JP4768835B2 - COMMUNICATION CONTROL DEVICE, COMMUNICATION SYSTEM, COMMUNICATION SWITCHING METHOD, AND PROGRAM - Google Patents

Description

  The present invention relates to a technique for preventing information leakage due to information processing in a remote place.

  As countermeasures against information leakage, so-called thin clients are increasingly used. Here, the thin client refers to a communication terminal that has only limited functions such as display and operation and depends on the server device for most other functions. When a thin client is used, software resources such as document data (hereinafter simply referred to as “resources”) can be edited while being held in the server device, thereby preventing the resource itself from leaking out of the thin client. It is possible.

  Even if the thin client is used, the leakage of the resource itself can be prevented, but the leakage of the displayed information can be seen by a third party or the neglected thin client is operated by a third party. It cannot be prevented. Patent Document 1 describes a technique for determining a resource disclosure range according to the position of a terminal, but it cannot be said that such leakage does not occur just because the terminal is in a predetermined position.

JP 2008-160803 A

  Therefore, an object of the present invention is to suppress browsing and operation of information by an unintended third party in a manner corresponding to the position of a communication terminal.

  The communication control device according to the present invention includes: first transmission means for transmitting first screen information for accepting an operation in the first communication terminal to the terminal; and position information representing the position of the first communication terminal. First acquisition means for acquiring the second position, second acquisition means for acquiring switching position information representing a switching position for switching the transmission destination of the screen information, and the position information acquired by the first acquisition means. When the position to be represented is the switching position represented by the switching position information acquired by the second acquisition means, the second communication terminal to which the function related to display or operation is restricted from the first communication terminal, And a second transmission unit that transmits second screen information corresponding to the first screen information. According to this configuration, since a communication terminal as a communication partner is switched so that display or operation is restricted at the switching position, it is possible to suppress browsing or operation by an unintended third party at the switching position.

In the communication control apparatus according to the present invention, the first acquisition means includes first position information representing a position of the first communication terminal, second position information representing a position of the second communication terminal, and And when the second transmission means represents both of the positions represented by the first and second position information acquired by the first acquisition means, the second screen information. It was transmitted to the second communication terminal, if the position representing the first and second position information acquired by the first acquisition unit is not any the switching position, the said second screen information A configuration that does not transmit to the second communication terminal can be employed. According to this configuration, it is possible to change the mode of switching according to the position of the second communication terminal.

  The communication control device according to the present invention comprises first determination means for determining whether or not a positional relationship between the first communication terminal and the second communication terminal satisfies a predetermined condition, A configuration may be adopted in which the transmission unit transmits the second screen information to the second communication terminal when the first determination unit determines that the positional relationship satisfies the predetermined condition. it can. According to this configuration, it is possible to perform switching independent of only the position of the first communication terminal.

Whether the communication control apparatus according to the present invention has a third communication terminal different from any of the first and second terminals within a predetermined distance from the first or second communication terminal. A second determination unit that determines whether the third communication terminal is within the predetermined distance range by the second determination unit. In addition, instead of the first or second screen information, a configuration for transmitting screen information for limiting display or operation by the first or second communication terminal may be employed. According to this configuration, it is possible to suppress browsing and operation by a third party who owns the third communication terminal.

  In the communication control apparatus according to the present invention, when the first transmission unit transmits the second screen information by the second transmission unit, the first transmission unit replaces the first screen information with the first screen information. The structure which transmits the screen information for restrict | limiting the display or operation by these communication terminals is employable. According to this configuration, it is possible to prevent the display by the screen information before switching of communication from being left on the first communication terminal.

