JP5220519B2 - Communication system and VPN communication terminal - Google Patents

Description

  The present invention relates to a communication system and a VPN communication terminal for performing communication via a wireless line or a wired or wireless line such as a telephone line.

  Communication terminals that are connectable to both a public line network (hereinafter, sometimes referred to as “public network”) and a private line network (hereinafter, also referred to as “private network”) are known. The public line network is, for example, a so-called external line, which is a line network provided by a communication carrier over a wide range. The self-operated line network is, for example, a so-called extension line, which is a line network built by an organization such as a company in its own office. There is also known a virtual private network (VPN) that can use a public network as if it were a private network.

In Patent Document 1, in a private branch exchange network (private network) that uses a desk phone and a mobile terminal as a pair, when the subscriber leaves the mobile terminal, the position of the subscriber is called the caller. And a technique for notifying a person on the premises.
JP-A-6-188986

  In the conventional VPN, the call source user (communication terminal) cannot know whether the call destination communication terminal exists in the private network or the public network before the call starts. Moreover, patent document 1 is a technique which concerns on a private network, and is not mentioned about said subject.

  An object of the present invention is to provide a communication system and a VPN communication terminal capable of notifying whether a communication partner exists in a public network or a private network.

A communication system according to a first aspect of the present invention includes a plurality of VPN communication terminals that can be wirelessly connected to a public line network and a private line network, and each of the plurality of VPN communication terminals includes the private line network and the public line network. A VPN communication management device having area information acquisition means for acquiring area information indicating which one of the VPN communication is performed, and when the first VPN communication terminal makes a call to the second VPN communication terminal, the VPN communication The management device, from the first VPN communication terminal to the second VPN communication terminal, based on area information indicating whether the private line network or the public line network is acquired by the area information acquisition unit During the call, the first VPN communication terminal is notified of area information indicating whether the second VPN communication terminal is in the private line network or the public line network .

A communication system according to a second aspect of the present invention includes a plurality of VPN communication terminals that can be wirelessly connected to a public line network and a private line network, and each of the plurality of VPN communication terminals includes the private line network and the public line network. A VPN communication management device having area information acquisition means for acquiring area information indicating which one of the VPN communication is performed, and when the first VPN communication terminal makes a call to the second VPN communication terminal, the VPN communication The management device, from the first VPN communication terminal to the second VPN communication terminal, based on area information indicating whether the private line network or the public line network is acquired by the area information acquisition unit During the call, the second VPN communication terminal is notified of area information indicating whether the first VPN communication terminal is in the private line network or the public line network .

  Preferably, the VPN communication management device is a PBX of the private network or an exchange station of the public network.

The VPN communication terminal of the present invention is a VPN communication terminal connectable to the communication system described above, and is area information indicating whether the private communication network or the public network notified from the VPN communication management device And an informing means for informing area information indicating whether the network is in the private network or the public network .

  Preferably, the area information notification means is at least one of a reception unit, ringing unit, light emitting unit, and display unit of the VPN communication terminal.

  According to the present invention, it is possible to notify whether a communication partner exists in a public network or a private network.

(First embodiment)
FIG. 1 is a conceptual diagram showing a schematic configuration of a communication system 1 according to the first embodiment of the present invention. 1A, 1B, and 1C show different states as will be described later.

  The communication system 1 has a private network 3 and a public network 5. In addition, the communication system 1 may be abbreviated as “PS” (Personal Station), which can be wirelessly connected to the private network 3 and the public network 5 (two are illustrated in the figure). 7A and 7B (hereinafter, A and B may be omitted).

  The wireless communication terminal 7 is, for example, a mobile terminal such as a mobile phone, a PDA, or a laptop computer. In the following description, it is assumed that the wireless communication terminal 7 is a mobile phone.

  The private network 3 includes a private branch exchange (hereinafter abbreviated as “PBX” (Private Branch eXchange)) 9, a plurality of wired communication terminals 10 (only one is shown) connected to the PBX 9, and a PBX 9. And an antenna 11 for connecting the wireless communication terminal 7 wirelessly.

  The PBX 9 connects the wireless communication terminals 7, the wired communication terminals 10, or the wireless communication terminal 7 and the wired communication terminal 10, and enables communication (call) between the terminals. Further, the PBX 9 is connected to the public network 5, and whether the wireless communication terminal 7 outside the private network 3 is in the private network 3 even when the wireless communication terminal 7 is outside the private network 3. Such communication is possible.

