JP2011244165A - Extension management device and extension number allocation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve flexibility and convenience in an extension call system.SOLUTION: A number acquisition unit 10 acquires an extension number to be allocated to a mobile station device when the mobile station device using an external number is in an area where the mobile station device can use the extension. An extension subscriber DB 20 stores the extension number and the external number of the mobile station device mapped to each other. The extension subscriber DB 20 stores an effective period set to the correspondence between the extension number and the external number of the mobile station device. An area withdrawal detection unit 40 detects a withdrawal of the mobile station device from the area where the mobile station device can use the extension. A term management unit 50, when the mobile station device withdraws from the area where the mobile station device can use the extension, deletes the correspondence in relation to the mobile station device from the extension subscriber DB 20 after the effective period is elapsed.

Description

  The present invention relates to an extension management device and an extension number assigning method.

  In recent years, a communication service using a mobile phone owned by a user as an extension telephone has been provided by a telecommunications carrier. In such a communication service, when a mobile phone designates a destination extension number and makes a call, a connection request is transferred to a management server device installed in the extension telephone network via a switch installed in the mobile phone network. The Then, the management server device converts the telephone number of the caller's mobile phone into a corresponding extension number, and transmits the connection request from the mobile phone to the extension call connection device as a connection request from the extension terminal of the converted extension number To do.

  The extension call connection device includes, for example, a SIP (Session Initiation Protocol) server and establishes an extension call according to a connection request from the management server device. That is, the extension call connection device calls a destination extension number. As a result, if the extension number of the called party is that of the actual extension terminal, the connection is established between the mobile phone of the caller and the extension terminal. On the other hand, if the destination extension number corresponds to the phone number of the mobile phone, the management server device converts the extension number to the corresponding phone number of the mobile phone. Then, the management server device transfers the call to the extension number as a call to the telephone number of the mobile phone and transfers the processing to the exchange installed in the mobile phone network.

  In this way, in a communication service that uses a mobile phone as an extension telephone, the management server device mutually converts the telephone number of the mobile phone and the extension number, so that the extension terminals are artificially connected within the extension telephone network. Communication will be performed. Therefore, the telephone number and extension number of the mobile phone are stored in advance in the management server device in association with each other. Thus, the user can always use the mobile phone as an extension telephone as long as the mobile phone can communicate.

  By the way, while there is a communication service in which a mobile phone can always be used as an extension telephone, it is also considered that the mobile phone can be used as an extension telephone only when the user is in a specific area. In this case, when it is detected that the mobile phone has entered a specific area, an extension number is assigned to the mobile phone, and the mobile phone can be used as an extension terminal while the user is in the area. . When it is detected that the mobile phone has left the specific area, the extension number assigned to the mobile phone is released. This makes it possible to construct a flexible extension call system while effectively using a limited extension number.

JP 2008-236044 A JP 2000-78626 A

  However, in the above-described prior art, an extension number is fixedly assigned to the mobile phone, or an extension number is assigned only when the mobile phone is located in a specific area. There is a problem that there is a certain limit. Specifically, for example, when an extension call system is introduced in an accommodation facility such as a hotel, it is conceivable to use a mobile phone owned by the guest as an extension terminal while the guest is in the facility. However, in the above-described conventional technology, it is necessary to register the telephone number and extension number of the guest's mobile phone in association with each time the guest changes, or when the guest goes out, It cannot be used as an extension terminal.

  As described above, in the conventional extension call system, although a mobile phone can be used, there is a problem that flexible operation is difficult. For this reason, an extension call system using a mobile phone is required to be able to operate flexibly and improve convenience.

  The disclosed technology has been made in view of the above points, and an object thereof is to provide an extension management device and an extension number assignment method capable of improving the flexibility and convenience of an extension call system.

  In one aspect, the extension management device disclosed in the present application is an acquisition unit that acquires an extension number to be assigned to a mobile station device that has entered an extension usable area, an extension number acquired by the acquisition unit, and the mobile station device. A storage unit for storing a correspondence relationship with an external line number assigned in advance, a detection unit for detecting that the mobile station device has left the extension usable area, and an extension usable area for the mobile station device by the detection unit A deletion unit that deletes the corresponding relationship from the storage unit after the expiration date set in the corresponding relationship between the extension number and the external number related to the mobile station device.

  According to one aspect of the extension management device and the extension number assignment method disclosed in the present application, there is an effect that the flexibility and convenience of the extension call system can be improved.

FIG. 1 is a block diagram showing the configuration of the extension management server device according to the first embodiment. FIG. 2 is a diagram showing the configuration of the extension call system according to the second embodiment. FIG. 3 is a block diagram showing a configuration of the extension management server device according to the second embodiment. FIG. 4 is a diagram showing a specific example of the extension subscriber DB according to the second embodiment. FIG. 5 is a flowchart showing the extension number assigning method according to the second embodiment. FIG. 6 is a sequence diagram showing extension number assignment processing according to the second embodiment. FIG. 7 is a diagram illustrating a hardware configuration example of a computer.

