| Summary: | 碩士 === 國立交通大學 === 資訊科學學系 === 83 === Recent advances in Cable TV and computer network will allow the
network/service/content providers to offer residential custo-
mers with video-on-demand services. In this thesis we propose a
three-level hierarchical network storage architecture for
video- on-demand storage system. In the first-level (Local
Service Cen- ter, LSC) a limited number of high vision
probability programs are stored; in the second-level (Local
Central Service Center, LCSC) a few second high vision
probability programs are stored; the third-level (Central
Service Center, CSC) contains all pro- grams provided in the
system. Based on this architecture and the program vision
probability distribution function, we use a mini- mum-cost
function to find out the numbers of programs stored in the two
service centers( LSC and LCSC) and numbers of links among these
three service centers. We also propose a program realloca- tion
algorithm according to the change in user request pattern.
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