JP2007005921A - Mobile terminal device sharing file and file sharing method - Google Patents

Abstract

Provided is a portable terminal device capable of forming a group among a plurality of users and sharing files without disclosing personal information.
A nickname and a keyword are input from an operation unit, and a file sharing request is transmitted to another mobile phone device together with the nickname and keyword. In the mobile terminal device on the receiving side, the file sharing group operation application 17 extracts a nickname and a keyword from the received file sharing request, and uses the nickname and the keyword as a transmission source of the file sharing request to select permission for file sharing. The transmission unit 19 that performs the display and the file sharing permitted for file sharing is registered in the file sharing group database 18. The mobile terminal device that has received the file sharing request selects whether to publish the file from the nickname and keyword. You can also share files with other people whose phone number or email address is being disclosed.
[Selection] Figure 1

Description

  The present invention relates to a portable terminal device such as a mobile phone that shares a file among a plurality of devices and a file sharing method thereof, in which a file is shared by forming a temporary group between portable terminal devices. is there.

  Conventionally, when sharing a file between mobile terminal devices such as a mobile phone device, the file is attached to a mail and transmitted, the storage medium storing the file is exchanged, or by infrared communication without user authentication Transferring files between devices at short distances is performed.

  Patent Document 1 below discloses an electronic information sharing system in which a server that collects information on public files stored in a plurality of mobile phone devices belonging to a specific group and a mobile phone device of the group are connected via a network. It is disclosed. A user who wishes to join this system transmits a user ID, password, name, address, e-mail address, etc. from the mobile phone device, and registers the file holding information to be disclosed to the group after registration in the system. The server provides a list of public files to the mobile phone devices belonging to the group, and when there is a public file distribution request from the mobile phone device, specifies the optimal distribution source from among the mobile phone devices holding the public files. The public file is transmitted from the designated mobile phone device to the requesting mobile phone device.

Patent Document 2 below discloses a group formation system for forming and managing a group in which a plurality of users exchange information on the Internet. In this system, the user's name and source IP address are sent from the mobile phone device to the server together with the user's personal information and preference information, and the server accumulates the personal information and preference information of each person, Based on the classification criteria, a group to which the user should belong is determined, and the determination result is notified to the user.
JP 2004-172818 A JP 2002-245212 A

  Humans have a desire to show possession information to a person having the same purpose and a desire to see information possessed by the person. However, for people who are not very close, there is a mix of the desire to exchange and share information they have with each other and the desire to disclose personally identifiable information such as phone numbers and email addresses. To do.

  For example, when exchanging tourist information with other tourists at a visited tourist spot, volunteers exchanging support information in a disaster area, or fans exchanging acquired information at a singer concert venue It is.

  As a file sharing method in such a case, the method of sending an attached file by e-mail is not suitable because it is necessary to know an e-mail address for identifying an individual. Also, in the method of exchanging the recording medium, when the file is shared only between specific users, it is difficult to physically manage the recording medium so that only the corresponding user can be shared. In addition, the method of using infrared communication without user authentication is that when file transmission is performed, the file is transferred to all mobile phone devices that are set to receive files within the distance that infrared communication can reach. It is not suitable as a means to allow file sharing.

  In addition, the systems described in Patent Document 1 and Patent Document 2 cannot be used when it is not desired to disclose information for identifying an individual such as a telephone number or an email address. In addition, these systems require a server for managing the group, and cannot participate in the group in an environment where the server cannot be connected.

  The present invention has been made in view of such circumstances, and forms a group among a plurality of users and shares a file within the group without disclosing information specifying an individual such as a telephone number or an e-mail address. An object of the present invention is to provide a portable terminal device that can be used and a file sharing method thereof.

  The mobile terminal device of the present invention is capable of specifying a first character string that can specify a user temporarily instead of permanently, and a second that can specify a temporary purpose instead of permanently. An input unit for inputting the character string, a transmission unit for transmitting a file sharing request as a message together with the first character string and the second character string, a receiving unit for the file sharing request, and the received file An extraction unit that extracts the first character string and the second character string included in the transmission message from the sharing request, and the extracted first character string and second character string are included in the file sharing request. As a transmission source, a display unit for displaying a selection of permission for file sharing and a registration unit for registering the transmission source permitted for file sharing are provided.

