JP2012123703A - Communication terminal, relay device and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent excessive traffic from occurring that could be induced when a communication terminal starts to download a plurality of contents in succession.SOLUTION: A communication terminal 100 receives communication addresses corresponding to each of a plurality of contents and data amounts of each of the contents from a server device 500 to calculate a total value of the data amounts. If the total value does not exceed a first threshold, to each content, the communication terminal 100 transmits a request with the communication address corresponding to the content, on the other hand, if the total value exceeds the first threshold, the communication terminal 100 does not transmit the requests to the contents.

Description

  The present invention relates to a communication terminal, a relay device, and a program.

  A technique for determining whether to download content to a communication terminal based on the data amount of the content is known. For example, in Patent Document 1, the time required for downloading the content is determined from the data amount of the content, and this time is shorter than the time required for a vehicle equipped with a communication terminal to reach a non-communication area such as a tunnel. In addition, a technique for executing download of the content has been proposed.

JP 2005-26731 A

By the way, a service is known in which a plurality of contents are sold together to a user of a communication terminal. In this service, since a plurality of contents are continuously downloaded, there is a possibility that excessive traffic occurs in the communication network.
An object of the present invention is to prevent excessive traffic that may occur when a plurality of contents are continuously downloaded to a communication terminal.

The communication terminal according to claim 1, a receiving unit that receives a communication address corresponding to each of a plurality of contents and a data amount of each content from a server device, a calculating unit that calculates a total value of the data amount, When the total value does not exceed the first threshold value, for each content, a request describing a communication address corresponding to the content is transmitted, while when the total value exceeds the first threshold value, It has a transmission means which does not transmit the request with respect to the said several content, and a content reception means which receives the content transmitted according to the said request, It is characterized by the above-mentioned.
The communication terminal according to claim 2 is the communication terminal according to claim 1, wherein the transmitting means sends the request describing the total value to a second threshold value that is smaller than the first threshold value. If the communication address described in the request is not a specific communication address, the request is transmitted to a relay device that does not transfer the request, and the content receiving unit transmits the request according to the request transferred by the relay device. The received content is received via the relay device.

The communication terminal according to claim 3 is the communication terminal according to claim 2, wherein the transmission means does not describe the total value in the request when the total value does not exceed the second threshold, If the total value is described in the request, the relay device determines that the total value has exceeded the second threshold value.
The communication terminal according to a fourth aspect is the communication terminal according to any one of the first to third aspects, wherein the transmission unit is configured such that the data amount of the content received by the content reception unit is the amount of the content received by the reception unit. When the amount of data is exceeded, the unsent request is not transmitted.

The relay device according to claim 5 includes: a receiving unit that receives a communication address corresponding to each of a plurality of contents and a data amount of each content from a server device; a calculating unit that calculates a total value of the data amount; When the total value does not exceed the first threshold value, a request that describes the communication address corresponding to the content and the total value is transmitted for each content, while the total value exceeds the first threshold value. When exceeding, the receiving means for receiving the request from the communication terminal having the transmitting means that does not transmit the request for the plurality of contents, and the total value described in the request is smaller than the first threshold value Transfer the request when the second threshold is exceeded and the communication address described in the request is not a specific communication address Non-transfer means, content receiving means for receiving the content transmitted in response to the request transferred by the transfer means, and content transfer means for transferring the content received by the content receiving means to the communication terminal. Features.
The relay device according to claim 6 is the relay device according to claim 5, wherein the transmission means of the communication terminal describes the total value in the request when the total value does not exceed the second threshold. The transfer means determines that the total value exceeds the second threshold if the total value is described in the request.

  The program according to claim 7 is a program for calculating a total value of the data amount, receiving means for receiving a communication address corresponding to each of a plurality of contents and a data amount of each content from a server device. When the total value does not exceed the first threshold value, a request describing a communication address corresponding to the content is transmitted for each content, while the total value exceeds the first threshold value. Further, the present invention is characterized by functioning as a transmission unit that does not transmit a request for the plurality of contents and a content reception unit that receives the content transmitted in response to the request.

