An Analytical Study of Broadcast Based Cache Invalidation in Mobile Computing Networks

  • Kwong Yuen Lai
  • Zahir Tari
  • Peter Bertok
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2888)


Maintaining client cache consistency is a difficult problem in large scale mobile computing systems due to limitations in bandwidth and client resources. Broadcast-based cache invalidation techniques can help coordinate clients and servers in such systems to ensure cache consistency. However, most performance analysis of existing invalidation techniques were carried out through simulation. In this paper we present analytical models of a number of existing cache invalidation schemes to facilitate comparison and provide a basis for future investigation into broadcast based cache invalidation techniques. In addition, we propose two new techniques to reduce the overhead of cache invalidation. The first technique improves downlink channel utilisation by reducing the size of invalidation reports. The second technique lowers uplink transmission by eliminating duplicate uplink requests. Test results show that the proposed methods significantly reduce the overhead of maintaining client cache consistency in mobile computing systems.


Data Item Size Cache Query Rate Mobile Client Zipf Distribution 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Kwong Yuen Lai
    • 1
  • Zahir Tari
    • 1
  • Peter Bertok
    • 1
  1. 1.School of Computer Science and Information TechnologyRMIT UniversityMelbourneAustralia

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