An adaptive callback cache access for wireless Internet

We propose a two-level adaptive callback access mechanism for wireless data access. In the first level, cache size in a mobile termination is adaptively adjusted based on update-to-access-ratio. In the second level adaptation, when an object is updated at the server, whether to send the object directly or an invalidation message, adaptively depends on the object size. We analytically model cost function, and the optimal cache size and the optimal adaptation threshold value are obtained simultaneously. Both simulations and analytical results are used to study the performance.