JP2010226677A - Data communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data communication system for allowing a portable terminal existing beyond a public radio communication network to read new data, and for preventing data readable by a portable terminal from being restricted. <P>SOLUTION: A data communication system 1 includes portable terminals 5A and 5B for communicating through a public radio communication network and a data storage device 3 installed in a place beyond the zone of the public radio communication network, and equipped with a communication part which performs short-range radio communication with the portable terminals 5A and 5B. The data storage device 3 receives the data from the portable terminal 5A existing in the communication range of the short-range radio communication through the communication part, and stores it. The portable terminal 5B receives the data stored in the data storage device 3 through the short-range radio communication with the communication part, and stores it. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a data communication system in which new data can be read into a mobile terminal that exists outside the public wireless communication network, and data that can be read into the mobile terminal is not limited.

  In recent years, portable terminals such as portable media players and portable game machines have become widespread, and there are the following three methods for reading data in this type of portable terminal.

  First, the first method is a method of transferring data stored in a terminal placed at home or the like to a portable terminal via a wireless LAN or a recording medium. In this method, when the user goes out with the portable terminal, new data cannot be read into the portable terminal.

  The second method is a method of downloading data stored in a server on a network such as the Internet using mobile communication. An example of this is the case where music data purchased from a music distributor is downloaded to a mobile terminal by using mobile communication. In this method, new data can be loaded into the mobile terminal only when the user carrying the mobile terminal is in a location where mobile communication radio waves can reach. When you ’re out of reach, you ca n’t load data on your mobile device.

  The third method is a method of causing the mobile terminal to read data by inserting a medium in which the data is stored into the mobile terminal. An example of this is when the game program stored in the mobile terminal is changed by inserting a storage medium for the game program into the mobile terminal. According to this method, if the user has a storage medium together with the mobile terminal, the mobile terminal can read new data, but the data that can be read into the mobile terminal is stored in the storage medium. Limited to the data that is being processed.

  As described above, in the first to third methods, there is a problem that the place where data can be read by the mobile terminal and the data that can be read are limited. Even if they are combined, they cannot be resolved.

  Here, in the field of mobile phones, a technique for establishing a connection from a mobile phone outside the public wireless communication network used for mobile phone communication to the public wireless communication network has been proposed.

  For example, in Patent Document 1, when there is a call from a mobile phone outside the public wireless communication network, communication using a nearby mobile phone as a relay station is performed until the mobile phone in the area is reached. A method for establishing a connection between a mobile phone outside the service area and a public wireless communication network by communicating with a wireless base station when the mobile phone in the service area is communicated is disclosed.

  Further, in Patent Document 2, when a call is made from a mobile phone outside the public wireless communication network, communication with a mobile phone in the area is attempted by ad-hoc communication, and the mobile phone in this area communicates with the wireless base station. Thus, a method for establishing a connection between the mobile phone outside the above-described area and a public wireless communication network is disclosed.

JP 2008-289045 A JP 2008-283535 A

  However, in the method disclosed in Patent Document 1, when there is no mobile phone outside the service area that can communicate with a mobile phone within the service area, a connection is established between the mobile phone outside the service area and the public wireless communication network. Can not do it. For example, if a subway vehicle is running far away from a station that is within the public wireless communication network, all of the mobile phones in the vehicle communicate with mobile phones in the station premises. I can't. For this reason, even if a mobile phone in the vehicle makes a call, a connection with the public wireless communication network cannot be established, and data cannot be transmitted / received or a call can be made with another mobile phone.

  Further, according to the method disclosed in Patent Document 2, a mobile phone outside the service area cannot transmit / receive data to / from another mobile phone unless there is a partner terminal capable of performing ad hoc communication.

  The present invention has been made in view of such circumstances, and an object of the present invention is to allow a portable terminal existing outside the public wireless communication network to read new data, and to read into the portable terminal. It is to provide a data communication system in which the possible data is not limited.

  In order to achieve the above object, a data communication system according to the present invention includes a portable terminal capable of communication via a public wireless communication network, and a portable terminal and a short-range wireless communication device installed in a place outside the public wireless communication network. Data storage means including a communication unit for performing communication, the data storage means receives and stores data from the portable terminal existing within the communication range of the short-range wireless communication through the communication unit, The portable terminal receives and stores data stored in the data storage means through the short-range wireless communication with the communication unit.

