JP2007243696A - Communication terminal, distribution server, content distribution system, and content distribution method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To distribute a content while securing power needed in receiving the content at a communication terminal. <P>SOLUTION: The content distribution server 20 includes: a start notification receiving part 212 for receiving a start notification which is transmitted by a portable telephone set 10 and indicates that power charge starts in the portable telephone set 10 via a network 30; a distribution determination part 213 for determining on the basis of the start notification received by the start notification receiving part 212 whether or not content distribution to the portable telephone set 10 is needed; and a distribution part 214 for distributing the content to the portable telephone 10 via the network 30 on the basis of the determination made by the distribution determination part 213. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

  Conventionally, as a technology related to content distribution, a push-type content distribution system is known in which a distribution server transmits content to a communication terminal even if the communication terminal does not request the content from the distribution server (Patent Documents below) 1).

In addition, as a technique related to a communication method in a communication terminal, it is disclosed that data communication can be performed with another information terminal via a charger even when the communication terminal is being charged ( See Patent Document 2 below). In addition, it is also disclosed that the charging state of the handset constituting the cordless telephone device can be identified, and the incoming call processing, the receiving state setting and the wireless communication setting between the base handset can be performed according to the charging state. (See Patent Document 3 below).
JP 2005-242399 A Japanese Patent Laid-Open No. 10-285254 JP-A-7-303129

  However, in the push-type content distribution as described in Patent Document 1, the communication terminal consumes power to receive the content distributed from the distribution server, so the content is received at the communication terminal during the content distribution. There may be a phenomenon that sometimes the required power cannot be secured and the content distribution is interrupted. Specifically, such a phenomenon tends to occur when the remaining charge amount of the communication terminal is small before the content distribution or when the data amount of the distributed content is large.

  The device described in Patent Document 2 performs data communication with other information terminals via a connector of a charger, and the device described in Patent Document 3 is used for incoming processing of a cordless telephone device, setting of a reception state, and This is for setting wireless communication between the master and slave units. Therefore, neither of them focuses on securing the power consumed during content distribution.

  Accordingly, the present invention has been made in view of the above problems, and a communication terminal, a distribution server, a content distribution system, and a content distribution capable of performing content distribution while ensuring the power required for content reception at the communication terminal. It aims to provide a method.

  In order to solve the above-described problem, a communication terminal according to the present invention is a communication terminal that receives content distributed from a distribution server via a network, and detects whether charging has started or not. And a start notification transmission unit that transmits a start notification indicating that charging has been started to the distribution server via the network when the charging start detection unit detects that the charging has started. Content receiving means for receiving the content distributed from the distribution server in response to the start notification by the means via the network is provided.

  According to such a communication terminal, when it is detected that charging of the communication terminal is started, a start notification is transmitted from the communication terminal to the distribution server via the network, and the start notification is transmitted by the distribution server. The content distributed according to is received by the communication terminal. In this way, by starting the content distribution to the communication terminal after the communication terminal starts charging, the communication terminal can receive the content while securing the power required when receiving the content.

  Further, in the communication terminal of the present invention, charging is interrupted when it is detected by the charging interruption detecting means that the charging interruption is detected whether charging is interrupted, and charging interruption detecting means. An interruption notification transmitting unit that transmits an interruption notification indicating the interruption to the distribution server via the network, and a reception interruption unit that interrupts the process of receiving the content via the network according to the interruption notification transmitted by the interruption notification transmitting unit; It is suitable that it is further provided with.

  According to such a communication terminal, when it is detected that charging of the communication terminal is interrupted after content distribution from the distribution server to the communication terminal is started, an interruption notification is transmitted from the communication terminal via the network. In response to the interruption notification, the content reception of the communication terminal is interrupted. In this way, by executing content distribution from the distribution server to the communication terminal only during the charging period of the communication terminal, the communication terminal can receive content without reducing its own charged power. it can. As a result, the communication terminal can receive the content while more effectively securing the power required when receiving the content.

  The distribution server of the present invention is a distribution server that distributes content to a communication terminal via a network, and transmits a start notification transmitted from the communication terminal indicating that charging has started in the communication terminal. On the basis of the determination by the distribution determination unit, the distribution determination unit for determining whether or not the content distribution to the communication terminal is necessary based on the start notification received by the start notification reception unit And distribution means for distributing content to the communication terminal via the network.