  With this configuration, a mobile terminal device that requests file sharing transmits a file sharing request by inputting a nickname as a first character string and a keyword as a second character string, and the mobile terminal device that has received the file sharing request From the nickname and keyword, it is possible to select whether or not to open the file to the transmission source of the file sharing request.

  In the mobile terminal device of the present invention, the registration unit registers the first character string of the transmission source permitted to share a file and the identifier of the physical communication interface of the mobile terminal device in association with each other. Including.

  With this configuration, when data transmission is performed between terminal devices using TCP / IP (Transmission Control Protocol / Internet Protocol) packet communication, the nickname of the transmission source of the file sharing request and the file sharing request The received mobile terminal device can be registered in association with the IP address assigned to the transmission source.

  In the mobile terminal device of the present invention, the registration unit registers a plurality of the transmission sources permitted to share files as a group, and the display unit displays the mobile terminal device belonging to the group as the first character. Includes those listed in columns.

  With this configuration, members registered in a group can be displayed as a list, and a folder published on the member's mobile terminal device identified by the nickname can be selected from the list to refer to the file. it can.

  In the mobile terminal device of the present invention, the registration unit may register a plurality of the groups and register the transmission source for each group.

  With this configuration, a group can be formed according to the purpose, and a public folder according to the purpose can be selected.

  Moreover, when the said group is updated because the said registration part added the portable terminal device registered into the said group, the portable terminal device of this invention is all the portable terminal devices registered into the said updated group. In addition, the updated registration information of the group is broadcasted.

  With this configuration, members belonging to a certain group can know the IP addresses assigned to all members belonging to the group, and can refer to the folders disclosed by the members of the group.

  In addition, the portable terminal device of the present invention includes a device that discards the registration information of the group when a predetermined time has elapsed.

  With this configuration, file sharing can be performed for a limited period.

  The portable terminal device of the present invention includes a device that selects a time when the registration information of the group is discarded, and discards the registration information of the group when the selected time elapses.

  With this configuration, the period can be set according to the purpose of file sharing.

  In addition, the file sharing method of the portable terminal device according to the present invention specifies the first character string that can temporarily specify the user, not the permanent, and the temporary, not permanent, purpose. An input step for inputting a second character string that can be transmitted, a transmission step for transmitting a file sharing request as a message together with the first character string and the second character string, and receiving the file sharing request A receiving step; an extracting step of extracting the first character string and the second character string included in the transmission message from the received file sharing request; the extracted first character string and the second character string; A selection step for selecting whether or not to allow file sharing, and a registration step for registering the transmission source that is permitted to share a file, using a character string as a transmission source of the file sharing request.

  By this method, a nickname and a keyword are input to make a file sharing request, and the mobile terminal device that has received the file sharing request determines whether or not to publish the file from the nickname and keyword to the transmission source of the file sharing request. You can choose.

  ADVANTAGE OF THE INVENTION According to this invention, the sharing of the file hold | maintained at the portable terminal device is realizable, without disclosing information which identifies individuals, such as a telephone number and a mail address.

  For this reason, file sharing can be performed with a party whose disclosure of a telephone number, an e-mail address, etc. is hesitant, and the usability of file sharing can be expanded.

FIG. 1 is a block diagram showing a configuration of a mobile phone device according to an embodiment of the present invention.

  This apparatus includes a communication antenna 10, a short-distance physical communication interface 11, a communication control unit 12, a TCP / IP protocol unit 13, a file sharing protocol unit 14, a file system 15, a file operation application 16, A file sharing group operation application 17, a file sharing group database 18, a display unit 19, and an operation unit 20 are provided.

  This cellular phone device temporarily forms an ad hoc network in which terminals communicate directly with each other by a wireless system such as a wireless LAN or Bluetooth, and shares files.

