Routing Issues & Performance Of Different Opportunistic Routing Protocols In Delay Tolerant Network

The Delay Tolerant Networks (DTN’s) are wireless ad-hoc networks which is connected intermittently. The DTNs allow the communication between two or more wireless nodes in the situation in which the end to end connectivity cannot be achieved or rarely achieved. The DTNs are also known as the opportunistic networks. The DTNs are best applicable or suitable in an environment which is infrastructure-less. In the heterogeneous environment, the communication between two or more wireless nodes can be achieved by DTN. The selection of a routing protocol in DTN, is based on the application environment in which it is to be deployed. In this research paper, I’ve given the review of the existing DTN protocols. We have compared the performance of some existing routing protocols based on message delivery ratio, average delay and resource consumption. Keywords—DTN, Intermittent connectivity, Bundle Protocol, Opportunistic Routing Protocol, Flooding, Forwarding