NETWORK SYSTEM, NODE DEVICE, DATA DISTRIBUTION METHOD, INFORMATION RECORDING MEDIUM, AND PROGRAM

摘要

A distribution request sending unit (301) sends a distribution request to a server. When a terminal (12) is selected by the server as a highest-level node and introduced by the server to other nodes, a routing unit (302) of the selected terminal determines a distribution route among these nodes such that the route goes from higher-level to lower-level nodes, starting from the selected terminal. A data receiving unit (303) receives data distributed by an immediate higher-level node, to which it gains connection in accordance with the determined distribution route. A data sending unit (308) connects to an immediate lower-level node in the distribution route if such a node exists, and sends the received data there. In the case of a lowest-level node, its receipt acknowledge returning unit (309) returns a receipt acknowledge for the data received by the data receiving unit (303) to the highest-level node upon the data reception.