  The communication antenna 10 can directly perform information communication with another mobile phone device using radio waves, and information communication with the base station is not necessarily required.

  The short-distance physical communication interface 11 performs communication processing such as modulation / demodulation on the data transmitted / received via the communication antenna 10 according to the wireless communication method. The communication control unit 12 controls communication performed via the short-range physical communication interface 11.

  The TCP / IP protocol unit 13 generates data to be transmitted to another mobile phone device in accordance with the TCP / IP standard in order to perform packet communication based on the TCP / IP standard with another mobile phone device, Data is reconstructed from packets received from other mobile phone devices. The communication antenna 10, the short-range physical communication interface 11, the communication control unit 12, and the TCP / IP protocol unit 13 constitute a transmission unit and a reception unit.

  The file system 15 manages files and the like hierarchically.

  The file sharing protocol unit 14 grants permission for another mobile phone device that shares a file to refer to the file system 15, and controls reading / writing of data to / from the file system 15.

  The file sharing group operation application 17 associates the IP address assigned to the mobile phone device with the nickname and manages it as IP address / nickname correspondence information, and associates the group with the IP address of the mobile phone device belonging to the group. It is an application managed as subscriber information. A specific example of the IP address / nickname correspondence information is an IP address / nickname correspondence table 80 shown in FIG. 7 described later, and a specific example of the group subscriber information is a public file / IP address correspondence table 90 shown in FIG. 8 described later. . However, these information formats are not limited to those shown in FIGS.

  The file sharing group database (registration unit) 18 stores IP address / nickname correspondence information and group subscriber information.

  The file operation application 16 is an application for operating a file in the file system 15. The display unit 19 displays the mobile phone device. The operation unit 20 includes, for example, a numeric keypad, a function key, and the like, and includes an input unit that receives an operation input for executing each function of the mobile phone device.

  Here, file sharing for other apparatuses in the present embodiment is performed using, for example, a network file system (NFS) which is a distributed file system via a communication network.

  Next, the file sharing method of this embodiment will be described.

  For example, when the mobile phone device A requests sharing of a file managed by the file system 15 of another mobile phone device B, the user of the mobile phone device A self-joins to join the file sharing group. And a keyword indicating the purpose of file sharing are set, and an IP address acquisition request including this nickname and keyword is broadcasted to all mobile phone devices (broadcast). The nickname is set in place of the name in order to avoid identifying an individual. The keyword is set in order to inform the user of the cellular phone device B of the purpose of file sharing.

  When receiving the IP address acquisition request from the mobile phone device A, the mobile phone device B waiting for the IP address acquisition request determines whether or not to register the received nickname in the group. An IP address is assigned, and a response including this IP address is returned to the cellular phone device A.

  The flowchart of FIG. 10 shows a procedure until an IP address for file sharing is assigned. Here, the mobile phone device A is on the client side, and the mobile phone device B is on the server side. Both the cellular phone device A and the cellular phone device B have the configuration shown in FIG. 1, and both are structurally unchanged.

  First, the user of the mobile phone device A determines a nickname and a keyword for joining the group (step S1), operates the operation unit 20 to start the file sharing group operation application 17, and performs file sharing. A nickname and keyword input screen is called up to input a nickname and a keyword (step S2).

  At this time, a nickname and keyword registration screen 30 shown in FIG. 2 is displayed on the display unit 19, and the user inputs a nickname and a keyword from the operation unit 20. Here, “Hello” is registered as a nickname, and “Kanazawa Kenrokuen photo” is registered as a keyword. A nickname is composed of a character string that can identify a user temporarily rather than permanently, and a keyword is composed of a character string that can identify a temporary purpose, not permanent. . However, the character string is not limited to a pure character and may be a symbol or the like as long as the user and purpose can be specified.

  After inputting the nickname and keyword, an IP address acquisition request necessary for file sharing is broadcast to the IP network via the TCP / IP protocol unit 13, the communication control unit 12, the short-range physical communication interface 11, and the communication antenna 10. (Step S3).

