Tracking nearest surrounders in moving object environments

Ken C.K. Lee, Josh Schiffman, Baihua Zheng, Wang Chien Lee, Hong Va Leong

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

12 Scopus citations


This paper presents a system framework to support continuous nearest surrounder (NS) queries in moving object environments. NS query finds the nearest objects at individual distinct angles from a query point. This query distinguishes itself from other conventional spatial queries such as range queries and nearest neighbor queries by considering both distance and angular aspects of objects with respect to a query point. One of NS query applications is to monitor the nearest objects around an observation point. In our framework, a centralized server is dedicated to collect object location updates, to determine affected NS queries of each object location update, to compute the incremental result change of affected queries and to deliver result updates to corresponding interested users/applications that initiate the queries. In particular, we propose algorithms namely, safe region formation and partial query evaluation, that can significantly improve the system performance. Through simulations, we validate our proposed algorithms over a wide range of settings.

Original languageEnglish (US)
Title of host publicationProceedings for ICPS:2006 International Conference on Pervasive Services
Number of pages10
StatePublished - 2006
EventICPS:2006 International Conference on Pervasive Services - Lyon, France
Duration: Jun 26 2006Jun 29 2006

Publication series

NameProceedings for ICPS:2006 International Conference on Pervasive Services


OtherICPS:2006 International Conference on Pervasive Services

All Science Journal Classification (ASJC) codes

  • General Engineering


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