Abstract: As a result of performing a comparing and determining process of determining the relationship among the bandwidth of distributed data in real time in a local group, the incoming data bandwidth to the local group, and the outgoing data bandwidth from the local group, the increase/decrease management and the connection management of each terminal device in the local group are performed. The comparing and determining process compares, for example, a sum of the total sum of the terminal possessed transfer bandwidths and the incoming data bandwidth from other groups to the local group with a sum of the value obtained by multiplying the bandwidth of distributed data in the local group by the number of terminal devices in the local group, the outgoing data bandwidth from the local group, and a predetermined determination margin.

Abstract: A data distribution system can select paths easily with flexibility when paths are generated. In the data distribution system, a management device includes a node bandwidth information acquisition unit to acquire and hold information on data transmission-enabled bandwidth of each of the plurality of nodes on the network; a content rate acquisition unit to acquire and hold a bandwidth for content to be distributed; a bandwidth splitting information acquisition unit to acquire and hold bandwidth splitting information, which is a splitting ratio to split the content to be distributed into a plurality of bandwidths; and a connection destination decision unit to determine a connection destination of the content to be distributed, which is split based on the bandwidth split information being held in the bandwidth splitting information acquisition unit.

Abstract: As a result of performing a comparing and determining process of determining the relationship among the distribution data band of the data distributed in real time in a local group, the incoming data band to the local group, and the outgoing data band from the local group, the increase/decrease management and the connection management of each terminal device in the local group are performed. The comparing and determining process compares, for example, a sum of the total sum of the terminal possessed transfer bands and the incoming data band from other groups to the local group with a sum of the value obtained by multiplying the distribution data band in the local group by the number of terminal devices in the local group, the outgoing data band from the local group, and a predetermined determination margin.

Abstract: A data distribution system can select paths easily with flexibility when paths are generated. In the data distribution system, a management device includes a node bandwidth information acquisition unit to acquire and hold information on data transmission-enabled bandwidth of each of the plurality of nodes on the network; a content rate acquisition unit to acquire and hold a bandwidth for content to be distributed; a bandwidth splitting information acquisition unit to acquire and hold bandwidth splitting information, which is a splitting ratio to split the content to be distributed into a plurality of bandwidths; and a connection destination decision unit to determine a connection destination of the content to be distributed, which is split based on the bandwidth split information being held in the bandwidth splitting information acquisition unit.