Communication system using communication network and communication method
a communication network and communication method technology, applied in the field of communication systems, can solve problems such as content not being adequately reproducible, content not being validated,
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first embodiment
[0105] A first embodiment of the present invention is now explained.
[0106] The network system embodying the present invention is configured as shown in FIG. 3. In the network system, shown in FIG. 3, an application server 100, a content server 310, a billing server 320, an accessing server 330 and a terminal device 400 are connected to the Internet 21. To a public network 22, a portable telephone set 200, the billing server 320 and the accessing server 330 are connected over a base station 23.
[0107] The base station 23 transmits / receives speech or data, over a radio route, with the portable telephone set 200 and with other portable telephone sets within a preset area, not shown.
[0108] The application server 100 performs the process of validating payable content provided from the content server 310 to the general public, such as music data, picture data or application programs for computers, in cooperation with portable telephone sets 200 or terminal devices 400.
[0109] The portab...
second embodiment
[0266] A second embodiment of the present invention will now be explained. In the second embodiment, when the process of content validation in the portable telephone set 200 or in the terminal device 400 has come to a close, the TID associated with the process is deleted from the application server 100. This enables the hardware resources (such as the HDD storage area) of the application server 100 to be utilized effectively.
[0267]FIG. 21 is a sequence diagram of a transaction to validate the content in the second embodiment of the present invention. FIG. 21 shows an example of content validation using the portable telephone set 200. In FIG. 21, processes similar to the processes shown in FIG. 16 are depicted by the same step numbers and the corresponding explanations are omitted for simplicity. Moreover, the processing by the content server 310 and the billing server 320 is the same as the processing of the first embodiment and hence the content server 310 and the billing server 3...
third embodiment
[0270] A third embodiment of the present invention will now be explained. In the third embodiment of the present invention, there is provided a defensive function against a person with a malignant intention. That is, even if data or messages transmitted on the network are intercepted, the content cannot be validated except by a device used by a person who paid for the content.
[0271]FIG. 22 shows a block diagram illustrating the processing functions of an application server in the third embodiment of the present invention. In FIG. 22, parts or components having the same functions as those of the first embodiment are depicted by the same reference numerals as those used in the first embodiment shown in FIG. 11, and the corresponding description is omitted for simplicity.
[0272] An application server 100a of the third embodiment corresponds to the application server 100 of the first embodiment shown in FIG. 11 except that it includes an encryption unit 116. Additionally, the function ...
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