  The antenna 11 is connected to the PBX 9 by wire and transmits / receives radio waves to / from the wireless communication terminal 7 within a predetermined range, thereby enabling wireless communication between the wireless communication terminal 7 and the PBX 9. The predetermined range is, for example, the place of business of the business having the private network 3. A plurality of antennas 11 may be provided in the private network 3.

  Note that the time when the wireless communication terminal 7 is outside the private network 3 is, for example, when the wireless communication terminal 7 is in a position where radio waves cannot be transmitted to or received from the antenna 11. Or, when the user is outside the range recognized by the user as being within the private network 3, such as within a range where a plurality of wired communication terminals 10 exist (inside a building or office).

  The public network 5 includes a plurality of base stations (hereinafter abbreviated as “CS” (Cell Station)) 13A to 13C (hereinafter, A to C may be omitted). ) And a switching station (hereinafter abbreviated as “EX” (exchange)) 15 that connects a plurality of base stations 13.

  The base station 13 transmits and receives radio waves to and from the wireless communication terminal 7 within a predetermined range (cell). The cell has a diameter in the range of several tens of meters to several hundreds of meters or several kilometers, for example. The plurality of base stations 13 are arranged over a relatively wide range (for example, a range having a diameter of several hundred km) so that no gap is generated between the plurality of cells. Further, the base station 13 is connected to the exchange 15 by wireless, wired, or both.

  The exchange 15 selectively connects a plurality of base stations 13 to each other. Thereby, wireless communication in the public network 5 between the wireless communication terminals 7 becomes possible. Actually, a plurality of switching centers 15 are provided in a hierarchical manner. In addition, the exchange 15 holds and updates information on which base station 13 the wireless communication terminal 7 is in.

  One of the base stations 13 (13A in the figure) is connected to the PBX 9 by wireless or wired or both. Note that the base station 13A may transmit and receive radio waves only with the PBX 9 via a wired dedicated line without transmitting and receiving radio waves to and from the wireless communication terminal 7. That is, the base station 13 may be a dedicated machine for connecting the private network 3 to the public network 5. However, in the following, the base station 13A can transmit and receive radio waves to and from the wireless communication terminal 7, and the wireless communication terminal 7 located in the private network 3 is located in the cell of the base station 13A. It will be described as being.

  The wireless communication terminal 7 is called while performing transmission / reception of radio waves to / from the PBX 9 via the antenna 11 while waiting for the call to be called and directly transmitting / receiving radio waves to / from the public network 5 without passing through the PBX 9. It is possible to selectively or in parallel with the standby operation for waiting for the above. In the following description, it is assumed that the wireless communication terminal 7 performs so-called dual standby in which both standby operations are performed in parallel.

  The operation of the communication system 1 having the above configuration will be described.

  FIG. 1A shows an operation when a call is made from the wireless communication terminal 7A to the wireless communication terminal 7B when both the wireless communication terminals 7A and 7B are in the private network 3.

  The radio communication terminal 7A selectively selects a call that inputs the extension number of the radio communication terminal 7B and calls the radio communication terminal 7B, and a call that inputs the external line number of the radio communication terminal 7B and calls the radio communication terminal 7B. Can be done. Since the extension number corresponds to the identification information of the wireless communication terminal 7 in the private network 3 and the outside line number corresponds to the identification information of the wireless communication terminal 7 in the public network 5, the number is not distinguished from the identification information below. There is.

  When a call is made with an extension number in the radio communication terminal 7A, the radio communication terminal 7A calls the radio communication terminal 7B via the PBX 9, as indicated by a solid arrow y1. In addition, a call is performed by a bidirectional signal on the route. The public network 5 is not involved in calling or calling the wireless communication terminals 7A and 7B.

  In the wireless communication terminal 7A, when a call is made with an outside line number, the wireless communication terminal 7A sequentially selects the base station 13A, the switching center 15, and (again) the base station 13A, as indicated by the dotted arrow y2. Via this, the wireless communication terminal 7B is called. In addition, a call is performed by a bidirectional signal on the route. At this time, the private network 3 is not involved in calling or calling the wireless communication terminals 7A and 7B.

  When calling from the wireless communication terminal 7B to the wireless communication terminal 7A using the extension number or the external line number, the same as when calling the wireless communication terminal 7B from the wireless communication terminal 7A, except that the order of the routes is reversed. is there.

