Postbox DTN: It´s modelling and routing analysis

Delay Tolerant Networks rely on intermittent contacts between mobile nodes to deliver packets using store-carry-and-forward technique. The key to improve performance in DTNs is to design a greater number of transfer opportunities. Earlier several different routing strategies for DTN environment, like the Epidemic Routing, Spray and Wait, Spray and Focus, to route information in such decentralized scenarios was proposed. Routing in such environment should be effective of achieving high receivable rate with minimalistic overhead. In this paper we aim to achieve a high receivable rate keeping the number of message duplication to a significant low. We propose an architecture following the post office scenario. A persistent node is centrally attached to all other nodes and acts as a receiver if a node is down. This two hop routing protocol improves packet delivery by reducing message duplication rate in the network. It provides a better way of message delivery in challenged environments and a suitable, efficient technique of solving certain prime issues of cost overhead, replication of messages and loss due to delays.