  The communication system according to the present invention communicates with a server device, a first communication terminal that communicates with the server device, and the server device, and functions related to display or operation are limited by the first communication terminal. A first display unit that displays an image represented by the screen information, and a first generation unit that generates operation information corresponding to the received operation. And a first communication means for receiving the image information and transmitting the operation information generated by the generating means, wherein the second communication terminal displays an image represented by the screen information. And a second communication means for receiving the image information, wherein the server device is a first acquisition means for acquiring position information representing a position of the first communication terminal, and a position for switching communication. Switching position information representing a certain switching position Second obtaining means, third communication means for communicating with the first and second communication terminals, and process execution means for executing processing according to the operation information transmitted from the first communication terminal The third communication means transmits first screen information for accepting an operation to the first communication terminal, and the position represented by the position information acquired by the first acquisition means is The second screen information different from the first screen information is transmitted to the second communication terminal when the switching position is indicated by the switching position information acquired by the second acquisition means.

  In the communication switching method according to the present invention, the first communication terminal located at a predetermined position receives the first screen information from the server device and represents an operation accepted based on the first screen information. Operation information is transmitted to the server device, the server device executes a process according to the operation information, and the first communication terminal is a position for switching communication from the predetermined position, and is a switching position. When the server device moves to a switching position that is a position represented by information, the server device performs the first communication terminal with respect to a second communication terminal in which functions related to display or operation are restricted. The second screen information corresponding to the screen information is transmitted.

  A program according to the present invention includes: a first supply unit that supplies a first screen information transmitted to a computer to receive an operation at the first communication terminal; and a position of the first communication terminal. Acquired by the first acquisition means, the second acquisition means for acquiring the switching position information indicating the switching position that is the position for switching the transmission destination of the screen information, and the first acquisition means. Second communication in which functions related to display or operation are restricted by the first communication terminal when the position represented by the position information is the switching position represented by the switching position information acquired by the second acquisition unit. The second screen information transmitted to the terminal is configured to function as second supply means for supplying second screen information corresponding to the first screen information.

  According to the present invention, it is possible to suppress browsing and operation of information by an unintended third party in a manner corresponding to the position of the communication terminal.

Diagram showing overall configuration of communication system The block diagram which shows the hardware constitutions of a communication terminal (1st communication terminal) The block diagram which shows the hardware constitutions of a communication terminal (2nd communication terminal) Block diagram showing the hardware configuration of the server device The figure which illustrates switching position information Diagram illustrating motion information Functional block diagram showing the functions realized by the server device The figure which illustrates the screen displayed when performing location registration processing The flowchart which shows the position registration process which a server apparatus performs The flowchart which shows the communication control processing which a server apparatus performs The flowchart which shows the condition judgment processing which a server apparatus performs The figure which illustrates the screen which is displayed with the scheduler

[Embodiment]
FIG. 1 is a diagram showing an overall configuration of a communication system according to an embodiment of the present invention. The communication system 10 of the present embodiment includes a communication terminal 100, a communication terminal 200, and a server device 300, and the communication terminals 100 and 200 and the server device 300 are connected via a communication network NW1. The communication terminals 100 and 200 are wireless communication terminals, and the communication network NW1 includes at least a node that performs wireless communication in a part thereof. The communication network NW1 is, for example, a communication network in which a mobile communication network and the Internet are connected via a gateway device.

  In the present embodiment, it is assumed that the communication terminals 100 and 200 are used by the same user. That is, the user moves for business or the like while carrying the communication terminals 100 and 200 together. In the present embodiment, the communication terminal 100 is a so-called mobile thin client and corresponds to the first communication terminal in the present invention. The communication terminal 100 has an appearance like a so-called notebook personal computer. Communication terminal 200 is a mobile phone that replaces communication terminal 100, and corresponds to the second communication terminal in the present invention.

  It is assumed that the communication system 10 of this embodiment is used for a plurality of users. That is, it is assumed that the communication system 10 according to the present embodiment includes a plurality of pairs of the communication terminals 100 and 200 illustrated. Note that all of the users may not own the set of communication terminals 100 and 200, or may have a person who owns the communication terminal 100 and does not own the communication terminal 200.

