Enhancement of PRoPHET routing in Delay Tolerant Networks from an energy prospective

In a Delay Tolerant Network (DTN), nodes are intermittently connected. In order to deliver message from one node to another, message is copied and forwarded to another node when the connection between the nodes is established. The node that receives the message stores it and forwards the copy of it to another node it encounters. The process is repeated until the destination node is encountered or message life time expires. PRoPHET (Probabilistic Routing Protocol Using History of Encounters and Transitivity) is one of the major DTN routing protocols. However, PRoPHET does not consider energy consumption of nodes. Energy consumption of mobile wireless devices has been a major issue recently as the devices are ubiquitously used. In this paper, we propose an Enhanced PRoPHET routing protocol that considers energy of nodes. We extensively simulated our proposal and have shown that our proposed protocol performs better than the original PRoPHET routing protocol in terms of energy consumption, message delivery probability and overhead ratio.