  FIG. 1B shows that when the wireless communication terminal 7A is in the private network 3 and the wireless communication terminal 7B is outside the private network 3 (in the public network 5), the wireless communication terminal 7A issues the wireless communication terminal 7B. The operation when called is shown.

  When a call is made with an extension number in the wireless communication terminal 7A, the wireless communication terminal 7A is connected to the PBX 9, the base station 13A, the switching center 15, and the wireless communication terminal 7B to the cell as indicated by the solid line arrow y1. The wireless communication terminal 7B is called through the base stations 13 (13C in this case) in order. In addition, a call is performed by a bidirectional signal on the route. In this way, a call is made to the wireless communication terminal 7B outside the private network 3 by the extension number, and so-called VPN is realized.

  When a call is made by an external line number in the radio communication terminal 7A, the call is made through the same route as in FIG. 1A except that the radio communication terminal 7B is changed in the base station 13 in the cell. And communication is performed. In addition, when the wireless communication terminal 7B calls the wireless communication terminal 7A using the extension number or the external line number, the wireless communication terminal 7A calls the wireless communication terminal 7B except that the route order is reversed. It is the same.

  FIG. 1C shows an operation when a call is made from the wireless communication terminal 7A to the wireless communication terminal 7B when both the wireless communication terminals 7A and 7B are outside the private network 3 (in the public network 5). Yes.

  When a call is made by an extension number in the wireless communication terminal 7A, as indicated by a solid arrow y1, the wireless communication terminal 7A is a base station 13 (13B in this case) in which the wireless communication terminal 7A is in the cell, The exchange station 15, the base station 13A, the PBX 9, (again) the base station 13A, (again) the exchange station 15, and the radio communication terminal 7B pass through the base station 13 (13C in this case) in the cell in order, Call communication terminal 7B. In this way, a call is made to the wireless communication terminal 7B outside the private network 3 by the extension number, and so-called VPN is realized.

  The reason why the call passes through the PBX 9 is that the PBX 9 holds information for associating the extension number with the outside line number, and the public network 5 needs to refer to the associated information. The call may be performed by a bidirectional signal in the above-described route, or may be performed by a bidirectional signal in the same route as that in the case of calling by an external line number.

  When a call is made by an external line number in the wireless communication terminal 7A, the call is made through the same route as in FIG. 1B except that the base station 13 in the cell is changed. And communication is performed. In addition, when the wireless communication terminal 7B calls the wireless communication terminal 7A using the extension number or the external line number, the wireless communication terminal 7A calls the wireless communication terminal 7B except that the route order is reversed. It is the same.

  The call destination radio communication terminal 7B obtains information indicating whether the call source radio communication terminal 7A has made a call with an extension number or a call with an external line number, and notifies the user. To do. For example, the wireless communication terminal 7B displays the extension number of the wireless communication terminal 7A in the case of a call by extension number, and the extension number of the wireless communication terminal 7A in the case of a call by an outside line number.

  The operation related to the wired communication terminal 10 is the same as when the wireless communication terminal 7 is in the private network 3 except that communication with the PBX 9 is performed via a wire, and the description thereof is omitted.

  In addition to the above-described operation, the communication system 1 allows the calling wireless communication terminal 7B to be connected to the private network 3 and the public network 5 to the calling wireless communication terminal 7A when a call is made by the extension number. Outputs information indicating the location. In other words, the communication system 1 transmits information that distinguishes whether the current state is the state of FIG. 1A or the state of FIGS. 1B and 1C to the wireless communication terminal. Output to 7A. The wireless communication terminal 7A notifies the user of the information.

  Further, in the communication system 1, when a call is made by an extension number, whether the call source wireless communication terminal 7B is located in the private network 3 or the public network 5 as the call destination wireless communication terminal 7B. The information indicating is output. In other words, the communication system 1 transmits the information for distinguishing whether the current state is the state of FIGS. 1A and 1B or the state of FIG. 1C to the wireless communication terminal. Output to 7B. The wireless communication terminal 7B notifies the user of the information.

  The output and notification of the area information is performed during a call. In the present application, “calling” refers to a period from when a radio wave for calling is output from the caller wireless communication terminal 7 to when a call is started.