  According to an eighth aspect of the present invention, there is provided a program that causes a computer to receive a communication address corresponding to each of a plurality of contents and a data amount of each content from a server device, and a calculating unit that calculates a total value of the data amount. And when the total value does not exceed the first threshold, for each content, a request describing a communication address corresponding to the content and the total value is transmitted, while the total value is the first value When a threshold value is exceeded, a receiving unit that receives the request from a communication terminal having a transmitting unit that does not transmit a request for the plurality of contents, and a total value described in the request is greater than the first threshold value Is exceeded when the second threshold value is exceeded and the communication address described in the request is not a specific communication address. Function as transfer means that does not transfer the request, content reception means that receives the content transmitted in response to the request transferred by the transfer means, and content transfer means that transfers the content received by the content reception means to the communication terminal It is characterized by making it.

  According to the present invention, it is possible to prevent excessive traffic that may occur when a plurality of contents are continuously downloaded to a communication terminal.

It is a figure which shows the whole structure of embodiment. 2 is a diagram illustrating a hardware configuration of a communication terminal 100. FIG. FIG. 3 is a diagram illustrating a hardware configuration of a relay device 300. 2 is a diagram illustrating a hardware configuration of a server device 500. FIG. It is a figure which shows operation | movement of embodiment. 6 is a diagram showing a screen displayed on the display unit 108. FIG. It is a figure which shows the content of metadata. It is a figure which shows an HTTP request. It is a figure which shows an HTTP request. It is a figure which shows an HTTP response. It is a figure which shows an HTTP response. 6 is a diagram showing a screen displayed on the display unit 108. FIG.

(1) Embodiment An embodiment of the present invention will be described.
(1.1) Configuration FIG. 1 is a diagram illustrating the overall configuration of the embodiment. The main components of this embodiment are a communication terminal 100, a mobile communication network 200, a relay device 300, a communication network 400, and a server device 500.
The communication terminal 100 is a mobile phone that performs communication in accordance with, for example, an IMT-2000 (International Mobile Telecommunication 2000) communication standard. Actually, there are many communication terminals other than those shown in the figure, but the illustration is omitted.
The mobile communication network 200 includes a base station 210, an exchange 220, and a relay device 300, and mediates communication and packet communication by the communication terminal 100. Actually, a number of base stations 210 and an exchange 220 other than those shown are provided, but they are not shown.

  The base station 210 constantly transmits area identification information for uniquely identifying the location registration area to which the base station 210 itself belongs. When the received area identification information is different from the previously received area identification information, the communication terminal 100 requests location registration from the base station 210. Then, the area identification information indicating the location registration area is registered in the exchange 220 in association with the telephone number of the communication terminal 100. When there is an incoming call addressed to a certain telephone number, the exchange 220 transmits an incoming call notification addressed to the telephone number to all the base stations 210 belonging to the location registration area corresponding to the telephone number, and these base stations 210 simultaneously sends incoming notifications addressed to the telephone number.

The relay device 300 has a function of mediating transmission / reception of electronic mail between the communication terminals 100, a function of distributing data to the communication terminal 100, a function of converting a communication protocol between the mobile communication network 200 and the communication network 400, and the like. . The relay device 300 has a function of restricting distribution of content from the server device 500 to the communication terminal 100. This function will be described later.
The communication network 400 is a communication network for performing communication according to a communication protocol such as TCP / IP (Transmission Control Protocol / Internet Protocol) or HTTP (HyperText Transfer Protocol).

FIG. 2 is a diagram illustrating a hardware configuration of the communication terminal 100. The communication terminal 100 includes a control unit 101, a storage unit 102, a packet communication unit 103, a call unit 104, a microphone 105, a speaker 106, an operation unit 107, a display unit 108, an antenna 109, and an IC (Integrated Circuit) card terminal 110.
The control unit 101 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory), and the CPU executes an OS (Operating System) stored in the ROM so that the communication terminal 100 Control the behavior.

The storage unit 102 is, for example, a semiconductor memory that retains storage even when power is not supplied, and stores application programs, data received via the mobile communication network 200, and the like. As one of the application programs, a browser program for causing the communication terminal 100 to function as a WWW (World Wide Web) browser is stored.
The packet communication unit 103 is a communication interface for connecting the communication terminal 100 to the mobile communication network 200 and performing packet communication. The packet communication unit 103 generates a packet based on the data supplied from the CPU 101, and transmits this packet to the base station 210 via the antenna 109. Further, when the packet transmitted from the base station 210 is received by the antenna 109, the packet communication unit 103 connects the packets and supplies them to the CPU 101.

