhance SIP. Tailored to this method, a novel kind of proxy is introduced to enable the automatic interpretation of user requests in a context-aware manner. The decoupling of service request and response in terms of semantic addressing facilitates the immediate publication of new services in IMS and eases the creation of user requests.
  • Publication
    BIONETS: Bio-inspired paradigms for service provisioning in pervasive computing environments
    ( 2009)
    Chlamtac, C.
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    Miorandi, D.
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    Steglich, S.
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    Radusch, I.
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    Linner, D.
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    Huusko, J.
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    Lahti, J.
  • Publication
    Definition of a Web 2.0 gateway for 3rd party service access to next generation networks
    ( 2008)
    Blum, N.
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    Linner, D.
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    Krüssel, S.
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    Magedanz, T.
    ;
    Steglich, S.
    Modern telecommunication networks and classical roles of operators are subject to fundamental change. Many network operators are currently seeking for new sources to generate revenue by exposing network capabilities to 3rd party service providers. At the same time we can observe that applications on the World Wide Web (WWW) are becoming more mature in terms of the definition of APIs that are offered towards other services. The combinations of those services are commonly referred to as Web 2.0 mash-ups. This report describes our approach to include Next Generation Networks (NGN)-based telecommunications application enabler into Web 2.0 mash-ups by defining a JavaScript-based service exposure API that allows easy and straight forward integration of telecommunications en-ablers into such mash-ups. The platform is validated through an application including telecommunications-based services as conferencing, rich presence and location, as well as the community portal Facebook and Google maps.
  • Publication
    Modeling and controlling dynamic service compositions
    ( 2008)
    Pfeffer, H.
    ;
    Linner, D.
    ;
    Steglich, S.
  • Publication
    SmartWare - framework for autonomic application services
    ( 2008)
    Linner, D.
    ;
    Pfeffer, H.
    ;
    Jacob, C.
    ;
    Kress, A.
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    Krüssel, S.
    ;
    Steglich, S.
  • Publication
    Dynamic adaption of workflow based service compositions
    ( 2008)
    Pfeffer, H.
    ;
    Linner, D.
    ;
    Steglich, S.
  • Publication
    CAPgets: Mobile web runtime environment for community applications
    ( 2008)
    Linner, D.
    ;
    Krüssel, S.
    ;
    Steglich, S.
    The Web as a platform for networked applications is pushing for mobile phones. Will the mobile Web be about the same as the 'desktop Web' or an enabler for a completely new kind of applications? Based on our experiences in the area of location-based community applications for mobile devices, we developed a Web runtime environment for mobile phones named CAP-gets. In this work we describe the requirements we started from, the resulting architecture, a first implementation of the architecture for Java-enabled mobile phones, and some simple examples for a location-based, mobile Web application.
  • Publication
    The semantic data space for loosely coupled service provisioning
    ( 2007)
    Linner, D.
    ;
    Radusch, I.
    ;
    Steglich, S.
    ;
    Jacob, C.