A sector-based scalable overlay multicast protocol in mobile ad hoc networks

Authors:
Ju-Il Lee;Young-Chul Shim
Affiliations:
Department of Computer Engineering, Hongik University, Seoul, Korea;Department of Computer Engineering, Hongik University, Seoul, Korea
Venue:
ICCOM'06 Proceedings of the 10th WSEAS international conference on Communications
Year:
2006

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Abstract

Multicast is an essential mechanism in ad hoc network application and many multicast protocols have been proposed. But most of them are network-layer protocols and require not only member nodes but also non-member nodes on multicast trees to maintain multicast routing state, which makes multicast routing complicated and less scalable. To overcome this problem, application-layer multicast, or overlay multicast, protocols have been proposed. In this paper we propose a new overlay multicast protocol, called SSOM, for ad hoc networks. Using the concept of sectors, SSOM builds a hierarchical multicast tree of two levels: high-level source-based trees for sources and low-level shared trees for receivers. SSOM handles both network dynamics and group dynamics efficiently. Performance of SSOM is analyzed through simulation.