Dynamic approach to reassign tasks when servers breakdown in a Multimodal Information System

The challenge of multimodal information systems is to provide transport's customers with pertinent real time information during their travels. Unfortunately, the exponential growth of services and information providers available on large networks increases the system decision's difficulty to offer best solutions in term of cost and response time. The complexity of such systems can be properly described in terms of interaction between different kinds of autonomous entities. Therefore we propose a multi-agent system, using mobile agent's technology, which is able to reduce network load and overcome its latency. Furthermore, this system is able to provide travellers pertinent interactive information in any chosen data format, taking into account their mobility. However, huge networks suffer from a high incidence of network errors. For this problematic, we propose in this paper a services reassignment process to find rapid solutions in spite of possible occurring trouble through the information providers' network (crash, bottleneck, failure...)