Shingle-based query indexing for location-based mobile e-commerce

Author

Wu, Kun-Lung ; Chen, Shyh-Kwei ; Yu, Philip S.

Author_Institution

IBM Thomas J. Watson Res. Center, Hawthorne, NY, USA

fYear

2004

fDate

6-9 July 2004

Firstpage

16

Lastpage

23

Abstract

We present a shingle-based query index (SQI) for supporting location-based services in mobile e-commerce. SQI is used to efficiently identify moving objects that are currently located inside a geographical region. A set of virtual shingles is predefined, each with a unique ID. One or more shingles are used to cover the geographical region defined by a range query, where the covering shingles may overlap with one another. SQI maintains a direct mapping from individual shingles to the range queries that contain them. The use of covering shingles has two important properties. First, it does not impose any limit on the object moving speed or direction. Second, it allows the revaluation of continual range queries to capitalize on the incremental changes in object locations. Simulations are conducted to evaluate the effectiveness of SQI and compare it with a cell-based approach.

Keywords

database indexing; electronic commerce; mobile computing; query processing; cell-based approach; direct mapping; geographical region; location-based e-commerce; location-based services; mobile e-commerce; object location; range query; shingle-based query index; virtual shingles; Business; Cellular phones; Computational modeling; Global Positioning System; Humans; Indexing; Internet; Mobile computing; Personal digital assistants; Portable computers;

fLanguage

English

Publisher

ieee

Conference_Titel

e-Commerce Technology, 2004. CEC 2004. Proceedings. IEEE International Conference on

Print_ISBN

0-7695-2098-7

Type

conf

DOI

10.1109/ICECT.2004.1319713

Filename

1319713