  According to the present invention, since the portable terminal can transmit and receive data through short-range wireless communication with the data storage device outside the public wireless communication network, the portable terminal can be surely read the data.

  In addition, since data transmitted from portable terminals existing within the range of the short-range communication network is stored in the data storage device, a large number of portable terminals enter the range of the short-range communication network. In the data storage device, various data are stored. As a result, the mobile terminal can receive various data from the data storage device.

It is a figure which shows the whole structure of the data communication system in embodiment of this invention. It is a block diagram which shows the physical structure of a data storage device. It is a block diagram which shows the physical structure of a portable terminal. It is a flowchart which shows the communication process in which a data storage device receives data from a portable terminal. It is a flowchart which shows the communication process in which a portable terminal receives data from a data storage device. It is a flowchart which shows the process which can be performed instead of the process of FIG. It is a flowchart which shows the process which can be added to the process of FIG. It is a figure which shows a measurement table. It is a flowchart which shows the process which can be performed instead of the process of FIG. It is a flowchart which shows the process which can be added to the process of FIG. It is a flowchart which shows the process which can be performed instead of the process of FIG. It is a figure which shows the image displayed on the display part of a portable terminal by step S701. 12 is a flowchart showing processing that can be added to the processing shown in FIGS. It is a figure which shows the image displayed on the display part of a portable terminal by step S802.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated. FIG. 1 is a diagram showing an overall configuration of a data communication system 1 according to an embodiment of the present invention.

  The data communication system 1 includes a data storage device 3 and a portable terminal 5 that is a music player.

  FIG. 2 is a block diagram showing a physical configuration of the data storage device 3. The data storage device 3 includes a control unit 30, a main storage unit 31, an external storage unit 32, and a communication unit 33, which are connected by an internal bus 34.

  The control unit 30 includes a CPU (Central Processing Unit) and executes various processes according to programs stored in the external storage unit 32.

  The main storage unit 31 is composed of a volatile memory such as a RAM (Random-Access Memory), loads a program stored in the external storage unit 32, and is used as a work area of the control unit 30.

  The external storage unit 32 includes a nonvolatile memory such as a hard disk, and stores various data such as the above-described program and music data used in the mobile terminal 5.

  The communication unit 33 is an interface that performs short-range wireless communication with the mobile terminal 5, and transmits and receives data by wireless communication with the mobile terminal 5 that exists in the communication network for short-range wireless communication.

  FIG. 3 is a block diagram showing a physical configuration of the mobile terminal 5. The portable terminal 5 includes a control unit 50, a main storage unit 51, an external storage unit 52, an operation unit 53, a display unit 54, and a communication unit 55, which are connected by an internal bus 56.

  The control unit 50, the main storage unit 51, and the external storage unit 52 have the same configuration and functions as the control unit 30, the main storage unit 31, and the external storage unit 32 described above. Various processes are executed in accordance with programs stored in the unit 52, the main storage unit 51 is used as a work area of the control unit 50, and the external storage unit 52 stores various data such as the above-described programs and music data.

  The operation unit 53 has a plurality of operation buttons, and is used by the user to operate processing in the mobile terminal 5.

  The display unit 54 includes a CRT (Cathode Ray Tube) or an LCD (Liquid Crystal Display), and displays various images.

  The communication unit 55 is an interface for performing wireless communication connection with the public wireless communication network of the mobile terminal 5 and the communication unit 33 of the data storage device 3, and the communication unit 55 allows the mobile terminal 5 to be connected to the public wireless communication network. Data can be transmitted / received to / from the base station or the data storage device 3.

  The data storage device 3 is arranged in a place outside the public wireless communication network (a place where radio waves of the public wireless communication network do not reach). In the example shown in FIG. 1, a state in which the data storage device 3 is arranged in the subway vehicle 7 as a place outside the public wireless communication network is shown. With this arrangement, the inside of the vehicle 7 includes the data storage device 3. This is a range where short-range wireless communication is possible. FIG. 1 shows mobile terminals 5A and 5B as examples of the mobile terminal 5, and the mobile terminals 5A and 5B are carried by a user who is on a subway vehicle 7. Under this situation, the communication unit 55 of the mobile terminals 5A and 5B cannot connect to the public wireless communication network of the mobile terminal 5, but can perform short-range wireless communication with the communication unit 33 of the data storage device 3. .

