An Efficient Data Dissemination Protocol For Content-Based Communication In Disconnected Manets

Opportunistic Networking is a kind of communication in which nodes or hosts that compose the network must store, carry and forward a message and must also keep as much messages as possible to increase the chance of sharing them to other nodes. In this type of network, nodes are updating continuously their cache according to their interest. Thus deleting a message in a cache when its deadline is reached reduces the possibility of carrying and sending it to other nodes. According to some realistic scenarios, a node may be interested in a content that has just been discarded from a cache. Moreover, cache management in the same area of communication is important for it increases the delivery rate of a message.The actual thesis presents a protocol that supports communication in sparse and disconnected Network and addresses the problems mentioned above by designing a content notification scheme and a forwarding decision algorithm based on the expiring time of messages in disconnected Mobile Ad hoc network scenarios. Experiments and simulations show that these two approaches of data dissemination we propose improve the content delivery rate and enable fast dissemination of messages.This thesis has also explored deeply how a communication is possible between end-to end systems that belong to some difficult network topologies. It gives also a clear explanation about the opportunistic network deployment and delay tolerant networking.