Shortest Path Multicast Tree Construction Algorithm to Transmit Multimedia Real Time Traffic in MANETS

Mobile ad hoc network is a self-configuring, self organizing and decentralized network. It is connected by wireless links. Each device in a MANET is free to move independently in any direction. Hence it can change its links to other devices frequently. It is a collection of mobile wireless nodes that can dynamically form a network without using any pre-existing infrastructure. Due to characteristics like temporary topology and absence of centralized authority, routing is one of the major issues in ad hoc networks. Because of connectivity richness in mobile ad hoc networks, there often exist multiple paths between a source and a destination. Since many applications require uninterrupted connectivity of a session, the ability to find long-living paths can be very useful. However, MANETs does not seem to effectively support live video transmission and multimedia applications. The main objective of our work is to improve the performance. . In mobile ad hoc networks (MANET), during real time traffic multicasting, there is increased energy consumption and delay. Hence in mobile ad hoc network (MANET) cluster head selection is considered a gigantic challenge. An efficient ENB cluster head selection algorithm [1] based on the combination of important matrices Residual Energy (E), Node connectivity (C) and Available Bandwidth (B) is used for selection of the cluster head efficiently in Mobile ad hoc networks. The multimedia traffic stream is split into multiple sub-streams prior to transmission using Top-N rule selection approach algorithm [2]. In this paper we are proposing a shortest path multicast tree construction algorithm to transmit the real time traffic effectively among the nodes in MANETS. Using the cluster head as group leaders and cluster members as leaf nodes, a shortest path multicast tree is established. This helps in transmitting multimedia real time traffic to different receivers. This algorithm works very well in Energy and Bandwidth Aware Clustering Algorithm for Real-time Traffic Multicasting in Mobile Ad Hoc Networks.