  FIG. 2 is a conceptual block diagram showing an internal configuration of each component of the communication system 1 for realizing the notification operation. In FIG. 2, only one of the wireless communication terminal 7 and the base station 13 is illustrated.

  The PBX 9 includes a communication unit 21 that mainly executes processing related to calling, and a PBX side information acquisition unit 23 that generates information indicating whether the wireless communication terminal 7 is in the private network 3 or the public network 5. Yes.

  The communication unit 21 has number correspondence data 21a in which an extension number is associated with an outside line number. Accordingly, the extension number can be allocated to the wireless communication terminal 7 freely by the business operator of the private network 3.

  The PBX-side information acquisition unit 23 determines whether or not the wireless communication terminal 7 is in the private network 3 depending on whether or not the radio wave from the wireless communication terminal 7 can be received via the antenna 11, and indicates the determination result. Information (area information) is generated. This operation may be performed periodically or as necessary. In the following, it is assumed that the operation is performed periodically.

  The base station 13 has a CS-side information acquisition unit 25. The CS-side information acquisition unit 25 acquires the area information generated by the PBX-side information acquisition unit 23 directly from the PBX 9 or indirectly through another base station 13 and the exchange 15 as necessary. .

  The exchange 15 has an EX side information acquisition unit 27. The EX side information acquisition unit 27 acquires the area information generated by the PBX side information acquisition unit 23 via the base station 13 as necessary.

  The wireless communication terminal 7 includes a PS side information acquisition unit 29 and a notification unit 31. The PS side information acquisition unit 29 acquires the area information generated by the PBX side information acquisition unit 23 directly from the PBX 9 or indirectly through the base station 13 and the exchange 15.

  The notification unit 31 performs an operation for notifying the user of the information based on the information acquired by the PS side information acquisition unit 29. The notification unit 31 includes at least one of a reception unit, a ringing unit, a light emitting unit, and a display unit.

  FIG. 3 is a sequence diagram for explaining the operation of the communication system 1. In FIG. 3, only one base station 13 is shown.

  As shown in step S <b> 1, the PBX 9 determines whether or not the wireless communication terminal 7 is in the private network 3 (area information) based on whether or not radio waves periodically output from the wireless communication terminal 7 can be received. ) To get. The PBX 9 holds information for identifying the wireless communication terminal 7 (for example, an extension number) and the acquired information in association with each other.

  In step S2, the wireless communication terminal 7A makes a call with an extension number. When the wireless communication terminal 7A is in the private network 3, this call is made directly to the PBX 9, as shown in FIGS. 1 (a), 1 (b), and 3. When the wireless communication terminal 7A is outside the private network 3, it is indirectly performed on the PBX 9 via the public network 5, as shown in FIG. In this case, the public network 5 calls the PBX 9 based on the information specifying the private network 3 included in the signal from the wireless communication terminal 7A.

  In step S3, the PBX 9 specifies area information of the wireless communication terminal 7A and the wireless communication terminal 7B. Specifically, based on the extension numbers of the wireless communication terminal 7A and the wireless communication terminal 7B acquired from the signal from the wireless communication terminal 7A, the area information of the plurality of wireless communication terminals 7 generated in step S1 is searched, The area information of the communication terminal 7A and the wireless communication terminal 7B is specified. In step S3, the PBX 9 generates information by determining whether the wireless communication terminal 7A is in the private network 3 by receiving a call directly from the wireless communication terminal 7A and receiving a call. May be. Moreover, in step S3, it may investigate again whether the signal from the wireless communication terminal 7B can be received, and area information may be specified.

  In step S4, the PBX 9 notifies the wireless communication terminal 7A of the area information of the wireless communication terminal 7B specified in step S3. When the wireless communication terminal 7A is in the private network 3, the notification is made as shown in FIG. 3 and as shown by a white arrow y3 in FIGS. 1 (a) and 1 (b). To the wireless communication terminal 7A. When the wireless communication terminal 7A is outside the private network 3 (inside the public network 5), the notification is transmitted from the PBX 9 via the public network 5 as shown by a white arrow y3 in FIG. Indirectly to the terminal 7A. Specifically, the notification is made in order through the base station 13A, the exchange 15 and the base station 13 (13B in FIG. 1C) in which the wireless communication terminal 7A is in the cell.

  In step S5, the radio communication terminal 7A performs an operation for notifying the user of the notified information. The notification operation may be performed both when the call destination wireless communication terminal 7B is in the private network 3 and when it is in the public network 5, or only in one. Also good.

