Objectif
Over a period of 30 months, the SCREEN project will develop an approach for service creation targeted to multivendored environments, supporting CORBA and TINA. The project, that was started in September 1996, aims to consolidate and extend existing and emerging technologies to produce a seamless tool-supported approach to component-based service creation. Field trials play a key role in exercising and demonstrating the project results in real service environments. The primary objectives of the project are:
- to define and demonstrate service creation environments (SCEs) targeted to specific service architectures and to distributed processing environments (e.g. TINA, CORBA),
- to demonstrate creation of services from reusable components,
- to demonstrate the effectiveness of SCEs in treating quality of service (QoS) constraints and service interaction concerns,
- to promote the use of SCEs by means of trials and documenting sound engineering practices for service creation.
The project results are intended to:
- cover a wide spectrum of services,
- be applicable to a variety of business and technological contexts,
- address the needs and profiles of a wide range of service providers.
Expected Achievements
- Documented sound engineering practices for component-based service creation targeted towards a TINA environment, addressing the needs of a multitude of users,
- SCEs assembled from existing methods, techniques and tools, adapted where appropriate, to support a wide range of services including multimedia,
- Practice and associated tools for component development, composition/decomposition, reuse and maintenance,
- Shared component repository for use mainly by external trials and ACTS Service Architectures projects,
- Results of the trials validating the assembled SCE and the engineering practices,
- Inputs to a book documenting the engineering practices and their use for developing telecommunication services.
Expected Impact
- Definition of service creation practices to enable rapid service creation catering for the needs of all potential categories of users (with different profiles, needs and environments).
- Exploitation of existing commercial tools.
- Substantial contribution to TINA.
- Demonstration of components re-use through the provision of a shared component repository.
- Contribution to the ACTS consensus process and to standardisation.
Technical Approach
The SCREEN technical approach has three streams of work:
1. To define sound engineering practices for service creation targeted to TINA platforms Recent results in the areas of service creation will be refined and integrated with TINA concepts. This will bridge the gap which has resulted from the hitherto independent development of these two areas, and facilitate achievement of professional standards for service creation across a wide range of European organisations. The engineering practices will be documented as a kind of user manual for service creation addressed to service developers. It will therefore be based on use of a dedicated set of methods, tools and languages and it will cover service creation for any service domain for which the TINA DPE provides distributed provisioning.
2. To enable the tools supported by the engineering practices to interwork and to assemble an SCE from them
The service engineering practices will be based on use of existing commercial tools. Tool development in SCREEN will therefore be limited, but some tool work is anticipated to allow the involved tools to interwork.
3. To evaluate the SCREEN service creation engineering practices and resulting SCE by means of internal and external trials In order to iteratively test and improve the engineering practices, SCREEN will perform a number of internal and external trials which will validate the key aspects of the engineering practices: Stepwise development, service creation roles and their interface, reuse, use of the DPE primitives, handling of user-presentation and feature interaction handling.
Summary of Trial
There are two internal trials involving information networking architectures and two external trials: one involving the ACTS project VITAL (TINA based) and one with the ACTS project DOLMEN (TINA-OSA/mobility, i.e. OSAM based).
Internal Trials
The main purpose of these trials is to demonstrate the combination of existing service components with newly created ones. The existing components used are generic components for multi-media multi-party services, while new components are developed to realise the learning and information retrieval services. These trials will enable comparison of the SCREEN approach to component based service creation with current methods for the preparation of telematic learning material with regard to cost and quality of service.
Life Long Learning on Demand Trial
The objective of this trial is to realise a residential learning service. This service will enable a student to view telematic learning material in a synchronised manner, enabling automatic monitoring of progress, selective editing and augmentation of main course material, note-taking and revision.
Digital Library Trial
The Digital Library trial involves building an information service, and is intended to demonstrate the creation of a distributed repository and retrieval service for multi-media information.
External Trials
These trials are carried out in collaboration with two other ACTS projects to demonstrate the use of SCREEN engineering practices to create service components.
VITAL Trial
The VITAL project is demonstrating and validating the development, deployment, management and use of complex heterogeneous service features on an Open Distributed Telecommunication Architecture (ODTA) defined in terms of reusable components. The cooperation between VITAL and SCREEN is made on two levels:
- VITAL provides its service architecture to SCREEN, which will create some value added services on it;
- VITAL uses the SCREEN service creation methods and tools in its second trial. DOLMEN Trial
The SCREEN service creation methods and tools will be used for the creation of components for an accounting and billing service for the Hypermedia Information Browsing service to be integrated in the DOLMEN final trial. It is noted that both SCREEN and DOLMEN use CORBA as their target distributed processing support environment. The DOLMEN trial will demonstrate the applicability of SCREEN practices to the development of component-based management services in addition to end-user services.
Key Issues
- Engineering practices for service creation for TINA.
- Service Creation Environments.
- Shared components repository.
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France
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