JP4803603B2 - Content distribution system, terminal device, target device, and content distribution method - Google Patents

Description

  The present invention relates to a content distribution system, a terminal device, a target device, and a content distribution method, and more particularly to a content distribution system, a terminal device, a target device, and a content distribution method for distributing content from the content distribution device to the terminal device.

Conventionally, for example, predetermined data is transmitted from a terminal device possessed by a user to a content distribution apparatus that displays data such as images in a public place or an art museum and provides information to people, and the content distribution apparatus 2. Description of the Related Art A content distribution system that distributes data (hereinafter referred to as content) related to displayed image data to a terminal device is known (see, for example, Patent Document 1). In such a content distribution system, unique data such as an address of the terminal device is transmitted from the terminal device to the content distribution device by infrared rays or the like, and the content is distributed to the terminal device based on this address.
JP 2005-244469 A

  However, in the above conventional technique, there is a problem in terms of security protection and information leakage because it is necessary to transmit unique data of the terminal device to the content distribution device. In particular, when infrared rays are used for transmission of unique data, there is a risk that information leakage can easily occur if the infrared rays are intercepted by a third party.

  The present invention has been made in view of the above points, and its purpose is to prevent the identification data of the terminal device from being stolen by a third party when receiving content distribution from the content distribution device. An object of the present invention is to provide a content distribution system, a terminal device, and a content distribution method that allow a user of the terminal device to know that communication is normally performed between the terminal device and the target device.

The present invention has been made to solve the above problem, and in a content distribution system including a terminal device, a target device, and a content distribution device, the terminal device generates a first session key. A key generation unit, a second session key generation unit that generates a second session key having a predetermined relationship with the first session key, and whether or not the first session key is received by the target device A reception identification data generation unit that generates reception identification data to be confirmed, a first transmission unit that transmits the first session key and the reception identification data to the target device, and the second session. A second transmission unit that transmits a key to the content distribution device, wherein the target device preliminarily stores target device identification data for identifying the target device. A target device identification data storage unit to be stored; and when the first session key and the reception identification data are received from the terminal device, the first session key and the target device identification data storage unit store A third transmission unit that transmits the received device identification data to the content distribution device, and a notification unit that notifies that the reception identification data has been received when the reception identification data is received from the terminal device; The content distribution device includes a content storage unit that stores target device identification data and content in association with each other in advance, a first session key transmitted from the target device, and a second transmitted from the terminal device. A determination unit that determines whether or not the session key has a predetermined relationship, and the determination unit includes the first session key and the second session key And Sshonki comprises a content delivery unit for delivering to the terminal device the content corresponding to the transmitted target device identification data is read from the content storage unit from the target device if it is determined to have a predetermined relationship.
In the present invention, content can be acquired from a content distribution device without transmitting identification data of the terminal device to the target device. For this reason, it is possible to prevent the identification data of the own terminal device from being stolen by a third party when receiving the content distribution from the content distribution device.
Further, the user of the terminal device can know whether or not the first session key has been normally transmitted from the terminal device to the target device based on whether or not the notification unit has notified the reception identification data. .

  In the terminal device that communicates with the target device and the content distribution device, the present invention provides a first session key generation unit that generates a first session key, and a second that has a predetermined relationship with the first session key. A second session key generation unit that generates a session key of the reception identification data generation unit that generates reception identification data for confirming whether or not the first session key has been received by the target device; A first transmission unit configured to transmit a first session key and the reception identification data to the target device; and a second transmission unit configured to transmit the second session key to the content distribution device.

Further, the reception identification data generating unit of the present invention generates the reception identification data in advance.
In the present invention, since the reception identification data generation unit generates reception identification data in advance, the reception identification data is obtained when the first transmission unit transmits the first session key and the reception identification data. No need to generate.

The present invention further includes a reception identification data selection unit that selects any one of the reception identification data from a plurality of reception identification data based on a user operation, and the reception identification data generation unit includes the reception identification data generation unit. The reception identification data selected by the identification data selection unit is generated.
In the present invention, the user can change the reception identification data transmitted from the terminal device to the target device each time the data is transmitted.

Further, the present invention outputs a reception identification data determination unit that determines any reception identification data from among a plurality of reception identification data, and the reception identification data determined by the reception identification data determination unit A data output unit for reception identification.
In the present invention, since the reception identification data determined by the reception identification data determination unit is output by the reception identification data output unit, the user can identify what reception identification the terminal device of the terminal device has with respect to the target device. You can know if you have sent the data.

In addition, the reception identification data generation unit of the present invention generates identification data shared between the terminal device and the target device as the reception identification data.
In the present invention, the reception identification data transmitted from the terminal device to the target device can be simplified.

In addition, the reception identification data generation unit of the present invention generates image data as the reception identification data.
In the present invention, image data created by a user can be generated as reception identification data.

  Further, the present invention provides a target device identification data storage unit that stores in advance target device identification data for identifying a target device in a target device that communicates with a terminal device and a content distribution device, and the first session from the terminal device. A first transmission unit that transmits the first session key and the target device identification data stored in the target device identification data storage unit to the content distribution device when the key and the reception identification data are received And a notification unit for notifying that the reception identification data has been received when the reception identification data is received from the terminal device.

  According to the present invention, in the content distribution method using the terminal device, the target device, and the content distribution device, the terminal device generates a first session key that generates a first session key; A second session key generation process for generating a second session key having a predetermined relationship with the session key, and reception identification data for confirming whether or not the first session key has been received by the target device A reception identification data generating process, a first transmission process of transmitting the first session key and the reception identification data to the target apparatus, and the second session key to the content distribution apparatus. A second transmission step of transmitting, and the target device stores target device identification data for previously storing target device identification data for identifying the target device. And storing the first session key and the target device identification data stored in the target device identification data storage step when the first session key and the reception identification data are received from the terminal device. A third transmission process for transmitting to the content distribution apparatus; and a reception identification data reception notification process for notifying that the reception identification data has been received when the reception identification data is received from the terminal apparatus. The content distribution device stores a content storing process in which target device identification data and content are associated with each other in advance, a first session key transmitted from the target device, and a second session transmitted from the terminal device. A determination process for determining whether or not a key has a predetermined relationship; and the first session key and the key in the determination process And 2 session key to perform a content distribution process that distributes to the terminal device reads the content corresponding to the transmitted target device identification data from the target device if it is determined to have a predetermined relationship.