  Hereinafter, embodiments of an extension management device and an extension number assignment method disclosed in the present application will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a block diagram showing the configuration of the extension management server device according to the first embodiment. The extension management server apparatus shown in FIG. 1 includes a number acquisition unit 10, an extension subscriber database (hereinafter abbreviated as "extension subscriber DB") 20, a connection request transfer unit 30, an area exit detection unit 40, and a time limit management unit 50. Have.

  For example, when a mobile station device using an external line number such as a mobile phone or a personal handy-phone system (PHS) is located in an extension usable area, the number acquisition unit 10 is an extension number assigned to the mobile station device. To get. Then, the number acquisition unit 10 associates the external line number of the mobile station apparatus with the assigned extension number and registers it in the extension subscriber DB 20, and sets the expiration date of the assigned extension number.

  The extension subscriber DB 20 stores the extension number and the external number of the mobile station apparatus in association with each other. The extension subscriber DB 20 stores an expiration date set for the correspondence between the extension number and the external line number of the mobile station apparatus.

  The connection request transfer unit 30 refers to the extension subscriber DB 20 and converts the external line number of the mobile station apparatus into a corresponding extension number when there is a connection request from the mobile station apparatus that designates the extension number as the destination. Then, the connection request transfer unit 30 outputs the connection request from the mobile station device to the extension call connection device that connects the extension call as a connection request from the extension terminal corresponding to the converted extension number.

  The area leaving detection unit 40 detects that the mobile station device has left the area where extension is available. Then, when the mobile station device leaves the area where the extension can be used, the area exit detection unit 40 notifies the time limit management unit 50 to that effect.

  When the time limit management unit 50 is notified from the area leaving detection unit 40 that the mobile station device has left the extension usable area, the time limit management unit 50 stores the extension number and extension number stored in the extension subscriber DB 20 for the mobile station device. Start deadline management for correspondence. That is, when the mobile station device leaves the extension usable area, the time limit management unit 50 deletes the correspondence relationship regarding the mobile station device from the extension subscriber DB 20 after the expiration date has passed.

  Next, the operation of the extension management server device configured as described above will be described. The extension management server apparatus shown in FIG. 1 assigns an extension number to a mobile station apparatus when the mobile station apparatus enters an extension usable area.

  That is, the extension subscriber DB 20 is referred to by the number acquisition unit 10 and a new extension number that can be associated with an outside line number is newly acquired. Then, the number acquisition unit 10 registers the correspondence between the external line number of the mobile station apparatus that has entered the extension usable area and the acquired extension number in the extension subscriber DB 20. At this time, the extension subscriber DB 20 also stores the expiration date of the correspondence between the outside line number and the extension number.

  As a result, the extension number and the extension number of the mobile station apparatus in the extension usable area are associated with each other, and the extension number is assigned to the mobile station apparatus. While the correspondence between the external number and the extension number is stored in the extension subscriber DB 20, the mobile station device can make a connection request specifying the extension number as the destination and communicate as an extension terminal. It becomes. Specifically, the connection request from the mobile station apparatus is output by the connection request transfer unit 30 to the extension call connection apparatus that connects the extension call. At this time, the extension subscriber DB 20 is referred to by the connection request transfer unit 30, and the outside line number of the source mobile station apparatus is converted into the corresponding extension number. Therefore, the connection request is output to the extension call connection device as a connection request from the extension terminal corresponding to the converted extension number. For this reason, the extension call connection device that has received the connection request connects the extension call by the same processing as that for a normal extension call.

  Thus, when the mobile station apparatus is capable of an extension call and the area exit detection unit 40 detects that the mobile station apparatus has exited the extension usable area, the time limit is set for the correspondence between the external number and the extension number. Management begins. That is, the area leaving detection unit 40 detects that the mobile station device has left the extension usable area, and notifies the time limit management unit 50 to that effect. Then, the expiration date management unit 50 refers to the expiration date set for the correspondence between the external line number and the extension number of the mobile station apparatus, and waits until the expiration date elapses.

  At this time, the mobile station apparatus has left the extension usable area, but can communicate as an extension terminal until the expiration date has passed. When the expiration date expires, the expiration date management unit 50 deletes the correspondence between the external line number and the extension number of the mobile station apparatus from the extension subscriber DB 20. As a result, the extension number associated with the external number of the mobile station apparatus becomes a free extension number again. In addition, since the correspondence relationship between the external line number and the extension number is deleted, the mobile station device cannot communicate as an extension terminal.