  On the other hand, the user of the cellular phone device B operates the operation unit 20 in advance to activate the file sharing group operation application 17 and calls a display screen (file sharing group selection screen) for selecting a file sharing group. Then, the group that discloses the file stored in the file system 15 of the cellular phone device B is selected (step S10).

  At this time, the file sharing group selection screen 40 shown in FIG. 3 is displayed on the display unit 19, and the user selects, for example, a “temporary group” 42.

  When the file sharing group is selected, the file sharing group operation application 17 of the mobile phone device B assigns an IP address to the group (step S11).

  When a new IP address is assigned to the group, an address different from the IP address used in another group is set so as not to use the already used network. By not using a network that has already been used, broadcast transmission between mobile phone devices belonging to the group becomes possible. Here, “192.168.1” is assigned to the “temporary group”.

  After assigning the IP address for the group, the cellular phone device B waits for an IP address acquisition request for file sharing from the cellular phone device A or the like (step S12).

  Next, when the file sharing group operation application 17 of the mobile phone device B receives the IP address acquisition request for file sharing from the mobile phone device A, the file sharing group operation application 17 uses the nickname and the keyword included in the communication message of the IP address acquisition request. The extracted nickname 52 and the keyword 54 are entered on the file sharing permission selection screen 50 shown in FIG. 4 and the file sharing permission selection screen is displayed on the display unit 19. The user of the mobile phone device B who sees this selects from the nickname 52 and the keyword 54 whether or not to permit the mobile phone device A to join the group (step S13). When the user of the mobile phone device A and the user of the mobile phone device B mutually recognize the nickname for joining the group in advance, it is possible to determine whether to permit file sharing by the nickname. In addition, when the nicknames are not mutually recognized, it is possible to determine whether or not to permit file sharing depending on whether or not the keyword indicates the purpose of group participation.

  Next, in step S13, when the user of the mobile phone device B selects “Yes” 55 on the file sharing permission selection screen 50 in FIG. 4 and permits the mobile phone device A to join the group. The file sharing group operation application 17 registers the nickname of the mobile phone device A in the file sharing group selected in advance, and the nickname of the mobile phone device A is displayed on the “temporary group” group member confirmation screen 60 shown in FIG. “Hello” 65 is newly added and displayed on the display unit 19. The user of the cellular phone device B can confirm the new participation in the “temporary group” of the cellular phone device A from the group member confirmation screen 60 (step S14).

  In step S13, when the user of the mobile phone device B selects “No” 56 on the file sharing permission selection screen 50 in FIG. 4 and refuses to join the group of the mobile phone device A, The file sharing group operation application 17 displays the nickname “Hello” 73 on the group participation rejection screen 70 shown in FIG. The user of the mobile phone device B can confirm from the group participation rejection screen 70 that the group participation of the mobile phone device A is rejected.

  When the nickname of the mobile phone device A is registered in the file sharing group, the file sharing group operation application 17 of the mobile phone device B assigns an IP address corresponding to the nickname of the mobile phone device A, and the nickname and IP shown in FIG. An entry corresponding to the nickname of the mobile phone device A and the IP address is added to the IP address / nickname correspondence table 80 in which the address is associated. Here, “192.168.1.15” is assigned to “Hello”.

  This IP address / nickname correspondence table 80 is stored in the file sharing group database 18, and the mobile phone devices included in the group are stored in the mobile phone device B in a format in which the nickname and the IP address are associated with each other. The mobile phone device B includes the IP address “192.168.1.15” assigned to the mobile phone device A in a reply message to the mobile phone device A and transmits a response to the mobile phone device A (step S15). Note that if the participation in the group is rejected in step S13, the mobile phone device B responds to that effect to the mobile phone device A.

  Next, the file sharing group operation application 17 of the mobile phone device B stores the mobile phone device in the public file / IP address correspondence table 90 in which the file system public directory shown in FIG. 8 is associated with the IP address to be disclosed. The IP address assigned to A is added (step S16).

