Abstract—This paper addresses the problem of efficient cache replacement for maintaining cache consistency in wireless networks by considering the network environment with a server and other nodes for accessing information stored at the server. To minimize access latency in a wireless communication network, caching the server information at some of the client nodes across the network is an effective strategy. Caching may incur extra overhead cost and also disseminating information incorporates intake of additional energy and increased bandwidth. But the wireless systems are constrained by scarce bandwidth and limited energy. Thus the caching strategies are designed optimally by considering the trade-off between overhead cost and access latency. We propose a replacement policy for cache objects that uses a heuristic approach based on different parameters that improve caching performance. In this paper, we show that the on demand broadcasts can be minimized when multicasting is used. All the clients implement the Heuristic Cache Replacement Policy that is based on the frequency of the location affinity of the user along with several other factors such as the variable data object size, temporal data updates, limited client resources, scarce wireless bandwidth and mobility of the node. Finally we prove through the experimental investigation that multicast strategy for data dissemination to maintain cache consistency in location-dependent mobile environment performs better than broadcast approach.

Index Terms—Broadcast Data Dissemination (BDD),Dynamic Transmitting Agent (DTA), Protocol Independent Multicasting (PIM), Multicast Data Dissemination (MDD),Cache Replacement Policy (CRP).

Kahkashan Tabassum, Associate Professor, CSED, Muffakham Jah College of Engineering & Technology Banjara Hills, Hyderabad -500155,India (email:kahkashan@mjcollege.ac.in)
Dr. A. Damodaram, Professor, CSED, Jawaharlal Nehru Technological University, Kukatpally, Hyderabad - 500 085,India(email:adamodaram@jntuh.ac.in)

Cite: Kahkashan Tabassum and Dr. A. Damodaram, "Using Multicast Data Dissemination to maintain Cache Consistency in Location-dependent Mobile Environment," International Journal of Computer and Electrical Engineering vol. 3, no. 1, pp. 120-129, 2011.