JP4937021B2 - Content distribution method and communication system - Google Patents

Description

  The present invention relates to a content distribution method and a communication system.

  In recent years, with the advancement of mobile devices such as mobile phone terminals and PDA (Personal Digital Assistants) terminals and the expansion of storage size, they have been stored in personal computers and HDDs (Hard Disk Recorders) HDDs (Hard Disk Drives). Content (for example, video) is transferred to a mobile device via a removable media such as a CF (Compact Flash) card or an SD card, or transferred to a mobile device via a USB cable, It has become possible to play (view) content on mobile devices.

  By adopting the MPEG4 or H.264 format compression method as a compression method for realizing the transfer of content to the mobile device and the reproduction of the content on the mobile device, removable media of several gigabytes (GB). On the other hand, it is possible to store content having a playback time ranging from several hours to several tens of hours.

  However, HDDs installed in personal computers and HDRs have a capacity of several hundred gigabytes (GB) to several terabytes (TB), and can record content with playback times ranging from hundreds of hours to thousands of hours. In comparison, it is hard to say that content with sufficient playback time can be stored.

  Therefore, a technique for playing back content stored in a server device belonging to a home network of a mobile device using a player device belonging to a destination network where the mobile device is located is known.

With this technology, when a distribution server distributes content in a file server designated by an internal terminal to an external terminal, a malicious user cannot easily acquire the content by using a one-time URL. (Refer patent document 1).
JP 2006-268212 A

  However, in this technique, in addition to the distribution server having to manage the file data sent from the file server and the access URL for the file data, the file server distributes the file data to different external terminals. However, there is a problem that procedures for content distribution again by the internal terminal, transfer of the file data from the file server to the distribution server, and the like are necessary.

  Therefore, the present invention has been made in view of the above-described problems. The mobile device manages only a one-time URL (file data access URL), and the server device stores content (file data). Only when the content acquisition request from the player device (external terminal) is valid, the content is transferred to the player device without going through the mobile device, and the mobile device is located in the destination network. A content delivery method capable of controlling the transfer of content without increasing the processing load on the mobile device by configuring the one-time URL to be valid only when An object is to provide a communication system.

  A first feature of the present invention is a content distribution method for distributing content from a server device belonging to a home network of a mobile device to a player device belonging to a destination network of the mobile device, wherein the mobile device includes: Generating a one-time URL indicating a storage destination of the content; transmitting a content acquisition request to the one-time URL acquired by the player device from the mobile device; and the server device including the player When the content acquisition request is received from a device, the step of verifying the one-time URL; and when the server device determines that the one-time URL is valid, without passing through the mobile device, On the player device And, and summarized in that a step of transferring the content.

  A second feature of the present invention is a communication system configured to deliver content from a server device belonging to a home network of a mobile device to a player device belonging to a destination network of the mobile device, The mobile device is configured to generate a one-time URL indicating a storage destination of the content, and the player device transmits a content acquisition request to the one-time URL acquired from the mobile device. When the server device receives the content acquisition request from the player device, the server device verifies the one-time URL and determines that the one-time URL is valid. Play without going through The device, and summarized in that is configured to transfer the content.

  In the second aspect of the present invention, the mobile device uses the key shared with the server device to identify the content and the identification information of the mobile device or a user who uses the mobile device. And the server device may be configured to verify the one-time URL using the key.

  In the second aspect of the present invention, the mobile device is configured to transmit a predetermined signal at a predetermined interval to the server device when the mobile device is located in the destination network. When the server device receives the predetermined signal, the server device verifies the one-time URL and transfers the content, and when the server device does not receive the predetermined signal, the mobile device is located in the destination network. It may be configured that it is determined that it is no longer performed, the verification of the one-time URL is stopped, and the transfer of the content to the player device is stopped.

  In the second aspect of the present invention, the server device determines that the mobile device is located in the destination network in response to a communication start notification received from the mobile device, and verifies the one-time URL. And the server device is configured to initiate transfer of the content to the player device, and the server device is located in the destination network in response to a movement notification received from the mobile device. It may be configured that it is determined that it has run out, the verification of the one-time URL is stopped, and the transfer of the content to the player device is stopped.

