Content distribution system

A center server to which a plurality of terminal devices can be connected, comprising:

• a section for specifying, from among a plurality of content portions into which a content item is divided, a target content portion to be received next by a recipient terminal device being one of the plurality of terminal devices, the target content portion being immediately before or immediately after one or more content portions already stored in the recipient terminal device;
• and
• a section for specifying one of the plurality of terminal devices that stores the specified target content portion, as a sender terminal device for sending the specified target content portion to the recipient terminal device.

A terminal device connectable to a center server, the center server being capable of specifying, from among a plurality of content portions into which a content item is divided, a target content portion to be received next by the terminal device, the target content portion being immediately before or immediately after one or more content portions already stored in the terminal device, and capable of specifying, from among a plurality of terminal devices, a sender terminal device that stores the specified target content portion, the terminal device comprising:

• a receiving section for receiving and storing the specified target content portion from the specified sender terminal device;
• and
• a sending section for sending the one or more content portions already stored in the terminal device to another terminal device.

A computer program for a center server to which a plurality of terminal devices can be connected, the computer program instructing the center server to perform the steps of:

• specifying, from among a plurality of content portions into which a content item is divided, a target content portion to be received next by a recipient terminal device being one of the plurality of terminal devices, the target content portion being immediately before or immediately after one or more content portions already stored in the recipient terminal device;
• and
• specifying one of the plurality of terminal devices that stores the specified target content portion, as a sender terminal device for sending the specified target content portion to the recipient terminal device.

A computer program for a terminal device connectable to a center server, the center server being capable of specifying, from among a plurality of content portions into which a content item is divided, a target content portion to be received next by the terminal device, the target content portion being immediately before or immediately after one or more content portions already stored in the terminal device, and being capable of specifying, from among a plurality of terminal devices, a sender terminal device that stores the specified target content portion, the computer program instructing the terminal device to perform the steps of:

• receiving and storing the specified target content portion from the specified sender terminal device;
• and
• sending the one or more content portions already stored in the terminal device to another terminal device.