Gestion de la mobilite des services dans un environnement de telephonie IP: Une approche basee sur les agents mobiles (French text)

In this master thesis, we propose an innovative architecture for the provision of services in IP telephony. In this new architecture, the services are carried by a mobile service agent (MSA). We then propose models and algorithms of mobility, which make it possible to manage service mobility. The updating agent model proposes an approach purely based on the mobile agents, where a mobile agent carries the modifications to be made and updates the MSA locally. The other model rather proposes a hybrid approach, which combines the mobile agent technology and the client/server technology. Indeed, for this last model, the updating is done remotely via java RMI. The performance analysis shows that the hybrid model is better in all the cases as regards to the updating time, whereas for the load induced in the network, the agent approach is better in certain cases. Indeed, for large services, it is more beneficial to use an agent that will carry the services rather than to use a client/server approach because it saves the load due to the transmission of the intermediate results. We finally conclude this thesis by retaining the hybrid approach, which gives better results in several cases. (Abstract shortened by UMI.)...