  As described above, according to the present embodiment, when the mobile station device is located in the extension usable area, the correspondence relationship between the external line number of the mobile station device and the extension number assigned to the mobile station device is stored. The mobile station apparatus can communicate as an extension terminal. When it is detected that the mobile station device has left the extension usable area, the correspondence is deleted after the expiration date of the correspondence between the stored outside line number and the extension number has elapsed. For this reason, the mobile station device can communicate as an extension terminal even if it is not in the extension usable area, as long as it is within the expiration date of the correspondence relationship, and the flexibility and convenience of the extension call system Can be improved.

(Embodiment 2)
FIG. 2 is a diagram showing the configuration of the extension call system according to the second embodiment. The extension call system shown in FIG. 2 includes a mobile communication system having a control station apparatus 100, base station apparatuses 110 and 120, and a mobile station apparatus 130. The extension call system shown in FIG. 2 includes an extension management server device 200 connected to the control station device 100 and an extension call connection device 300 connected to the extension management server device 200.

  The control station apparatus 100 is connected to the base station apparatuses 110 and 120, and exchanges data with the mobile station apparatus 130 via the base station apparatuses 110 and 120. Specifically, when the mobile station device 130 enters the cell 110 a of the base station device 110, the control station device 100 receives the extension number acquisition request from the mobile station device 130 via the base station device 110. Then, the control station apparatus 100 transfers the extension number acquisition request to the extension management server apparatus 200.

  When the mobile station device 130 leaves the cell 110a of the base station device 110, the control station device 100 receives a notification to that effect from the base station device 110. Then, the control station apparatus 100 transfers the area exit notification to the extension management server apparatus 200.

  The base station apparatus 110 has jurisdiction over the cell 110a and performs wireless communication with the mobile station apparatus in the cell 110a. The cell 110a is, for example, a femtocell that covers a relatively narrow area such as one building, and is an area where the mobile station apparatus can use an extension. Then, for example, when the mobile station device 130 enters the cell 110a, the base station device 110 notifies the mobile station device 130 that the extension can be used. Also, the base station apparatus 110 monitors the mobile station apparatus 130 that has entered the cell 110a, and when the mobile station apparatus 130 leaves the cell 110a, notifies the control station apparatus 100 to that effect. That is, the base station apparatus 110 determines that the mobile station apparatus 130 has left the cell 110a, for example, when wireless communication with the mobile station apparatus 130 becomes impossible, and sends an area exit notification to the control station apparatus 100. Send to.

  Base station apparatus 120 communicates wirelessly with a mobile station apparatus in a cell (not shown). The cell managed by the base station apparatus 120 is a cell in a normal mobile communication system. The mobile station device 130 is, for example, a mobile phone or PHS owned by the user. When entering the cell 110a, the mobile station device 130 can communicate as an extension terminal via the base station device 110. Then, even after leaving the cell 110a, the mobile station device 130 can communicate as an extension terminal, for example, via the base station device 120 or the like until the expiration date elapses.

  The extension management server apparatus 200 receives an extension number acquisition request from the mobile station apparatus 130 and assigns an extension number that can be temporarily used to the mobile station apparatus 130. Then, the extension management server device 200 stores the correspondence relationship between the external line number of the mobile station device 130 and the assigned extension number together with the expiration date of this correspondence relationship. Thereafter, when the extension management server apparatus 200 receives an extension connection request from the mobile station apparatus 130 to which the extension number is assigned, the extension management server apparatus 200 converts the external line number of the mobile station apparatus 130 into a corresponding extension number, and Transfer to the call connection device 300. Similarly, upon receiving an extension connection request to the mobile station apparatus 130 to which the extension number is assigned, the extension management server apparatus 200 converts the extension number assigned to the mobile station apparatus 130 into a corresponding external number, The connection request is transferred to the control station apparatus 100.

  Then, when the area exit notification of the mobile station device 130 is received from the control station device 100, the extension management server device 200 manages the time limit of the correspondence between the external line number and the extension number related to the mobile station device 130, and the expiration date is When the time elapses, the correspondence is deleted. The configuration and operation of the extension management server device 200 will be described in detail later.

  The extension call connection device 300 includes, for example, a SIP server and establishes an extension call in response to a connection request received from the extension management server device 200. That is, the extension call connection device 300 establishes an extension call between the caller and the callee by executing processing for transferring a connection request from the caller to the callee.

  FIG. 3 is a block diagram showing a configuration of the extension management server apparatus 200 according to the second embodiment. The extension management server device 200 shown in FIG. 3 includes a number request accepting unit 210, a number obtaining unit 220, an extension subscriber DB 230, an outside line number processing unit 240, a number conversion unit 250, an extension number processing unit 260, an area exit detection unit 270, and A term management unit 280 is provided.