  According to the present embodiment, music data stored in the mobile terminal 5A can be transmitted to the mobile terminal 5B through short-range wireless communication with the data storage device 3 under the situation shown in FIG. . Specifically, the data storage device 3 receives music data from the portable terminal 5A through short-range wireless communication (corresponding to the arrow A), stores the received music data in the external storage unit 32, and further, the portable terminal 5B can receive music data stored in the data storage device 3 through short-range wireless communication (corresponding to the arrow B), and store the received data in the external storage unit 52. Hereinafter, details of communication processing performed between the mobile terminals 5A and 5B and the data storage device 3 will be described.

  The processing algorithm described below is stored as a control program in the external storage units 32 and 52 of the data storage device 3 and the portable terminal 5 (5A, 5B), and the main storage unit 31 at the start of operation. , 51 and executed by the control units 30, 50.

  FIG. 4 is a flowchart showing communication processing (corresponding to arrow A in FIG. 1) performed between the portable terminal 5A and the data storage device 3.

  First, the mobile terminal 5A determines whether or not the data storage device 3 has entered a range where short-range wireless communication is possible (step S101).

  When the user who owns the mobile terminal 5A is not in the subway vehicle 7, the mobile terminal 5A determines that the mobile terminal 5A is not within the range where communication with the data storage device 3 is possible (NO in step S101). Then, it waits until it can communicate with the data storage device 3.

  On the other hand, if it is determined that the user has entered the subway vehicle 7 and is within the range communicable with the data storage device 3 (YES in step S101), the mobile terminal 5A The music data stored in the storage unit 52 is transmitted to the data storage device 3 through short-range wireless communication (step S102).

  The data storage device 3 receives the music data transmitted from the portable terminal 5A (step S103), and stores the received music data in the external storage unit 32 (step S104). Through the above processing, the music data stored in the portable terminal 5A is stored in the data storage device 3.

  Next, communication processing (corresponding to the arrow B in FIG. 1) performed between the portable terminal 5B and the data storage device 3 will be described with reference to FIG.

  First, the portable terminal 5B determines whether or not the mobile terminal 5B has entered a range in which communication with the data storage device 3 is possible (step S201).

  When it is determined that the user who has the portable terminal 5B enters the subway vehicle 7 and enters the range in which the user can communicate with the data storage device 3 (YES in step S201), the portable terminal 5B Sends a request to the data storage device 3 to transmit a list of music data stored in the external storage unit 32 (step S202).

  Upon receiving the transmission request, the data storage device 3 transmits a list of music data stored in the external storage unit 32 to the portable terminal 5B (step S203).

  Then, the portable terminal 5B receives the music data list from the data storage device 3 (step S204), and displays the received list on the display unit 54 (step S205).

  And the portable terminal 5B receives selection of the music data which a user desires from the list | wrist displayed on the display part 54 (step S206). At this time, the user selects desired music data from the list displayed on the display unit 54 by operating the operation unit 53 of the portable terminal 5B.

  Then, the portable terminal 5B transmits identification information (for example, the song name of the music data) for identifying the music data selected in Step S206 to the data storage device 3 (Step S207).

  The data storage device 3 receives the identification information from the portable terminal 5B (step S208), and transmits the music data desired by the user of the portable terminal 5B to the portable terminal 5B based on the received identification information (step S209). ).

  Then, the portable terminal 5B receives the music data transmitted from the data storage device 3 (step S210), and stores the received music data in the external storage unit 52 (step S211).

  According to the processes in FIGS. 4 and 5 described above, since the mobile terminal 5 transmits and receives data through short-range wireless communication with the data storage device 3 outside the public wireless communication network, data is reliably transmitted to the mobile terminal 5. Can be read.

