A Deadline Aware DTN Approach Based on Epidemic Routing

Delay Tolerant Networks (DTN) has been proposed to provide communication between nodes where they are intermittently connected. In this situation, a new routing approach, store-carry-forward, is used to deliver data between source and destination. Even though long delay is acceptable in DTN, however some applications occasionally require predetermined bounded delay. To meet this requirement, some approaches have been proposed. However, due to dependency on assumption such as infinite buffer size and mobility pattern, they suffer from deployment problem. To defeat this problem, in this paper, we propose a new probabilistic epidemic routing with time constraint and delay. We adjust forwarding probability on each node depending on bounded delay, elapsed time, and current networks environment. Simulation results reveal that the proposed scheme can meet required delivery ratio and consume little resource rather than original one and competitive protocol.