Patent ID: 7882168
Filing Date: 2011-02-01
Classification: G06F,H04L

Abstract:
1. A node apparatus in a contents distribution system which, being configured of a plurality of node apparatus disposed dispersed in a network, carries out a transmission and reception of contents data among the node apparatus, the node apparatus comprising: a routing table storage section which stores a routing table in which are correlated identification information and position information of one portion of node apparatus among the plurality of node apparatus; a message destination determination section which, based on destination identification information of a message received via the network and on the routing table, determines whether or not the message received is addressed to its own node apparatus; a message forwarding section which, in the event that it is determined by the message destination determination section that a message received via the network is not addressed to its own node apparatus, based on the destination identification information of the message received, retrieves the position information of a forwarding destination node apparatus from the routing table, and forwards the message received to the forwarding destination node apparatus; a distribution source information storage section which has a management information storage area storing first position information, which is position information of a management subject contents holding node apparatus which holds contents data which are a subject of management in its own node apparatus, and an extended management information storage area storing second position information, which is position information of a node apparatus holding the position information of the management subject contents holding node apparatus; a distribution source information selection section which, in the event that it is determined by the message destination determination section that a message received via the network is addressed to its own node apparatus, and that it is a request for a transmission of contents data distribution source information, selects either the first position information or the second position information from the distribution source information storage section; a contents data distribution source information return section which, when the first position information is selected by the distribution source information selection section, returns the first position information to a node apparatus which has requested the contents data distribution source information, via the network; and a contents data distribution source information transmission request forwarding section which, when the second position information is selected by the distribution source information selection section, forwards a request, via the network, to transmit the contents data distribution source information to a node apparatus of the second position information.