Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8331
Title: Dynamic cache consistency schemes for wireless cellular networks
Authors: Wang, ZJ
Kumar, M
Das, SK
Shen, HP
Keywords: Cache consistency
Invalidation reports
Mobility
Mobile wireless networks
Issue Date: 2006
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on wireless communications, 2006, v. 5, no. 2, p. 366-376 How to cite?
Journal: IEEE transactions on wireless communications 
Abstract: 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.
URI: http://hdl.handle.net/10397/8331
ISSN: 1536-1276
DOI: 10.1109/TWC.2006.02016
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