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Optimized Clustering Mechanism for Qos Aware Route Discovery in Manet

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Cooperative communication, which utilizes nearby terminals to relay the overhearing information to achieve the diversity gains, has a great potential to improve the transmitting efficiency in wireless networks. With high-power nodes, MANETs can improve network scalability through load balanced technique, dynamic channel selection, and broadcasting robustness. However, the delay and throughput of power heterogeneous MANETs can be severely impacted by high-power nodes. To deal with the complicated routing access interactions induced by relaying and leverage the benefits of such cooperation, an efficient Cooperative Optimized Clustering Routing Protocol (COCRP) is needed. To reduce the interference raised by high-power nodes, routing protocol COCRP is developed to avoid packet forwarding via high-power nodes. The COCRP is composed of two parts: first one is additional coverage ratio, which is the ratio of the number of nodes that should be covered by a single broadcast Cluster Head to the total number of neighbours; and second one is connectivity factor, which reflects the relationship of network connectivity and the number of neighbours of a given node. This approach combines the advantages of the neighbour coverage knowledge and the probabilistic mechanism, which can significantly decrease the number of retransmissions so as to improve the delay and throughput, and can also improve the routing performance.
Keywords:Dynamic Channel Allocation,COCRP,Cluster Head,performance. Quality of Service,Load Balancing,


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