  In the second aspect of the present invention, when the server device determines that the one-time URL is valid in response to the content acquisition request from the player device, the server device sends a one-time message to the mobile device. The mobile device may be configured to notify a URL update request, and the mobile device may be configured to update a counter value included in the one-time URL in response to the one-time URL update request. .

  In the second aspect of the present invention, the mobile device is configured to update a counter value included in the one-time URL at a predetermined interval, and the predetermined interval includes the one-time URL acquisition request. It may be determined according to the reception frequency of.

  In the second aspect of the present invention, the player device is located in the destination network when a predetermined period has elapsed after acquiring the one-time URL from the mobile device. The content transfer request may be transmitted to the server device only when it can be confirmed.

  In the second feature of the present invention, the server device is configured to determine that the one-time URL is not valid when it is determined that a counter value included in the one-time URL is equal to or greater than a predetermined threshold. May be.

  In the second aspect of the present invention, the server device is configured to determine that the one-time URL is not valid when it is determined that the validity period included in the one-time URL has elapsed. It may be.

  As described above, according to the present invention, the mobile device manages only the one-time URL (file data access URL), the server device stores the content (file data), and the player device (external terminal). ) Only when the content acquisition request is valid from the mobile device without passing through the mobile device, and only when the mobile device is located in the destination network. To provide a content distribution method and communication system capable of controlling the transfer of content without increasing the processing load on the mobile device by configuring the one-time URL to be valid. Can do.

(Configuration of communication system according to first embodiment of the present invention)
The configuration of the communication system according to the first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the communication system according to the present embodiment includes a mobile device 10, a server device 20, a player device 30, and a relay server device 500.

  In the example of FIG. 1, the server device 20 and the relay server device 500 belong to the home network 50 of the mobile device 10. In the example of FIG. 1, the mobile device 10 is located in the movement destination network 40, and the player device 30 belongs to the movement destination network 40.

  Here, the relay server device 500 establishes connection # 1 with the mobile device 10 via a BBR (Broad Band Router) 510 belonging to the home network 50, the Internet 60, and a BBR 410 belonging to the destination network 40. It is configured as follows.

  The relay server device 500 is configured to establish connection # 3 with the player device 30 via a BBR (Broad Band Router) 510, the Internet 60, and the BBR 410.

  In addition, when there are a plurality of server devices 20 in the home network 50, the relay server device 500 manages content and a content list (described later) stored in the plurality of server devices 20, and the plurality of servers Instead of the device 20, communication is performed between the mobile device 10 and the player device 30.

  Hereinafter, in the present embodiment, an example in which the relay server device 500 acts as a proxy for a plurality of server devices 20 belonging to the home network 50 will be described. However, in the present invention, the relay server device 500 includes a plurality of server devices 20. It can be applied to an example in which no proxy is used.

  Therefore, the term “server device” in this specification includes both the server device 20 and the relay server device 500.

  The mobile device 10 establishes connection # 2 with the player device 30 by wireless LAN, near field wireless communication (such as Bluetooth (registered trademark) or infrared communication), or wired communication (such as USB (Universal Serial Bus) cable connection). Configured to establish.

  A DDNS (Dynamic Domain Name Server) 70 is connected to the Internet 60. The DDNS 70 is configured to manage a host name and a dynamic global IP address in association with each other.

  If the BBR 510 of the home network 50 has a fixed IP address and acquires a domain name, the above-described DDNS 70 is replaced with DNS (Domain Name Server).

  Hereinafter, in the present embodiment, a case will be described in which communication performed between the mobile device 10, the server device 20, and the player device 30 via the Internet 60 is compliant with IP. However, such communication should be compliant. The communication protocol is not limited to IP.

  In the present embodiment, the mobile device 10, the server device 20, and the player device 30 may be PCs (Personal Computers) that perform communication according to IP, PDA (Personal Digital Assistants) terminals that perform communication according to IP, It may be a mobile phone terminal.

  That is, the mobile device 10, the server device 20, and the player device 30 may be any computer device as long as it has a function of performing communication according to a predetermined communication protocol.

