Mobile adhoc network(MANET) is penetrating our society as a future technology in our day today life. Today mobile ad-hoc network has lot of application like in disaster management, tactical network,sensor networks etc. But its implementation for commercial purposes is not an easy as compare to otherexiting wireless technologies such as cellular networks. It has many challenges or issues that offer manyproblems concerning mobility managements, shared radio medium, routing protocol and scalability. Toovercome such issues many approaches has been described. Clustering schemes are one of them in orderto manage/organize the larger network in hierarchical manner. So many clustering techniques have beendeveloped. Clustering is a scheme which divide large network into small manageable networks or group.These groups are called clusters. Clustering increases network capacity and reduces delay and the routingoverheads and make the network manageable and efficient in the presence of high mobility and largenumber of nodes. In hierarchical network every cluster has a group leader node which has manyresponsibility such as e to manage that cluster,, routing table updates, and the discovery of new routeswithin the network. The other node named as gateway node is responsible for inter clustercommunication. But the frequent change of cluster leader and gateway node leads loss of routinginformation stored, inefficient performance of routing protocols, more delays, more overheads and makes thenetwork unstable. In the proposed approach in place of cluster leader and gate way node , a new nodenamed as Cluster leader gateway(CLG) node id selected and all of the taskof cluster leader and gatewaynode is performed by the this single CLG node itself . The propose CLG approach is simulated andcompare with existing approach the help of Exata Cyber++ simulator and performs better for theparameter end to end delay,jitter,number of packets drop and link utilization.
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