  According to such a distribution server, the start notification transmitted from the communication terminal is received by the distribution server, the necessity of content distribution is determined based on the start notification, and the content is determined based on the start determination. Delivered to. In this way, by starting the content distribution to the communication terminal after the communication terminal starts charging, the communication terminal can receive the content while securing the power required when receiving the content.

  Further, in the distribution server of the present invention, the interruption notification receiving means for receiving the interruption notification transmitted from the communication terminal and indicating that charging has been interrupted at the communication terminal is received by the interruption notification receiving means. It is preferable that the apparatus further comprises distribution interruption means for interrupting distribution of content to the communication terminal via the network based on the received interruption notification.

  According to such a distribution server, when charging of the communication terminal is interrupted after content distribution from the distribution server to the communication terminal is started, an interruption notification transmitted from the communication terminal is received by the distribution server. Then, the distribution of the content to the communication terminal is interrupted based on the interruption notification. In this way, by executing content distribution from the distribution server to the communication terminal only during the charging period of the communication terminal, the communication terminal can receive content without reducing its own charged power. it can. As a result, the communication terminal can receive the content while more effectively securing the power required when receiving the content.

  A content distribution system according to the present invention includes the communication terminal according to claim 1 or claim 2 and the distribution server according to claim 3 or claim 4.

  The content distribution method of the present invention is a content distribution method in which a distribution server distributes content to a communication terminal via a network, and (1) the communication terminal determines whether charging of the communication terminal has started. A charging start detection step to detect, and (2) when a communication terminal detects that charging has been started in the charging start detection step, a start notification indicating that charging of the communication terminal has started, A start notification transmission step for transmitting via the network, (3) a start notification receiving step for the distribution server to receive the start notification transmitted in the start notification transmission step via the network, and (4) a distribution server for the start A distribution determination step of determining whether or not content distribution to the communication terminal is necessary based on the start notification received in the notification reception step; (5) A distribution server that distributes the content to the communication terminal via the network based on the determination in the distribution determination step; and (6) the communication terminal receives the content distributed in the distribution step via the network. And a content receiving step.

  According to such a content distribution system or content distribution method, when it is detected that charging of the communication terminal is started, a start notification is transmitted from the communication terminal to the distribution server via the network, and the distribution server In step (b), the necessity of content distribution is determined based on the start notification, and the content distributed based on the start determination is received by the communication terminal. In this way, by starting the content distribution to the communication terminal after the communication terminal starts charging, the communication terminal can receive the content while securing the power required when receiving the content.

  The content distribution method of the present invention includes (1) a charge interruption detection step in which the communication terminal detects whether or not charging of the communication terminal is interrupted, and (2) the communication terminal is charged in the charge interruption detection step. An interruption notification transmission step for transmitting an interruption notification indicating that the charging has been interrupted when it is detected that the charging is interrupted, and (3) the communication terminal is transmitted in the interruption notification transmission step. A reception interruption step of interrupting the process of receiving the content via the network in response to the interruption notification, and (4) an interruption notification where the distribution server receives the interruption notification transmitted in the interruption notification transmission step via the network. A receiving step, and (5) the distribution server receives the interruption notification received in the interruption notification receiving step via the network. It is preferable to further comprising a suspend delivery interrupting step delivery of content to signal terminals.

  According to such a content distribution system or content distribution method, when it is detected that the charging of the communication terminal is interrupted after the content distribution from the distribution server to the communication terminal is started, the interruption notification is transmitted to the communication terminal. The content is transmitted from the terminal to the distribution server, content reception at the communication terminal is interrupted according to the interruption notification, and content distribution is interrupted at the distribution server based on the interruption notification. In this way, by executing content distribution from the distribution server to the communication terminal only during the charging period of the communication terminal, the communication terminal can receive content without reducing its own charged power. it can. As a result, the communication terminal can receive the content while more effectively securing the power required when receiving the content.

  According to the communication terminal, the distribution server, the content distribution system, and the content distribution method of the present invention, it is possible to perform content distribution while ensuring the power required for content reception in the communication terminal.