  In addition, since data transmitted from the portable terminal 5 existing within the range of the short-range communication network is stored in the data storage device 3, a large number of portable terminals 5 enter the range of the short-range communication network. As a result, various data are stored in the data storage device 3. As a result, the mobile terminal 5 can receive various data from the data storage device 3.

  In addition, since the data stored in the data storage device 3 is data stored and transmitted by the mobile terminal 5, more data stored in the mobile terminal 5 may be stored in the data storage device 3. Becomes higher. Thereby, the more popular data stored in many portable terminals 5, the higher the probability that it can be received from the data storage device 3.

  Note that the process shown in FIG. 4 may be changed to the process shown in FIG. Hereinafter, the process of FIG. 6 will be specifically described.

  First, the portable terminal 5A determines whether or not the mobile terminal 5A is within a range communicable with the data storage device 3 as in step S101 of FIG. 4 (step S301).

  If it is determined in step S301 that the communication with the data storage device 3 has been entered (YES in step S301), the mobile terminal 5A stores the music data stored in the external storage unit 52 of the terminal itself. Is sent to the data storage device 3 (step S302).

  The data storage device 3 receives the list transmitted from the mobile terminal 5A (step S303), and among the music data shown in the list, there is music data that is not stored in the external storage unit 32 of the own device. Whether or not (step S304).

  If it is determined that all the music data displayed in the list is stored in the external storage unit 32 (NO in step S304), the process illustrated in FIG. 6 ends.

  On the other hand, when there is music data that is not stored in the external storage unit 32 (YES in step S304), the data storage device 3 identifies information that identifies music data that is not stored in the external storage unit 32 (for example, The song name of the music data) is transmitted to the portable terminal 5A (step S305).

  Then, the mobile terminal 5A receives the identification information from the data storage device 3 (step S306), and based on the received identification information, stores the music data that is not stored in the data storage device 3 (external storage unit 32). The data is transmitted to the data storage device 3 (step S307).

  The data storage device 3 receives music data from the portable terminal 5A (step S308), and stores the received music data in the external storage unit 32 (step S309).

  According to the above processing, only music data that is not stored in the data storage device 3 is transmitted from the portable terminal 5 to the data storage device 3. As a result, the amount of data communicated between the portable terminal 5 and the data storage device 3 can be kept small, and the waste of storing the same music data in the data storage device 3 can be eliminated. Can do.

  Moreover, the process for measuring the number of the portable terminals 5 in which the same music data is stored can be added to the processes shown in FIGS. The process shown in FIG. 7 shows the process that can be added, and is executed after step S103 in FIG. 4 or step S303 in FIG. 6 (for example, executed immediately after S103 and S303). Hereinafter, the process of FIG. 7 will be described in detail.

  First, the data storage device 3 determines whether or not a measurement table (see FIG. 8) described later is stored in the external storage unit 32 (step S401).

  FIG. 8 is a diagram illustrating an example of a measurement table. In the measurement table, the data storage device 3 has transmitted the song names of the music data received from the portable terminal 5 in step S103 (or the song names shown in the list received from the portable terminal 5 in step S303) and the music data of these song names. The number of mobile terminals 5 (or the number of mobile terminals 5 that have transmitted a list showing song names) is shown.

  When the process of FIG. 7 is executed for the first time, the measurement table has not yet been created, and the data storage device 3 determines NO in step S401 and creates the measurement table (step S402). The table on the left side of FIG. 8 shows an example of a table created in the first process, and the song name of the music data received in step S103 (or the song name shown in the list received in step S303) is described. In addition, the number of mobile terminals “1” is attached to each song name.

  Next, the data storage device 3 stores the measurement table created in step S402 in the external storage unit 32 (step S403). Thus, the first process is completed.

  When the data storage device 3 performs the process of FIG. 4 or the process of FIG. 6 with another mobile terminal 5, the process of FIG. 7 is executed again.

  In step S401 in this re-processing, YES is determined because the measurement table has already been stored in the external storage unit 32 by the previous processing.

  Then, the data storage device 3 updates the measurement table based on the music data and the list received from the other portable terminal 5 in steps S103 and 303 of FIGS. 4 and 6 (step S404). Specifically, among the song names of the newly received music data (or song names shown in the newly received list), for song names that are not shown in the measurement table, the song names are newly added to the measurement table. At the same time, the number of portable terminals “1” is added to the added song title. For the song name already shown in the measurement table, “1” is added to the number of portable terminals attached to the song name.

