Abstract

Abstract: Caching in mobile computing environment has emerged as a potential technique to improve data access performance and availability by reducing the interaction between the client and server. A cache invalidation strategy ensures that cached item at a mobile client has same value as on the origin server. To maintain the cache consistency, the server periodically broadcasts an invalidation report (IR) so that each client can invalidate obsolete data items from its cache. The IR strategy suffers from long query latency, larger tuning time and poor utilization of wireless bandwidth. Using updated invalidation report (UIR), the long query latency can be reduced. This paper presents a caching strategy that preserves the advantages of existing IR and UIR based strategies and improves on their disadvantages. Simulation results prove that our strategy yields better performance than IR and UIR based strategies.