  Hereinafter, preferred embodiments of a communication terminal, a distribution server, a content distribution system, and a content distribution method according to the present invention will be described with reference to the drawings. In the description of the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a diagram showing a configuration of a content distribution system 1 according to an embodiment of the present invention and functional configurations of a mobile phone 10 and a content distribution server 20. The content distribution system 1 according to the present embodiment is a system in which a content distribution server (distribution server) 20 distributes content to a mobile phone (communication terminal) 10, and includes the mobile phone 10 and the content distribution server 20. The mobile phone 10 and the content distribution server 20 are configured to be able to perform data communication via the network 30. For convenience, only one mobile phone 10 and one content distribution server 20 are shown, but a plurality of each may be included. In this embodiment, a mobile phone is used as a communication terminal. However, a simple mobile phone or a mobile information terminal connected to a mobile phone or a simple mobile phone may be used as a communication terminal. Good.

  Next, the hardware configuration and functional configuration of the mobile phone 10 will be described with reference to FIGS. 1 and 2.

  FIG. 2 is a hardware configuration diagram of the mobile phone 10. As shown in FIG. 2, the mobile phone 10 includes a CPU 101 that executes an operating system, application programs, and the like, a main storage unit 102 that includes a ROM and a RAM, an auxiliary storage unit 103 that includes a memory, and a network 30. The communication control unit 104 performs data communication, the display unit 105 includes a liquid crystal monitor, and the like, and the operation unit 106 includes keys for inputting characters and numbers and executing instructions.

  As shown in FIG. 1, the mobile phone 10 includes, as functional components, a charging unit 111, a charging start detection unit (charging start detection unit) 112, a start notification transmission unit (start notification transmission unit) 113, and a content reception unit. (Content receiving means) 114, charging interruption detection section (charging interruption detection means) 115, interruption notification transmission section (interruption notification transmission means) 116, and reception interruption section (reception interruption means) 117.

  Each function described with reference to FIG. 1 reads predetermined software on the CPU 101 and the main storage unit 102 shown in FIG. 2, operates the communication control unit 104 under the control of the CPU 101, and operates the main storage unit 102. Or by reading and writing data in the auxiliary storage unit 103.

  Charging unit 111 charges the rechargeable battery of mobile phone 10 with power supplied from an external power source (not shown). When charging is started in the charging unit 111, the charging unit 111 sends an event indicating the start of charging to the charging start detection unit 112. When the charging performed in the charging unit 111 is interrupted, the charging unit 111 sends an event indicating the charging interruption to the charging interruption detection unit 115.

  The charging start detection unit 112 detects an event indicating that the charging unit 111 has been supplied with power from an external power supply and has started charging, generates a start notification indicating that charging has started, and starts this start notification. The notification is sent to the notification transmitter 113. The start notification includes at least an identification code for identifying the mobile phone and a message indicating that charging has started in the mobile phone. For example, a start notification that the identification code is “ID1” and the message is “charge start” is generated.

  The start notification transmission unit 113 transmits the start notification transmitted from the charge start detection unit 112 to the content distribution server 20 designated in advance as a server that is to receive content distribution via the network 30.

  The content receiving unit 114 receives content distributed from the content distribution server 20 via the network 30 and stores the content in the main storage unit 102 or the auxiliary storage unit 103. Then, after the storage is completed, a reception completion notification indicating that the reception of the content is completed is transmitted to the content distribution server 20 via the network 30. The reception completion notification is transmitted every time one content is received and stored. For example, when the content A and the content B are to be distributed, the content is first stored when 100% of the content A is received, and a reception completion notification for the content A is transmitted. Next, when 100% of the content B is received, the content is stored, and a reception completion notification for the content B is transmitted.

  However, as will be described later, when an instruction to interrupt reception is sent by the reception interrupting unit 117, reception of the content is interrupted at that time, and only the received part is stored. Then, after the storage is completed, a partial reception notification indicating that only a part of the content has been received is transmitted to the content distribution server 20 via the network 30. For example, when an instruction to interrupt reception is sent from the reception interruption unit 117 when 80% of the “content A” file is received, only the 80% already received is stored in the main storage unit 102 or the auxiliary unit. A partial reception notification stored in the storage unit 103 and indicating that 80% of the content A has been received is transmitted to the content distribution server 20. Examples of content include program files and text files, still image data such as photos, moving image data such as video images, audio data such as music, and multimedia data such as video clips.

  The charging interruption detection unit 115 detects an event indicating that the charging performed in the charging unit 111 is interrupted, generates an interruption notification indicating that the charging is interrupted, and transmits the interruption notification to the interruption notification transmission unit. 116. The interruption notification includes at least an identification code for identifying the mobile phone and a message indicating that charging of the mobile phone has been interrupted. For example, an interruption notification with the identification code “ID1” and the message “charge interruption” is generated.

