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Clustering is an important research area for Mobile Ad hoc NETworks (MANETs) as it increases the capacity of network, reduces the routing overhead and makes the network more scalable in the presence of both high mobility and a large number of mobile nodes. In clustering the clusterhead manage and store recent routing information. However the frequent change of clusterhead leads to loss of routing information stored, changes the route between two nodes, affects the performance of the routing protocol and makes the cluster structure unstable. Communication overhead in terms of exchanging messages is needed to elect a new clusterhead.
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