  In parallel with steps S4 and S5, steps S6 to S10 are executed. In steps S6 to S9, the PBX 9 calls the wireless communication terminal 7B and notifies the wireless communication terminal 7B of the area information of the wireless communication terminal 7A specified in step S3. When the wireless communication terminal 7B is in the private network 3, the call and notification are made directly from the PBX 9 to the wireless communication terminal 7B as shown by the arrow y1 and the hatched arrow y4 in FIG. . When the wireless communication terminal 7B is outside the private network 3 (inside the public network 5), as shown by arrows y1 and y4 in FIG. 3 and in FIGS. The notification is indirectly made from the PBX 9 to the wireless communication terminal 7A via the public network 5. Specifically, the notification sequentially passes through the base station 13A, the switching center 15, and the base station 13 in which the wireless communication terminal 7B is in the cell (13C in FIGS. 1B and 1C). It is done. In this case, the PBX 9 searches for an external line number corresponding to the extension number of the wireless communication terminal 7B included in the signal from the wireless communication terminal 7A, and calls the base station 13A.

  In step S10, the radio communication terminal 7B performs an operation for notifying the user of the notified information. The notification operation may be performed both when the caller wireless communication terminal 7A is in the private network 3 and when it is in the public network 5, or only in one. Also good.

  When the notification operation in step S5 is performed, the wireless communication terminal 7A performs a process of permitting a call (step S11). Until this permission processing is performed, even if the user of the wireless communication terminal 7B performs an operation in response to the call on the wireless communication terminal 7B, the calls of the wireless communication terminals 7A and 7B (step S13) are not performed. For example, the radio communication terminal 7A does not output radio waves for a call and does not output audio included in the received signal. Therefore, the notification operation in step S5 is necessarily performed during a call from the wireless communication terminal 7A to the wireless communication terminal 7B.

  Similarly, when the notification operation in step S10 is performed, the wireless communication terminal 7B performs a process of permitting a call (step S12). Until this permission processing is performed, even if the user of the wireless communication terminal 7B performs an operation in response to the call on the wireless communication terminal 7B, the calls of the wireless communication terminals 7A and 7B (step S13) are not performed. For example, the wireless communication terminal 7B does not output radio waves for a call and does not output sound included in the received signal. Therefore, the notification operation in step S10 is necessarily performed during a call from the wireless communication terminal 7A to the wireless communication terminal 7B.

  The call permission in steps S5 and S10 may be performed on the condition that the notification operation in steps S5 and S10 is started, or may be performed on the condition that the notification operation is continued to some extent. Then, it may be performed on condition that the notification operation that ends with a certain operation is completed.

  The notification operation in step S5 is performed as follows, for example.

  When the notification unit 31 is configured to include a receiving unit, that is, a speaker for calling, different messages and different ringing sounds depending on whether the call destination wireless communication terminal 7B is in the private network 3 or the public network 5 Etc. are output from the speaker for calls.

  When the notification unit 31 is configured to include a notification speaker as a ringing unit, different messages, different sounds, etc., depending on whether the call destination wireless communication terminal 7B is in the private network 3 or the public network 5 Is output. Moreover, when the alerting | reporting part 31 is comprised including the vibrator as a ringing part, only when the call destination radio | wireless communication terminal 7B exists in the public network 5, a vibrator is driven during a call.

  When the notification unit 31 includes the light emitting unit, the light emitting unit is turned on with a different lighting pattern depending on whether the call destination wireless communication terminal 7B is in the private network 3 or the public network 5, or The light emitting unit is turned on only when the called wireless communication terminal 7B is in the public network 5.

  The notification operation in step S10 is performed as follows, for example.

  When the notification unit 31 is configured to include a receiving unit, when the user performs an operation for making a call in response to the call to the wireless communication terminal 7B, the caller wireless communication terminal 7A is set to the private network 3. Depending on whether the message is on the public network 5 or on the public network 5, a different message is output.

  When the notification unit 31 includes a notification speaker as a ringing unit, different ringing sounds are output depending on whether the caller wireless communication terminal 7A is in the private network 3 or the public network 5. . In addition, when the notification unit 31 is configured to include a vibrator as a ringing unit, vibrations with different patterns or strengths depend on whether the caller wireless communication terminal 7A is in the private network 3 or the public network 5. Generated.