  The interruption notification transmission unit 116 transmits the interruption notification transmitted from the charging interruption detection unit 115 to the content distribution server 20 via the network 30.

  The reception interruption unit 117 disconnects the connection with the content distribution server 20 based on the fact that the interruption notification transmission unit 116 has transmitted the interruption notification, and sends a command to the content reception unit 114 to interrupt reception.

  Next, the hardware configuration and functional configuration of the content distribution server 20 will be described with reference to FIGS. 1 and 3.

  FIG. 3 is a hardware configuration diagram of the content distribution server 20 according to the present embodiment. As shown in FIG. 3, the content distribution server 20 includes a CPU 201 that executes an operating system, application programs, and the like, a main storage device 202 that includes ROM and RAM, an auxiliary storage device 203 that includes hard disks, a network card, and the like. Communication control device 204, output device 205 such as a monitor and printer, and input device 206 such as a keyboard and mouse.

  As shown in FIG. 1, the content distribution server 20 includes, as functional components, a storage unit 211, a start notification receiving unit (start notification receiving unit) 212, a distribution determination unit (distribution determination unit) 213, and a distribution unit (distribution unit). Means) 214, interruption notification receiving unit (interruption notification receiving unit) 215, and distribution interruption unit (distribution interruption unit) 216.

  Each function described with reference to FIG. 1 reads predetermined software on the CPU 201 and the main storage device 202 shown in FIG. 3, operates the communication control device 204 under the control of the CPU 201, and operates the main storage device 202. And by reading and writing data in the auxiliary storage device 203.

  The start notification receiving unit 212 receives a start notification transmitted from the mobile phone 10 via the network 30 and sends this start notification to the distribution determining unit 213.

  Based on the start notification sent from the start notification receiving unit 212, the distribution determining unit 213 uses the distribution status table 211a and the distribution time limit table 211b existing in the storage unit 211 to transmit the start notification. A list of contents to be distributed to 10 is extracted, and it is determined whether or not content distribution is necessary.

  FIG. 4 is a configuration diagram of the distribution status table 211a according to the present embodiment. As shown in FIG. 4, the distribution status table 211a includes at least an identification code for identifying a mobile phone, a content file, a distribution status of content recorded for each mobile phone, and a content file set for each mobile phone. Are stored in association with each other. For example, in the figure, in order to specify the distribution status of “content A” for “ID 1”, the identification code “ID 1”, the content file “content A”, the distribution order “1”, and the distribution order “distributed” "Is stored in association with each other. This record means that content A should be distributed first for ID1, and content A has already been successfully distributed to ID1 (100% distributed).

  FIG. 5 is a configuration diagram of the delivery time limit table 211b according to the present embodiment. As shown in FIG. 5, the delivery time limit table 211b stores at least a content file and a delivery time limit determined for each content file in association with each other. For example, in the figure, in order to specify the delivery time limit for “content A”, the content file “content A” and the delivery time limit “2006/01/31” are stored in association with each other. This record means that content A can be delivered to any mobile phone by January 31, 2006.

  The distribution determination unit 213 determines whether or not content distribution is necessary as follows. That is, after obtaining the identification code included in the start notification, it matches the identification code, the distribution status is not “distributed”, and the distribution status is that the corresponding content has not expired. The table 211a and the delivery time limit table 211b are searched. With this search, zero or more records are extracted from the distribution status table 211a. When the number of extracted records is one or more, the distribution unit 214 is instructed to distribute content to the mobile phone 10, and when the number is 0, it is determined that content distribution to the mobile phone 10 is not performed. For example, if the identification code included in the start notification is ID1, and the reception date of this start notification is “February 20, 2006”, distribution has not been completed for ID1, and the distribution deadline is 2006. “Content B” and “Content C” that are not days before February 20, are extracted.