  In the present invention, it is possible to prevent the identification data of the own terminal device from being stolen by a third party when receiving content distribution from the content distribution device, and communication between the terminal device and the target device is normally performed. A content distribution system, a terminal device, and a content distribution method are provided.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram showing an outline of a content distribution system according to an embodiment of the present invention. This content distribution system includes a terminal device 10 (10a to 10c), a target device 20, a reference device 30, and a content storage device 40 (40a to 40c). Here, the case where the reference device 30 and the content storage device 40 are separate devices has been described. However, the present invention is not limited to this, and the reference device 30 and the content storage device 40 are connected to the content distribution device. It may be configured by a single device.
The content distribution system is a system for distributing content as data related to the target device 20 to the terminal device 10 owned by the user. As the target device 20, for example, there is a data display device that is installed in a city or the like and provides image data and character data to people. In this case, content related to the image data and character data is distributed to the terminal device 10. In addition, the target device 20 can be installed near an exhibit such as a painting or sculpture in a museum or the like, and content related to the exhibit can be distributed to the terminal device 10.

  In FIG. 1, the terminal device 10 generates two session keys SK1 and SK2, transmits one session key (referred to as SK1) to the reference device 30 via the target device 20, and transmits the other session key (SK1). SK2) is directly transmitted to the reference device 30. The terminal device 10 also transmits an address on the network 60 of the terminal device 10 to the reference device 30 as data specifying the terminal device 10. In addition to transferring the session key SK1 to the reference device 30, the target device 20 also transmits a unique spot ID (Identification) that identifies the target device 20 and a context ID that indicates the current state of the target device 20 (which is distributed by this context ID). To the reference device 30).

  The session key SK1 is transmitted from the terminal device 10 to the target device 20 by infrared communication. Therefore, the user goes to the vicinity of the target device 20 with the terminal device 10 and performs a predetermined operation with the terminal device 10 facing the target device 20. In addition, communication is performed between the reference device 30, the terminal device 10, and the target device 20 via a wired LAN (Local Area Network), a wireless LAN, or other network not shown.

The reference device 30 that has received the session keys SK1 and SK2 sent via two different paths collates the two session keys and determines whether or not the session keys SK1 and SK2 have a predetermined relationship. To do. In the first embodiment of the present invention, the relationship that the session key SK1 and the session key SK2 are the same is used as the predetermined relationship. In this example, the terminal device 10 generates two identical session keys SK1 and SK2 (that is, SK1 = SK2), and these are transmitted to the reference device 30 through different paths.
In the present embodiment, the relationship that the session key SK1 and the session key SK2 are the same is used as the predetermined relationship, but other relationships may be used. For example, a hashed session key SK1 can be used as the session key SK2.

  When it is determined in the reference device 30 that the session keys SK1 and SK2 have the predetermined relationship, the reference device 30 obtains the content by the terminal device 10 (identifying the terminal device 10 by the transmitted address). As data to be transmitted, a URL (Uniform Resource Locator) indicating the location on the network 60 where the content is stored is transmitted to the terminal device 10. The URL to be transmitted is determined by the reference device 30 according to the spot ID and context ID received from the target device 20. In order to make the determination, the reference device 30 stores a correspondence table indicating the correspondence between the spot ID and context ID and the content URL.

  Content distributed to the terminal device 10 is stored in the content storage device 40. The terminal device 10 that has received the URL accesses the content storage device 40 corresponding to the URL and requests content. In response to this request, the content storage device 40 distributes the target content to the terminal device 10.

Here, the session keys SK1 and SK2 generated by the terminal device 10 are configured not to include data unique to the terminal device 10 in order to prevent the terminal device 10 from being specified by the target device 20. In addition, since it is possible to determine that the session keys SK1 and SK2 acquired by two different paths in the reference device 30 are sent from the same terminal device 10, the session keys from other terminal devices are duplicated. The session keys SK1 and SK2 are configured as character strings not to be processed.
Further, the terminal device 10 transmits the reception identification data K1 together with the session key SK1 to the target device 20. When the target device 20 receives the reception identification data K1, the target device 20 generates image data based on the reception identification data K1, and displays to the user that the transmission data of the terminal device 10 has been acquired by the target device 20. .

The target device 20 generates image data such as an icon based on the reception identification data K1 transmitted by the terminal device 10. At this time, the reception identification data K1 and the image data are associated with each other by a common rule between the terminal device 10 and the target device 20. For example, when the image data output in the target device 20 is an icon displayed on the display screen, the terminal device 10 and the target device 20 have a common display icon table in which an ID is assigned to each icon, and the terminal device 10 When an ID, which will be described later, is transmitted as the reception identification data K1, the target device 20 extracts an icon corresponding to the ID from the display icon table and displays it as a reception confirmation.
Further, the terminal device 10 needs to select the reception identification data K1 so that the user can identify the image data corresponding to his / her terminal device. The following method can be used as a method for selecting the reception identification data K1.

(1) As a first method for selecting the reception identification data K1, a method for setting the reception identification data K1 in the terminal device in advance will be described. In this method, the terminal device 10 includes a user interface for the user to set the reception identification data K1, and the user sets the reception identification data K1 in advance. This user interface displays a list of image data candidates, for example, and registers reception identification data K1 associated with the image data selected by the user. The terminal device 10 transmits the preset reception identification data K1 together with the session key when transmitting infrared rays, and the target device 20 displays image data based on the received reception identification data K1. The user can confirm that the data transmitted from his / her terminal device has been normally received by the target device 20 by displaying the image data registered in advance by the user on the target device 20.
Setting the reception identification data K1 in this way has an advantage that the user can use his / her favorite image data and can easily identify at a glance when the data is output to the target device.

