关键词: Web缓存, 预取, 上下文感知, 集成机制

Abstract: Caching and prefetching play an important role in improving the performance of wireless Web access. In this paper， Web caching and prefetching scheme for wireless local area network are studied. The authors present the sequence-mining and lazy-update prediction algorithms respectively based on data mining and information theory， design a context-aware prefetching algorithm and a profit-driven caching replacement policy， and then implement them in Web caching system OnceEasyCache. Performance evaluation experiment results show the integration of the above algorithms can effectively enhance cache hit ratio and delay saving ratio.

Key words: Web caching, prefetching, context-aware, integrated scheme