Sunitha, V.; Naik, N. Venkatesh
December 2012
Asian Journal of Computer Science & Information Technology;Dec2012, Vol. 2 Issue 12, p348
Academic Journal
Group communications are important in Mobile Ad hoc Networks (MANET). Multicast is an efficient method for implementing group communications. A network-wide zone-based bi-directional 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. Several strategies have been proposed to further improve the efficiency of the protocol, for example, introducing the concept of zone depth for building an optimal tree structure and integrating the location search of group members with the hierarchical group membership management. Finally, we design a scheme to handle empty zone problem faced by most routing protocols using a zone structure .EGMP has significantly lower control overhead, data transmission overhead, and multicast group joining delay


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