  Further, the mobile device 10 may communicate between the relay server device 500 and the field via a mobile communication network in addition to communication via the Internet 60 and the BBR 410. In other words, in the present embodiment, the mobile device 10 only needs to be able to transmit and receive information to and from the relay server device via the communication means included in the mobile device 10.

  FIG. 2 shows a hardware configuration of the mobile device 10. Since the hardware configuration of the mobile device 10 is similar to the hardware configuration of a general computer apparatus, only the hardware configuration related to the present invention will be described with reference to FIG.

  The CPU 101 is configured to control each part of the hardware configuration of the mobile device 10 by executing a program stored in the storage unit 105.

  The storage unit 105 includes a RAM (Random Access Memory) 102 and a ROM (Read Only Memory) 103.

  The RAM 102 is configured to temporarily store data used by the CPU 101.

  The ROM 103 is configured to store a program 100A described later with respect to the CPU 101.

  The operation unit 104 includes a keyboard, a mouse, and the like, and is configured to notify the CPU 101 of an operation command corresponding to a user operation.

  The communication module 106 is configured to perform communication between the server device 20 or the relay server device 500 and the player device 30.

  The security module 107 is configured to generate a hash value to be given to a one-time URL (Uniform Resource Locator) indicating a storage destination of specific content. The one-time URL is updated at a predetermined timing.

  The removable medium 108 is configured to store content acquired from the server device 20 (or the relay server device 500) and a content list.

  Next, functions of the mobile device 10 according to the present embodiment will be described with reference to FIG. As shown in FIG. 3, the function of the mobile device 10 according to the present embodiment is realized by the CPU 101 executing a program 100A.

  As shown in FIG. 3, the functions of the mobile device 10 according to the present embodiment include a virtual server device activation unit 11, a server device information acquisition unit 11 </ b> A, a content list transfer request transmission unit 12, and a content list transmission unit 13. The content list acquisition unit 13A and the movement notification transmission unit 14 are provided.

  The server device information acquisition unit 11A transmits a server device information confirmation request via the communication module 106 in response to a user operation using the operation unit 104, whereby the server device information acquisition unit 11A receives the server device information acquisition request from the server device 20 (or the relay server device 500). The server device information indicating one or a plurality of server devices 20 belonging to the home network 50 is acquired.

  The virtual server device activation unit 11 is configured to provide some functions of the server device 20 to the player device 30.

  For example, the virtual server device activation unit 11 is configured to provide the above-described server device information to the player device 30 in response to a user operation using the operation unit 104.

  The content list transfer request transmission unit 12 transmits the content list transfer request received from the player device 30 via the communication module 106 to the server device 20 (or the relay server device 500) via the communication module 106. It is configured.

  Here, the content list transfer request is a request to transfer a content list related to content that is stored in the server device 20 selected by the player device 30 and can be provided to the player device 30. .

  The content list generation unit 13A is configured to acquire the above-described content list from the server device 20 via the communication module 106 and store it in the storage unit 105 or the removable medium 108.

  Specifically, the content list associates identification information (for example, content name) of each content with a one-time URL for storing the content.

  Here, the content list generation unit 13A is configured to generate the above-mentioned one-time URL using a key (common key) shared with the server device 20. FIG. 4 shows an example of the one-time URL generated by the content list generation unit 13A.

  As shown in FIG. 4, the one-time URL for specific content includes address information (for example, a global IP address) of the server device 20 that stores the specific content, identification information A of the specific content, and the mobile device 10. Identification information B of the user who uses the mobile device 10, identification information C of the mobile device 10, the global IP address D of the destination network 40 in which the mobile device 10 is located, the validity period E of the one-time URL, and a counter It includes a value F and a hash value G.

  The one-time URL does not need to include all the information elements described above, and may include at least the address information of the server device described above and the identification information A of the specific content described above.

  Further, the content list generation unit 13A is configured to update the counter value included in the above-mentioned one-time URL in response to the one-time URL update request transmitted from the server device 20.