  The distribution unit 214 performs content distribution based on the search result in the distribution determination unit 213. Specifically, the content included in the extracted record is distributed according to the distribution order to the mobile phone 10 having the identification code acquired by the distribution determination unit 213. For content in which a part of the file has already been distributed by the previous distribution, only the remaining undistributed data needs to be distributed. Further, the distribution unit 214 updates the distribution status of the content that has been distributed to “distributed” based on the reception completion notification transmitted from the mobile phone 10. Specifically, the distribution status in the distribution status table 211a is updated to “distributed” on condition of the identification code of the mobile phone 10 and the distributed content file. If the example of said extraction is followed, the content B and the content C will be delivered with respect to ID1 in order of the content B with the 2nd delivery order, and the content C with the 3rd delivery order. Thereafter, when the content distribution server 20 receives the reception completion notification for content B and the reception completion notification for content C transmitted from ID1, the content B and content C corresponding to ID1 in the distribution status table 211a are received. Update the record distribution status to “distributed”.

  However, as will be described later, when an instruction to interrupt the distribution is sent from the distribution interruption unit 216, the distribution is interrupted at that time. Thereafter, based on the partial reception notification transmitted from the mobile phone 10, the distribution status of the content distributed at the time of the interruption is updated so as to indicate the distribution rate. As in the previous example, this update is performed by associating the identification code sent from the distribution interruption unit 216 with the content file for which distribution has been interrupted. For example, if this distribution is interrupted when content C is distributed to ID1 up to 80% of the entire file, partial reception notification indicating that 80% of content C sent from the mobile phone 10 has been received. Based on the above, the distribution status of the record of the content C corresponding to ID1 in the distribution status table 211a is updated to “80% distribution (re-distribution required)”.

  The interruption notification receiving unit 215 receives the interruption notification sent from the mobile phone 10 via the network 30 and sends this interruption notification to the distribution interruption unit 216.

  The distribution interruption unit 216 acquires the identification code from the interruption notification sent from the interruption notification receiving unit 215, disconnects the connection with the mobile phone 10 that has this identification code, and notifies the distribution unit 214 of the identification code. Send an instruction to interrupt the delivery of code and content.

  Next, the operation of the content distribution system 1 according to the present embodiment will be described with reference to FIGS. 6 and 7, and the content distribution method according to the embodiment of the present invention will be described. FIG. 6 is a sequence diagram illustrating the operation of the content distribution system 1 when the mobile phone 10 performs all scheduled content distribution without interruption of charging. FIG. 7 is a sequence diagram illustrating an operation of the content distribution system 1 when charging is interrupted in the mobile phone 10 during content distribution.

  First, a description will be given with reference to FIG. When charging is started in the charging unit 111 of the mobile phone 10 by placing the mobile phone 10 on a cradle connected to an external power source or the like, the charging start detection unit 112 detects that charging has started ( Step S101; YES, charge start detection step), a start notification is created based on this detection (step S102, charge start detection step). Next, the start notification transmission unit 113 transmits the start notification to the content distribution server 20 (step S103, start notification transmission step).

  Thereafter, the start notification receiving unit 212 of the content distribution server 20 receives the start notification transmitted from the mobile phone 10 (start notification receiving step). Next, the distribution determination unit 213 acquires the identification code included in the start notification, searches the distribution status table 211a and the distribution time limit table 211b, and distributes the content to the mobile phone 10 that is the transmission source of the start notification. Is determined (step S104, distribution determination step). In this determination, when the number of extracted records is 0, the process is terminated without performing content distribution described later (step S104; NO, distribution determination step).

  On the other hand, when the number of extracted records is one or more (step S104; YES, distribution determination step), the distribution unit 214 distributes content to the mobile phone 10 based on the search result extracted by the distribution determination unit 213. (Step S105, distribution step).

  Thereafter, the content receiving unit 114 of the mobile phone 10 receives and stores the content distributed from the content distribution server 20 (step S106, content reception step), and transmits a reception completion notification to the content distribution server 20 ( Step S109, content reception step). The mobile phone 10 repeats this process until all distributed content is received (step S107, content reception step).

  Thereafter, the distribution unit 214 of the content distribution server 20 receives the reception completion notification transmitted from the mobile phone 10, and updates the distribution status table 211a based on the reception completion notification (step S108, distribution step).

  Next, a description will be given with reference to FIG. Note that the content distribution server 20 performs content distribution after detecting that the cellular phone 10 has started charging (step S201, charging start detection step), and the cellular phone 10 starts receiving content (step S206). The process up to (content reception step) is the same as that described with reference to FIG. In addition, the process (step S216, content reception step) in which the mobile phone 10 transmits a reception completion notification for the received and stored content is the same as that described with reference to FIG.

