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. Due to this network topology and number of neighboring nodes in each node frequently change. Movement of nodes from one to another network also affect to the communication between them. As the number of nodes increases 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 Head Gateway (CHG) [1]. Ad hoc wireless network is a dynamic multi-hop network, which is established by a group of mobile nodes on a shared wireless channel. The shared medium and the multi-hop nature of the wireless ad hoc networks pose fundamental challenges to the design of an effective resource allocation algorithm 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. The centralized Cluster Head Gateway can become a bottleneck and possibly cause a lower connectivity for the clustering system. In this paper we propose a mechanism in which communication outside the cluster is distributed through separate Cluster Head Gateways with appropriate routing protocols. Here considering are AODV, DSR, OLSR and TORA routing protocols. We are comparing protocols behaviour on the basis of following parameters: delay, throughput, traffic sent, traffic received, data dropped and network load and then check who is giving better performance. Finally, this paper conducts simulation experiments in the conditions where we are using Multiple CHG to the nodes within a network.