  That is, when the specific content is reproduced by the player device 30, the content list generation unit 13A is configured to update the one-time URL for the specific content (viewed content).

  In addition, the content list generation unit 13A is configured to update the counter value included in the above-mentioned one-time URL at a predetermined interval.

  That is, the content list generation unit 13A is configured to periodically update the one-time URL for content (unviewed content) that has not been reproduced by the player device 30.

  Here, the above-described predetermined interval may be configured to be determined by the reception frequency of the one-time URL acquisition request from the server device 20.

  For example, when the content list generation unit 13A has a high reception frequency of one-time URL acquisition requests from the server device 20 within a predetermined period in order to reduce the processing load of the mobile device 10, the above-described one-time URL update interval It may be configured to lengthen.

  On the other hand, in consideration of security, the content list generation unit 13A is configured to shorten the above-described one-time URL update interval when the reception frequency of the one-time URL acquisition request from the server device 20 is low within a predetermined period. May be.

  The content list transmission unit 13 extracts the content list including the above one-time URL from the removable medium 108 or the storage unit 105 when the mobile device 10 is located in the movement destination network 40, and the communication module 106. The content list is transmitted to the player device 30 via

  The movement notification transmission unit 14 notifies the server device 20 (or the relay server device 500) via the communication module 106 when the mobile device 10 is no longer in the movement destination network 40. Is configured to transmit a movement notification for

  Here, the movement notification transmission unit 14 transmits the above-described movement notification to the server device 20 (or relay server) without passing through the mobile device 10 to the server device 20 (or relay server device 500). The device 500) can instruct the player device 30 to stop transmitting content.

  In addition, the movement notification transmission unit 14 may be configured to transmit a predetermined signal to the server device 20 at a predetermined interval when located in a specific destination network.

  Here, the movement notification transmission unit 14 is configured to stop transmission of the predetermined signal when the movement notification transmission unit 14 is no longer in the specific movement destination network.

  FIG. 5 shows the hardware configuration of the server device 20 (or the relay server device 500). Since the hardware configuration of the server device 20 (or the relay server device 500) is the same as the hardware configuration of the mobile device 10, only the difference between them will be described with reference to FIG.

  The HDD 208 is configured to store the above-described content and content list. Note that the HDD 208 provided in the relay server device 500 is configured to store content and a content list stored in each server device 20.

  The security module 207 is configured to verify whether or not the hash value included in the one-time URL is valid.

  Next, functions of the server device 20 according to the present embodiment will be described with reference to FIG. As shown in FIG. 6, the function of the server device 20 according to the present embodiment is realized by the CPU 201 executing the program 100B.

  As shown in FIG. 6, the function of the server device 20 according to this embodiment includes a server device information transmission unit 21, a content list transmission unit 22, a content transmission unit 23, and a movement notification reception unit 24. Yes.

  In response to the server device information confirmation request from the mobile device 10, the server device information transmission unit 21 sends the server device 20 (or one belonging to the home network 50) to the mobile device 10 via the communication module 206. Alternatively, server device information indicating a plurality of server devices 20) is transmitted.

  The content list transmission unit 22 is stored in the server device 20 (or the relay server device 500) for the mobile device 10 via the communication module 206 in response to a content list transfer request from the mobile device 10. The content list related to the content that can be provided to the player device 30 is transmitted.

  When the content transmission unit 23 receives a content transfer request from the player device 30 and determines that the mobile device 10 is located in the movement-destination network 40, the content transmission unit 23 sends the mobile device 10 a mobile The content is transferred without going through the device 10.

  Further, when the content transmitting unit 23 determines that the mobile device 10 is no longer in the movement destination network 40 while transferring the content to the player device 30, the content transmitting unit 23 stops the transfer of the content to the player device 30. Is configured to do.

  Further, when the content transmission unit 23 receives a content acquisition request from the player device 30, the content transmission unit 23 cooperates with the security module 207 to verify the one-time URL that is the destination of the content acquisition request. .

  The content transmitting unit 23 is configured to transfer the content related to the content acquisition request to the player device 30 without going through the mobile device 10 when determining that the one-time URL is valid. Has been.