  After that, when the charging in the charging unit 111 is interrupted before the mobile phone 10 completes the reception of all scheduled contents, the charging interruption detecting unit 115 detects this charging interruption (step S208; YES, charging interruption) (Detection step), an interruption notice is created based on this detection (step S209, charge interruption detection step). Next, the interruption notification transmission unit 116 transmits the interruption notification to the content distribution server 20 (step S210, interruption notification transmission step). Then, the content reception unit 114 suspends the content reception based on the command issued by the reception interruption unit 117 in response to the transmission of the interruption notification (step S211, reception interruption step). Further, the content receiving unit 114 stores only the content received at the time of the interruption (step S212, content reception step), and transmits a partial reception notification to the content distribution server 20 (step S212). S213, content reception step).

  When the interruption notification is received by the interruption notification receiving unit 215 of the content distribution server 20 (interruption notification receiving step), the distribution interruption unit 216 disconnects the connection with the mobile phone 10 and instructs the distribution unit 214 to interrupt the content distribution. (Step S214, distribution interruption step). Thereafter, the distribution unit 214 suspends distribution based on this command (step S214, distribution interruption step), and receives zero or more reception completion notifications received before distribution interruption and partial reception notifications received after distribution interruption. Based on this, the distribution status table 211a is updated (step S215, distribution step).

  Next, effects of the content distribution system 1 according to the present embodiment will be described.

  According to the content distribution system 1 according to the present embodiment, first, in the mobile phone 10, when the charging start detection unit 112 detects that charging of the mobile phone has started, the charging start detection unit 112 sends a start notification. The start notification is transmitted to the content distribution server 20 via the network 30 by the start notification transmission unit 113. On the other hand, in the content distribution server 20, when the start notification is received by the start notification receiving unit 212, the distribution determination unit 213 determines whether there is content to be distributed to the mobile phone 10 based on the start notification. Is done. If such content exists, the content is distributed to the mobile phone 10 by the distribution unit 214, and this content is received and stored by the content reception unit 114 of the mobile phone 10. As described above, since the content distribution to the mobile phone is started after the mobile phone 10 starts charging, the mobile phone 10 can receive the content while securing the power necessary for receiving the content. . In particular, when the remaining battery of the mobile phone 10 is low and cannot withstand content reception without charging, or when the amount of data to be distributed is large and a large amount of power is consumed to receive the content, etc. In addition, the mobile phone 10 can complete the content reception.

  In the content distribution system 1, when it is detected that charging is interrupted by the charging interruption detection unit 115 of the mobile phone 10 after content distribution from the content distribution server 20 to the mobile phone 10 is started, the following is performed. Processing is performed. First, in the mobile phone 10, an interruption notification is created by the charging interruption detection unit 115, and the interruption notification transmission unit 116 transmits this interruption notification to the content distribution server 20 via the network 30. Further, the reception interruption unit 117 interrupts the content reception in response to the transmission of the interruption notification. On the other hand, in the content distribution server 20, when the interruption notification is received by the interruption notification receiving unit 215, the content distribution is interrupted by the distribution interruption unit 216 in response to the interruption notification. In this way, content distribution from the content distribution server 20 to the mobile phone 10 is executed only during the charging period of the mobile phone 10, so that the mobile phone 10 receives content without reducing its own charged power. can do. As a result, the mobile phone 10 can receive the content while more effectively securing the power required when receiving the content. Such an effect contributes to preventing unintentional power interruption by the user of the mobile phone 10 due to power consumption during content reception.

  The present invention is not limited to the above embodiment. For example, when charging is interrupted in the mobile phone 10 during content distribution, the mobile phone 10 stores the amount received until the charging is interrupted, and the content distribution server 20 indicates the distribution status so as to indicate the distribution rate. Although the table 211a is updated, the process for the content distributed when the charging is interrupted is not limited to this. For example, in the mobile phone 10, the content receiving unit 114 may discard the content being distributed without storing it. In this case, in the content distribution server 20, the distribution unit 214 updates the distribution status of the distribution status table 211a related to the content in the middle of distribution to simply “distribution failure (re-distribution required)” without indicating the distribution ratio. It is also possible (see FIG. 8). In short, the distribution status in the distribution status table 211a may be updated corresponding to the content storage status (reception status) of the mobile phone 10. In this modification, when a content whose distribution status is “distribution failure (redistribution required)” is redistributed, all the files of the content are redistributed.

