期刊名称：International Journal of Computer Science and Information Technologies
电子版ISSN：0975-9646
出版年度：2012
卷号：3
期号：2
页码：3498-3502
出版社：TechScience Publications
摘要：Difficulty in group membership management and multicast packet forwarding over dynamic topologies like Mobile Ad hoc Networks (MANET) prompted for alternative protocols and techniques. Earlier Efficient Geographic Multicast Protocol (EGMP) that uses a virtual-zone-based structure where a network-wide zonebased bi-directional tree is constructed to implement scalable and efficient group membership management was introduced. The position information of each node is used to guide the zone structure development, tree construction and packet forwarding in multicast environment, Even though this method efficiently reduces the control overhead, data transmission overhead, and multicast group joining delays, it introduces new anomalies especially when applied for use with smaller distributed groups, where it may become even less efficient and more expensive to function in MANETs due to changing network dynamics, bandwidth constraints, and high channel access cost. We propose to use a Modified Efficient Geographic Multicast Protocol (MEGMP) that uses concept of zone depth, which is efficient in guiding the tree branch building and tree structure maintenance, especially during node mobility. Nodes self-organizing into zones, zone-based bidirectional-tree-based distribution paths can be built quickly for efficient multicast packet forwarding. The scalability and the efficiency of MEGMP are evaluated through simulations and quantitative analysis.
关键词：Geographic Routing; Mobile Ad Hoc Networks;Multicasting; Protocol.
