In this paper, we proposed a novel Efficient Geographic Multicast Protocol (EGMP). A network wide zone-based bidirectional tree is used to achieve efficient membership management and multicast delivery. In Efficient EGMP an efficient distributed algorithm is used, that support dynamic changes to the multicast group during tree building and allows overlapping join/leave operations. | ISSN:2249-5789 S Firthouse et al, International Journal of Computer Science & Communication Networks,Vol 2(1), 65-73 A Supporting Efficient and Dynamic Multicasting Over Multiple Regions in Mobile Ad Hoc Networks , Department of , PSNA College of Engg. & Tech., Dindigul. Abstract Designing multicast routing protocol is a big challenge due to difficulty in achieving group membership management, packet forwarding and maintenance of multicast structure over the dynamic network topology. In this paper, we proposed a novel Efficient Geographic Multicast Protocol (EGMP). A network wide zone-based bidirectional tree is used to achieve efficient membership management and multicast delivery. In Efficient EGMP an efficient distributed algorithm is used, that support dynamic changes to the multicast group during tree building and allows overlapping join/leave operations. The multicast tree is constructed based on zone depth, which is efficient in guiding tree branch building and tree structure maintenance. Nodes in the network selforganized into zones and zone-based bidirectionaltree-based distribution paths are built. Our simulation results demonstrate that EGMP has high packet delivery ratio, low control overhead and multicast group joining delay under all test scenarios, and is scalable to both group size and network size. 1. Introduction A Given the increasing demand for flexibility as well as technological advances in mobile communication devices such as wireless LANs, laptop computers and smart phones, wireless communications are becoming more and more common. There are several advanced efforts to enable wireless communication over mobile networks. Multicasting is one such effort that strives to provide support for wireless communication in mobile networks. Mobile AdHoc Network (MANET) is a group of wireless mobility nodes which is self organized into a network without the need of any infrastructure. It is a big .
