DTN Routing Protocols on Two Distinct Geographical Regions in an Opportunistic Network: An Analysis

There is a critical scenario in geographical regions where the exchange of information between two mobile nodes could hardly be possible if there does not develop a straight path between them. To overcome this problem an opportunistic path is established using the store-and-forward art of message sending in an opportunistic network, also called as delay tolerant network as in this network no direct path exists for an abrupt change of network topology. In this research, we investigate the impact of message copies in two distinct geographical regions in terms of delivery probability, average latency, overhead ratio, hop count, average buffer time, and number of contacts using a Java unified simulator, called opportunistic network environment. Hence, we see that the size of a network can impact the functioning of routing strategies of the effect of message copies where lower size region shows better performance, i.e., having higher delivery and lower latency for properly utilizing the message copies. The drawback in lower size region is to have higher overhead, hop count and buffering time due to the huge replication of message copies.