It is a figure which shows the structure of the content delivery system which concerns on suitable embodiment of this invention, and the function structure of a mobile telephone and a content delivery server. It is a hardware block diagram of the mobile telephone shown in FIG. It is a hardware block diagram of the content delivery server shown in FIG. It is a figure which shows the structure of the delivery status table shown in FIG. It is a figure which shows the structure of the delivery time limit table shown in FIG. It is a sequence diagram which shows the detailed operation | movement about the content delivery by the content delivery system of FIG. It is a sequence diagram which shows the detailed operation | movement about the interruption of the content delivery by the content delivery system of FIG. It is a figure which shows the structure of the delivery status table which concerns on the modification of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Content distribution system, 10 ... Mobile telephone (communication terminal), 20 ... Content distribution server (distribution server), 30 ... Network, 112 ... Charge start detection part (Charge start detection means) ), 113... Start notification transmission unit (start notification transmission unit), 114... Content reception unit (content reception unit), 115... Charge interruption detection unit (charge interruption detection unit), 116. Notification transmission unit (interruption notification transmission unit), 117... Reception interruption unit (reception interruption unit), 212... Start notification reception unit (start notification reception unit), 213. , 214 ... Distribution section (distribution means), 215 ... Interruption notification reception section (interruption notification reception means), 216 ... Distribution interruption section (distribution interruption means)

Claims (7)

A communication terminal that receives content distributed from a distribution server via a network,
Charging start detection means for detecting whether charging has started,
A start notification transmitting means for transmitting a start notification indicating that charging has been started to the distribution server via the network when it is detected by the charge start detecting means that charging has started;
Content receiving means for receiving the content distributed from the distribution server in response to the start notification by the start notification transmitting means via the network;
A communication terminal comprising: Charging interruption detecting means for detecting whether charging is interrupted,
An interruption notification transmitting means for transmitting an interruption notification indicating that the charging has been interrupted to the distribution server via the network when the charging interruption detecting means detects that the charging has been interrupted;
A reception interruption unit for interrupting the process of receiving content via the network in response to the interruption notification transmitted by the interruption notification transmission unit;
The communication terminal according to claim 1, further comprising: A distribution server that distributes content to a communication terminal via a network,
A start notification receiving means for receiving via the network a start notification transmitted by the communication terminal indicating that charging has started in the communication terminal;
Based on the start notification received by the start notification receiving means, distribution determination means for determining whether or not content distribution to the communication terminal is necessary;
Distribution means for distributing content to the communication terminal via the network based on the determination by the distribution determination means;
A distribution server comprising: An interruption notification receiving means for receiving an interruption notification transmitted by the communication terminal and indicating that charging has been interrupted at the communication terminal, via the network;
Distribution interruption means for interrupting distribution of content to the communication terminal via the network based on the interruption notification received by the interruption notification receiving means;
The distribution server according to claim 3, further comprising:   A content distribution system comprising: the communication terminal according to claim 1 or claim 2; and the distribution server according to claim 3 or claim 4. A content distribution method in which a distribution server distributes content to a communication terminal via a network,
A charge start detection step for detecting whether the communication terminal has started charging the communication terminal; and
When the communication terminal detects that charging is started in the charging start detection step, a start notification is transmitted for transmitting a start notification indicating that charging of the communication terminal is started via the network. Steps,
A start notification receiving step in which the distribution server receives the start notification transmitted in the start notification transmitting step via the network;
A distribution determining step in which the distribution server determines whether or not content distribution to the communication terminal is necessary based on the start notification received in the start notification receiving step;
A distribution step in which the distribution server distributes content to the communication terminal via the network based on the determination in the distribution determination step;
A content receiving step in which the communication terminal receives the content distributed in the distribution step via the network;
A content distribution method comprising: A charge interruption detection step for detecting whether or not the communication terminal has stopped charging the communication terminal; and
When the communication terminal detects that charging has been interrupted in the charging interruption detection step, an interruption notification transmission step for transmitting an interruption notification indicating that charging has been interrupted via the network; and
A reception interruption step in which the communication terminal interrupts a process of receiving content via the network in response to the interruption notification transmitted in the interruption notification transmission step;
The distribution server receives the interruption notification transmitted in the interruption notification transmission step via the network;
A distribution interruption step in which the distribution server interrupts distribution of content to the communication terminal via the network based on the interruption notification received in the interruption notification reception step;
The content distribution method according to claim 6, further comprising:

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