  The file system public directory described in this table is set based on a public folder selection process (steps S111 to S113 in FIG. 17) described later. The public file / IP address correspondence table 90 is stored in the file sharing group database 18, and the cellular phone device B is in a format in which the IP address included in the group is associated with the directory of the file system to be disclosed to the group. Saved in.

  Next, the cellular phone device B broadcasts the IP address / nickname correspondence table 80 for “temporary group” in FIG. 7 to all the cellular phone devices registered in the group (step). S17). This information is transmitted to all mobile phone devices belonging to the network whose IP address is “192.168.1”, and the mobile phone device A is also included in this information.

  The mobile phone device A that has transmitted an IP address acquisition request for file sharing to the IP network in a broadcast manner acquires the IP address in step S15 that the mobile phone device B has transmitted to the mobile phone device A. It is received as a reply message for the request, and the assigned IP address “192.168.1.15” is extracted (step S4). By this step, the IP address of the mobile phone device A is determined.

  Next, the cellular phone device A to which the IP address has been set transmits the broadcast address to all the cellular phone devices registered in the group by the cellular phone device B and broadcasts the message in step S17. Receive. The file sharing group operation application 17 extracts all nicknames and IP addresses registered in the “temporary group” and stores them in the file sharing group database 18 (step S5). By this step, the cellular phone device A recognizes the nicknames and IP addresses of all the cellular phone devices in the “temporary group” in which the cellular phone device A participates.

  Note that the mobile phone device can participate in a plurality of groups. The IP address of the mobile phone device registered in each group is stored in the file sharing group database 18 as a participating group / IP address comparison table 100 in which the group name and the own terminal IP address shown in FIG. The

  The user of the mobile phone device A who has acquired the IP address can refer to the public folder held in the file system of the mobile phone device B.

  The flowchart of FIG. 17 shows a procedure in which the cellular phone device A requests the file system reference and the cellular phone device B publishes the file system.

  First, the user of the mobile phone device A operates the operation unit 20 to start the file sharing group operation application 17 and selects one of the groups registered in the participating group / IP address comparison table 100 of FIG. (Step S101). Here, it is assumed that “temporary group” is selected.

  The file sharing group operation application 17 of the mobile phone device A displays the shared file disclosure / reference selection screen 140 shown in FIG. 14 on the display unit 19 to select whether to disclose 142 or reference 143 for the temporary group 141. When the user of the mobile phone device A selects the reference 143, a nickname list of mobile phone devices registered in the temporary group 141 is displayed on the reference destination selection screen 150 shown in FIG. The user selects a mobile phone device to be referred to by a nickname from the mobile phone devices registered in the temporary group (step S102).

  Next, the cellular phone device A issues a file reference request to the cellular phone device corresponding to the selected nickname. At this time, referring to the IP address / nickname correspondence table 80 shown in FIG. 7, the IP address corresponding to the nickname is searched, and a file reference request is issued to the extracted IP address (step S103).

  On the other hand, the user of the cellular phone device B operates the operation unit 20 to start the file sharing group operation application 17 and selects one group from which the file system is to be made public from among the groups registered in advance (step). S110). Here, it is assumed that “temporary group” is selected.

  The file sharing group operation application 17 displays the shared file disclosure / reference selection screen 110 shown in FIG. 11 on the display unit 19 to select whether the disclosure 112 or the reference 113 for the temporary group 111 is selected. When the public 112 is selected, a list of folders stored in the file system 15 is displayed on the public folder selection screen 120 shown in FIG. The user selects a folder to be disclosed to the temporary group from the public folder selection screen 120 (step S111).

  Next, the file sharing group operation application 17 of the mobile phone device B displays the folder release confirmation screen 130 shown in FIG. 13, and the user of the mobile phone device B selects whether or not to open the selected folder. (Step S112).

  When “Yes” 132 is selected on the folder release confirmation screen 130 (yes in step S113), the selected folder is released to all mobile phone devices registered in the “temporary group”, and Reception of a file reference request from the mobile phone device registered in the group is started (step S114). When “No” 133 is selected on the folder selection screen 130, the release of the selected folder is rejected to all mobile phones registered in the group (no in step S113).

