A Framework to Improve Sustainability of Delay in DTN Environment

Delay-tolerant networks (DTNs) have the great potential in connecting devices and regions of the world that are presently under-served by current networks. A vital challenge for Delay Tolerant Networks is to determine the routes through the network without ever having an end to end, or knowing which "routers" will be connected at any given instant of time. The problem has an added constraint of delay at each node. This situation limits the applicability of traditional routing techniques which categorize lack of path as failure of nodes and try to seek for existing end-to-end path. Approaches have been proposed which focus either on epidemic message replication or on previously known information about the connectivity schedule. In this book we have considered that the protocol have the previous knowledge of routing and computed delay on the basis of replication of packets on the nodes and on the basis of total time to transfer the packets from one node to other node. This book puts some light to prevent large delays due to replications and the total time for sending the packets.