The call unit 104 is a communication interface for connecting the communication terminal 100 to the mobile communication network 200 to make a call. The microphone 105 supplies an audio signal representing the input audio to the call unit 104, and the call unit 104 transmits this audio signal to the base station 210. In addition, the communication unit 104 supplies the audio signal received from the base station 210 to the speaker 106, and the speaker 106 converts the audio signal into audio and outputs it.
The operation unit 107 is a group of operators for operating the communication terminal 100, and in addition to various keys for power on / off, call start / end, number, symbol, character input, the display unit 108. And a determination key for instructing the communication terminal 100 to execute an operation corresponding to the movement destination of the cursor. The display unit 108 is, for example, a liquid crystal display device.

  The IC card 111 is a storage medium that is called a UIM (User Identity Module), a USIM (Universal Subscriber Identity Module), or the like and has an IC chip embedded in a resin plate that retains memory even when power is not supplied. The IC card 111 is loaned from the communication carrier to a user who has signed a contract regarding the use of the mobile phone with the communication carrier. The IC card 111 stores a user identifier for uniquely identifying the user, a communication carrier identification number, a telephone number, and the like. When the IC card 111 is inserted into the IC card terminal 110 and the power is turned on, the control unit 101 permits a call or packet communication.

  FIG. 3 is a diagram illustrating a hardware configuration of the relay device 300. The relay device 300 includes a control unit 301, a storage unit 302, and a communication unit 303. The control unit 301 includes a CPU, a ROM, and a RAM. The storage unit 302 is, for example, a hard disk storage device. The control unit 301 controls the operation of the relay device 300 by executing the OS and application program stored in the storage unit 302. The communication unit 303 is a communication interface for connecting the relay device 300 to the exchange 220 and the communication network 400.

  FIG. 4 is a diagram illustrating a hardware configuration of the server device 500. The server device 500 is a device operated by a content provider (hereinafter referred to as “CP”) that is a content distributor. The server device 500 includes a control unit 501, a storage unit 502, and a communication unit 503. The control unit 501 includes a CPU, a ROM, and a RAM, and causes the server device 500 to function as a WWW server when the control unit 501 executes the OS and application programs stored in the storage unit 502. The communication unit 503 is a communication interface for connecting the server device 500 to the communication network 400. The server device 500 communicates with the communication terminal 100 via the communication network 400 and the mobile communication network 200.

  The storage unit 502 stores metadata related to content provided to the user of the communication terminal 100 in association with a content identifier that uniquely identifies the content. Metadata is information related to content, and is specifically an XML format file including a URL (Uniform Resource Locator) that is a communication address corresponding to each content and the data amount of each content. The content includes, for example, music data for reproducing music on the communication terminal 100, still image data for displaying still images on the communication terminal 100, moving image data for reproducing moving images on the communication terminal 100, and the communication terminal 100. A game application for executing the game, background image data for adding a background image to an e-mail transmitted from the communication terminal 100, coupon data for receiving a discount on the price of goods and services, and the like. These contents may be distributed and stored in server apparatuses other than the server apparatus 500, or may be stored in server apparatuses operated by other CPs. The URL may be a communication address of a content storage location or a virtual address associated with a communication address of a content storage location.

(1.2) Operation FIG. 5 is a diagram illustrating the operation of the embodiment.
In step A01, a content purchase procedure is performed. Specifically, it is as follows.
When the user activates the browser program and accesses the URL of the CP, the server apparatus 500 transmits HTML (HyperText Markup Language) data for displaying an interactive screen to the communication terminal 100. The control unit 101 of the communication terminal 100 displays the screen illustrated in FIG. 6A on the display unit 108 based on the received HTML data. On this screen, the names of packages in which a plurality of contents are grouped are listed.
When the user moves the cursor to one of the package names using the movement key of the operation unit 107 and presses the enter key, the control unit 101 causes the display unit 108 to display the screen illustrated in FIG. On this screen, the names of the contents (1 to 4 in the figure) included in the selected package and the price of the package are displayed.

