Patent attributes
When each of a plurality of peers mutually connected through a network receives connection of a new peer, each peer forms group information in which the new peer has been grouped on the basis of comparison of distances on the network among three peers of the own peer, a representative peer of an existing group, and the new peer. When the data is transmitted from the own peer, path information in which destination information of each group which has been grouped on the basis of the group information and the own peer have been registered is formed and transmitted together with the data to the representative peer of each group. When distribution information is relayed from another peer, if the own peer is included in the destination information, the reception data is fetched and the own peer is deleted, thereafter, distribution information in which the destination information of each group which has been grouped on the basis of the group information and the own peer have been registered is formed and transmitted together with the data to the representative peer of each group.
