Abstract
Nodes in mobile ad hoc networks (MANETs) sometimes do not have a completely connected path between them because the connectivity of a mobile network cannot be maintained for long periods. An intermittently connected MANET (ICMANET) is usually a delay tolerant network (DTN), which is capable of tolerating lengthy delays. It is not possible to achieve full connection with a DTN. The probabilistic routing protocol using the history of encounters and transitivity (PRoPHET) is the most popular DTN routing protocol. However, PRoPHET has demerits such as high resource consumption, message spread and duplication. To overcome these disadvantages, this paper proposes a method for selecting an intermediate node as an optimal carrier to disseminate messages from the source to the destination. Simulation results indicate that the proposed method provides improved delivery ratio, fewer delays and lower resource consumption, message spread and duplication than the conventional PRoPHET and fuzzy PRoPHET protocols.
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