A Reference Model for Service Oriented Middleware

From the software engineering perspective, the notion of Service Oriented Architecture (SOA) has been receiving significant attention within the software design and development community. This attention has led to the proliferation of conflicting characterizations of SOA, resulting in an ambiguous understanding of SOA entities and relationships among them. To achieve a common understanding, OASIS and SeCSE propose reference models that introduce a comprehensive ontology for modeling software services around the well known service-oriented interaction pattern. However OASIS and SeCSE models abstract the actual interaction pattern runtime support, which is generally provided by a Service Oriented Middleware (SOM). In this paper we propose a reference model for architecting SOM solutions over next generation networking environment and evaluate it by designing a conforming lower-level model for the SOM developed for the PLASTIC project

WS-GUARD: enhancing UDDI Registries with on-line testing capabilities

Abstract This thesis investigates the Service Oriented Architecture and in particular the runtime discovery of Web services through the development of an empowered UDDI registry called WS-GUARD (Guaranteeing Uddi Audition at Registration and Discovery). We start by presenting the Audition framework, a specially conceived framework that applies the idea of testing during the Web service registration in the UDDI registry and then we study the practical implications of its implementation focusing on the most advanced Web service technologies. This thesis aims at modifying and extending the registration protocol of Web services into UDDI registries in order to introduce a testing phase before actual service publishing: only those services that pass the audition are admitted in the registry and become publicly available at runtime. A complete prototype implementation of WS-GUARD is described and analysed. Riassunto analitico La tesi ha investigato l'ambito Service Oriented Architecture e in particolare il run-time discovery di Web service attraverso la realizzazione di un registro UDDI potenziato, denominato WS-GUARD (Guaranteeing Uddi Audition at Registration and Discovery). Principale obiettivo del lavoro è stato la modifica dei protocolli di registrazione del registro UDDI. Tale modifica è stata rivolta all'introduzione di una fase di testing preventiva alla tradizionale fase di registrazione. Ammettendo alla registrazione soltanto quei servizi che superino la fase di verifica si intende fornire maggiori garanzie sulla qualità dei servizi che saranno resi dinamicamente reperibili (discovered) a tempo di esecuzione. La tesi discute le modifiche proposte e ne fornisce un'implementazione reale

CHOReOS perspective on the Future Internet and initial conceptual model (D1.2)

The D1.2 deliverable outlines the CHOReOS perspective on the Future Internet and its conceptualization. In particular, the deliverable focuses on: - Definition of the Future Internet and related Future Internet of Services and (Smart) Things, as considered within CHOReOS, further stressing the many dimensions underpinning the Ultra-Large Scale of the Future Internet; - Definition of the initial conceptual model of the CHOReOS Service-Oriented Architecture (SOA) for the Future Internet, identifying the impact of the ULS dimensions upon the traditional SOA paradigms and associated infrastructure

A UML 2.0 Profile for Architecting B3G Applications

Abstract. B3G is an emerging network technology which conceives the convergence of telecommunication and IP-based networks for providing enhanced services able to transfer both voice and non-voice data through wired and wireless networks. Moreover, B3G networks can be no longer considered as “passive ” entities which only transport data between endpoints, but they must be considered as “active ” parties that have their own behavior and provide services. This creates a completely new application domain where applying current software engineering design tools, such as software architectures, fails. In fact, dealing with B3G networks requires to explicit low-level details usually abstracted by the architectural descriptions. To this extent, we present an ongoing work on investigating B3G-oriented application modeling. In particular, we propose an enhanced UML profile to define and analyze software architectures that explicitly exploit the B3G domain properties.

Telecommunication Economics

This book constitutes a collaborative and selected documentation of the scientific outcome of the European COST Action IS0605 Econ@Tel "A Telecommunications Economics COST Network" which run from October 2007 to October 2011. Involving experts from around 20 European countries, the goal of Econ@Tel was to develop a strategic research and training network among key people and organizations in order to enhance Europe's competence in the field of telecommunications economics. Reflecting the organization of the COST Action IS0605 Econ@Tel in working groups the following four major research areas are addressed: - evolution and regulation of communication ecosystems; - social and policy implications of communication technologies; - economics and governance of future networks; - future networks management architectures and mechanisms