Cluster Based Data Replication Technique Based on Mobility Prediction in Mobile Ad Hoc Networks

The mobile database system in a MANET is a dynamic distributed database system, which is composed of some mobile MHs. The key issues in MANETs for mobile database are: How to optimize mobile queries, cache and replicate data, manage transactions and routing. In this proposal, we wish to take the problems of data replication in solving the mobile database issues. Replication of data in a MANET environment focuses on to improve reliability and availability of data to the mobile clients (node). There are many issues revolving around replication of data in such a scenario like power, server and node mobility, networking partition and frequent disconnection. We propose a cluster based data replication technique for replication of data and to overcome the issues related to node mobility or disconnection problem in MANET environment. Our approach has two phases; initial phase consists of formation of cluster and cluster head and in the second phase, the distributions of data (replicated data) to the respective cluster head. By NS2 simulation, we will show that our proposed technique attains better data consistency and accuracy with reduced delay and overhead.