Research on gateway-aided overhead-restricted cluster routing protocol for MANET

As for the current cluster-based routing protocols for MANET,some problems exist such as the overloaded cluster-head,and the flooded entire network even chain reaction while two clusters are merging.To solve these problems,a Gateway-aided Overhead-restricted cluster Routing Protocol(GORP) for MANET was proposed.In GORP,gateways share part of the work of cluster-heads for maintaining routing and transmitting data.In this way,the burden of cluster-heads was reduced and cluster-heads were no longer the bottleneck of the network.When the merging of clusters occurs,which is caused by the moving of a cluster-head to the range of another cluster-head,the moving cluster-head should be set as an ordinary node,and the original still cluster-head as the cluster-head of the new cluster.Thus,the stability of cluster could be kept to the most extent.Simulation results show that GORP can work well for MANET with different nodal mobility,nodal density and network scale.Cluster-based routing security in MANET can also benefit from the stable structure of cluster.