(2) As a second method of selecting the reception identification data K1, a method in which the user selects the reception identification data K1 during infrared transmission will be described. In this method, the user selects image data every time the terminal device 10 performs infrared transmission. When the user presses the infrared transmission button, the terminal device 10 displays some image data candidates on the display device. The selection of candidates to be displayed on the terminal device 10 may be selected at random by the terminal device, or the order may be set in advance. The user selects one image data from the displayed candidates, and the terminal device 10 transmits reception identification data K1 associated with the image data selected by the user from the candidates.
When the user determines the reception identification data K1 at the time of transmission in this way, the user can easily identify at a glance when the reception identification data is received by the target device, and the icon can be changed each time transmission is performed. There is an advantage in that it is difficult to identify a user from a third party even when the selection is performed continuously.

(3) As a third method for selecting the reception identification data K1, a method in which the terminal device automatically selects the reception identification data K1 will be described. In this method, the terminal device 10 determines the reception identification data by selecting it randomly or based on a preset order. Each time there is an infrared transmission request from the user, the terminal device 10 determines and transmits the reception identification data and outputs a reception confirmation associated with the transmitted reception identification data to the display device of the terminal device. Notify The user can confirm that transmission data from his / her terminal device has been received by the target device by displaying the same image data as the image data output to the terminal device 10 on the target device 20.
If the reception identification data K1 is determined in this way, there is an advantage that the user does not need to set the reception identification data K1. In addition, since the reception identification data K1 determined in this way can be selected at random, the output of the target device is unlikely to be the same, and even when the same user makes successive selections, identification of the user from a third party is possible. It becomes difficult to be done.

  FIG. 2 is a block diagram showing a configuration of the terminal device 10 in the content distribution system of FIG. The terminal device 10 includes a user input unit 101, a session key generation unit 102, a session key conversion unit 103, an infrared transmission processing unit 104, a network transmission processing unit 105, a content request processing unit 106, a network reception processing unit 107, and a display processing unit 108. , A display unit 109, an infrared transmission unit 110, a network transmission / reception unit 111, a reception identification data generation unit 112, and a reception identification data conversion unit 113.

  The user input unit 101 is an interface that receives an operation input from a user. For example, a cursor key for selecting a menu or a command on the display screen (display unit 109) or a button assigned to a command for a specific purpose Etc. As the contents of the operation input from the user, the operation input for starting the acquisition of the content by transmitting infrared rays from the infrared transmission unit 110, the operation input for accessing the URL received from the reference device 30 and requesting the content are distributed. There are an operation input for changing the display state such as scrolling the displayed content and displaying the content on the display screen, and an operation input for determining the reception identification data K1. When an operation input for infrared transmission is performed, a session key generation command is output to the session key generation unit 102 and a reception identification data K1 generation command is output to the reception identification data generation unit 112. When a content request operation input is performed, a content request command is output to the content request processing unit 106.

Session key generation unit 102 generates session keys SK1 and SK2 and outputs them to session key conversion unit 103. The session key generation unit 102 generates a session key according to a predetermined algorithm.
Session key conversion unit 103 converts the session key generated by session key generation unit 102 into the data format of data transmitted from infrared transmission unit 110 or network transmission / reception unit 111, and transmits the converted session key SK1 by infrared transmission. The converted session key SK2 is output to the processing unit 104 to the network transmission processing unit 105, respectively.

The infrared transmission processing unit 104 performs processing such as data modulation used for infrared communication on the input session key SK1 and reception identification data K1, and transmits the processed session key SK1 and reception identification data K1 to the infrared transmission unit. 110 to the target device 20.
The URL acquired from the reference device 30 from the network reception processing unit 107 is input to the content request processing unit 106. In accordance with this URL, the content request processing unit 106 generates content acquisition request data for requesting the content storage device 40 corresponding to the URL to deliver the target content, and performs the network transmission processing on the generated content acquisition request data. Output to the unit 105.

  The network transmission processing unit 105 converts the session key SK2 input from the session key conversion unit 103 and the content acquisition request data input from the content request processing unit 106 into data of a predetermined communication protocol. For example, when the terminal device 10 and the reference device 30 or the content storage device 40 are connected by a wireless LAN and TCP / IP (Transmission Control Protocol / Internet Protocol) is used as a communication protocol, the input data packet And adding headers. The converted data is output to the network transmission / reception unit 111, the session key SK2 is transmitted from the network transmission / reception unit 111 to the reference device 30, and the content acquisition request data is transmitted to the corresponding content storage device 40. The network transmission processing unit 105 also transmits address data on the network of the terminal device 10 from the network transmission / reception unit 111 to the reference device 30.

In addition to transmitting the above data, the network transmitting / receiving unit 111 receives data from the reference device 30 and the content storage device 40 and outputs the received data to the network reception processing unit 107. The data from the reference device 30 is URL data indicating the storage location of the content related to the content distribution request, and the data from the content storage device 40 is the content to be distributed.
The network reception processing unit 107 performs processing such as header removal and packetized data reconstruction on the data input from the network transmission / reception unit 111. Among the processed data, the URL data from the reference device 30 is sent to the content request processing unit 106 and the display processing unit 108, and the content from the content storage device 40 is output to the display processing unit 108.

The display processing unit 108 performs processing for causing the display unit 109 to display the input URL data and content. For example, if the content is encoded image data, it is decoded and output to the display unit 109, and if it is character data, it is output to the display unit 109 as character data.
The display unit 109 is a display device that displays data input from the display processing unit 108, and includes a liquid crystal panel or the like. In the present embodiment, when the reception identification data is received from the target device 10, the display unit 109 is used as a notification unit that notifies that the reception identification data has been received. However, the present invention is not limited to this. Absent. For example, when audio data is included in the content to be distributed, an audio processing unit or speaker for reproducing audio data may be provided instead of the display unit 109, or the audio processing unit or speaker may be provided as a display unit. 109 may be provided.

