Caching complementary space for location-based services

Ken C.K. Lee*, Wang Chien Lee, Baihua Zheng, Jianliang XU

*Corresponding author for this work

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

10 Citations (Scopus)


In this paper, we propose a novel client-side, multi-granularity caching scheme, called "Complementary Space Caching" (CS caching), for location-based services in mobile environments. Different from conventional data caching schemes that only cache a portion of dataset, CS caching maintains a global view of the whole dataset. Different portions of this view are cached in varied granularity based on the probabilities of being accessed in the future queries. The data objects with very high access probabilities are cached in the finest granularity, i.e., the data objects themselves. The data objects which are less likely to be accessed in the near future are abstracted and logically cached in the form of complementary regions (CRs) in a coarse granularity. CS caching naturally supports all types of location-based queries. In this paper, we explore several design and system issues of CS caching, including cache memory allocation between objects and CRs, and CR coalescence. We develop algorithms for location-based queries and a cache replacement mechanism. Through an extensive performance evaluation, we show that CS caching is superior to existing caching schemes for location-based services.

Original languageEnglish
Title of host publicationAdvances in Database Technology - EDBT 2006 - 10th International Conference on Extending Database Technology, Proceedings
PublisherSpringer Verlag
Number of pages19
ISBN (Print)3540329609, 9783540329602
Publication statusPublished - 2006
Event10th International Conference on Extending Database Technology, EDBT 2006 - Munich, Germany
Duration: 26 Mar 200631 Mar 2006

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume3896 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference10th International Conference on Extending Database Technology, EDBT 2006

Scopus Subject Areas

  • Theoretical Computer Science
  • Computer Science(all)


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