Proxy-based hybrid cache management in Mobile IP systems
Information Processing Letters
Scalability study of cache access mechanisms in multiple-cell wireless networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Journal of Parallel and Distributed Computing
Collaborative content caching algorithms in mobile ad hoc networks environment
IM'09 Proceedings of the 11th IFIP/IEEE international conference on Symposium on Integrated Network Management
Collaborative multimedia content caching algorithms for mobile ad-hoc networks
MILCOM'09 Proceedings of the 28th IEEE conference on Military communications
Journal of Parallel and Distributed Computing
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Caching frequently accessed data objects at the local buffer of a mobile user (MU) has been found to be very effective in improving information availability in mobile wireless environments. Several mechanisms have been proposed in the literature to address the challenging problem of cache consistency in cellular wireless networks. However, these mechanisms are limited to single cell systems. In this paper, we develop a novel Dynamic Scalable Asynchronous Cache Consistency Scheme (DSACCS) that can adaptively maintain mobile data objects globally or locally depending on the minimum consistency maintenance cost in multi-cell systems. The cost function is derived by taking into account each data object's update frequency, MUs' access pattern and roaming frequency, number of cells and number of MUs in the system. Extensive simulation studies demonstrate that DSACCS outperforms three existing cache strategies extended to multi-cell environments. The three cache consistency strategies are homogeneous invalidation reports (IRs), inhomogeneous IR without roaming check, and inhomogeneous IR with roaming check. Finally, an improvisation of DSACCS, called DSACCS-G, is proposed for grouping cells in order to facilitate effective cache consistency maintenance in multi-cell systems.