  FIG. 2 is a block diagram illustrating a hardware configuration of the communication terminal 100. As shown in the figure, the communication terminal 100 includes a control unit 110, a storage unit 120, a display unit 130, an operation unit 140, a communication unit 150, and a positioning unit 160. The control unit 110 includes an arithmetic processing device such as a CPU (Central Processing Unit) and a memory, and controls the operation of each unit of the communication terminal 100 by executing a program stored in advance. The storage unit 120 includes a storage medium such as a hard disk, and stores data necessary for the control unit 110 to operate. The display unit 130 includes a display device such as a liquid crystal display, and displays an image according to screen information. The operation unit 140 includes a keyboard and a pointing device for receiving a user operation, and generates operation information corresponding to the user operation. The communication unit 150 includes an interface that communicates with the network NW1, and transmits and receives data to and from the server device 300. The positioning unit 160 acquires position information by a predetermined method. The positioning unit 160 of the present embodiment acquires position information by the GPS method. Here, the GPS system refers to a system for obtaining coordinates (latitude and longitude) of a radio wave reception place based on radio waves from a so-called GPS (Global Positioning System) satellite. Therefore, the position information of the present embodiment represents the latitude and longitude of the communication terminal 100 when receiving radio waves.

  FIG. 3 is a block diagram illustrating a hardware configuration of the communication terminal 200. As shown in the figure, the communication terminal 200 includes a control unit 210, a storage unit 220, a display unit 230, an operation unit 240, a communication unit 250, and a positioning unit 260. Each of these units has a function in common with the component having the same name of the communication terminal 100. However, the communication terminal 200 is different from the communication terminal 100 in that the function to be realized is more limited than the communication terminal 100.

  The communication terminal 200 has at least functions related to display or operation. For example, the display unit 230 has a smaller display area than the display unit 130. Alternatively, the display area 230 has fewer displayable colors and resolution than the display unit 130. Further, the operation unit 240 is configured such that some of the operations that can be performed by the operation unit 140 cannot be performed. These are all examples of “restrictions” in the present invention.

  Note that the limitation of the function may be software rather than hardware. That is, the limitation of the function may be realized by the control unit 210 limiting the image size or the number of colors or invalidating some operations (possible in the communication terminal 100). Alternatively, the limitation of the function may be realized in a mode in which a password or the like must be input every time each operation is performed. Further, the function restriction may be performed on the server device 300 side such that a result corresponding to the operation requested by the communication terminal 200 is not returned. Further, the communication terminal 200 may be a browsing communication terminal, and operation may not be performed depending on the communication terminal 200.

  FIG. 4 is a block diagram illustrating a hardware configuration of the server apparatus 300. As shown in the figure, the server device 300 includes a control unit 310, a storage unit 320, and a communication unit 330. The control unit 310 includes an arithmetic processing unit and a memory, and controls the operation of each unit of the server device 300 by executing a program stored in advance. The storage unit 320 includes a storage medium and stores data necessary for the control unit 310 to operate. The data stored in the storage unit 320 includes a work application program, switching position information, operation information, and error information, which will be described later. The communication unit 330 includes an interface that communicates with the network NW1, and transmits and receives data to and from the communication terminals 100 and 200.

  The switching position information is information representing a position where communication is switched (hereinafter referred to as “switching position”). The switching position information of the present embodiment describes a position where communication may not be switched (hereinafter referred to as “permitted position”), and adopts a data structure that can specify the switching position. That is, in the present embodiment, a position that is not a permitted position is a switching position. Use of the communication terminal 100 is restricted at the switching position, and use of the communication terminal 100 is not restricted at the permitted position. Note that the switching position information may describe the switching position instead of the permitted position.

FIG. 5 is a diagram illustrating switching position information according to the present embodiment. The switching position information of the present embodiment describes the permitted position for each user. Here, the permitted position is described by latitude and longitude. The permitted position does not represent a specific point, but is preferably described as a range having a spread. The user is identified by user identification information uniquely assigned to each user. Here, for convenience of explanation, the user identification information is represented as “A” or “B”. User identification information includes a correspondence between the terminal identification information described later, the correspondence relationship is stored in advance in the storage unit 320 thereof.
Note that the permission position may be common to a plurality of users. Further, the permitted position may include those described in advance in the storage unit 320 and those registered by the user.

