Trust Value Updation Algorithm for Multicast Routing Algorithm for Cluster Based MANET

In a cluster based routing algorithm for mobile ad hoc network cluster head plays a very important role in communication between clusters. Selection of cluster head plays a very vital role. But if the selected cluster head node itself becomes selfish or malicious node, it will affect the performance of the entire cluster communication and hence hampers the throughput and efficiency of the MANET. Trust has to be established for the all the nodes in the cluster. Hence trust management plays a very important role. Clusters are formed based on 1-Hop distance. Within the clusters trust value of all the nodes are calculated using challenge evaluation algorithm to identify malicious node and selfish node. With the help of Rating friend's algorithm a node rates its nearest neighbors so as to make the network more robust in terms of reliability and gather data about each other to populate a friends list. Later trust value is calculated for each node depending upon the above mentioned algorithms and stored in friend list. Node with a highest trust value will be considered for cluster head selection. Then considering the bandwidth, power and connectivity of the node cluster head is selected. In this paper we are proposing Trust value updation algorithm for cluster head were trust value has to be updated or refreshed for a time interval so as to select the new cluster head as the nodes are continuously moving. The effectiveness of this proposed algorithm in comparison with Power Aware On-demand Multicast Routing (PAOMR) algorithms is evaluated through simulation. The proposed in comparison to previous technique alleviates the energy consumption and provides reduced delay.