earticle

영어

With development of digital multimedia, many applications, such as VoD, remote education, and so on, becomes a reality. Multimedia resource in education system becomes very rich. With the increasing number of multimedia files in school server, how terminal computers in classrooms fetch multimedia at fast speed and low cost is an important problem to solve. Multimedia used in education system has a long history. In order to decrease bandwidth consumption, a new method of dynamic schedule algorithm based on patching prefetching and proxy prefetching has been proposed. Proxy cache first use unicast to get data from server, and then, data sending to each terminal computer would adopt multicast. Proxy server pre-fetches the patching data for the subsequent request from the ongoing entire stream and caches them at the buffer. Simulation results show that the algorithm can effectively decrease bandwidth without add space of cache.