  When the notification unit 31 includes a light emitting unit, the light emitting unit is turned on with a different lighting pattern depending on whether the caller wireless communication terminal 7A is in the private network 3 or the public network 5, or The light emitting unit is turned on only when the called wireless communication terminal 7A is in the public network 5.

  When the notification unit 31 includes a display unit, for example, a liquid crystal display device or an organic EL display device, the message varies depending on whether the caller wireless communication terminal 7A is in the private network 3 or the public network 5 Is displayed.

  According to the first embodiment described above, the communication system 1 manages a plurality of VPN wireless communication terminals 7 that can be wirelessly connected to the public network 5 and the private network 3 and the plurality of wireless communication terminals 7. A communication system 1 including a PBX 9. The PBX 9 includes a PBX side information acquisition unit 23 that acquires area information of each of the plurality of wireless communication terminals 7. When a call is made from the wireless communication terminal 7A to the wireless communication terminal 7B, the PBX 9 performs wireless communication during a call from the wireless communication terminal 7A to the wireless communication terminal 7B based on the area information acquired by the PBX side information acquisition unit 23. The area information where the terminal 7B is located is notified to the wireless communication terminal 7A. Therefore, the user of the wireless communication terminal 7A can know the location of the wireless communication terminal 7B, that is, whether the wireless communication terminal 7B is in the private network 3 or the public network 5 before starting the call. As a result, for example, when the user of the wireless communication terminal 7A is in the public network 5, the user of the wireless communication terminal 7B can take into consideration such as simply transmitting a message. In addition, it is possible to make a call taking into account that the charge for the call varies depending on whether the call is within the private network 3 or not.

  Further, when a call is made from the wireless communication terminal 7A to the wireless communication terminal 7B, the PBX 9 is based on the area information acquired by the PBX side information acquisition unit 23 during the call from the wireless communication terminal 7A to the wireless communication terminal 7B. The area information where the wireless communication terminal 7A is located is notified to the wireless communication terminal 7B. Accordingly, the user of the wireless communication terminal 7B can make a call with the same consideration as described above.

  Since it is the PBX 9 that can obtain the area information, whether or not the wireless communication terminal 7 is in the private network 3 is accurately determined based on whether or not radio waves from the wireless communication terminal 7 can be received via the antenna 11. Can be identified.

  In the above embodiment, the wireless communication terminal 7A is an example of the first VPN communication terminal of the present invention, the wireless communication terminal 7B is an example of the second VPN communication terminal of the present invention, and PBX side information acquisition is performed. The unit 23 is an example of area information acquisition means.

(Second Embodiment)
FIG. 4 is a conceptual diagram showing a schematic configuration of the communication system 101 according to the second embodiment of the present invention. In addition, about the structure similar to 1st Embodiment, the same code | symbol as 1st Embodiment is attached | subjected and description is abbreviate | omitted.

  4 (a) to 4 (c) are similar to FIGS. 1 (a) to 1 (c), in a state where both the wireless communication terminals 7A and 7B are in the private network 103, the wireless communication terminal 7A Corresponding to the state in which the wireless communication terminal 7B is outside the private network 103 (in the public network 5) and the wireless communication terminals 7A and 7B are outside the private network 103 (in the public network 5). Yes.

  The second embodiment is different from the first embodiment in that the private network 103 does not have the antenna 11. As shown in FIG. 4A, when the wireless communication terminal 7 is in the private network 3, for example, when it is in the area where the plurality of wired communication terminals 10 are arranged, the wireless communication terminal 7 Is connected to the PBX 9 via a base station 13 (13A in this case).

  Similarly to the first embodiment, the wireless communication terminal 7 can make a call using an extension number and a call using an external number. The operation when a call is made by an outside line number is the same as that of the first embodiment, as indicated by the dotted arrow y2.

  As shown by the solid line arrow y1, the operation when the call is made by the extension number is the same as that shown in FIG. 4 (a) to FIG. 4 (c) except for the processing related to the area information. This is basically the same as the operation shown in FIG. The difference between FIG. 4A to FIG. 4C is only the difference between the base stations 13 in which the wireless communication terminals 7A and 7B are in the cell.

  Therefore, the wireless communication terminal 7 performs communication via the public network 5 regardless of the location. The operation related to the wired communication terminal 10 is the same as that of the first embodiment. Accordingly, the wired communication terminals 10 make a call without going through the public network 5.

