Cooperative Data Caching and Prefetching in Wireless Ad Hoc Networks

Mieso K. Denko
2007 International Journal of Business Data Communications and Networking  
This article proposes a cooperative data caching and prefetching scheme for Mobile Ad Hoc Networks (MANETs). In this scheme, multiple hosts cooperate in both prefetching and caching commonly used data. To reduce communication and computational overhead, we use a clustering architecture for the network organization. A weak consistency based on time to live value was used to maintain data consistency. A hybrid cache replacement policy that uses frequency of access and the reference time was
more » ... ed. The effects of cache size, mobility, and prefetching threshold on the network performance were investigated in a discrete event simulation environment. The contribution of intra-cluster and inter-cluster information to overall data accessibility ratio was also investigated. The simulation results indicate that the proposed scheme improves both data accessibility and query delay at relatively lower prefetch thresholds, larger cache sizes, and moderate mobility. respectively. Dr. Denko has published in the areas of mobile ad hoc networking, integrated wired & wireless networks and wireless network security. His research interests include the design and evaluation of protocols for mobile ad hoc networks, mobile computing, hybrid wired and wireless networks, wireless ad hoc sensor networks and wireless mesh networks. Dr. Denko is a member of ACM, ACM SIGMOBILE and IEEE Communications Society and IFIP WG 6.9.
doi:10.4018/jbdcn.2007010101 fatcat:5qrv4l5hgvft5mlnn62cgcz4di