Improving Data Availability in Ad Hoc Wireless Networks

  • Luciano Bertini
  • Orlando Loques
  • J. C. B. Leite
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4113)


This paper presents a data replication approach for ad hoc wireless networks which aims to improve data availability. Besides, the number of replications is minimized, helping to reduce energy consumption and, thus, the application lifetime. A mobile node replicates its data either when its energy is in a weak level or when it is in the imminence of loosing connection. For replica allocation, the Bayesian decision theory is used, but with fuzzy states modeling and fuzzy observations made on the system. The proposed approach presents features that make it suitable to be used in a mobile computing environment.


Mobile Node Data Unit Data Replication Node Speed Fuzzy Event 
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  1. 1.
    Malika, B., Valérie, I.: A Middleware Service for Mobile Ad Hoc Data Sharing, Enhancing Data Availability. In: ACM/IFIP/USENIX International Middleware Conference, Rio de Janeiro, Brazil, pp. 493–511 (2003)Google Scholar
  2. 2.
    David, R., Peter, R., Gerald, J., Popek, G.H.: Kuenning: Replication Requirements in Mobile Environments. Mobile Networks and Applications 6, 525–533 (2001)MATHCrossRefGoogle Scholar
  3. 3.
    Takahiro, H.: Replica Allocation Methods in Ad Hoc Networks with Data Update. Mobile Networks and Applications 8, 343–354 (2003)CrossRefGoogle Scholar
  4. 4.
    AndréM, B., Leite, J.C.B.: Orlando Loques: Treating Uncertainty in Distributed Scheduling. Journal of Systems and Software 63, 129–136 (2002)CrossRefGoogle Scholar
  5. 5.
    Timothy, J.R.: Fuzzy Logic With Engineering Applications. McGraw Hill, New York (1995)MATHGoogle Scholar
  6. 6.
    NS-2. The Network Simulator - Ns-2 (2004),
  7. 7.
    Guimarães, M.: Fault-tolerance and Economy of Resources in a Disaster Mitigation System (in portuguese). Instituto De Computação, Universidade Federal Fluminense, Niterói, RJ, Brazil (2006)Google Scholar
  8. 8.
    Huang, J.L., Chen, M.S., Peng, W.C.: Exploring Group Mobility for Replica Data Allocation in A Mobile Environment. In: International Conference on Information and Knowledge Management, New Orleans, LA, USA, pp. 161–168 (2003)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Luciano Bertini
    • 1
  • Orlando Loques
    • 1
  • J. C. B. Leite
    • 1
  1. 1.Instituto de ComputaçãoUniversidade Federal FluminenseNiteróiBrazil

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