The reception identification data generation unit 112 generates reception identification data K1 and outputs the reception identification data K1 to the reception identification data conversion unit 113. The generation method of the reception identification data K1 is set in advance as to which of the above-described generation methods of the reception identification data K1 of (1) to (3) is used. In response to a request from the user input unit 101, a session key is generated according to the set algorithm.
The reception identification data conversion unit 113 converts the reception identification data K1 generated by the reception identification data generation unit 112 into a data format of data transmitted from the infrared transmission unit 110, and converts the received identification data for conversion. K1 is output to the infrared transmission processing unit 104.

FIG. 3 is an external view of the terminal device 10 according to the first embodiment of the present invention. A display unit 109 and a user input unit 101 are provided on the front surface of the terminal device 10, and an infrared transmission unit 110 and a network transmission / reception unit 111 are provided on the top surface.
Although not shown in detail in the user input unit 101, an infrared transmission button that is operated at the start of content acquisition, a content request button that is operated when content distribution from the content storage device 40 is started, a menu selection and reception confirmation selection In addition, up / down / left / right cursor keys to be operated for browsing / scrolling the distributed content are arranged. The network transmission / reception unit 111 is configured as a wireless antenna. When the user presses the infrared transmission button to transmit the session key SK1 and the reception identification data K1 to the target device 20, the operation is performed with the surface on which the infrared transmission unit 110 is provided facing the target device 20. .

  FIG. 4 is a block diagram showing the configuration of the target device 20 of the content distribution system according to the first embodiment of the present invention. The target device 20 includes an infrared reception unit 201, an infrared reception processing unit 202, a data generation unit 203, a spot database 204, a state management unit 205, a network transmission processing unit 206, an output processing unit 207, an image display unit 208, and reception identification data. A generation unit 209 and a spot ID storage unit 210 are provided.

The session key SK1 and the reception identification data K1 transmitted from the terminal device 10 by infrared are received by the infrared receiving unit 201, and predetermined processing such as data demodulation is performed by the infrared receiving processing unit 202, and the session key SK1 is data. The reception identification data K1 is input to the generation unit 203 and the reception identification data generation unit 209, respectively.
The data generation unit 203 refers to the received session key SK1, the context ID input from the state management unit 205, and the spot ID stored in the spot ID storage unit 210 (ID unique to the target device 20). Transmission data to be transmitted to the device 30 is generated and output to the network transmission processing unit 206.

The network transmission processing unit 206 converts the input transmission data into a predetermined communication protocol, and transmits the converted transmission data to the reference device 30. For example, when TCP / IP is used as a communication protocol, input data is packetized and a header is added.
In the spot database 204, context data that is data to be displayed on the image display unit 208 and a context ID that designates the context data are stored in association with each other. By preparing a plurality of context data, a large amount of data can be switched and displayed on one target device 20.

  The state management unit 205 manages switching of context data to be displayed on the image display unit 208. Specifically, the state management unit 205 selects and reads context data from the spot database 204 according to the above conditions. Then, the read context data is output to the output processing unit 207 (display on the image display unit 208 is performed), and the context ID corresponding to the read context data is output to the data generation unit 203. Since different context data is selected under different conditions, the display of the image display unit 208 is switched accordingly. Further, the context ID input to the data generation unit 203, that is, the context ID transmitted to the reference device 30 indicates the current state of the target device 20 (display content of the image display unit 208).

The output processing unit 207 performs processing for displaying the context data input from the state management unit 205 and the reception confirmation input from the reception identification data generation unit 209 on the image display unit 208. The image display unit 208 is a display device that displays context data and reception identification data, and includes a liquid crystal panel, a plasma display panel, or the like.
The reception identification data generation unit 209 generates corresponding reception confirmation output data based on the received reception identification data K1. In the output data generation method, the relationship between the reception identification data K1 and the reception identification data described above is set in advance, and the reception identification data generation unit 209 generates the reception identification data according to this relationship. The generated reception identification data is output to the output processing unit 207.

  FIG. 5 is a diagram showing an example of a spot database stored in the spot database 204 according to the first embodiment of the present invention. In FIG. 5, for example, Context-A, which is context data, is assigned 1 as a context ID. Each context data has a predetermined condition for displaying the context data. This condition includes, for example, day of the week, weather, temperature, and the like. That is, the display of the image data (context data) displayed on the image display unit 208 can be switched according to the day of the week, the weather, and the temperature.

  FIG. 6 is an external view of the target device 20 and the like according to the first embodiment of the present invention. FIG. 6 is an example of the flat display type target device 20, and an infrared receiving unit 201 is installed on the upper part of the image display unit 208. A user having the terminal device 10 operates the terminal device 10 toward the infrared receiving unit 201. The target device 20 displays a different icon for each terminal device on the image display unit 208 in order to notify the user that the infrared light receiving unit 201 has acquired data.

FIG. 7 is a diagram illustrating an example of a screen display in the image display unit 208 of the target device 20 in FIG. The image display unit 208 of the target device 20 is provided with a moving image display area 2081, a still image display area 2082, a telop display area 2083, a web content display area 2084, and the like. The display of each of these areas is switched by the context data in the spot database 204.
Further, when data is received from the terminal device 10, a reception identification data display area 2085 for displaying an icon of reception identification data based on the reception identification data K1 from each terminal device is provided.

8A to 8D are diagrams illustrating an example of reception identification data displayed in the reception identification data display area 2085 of the image display unit 208 of the target device 20.
FIG. 8A is a display example when characters are used as reception identification data. The user distinguishes the reception identification data from each terminal device by the numbers and alphabets displayed on the target device 20. At this time, the terminal device 10 has a method of transmitting a character code such as an ASCII code as reception identification data in addition to a method of using a common table.
In addition to the alphabet, kanji and symbols may be used as characters to be used. In this case, a character code such as SJIS (Shift Japan Industrial Standard), EUC (Extended UNIX (registered trademark) Code) or UTF (UCS Transformation Format) is used instead of the ASCII code. Further, FIG. 8A shows the case where the reception identification data for each terminal device is composed of single-character image data, but a plurality of characters may be used in combination.