  The operation information is information indicating a coping method for each user at the switching position. The coping method in the present embodiment includes a first method for switching the communication target from the communication terminal 100 to the communication terminal 200 when the position information transitions from the permitted position to the switching position, and the position information from the permitted position to the switching position. There is a second method for prohibiting communication when a transition occurs.

  FIG. 6 is a diagram illustrating operation information of this embodiment. In the example shown in the figure, the first method is applied to the user A and the second method is applied to the user B at the switching position. When the first method is applied, terminal identification information (telephone number, IP address, etc.) for identifying the communication terminal 200 corresponding to the communication switching destination is described as the operation information.

The error information is information indicating a range of error allowed in the position determination. When the error information is used, the server apparatus 300 allows a mismatch between the position information and the communication control within the error range indicated by the error information when the position information transitions from the permitted position to the switching position. That is, when the error information is used, the server device 300, even when the position information transitions from the permitted position to the switching position, if the switching position is within a predetermined distance range permitted from the permitted position, Even if the position information is the switching position, the operation described in the operation information is not performed.
The error information may be a different value for each permitted position or for each user. Further, the server device 300 may perform communication control without using error information.

  FIG. 7 is a functional block diagram illustrating functions realized by the server apparatus 300. The control unit 310 of the server device 300 executes the program, thereby operating information acquisition unit 311, process execution unit 312, screen information supply unit 313, position information acquisition unit 314, switching position information acquisition unit 315, and the like shown in FIG. A function corresponding to the determination unit 316 is realized.

  The operation information acquisition unit 311 acquires operation information from the communication terminal 100 or 200 via the communication unit 330. The process execution unit 312 executes a process according to the operation represented by the operation information acquired by the operation information acquisition unit 311. The processing executed by the processing execution unit 312 includes location registration processing, application execution processing, and communication control processing, which will be described later. The screen information supply unit 313 supplies screen information for transmission to the communication terminal 100 or 200 to the communication unit 330. More specifically, the screen information supply unit 313 includes a first supply unit 3131 that supplies screen information transmitted to the communication terminal 100 and a second supply unit 3132 that supplies screen information transmitted to the communication terminal 200. being classified. The screen information supply unit 313 supplies screen information to the communication terminal to which the operation information is transmitted, and switches the screen information supply destination according to the determination result by the determination unit 316.

  The position information acquisition unit 314 acquires position information from the communication terminal 100 or 200 via the communication unit 330. The switching position information acquisition unit 315 acquires the switching position information stored in the storage unit 320. The determination unit 316 performs determination regarding the position of the communication terminal 100 or 200 based on the position information acquired by the position information acquisition unit 314 and the switching position information acquired by the switching position information acquisition unit 315.

  The configuration of the communication system 10 of the present embodiment is as described above. Under this configuration, the user uses the communication terminal 100 to perform predetermined work such as business. The work here is performed by executing the work application program, but it is not the communication terminal 100 but the server apparatus 300 that executes the work application program. At this time, the communication terminal 100 functions as a means for providing a user interface to the user. This embodiment is based on the premise that at least one of the communication terminals 100 and 200 is at hand when the user carries the communication terminals 100 and 200 and performs work.

  In principle, the server device 300 permits the execution of work without restriction when the user is in the permitted position, and restricts the execution of work when the user moves from the permitted position to the switching position. However, since the server apparatus 300 cannot specify the actual position of the user, the server apparatus 300 determines the presence or absence of the restriction using the position information of the communication terminal 100 or 200. The limitation in this embodiment is performed by either the first or second method described above.

  In addition to the preset positions in the present embodiment, there are those that are set in response to a user request. The user registers a place name where the user wants to work using the communication terminal 100, or goes to a place where he / she wants to work with the communication terminal 100 and transmits position information from the place. can do. The process of registering the permitted position in this way is hereinafter referred to as “position registration process”.