  In the table on the right side of FIG. 8, the music data of the song titles “B”, “D”, “E”, and “F” is received in step S103 of FIG. 4, or the song titles “B”, “D”, and “F” are received in step S303 of FIG. By receiving a list showing E ”and“ F ”, the left table is updated. In the table on the right side, song names “E” and “F” are newly added as song names not shown in the table on the left side, and the number of mobile terminals “1” is added to these song names “E” and “F”. It is attached. For the song titles “B” and “D” already shown in the measurement table on the left, the number of mobile terminals is “2” by adding “1”. According to the updated table on the right side, the music data of the song titles “B” and “D” are stored in the two portable terminals 5, and the music data of the song titles “A”, “C”, “E”, and “F” are stored. It can be grasped that it is stored in one mobile terminal 5.

  When the measurement table is updated in step S404, the data storage device 3 overwrites the updated measurement table and stores it in the external storage unit 32 (step S405).

  According to the processing shown in FIG. 7 described above, the number of mobile terminals 5 in which the same music data is stored is obtained by acquiring the data (music title / number of mobile phones) shown in the measurement table. Can do. This provides useful information for marketing the mobile terminal 5 and creating advertisements and rankings that match the user's preferences that exist within the communication range of short-range wireless communication (in the subway vehicle 7 in FIG. 1). It is done.

  In addition, the user can be notified of popular music data by notifying the user of the data shown in the measurement table. This notification can be realized, for example, by transmitting a measurement table from the data storage device 3 to the portable terminal 5 using short-range wireless communication.

  Moreover, the process of FIG. 5 can be changed into the process shown in FIG. The process of FIG. 9 allows the mobile terminal 5 to perform a procedure for purchasing music data via a network such as the Internet, and also purchases music data and a list of purchased music data (hereinafter referred to as a purchased list). This is executed when the data can be received and stored in 5. In this case, the mobile terminal 5 is provided with a communication unit that performs wireless connection with the network in order to be able to purchase and receive the above-described music data and the like.

  Hereinafter, the process of FIG. 9 will be described by taking as an example a case where purchased music data and a purchased list are stored in the external storage unit 52 of the mobile terminal 5B (see FIG. 1). Note that the music data shown in the purchased list includes music data already stored in the external storage unit 52 of the mobile terminal 5B and music data not yet stored in the external storage unit 52 of the mobile terminal 5B. It is.

  First, the mobile terminal 5B determines whether it is within a range where communication with the data storage device 3 is possible (step S501).

  If the mobile terminal 5B determines that it is within the communicable range (YES in step S501), the mobile terminal 5B stores the music data not yet stored in the external storage unit 52 among the music data shown in the purchased list. Is extracted (step S502).

  Then, the portable terminal 5B transmits a list (hereinafter referred to as unstored data list) in which the music data extracted in step S502 is written to the data storage device 3 (step S503).

  Then, the data storage device 3 receives the unstored data list transmitted from the portable terminal 5B (step S504), and whether or not the music data indicated in the unstored data list is stored in the external storage unit 32. Is determined (step S505).

  If it is determined that the music data in the unstored list is not stored in the external storage unit 32 (NO in step S505), the data storage device 3 sends the music data shown in the unstored data list to the portable terminal 5B. Is notified that it cannot be transmitted (step S506).

  And the portable terminal 5B receives the above-mentioned notification from the data storage device 3 (step S507), and displays it on the display unit 54 of its own terminal (step S508). Thereby, the user of the portable terminal 5 </ b> B can grasp that purchased music data is not stored in the data storage device 3.

  On the other hand, when it is determined in step S505 that the music data shown in the unstored data list is stored in the external storage unit 52 (YES in step S505), the data storage device 3 stores in the unstored data list. Music data stored in the external storage unit 32 is extracted from the music data shown (step S509).

  Then, the data storage device 3 transmits a list (hereinafter, stored data list) in which the music data extracted in step S502 is recorded to the portable terminal 5B (step S510).

