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A New Efficient Geographic Multicast Protocol in Multicasting over Mobile Ad Hoc Networks for Qos Improvements
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A Mobile Ad-hoc Network (MANET) is a self configuring network composed of mobile nodes without any fixed infrastructure. In a MANETs, there are no difference between a host node and a router so that all nodes can be source as well as forwarders. Moreover, all MANET components can be mobile. Group communications are important in Mobile Ad hoc Networks (MANET). Multicast is an efficient method for implementing group communications. But, it is big challenge to implement the well-organized and scalable multicast in MANET due to the difficulty in group membership scheme and multicast packet forwarding over a dynamic topology. During recent years several multicast protocols have been designed specifically for MANETs. These protocols all follow the traditional multicast approaches. In this paper we propose a New Efficient Geographic Multicast Protocol (EGMP). EGMP uses a virtual-zone-based structure to implement scalable and efficient group membership scheme. A zone based bidirectional tree is constructed to achieve more efficient membership management and multicast delivery. The position information is used to guide the zone structure building, multicast tree construction, and multicast packet forwarding, which efficiently reduces the overhead for route searching and tree structure maintenance.
Keywords
Geographic Routing, Mobile Ad Hoc Networks, Multicast, Scalable.
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