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    STUDIA INFORMATICA - Issue no. 1 / 2003  

  Abstract:  The main aim of this paper is the development of a middle- ware platform, which will create the common abstracting level for different distributed media forming a communication group. The innovation of the presented platform consists in connecting two major aspects { the scalable architecture and the management of the quality parameters. In the same time the middleware platform has to be independent from the multimedia application that use it, and can run distributed on different platform. We define an extended object model following the recommendation of the reference model, as basis for middleware service level. The proposed distributed and hierarchical architecture for different services offers more ex- tensibility and effciency to the application. But this architecture is part of the middleware and is transparent for the user level. The proposed new architecture and measurement based management policies, make possible the continuous adaptation of the quality parameters to the modification of the requirement or the system resources at the application level, even if the network level not support guaranteed services.  
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