Patent ID: 8068512

Claim:
A data center for use in a mobile communication system that includes mobile phones, a radio access network, and a core network, wherein the data center communicates with an external network provided outside the mobile communication system, comprising: an individual storage unit having storage areas for the respective mobile phones; a shared storage unit having a storage area for sharing by the mobile phones; a shared/individual determining unit configured to receive data requested by at least one of the mobile phones from an external node of the external network and to store the received data in one of the individual storage unit and the shared storage unit that is selected according to predetermined criteria; a data arrangement information generating unit configured to generate a data arrangement list according to statistics of the received data and predetermined cache data arrangement conditions, the predetermined cache data arrangement conditions being information about cache servers of the radio access network and cache servers of the core network; and a unit configured to transmit an instruction signal to at least one of the shared storage unit and the individual storage unit according to the data arrangement list, so that the data received by the data center from the external node of the external network provided outside the mobile communication system are transferred from the at least one of the shared storage unit and the individual storage unit of the data center to a cache server provided on the core network or a cache server provided on the radio access network.