Delay tolerant networks (DTNs) are a new development in network research field. DTNs are the networks where no end-to-end paths are present between nodes for a long period of time. DTNs are wireless networks where disconnections and delays are high. DTN works on the principle of store, carry, forward mechanism. A store, carry, forward mechanism is a mechanism in which when a node receives a packet then it stores in its buffers, and when next intermediate node come in range of network then it forward the packet to that node. To forward packets from one hop to another DTN provides routing scheme. Each scheme has its own pros and cons. We propose a scheme in which we compute duration of contact, most recent contact and most frequent contact. After calculating these parameters we can create a contact graph. A contact graph can define the contact between nodes, and also provides nodes having highest chances of packet delivery. Proposed scheme can improve delivery ratio, and also reduce overhead ratio. Simulation of proposed scheme can be done on ONE simulator. Keywords: delay tolerance network (DTN), opportunistic network environment (ONE), contact graph, most frequent nodes, most recent contact Cite this Article Aneja M, Garg V. Contact-Based Routing to Improve Delivery Ratio in DTN. Journal of Network Security (JoNS). 2015; 3(2): 36–43p.