FIG. 8B is a display example when colors are used as reception identification data. The user distinguishes the reception identification data from each terminal device according to the color of the icon displayed on the target device 20. At this time, the terminal device 10 has a method of transmitting a color code as reception identification data in addition to a method of using a common table. For example, when the color code is transmitted in RGB, the terminal device transmits reception identification data of ff0000 if the color code is red.
The color code may use color data based on YUV in addition to the described RGB.

  FIG. 8C shows a display example when a picture or icon is used as the reception identification data. The icon data has a table common to the terminal device 10 and the target device 20 as bitmap data, and uses an icon ID assigned to each data as reception identification data. The icons may be distinguished using not only still images but also animation patterns.

FIG. 8D shows a display example when the display position is used as reception identification data. The user selects each icon according to the display location (here, the display area is divided into 10 areas) of the icon (here, the star image data is used as the icon) displayed on the target device 20. Data for receiving identification from the terminal device is distinguished. At this time, the terminal device 10 transmits the display area number assigned to the display area of the target device 20 as reception identification data. FIG. 8D shows a case where three terminal devices select 4, 6, and 9 as area numbers, and stars are displayed in the fourth, sixth, and ninth display areas of the display screen, respectively. It is displayed.
Note that coordinate values based on X-axis and Y-axis values may be used instead of the display area number.
In addition, it is determined that the icon is turned on for 1 and the icon is turned off for 0, and data such as 101010 is transmitted as reception identification data, so that other terminals can be used depending on the icon blinking pattern displayed. Various methods for distinguishing reception from each terminal may be used by making it possible to distinguish display contents such as being able to distinguish from device reception confirmation.

Moreover, you may use combining each method demonstrated by the said FIG. 8 (A)-FIG. 8 (D), such as combining an alphabet and color data.
Here, the display for the reception identification data display area 2085 in the screen has been described. However, the display may be performed at any place in the image display unit 208, or a dedicated display for reception confirmation display is provided outside. May be. Furthermore, by applying the method described with reference to FIG. 8D, a device in which lamps are arranged outside may be connected and turned on.

  FIG. 9 is a block diagram showing a configuration of the reference device 30 of the content distribution system according to the first embodiment of the present invention. The reference device 30 includes a network reception processing unit 301, a network transmission processing unit 302, a session key management unit 303, a content determination unit 304, a session key database 305, and a content database 306.

  The network reception processing unit 301 receives transmission data from the target device 20 including the session key SK1, the spot ID, and the context ID, and outputs the transmission data to the session key management unit 303. Also, it receives the session key SK 2 and the address of the terminal device 10 transmitted from the terminal device 10, outputs the session key SK 2 to the session key management unit 303, and outputs the address of the terminal device 10 to the content determination unit 304.

  The session key management unit 303 records the session key SK1, the spot ID, and the context ID included in the received transmission data in the session key database 305 in association with each other. When the session key SK2 is received and input from the network reception processing unit 301, the session key SK1 is compared with the session key SK1 in the session key database 305, and the input session key SK2 and each session key SK1 It is determined whether or not there is a relationship (a relationship in which the session keys SK1 and SK2 are the same in the first embodiment of the present invention). If the session key SK1 in the session key database 305 has the predetermined relationship, the spot ID and context ID corresponding to the session key SK1 are output to the content determination unit 304.

  FIG. 10 is a diagram showing an example of a session key database stored in the session key database 305 according to the first embodiment of the present invention. In the session key database, a session key, a spot ID, a context ID, and an upd are stored in association with each other. As upd, the time when data is received from the target device 20 is recorded. In FIG. 10, for example, data in the first row is data relating to a content distribution request made in a state where an image display corresponding to context ID = 0 is performed in the target device having spot ID = 1. 10 indicates that the session key transmitted from SK1 = fa03948591fcb629a124d0s6cba1962e729ca7b01 and the time when the data was received is 2006-06-05 15:22:35 (06:05, 15:22:35) ing.

FIG. 11 is a diagram showing an example of a database stored in the content database 306 according to the first embodiment of the present invention. The content database 306 stores a spot ID, a context ID, and data for acquiring content in association with each other.
In FIG. 11, for example, the URL of the location on the network 60 where the content corresponding to the spot ID = 1 and the context ID = 1 is stored is http: // example. com / i /. Also, here, the target device with spot ID = 1 has four context IDs, the target device with spot ID = 2 has one context ID, and the target device with spot ID = 3 has five context IDs. The case where it has is shown.

  FIG. 12 is a block diagram showing the configuration of the content storage device 40 of the content distribution system according to the first embodiment of the present invention. The content storage device 40 includes a network reception processing unit 401, a content processing unit 402, a content database 403, and a network transmission processing unit 404.

  The network reception processing unit 401 receives the content acquisition request data transmitted from the terminal device 10 and outputs it to the content processing unit 402. The content processing unit 402 reads the content corresponding to the URL specified by the content acquisition request data from the content database 403 and outputs it to the network transmission processing unit 404. The network transmission processing unit 404 transmits the content to the terminal device 10 that is the content request source. The content database 403 stores content corresponding to each URL.

FIG. 13 is a sequence diagram showing processing of the content distribution system according to the first embodiment of the present invention. FIG. 14 is a diagram illustrating an example of an image displayed on the display unit 109 of the terminal device during the processing according to the sequence diagram of FIG.
The content distribution system starts its operation when the user presses the infrared transmission button of the terminal device 10. For example, when the user desires content related to the image data displayed on the image display unit 208 of the target device 20, the user goes near the target device 20 and sets the infrared transmission unit 110 of the terminal device 10 to the target device. The infrared transmission button is pressed toward 20. At this time, an initial screen on which a message “please press the button” is displayed on the display unit 109 of the terminal device 10 as shown in FIG. 14A in the initial state.

  When the terminal device 10 receives an operation input from the user by pressing the infrared transmission button, the terminal device 10 generates session keys SK1 and SK2 (step S101). On the other hand, reception identification data K1 is generated (step S111). Then, the session key SK1 and the reception identification data K1 are transmitted from the infrared transmission unit 110 to the target device 20 (step S102), and the session key SK2 and the address of the terminal device 10 are transmitted from the network transmission / reception unit 111 to the reference device 30 ( Step S105). At this time, a screen having a message “session key is being sent” is displayed on the display unit 109 of the terminal device 10 as shown in FIG.

