CS cache engine: data access accelerator for location-based service in mobile environments

ABSTRACT

Location-based services (LBS) have emerged as one of the killer applications for mobile and pervasive computing environments. Due to limited bandwidth and scarce client resources, client-side data caching plays an important role of enhancing the data availability and improving the response time. In this demonstration, we present CS Cache Engine suitable for LBS. The underlying caching model is Complementary Space Caching (CS caching) scheme that we have recently presented in [citation]. Different from conventional data caching schemes, CS caching preserves a global view of the database by maintaining physical objects and capturing those objects in the server but not in the cache as Complementary Regions (CRs) in the cache. As a result, with the CS Cache Engine implementing CS caching, client assertiveness on their own answered queries is enhanced so that unnecessary requests over the wireless channel can be avoided; various kinds of location-based queries are naturally supported; and the client's ability to prefetch objects is introduced such that the response time can be further improved. In this demonstration paper, we discuss the architecture and the functionality of the CS Caching Engine that adopts CS caching. Specifically, for this demonstration, a tourist information named TravelGuide is prototyped with the support of this cache engine.

REFERENCES

• 1: Norbert Beckmann , Hans-Peter Kriegel , Ralf Schneider , Bernhard Seeger, The R*-tree: an efficient and robust access method for points and rectangles, Proceedings of the 1990 ACM SIGMOD international conference on Management of data, p.322-331, May 23-26, 1990, Atlantic City, New Jersey, United States
• 2: Shaul Dar , Michael J. Franklin , Björn Þór Jónsson , Divesh Srivastava , Michael Tan, Semantic Data Caching and Replacement, Proceedings of the 22th International Conference on Very Large Data Bases, p.330-341, September 03-06, 1996
• 3: [3] K. C. Lee, W.-C. Lee, B. Zheng, and J. Xu. Caching Complementary Space for Location-Based Services. In Proceedings of the 10th International Conference on Extending Database Technology (EDBT), Munich, Germany, Mar 26-31, pages 1020-1038, 2006.
• 4: Qun Ren , Margaret H. Dunham, Using semantic caching to manage location dependent data in mobile computing, Proceedings of the 6th annual international conference on Mobile computing and networking, p.210-221, August 06-11, 2000, Boston, Massachusetts, United States [doi>10.1145/345910.345948]

INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.4 Distributed Systems

Additional Classification:
  H. Information Systems
  H.2 DATABASE MANAGEMENT
      H.2.4 Systems
          Subjects: Distributed databases
  H.3 INFORMATION STORAGE AND RETRIEVAL
      H.3.2 Information Storage

General Terms:
Design, Management