  Specifically, the security module 207 uses a key (common key) shared with the mobile device 10 to verify whether the hash value included in the above one-time URL is valid, The content transmission unit 23 determines whether or not the one-time URL is valid based on the verification result.

  Further, the content transmitting unit 23 is configured to determine that the one-time URL is not valid when it is determined that the counter value included in the one-time URL is equal to or greater than a predetermined threshold.

  In addition, the content transmission unit 23 is configured to determine that the one-time URL is not valid when it is determined that the valid period included in the one-time URL has elapsed.

  Here, when the content transmission unit 23 determines that the one-time URL is valid in response to the content acquisition request from the player device 30, that is, when the content is transmitted to the player device 30, the mobile device 10 is configured to notify a one-time URL update request.

  Further, the content transmission unit 23 determines that the mobile device 19 is in the movement destination network 40 in response to the communication start notification received from the mobile device 10, and the movement notification receiving unit 24 sends a movement notification from the mobile device 10. When received, the mobile device 10 may be configured to determine that it no longer exists in the destination network 40.

  In addition, when the content transmission unit 23 receives the predetermined signal from the mobile device 10, the content transmission unit 23 determines that the mobile device 10 is located in the destination network 40, and the mobile device 10 receives the predetermined signal from the mobile device 10. The mobile device 10 may be configured to determine that the mobile device 10 is no longer in the destination network 40 when the signal is not received.

  The movement notification receiving unit 24 is configured to receive the above movement notification from the mobile device 10 via the communication module 206.

  Further, the player device 30 is configured to transmit a content acquisition request for the desired content to the one-time URL acquired from the mobile device 10 in response to a user operation.

  In addition, the player device 30 can confirm that the mobile device 10 is located in the movement destination network 40 when a predetermined period has elapsed after obtaining the one-time URL from the mobile device 10. The content transfer request for the desired content is transmitted to the server device 20 only when the request is received.

  Here, if the player device 30 cannot confirm that the mobile device 10 is located in the destination network 40, the player device 30 sends a content transfer request for the desired content to the server device 20. It is configured not to send.

(Operation of the communication system according to the first embodiment of the present invention)
With reference to FIG. 7, the operation of the communication system according to the first embodiment of the present invention will be described.

  As shown in FIG. 7, in step S1001, the mobile device 10 sends a server device information confirmation request for confirming one or more server devices 20 belonging to the home network 50 of the mobile device 10 to each server device 20. (Or relay server device 500).

  In step S1002, each server device 20 (or relay server device 500) selects the server device 20 (or one or more server devices 20 belonging to the home network 50) in response to the server device information confirmation request. The server device information shown is transmitted to the mobile device 10.

  Here, each server device 20 (or relay server device 500) transmits a common key for generating a hash value included in the one-time URL generated by the mobile device 10 together with the server device information described above. It may be configured.

  The common key may be shared between the mobile device 10 and the server device 20 prior to step S1001.

  The mobile device 10 is activated as a virtual server device in step S1003, and transmits the received server device information to the player device 30 in step S1004.

  In step S1005, the player device 30 selects one or a plurality of server devices 20 from the server devices 20 included in the server device information in accordance with a user operation, and stores them in the selected server device 20 in step S1006. A content transfer request for requesting to transfer a content list relating to the content being transmitted is transmitted to the mobile device 10.

  In step S1007, the mobile device 10 transmits the received content transfer request to the selected server device 20 (or relay server device 500).

  In step S <b> 1008, the server device 20 (or the relay server device 500) transmits a content list related to the content stored in the server device 20 to the mobile device 10.

  The server device 20 may be configured to transmit the above-described common key together with the content list in step S1008 instead of transmitting in step S1002.

  The content list includes identification information of one or more contents that can be provided to the player device 30 and address information (for example, a global IP address) of the server device 20 in which the contents are stored. Is included.

  In step S1008B, the mobile device 10 generates a one-time URL for the content included in the received content list, and associates the content identification information with the one-time URL in the content list.

