Multicasting in MANET for Near Real Time Systems

Abstract

A mobile ad-hoc network (MANET) is composed of mobile nodes. MANET is not having any infrastructure. Mobile nodes self-organize to form a net- work over radio links. The goal of MANETs is to extend mobility into the realm of autonomous, mobile and wireless domains, where a set of nodes form the network routing infrastructure in an ad-hoc fashion. Many Applications of MANET are in areas where rapid deployment and dynamic recon gura- tion are necessary and even wired network is not available. These includes Real Time Systems like military battle elds, emergency search, rescue sites, classrooms and conventions,where participants share information dynami- cally using their mobile devices. These applications lend themselves well to multicast operations. Multicasting can improve the e ciency of the wireless link when sending multiple copies of messages by exploiting the inherent broadcast property of wireless transmission. Hence, reliable multicast routing plays a signi - cant role in MANETs. There is a comparative study of various multicasting routing protocols. On Demand Multicast Routing Protocol(ODMRP) is well suited for near Real Time Systems. Concept of Network Coding is introduced in existing ODMRP multicast protocol. The performance mea- sures to be evaluated are the Packet Delivery Ratio, Throughput and Delay. ODMRP with Network Coding improves Packet Delivery Ratio, Through- put and Delay.