ROUTING PROTOCOL BEHAVIOUR WITH MULTIPLE CLUSTER HEAD GATEWAY IN MOBILE AD HOC NETWORK

As we know in Mobile Ad hoc network our Nodes are highly mobile. They move around the Network. Dueto this network topology and number of neighboring nodes in each node frequently change. Movement ofnodes from one to another network also affect to the communication between them. As the number of nodesincreases complexity of MANET increases in various issues. Nodes within the cluster communicate directly.However, nodes communicate outside the cluster through a centralized node that is called a Cluster HeadGateway (CHG) [1]. Ad hoc wireless network is a dynamic multi-hop network, which is established by agroup of mobile nodes on a shared wireless channel. The shared medium and the multi-hop nature of thewireless ad hoc networks pose fundamental challenges to the design of an effective resource allocationalgorithm to maximize the aggregated utility of flows, maintaining basic fairness among the multiple flows.An elected Cluster Head Gateway (CHG) is assigned for communication with all other clusters. Thecentralized Cluster Head Gateway can become a bottleneck and possibly cause a lower connectivity for theclustering system. In this paper we propose a mechanism in which communication outside the cluster isdistributed through separate Cluster Head Gateways with appropriate routing protocols. Here consideringare AODV, DSR, OLSR and TORA routing protocols. We are comparing protocols behaviour on the basisof following parameters: delay, throughput, traffic sent, traffic received, data dropped and network loadand then check who is giving better performance. Finally, this paper conducts simulation experiments inthe conditions where we are using Multiple CHG to the nodes within a network.