Abstract
The content management methods based on the priority for the number of access, time and so on have been studied in cached video content distribution systems. However, since the variation related to the content access as a practical model has not been sufficiently considered so far, problems are still left for the variation of the number of access, and for the variation of the multiple-quality for each time zone. This paper proposes a cached video content management method by using priority estimation based on a content property. Considering the updating status of the cached contents, two kinds of contents, i.e., a regular content and a periodical updating content, are defined, and each content priority is used. Its priority is estimated by using the number of access in the reference intervals and the ratio between two qualities. The 1day model is used as an evaluation model and the variation models of the number of access and the quality are defined. An LFU method is used as a conventional method (CM), and the simulation experiments to compare the cache efficiency are performed, between CM and the proposed method based on these models. Consequently, since the hit ratio of cached contents in the proposed method is found to be 12–22 percent greater than the ones in CM, the proposed method is judged to be more superior than CM.
