AGENT BASED MECHANISM FOR MAINTAINING CACHE CONSISTENCY IN MOBILE ENVIRONMENT

Caching at the mobile client is prospective technique that can reduce the number of uplink requests, lighten the server load .However, Variable data size, data updates ,limited client resource and frequent client disconnection make cache management a challenge .object caching is often used to improve the performance of mobile application .Consistency approach to maintaining cache consistency with the use of Invalidation (or) update reports. The server periodically broadcasts updates (or) invalidation report to clients .update report reflect the changes in the state database. A drawback of this method is that invalidation report impose a high processing load on clients .clients have to listen to all report ,even through there may be no changes in the data caching .With the aim of reducing the cache consistency maintenance work .I have proposed agent based mechanism to save wireless bandwidth ,reduce network traffic and reduce the workload in server .Based on the mechanism derived queuing model for the simulation .Moreover Ns2 simulation performance were analyze the result proposed technique over existing system.