Protocol synthesis from SMIL-based scenarios and its implementation in distributed environment

In order to design and develop multi-user multimedia presentation systems, we propose a protocol synthesis method considering QoS requirements for networks. In this method, the scenario of each entity (node) is specified in a SMIL-like language. A specification of the total system (service specification) is described as a set of all users´ SMIL-like scenarios and control scenarios specifying the interaction between entities. For a given service specification, network topology, link capacity and required bandwidth for each media-object, a set of protocol entity specifications (protocol specification) is automatically derived. The derived protocol entity specifications includes (1) the behavior of each node, (2) communication among other nodes, and (3) each object´s transmission path. We have been developing an execution engine for the SMIL-like language which supports dynamic QoS controls and user interaction