  When the user moves the cursor to the “Purchase” part displayed at the bottom of the image and presses the enter key, the control unit 101 displays the screen shown in FIG. When the user inputs a password on this screen, moves the cursor to the “decision” portion, and presses the decision key, the control unit 101 transmits the user identification information and password read from the IC card 111 to the relay device 300. Send to. The relay device 300 stores the user identification information and the password of the subscriber of the cellular phone in advance in the storage unit 302 in association with each other, and the combination corresponding to the combination of the user identification information and the password transmitted from the communication terminal 100 Is stored in the storage unit 302, the communication terminal 100 is notified of the success of authentication. Upon receiving this notification, the control unit 101 causes the display unit 108 to display the screen shown in FIG. When the cursor is moved to the “Purchase Confirmation” portion on this screen and the enter key is pressed, the purchase procedure is completed.

In step A02, the control unit 101 transmits an HTTP request indicating a metadata request to the server device 500. Specifically, in the HTML data described above, a content name and a content identifier are described in association with each other, and the control unit 101 stores content corresponding to each content included in the package whose purchase is confirmed in step A01. The identifier is extracted from the HTML data, an HTTP request describing the content identifier is generated, and the HTTP request is transmitted to the server apparatus 500. In step A03, the relay device 300 receives this HTTP request and transfers it to the server device 500.
In step A04, the control unit 501 of the server device 500 generates an HTTP response including metadata requested by the HTTP request, and transmits the HTTP response to the communication terminal 100. In step A05, the relay device 300 receives this HTTP response and transfers it to the communication terminal 100. FIG. 7 is a diagram illustrating the content of metadata transmitted from the server device 500 to the communication terminal 100. The name of the package is described between the start tag and the end tag of the element name “package”. In the start tag of the element name “content”, a content number that is a serial number of each content in the package, a URL of each content, and a data amount of each content are described. The name of the content is described between the start tag and the end tag of the element name “content”.

In step A06, the control unit 101 of the communication terminal 100 stores the metadata included in the HTTP response in the storage unit 102, and calculates the total data amount by adding the data amounts of the contents indicated by the metadata. In this example, the total data amount is 46 MB (Mega Byte).
In step A07, as shown in FIG. 6E, the control unit 101 causes the display unit 108 to display a sentence asking the user whether to start downloading the content. When the user moves the cursor to the “start” portion and presses the enter key (step A07: YES), the control unit 101 sets a counter indicating the number of downloads to an initial value (n = 0), and It is determined whether or not the total data amount calculated in step A06 exceeds 100 MB (first threshold) (step A08). If the total data amount exceeds 100 MB (step A08: YES), the process proceeds to step A09, an error message “Exceeding the prescribed data amount” is displayed on the display unit 108, and the process is terminated.

On the other hand, when the total data amount is 100 MB or less (step A08: NO), the control unit 101 adds 1 to the counter and determines whether the total data amount exceeds 50 MB (second threshold). Determine (step A10). If the total data amount exceeds 50 MB (step A10: YES), the process proceeds to step A11 to generate an HTTP request describing the total data amount. Specifically, the control unit 101 extracts a URL corresponding to the content number equal to the counter value from the metadata, and generates an HTTP request header as shown in FIG. The URL on the first line is a URL corresponding to the content whose content number is 1. The fourth line represents the total data amount calculated in step A06 in bytes.
On the other hand, when the total data amount does not exceed 50 MB (step A10: NO), the process proceeds to step A12, and an HTTP request not describing the total data amount is generated as shown in FIG. The HTTP request is the same as that shown in FIG. 8 except that the total data amount is not described.

In step A13, the control unit 101 transmits the HTTP request generated in step A11 or A12 to the server device 500.
In Step A14, the relay device 300 receives the HTTP request and determines whether or not the total data amount exceeds 50 MB. As shown in FIG. 8, if the total data amount is described in the HTTP request, it means that the total data amount exceeds 50 MB. On the other hand, if the total data amount is not described in the HTTP request as shown in FIG. 9, it means that the total data amount does not exceed 50 MB. If it is determined that the total data amount does not exceed 50 MB (step A14: NO), the control unit 301 transfers the HTTP request to the server device 500 (step A15).

