DocumentCode :
884995
Title :
Dynamic cache consistency schemes for wireless cellular networks
Author :
Wang, Zhijun ; Kumar, Mohan ; Das, Sajal K. ; Shen, Huaping
Author_Institution :
Dept. of Comput., Hong Kong Polytech. Univ., China
Volume :
5
Issue :
2
fYear :
2006
Firstpage :
366
Lastpage :
376
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.
Keywords :
buffer circuits; cache storage; cellular radio; access pattern; cost function; dynamic scalable asynchronous cache consistency scheme; homogeneous invalidation reports; local buffer; mobile data; mobile user; multicell systems; wireless cellular networks; Cellular networks; Computer science; Cost function; Databases; Electronic mail; Frequency; Land mobile radio cellular systems; Maintenance engineering; Roaming; Wireless networks;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2006.1611060
Filename :
1611060
Link To Document :
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