Minimizing Network Contention in Server-Based MANETs with Updatable Cache for Consistency

This paper proposes a server based cache consistency scheme for caching database in MANETs. The scheme stores the queries that are submitted by the requesting nodes in special nodes called query directories. The responses to the queries corresponding to query directory can be returned from nodes called caching nodes. This scheme also handles the disconnection of query directories and caching nodes from the network. The server updates the cache of each node after the network failure and hence controls the update rate at the clients. Hence the node may return to the network or else may be discarded. The average response time and traffic rate are measured in order to estimate the effectiveness of the proposed scheme. cache replication has been proposed to minimize the delay and traffic in the network. Security mechanism is incorporated to prevent malicious nodes from accessing the files in database. Ns2 simulations were performed to measure parameters like traffic rate, hit ratio and bandwidth utilization.