  FIG. 8 is a diagram illustrating a screen displayed on communication terminal 100 when performing the location registration process. The screen shown in the figure is displayed on the display unit 130 of the communication terminal 100, and the user can select either the button BT1 or BT2 by an operation. The button BT1 is a button that is selected when a permitted position is registered by inputting a place name (address or the like). When the button BT1 is selected, the control unit 110 of the communication terminal 100 displays a screen for inputting a place name on the display unit 130, and transmits the operation information generated by the operation unit 140 to the server device 300. The button BT2 is a button that is selected when the permitted position is registered using position information obtained by positioning by the positioning unit 160. When button BT2 is selected, control unit 110 of communication terminal 100 causes positioning unit 160 to perform positioning (acquisition of position information), and transmits the obtained position information to server apparatus 300 as operation information.

  FIG. 9 is a flowchart showing the location registration process executed by the server device 300. The control unit 310 of the server apparatus 300 starts the location registration process when acquiring the operation information based on the screen shown in FIG. When acquiring the operation information (step S11), the control unit 310 specifies the position represented by the operation information (step S12). When the acquired operation information represents a place name, the control unit 310 specifies coordinates corresponding to the place name. Any known method may be used as a method for specifying coordinates.

  When the position requested by the user as the permitted position is specified, control unit 310 sets an allowable error for the specified position (step S13). The error set at this time may be a fixed value determined in advance, or may be a different value for each position requested by the user. For example, when the position request by the user is based on the position information, the control unit 310 may allow a larger (wider) error than when the request is based on the place name. Good. When the position and error are specified in this way, the control unit 310 writes the specified result in the switching position information and error information of the storage unit 320 (step S14). This operation of writing (that is, storing) in the storage unit 320 is referred to as “registration” herein.

  It should be noted that there may be a restriction on the positions that can be registered as the permitted positions. For example, if the server apparatus 300 stores in advance a position that cannot be registered as a permitted position (hereinafter referred to as “prohibited position”), and the position requested by the user for registration is a prohibited position, the server apparatus 300 requests the user. In this case, it may not be possible to register as a permitted position. In addition to the position registration process described above, the administrator of the communication system 10 may determine whether or not to register as a permitted position, and the determination result may be reflected in the switching position information.

  The user performs work using the communication terminal 100 at the permitted position registered in this way. A program for performing this work is a work application program. The work application program here is, for example, one for creating a document or one for inputting data to a database provided in the server apparatus 300, but the specific function to be realized is not particularly limited. .

  The server apparatus 300 transmits screen information to the communication terminal 100 by executing the work application program. This screen information represents a screen for accepting an operation performed by the user in the communication terminal 100, and includes, for example, buttons as illustrated in FIG. When the communication terminal 100 displays a screen corresponding to the screen information and accepts an operation, the communication terminal 100 transmits the operation information. When the server device 300 receives the operation information, the server device 300 executes processing corresponding to the operation represented by the operation information, and transmits screen information corresponding to the execution result to the communication terminal 100.

  In the application execution process, such data exchange is repeated between the communication terminal 100 and the server device 300. Further, the server apparatus 300 acquires position information from the communication terminals 100 and 200 during execution of the application execution process, and prepares for a communication control process described later. For this reason, the communication terminals 100 and 200 repeatedly transmit position information to the server device 300. At this time, the communication terminals 100 and 200 transmit user identification information or terminal identification information together. The transmission of the position information is desirably periodic.

  FIG. 10 is a flowchart showing communication control processing executed by the server device 300. When the control unit 310 of the server device 300 acquires the position information (step S21), whether or not the positional relationship between the communication terminal 100 and the communication terminal 200 satisfies a condition for switching communication (hereinafter referred to as “switching condition”). A condition determination process is performed to determine whether or not (step S22). Then, when the switching condition is satisfied (step S23: YES), the control unit 310 restricts execution of the work application program by performing processing corresponding to the operation information on the corresponding communication terminal 100 (step S24). ) If the switching condition is not satisfied (step S23: NO), the execution of the work application program is not restricted.

  FIG. 11 is a flowchart showing the condition determination process in step S22. Here, for convenience of explanation, explanation is given without considering error information. In the condition determination process, the control unit 310 first determines whether or not the position represented by the position information of the communication terminal 100 (hereinafter referred to as “first position information”) is a switching position (step S221). Subsequently, it is determined whether or not the position represented by the position information of the communication terminal 200 (hereinafter referred to as “second position information”) is a switching position (steps S222 and S225).

