Information delivery system, information delivery method, node apparatus, and information processing program included in the information delivery system

摘要

A content delivery system and others that solve problems such as a degradation of content quality caused when a plurality of node apparatuses request a content from one node apparatus at the same time. In an information delivery system (S) having a plurality of node apparatuses that constitute a network and are connected to one another, a route node apparatus, which knows the location of a content, determines a communication busyness factor representing the local concentration of communication with respect to a content node apparatus (1h) storing the content. When the communication of this content node apparatus is very busy, the route node apparatus transmits an IP address, which is indicative of an information part storing node apparatus (1z) having stored only a part of the content already received, to request node apparatuses (1j,1f) that are sources of transmitting the request information of the content.