  Also in the second embodiment, as in the first embodiment, the communication system 101 transmits a call destination wireless communication to the caller wireless communication terminal 7A when a call is made by an extension number. Information indicating whether the terminal 7B is in the private network 103 or the public network 5 is output. In other words, the communication system 101 transmits information for distinguishing whether the current state is the state of FIG. 4A or the states of FIG. 4B or 4C to the wireless communication terminal. Output to 7A.

  Similarly to the first embodiment, in the communication system 1, when a call is made by an extension number, the call source radio communication terminal 7 B is connected to the call source radio communication terminal 7 B by the private network 103. And information indicating whether the network is in the public network 5 or not. In other words, the communication system 1 transmits information for distinguishing whether the current state is the state of FIGS. 4A and 4B or the state of FIG. 4C to the wireless communication terminal. Output to 7B.

  However, these pieces of information are generated by the EX side information acquisition unit 27 (FIG. 2) of the exchange 15. The generated information is acquired by the PS-side information acquisition unit 29 (FIG. 2) of the wireless communication terminal 7 via the CS-side information acquisition unit 25 (FIG. 2) of the base station 13. The PBX side information acquisition unit 23 (FIG. 2) of the PBX 9 is used when transmitting area information to the wired communication terminal 10. In the second embodiment, the EX side information acquisition unit 27 is an example of an area information acquisition unit of the present invention.

  FIG. 5 is a sequence diagram for explaining the operation of the communication system 1. In FIG. 5, only one base station 13 is shown.

  As shown in step S <b> 21, the exchange 15 identifies the base station 13 having the strongest reception strength based on the reception strength of radio waves periodically output from the wireless communication terminal 7. That is, the switching center 15 acquires information (area information) indicating which base station 13 the wireless communication terminal 7 is in. The exchange 15 stores information for identifying the wireless communication terminal 7 (for example, an outside line number) and the acquired information in association with each other.

  In steps S22 to S25, calling by extension number is performed in the radio communication terminal 7A. The call is indirectly made to the PBX 9 regardless of whether or not the wireless communication terminal 7A is in the private network 103, as shown in FIGS. 4 (a) to 4 (c). Specifically, the radio communication terminal 7A is performed in order through the base station 13, the exchange 15 and the base station 13A connected to the PBX 9 in the cell. The public network 5 calls the PBX 9 based on the information specifying the private network 103 included in the signal from the wireless communication terminal 7A.

  Also, in steps S26 to S27, as shown in FIGS. 4A to 4C, the base station from the PBX 9 regardless of whether or not the call destination wireless communication terminal 7B is in the private network 103. A call is made to the exchange 15 via 13. The PBX 9 specifies the external line number of the wireless communication terminal 7B based on the extension number of the wireless communication terminal 7B included in the signal from the wireless communication terminal 7A, and calls the switching center 15.

  In step S28, the switching center 15 specifies area information of the wireless communication terminal 7A and the wireless communication terminal 7B. Specifically, the area information of the plurality of wireless communication terminals 7 generated in step S21 is searched based on the external line numbers of the wireless communication terminals 7A and 7B acquired with the call, and the wireless communication terminal 7A and the wireless communication terminal 7B area information is specified. In step S28, the switching center 15 re-examines the base station 13 in which the cells are located based on the external line numbers of the wireless communication terminals 7A and 7B acquired along with the call. Information may be specified.

  In steps S29 and S30, the switching center 15 notifies the wireless communication terminal 7A of the area information of the wireless communication terminal 7B. The notification is made only through the base station 13 without going through the PBX 9, as indicated by the white arrow y3 in FIGS. 4 (a) to 4 (c).

  In step S32 and step S33, the switching center 15 calls the wireless communication terminal 7B and notifies the wireless communication terminal 7B of the area information of the wireless communication terminal 7A. The call and notification are made not through the PBX 9 but only through the base station 13, as indicated by the solid arrow y1 and the hatched arrow y4 in FIGS. 4 (a) to 4 (c).

  Steps S31 and S34 to S37 are the same as steps S5 and S10 to S13 of the first embodiment. For example, when the base station 13 in which the counterpart wireless communication terminal 7 is in the cell is the base station 13A connected to the PBX 9, the radio communication terminal 7 is specified by the area information. If it is determined that the communication terminal 7 is in the private network 3 and is a base station other than that, it is determined that the counterpart wireless communication terminal 7 is outside the private network 3. And the radio | wireless communication terminal 7 performs the alerting | reporting operation | movement similar to 1st Embodiment based on the determination result. The determination may be made by the exchange 15 and the determination result may be notified to the wireless communication terminal 7 as area information.