When both the first and second position information indicate the switching position (step S221: YES, step S222: YES), the control unit 310 considers that the user has moved to the switching position together with the communication terminals 100 and 200, and switched. It is determined that the condition is satisfied (step S223).
On the other hand, when the first position information represents the switching position and the second position information does not represent the switching position (step S221: YES, step S222: NO), the control unit 310 causes the communication terminal 200 to be in the permitted position. It is determined that the user has moved to the switching position together with the communication terminal 100 while left unattended, and it is determined that the switching condition is satisfied (step S224).

Further, when the first position information does not represent the switching position and the second position information represents the switching position (step S221: NO, step S225: YES), the control unit 310 causes the communication terminal 100 to be in the permitted position. It is determined that the user has moved to the switching position together with the communication terminal 200 while left unattended, and it is determined that the switching condition is satisfied (step S226).
On the other hand, when neither the first position information nor the second position information represents the switching position (step S221: NO, step S225: NO), the control unit 310 has the user at the permitted position together with the communication terminals 100 and 200. It is determined that the switching condition is not satisfied (step S227).

Here, when the control unit 310 determines that the switching condition is satisfied, there are three types of steps S223, S224, and S226. Control unit 310, in the process of step S 2 24, the determination result in triplicate may perform common limitation, it can be performed to limit the different embodiments in accordance with each of the three types of determination results It is. For example, in the case of step S224, it can be said that there is a high possibility that the user is moving without having the communication terminal 200. Therefore, in this case, control unit 310 may end communication itself instead of switching the communication partner from communication terminal 100 to communication terminal 200.

  In addition, since the communication terminal 100 of this embodiment is a thin client, when the server apparatus 300 switches the communication partner to the communication terminal 200, the display of the screen may not be changed only by the communication terminal 100. is there. In such a case, the server apparatus 300 switches the communication partner from the communication terminal 100 to the communication terminal 200 and displays the display related to the execution of the work application program in place of the screen information that has been transmitted to the communication terminal 100 so far. Alternatively, it is desirable to transmit screen information for limiting operations. Such screen information is typically image information representing a screen on which nothing is displayed, but may represent a screen that invalidates some operations. Alternatively, the power supply of the communication terminal 100 may be controlled from the server device 300 side so that the communication terminal 100 does not operate.

  As described above, according to the communication system 10 of this embodiment, when the user moves from the permitted position to the switching position, the execution of the work application program is restricted. Therefore, at the switching position, work by the communication terminal 100 cannot be performed, or work is performed by the communication terminal 200 with functions related to display or operation more limited than the communication terminal 100. The risk of information leaking to the person is reduced. For example, if the screen for the user to work becomes smaller, there is less risk of information being stolen by others than when working on a larger screen. In addition, according to the communication system 10 of the present embodiment, information cannot be accessed at the switching position at all. Therefore, the convenience of the user is improved compared to a system that allows access to information only at a predetermined position. Can be made.

  Moreover, according to the communication system 10 of this embodiment, even when the user has left the communication terminal 100 misplaced due to negligence, the communication is switched according to the position of the communication terminal 200. Therefore, according to this communication system 10, in such a case, it is possible to prevent the communication terminal 100 from being operated arbitrarily by another person. Even if the communication terminal 100 is taken away by another person, there is no possibility that the data is illegally read because there is no data related to the work in the communication terminal 100 itself.

  The above description assumes that the user moves from the permitted position to the switching position. When the user moves from the switching position to the permitted position, the server apparatus 300 may switch the communication partner from the communication terminal 200 to the communication terminal 100 and release the restriction that has been applied to the communication terminal 200. .

[Modification]
The present invention is not limited to the above-described embodiment, and can be implemented by other aspects. The present invention can also be implemented by, for example, embodiments of the following examples. Note that the present invention may be applied in combination of these modifications.

