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Comparative Analysis of Hydra and Link Stability based Multicast Routing Protocols in Mobile Ad Hoc Networks

group oriented service which is said to be the primary application that are addressed by Mobile Ad hoc Networks (MANETs) in recent years, multicast routing is used. Hence there is a need to design stable and reliable multicast routing protocols for MANETs. Hydra, the first multicast routing protocol for MANETs 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, so that only control packets from the core are disseminated towards the receivers of a group. Another mesh based multicast routing protocol that finds stable multicast path from source to receivers is also presented in this paper. Data packets are forwarded through the stable paths in a mesh, which are found based on selection of stable forwarding nodes that have high stability of link connectivity. The goal of this paper is to make a comparative analysis on the performance of Hydra and Link Stability based Multicast routing Protocols. General Terms: MANET, Multicast Routing Protocols.