Patent ID: 7639951

Claim:
A contents-delivery system which delivers contents by performing communication, the system comprising: a contents-transmission device transmitting the contents; a contents-reception device receiving the contents from the contents-transmission device; first communication means for performing communication from the contents-transmission device to the contents-reception device via a high-directivity transmission carrier; second communication means for performing communication at least from the contents-reception device to the contents-transmission device; and optical position confirmation means for confirming through optical irradiation whether a position of the contents-reception device with respect to the contents-transmission device is within a range in which the first communication means can communicate, wherein the optical position confirmation means confirms the position of the contents-reception device when the second communication means receives, from the contents-reception device, optical irradiation with the contents-reception device's terminal number added thereto, wherein the contents-transmission device comprises a memory means for storing a table that lists a terminal number of at least one contents-reception device and file names of corresponding delivery-permitted contents, and wherein the first communication means transmits to the contents-reception device a registration status and whether to permit a content delivery after the received contents-reception device's terminal number is compared with the terminal number stored in the table, wherein the contents-transmission device transmits a permitted terminal number and an exclusive control halt signal to the contents-reception device, wherein if the contents-reception device determines that the permitted terminal number is its own, the contents-reception device receives the contents and notifies the contents-transmission device; and wherein if the contents-reception device notifies the content-transmission device a completion of a reception, the contents-transmission device outputs another exclusive control halt signal to the contents-reception device.