Proposing Energy Efficient Routing Strategy for Delay Tolerant Network

Abstract

Delay-tolerant (DTN) networks are the result of the evolution of mobile networks where there may be no end-to-end path. It enables communication between source and destination without the support of a fixed network infrastructure. The main principle of delay tolerant networks for message routing is the store-transport-forward approach, in which intermediate nodes store data for transmission until they find a suitable relay node to deliver messages on route to the target destination node. And DTN has many applications in the DTN network, such as wildlife monitoring, disaster management, assistance in detecting the movement of vehicles and traffic jams and military battlefields. Several routing and forwarding strategies have been proposed in recent years. The main difference between the various DTN routing protocols is the amount of knowledge available to route messages. The store-carry and forwarding approach of DTN routing protocols generates many copies of a message on networks that consume node resources such as energy and buffer space. The main challenge for delay tolerant networks is how to develop energy- efficient routing strategies and use fewer network resources. This study focuses on the proposed energy efficient DTN routing strategy to tackle routing problems using node energy and distance to node information. Also investigate the performance of the DTN routing protocol with the metrics delivery ratio, overhead ratio and hopcount using the Opportunistic Network Environment (ONE) simulator. The evaluation compares the proposed energy efficient routing strategy with the per hop routing strategy in terms of delivery ratio, overhead ratio, and hopcount. The results show that the energy efficient routing strategy outperforms on per hop routing with a higher message delivery ratio, less overhead and higher hop counts. At optimal message generation time intervals, delivery ratio of energy efficient routing strategy (EERs) is 91% for energy efficient routing strategy and while 88% per hop routing respectively. In terms of overhead ratio, energy efficient routing strategy is less than per hop routing strategy.