Multimedia Multicast Protocols Based on Multimedia Models

In multimedia distributed applications such as videoconferencing, real time data exchange requires formal models to design and specify the Quality of Service (QoS) of such multimedia communication. The proposed multimedia multicast protocols are based on enhanced Timed Petri Nets multimedia models. These models allow synchronised data streams to be exchanged in partial order and reliability, according to the required QoS. So, using a multicast monomedia transport sub-layer, we are able to design and implement multicast multimedia transport protocols, in which the multimedia synchronisation is defined in our multimedia models. It will be shown how these protocols have been designed to support multicast communication. All these protocols must be deployed in current networks, without operator support. This deployment will be done using active networking facilities to download the required code remotely on selected nodes. Experiments have given the first implementation results on European network as defined in EU project “GCAP”.