Routage proactif alterne base sur la qualite de service UMTS (French text)

The objective of our research is to present a rerouting algorithm that optimizes network resource utilization and that takes into account the QoS requirements of UMTS traffic classes. The algorithm will be applied to an IP/MPLS backbone of a mobile network that supports access to UMTS and W-LAN.; We are proposing a survivability algorithm that combines the advantages of Protection Switching and Fast-Reroute. This new algorithm is the first to take into account the UMTS quality of services requirements when computing an alternate path for protection purposes. In order to validate our approach, we have made some assumptions that allow us to better define the application domain of the mechanism. Then, we described the action performed by the algorithm in specific cases. We have concluded our work by evaluating the performance of our approach by simulations.; A simulation model has been developed to evaluate and validate the performance of our proactive alternate routing algorithm. It has been written in C using the OPNET Modeler simulation software. The simulations that have been conducted show that the algorithm is stable and offers good rerouting time and delay. The algorithm can be considered as a good solution to the issues raise by completion time and resources optimization in the context of survivability. Moreover, it has several advantages such as simple implementation, limited exchange of routing information between network nodes, and optimization of network resources. (Abstract shortened by UMI.)...