1 of 7 A Fuzzy Mobile Node Cache Replacement Policy for Cooperative Cache Management in MANETs K. Muralidhar 1 and Dr. N. Geethanjali 2 1 Assistant Professor, Department of CSE, Ananthalakshmi Institute of Technology & Sciences, JNTUA University, Anantapur, India muralidhar.kurni@gmail.com 2 Associate Professor & Head, Department of CST, S.K. University, Anantapur, India geethanjali.sku@gmail.com Corresponding author: muralidhar.kurni@gmail.com ABSTRACT In the recent years there has been a rapid growth in mobile communications. Mobile Adhoc Networks (MANETs) are very popular solution in the situation where network infrastructure is not available. As there is no infrastructure support, mobile nodes cooperate with each other to forward data. Each node acts as a router, forwarding data packets for other nodes and mobile nodes have peer to peer connection among themselves. However, MANETs are limited by intermittent network connections, restricted power supplies, and limited computing and storage resources. Here we assume that each mobile node has limited cache space and only some data items can be cached. When the cache space of a node is full then the node will select some data items to remove from the cache, when it has to cache the new one. As in cooperative caching in MANETs the data is not stored only on behalf of caching node but interest of the neighbor’s node is also considered. For this reason LRU, LFU and SXO are not suitable for the MANETs. Here our emphasis is to remove such data items whose removals introduce the least effect on the requirement of the neighbor’s node, the data availability in the zone and also the node’s cache space. Hence in this paper we propose a Fuzzy approach to cache replacement policy in mobile nodes. Keywords: MANETs, limited storage, cache space, cooperative caching, fuzzy approach, cache replacement policy. I. INTRODUCTION Mobile Ad-hoc networks (MANETs) provide an attractive solution for networking in the situations where network infrastructure or service subscription is not available. Mobile ad hoc networks (MANETs) are formed with mobile nodes (MNs) such as notebook, PDA, or cell phone and so on. Mobile Adhoc Networks are very popular solution in the situation where network infrastructure is not available. This type of network can communicate with external networks such as Internet through a gateway. However, MANETs are limited by intermittent network connections, restricted power supplies, and limited computing and storage resources. These restrictions raise several new challenges for data access applications with the respects of data availability and access efficiency. In adhoc networks, due to frequent network partition, data availability is lower than that in traditional wired networks. Cooperative caching provides an attractive solution for this problem. Cooperative caching is a technique that allows the sharing and coordination among the mobile nodes. In a MANET, if the MNs cache some frequently requested data, the cached data can be served for others later. The requester needs not to retrieve the data from the remote server (data source) and then requests the data from the caching node. As a result, the data accessibility is enhanced. Furthermore, cooperative caching techniques allow several caching nodes to coordinate the caching tasks such as the redirection of data requests, cache placement, or cache replacement.