(Modification 1)
The switching condition of the present invention can also be determined by using only the first position information without using the second position information. For example, in the above-described communication control process (see FIG. 10), if the communication terminal 100 (first communication terminal) and the communication terminal 200 (second communication terminal) are considered to be at substantially the same position, It is possible to substitute the position information of 2 with the first position information.

  The switching condition of the present invention may be determined by the relative positional relationship between the first communication terminal and the second communication terminal. In this aspect, for example, when the first communication terminal and the second communication terminal are separated by a predetermined distance or more, the switching condition is satisfied. The distance between the first communication terminal and the second communication terminal may be specified based on the respective position information, or short-range wireless communication means capable of communicating within a predetermined distance is provided in each communication terminal. The switching condition may be considered to be satisfied when communication by such short-range wireless communication means becomes impossible.

(Modification 2)
The switching condition of the present invention may be determined based on the positional relationship of a third communication terminal different from these in addition to the positional relationship of the first and second communication terminals. Here, the third communication terminal is a communication terminal owned by a different person from the users of the first and second communication terminals. For example, the server device of the present invention displays or operates the first or second communication terminal when it is detected that the third communication terminal exists in the vicinity of either the first or second communication terminal. May be restricted. In this way, it is possible to reduce the risk of information being stolen by others. Note that the position of the third communication terminal can be specified by the position information and the short-range wireless communication means described above. In addition, the first or second communication terminal is provided with means for collecting voice (such as a microphone), and when another person's voice or sound is detected, it is determined that the other person (and the communication terminal) is present in the vicinity. Also good.

(Modification 3)
The location registration process of the present invention is convenient for the user if it is linked with a so-called scheduler (an application program for the user to manage the schedule).
FIG. 12 is a diagram illustrating a screen displayed by the scheduler. The user inputs a schedule such as a business trip using the screen shown in FIG. The input contents include date and place, and these are transmitted to the server device as operation information. Based on this operation information, the server device registers the location input by the user as the permitted position.
Note that this permission position is valid only on the date and time input by the user, and other than that date and time may be registered as a switching position. That is, the switching position (or permission position) of the present invention can be changed with the passage of time.

(Modification 4)
In the present invention, the method for acquiring position information is not limited to the GPS method. For example, when the communication terminal uses a mobile communication network, a base station positioning method can be used. Here, the base station positioning method is a method for obtaining the position of the communication terminal based on information unique to a node (base station) communicating with the communication terminal in the mobile communication network. From the base station, for example, the address of the location where the base station is installed may be transmitted, but identification information (cell ID) for identifying the base station is transmitted, and the server device is based on this identification information. The position may be specified. Similarly, when the communication terminal uses a wireless LAN (Local Area Network), the position can be obtained from information unique to each base station (access point) of the wireless LAN.

(Modification 5)
The present invention can also be applied to communication control of a communication terminal that is not a thin client. That is, the present invention may be an aspect in which the application is executed on the communication terminal side and the communication control apparatus executes the communication control process described above. For example, the present invention can be applied to browsing web pages.

  The communication control device according to the present invention functions as a relay device that relays communication between the communication terminal and the server device. The communication control processing described above is executed in the relay device, and the application execution processing described above is executed in the server device. It may be executed. Therefore, the communication control apparatus according to the present invention only needs to execute the communication control process described above and switch the communication partner, and does not involve the execution of the position registration process or the application execution process described above. Good.

  The present invention can also be specified as a program for causing a computer such as a server device to realize the communication control process described above. Such a program may be provided in a form recorded on a recording medium such as an optical disk or a flash memory, or downloaded to a computer via a network such as the Internet.

