EA-PRoPHET: An Energy Aware PRoPHET-Based Routing Protocol for Delay Tolerant Networks

In a Delay Tolerant Network (DTN), nodes areintermittently connected. In order to deliver a message froma source node to a destination node, the message is copiedand forwarded to an intermediate node when the connectionbetween the nodes is established. The node that receives themessage stores it and forwards the copy of it to another node itencounters. The process is repeated until the destination nodeis encountered or the message's life time expires. PRoPHET(Probabilistic Routing Protocol using History of Encountersand Transitivity) is one of the major DTN routing protocols. However, PRoPHET does not consider energy consumption ofnodes. Energy consumption of mobile wireless devices has beena major issue recently as the devices are ubiquitously used. In this paper, we propose an Energy Aware PRoPHET thatconsiders energy of nodes and available free buffer of nodesfor storing forwarded messages. We extensively simulated ourproposal and have shown that our proposed routing performsfar more better than PRoPHET in terms of energy consumption, extension of network life, message delivery probabilityand overhead ratio.