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| A Prefetching-based Caching Policy in Streaming Service Systems |
| Wu Xu-min Yin Bao-qun Huang Jing Guo Dong |
| Joint Lab of Network Communication System and Control, Anhui Key Lab of Network Communication System and Control, University of Science and Technology of China, Hefei 230027, China |
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Abstract 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.
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Received: 15 October 2009
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Corresponding Authors:
Wu Xu-min
E-mail: xuminwu@mail.ustc.edu.cn
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2010, Vol. 32 