  On the other hand, when the total data amount exceeds 50 MB (step A14: YES), it is determined whether or not the URL described in the HTTP request has been registered (step A16). Specifically, the storage unit 302 of the relay apparatus 300 stores the URL of the content that is permitted to be downloaded even when the total data amount of the package exceeds 50 MB. If the URL described in the HTTP request is stored in the storage unit 302, the URL has already been registered. If the URL has been registered (step A16: YES), the HTTP request is transferred to the server device 500 (step A18). If the URL described in the received HTTP request indicates the content stored in the storage unit 502, the control unit 501 of the server device 500 reads the content from the storage unit 502. On the other hand, if the URL indicates content stored in another server device, the content is acquired from the other server device. Then, as shown in FIG. 10, the control unit 501 generates an HTTP response with the content as a body, and transmits the HTTP response to the communication terminal 100 (step A19). “200” in the first line is a status code indicating that the processing in the server device 500 has been normally performed. The relay device 300 receives this HTTP response and transfers it to the communication terminal 100 (step A20).

On the other hand, if the URL has not been registered (step A16: NO), as shown in FIG. 11, an HTTP response indicating an error is generated and transmitted to the communication terminal 100 (step A17). “400” in the first line is a status code indicating an error.
In step A21, the control unit 101 determines whether there is an error based on the status code included in the received HTTP response. An error occurs when the status code is 400. If there is an error (step A21: YES), the control unit 101 displays an error message “For example, content cannot be downloaded because of an error” on the display unit 108, and the process ends (step A23).

  On the other hand, if it is not an error (step A21: NO), it is determined whether or not the data amount of the received content has exceeded the scheduled amount (step A22). Specifically, it is determined whether or not the value of Content-Length in the third line of the HTTP response (see FIG. 10) exceeds the data amount of the content indicated by the metadata (see FIG. 7). When it exceeds (step A22: YES), the control unit 101 displays an error message “Downloading is not possible because the content is incorrect” on the display unit 108, and the process ends (step A23).

  On the other hand, when the data amount does not exceed (step A22: NO), the control unit 101 determines whether or not downloading of all the contents of the package is completed (step A24). Specifically, it is determined whether or not the counter value has reached the maximum value of the content number in the metadata (see FIG. 7). If the counter value reaches the maximum value of the content number, the download of all content is complete. If the download of all contents is completed (step A24: YES), the process is terminated. If downloading of all contents has not been completed (step A24: NO), the process returns to step A10. In the second loop, the control unit 101 increments the counter value to 2 in step A10, and transmits an HTTP request describing the URL of the content number 2 in the metadata to the server device 500. In this way, content is downloaded one by one in the order of content numbers in the metadata.

When the download of all the contents included in the purchased package is completed, the control unit 101 causes the display unit 108 to display a screen listing the names of the contents, as shown in FIG. When the user moves the cursor to desired content and presses the enter key, the control unit 101 outputs information based on the content. For example, when the content is music data, an audio signal based on the music data is supplied to the speaker 106. When the content is image data, an image signal based on the image data is supplied to the display unit 108.
The above is the operation of the present embodiment.

Next, the effect of this embodiment will be described.
This embodiment is premised on a service form that provides a plurality of contents collectively. In this service form, since a plurality of contents are continuously downloaded, it is expected that excessive traffic occurs. In order to reduce traffic, it may be possible to limit the amount of data for each content, but even if the amount of data for each content is limited, traffic will be reduced if a large amount of content is downloaded. The effect of doing becomes thin. Therefore, this embodiment is configured not to limit the amount of data for each single content, but to limit the total data amount of a plurality of contents that are continuously downloaded. Therefore, according to this embodiment, it is possible to prevent excessive traffic that may occur when a plurality of contents are continuously downloaded to the communication terminal.

  Furthermore, this embodiment is configured to calculate the total data amount of a plurality of contents purchased together by the communication terminal 100 instead of the relay device 300. When the calculation of the total data amount is processed by the relay apparatus 300, although the load for each case is small, it is expected that an excessive load is applied to the relay apparatus 300 when the same processing is inundated from many communication terminals 100. . According to the present embodiment, since the calculation process of the total data amount is executed by each communication terminal 100, the load on the relay device 300 can be reduced.