  The target device 20 that has received the session key SK1 and the reception identification data K1 generates reception identification data from the reception identification data K1 (step S112), and displays the reception identification data on the display unit 109 (step S113). ). The received session key SK1, the spot ID stored in the spot ID storage unit 210, and the context ID corresponding to the context data displayed on the image display unit 208 when the session key is received are transmitted to the reference device 30. (Step S103).

  The reference device 30 receives the session key SK1, spot ID, and context ID from the target device 20, and records the received session key SK1, spot ID, and context ID in the session key database 305 in association with each other (step S104). Also, the session key SK2 transmitted from the terminal device 10 and the address of the terminal device 10 are received, and the received session key SK2 is collated with the session key SK1 stored in the session key database 305 in step S104. As a result of the collation, when a session key SK1 having a predetermined relationship with the session key SK2 (here, the relationship of SK1 = SK2 as described above) is obtained, the spot ID and context ID corresponding to the session key SK1 are stored in the session key database Read from 305 (step S106).

The reference device 30 further reads out the URL corresponding to the extracted spot ID and context ID from the content database 306 by searching (step S107), and transmits the read URL to the terminal device 10 at the address received in step S105. (Step S108).
The terminal device 10 receives the URL transmitted from the reference device 30 and displays a content access screen as shown in FIG. 14C on the display unit 109 (step S109). The content access screen includes the received URL, a message for confirming the user “Do you want to acquire content?”, Selection icons for “Yes” and “No”, and the like. Here, a case will be described in which “Yes” confirmation input is performed by the user using the cursor key of the user input unit 101 or the content request button.

Upon receiving the user input, the terminal device 10 transmits content acquisition request data to the content storage device 40 corresponding to the URL received in step S108 (step S110). At this time, the display unit 109 of the terminal device 10 displays a screen having a message “Content Accessing” as shown in FIG.
The content storage device 40 that has received the content acquisition request data extracts the content corresponding to the URL specified by the received content acquisition request data from the content database 403 and transmits it to the terminal device 10 (step S111).
The terminal device 10 receives the above content transmitted from the content storage device 40, and displays the received content on the display unit 109 using a content display screen as shown in FIG. 14E (step S112).
Thus, the distribution of the content from the content storage device 40 to the terminal device 10 is completed, and the operation of the content distribution system ends.

15A to 15E are diagrams illustrating examples of images displayed on the display unit 109 of the terminal device 10 according to the first embodiment of the present invention. FIG. 15 shows the terminal device 10 in the case where the method (2) described above, that is, the method in which the user selects the reception identification data K1 during infrared transmission is used as a method for setting the reception identification data K1. The example of a screen displayed on the display part 109 is shown.
In addition to the initial screen that displays the message “Please press the button” in FIG. 14A described above, together with the message “Please select the reception confirmation and press the button”, there are several candidates for the data for reception identification. Is displayed. When the user selects one of these candidates using a cursor key or the like and presses the infrared transmission button, the reception identification data is generated together with the generation of the session keys SK1 and SK2, and then the above-described FIG. 13 and FIG. A) to the same processing as described with reference to FIG.

FIGS. 16A to 16E are diagrams illustrating examples of images displayed on the display unit 109 of the terminal device 10 according to the first embodiment of the present invention. FIG. 16 shows the terminal device 10 when the method (3) described above, that is, the method in which the terminal device automatically selects the reception identification data K1, is used as the method for setting the reception identification data K1. The example of a screen displayed on the display part 109 is shown.
When the infrared transmission button is pressed on the initial screen on which the message “Please press the button” is displayed as in FIG. 14A, the reception identification data K1 is randomly selected along with the generation of the session keys SK1 and SK2. The corresponding reception confirmation is displayed on the display unit 109 of the terminal device 10. Thereafter, the same processing as that described with reference to FIGS. 13 and 14A to 14E is performed.

(Second Embodiment)
FIG. 17 is a configuration diagram showing an outline of a content distribution system 100b according to the second embodiment of the present invention. The second embodiment is different from the first embodiment (see FIG. 1) in that the content device 40 (40a, 40b, 40c) is connected to the terminal device 10 (10a, 10b, 10c) via the network 60. Instead, the content device 40 is directly connected to the reference device 30. Here, the reference device 30 and the content distribution device 40 are collectively referred to as a content distribution device.
The configurations of the terminal device 10, the target device 20, the reference device 30, and the content storage device 40 are substantially the same as those in the first embodiment, but the reference device 30 has a predetermined relationship between the session key SK1 and the session key SK2. When the reference device 30 determines that the content is acquired, the reference device 30 does not transmit data (URL or the like) for acquiring the content to the terminal device 10, but based on the data for the reference device 30 to acquire the content. The point of difference is that the content is read from the content storage device 40 and transmitted to the terminal device 10.

  The terminal device 10 according to the second embodiment of the present invention generates a session key SK1 and a session key generation unit 102 (first session key generation) that generates a session key SK2 having a predetermined relationship with the session key SK1. And a second session key generation unit), a reception identification data generation unit 112 that generates reception identification data K1 for confirming whether or not the session key SK1 is received by the target device 20, and the session key An infrared transmitter 110 (first transmitter) that transmits SK1 and the reception identification data K1 to the target device 20, and the session key SK2 when the reception identification data K1 is received from the target device 20 A network transmission / reception unit 111 (second transmission unit) that transmits Provided.

  The target device 20 in the second embodiment of the present invention includes a spot ID storage unit 210 (target device identification data storage unit) that stores in advance target device identification data for identifying the target device 20, and the terminal device 10. Network transmission processing for transmitting the session key SK1 and the target device identification data stored in the spot ID storage unit 210 to the reference device 30 when the session key SK1 and the reception identification data K1 are received from Unit 206 (third transmission unit) and an image display unit 208 (notification unit) that displays (notifies) that the reception identification data K1 has been received when the reception identification data K1 is received from the terminal device 10. ).

