An Efficient Processing of Continuous Range Queries on High-Dimensional Spatial Data

고차원 공간 데이터를 위한 연속 범위 질의의 효율적인 처리

  • 장수민 (충북대학교 정보통신공학과) ;
  • 유재수 (충북대학교 정보통신공학과)
  • Published : 2007.11.15

Abstract

Recent applications on continuous queries on moving objects are extended quickly to various parts. These applications need not only 2-dimensional space data but also high-dimensional space data. If we use previous index for overlapped continuous range queries on high-dimensional space data, as the number of continuous range queries on a large number of moving objects becomes larger, their performance degrades significantly. We focus on stationary queries, non-exponential increase of storage cost and efficient processing time for large data sets. In this paper, to solve these problems, we present a novel query indexing method, denoted as PAB(Projected Attribute Bit)-based query index. We transfer information of high-dimensional continuous range query on each axis into one-dimensional bit lists by projecting technique. Also proposed query index supports incremental update for efficient query processing. Through various experiments, we show that our method outperforms the CES(containment-encoded squares)-based indexing method which is one of the most recent research.

이동객체에 대한 연속 범위 질의(Continuous Range Query)의 응용프로그램이 급속도로 확장되면서 이차원정보를 넘어서 고차원 공간 데이타에 대한 처리를 요구하고 있다. 만약 고차원 데이타에 대한 중첩되어지는 연속 범위 질의의 정보를 기존의 색인으로 구성한다면 객체의 수와 질의의 수가 증가함에 따라 질의처리성능이 저하된다. 본 논문은 이러한 문제점을 해결하기 위하여 PAB(Projected Attribute Bit)-기반의 질의색인방법을 제안한다. 제안하는 기법은 성능향상을 위하여 질의의 정보를 각 속성 축에 투영이라는 작업을 통하여 고차원의 데이타를 1차원 정보들로 변환하고 이러한 정보를 비트단위로 구성하였다. 또한 제안하는 질의색인은 보다 효율적인 질의의 처리를 위하여 점진적인 갱신(Incremental Update)을 지원한다. 다양한 성능평가 및 분석을 통하여 제안하는 방법이 최근에 연구된 CES-기반의 질의색인 기법보다 더 나은 확장성(Scalability)을 가짐을 입증한다.

Keywords

References

  1. S. Prabhakar, Y. Xia, D. V. Kalashnikov, W. G. Aref, and S. E. Hambrusch, Query Indexing and Velocity Constrained Indexing: Scalable Techniques for Continuous Queries on Moving Objects. In IEEE Trans. Computers, Vol.51, No.10, pp. 1124-1140, Oct. 2002 https://doi.org/10.1109/TC.2002.1039840
  2. K.-L.Wu, S.-K Chen, and P.S. Yu, Efficient Processing of Continual Range Queries for Location-Aware Mobile Services. In Information Systems Frontiers, Vol.7, Nos.4-5, pp. 435-448, Dec. 2005 https://doi.org/10.1007/s10796-005-4813-5
  3. K.-L.Wu, S.-K Chen, and P.S. Yu, Processing continual range queries over moving objects using VCR-based query indexes. In Proceedings of IEEE Int'l Conf on Mobile and Ubiquitous Systems: Networking and Services, pp. 226-235, Aug. 2004
  4. K.-L. Wu, S.-K Chen, and P.S. Yu, Shingle-Based Query Indexing for Location-Based Mobile E-Commerce. In Proceedings of IEEE Int'l Conf. E-Commerce, July. pp. 16-23, 2004
  5. D. V. Kalashnikov, S. Prabhakar, W. G. Aref, and S. E. Hambrusch, Efficient Evaluation of Continuous Range Queries on Moving Objects. In Proceedings of Int'l Conf. Database and Expert Systems Applications, Vol. 2453/2002, pp. 25-64, 2002
  6. B. Gedik, K.-L. Wu, P.S. Yu, and L. Liu, Processing Moving Queries over Moving Objects using Motion-Adaptive Indexes. In IEEE Trans. Knowledge and Data Eng, Vol.18, pp. 651-668, May 2006 https://doi.org/10.1109/TKDE.2006.81
  7. B. Gedik and L. Liu, MobiEyes: Distributed Processing of Continuously Moving Queries on Moving Objects in a Mobile System. In Proceedings of Int'l Conf. Extending Database Technology, 2004
  8. M.F. Mokbel, X. Xiong, and W. G. Aref, SINA: Scalable Incremental Processing of Continuous Queries in Spatio-Temporal Databases. In Proceedings of ACM SIGMOD Int'l Conf. Management of Data, 2004
  9. K.-L. Wu, S.-K Chen, and P.S. Yu, Incremental Processing of Continual Range Queries over Moving Objects. In IEEE Trans. Knowledge and Data Eng, Vol.18, pp. 1560-1575, Nov. 2006 https://doi.org/10.1109/TKDE.2006.176
  10. A. Guttman, R-Trees: A Dynamic Index Structure for Spatial Searching. In Proceedings of ACM SIGMOD Int'l Conf, Management of Data, pp. 47-57, 1984