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Scalable multicast routing in MANETs using sender-initiated multicast meshes

 

We present Hydra, the ?rst multicast routing protocol

for MANETs that establishes a multicast routing structure

approximating the set of source-rooted shortest-path trees

from multicast sources to receivers, without requiring the

dissemination of control packets from each source of a multicast group. Hydra accomplishes this by dynamically electing a core for the mesh of a multicast group among the

sources of the group, and aggregating multicast routing

state in the nodes participating in multicast meshes, so that only control packets from the core are disseminated towards the receivers of a group. We prove that Hydra establishes correct routes from senders to receivers of a multicast group when multicast state information is aggregated. We also present simulations results illustrating that Hydra attains comparable or higher delivery ratios than ODMRP, but with considerably lower end-to-end delays and far less communication overhead. Results are shown for scenarios using 802.11 and TDMA as the MAC layer protocols.

 
citation

Menchaca-Mendez, R.; Garcia-Luna-Aceves, J. J. Scalable multicast routing in MANETs using sender-initiated multicast meshes. 5th IEEE International Conference on Mobile Ad Hoc and Sensor Systems (MASS 2008); 2008 September 29-October 2; Atlanta, Georgia.