P2P-BASED UPDATE CLIENT, SERVER DEVICE, SYSTEM, AND METHOD

A peer-to-peer (P2P)-based update server device comprises: a meta data information analysis unit which analyzes information of a meta data file transmitted from each client through a network using a P2P-based protocol, and groups clients having the same meta data file information into one group; a sub-group management unit which groups clients, which are grouped into the group, into one or more sub-groups according to additional information of each client; and a control unit which manages information on the generated group and sub-group, and transmits information on the sub-group to a corresponding client.