The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The following topics are dealt with: networking and services; wireless networks; optical fibre networks; overlay networks; grid services; online and remote learning platforms.
This paper presents an architectural proposal integrating a vehicle parking service into the 3GPP IMS and describes the development of an IMS-based prototype implementing such service. The proposed service allows automatic payments to car drivers through their WLAN-enabled IMS terminals integrated in the vehicles, on the basis of the specific parking zone where the vehicle is stationed and the duration...
In a service-oriented architecture, systems communicate by exchanging messages. In this work, we propose two conversation specification language-independent models - the first based on first-order guarded automata and the latter based on attribute grammars - for describing valid client-server conversations. On the basis of the latter, we also propose a purely XML-based framework for a dynamic monitoring/validation...
In the banking sector business requirements continuously change whereas IT infrastructure investments must be amortized over years. This conflict produces very heterogeneous systems. Adopting the SOA / BPM approach helps coping with that complexity. This way, everything is a service, easing composition and integration. On top of that, strict security and reliability requirements exacerbate the need...
The present work proposes an adaptive solution to provide quality of service in Voice over IP communications. This solution is based on three components that interact inorder to achieve higher quality in voice communication. The first two consist in changing the codec and the transport protocol in real-time during a conversation; the third consists in using a forward error correction mechanism to...
Voice over IP applications at endpoint devices are typically implemented using proprietary methods and are closed and not extensible. This hinders innovation and competition. On the other hand, a number of open standards have emerged for programming network services. The SIP Servlet API is the dominant standard and is widely implemented. This paper examines the feasibility of using the SIP servlet...
In this paper we introduce the idea of integrating high security level services to support law enforcement with high-tech crime investigation. We take advantage of a process-oriented approach to model the interaction between services according to SOA principles. This approach, called static integration, is sufficient for a broad area. In a homeland security environment, however, the situation poses...
Development of dynamic open service environment for Web based systems integration become a time challenge. To improve the automation of Web services interoperation, a lot of technologies are recommended, such as semantic Web services and agents. In this paper an approach for semantic Web service discovery and propagation based on semantic Web services and FIPA multi agents is proposed. A broker allowing...
Multimedia task composition involves automatic matching and selection of multimedia services across various devices in the pervasive environment. During the composition process, various QoS attributes are considered for selection of the service components implementing those services. However, the existing approaches about multimedia service composition do not consider user's perspective about utilizing...
In this paper we present an approach to the development of monitoring solutions for processes implemented as WSBPEL service compositions. The approach allows modeling of process performance metrics in a platform-independent manner and then generating an event-based monitor model for a specific WS-BPEL process engine. We create a metamodel which enables modeling of different types of process performance...
One of the multimedia services offered by the campus network of the Polytechnic University of Valencia is TV over IP. This service works well in the devices connected directly to the wired network but we have detected some problems when the receivers access to the campus network through wireless IEEE 802.11, especially when devices roam across the campus. In this paper we propose and evaluate a server-based...
BPEL has been established as the standard for modeling business processes by orchestrating Web services. When modeling a BPEL process, users end up in basically three approaches: from scratch, by using a process template or a reference process, and by ad hoc modifying a existing process model to meet the current requirements. There is strong demand on a flexible and modularized approach for reusing...
The specifications of the protocols supporting mobility - MIPv6, NEMO - centralize their key functionalities on the home agent, which represents a single point of failure. In the context of the French research project REMORA, we have developed a solution to make home agent-based mobility protocols more reliable against the home agent failures. This paper presents the design, the implementation and...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.