Routing Protocols in Delay Tolerant Networks

Delay Tolerant Network (DTN) can be defined as an approach to Computer Network Architecture which provides a promising solution that seeks to address the technical issues in the regions where end-toend network connectivity may lack continuously or is not available. These problems are aggravated by end nodes with limited power or memory resources. In DTNs, the intermediate nodes on a Transmission path are expected to store, carry, and forward the in-transit messages (or bundles) in an opportunistic as well as conciliatory way, which is called opportunistic data forwarding i.e. it follows Store and Forward Technique(SFT). To make imparting of information possible, intermediate nodes take responsibility or charge of the data being imparted or transferred and forward it as the opportunity arises. Both links and nodes may be inherently fickle and disconnections may be lasting. To realize the DTN vision, routes must be found over multiple unreliable, at regular intervals connected hops. To address the apt routing protocols in DTNs, we in this paper have discussed the various routing protocols in DTN and their comparisons on performance, cost, delay, probability of message delivery etc.