  The mobile phone device B that has received the file reference request issued by the mobile phone device A in step S103 is whether or not the source mobile phone device A is registered in the group, that is, the mobile phone device that permits file disclosure. It is determined whether or not (step S115).

  When the cellular phone device A is a cellular phone device that permits file disclosure (Yes in step S115), the file sharing protocol unit 14 determines whether the cellular phone device A is based on the published file / IP address correspondence table 90 of FIG. The file reference is permitted (step S116), and the cellular phone device A refers to the desired file (step S104).

  If the mobile phone device A is not a mobile phone device that permits file disclosure (No in step S115), the mobile phone device A rejects the file reference and returns to the step of receiving the file reference request again (step S114). .

  When the mobile phone device A has not published the folder in the mobile phone device that issued the file reference request, the file access refusal screen shown in FIG. 16 is displayed on the mobile phone device A based on the response from the mobile phone device. Is displayed. From this display, the user of the mobile phone device A can recognize that file access of the mobile phone device associated with the selected nickname has been denied.

  In addition, the file sharing group automatically disappears after a predetermined period of time, and the file sharing is stopped, making it impossible to disclose and refer to the file.

  The flowchart of FIG. 18 shows a procedure for stopping file sharing.

  The user of the cellular phone device B operates the operation unit 20 to activate the file sharing group operation application 17, calls the file sharing group selection screen 40 in FIG. 3, and selects a group for file sharing in advance ( Step S210). Step S210 corresponds to step S10 in FIG. Here, it is assumed that “temporary group” 42 is selected.

  The mobile phone device B can set the duration of the selected group, and the user of the mobile phone device B designates the duration of the group according to the purpose of forming the group (step S211). ). When the user does not explicitly specify the group lifetime, the group lifetime (for example, 1 hour) preset in the mobile phone device B is applied.

  Next, the cellular phone device B receives an IP address acquisition request for file sharing from the cellular phone device A (step S212). Step S212 corresponds to step S12 in FIG.

  Next, when the group lifetime set in the mobile phone device B elapses, the mobile phone device B notifies the group destruction to all mobile phone devices (including the mobile phone device A) belonging to the group. This is performed (step S213).

  Next, the file sharing group operation application 17 of the cellular phone device B discards the IP address / nickname correspondence table of FIG. 7 stored in the file sharing group database 18 (step S214), and stops the file publication service. (Step S215), the IP address acquisition request reception service is stopped (Step S216).

  On the other hand, the cellular phone device A that has received the group discard notification (step S201), like the cellular phone device B, has the file sharing group operation application 17 stored in the file sharing group database 18 as shown in FIG. The nickname correspondence table is discarded (step S202), the file publishing service is stopped (step S203), and the IP address acquisition request receiving service is stopped (step S204).

  When the predetermined time elapses in this way, the group automatically disappears without the operation of the user of the mobile phone device, the file cannot be disclosed or referred to, and the temporary file sharing ends.

  Thus, this file sharing method can provide file sharing means suitable for temporary use.

  Here, wireless LAN and Bluetooth are mentioned as wireless systems for performing direct information communication between mobile phone devices without requiring information communication with a base station, but are not limited thereto.

  In addition, the display contents and the layout of the display screen shown in the embodiment are merely examples, and the present invention is not limited thereto.

  Although various embodiments of the present invention have been described above, the present invention is not limited to the matters shown in the above-described embodiments, and those skilled in the art can make modifications and applications based on the description and well-known techniques. This is also the scope of the present invention, and is included in the scope for which protection is sought.

  INDUSTRIAL APPLICABILITY The present invention can increase the usability of file sharing in mobile terminal devices such as mobile phone devices and PDAs, and is extremely useful for improving the functions of these devices.