  Specifically, the mobile device 10 includes the address information of the server device 20 included in the content list, identification information (file name, etc.) of the content, identification information of the mobile device 10, and identification of the user of the mobile device 10. By combining the information, the IP address of the destination network 40, the validity period of the one-time URL, the counter value, and the hash value generated for these pieces of information using a common key, the one-time URL Is generated.

  In step S <b> 1009, the mobile device 10 transmits the received content list to the player device 30.

  In step S1010, the player device 30 selects a desired content from the content included in the received content list in response to a user operation. In step S1011 the player device 30 addresses the one-time URL associated with the content. Then, a content transfer request for requesting transfer of the content is transmitted to the server device 20 (or the relay server device 500).

  Here, when the address information of the server device 20 included in the one-time URL is described by the domain name, the player device 30 uses the address resolution processing by the DDNS 70 to correspond to the global IP corresponding to the one-time URL. An address may be acquired.

  In step S1011B, the server device 20 (or the relay server device 500) receives a hash value included in the one-time URL that is the destination of the received content transfer request, and an information element other than the hash value included in the one-time URL. The one-time URL is verified by comparing the hash value generated using the above-described shared key.

  In step S1012, the server device 20 (or relay server device 500) determines that the received one-time URL is valid, that is, it can accept the received content transfer request. In this case, the content is transmitted to the player device 30 without going through the mobile device 10.

  In step S1012B, the server device 20 (or the relay server device 500) notifies the mobile device 10 of a one-time URL update request for requesting to update the one-time URL necessary for acquiring the content. To do. Here, the one-time URL update request includes at least identification information of the content.

  Thereafter, when the mobile device 10 no longer exists in the destination network (step S1013), in step S1014, the mobile device 10 transmits a movement notification indicating that to the server device 20 (or the relay server device 500). .

  In step S1015, the server device 20 (or relay server device 500) stops the transfer of content to the player device 30 in response to the received movement notification.

(Operations and effects of the communication system according to the first embodiment of the present invention)
According to the communication system according to the first embodiment of the present invention, the mobile device 10 manages only the one-time URL, the server device 20 (or the relay server device 500) stores the content, and the player device Only when the content acquisition request from 30 is valid, the content is transferred to the player device 30 without going through the mobile device 10, and the mobile device 10 is located in the destination network 40. By configuring so that the one-time URL is valid only when the mobile device 10 is present, the transfer of the content can be controlled without increasing the processing load on the mobile device 10.

(Communication system according to the second embodiment of the present invention)
Next, with reference to FIG. 8, the communication system according to the second embodiment of the present invention will be described mainly with respect to differences from the communication system according to the first embodiment described above.

  Here, with reference to FIG. 8, the operation of the communication system according to the present embodiment will be described. The operations in steps S2001 to S2009 shown in FIG. 8 are the same as the operations in steps S1001 to S1009 shown in FIG.

  If the player device 30 determines in step S2010 that the predetermined period has elapsed since the acquisition of the content list in step S2009, the player device 30 determines that the mobile device 10 has moved to the destination network in step S2011. 40, a virtual server location confirmation request for confirming whether or not the customer is located is transmitted.

  In step S2012, when the mobile device 10 is in the movement destination network 40, the mobile device 10 returns a virtual server location response to the received virtual server location confirmation request.

  The subsequent operations in steps S2013 to S2016 are the same as the operations in steps S1011 to S1012B shown in FIG.

(Communication system according to the third embodiment of the present invention)
Next, with reference to FIG. 9, the communication system according to the third embodiment of the present invention will be described mainly with respect to differences from the communication system according to the above-described first embodiment.

  Here, with reference to FIG. 9, the operation of the communication system according to the present embodiment will be described. The operations in steps S3001 to S3010 shown in FIG. 9 are the same as the operations in steps S1001 to S1009 shown in FIG.

  In step S3011, the player device 30 transmits a content list transfer request to the mobile device 10 again when it is determined that a predetermined period has elapsed since the content list was acquired in step S3010.

  In step S3012, the mobile device 10 transmits a content difference confirmation requesting the server device 20 (or the relay server device 500) to transmit difference information from the previously received content list.

