Search continuous nearest neighbors on the air

Baihua Zheng, Wang Chien Lee, Dik Lun Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

25 Scopus citations

Abstract

A continuous nearest neighbor (CNN) search retrieves the nearest neighbors corresponding to every point in a given query line segment. It is important for location-based services such as vehicular navigation tools and tourist guides. It is infeasible to answer a CNN search by issuing a traditional nearest neighbor query at every point of the line segment due to the large number of queries generated and the large overhead on bandwidth. Algorithms have been proposed recently to support CNN search in the traditional client-server service model. In this paper, we conduct a pioneering study on CNN search in wireless data broadcast environments. We propose two air indexing techniques, namely, R-tree air index and Hubert Curve air index, and develop algorithms based on these two techniques to search CNNs on the air. A simulation is conducted to compare the proposed air indexing techniques with a naive broadcast approach. The result shows that both of the proposed methods outperform the naive approach significantly. The Hilbert Curve air index is superior for uniform data distributions, while the R-tree air index is a better choice for skewed data distributions.

Original languageEnglish (US)
Title of host publicationProceedings of MOBIQUITOUS 2004 - 1st Annual International Conference on Mobile and Ubiquitous Systems
Subtitle of host publicationNetworking and Services
Pages236-245
Number of pages10
StatePublished - Dec 1 2004
EventProceedings of MOBIQUITOUS 2004 - 1st Annual International Conference on Mobile and Ubiquitous Systems: Networking and Services - Boston, MA, United States
Duration: Aug 22 2004Aug 26 2004

Publication series

NameProceedings of MOBIQUITOUS 2004 - 1st Annual International Conference on Mobile and Ubiquitous Systems: Networking and Services

Other

OtherProceedings of MOBIQUITOUS 2004 - 1st Annual International Conference on Mobile and Ubiquitous Systems: Networking and Services
CountryUnited States
CityBoston, MA
Period8/22/048/26/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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