The figure which shows schematic structure of the mobile telephone apparatus which concerns on embodiment of this invention. The figure which shows the input screen of the nickname and keyword which concerns on embodiment of this invention The figure which shows the file share group selection screen which concerns on embodiment of this invention The figure which shows the participation confirmation screen in the file sharing group which concerns on embodiment of this invention The figure which shows the member confirmation screen of the file sharing group which concerns on embodiment of this invention The figure which shows the participation refusal screen to the file sharing group which concerns on embodiment of this invention The figure which shows the IP address nickname correspondence table which concerns on embodiment of this invention The figure which shows the public file and IP address correspondence table which concerns on embodiment of this invention. The figure which shows the participating group IP address comparison table which concerns on embodiment of this invention. 1 is a flowchart showing an IP address acquisition method for file sharing according to an embodiment of the present invention. The figure which shows the shared file publicity and reference selection screen which concerns on embodiment of this invention (example of public selection) The figure which shows the public folder selection screen which concerns on embodiment of this invention The figure which shows the folder public confirmation screen which concerns on embodiment of this invention The figure which shows the shared file publicity / reference selection screen which concerns on embodiment of this invention (example of reference selection) The figure which shows the file reference destination selection screen which concerns on embodiment of this invention The figure which shows the file access refusal screen which concerns on embodiment of this invention FIG. 3 is a flowchart showing a method for publishing and referring to a shared file according to the embodiment of the present invention. FIG. 5 is a flowchart showing a method for automatically deleting a file sharing group according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Communication antenna 11 Near field communication physical communication interface 12 Communication control part 13 TCP / IP protocol part 14 File sharing protocol part 15 File system 16 File operation application 17 File share group operation application 18 File share group database 19 Display part 20 Operation part 30 nickname and keyword input screen 40 file sharing group selection screen 50 file sharing permission selection screen 60 file sharing group member confirmation screen 70 file sharing group participation refusal screen 80 IP address / nickname correspondence table 81 IP address / nickname correspondence table 90 public file IP address correspondence table 100 Participating group IP address comparison table 110 Shared file disclosure / reference selection Surface 120 public folder selection screen 130 folder public confirmation screen 140 shared file Public · reference selection screen 150 file reference destination selection screen 160 file access denied screen

Claims (8)

Input to input a first character string that can specify a user temporarily instead of permanent and a second character string that can specify a temporary purpose instead of permanent And
A transmission unit that transmits a file sharing request as a message together with the first character string and the second character string;
A receiver of the file sharing request;
An extraction unit that extracts the first character string and the second character string included in a transmission message from the received file sharing request;
A display unit that displays a file sharing permission selection using the extracted first character string and second character string as a transmission source of the file sharing request;
A registration unit for registering the transmission source permitted to share the file;
A mobile terminal device comprising: The mobile terminal device according to claim 1,
The said registration part is a portable terminal device which registers and matches the said 1st character string of the said transmission source with which file sharing was permitted, and the identifier of the physical communication interface of a portable terminal device. The mobile terminal device according to claim 2,
The registration unit registers a plurality of transmission sources permitted to share files as a group, and the display unit displays a list of mobile terminal devices belonging to the group in the first character string. The mobile terminal device according to claim 3,
The registration unit is a mobile terminal device that registers a plurality of the groups and registers the transmission source for each group. The mobile terminal device according to claim 3 or 4,
When the group is updated by adding a mobile terminal device registered in the group by the registration unit, the updated registration information of the group is registered in all the mobile terminal devices registered in the updated group. A mobile terminal device that broadcasts information. The mobile terminal device according to claim 3,
A portable terminal device that discards the registration information of the group when a predetermined time has elapsed. The mobile terminal device according to claim 3,
The portable terminal device which selects the time when the registration information of the group is discarded, and discards the registration information of the group when the selected time elapses. Input to input a first character string that can specify a user temporarily instead of permanent and a second character string that can specify a temporary purpose instead of permanent Steps,
A transmission step of transmitting a file sharing request as a message together with the first character string and the second character string;
A receiving step of receiving the file sharing request;
An extraction step of extracting the first character string and the second character string included in the transmission message from the received file sharing request;
A selection step of selecting whether or not to allow file sharing using the extracted first character string and second character string as a transmission source of the file sharing request;
A registration step of registering the sender permitted to share the file;
A file sharing method for a portable terminal device having

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