  Furthermore, this embodiment does not permit unconditional download when the total data amount is equal to or less than the first threshold (100 MB), but when the total data amount exceeds the second threshold (50 MB), Only content whose URL has been registered in the relay device 300 is permitted to be downloaded. In other words, even if the total data amount is equal to or less than the first threshold value, the content whose total data amount exceeds the second threshold value and whose URL is not registered in the relay device 300 is not permitted to be downloaded. On the other hand, if the total data amount is equal to or smaller than the second threshold, the download is permitted even if the URL is not registered. As described above, according to the present embodiment, since it is configured to restrict the total data amount permitted to be downloaded for content that is not registered in advance, it is easy to control traffic.

  Furthermore, since the present embodiment is configured to abort the process when the data amount of the downloaded content exceeds the data amount indicated by the metadata, unauthorized download can be prevented. For example, if the CP is erroneously or intentionally transmitted metadata indicating a data amount smaller than the actual amount, the total data amount may exceed the first threshold value. This can prevent such a situation.

(2) Modifications Modifications shown below may be combined with each other.
(2.1) Modification 1
In the above embodiment, when the content URL is not registered (step A16: NO), and when the data amount of the downloaded content exceeds the planned data amount (step A22: YES), the display unit 108 is displayed. Although an example in which an error message is displayed and the process ends is shown, a process for downloading other content may be executed without ending the process. For example, after displaying an error message in step A23, the process may proceed to step A24.

(2.2) Modification 2
In the above embodiment, when the total data amount is 50 MB or less, an example in which an HTTP request that does not describe the total data amount is generated in step A12 is shown. However, regardless of the total data amount, It may be described in the request. In this case, steps A10 and A12 are not necessary.
(2.3) Modification 3
In the above embodiment, an example in which the first threshold value is 100 MB and the second threshold value is 50 MB is shown, but the first threshold value and the second threshold value may be set to other values.
(2.4) Modification 4
In the above embodiment, an example of providing a package in which a plurality of contents are collected has been shown. However, instead of a package form, a plurality of single contents may be purchased together. For example, as shown in FIG. 12, a screen listing the names of the respective contents is displayed on the display unit 108, and the user selects desired contents one by one, and purchases a plurality of selected contents at once. It may be.

(2.5) Modification 5
In the embodiment described above, an example in which metadata describing the URL and data amount of content is acquired from the server device 500 has been described. However, the URL and data amount of each content are described in the HTML data acquired from the server device 500 in step A01. May be. In this case, since the metadata is unnecessary, the processing of steps A02 to A05 is unnecessary.
(2.6) Modification 6
In the above embodiment, an example (step A22) is shown in which the processing is terminated when the data amount of the downloaded content exceeds the data amount indicated by the metadata, but this step may be omitted. In this case, the processing after step A10 is executed for the content for which the request has not been transmitted.
(2.7) Modification 7
In the above embodiment, when the total data amount is 100 MB or less and exceeds 50 MB, the download is permitted only for the content whose URL is already registered. However, if the total data amount is 100 MB or less, unlimited download is permitted. You may do it.

(2.8) Modification 8
In the above embodiment, the example in which it is determined whether or not the total data amount exceeds the first threshold value in step A08 has been described. However, it is determined whether or not the total data amount is equal to or more than the first threshold value. May be. Similarly, in steps A10 and A14, it may be determined whether or not the total data amount is greater than or equal to the second threshold value.
(2.9) Modification 9
In the above embodiment, when the total data amount is 100 MB or less and exceeds 50 MB, the download is permitted only for the content whose URL is already registered. However, a specific symbol string is included in the URL of the content permitted to be downloaded. In addition, when the symbol string is included in the URL described in the HTTP request, downloading of the content corresponding to the URL may be permitted.
(2.10) Modification 10
In the above embodiment, an example in which the relay device 300 transmits a request to the server device 500 in steps A15 and A18 has been described. However, when the communication address corresponding to the content corresponds to a device other than the server device 500, A request may be transmitted to the device.

(2.11) Modification 11
In the above embodiment, the communication terminal 100 is an example of a mobile phone. However, the communication terminal 100 is an apparatus having a data communication function, such as a mobile communication terminal that does not have a telephone function, an automobile navigation device, or a personal computer. Any device is acceptable. Moreover, although the communication terminal 100 acquired the content via the mobile communication network 200 in the said embodiment, you may make it acquire content via wireless LAN (Local Area Network). Further, the communication terminal 100 may acquire content through a wired connection.
(2.12) Modification 12
In the above embodiment, the example in which the CPU of the communication terminal 100, the relay device 300, and the server device 500 performs the operation illustrated in FIG. 5 by executing the program has been described. You may make it mount. Further, the program may be provided in a form recorded on a recording medium such as an optical disk, or may be downloaded to a computer via a communication network.

