A Prefetching-based Caching Policy in Streaming Service Systems
流媒体服务系统中一种基于数据预取的缓存策略

Customers can not get high QoS from the streaming service systems with VCR operation because of the random requests. This paper derives the expectation of the demanding delay with the methods of prefetching and segment-based caching. A near-optimal policy of cache management is given, and the solution can approximate to the optimal one by computing online. The prefetching algorithm is given in the paper. The algorithm can reduce the delay of demands from clients with cooperation of caching and prefetching for improving the efficiency of cache. Simulation results show the effectiveness of proposed algorithm.