  In step S3013, the server device 20 (or the relay server device 500) transmits difference information (content difference list) from the previously received content list to the mobile device 10.

  In step S3014, the mobile device 10 updates the one-time URL for the changed content based on the received content difference list, and transmits the content list including the updated one-time URL to the player device 30.

(Communication system according to the fourth embodiment of the present invention)
Next, with reference to FIG. 10, a communication system according to the fourth embodiment of the present invention will be described mainly with respect to differences from the communication system according to the third embodiment described above.

  Here, with reference to FIG. 10, the operation of the communication system according to the present embodiment will be described. The operations in steps S4001 to S4010 shown in FIG. 10 are the same as the operations in steps S3001 to S3010 shown in FIG.

  Here, if the mobile device 10 determines that the predetermined period has elapsed since the acquisition of the content list in step S4008, even if the mobile device 10 has not received the content list transfer request from the player device 30, step S4012. The above-described content difference confirmation is transmitted to the server device 20 (or the relay server device 500).

  Further, the mobile device 20 is configured to update the one-time URL in step S4014 when notified in step S4013 that a change such as addition, deletion, or modification has been added to the content of the server device 20. May be. At this time, the mobile device 10 may not transmit the content list difference confirmation in step S4012.

  The subsequent operations in steps S4013 to S4015 are the same as the operations in steps S3013 to S3015 shown in FIG.

(Modification 1)
A first modification of the present invention will be described with reference to FIG. As shown in FIG. 11, the communication system according to the present modification includes a provider 80 connected to the Internet 60 in addition to the configuration shown in FIG.

  In this modified example, communication between the home network 50 and the destination network 50 is performed through the provider 80.

  Therefore, the provider 80 can manage the common key shared with the server device (or the relay server device 500). In the above-described embodiment, the server device (or the relay server device 500) The verification process of the one-time URL that has been performed can also be performed.

  Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

1 is an overall configuration diagram of a communication system according to a first embodiment of the present invention. It is a hardware block diagram of the mobile device which concerns on the 1st Embodiment of this invention. It is a software block diagram of the mobile device which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the one-time URL produced | generated by the mobile device which concerns on the 1st Embodiment of this invention. It is a hardware block diagram of the server device which concerns on the 1st Embodiment of this invention. It is a software block diagram of the server device which concerns on the 1st Embodiment of this invention. It is a sequence diagram which shows operation | movement of the communication system which concerns on the 1st Embodiment of this invention. It is a sequence diagram which shows operation | movement of the communication system which concerns on the 2nd Embodiment of this invention. It is a sequence diagram which shows operation | movement of the communication system which concerns on the 3rd Embodiment of this invention. It is a sequence diagram which shows operation | movement of the communication system which concerns on the 4th Embodiment of this invention. It is a whole block diagram of the communication system which concerns on the example 1 of a change of this invention.

Explanation of symbols

10 ... Mobile device 101, 201 ... CPU
102, 202 ... RAM
103, 203 ... ROM
104, 204 ... operation units 105, 205 ... storage units 106, 206 ... communication modules 107, 207 ... security module 108 ... removable media 11 ... virtual server device activation unit 11A ... server device information acquisition unit 12 ... content list transfer request transmission unit 13A ... Content list generation unit 13 ... Content list transmission unit 14 ... Movement notification transmission unit 20 ... Server device 208 ... HDD
21 ... Server device information transmission unit 22 ... Content list transmission unit 23 ... Content transmission unit 24 ... Movement notification reception unit 30 ... Player device 40 ... Destination network 410, 510 ... BBR
50 ... Home network 500 ... Relay server device 60 ... Internet 70 ... DDNS

Claims (10)

