Context-Aware Multicast Routing Scheme for Disruption Tolerant Networks

Disruption Tolerant Networks (DTNs) are emerging solutions to networks that experience frequent network partitions and large end-to-end delays. Several schemes have been proposed for multicast routing in DTNs assuming the availability of different amount of knowledge about network topology etc. In this paper, authors propose a node-density based adaptive multicast routing scheme which can handle different network scenarios than the existing multicast delivery schemes for DTNs that authors are aware of. The scheme can address the challenges of opportunistic link connectivity in DTNs. Simulation results show that the CAMR scheme performs better than the DTBR and OS-multicast schemes. The CAMR scheme can achieve a better message delivery ratio, with higher transmission efficiency and similar delay performance especially when the nodes are very sparsely connected.