V.Mallaiah et. al. / International Journal of Engineering Science and Technology Vol. 2(10), 2010, 5647-5656 MULTICAST ZONE ROUTING PROTOCOL IN WIRELESS MOBILE AD- HOC NETWORKS V.Mallaiah 1 Research Scholar, Dept. of CSE, Aacharya Nagarjuna University, Guntur, Dr.A.VinayaBabu Professor, Dept. of CSE, JNTU College of Engineering, Hyderabad, K.Madhukar Professor Nizam College, Osmania University, Hyderabad S.Nagaprasad Research Scholar, Dept. of CSE, Aacharya Nagarjuna University, Guntur, D.Marlene Grace Verghese Associate Professor in MCA Bhimavaram Institute of Engineering & Technology Pennada, West Godavari A.Sreelatha Student, Dept. of CSE, JITS College of Engineering, Karimnagar, Abstract: The use of multicasting with the network has many benefits. Multicasting reduces the communication cost for applications that sends the same data to many recipients instead of sending via multiple unicast. This paper proposes Multicast Zone Routing Protocol (MZRP) for Mobile Ad-hoc Networks (MANETs). MZRP applies on-demand procedures to dynamically establish mesh-based multicast routing zones along the path from the multicast source node to the multicast receivers. Control packet flooding is employed inside multicast zones, thus multicast overhead is vastly reduced, and good scalability can be achieved. Moreover, we also propose the Reliable Adaptive Congestion Controlled multicast (ReAct) transport layer protocol for reliable and timely multicast delivery on top of the MZRP. To recover from the different types of losses that may occur in MANETs, ReAct uses both source based and Zone local recovery mechanism. In every overlapping zone one feedback receiver is identified. Our simulation result shows that ReAct is the best performer in terms of reliability. Moreover, ReAct’s local recovery mechanism, manages to prevent the source from reducing its rate unnecessarily, thus achieving maximum throughput. Keywords: MANET, MZRP, ODMRP, RMA, and RALM. 1. Introduction A Mobile Ad-hoc NETwork (MANET) operates without any fixed infrastructure in which each node communicates with other through wireless links [1]. Because of the limited radio propagation range, routes can often be multihop. Thus, each node acts as a router to route a packet from source node to the destination. The nodes in a MANET are highly mobile, the topology changes frequently and the nodes are dynamically connected in an arbitrary manner. The rate of change depends on the velocity of the nodes. Ad hoc networks are further characterized by low bandwidth links. Because of differences in transmission capacity, some of the links may be unidirectional. ISSN: 0975-5462 5647