A content distribution method for distributing content from a server device belonging to a home network of a mobile device to a player device belonging to a destination network of the mobile device,
The mobile device generating a one-time URL indicating a storage location of the content;
The player device sending a content acquisition request to the one-time URL acquired from the mobile device;
Verifying the one-time URL when the server device receives the content acquisition request from the player device;
Transferring the content to the player device without going through the mobile device when the server device determines that the one-time URL is valid;
A step of transmitting a predetermined signal at predetermined intervals to the server device when the mobile device is located in the destination network;
When the server device receives the predetermined signal, the one-time URL is verified and the content is transferred. When the server device does not receive the predetermined signal, the mobile device is present in the destination network. Determining that it is no longer in service, stopping verification of the one-time URL, and stopping transfer of the content to the player device;
Content distribution method and having a.   A content distribution method for distributing content from a server device belonging to a home network of a mobile device to a player device belonging to a destination network of the mobile device,
  The mobile device generating a one-time URL indicating a storage location of the content;
  The player device sending a content acquisition request to the one-time URL acquired from the mobile device;
  Verifying the one-time URL when the server device receives the content acquisition request from the player device;
  Transferring the content to the player device without going through the mobile device when the server device determines that the one-time URL is valid;
  In response to the communication start notification received from the mobile device, the server device determines that the mobile device is in the destination network, starts verification of the one-time URL, and the content for the player device Starting the transfer of
  In response to the movement notification received from the mobile device, the server device determines that the mobile device is no longer in the destination network, stops verifying the one-time URL, and The process of stopping the transfer of content and
A content distribution method comprising: A communication system configured to deliver content from a server device belonging to a home network of a mobile device to a player device belonging to a destination network of the mobile device,
The mobile device is configured to generate a one-time URL indicating a storage location of the content;
The player device is configured to send a content acquisition request to the one-time URL acquired from the mobile device;
When the server device receives the content acquisition request from the player device, the server device verifies the one-time URL, and determines that the one-time URL is valid without passing through the mobile device. Configured to transfer the content to a player device ;
The mobile device is configured to transmit a predetermined signal at predetermined intervals to the server device when the mobile device is located in the destination network.
When the server device receives the predetermined signal, the server device verifies the one-time URL and transfers the content. When the server device does not receive the predetermined signal, the server device is present in the destination network. A communication system, wherein the communication system is configured to determine that it is no longer in service, stop verification of the one-time URL, and stop transfer of the content to the player device .   A communication system configured to deliver content from a server device belonging to a home network of a mobile device to a player device belonging to a destination network of the mobile device,
  The mobile device is configured to generate a one-time URL indicating a storage location of the content;
  The player device is configured to send a content acquisition request to the one-time URL acquired from the mobile device;
  When the server device receives the content acquisition request from the player device, the server device verifies the one-time URL, and determines that the one-time URL is valid without passing through the mobile device. Configured to transfer the content to a player device;
  In response to the communication start notification received from the mobile device, the server device determines that the mobile device is located in the destination network, starts verification of the one-time URL, and the content for the player device Configured to initiate the transfer of
  In response to the movement notification received from the mobile device, the server device determines that the mobile device is no longer in the destination network, stops verifying the one-time URL, and A communication system configured to stop transfer of content. The mobile device includes at least the identification information of the content and the identification information of the mobile device or the identification information of a user who uses the mobile device, using a key shared with the server device. It is configured to generate a time URL,
The communication system according to claim 3 or 4 , wherein the server device is configured to verify the one-time URL using the key. The server device is configured to notify the mobile device of a one-time URL update request when the server device determines that the one-time URL is valid in response to the content acquisition request from the player device. Has been
The mobile device, in response to said one-time URL update request, any one of claims 3 to 5, characterized in that it is configured to update the counter value included in the one-time URL The communication system according to 1. The mobile device is configured to update a counter value included in the one-time URL at predetermined intervals;
The communication system according to claim 6, wherein the predetermined interval is determined by a reception frequency of the one-time URL acquisition request. When the player device is able to confirm that the mobile device is located in the destination network when a predetermined period has elapsed after obtaining the one-time URL from the mobile device The communication system according to claim 3 , wherein the content transfer request is transmitted only to the server device. The server device is configured to determine that the one-time URL is not valid when it is determined that a counter value included in the one-time URL is equal to or greater than a predetermined threshold. Item 9. The communication system according to any one of Items 3 to 8 . The server device is configured to determine that the one-time URL is not valid when it is determined that an effective period included in the one-time URL has elapsed. The communication system according to any one of 3 to 9 .

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