  Next, the portable terminal 5B receives the stored data list from the data storage device 3 (step S511), and displays the received stored data list on the display unit 54 (step S512).

  Next, the portable terminal 5B accepts selection of music data desired by the user from the stored data list displayed on the display unit 54 (step S513). At this time, the user operates the operation unit 53 to select desired music data from the stored data list displayed on the display unit 54.

  Then, the mobile terminal 5B transmits identification information (music name of music data) for identifying the music data selected in step S513 to the data storage device 3 (step S514).

  The data storage device 3 receives the identification information from the portable terminal 5B (step S515), and transmits the music data desired by the user of the portable terminal 5B to the portable terminal 5B based on the received identification information (step S515). S516).

  Then, the portable terminal 5B receives the music data transmitted from the data storage device 3 (step S517), and stores the received music data in the external storage unit 52 (step S518).

  According to the above processing, only the music data purchased by the mobile terminal 5 is transmitted from the data storage device 3 to the mobile terminal 5, so that the user of the mobile terminal 5 obtains music data that has not been purchased. It is not possible. As a result, it is advantageous for proper transaction of music data.

  In addition, since only purchased music data is stored in the mobile terminal 5, it is possible to eliminate waste of storing unnecessary music data in the mobile terminal 5.

  Moreover, in the process shown in FIG. 9, the process shown in FIG. 10 may be added. The process of FIG. 10 is a process in which the data storage device 3 acquires music data from an external server on a network such as the Internet, and the music data shown in the unstored data list in step S505 of FIG. This is executed when it is determined that the information is not stored in the device 3 (NO in step S505).

  In order to execute the process of FIG. 10, the data storage device 3 is provided with a communication unit that performs wireless communication with the above-described network, and the communication unit includes, for example, a subway vehicle 7 in the station premises. Connected to the network by arriving or the like. Further, when the process of FIG. 10 is executed, steps S506, 507, and 508 of FIG. 9 are omitted.

  First, the data storage device 3 determines whether or not the communication unit described above is connected to the network (step S601).

  If it is determined that it is not connected to the network (NO in step S601), the data storage device 3 waits until it is connected to the network.

  On the other hand, if it is determined that the subway vehicle 7 arrives at the station premises and is connected to the network (YES in step S601), the data storage device 3 stores the music data shown in the unstored data list on the network. From the external server (step S602) and store it in the external storage unit 32 (step S603).

  Thereafter, the processing after step S509 in FIG. 9 is executed, so that the stored data list including the music data stored in step S603 in FIG. 10 is transmitted to the portable terminal 5B. The user of the portable terminal 5B can cause the portable terminal 5B to receive the desired music data by selecting the desired music data from the music data shown in the stored data list.

  According to the process shown in FIG. 10, when the music data desired by the user of the portable terminal 5 is not stored in the data storage device 3, the data storage device 3 obtains the music data from the external server. To the mobile terminal 5. Thereby, the user of the portable terminal 5 can obtain desired music data with certainty.

  Moreover, the process shown in FIG. 5 can be changed to the process shown in FIG. The process shown in FIG. 11 is executed when the mobile terminal 5 is provided with a communication unit that performs wireless communication with the counterpart terminal 5, and is a user of one mobile terminal 5 (the mobile terminal 5B in FIG. 1). Is stored in another mobile terminal 5 (mobile terminal 5A in FIG. 1), one mobile terminal 5 (mobile terminal 5B) is desired from the other mobile terminal 5 (mobile terminal 5A). It is possible to acquire music data. Hereinafter, the process of FIG. 11 will be described.

  First, the portable terminal 5B accepts registration of identification information (specifically, song name) of music data desired by the user (step S701).

  FIG. 12 shows an image displayed on the display unit 54 of the portable terminal 5B in step S701. In this image, an input box 60 for inputting the music data song name is displayed, and the user operates the operation unit 53 while the image shown in FIG. Enter the song title. Then, the portable terminal 5B stores the input song name in the external storage unit 52.

  Then, the mobile terminal 5B determines whether it is within a range communicable with the data storage device 3 (step S702). If it is determined that the mobile terminal 5B is within a communicable range (YES in step S702), the mobile terminal 5A In response, the identification information (song name) registered in step S701 is transmitted (step S703).

