Objective The objective of the project was to develop an open services architecture, and to show its practical relevance to the evolution of services for IBC. It achieved this objective by creating a common architectural approach and a system-level, object oriented architecture for service software; included in this architectural framework were both the control and management aspects associated with telecommunications software.Technical Summary During 1989, the project demonstrated the feasibility of creating an open services architecture and its supporting infrastructure for the IBC. The ROSA architecture was defined using an object-oriented paradigm (model). An object encapsulates data, processing and communication. The behaviour and structure of an object is described by its type using a formal specification language. The boundaries of the objects are opaque and only the services provided are visible to other objects. Objects interact by synchronously exchanging messages. Distinct instances of ROSA objects operate concurrently and can be distributed. Objects were classified into three categories: the Service Specification Framework (SSF), the Object Support Environment (OSE) and the Fundamental Object Mechanics (FOM). Objects in the SSF provide a pool of generic, telecom-oriented objects such as call handling and user agents. The OSE consists of entities that provide support for computation with objects in a distributed environment. The FOM is a set of primitives that are not subject to further object- oriented decomposition within the framework of the architecture. ROSA has addressed the architectural problems associated with the management of real physical entities in an IBC telecommunications environment. This has resulted in service management being an integral part of any service specification. Outline requirements for tool support were identified, to enable the realisation of services defined using the ROSA architecture. How such services may be specified by their behavioural and constructional properties can be determined by formal models and transformed into an abstract target language suitable for multi-vendor implementation. The successful provision of open services in IBC will depend critically upon the integration of three service specification perspectives into the overall ROSA architectural framework. R1068 ROSA project generated a new project - R1093 ROSA II. Fields of science natural sciencescomputer and information sciencessoftwareengineering and technologyelectrical engineering, electronic engineering, information engineeringinformation engineeringtelecommunications Programme(s) FP2-RACE 1 - Community programme (EEC) in the field of telecommunications technologies (RACE), 1987-1992 Topic(s) Data not available Call for proposal Data not available Funding Scheme Data not available Coordinator BRITISH TELECOM PLC (BT) EU contribution No data Address United Kingdom See on map Total cost No data Participants (13) Sort alphabetically Sort by EU Contribution Expand all Collapse all CET Portugal EU contribution No data Address See on map Total cost No data Ericsson Telecom AB Sweden EU contribution No data Address See on map Total cost No data Fondazione "Ugo Bordoni" Italy EU contribution No data Address See on map Total cost No data France Telecom France EU contribution No data Address See on map Total cost No data Gesellschaft für Mathematik und Datenverarbeitung mbH Germany EU contribution No data Address Hardenbergplatz 2 10623 Berlin See on map Total cost No data IBM France SA France EU contribution No data Address See on map Total cost No data PTT Netherlands Research Netherlands EU contribution No data Address See on map Total cost No data Plessey Company plc United Kingdom EU contribution No data Address See on map Total cost No data STC plc United Kingdom EU contribution No data Address 1b Portland Place W1N 3AA London See on map Total cost No data Sistemas Expertos Spain EU contribution No data Address See on map Total cost No data Synergie Informatique et Développement France EU contribution No data Address 12 bis rue des Pavillons 92804 Puteaux See on map Total cost No data TFL Denmark EU contribution No data Address See on map Total cost No data Telefonica Sistemas SA Spain EU contribution No data Address See on map Total cost No data