Efficient Cache Consistency in Server-Based MANET with Cache Replication

Abstract: This Paper proposes a cache replication scheme based on a previously proposed architecture for caching database data in MANETs. The queries that are submitted by requesting nodes in special nodes called query directories(QDs),and uses these queries to locate the data that are stored in the nodes that requested them ,called Caching Nodes(CNs). The overall design provides a complete caching system in which the server sends to the clients selective updates that adapt to their needs this reduces wireless traffic in MANET. The Replication scheme are implemented to minimize the maximum hit occurs in the nodes. In this method only one caching node is allowed to cache for a particular data and if the request rate for the particular data is high then there is more number of hits in a particular QD&CN for that data .In order to avoid this the concept of cache replication is implemented. The replicated cache cannot come under the same QD in order to avoid the network congestion in that QD. This system improves the performance of the query response rate. Average response time of node request is estimated. Moreover ns2 simulation were performed to measure parameters, like the hit ratio and average data response time

Keywords: Mobile Ad Hoc Networks, Cache Replication, cache consistency. Smart server