Proactive caching for spatial queries in mobile environments

Haibo HU*, Jianliang XU, Wing Sing Wong, Baihua Zheng, Dik Lun Lee, Wang Chien Lee

*Corresponding author for this work

Research output: Chapter in book/report/conference proceedingConference proceedingpeer-review

47 Citations (Scopus)


Semantic caching enables mobile clients to answer spatial queries locally by storing the query descriptions together with the results. However, it supports only a limited number of query types, and sharing results among these types is difficult. To address these issues, we propose a proactive caching model which caches the result objects as well as the index that supports these objects as the results. The cached index enables the objects to be reused for all common types of queries. We also propose an adaptive scheme to cache such an index, which further optimizes the query response time for the best user experience. Simulation results show that proactive caching achieves a significant performance gain over page caching and semantic caching in mobile environments where wireless bandwidth and battery are precious resources.

Original languageEnglish
Title of host publicationProceedings - 21st International Conference on Data Engineering, ICDE 2005
Number of pages12
Publication statusPublished - 2005
Event21st International Conference on Data Engineering, ICDE 2005 - Tokyo, Japan
Duration: 5 Apr 20058 Apr 2005

Publication series

NameProceedings - International Conference on Data Engineering
ISSN (Print)1084-4627


Conference21st International Conference on Data Engineering, ICDE 2005
Internet address

Scopus Subject Areas

  • Software
  • Signal Processing
  • Information Systems


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