Topic
Differentiated service
About: Differentiated service is a research topic. Over the lifetime, 5539 publications have been published within this topic receiving 105225 citations.
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17 Apr 2007
TL;DR: The Semantic Service Bus is an advanced middleware possessing enhanced features, as compared to the conventional service buses, distinguished by the fact that it uses semantic description of service capabilities, and requirements towards services to enable more elaborate service discovery, selection, routing, composition and data mediation.
Abstract: In this paper we present a middleware for the service oriented architecture, called the Semantic Service Bus. It is an advanced middleware possessing enhanced features, as compared to the conventional service buses. It is distinguished by the fact that it uses semantic description of service capabilities, and requirements towards services to enable more elaborate service discovery, selection, routing, composition and data mediation. The contributions of the paper are the conceptual architecture of the Semantic Service Bus and a prototypical implementation supporting different semantic Web service technologies (OWL-S and WSMO) and conventional Web services. Since mission critical application scenarios (for SOA) involve complex orchestrations of services, we have chosen to utilize semantically annotated service orchestrations as the applications to employ this middleware.
50 citations
08 May 2007
TL;DR: This paper uses service expiration times obtained from pre-defined service level agreements to reduce the computational overhead of adaptation and formalizes the intuition that services whose parameters have not expired need not be considered for querying for revised information.
Abstract: Web processes must often operate in volatile environments where the quality of service parameters of the participating service providers change during the life time of the process. In order to remain optimal, the Web process must adapt to these changes. Adaptation requires knowledge about the parameter changes of each of the service providers and using this knowledge to determine whether the Web process should make a different more optimal decision. Previously, we defined a mechanism called the value of changed information which measures the impact of expected changes in the service parameters on the Web process, thereby offering a way to query and incorporate those changes that are useful and cost-efficient. However, computing the value of changed information incurs a substantial computational overhead. In this paper, we use service expiration times obtained from pre-defined service level agreements to reduce the computational overhead of adaptation. We formalize the intuition that services whose parameters have not expired need not be considered for querying for revised information. Using two realistic scenarios, we illustrate our approach and demonstrate the associated computational savings.
50 citations
TL;DR: In this paper, a method is applied to analyze the dynamics of service quality in triadic business networks, and the incorporation of a third actor may improve the understanding of the quality in dyadic service encounters.
Abstract: The unidirectional measurement and evaluation of the service quality in a specific service encounter is not enough to understand the existing service quality between two actors in a dyadic service encounter. Furthermore, a bi‐directional approach may not always be sufficient to understand the service quality in a specific service encounter. The incorporation of a third actor may improve the understanding of service quality in dyadic service encounters. Therefore, a method is applied to analyze the dynamics of service quality in triadic business networks.
50 citations
08 Apr 2002
TL;DR: The issue of facilitating service provision capabilities in the presence of (logical and physical) mobility exhibited by applications executing over ad hoc networks is addressed and a new kind of service model is built as an adaptation layer on top of an existing coordination middleware, LIME (Linda in a Mobile Environment).
Abstract: The client-server model continues to dominate distributed computing with increasingly more flexible variants being deployed. Many are centered on the notion of discovering services at run time and on allowing any system component to act as a service provider. The result is a growing reliance on the service registration and discovery mechanisms. This paper addresses the issue of facilitating such service provision capabilities in the presence of (logical and physical) mobility exhibited by applications executing over ad hoc networks. The solution being discussed entails a new kind of service model, which we were able to build as an adaptation layer on top of an existing coordination middleware, LIME (Linda in a Mobile Environment).
50 citations
05 Jul 2010
TL;DR: An approach to restriction on the service space which provided a dramatic improvement in terms of composition time and an approach to fast determination of which services produce results expected by the user are proposed.
Abstract: Web service composition is a topic bringing several issues to be resolved Our work deals with the effectiveness and scalability of service composition During composition we consider QoS and pre-/post-conditions of single services to create a composite service satisfying the user needs the best Regarding pre-/post-conditions we propose an approach to fast determination of which services produce results expected by the user, ie the post-condition of which services implicates the desired condition defined in the user goal This paper proposes also an approach to restriction on the service space which provided a dramatic improvement in terms of composition time
50 citations