Jürgen Tacken

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In the near future, the trend of user-generated content and services currently observable in the Internet domain will also affect the mobile environment: mobile users will become able to easily create content and small services while on the move and offer them to social communities. Mobile users will no longer be pure consumers, they will also become(More)
This paper describes the hierarchical, graphical SEA Language. The SEA Language relies on extended Predicate Transition Nets that unambiguously deene the semantics of graphical system speciica-tions. These nets are also used as a basis for simulating/animating system speciications. The SEA Language allows to easily incorporate several user deened or(More)
This article presents our prototypical implementation of enabling services for context-aware real-time charging and billing based on the international Parlay X standard. The work is part of an open SOA platform allowing easy third-party composition of context- aware mobile services. The article illustrates why and how the standardized Parlay X Web Service(More)
I n the past, more and broader roads have been built to manage the growing traffic. However, these approaches will be insufficient for future traffic management, because of environmental concerns and a lack of space, especially in urban areas. Since 1970, centralized traffic-control systems have been installed to meet the demand of increasing mobility.(More)
This paper addresses the specification of security modules in a mobile digital rights management (DRM) approach with a focus on copy detection mechanisms. The presented DRM approach aims at enhancing the latest DRM standard of the Open Mobile Alliance (OMA). In particular, we present a completed DRM infrastructure, introduce additional entities for billing(More)
Personalized and context-aware services are of high interest for mobile network operators (MNOs) to keep existing and win new subscribers. Although such services are already available, they are frequently offered by third parties in a rather stand-alone manner. The challenge is to come up with appropriate interfaces that allow (a) third parties to offer(More)
In this article, we describe a service creation environment (SCE) that allows for protocol- and technology-independent development, deployment, and maintenance of interactive, menu-driven mobile services for cellular networks. The presented SCE eases the maintenance of mobile services, in particular by means of versioning and access right management. The(More)
1 Introduction Today's embedded systems (ES) are characterized by more and more parallelism, distribution over different locations and hard real-time (RT) requirements. Consequently, the modern, structured design process has to deal with heterogeneous requirements and restrictions. Especially the integration of HW-design tasks with SW-design tasks and(More)
This article presents a concept to integrate real-time rating and charging functionality into a federated cloud environment. It is part of the work in the ITEA2 EASI-CLOUDS project that aims at advancing cloud computing in Europe, Egypt and Korea with the main objective to provide a federated cloud computing infrastructure with enhanced reliability,(More)