Enhanced PRoPHET routing protocol that considers contact duration in DTNs

PRoPHET is a probabilistic routing protocol for Delay Tolerant Networks (DTNs). In PRoPHET, the delivery probability is calculated based on the history of encounters and transitivity. However, if two nodes meet frequently during a short time interval, the delivery probability between these nodes increases rapidly. To solve this problem, PRoPHETv2 uses the inter-meeting time. Yet, the contact duration is still not considered. Therefore, this paper proposes an enhanced PRoPHETv2 routing protocol that considers the contact duration. Simulation results show that the proposed scheme outperforms PRoPHETv2 in terms of the delivery ratio and overhead ratio.