DESCRIPTION OF SYMBOLS 100 ... Communication terminal, 101 ... Control part, 102 ... Memory | storage part, 103 ... Packet communication part, 104 ... Call part, 105 ... Microphone, 106 ... Speaker, 107 ... Operation part, 108 ... Display part, 109 ... Antenna, 110 ... IC card terminal, 200 ... mobile communication network, 210 ... base station, 220 ... exchange, 300 ... relay device, 301 ... control unit, 302 ... storage unit, 303 ... communication unit, 400 ... communication network, 500 ... server device, 501 ... Control unit, 502 ... Storage unit, 503 ... Communication unit

Claims (8)

Receiving means for receiving a communication address corresponding to each of the plurality of contents and a data amount of each of the contents from the server device;
Calculating means for calculating a total value of the data amount;
When the total value does not exceed the first threshold value, for each content, a request describing a communication address corresponding to the content is transmitted, while when the total value exceeds the first threshold value, Transmitting means for not transmitting a request for the plurality of contents;
And a content receiving means for receiving the content transmitted in response to the request. The transmission means determines that the request describing the total value exceeds the second threshold value where the total value is smaller than the first threshold value, and the communication address described in the request is a specific communication address. If not, send the request to the relay device that does not forward,
The communication terminal according to claim 1, wherein the content receiving unit receives the content transmitted in response to the request transferred by the relay device via the relay device. The transmitting means does not describe the total value in the request when the total value does not exceed the second threshold;
The communication terminal according to claim 2, wherein if the total value is described in the request, the relay device determines that the total value exceeds the second threshold value.   The transmission unit does not transmit the untransmitted request when the data amount of the content received by the content reception unit exceeds the data amount of the content received by the reception unit. The communication terminal according to any one of 1 to 3. Receiving means for receiving a communication address corresponding to each of a plurality of contents and a data amount of each content from a server device; a calculating means for calculating a total value of the data amount; and the total value is a first threshold value. If not, for each content, a request describing the communication address corresponding to the content and the total value is transmitted, and when the total value exceeds the first threshold, the plurality of contents Receiving means for receiving the request from a communication terminal having a transmitting means that does not transmit a request for
Transfer in which the request is not transferred when the total value described in the request exceeds a second threshold smaller than the first threshold and the communication address described in the request is not a specific communication address Means,
Content receiving means for receiving the content transmitted in response to the request transferred by the transfer means;
And a content transfer means for transferring the content received by the content receiving means to the communication terminal. The transmission means of the communication terminal does not describe the total value in the request when the total value does not exceed the second threshold,
The relay apparatus according to claim 5, wherein the transfer unit determines that the total value exceeds the second threshold if the total value is described in the request. Computer
Receiving means for receiving a communication address corresponding to each of the plurality of contents and a data amount of each of the contents from the server device;
Calculating means for calculating a total value of the data amount;
When the total value does not exceed the first threshold value, for each content, a request describing a communication address corresponding to the content is transmitted, while when the total value exceeds the first threshold value, Transmitting means for not transmitting a request for the plurality of contents;
A program for functioning as content receiving means for receiving content transmitted in response to the request. Computer
Receiving means for receiving a communication address corresponding to each of a plurality of contents and a data amount of each content from a server device; a calculating means for calculating a total value of the data amount; and the total value is a first threshold value. If not, for each content, a request describing the communication address corresponding to the content and the total value is transmitted, and when the total value exceeds the first threshold, the plurality of contents Receiving means for receiving the request from a communication terminal having a transmitting means that does not transmit a request for
Transfer in which the request is not transferred when the total value described in the request exceeds a second threshold smaller than the first threshold and the communication address described in the request is not a specific communication address Means,
Content receiving means for receiving the content transmitted in response to the request transferred by the transfer means;
A program for functioning as content transfer means for transferring content received by the content receiving means to the communication terminal.

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