A study of improved DTN routing for disaster situations

Abstract

DTN(Delay Tolerant Network) is a technology in which messages are delivered to surrounding nodes in a situation in which the infrastructure of existing communication networks is not perfectly prepared, or in a communication environment that is not operating normally. In other words, this is the technology that can be applied to disaster sites where the communications infrastructure is severely damaged, in diverse disaster situations such as earthquake, natural disasters, and tsunami. Most of the DTN Routing Protocols as mentioned above are inefficient routing algorithms, as the methods do not consider the moving direction of nodes and the probability that nodes will meet the destination. In the DTN routing protocols proposed thus far, the routing cost, buffer size, and energy consumption should be considered in case of message delivery to adjacent nodes. There has been no clear criteria provided thus far on which node on the path may deliver message copies and how the priority may be decided, and the existing criteria are ambiguous. In most cases, they depend on the directional information of nodes or the visit probability of nodes. In this paper, an attempt is made to propose a routing protocol that may solve the problem of transmission rate reduction between nodes in disaster situations. © 2016 International Information Institute.