  In addition, the content distribution device including the reference device 30 and the content storage device 40 according to the second embodiment of the present invention has a content database 306 (content storage unit) that stores the target device identification data K1 and content in association with each other in advance. A session key management unit 303 (determination unit) that determines whether or not the session key SK1 transmitted from the target device 20 and the session key SK2 transmitted from the terminal device 20 have a predetermined relationship; When the session key management unit 303 determines that the session key SK1 and the session key SK2 have a predetermined relationship, content corresponding to the target device identification data transmitted from the target device 20 is stored in the content database 403 (content storage Part) Network transmission processing unit 404 to be delivered to 0 and a (content delivery unit).

As described above, according to the first or second embodiment of the present invention, two session keys SK1 and SK2 are generated by the terminal device 10, and one session key SK1 is referred to via the target device 20 as a reference device. 30, the other session key SK <b> 2 is directly transmitted to the reference device 30, and the reference device 30 collates the session keys sent through two different paths. The session keys SK1 and SK2 are generated so as not to include the unique data of the terminal device 10, and only the address is directly transmitted to the reference device 30 as the unique data of the terminal device 10. Therefore, the specific data of the terminal device 10 is not acquired by the target device 20, and the security of the terminal device 10 can be protected.
Furthermore, when the target device 20 outputs a reception confirmation to each of the plurality of terminal devices 10, each user can grasp that the request from the terminal is received by the target device 20.

  Further, when the target device 20 transmits the spot ID and the context ID to the reference device 30 and the session key can be collated, the URL corresponding to the spot ID and the context ID is transmitted to the terminal device 10. The terminal device 10 acquires content corresponding to the URL from the content storage device 40. The context ID is associated with the state of the target device 20, and by using this, different contents can be distributed for each state of the target device 20.

Further, in the communication between the terminal device 10 and the target device 20, only the session key SK1 and the reception identification data K1 are transmitted from the terminal device 10, so that the communication process is simple and the content distribution request is made in a short time. In addition, the configuration of the transmission / reception unit can be simplified.
In addition, since it is possible to select and transmit different reception identification data K1 for each terminal device from the plurality of terminal devices 10, the target device 20 displays a reception confirmation corresponding to the reception identification data K1 from each terminal. Thus, even when a plurality of terminal devices transmit infrared rays at the same time, each user can determine whether or not the transmitted infrared data is received by the target device.

As described above, the first and second embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the above-described one, and the scope of the present invention is not deviated. Various design changes can be made.
For example, in the above-described first or second embodiment, the case where a URL is used as “data for acquiring content” has been described. However, if the content can be specified, something other than the URL is used. May be used. As an example of “data for acquiring content” other than the URL, an IP (Internet Protocol) address, a file name, pointer data set uniquely, and the like can be used.

In addition, the target device 20 in the first or second embodiment of the present invention is not limited to the one provided with the image display unit 208. By providing an output device such as a lamp outside, painting, sculpture It is also possible to use a target device 20 of a type that is installed near an exhibition such as an advertisement or the like and does not display an image by itself.
Further, communication is performed between the terminal device 10 and the reference device 30, the target device 20 and the reference device 30, the terminal device 10 and the content storage device 40, and the reference device 30 and the content storage device 40 by a communication function that can be used by the computer. The type of communication function does not matter. For example, a wired connection such as Ethernet (registered trademark), RS-232C (Recommended Standard 232C), USB (Universal Serial Bus), IEEE 1394 (Institute of Electrical and Electronics Engineers 1394), IEEE 802.11a / b / g, Wireless connections such as mobile phone communication, infrared communication, Bluetooth, optical transmission, etc. may be used.
Moreover, although each said communication function can be used also for communication between the terminal device 10 and the object apparatus 20, it is suitable if it uses especially infrared communication, Bluetooth, and optical transmission.

  In the first or second embodiment described above, the user input unit 101, the session key generation unit 102, the session key conversion unit 103, the infrared transmission processing unit 104, and the network transmission processing unit 105 of the terminal device 10 in FIG. , Content request processing unit 106, network reception processing unit 107, display processing unit 108, display unit 109, infrared transmission unit 110, network transmission / reception unit 111, reception identification data generation unit 112, reception identification data conversion unit 113, Infrared receiver 201, infrared reception processor 202, data generator 203, spot database 204, status management unit 205, network transmission processor 206, output processor 207, image display unit 208, reception identification The data generation unit 209, the spot ID storage unit 210, and the reference device shown in FIG. 30 network reception processing unit 301, network transmission processing unit 302, session key management unit 303, content determination unit 304, session key database 305, content database 306, network reception processing unit 401 of content storage device 40 of FIG. 12, content The function of the processing unit 402, the content database 403, the network transmission processing unit 404 or a program for realizing a part of these functions is recorded on a computer-readable recording medium, and the program recorded on the recording medium is recorded on the computer. The content distribution system 100 may be controlled by being loaded into the system and executed. Here, the “computer system” includes an OS and hardware such as peripheral devices.

  The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” dynamically holds a program for a short time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, it is also assumed that a server that holds a program for a certain time, such as a volatile memory inside a computer system that serves as a server or client. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

