Spatial Index On Air

• Main Authors: ZHENG, Baihua, LEE, Wang-chien, LEE, Dik Lun
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2003
• Subjects: location-dependent queries; wireless broadcast; index structure; Hilbert Curve; Databases and Information Systems; Numerical Analysis and Scientific Computing
• Online Access: https://ink.library.smu.edu.sg/sis_research/1060; http://www.computer.org/portal/web/csdl/doi/10.1109/PERCOM.2003.1192753
• Institution: Singapore Management University

With the advent of wireless networking and personal digital devices, the population of mobile users will increase significantly. Broadcasting is particularly suitable for environments having a large number of clients. In this paper, we study the query processing of some typical location-dependent queries, such as window queries and kNN queries, in a broadcast system. To reduce clients' power consumption and provide efficient services, a transformation of the objects is applied based on Hilbert Curve. Furthermore, a linear index structure is constructed and several algorithms are devised to answer spatial queries. Experiments are conducted to evaluate the performance of the proposed transformation and related algorithms. Results show that the proposed schemes outperform existing algorithms significantly.