  Then, the mobile terminal 5A receives the identification information from the mobile terminal 5B (step S704), and based on the received identification information, is the music data desired by the user of the mobile terminal 5B stored in the external storage unit 52? It is determined whether or not (step S705).

  If it is determined that the desired music data is not stored (NO in step S705), the portable terminal 5A notifies the portable terminal 5B that the music data cannot be transmitted (step S706). .

  Then, the mobile terminal 5B receives the above notification from the mobile terminal 5A (step S707) and displays it on the display unit 54 (step S708). Thereby, the user of the portable terminal 5B can grasp that the desired music data is not stored in the portable terminal 5A.

  On the other hand, if it is determined in step S705 that the music data desired by the user of the mobile terminal 5B is stored in the external storage unit 52 of the mobile terminal 5A (YES in step S705), the mobile terminal 5A Desired music data is transmitted to the data storage device 3 (step S709).

  The data storage device 3 receives and stores the music data transmitted from the mobile terminal 5A (steps S710 and 711), and transmits the music data to the mobile terminal 5B (step S712).

  The portable terminal 5B receives the music data transmitted from the data storage device 3 (step S713), and stores the received music data in the external storage unit 52 (step S714).

  According to the above processing, when data desired by the user of one mobile terminal 5 is stored in another mobile terminal 5, the data is transferred from the other mobile terminal 5 to the one mobile phone through the data storage device 3. It is transmitted to the terminal 5. Thereby, in order to make the user of the portable terminal 5 obtain desired data, the music data stored in the other portable terminals 5 is effectively used.

  In the music data transmission process in step S709, the music data may be directly transmitted from the portable terminal 5A to the portable terminal 5B by wireless communication (see broken line). By doing in this way, the communication frequency between the portable terminal 5 and the data storage device 3 can be suppressed small.

  Further, the transmission of the identification information in step S703 may be performed from the portable terminal 5B toward the data storage device 3 through short-range wireless communication (see broken line). In this case, the data storage device 3 transmits the identification information received from the mobile terminal 5B to the mobile terminal 5A (see the broken line), and thereafter, the processes after step S704 are performed.

  Further, the process shown in FIG. 13 is added to the processes shown in FIGS. This process is performed in order to securely store the music data received from the data storage device 3 by the mobile terminal 5 (mobile terminal 5B in FIG. 1) in the external storage unit 52 of the mobile terminal 5 (mobile terminal 5B in FIG. 1). Is to be done. The process shown in FIG. 13 is executed immediately after step S210 in FIG. 5, immediately after step S517 in FIG. 9, or immediately after step S713 in FIG. Hereinafter, the process of FIG. 13 will be specifically described.

  First, the portable terminal 5B determines whether or not the music data received in steps S210, 517, and 713 can be stored in the external storage unit 52 of the terminal itself (step S801). Specifically, it is determined whether or not the external storage unit 52 has a free capacity capable of storing the received music data.

  If it is determined that there is free space (YES in step S801), the portable terminal 5B executes steps S211, 518, and 714 of FIGS. 5, 9, and 11 to store the received music data in the external storage unit 52. To remember.

  On the other hand, if it is determined that there is no free space (NO in step S801), the mobile terminal 5B selects music data that may be deleted from the music data stored in the external storage unit 52. Accept (step S802). FIG. 14 shows an image displayed on the display unit 54 of the portable terminal 5B in this processing. In this image, song names of music data stored in the external storage unit 52 of the portable terminal 5B are listed, and a check box 70 is provided for each song name. During the display of the image in FIG. 14, the user operates the operation unit 53 to check the check box 70 of a song that may be deleted. As a result, the music data of the checked song name is selected as music data to be deleted.

  Then, the mobile terminal 5B deletes the music data selected in step S802 (step S803), and returns to step S801.

  The processing flow in steps S801, 802, and 803 is repeated until it is determined in step S801 that there is a free capacity that can be stored. If it is determined in step S801 that there is free space (YES in step S801), steps S211, 518, and 714 in FIGS. 5, 9, and 11 are executed thereafter, so that steps S210 and 517 are performed. , 713 are stored in the external storage unit 52 of the portable terminal 5B.

