Utilizing Disks for the Available Link Bandwidth Video Delivery Method

Video is one of key contents in networked multimedia systems. In order to deliver video to a client from a server through network structure effectively, scheduling policies are required since they are continuous media, and resources of the network are restricted. The networked multimedia system allocates resources before videos leave their servers. Then, the method for utilizing the links is a momentous problem, since their capabilities are restricted and their extension is difficult. The policy shown in this paper is that available network bandwidth is used for delivering one video clip at once. The link is exclusively used to deliver only one video clip. On the other hand, buffers and disks can be established easier than link bandwidth as resources of the network. Buffers are provided to prevent overflow, however, an amount of buffer space is restricted. Disks are used for storing the video in temporal. The efficiency of the delivery method is measured by means of initial latency times, network usage ratios and charge-costs of delivery. As this result, the delivery method using disks is more effective than the method without disks