A Self-Regulating Protocol for Efficient Routing in Mobile Delay Tolerant Networks

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In this paper, the authors present a novel routing protocol for mobile delay tolerant networks, called Community-based Adaptive Spray (CAS). How to maximize routing performance (delivery ratio) and minimize resource consumption (number of message copies) is a common goal in these networks. Their protocol considers the following two aspects toward this goal: selecting the intermediate nodes that are closest to the destination, based on their mobility patterns; dynamically controlling the number of message copies according to the time-to-live of a message. Experiment results demonstrate that their protocol can improve routing performance and resource consumption compared to the state-of-the-art spray-and-wait and BUBBLE protocols.