  According to the above processing, the unnecessary music data stored in the external storage unit 52 of the mobile terminal 5 is deleted, so that the external storage unit 52 has enough free space to store the received music data. The Thereby, the received music data can be reliably stored in the portable terminal 5.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims.

  For example, communication between the portable terminal 5 and the data storage device 3 may be performed by other communication methods such as a wired method.

  In addition, the data storage device 3 is not limited to being installed in the subway vehicle 7, and may be installed at any place outside the public wireless communication network of the mobile terminal 5.

  The mobile terminal 5 is not limited to a music player, and may be a video player, a game machine, a personal computer, or a PDA (Personal Digital Assistant).

  The data transmitted and received between the data storage device 3 and the portable terminal 5 is not limited to music data, but may be data such as images, videos, documents, software, books, and HTTP information on the Internet. When the data is Internet HTTP information, the data storage device 3 is provided with a communication unit for connecting to the Internet. The communication unit receives an image of a home page based on the HTTP information, and the data storage device 3 The external storage unit 32 stores homepage images. Then, the homepage image stored in the data storage device 3 is transmitted to the mobile terminal 5 in response to a request from the mobile terminal 5 to be viewed by the user of the mobile terminal 5 and displayed on the display unit of the mobile terminal 5. Is done.

  In the data communication system according to the present invention, preferably, the data storage means includes a measuring means for measuring the number of portable terminals that have transmitted the same data among portable terminals that have transmitted data by short-range wireless communication. It is characterized by.

  In addition, or in addition, the data storage means transmits a list of data stored in the data storage means to the portable terminal existing within a communication range of the short-range wireless communication, and receives the list The portable terminal receives selection of data desired by the user from the data shown in the list, and receives and stores the selected data from the data storage means.

  In addition, or in addition, the mobile terminal transmits the identification information for identifying the data desired by the user via wireless communication with another mobile terminal or communication with the data storage means by the short-range wireless communication. When transmitted to another mobile terminal, the other mobile terminal determines whether the desired data is stored based on the identification information, and when determining that the desired data is stored, The desired data is transmitted to the portable terminal that has transmitted the identification information through wireless communication with the portable terminal that has transmitted the identification information, or communication with the data storage unit by the short-range wireless communication, The transmitted data is received and stored in the portable terminal that transmitted the identification information.

DESCRIPTION OF SYMBOLS 1 Data communication system 3 Data storage device 5, 5A, 5B Portable terminal 30 Control part 31 Main storage part 32 External storage part 33 Communication part 34 Internal bus 50 Control part 51 Main storage part 52 External storage part 53 Operation part 54 Display part 55 Communication unit 56 Internal bus 60 Input box 70 Check box

Claims (4)

A portable terminal capable of communication via a public wireless communication network;
Data storage means installed in a place outside the public wireless communication network and having a communication unit for short-range wireless communication with the portable terminal;
The data storage means receives and stores data from the portable terminal that exists within the communication range of the short-range wireless communication through the communication unit,
The data communication system, wherein the portable terminal receives and stores data stored in the data storage means through the short-range wireless communication with the communication unit.   The said data storage means is provided with the measurement means which measures the number of the said portable terminals which transmitted the same data among the said portable terminals which transmitted data by the said short distance wireless communication. The data communication system described. The data storage means transmits a list of data stored in the data storage means to the portable terminal existing within a communication range of the short-range wireless communication,
The portable terminal that has received the list receives selection of data desired by the user from the data shown in the list, and receives and stores the selected data from the data storage means. The data communication system according to claim 1. The portable terminal transmits identification information for identifying data desired by the user to the other portable terminal through wireless communication with another portable terminal or communication with the data storage means by the short-range wireless communication. Send
The other portable terminal determines whether or not the desired data is stored based on the identification information, and determines that the desired data is stored. Is transmitted to the portable terminal that has transmitted the identification information via wireless communication with the portable terminal that has transmitted or communication with the data storage means by the short-range wireless communication, and the transmitted data is the The data communication system according to claim 1, wherein the identification information is received and stored in the portable terminal.

Images