Organizing the LDD in Mobile Environments

JeHyok RYU  MoonBae SONG  Chong-Sun HWANG  

IEICE TRANSACTIONS on Information and Systems   Vol.E86-D   No.9   pp.1504-1512
Publication Date: 2003/09/01
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Issue on Parallel and Distributed Computing, Applications and Technologies)
Category: Networking and Architectures
location dependent data,  location-based service (LBS),  location dependent query (LDQ),  mobile computing,  

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In wireless mobile environments, data requests based on the location of mobile clients (MCs) have increased. The requested data, called location-dependent data (LDD), may be uncertain if MCs use terms of general distance like "near". Fuzzy theory allows us to represent uncertainty without sharp boundaries. In this paper we quantify the fuzziness and propose a method for constructing the data region of LDD by the degree of the distance between LDDs' and MCs' locations. In simulation studies, we evaluate the LDD regions (LDRs) in various situations: MCs' extensive and intensive queried pattern in data regions of two "near" senses and civilized regions with regional features. Our performance evaluation shows that the number of database accesses in proposed LDRs can be reduced in each case.