  According to the second embodiment described above, the same effect as in the first embodiment can be obtained. That is, the user of the caller wireless communication terminal 7A can determine whether the user of the callee wireless communication terminal 7B is in the private network 3 during the call. Further, the user of the callee wireless communication terminal 7B can determine whether the user of the caller wireless communication terminal 7A is in the private network 3 during the call. As a result, it is possible to make a call in consideration of various circumstances.

  The area information is generated in the exchange 15. Accordingly, even in the private network 103 in which the antenna 11 dedicated to the private network is not provided, it is possible to notify the user whether the private network 103 is in the private network 103 or not.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  In the case where the switching center of the public network generates the area information, the area information is not limited to information for specifying the base station in which the VPN communication terminal is in the cell. For example, the switching station may determine the position of the VPN communication terminal based on the principle of triangulation based on the reception strength of the signal from the VPN communication terminal at a plurality of base stations, and may use the position as area information. Further, the exchange station may use the location of the VPN communication terminal based on the GPS survey as area information. Further, the exchange or PBX compares the position of the VPN communication terminal based on the triangulation or GPS survey with the position of the pre-registered private network to determine whether the VPN communication terminal is in the private network. It is good also as judgment and making the judgment result into area information.

1 is a conceptual diagram showing a schematic configuration of a communication system according to a first embodiment of the present invention. The conceptual block diagram which shows the internal structure of each component of the communication system of FIG. The sequence diagram for demonstrating operation | movement of the communication system of FIG. The conceptual diagram which shows schematic structure of the communication system which concerns on the 2nd Embodiment of this invention. The sequence diagram for demonstrating operation | movement of the communication system of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Communication system 3,103 ... Private network (private network), 5 ... Public network (public network), 7A ... Wireless communication terminal (1st VPN communication terminal), 7B ... Wireless communication terminal (2nd (VPN communication terminal), 9 ... Private branch exchange (PBX, VPN communication management device), 11 ... Antenna, 13 ... Base station (CS), 15 ... Switching office (EX), 21 ... Communication unit, 21a ... Number correspondence data, 23 ... PBX side information acquisition unit (area information acquisition unit), 25 ... CS side information acquisition unit, 27 ... EX side information acquisition unit (area information acquisition unit), 29 ... PS side information acquisition unit, 31 ... notification unit.

Claims (5)

A plurality of VPN communication terminals that can be wirelessly connected to a public network and a private network;
A VPN communication management device having area information acquisition means for acquiring area information indicating whether each of the plurality of VPN communication terminals is in the private line network or the public line network ;
Have
When a call is made from the first VPN communication terminal to the second VPN communication terminal, the VPN communication management device
Based on the area information indicating whether the private line network or the public line network acquired by the area information acquisition means,
During a call from the first VPN communication terminal to the second VPN communication terminal,
Area information indicating whether the second VPN communication terminal is in the private line network or the public line network ,
A communication system that notifies the first VPN communication terminal. A plurality of VPN communication terminals that can be wirelessly connected to a public network and a private network;
A VPN communication management device having area information acquisition means for acquiring area information indicating whether each of the plurality of VPN communication terminals is in the private line network or the public line network ;
Have
When a call is made from the first VPN communication terminal to the second VPN communication terminal, the VPN communication management device
Based on the area information indicating whether the private line network or the public line network acquired by the area information acquisition means,
During a call from the first VPN communication terminal to the second VPN communication terminal,
Area information indicating whether the first VPN communication terminal is in the private line network or the public line network ,
A communication system that notifies the second VPN communication terminal. The communication system according to claim 1, wherein the VPN communication management device is a PBX of the private network or an exchange station of the public network. A VPN communication terminal connectable to the communication system according to any one of claims 1 to 3,
Based on the area information indicating whether it is in the private network or the public network notified from the VPN communication management device,
A VPN communication terminal having a notifying means for notifying area information indicating whether the private line network or the public line network is present . The VPN communication terminal according to claim 4, wherein the area information notification unit is at least one of a reception unit, a ringing unit, a light emitting unit, and a display unit of the VPN communication terminal.

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