It is a block diagram which shows the outline | summary of the content delivery system by the 1st Embodiment of this invention. It is a block diagram which shows the structure of the terminal device 10 in the content delivery system of FIG. It is an external view of the terminal device 10 by the 1st Embodiment of this invention. It is a block diagram which shows the structure of the target apparatus 20 of the content delivery system by the 1st Embodiment of this invention. It is a figure which shows an example of the spot database memorize | stored in the spot database 204 by the 1st Embodiment of this invention. It is an external view of the object apparatus 20 grade | etc., By the 1st Embodiment of this invention. It is a figure which shows an example of the screen display in the image display part 208 of the target apparatus 20 of FIG. 6 is a diagram illustrating an example of reception identification data displayed in a reception identification data display area 2085 of the image display unit 208 of the target device 20. FIG. It is a block diagram which shows the structure of the reference apparatus 30 of the content delivery system by the 1st Embodiment of this invention. It is a figure which shows an example of the session key database memorize | stored in the session key database 305 by the 1st Embodiment of this invention. It is a figure which shows an example of the database memorize | stored in the content database 306 by the 1st Embodiment of this invention. It is a block diagram which shows the structure of the content storage apparatus 40 of the content delivery system by the 1st Embodiment of this invention. It is a sequence diagram which shows the process of the content delivery system by the 1st Embodiment of this invention. It is a figure which shows an example of the image displayed on the display part 109 of a terminal device at the time of the process by the sequence diagram of FIG. It is a figure which shows an example of the image displayed on the display part 109 of the terminal device 10 by the 1st Embodiment of this invention. It is a figure which shows an example of the image displayed on the display part 109 of the terminal device 10 by the 1st Embodiment of this invention. It is a block diagram which shows the outline | summary of the content delivery system by the 1st Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Terminal device, 20 ... Target device, 30 ... Reference device, 40 ... Content storage device, 100a, 100b ... Content distribution system, 101 ... User input part, 102 ... Session key generation unit 103: Session key conversion unit 104: Infrared transmission processing unit 105: Network transmission processing unit 106: Content request processing unit 107: Network reception processing unit , 108 ... display processing unit, 109 ... display unit, 110 ... infrared transmission unit, 111 ... network transmission / reception unit, 112 ... data generation unit for reception identification, 113 ... for reception identification Data conversion unit, 201... Infrared reception unit, 202... Infrared reception processing unit, 203... Data generation unit, 204. ..Status management unit 206 ... Network transmission processing unit 207 ... Output processing unit 208 ... Image display unit 209 ... Reception identification data generation unit 210 ... Spot ID storage unit , 301 ... Network reception processing unit, 302 ... Network transmission processing unit, 303 ... Session key management unit, 304 ... Content determination unit, 305 ... Session key database, 306 ... Content database , 401 ... Network reception processing unit, 402 ... Content processing unit, 403 ... Content database, 404 ... Network transmission processing unit

Claims (9)

In a content distribution system comprising a terminal device, a target device, and a content distribution device,
The terminal device
A first session key generation unit for generating a first session key;
A second session key generation unit for generating a second session key having a predetermined relationship with the first session key;
A reception identification data generation unit for generating reception identification data for confirming whether or not the first session key has been received by the target device;
A first transmitter that transmits the first session key and the reception identification data to the target device;
A second transmission unit that transmits the second session key to the content distribution device;
The target device is:
A target device identification data storage unit that stores in advance target device identification data for identifying the target device;
When the first session key and the reception identification data are received from the terminal device, the content distribution includes the first session key and the target device identification data stored in the target device identification data storage unit. A third transmitter for transmitting to the device;
A notification unit for notifying that the reception identification data has been received when the reception identification data is received from the terminal device;
The content distribution device includes:
A content storage unit that stores the target device identification data and the content in association with each other;
A determination unit that determines whether or not the first session key transmitted from the target device and the second session key transmitted from the terminal device have a predetermined relationship;
When the determination unit determines that the first session key and the second session key have a predetermined relationship, content corresponding to the target device identification data transmitted from the target device is transmitted from the content storage unit. A content delivery unit that reads and delivers to the terminal device;
A content distribution system comprising: In the terminal device that communicates with the target device and the content distribution device,
A first session key generation unit for generating a first session key;
A second session key generation unit for generating a second session key having a predetermined relationship with the first session key;
A reception identification data generation unit for generating reception identification data for confirming whether or not the first session key has been received by the target device;
A first transmitter that transmits the first session key and the reception identification data to the target device;
A second transmission unit for transmitting the second session key to the content distribution device;
A terminal device comprising:   The terminal device according to claim 2, wherein the reception identification data generation unit generates the reception identification data in advance. A reception identification data selection unit that selects any one of the reception identification data based on a user operation from a plurality of reception identification data;
The terminal device according to claim 2, wherein the reception identification data generation unit generates the reception identification data selected by the reception identification data selection unit. A reception identification data determination unit that determines any reception identification data from among a plurality of reception identification data;
A reception identification data output unit for outputting the reception identification data determined by the reception identification data determination unit;
The terminal device according to claim 2, further comprising:   The terminal device according to claim 2, wherein the reception identification data generation unit generates identification data shared between the terminal device and the target device as the reception identification data.   The terminal device according to claim 2, wherein the reception identification data generation unit generates image data as the reception identification data. In the target device that communicates with the terminal device and the content distribution device,
A target device identification data storage unit that stores in advance target device identification data for identifying the target device;
When the first session key and the reception identification data are received from the terminal device, the content distribution includes the first session key and the target device identification data stored in the target device identification data storage unit. A first transmitter for transmitting to the device;
A notification unit for notifying that the reception identification data has been received when the reception identification data is received from the terminal device;
A target device comprising: In a content distribution method using a terminal device, a target device, and a content distribution device,
The terminal device
A first session key generation process for generating a first session key;
A second session key generating step of generating a second session key having a predetermined relationship with the first session key;
A reception identification data generation process for generating reception identification data for confirming whether or not the first session key has been received by the target device;
A first transmission process of transmitting the first session key and the reception identification data to the target device;
Performing a second transmission step of transmitting the second session key to the content distribution device;
The target device is:
A target device identification data storage process for storing in advance target device identification data for identifying the target device;
When the first session key and the reception identification data are received from the terminal device, the first session key and the target device identification data stored in the target device identification data storage process are stored in the content distribution device. A third transmission process to transmit;
Performing a reception identification data reception notification process for notifying that the reception identification data has been received when the reception identification data is received from the terminal device;
The content distribution device includes:
A content storage process for storing target device identification data and content in association with each other;
A determination process for determining whether or not the first session key transmitted from the target device and the second session key transmitted from the terminal device have a predetermined relationship;
When it is determined in the determination process that the first session key and the second session key have a predetermined relationship, content corresponding to target device identification data transmitted from the target device is read and the terminal device A content distribution method comprising: executing a content distribution process for distributing content to the content.

Images