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Spatial Queries in Wireless Broadcast Systems

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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.

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Authors and Affiliations

  1. Singapore Management University, 469 Bukit Timah Rd, Singapore, 259756

    Baihua Zheng

  2. The Penn State University, University Park, PA, 16802, USA

    Wang-Chien Lee

  3. Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China

    Dik Lun Lee

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  1. Baihua Zheng
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  2. Wang-Chien Lee
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Zheng, B., Lee, WC. & Lee, D.L. Spatial Queries in Wireless Broadcast Systems. Wireless Networks 10, 723–736 (2004). https://doi.org/10.1023/B:WINE.0000044031.03597.97

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