An Encounter-Based Multicast Scheme for Disruption Tolerant Networks

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Executive Summary

Some ad hoc network scenarios are characterized by frequent partitions and intermittent connectivity. Hence, existing ad hoc routing schemes that assume that an end-to-end path exists from a source to a destination do not work in such challenging environment. A store-and-forward network architecture known as the Disruption Tolerant Network (DTN) has been designed for such challenging network environments. Several unicast and multicast routing schemes have been designed for DTNs. However, the existing multicast routing schemes assume a route discovery process that is similar to the existing ad hoc network routing approach. Thus, in this paper, the authors design an Encounter-Based Multicast Routing (EBMR) scheme for DTNs which uses fewer hops for message delivery.

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