| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve end-to-end communication quality and to reduce loads of a network by using an overlay network logically formed on an IP network. <P>SOLUTION: In a management server, when a request of contents is acquired, nodes holding the contents are searched from original nodes and cache overlay nodes, the node having the smallest number of hops (number of relay routers) with a user is selected as a content distribution source node, and it is notified to the overlay node. In the overlay node, a route between the content distribution source node and a distribution request user is determined, the contents are distributed according to the determined route, and when the cache overlay node is present on a content distribution route, the contents are cached there. <P>COPYRIGHT: (C)2012,JPO&INPIT |
