An improved cache invalidation schema based on Mobile Agent

Caching is the key technology for Mobile Database. In the mobile computing environment, how to guarantee the data in local cache is consistent with the primary copy on the server is the chief consideration in this paper. An improved cache invalidation schema based on Mobile Agent is designed. The proposed schema uses asynchronous invalidation method and the Control Message broadcasted by MSS periodically. MSS maintains for each MC a data structure which stores the latest timestamp for each data item cached by MC. In contract with the traditional cache invalidation algorithm, the analysis and the experimental results show that the improved schema is efficient.