Publication Type

Journal Article

Version

acceptedVersion

Publication Date

11-2004

Abstract

Owing to the advent of wireless networking and personal digital devices, information systems in the era of mobile computing are expected to be able to handle a tremendous amount of traffic and service requests from the users. Wireless data broadcast, thanks to its high scalability, is particularly suitable for meeting such a challenge. Indexing techniques have been developed for wireless data broadcast systems in order to conserve the scarce power resources in mobile clients. However, most of the previous studies do not take into account the impact of location information of users. In this paper, we address the issues of supporting spatial queries (including window queries and kNN queries) of location-dependent information via wireless data broadcast. A linear index structure based on the Hilbert curve and corresponding search algorithms are proposed to answer spatial queries on air. Experiments are conducted to evaluate the performance of the proposed indexing technique. Results show that the proposed index and its enhancement outperform existing algorithms significantly.

Keywords

location-dependent spatial queries, wireless broadcast, index structure, pervasive computing

Discipline

Databases and Information Systems | Numerical Analysis and Scientific Computing

Publication

Wireless Networks

Volume

10

Issue

6

First Page

723

Last Page

736

ISSN

1022-0038

Identifier

10.1023/B:WINE.0000044031.03597.97

Publisher

Springer Verlag

Additional URL

http://dx.doi.org/10.1023/B:WINE.0000044031.03597.97

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