DESCRIPTION OF SYMBOLS 10 ... Communication system, 100, 200 ... Communication terminal, 300 ... Server apparatus, 310 ... Control part, 311 ... Operation information acquisition part, 312 ... Process execution part, 313 ... Screen information supply part, 3131 ... 1st supply part (1st 1 supply means), 3132... Second supply section (second supply means), 314... Position information acquisition section (first acquisition means), 315... Switching position information acquisition section (second acquisition means), 316 ... determination unit (first determination unit, second determination unit), 320 ... storage unit, 330 ... communication unit (first transmission unit, second transmission unit)

Claims (8)

First transmission means for transmitting first screen information for receiving an operation in the first communication terminal to the terminal;
First acquisition means for acquiring position information representing the position of the first communication terminal;
Second acquisition means for acquiring switching position information representing a switching position that is a position for switching a transmission destination of screen information;
When the position represented by the position information acquired by the first acquisition unit is the switching position represented by the switching position information acquired by the second acquisition unit, the display unit performs display or operation from the first communication terminal. A communication control apparatus comprising: a second transmission unit configured to transmit second screen information corresponding to the first screen information to a second communication terminal whose function is restricted. The first acquisition means acquires first position information representing a position of the first communication terminal and second position information representing a position of the second communication terminal;
The second transmission means comprises:
When both the positions represented by the first and second position information acquired by the first acquisition means are the switching positions, the second screen information is transmitted to the second communication terminal,
The second screen information is not transmitted to the second communication terminal when none of the positions represented by the first and second position information acquired by the first acquisition means is the switching position. The communication control device according to claim 1. Comprising: first determination means for determining whether a positional relationship between the first communication terminal and the second communication terminal satisfies a predetermined condition;
The second transmission means comprises:
2. The second screen information is transmitted to the second communication terminal when the first determination unit determines that the positional relationship satisfies the predetermined condition. 3. Communication control device. Second determination means for determining whether or not a third communication terminal different from any of the first and second terminals exists within a predetermined distance from the first or second communication terminal; Prepared,
The first or second transmission means is
When the second determination means determines that the third communication terminal is within the predetermined distance range, the first or second screen information is used instead of the first or second screen information. 4. The communication control apparatus according to claim 1, wherein screen information for limiting display or operation by the communication terminal is transmitted. The first transmission means comprises:
When the second screen information is transmitted by the second transmission means, instead of the first screen information, screen information for restricting display or operation by the first communication terminal is transmitted. The communication control device according to claim 1, wherein A server device, a first communication terminal that communicates with the server device, and a second communication terminal that communicates with the server device and has a function related to display or operation restricted by the first communication terminal. Have
The first communication terminal is
First display means for displaying an image represented by the screen information;
First generation means for generating operation information corresponding to the received operation;
First communication means for receiving the image information and transmitting operation information generated by the generation means,
The second communication terminal is
Second display means for displaying an image represented by the screen information;
Second communication means for receiving the image information,
The server device
First acquisition means for acquiring position information representing the position of the first communication terminal;
Second acquisition means for acquiring switching position information representing a switching position that is a position for switching communication;
Third communication means for communicating with the first and second communication terminals;
Processing execution means for executing processing according to the operation information transmitted from the first communication terminal,
The third communication means is
Transmitting first screen information for accepting an operation to the first communication terminal;
A second screen different from the first screen information when the position represented by the position information acquired by the first acquisition unit is a switching position represented by the switching position information acquired by the second acquisition unit; A communication system, wherein information is transmitted to the second communication terminal. The first communication terminal existing at a predetermined position receives the first screen information from the server device, and transmits operation information representing an operation accepted based on the first screen information to the server device. ,
The server device executes processing according to the operation information,
When the first communication terminal moves from the predetermined position to a switching position that is a position to switch communication and is a position represented by the switching position information, the server device performs the first communication. A communication switching method, wherein second screen information corresponding to the first screen information is transmitted from a terminal to a second communication terminal in which a function related to display or operation is restricted. Computer
First supply means for supplying first screen information transmitted to the terminal in order to accept an operation in the first communication terminal;
First acquisition means for acquiring position information representing the position of the first communication terminal;
Second acquisition means for acquiring switching position information representing a switching position that is a position for switching a transmission destination of screen information;
When the position represented by the position information acquired by the first acquisition unit is the switching position represented by the switching position information acquired by the second acquisition unit, the display unit performs display or operation from the first communication terminal. Second screen information transmitted to a second communication terminal whose function is restricted, and for functioning as second supply means for supplying second screen information corresponding to the first screen information program.

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