  The number request receiving unit 210 receives an extension number acquisition request transmitted when the mobile station device 130 enters the cell 110 a via the base station device 110 and the control station device 100. That is, when the mobile station device 130 enters the extension usable cell 110a, the mobile station device 130 transmits an extension number acquisition request for communication as an extension terminal, but the number request receiving unit 210 receives the extension number acquisition request.

  When the extension number acquisition request is received by the number request reception unit 210, the number acquisition unit 220 acquires the extension number assigned to the mobile station apparatus 130 from the extension subscriber DB 230. Specifically, the number acquisition unit 220 assigns an unassigned free extension number among the extension numbers stored in the extension subscriber DB 230 to the mobile station apparatus 130. Then, the number acquisition unit 220 associates the external line number of the mobile station device 130 with the assigned extension number and registers it in the extension subscriber DB 230, and sets the expiration date of the assigned extension number. At this time, the number acquisition unit 220 may set a uniform expiration date such as 24 hours for all mobile station devices, or may set a different expiration date for each mobile station device. Further, the number acquisition unit 220 notifies the mobile station device 130 of the extension number assigned to the mobile station device 130 via the control station device 100 and the base station device 110.

  The extension subscriber DB 230 stores the extension number and the external line number of the mobile station apparatus in association with each other. The extension subscriber DB 230 stores the expiration date set for the correspondence between the extension number and the external number of the mobile station apparatus. Specifically, the extension subscriber DB 230 stores, for example, information as shown in FIG. In other words, the extension subscriber DB 230 has a fixed assignment extension number fixedly assigned to an external line number of a specific mobile station apparatus and a temporary assignment temporarily assigned to an external line number of a mobile station apparatus entering the cell 110a. All extension numbers are stored. The extension subscriber DB 230 stores the external line number of the mobile station apparatus in association with each extension number. Further, the extension subscriber DB 230 stores an expiration date for each correspondence relationship between the extension number and the external number, and a timer priority flag indicating whether the expiration date is preferentially applied.

  Referring specifically to FIG. 4, for example, the extension number “0000” is associated with the external number “090-1111-2222” of the mobile station apparatus. Since this correspondence is fixed assignment in which an extension number is fixedly assigned to the mobile station apparatus, the expiration date is “indefinite”. Note that the extension number “4999” has not yet been assigned the outside line number of the mobile station apparatus, and the corresponding outside line number is “reserved”.

  For example, the extension number “5001” is associated with the external number “090-5555-6666” of the mobile station apparatus. Since this correspondence is temporary allocation in which an extension number is temporarily allocated to the mobile station apparatus, the expiration date is set to “14:20 on December 11, 2009”. In order to preferentially apply this expiration date, the timer priority flag is “ON”. On the other hand, the timer priority flag is set to “OFF” for the correspondence relationship with the extension number “5002” because the expiration date is not preferentially applied. In this case, the expiration date is not necessarily applied to the correspondence relationship regarding the extension number “5002”, for example, the mobile station device is immediately deleted when the mobile station device leaves the cell 110a. The timer priority flag may be determined to be “ON” or “OFF” for each mobile station device, and may be set by an administrator of the extension call system. The extension number “5003” is not associated with an external number of the mobile station apparatus, and stores an unassigned free extension number.

  Returning to FIG. 3, the outside line number processing unit 240 receives a connection request addressed to the extension number from the mobile station apparatus 130 that acquired the extension number from the control station apparatus 100, and outputs the received connection request to the number conversion unit 250. To do. This connection request includes the outside line number of the source mobile station apparatus 130 and the destination extension number. Further, when a connection request addressed to the mobile station apparatus 130 that has acquired the extension number is output from the number conversion section 250, the outside line number processing section 240 transmits the output connection request to the control station apparatus 100. This connection request includes the extension number of the transmission source and the external line number of the destination mobile station apparatus 130.

  When the connection request from the mobile station apparatus 130 is output from the external line number processing unit 240, the number conversion unit 250 refers to the extension subscriber DB 230 and corresponds to the extension number corresponding to the source external line number included in the connection request. Convert to Then, the number conversion unit 250 outputs a connection request in which both the transmission source and the called destination are converted into extension numbers, to the extension number processing unit 260. In addition, when the connection request addressed to the mobile station apparatus 130 is output from the extension number processing unit 260, the number conversion unit 250 refers to the extension subscriber DB 230 and corresponds to the extension number of the called party included in the connection request. It is converted into an external line number of the mobile station device 130. Then, the number conversion unit 250 outputs the connection request in which the destination is converted into the external line number of the mobile station device 130 to the external line number processing unit 240. As described above, if the correspondence between the extension number and the outside line number is stored in the extension subscriber DB 230, the number conversion unit 250 converts the number of the caller or the callee to each other, and the extension call connection device 300 or the control A connection request for requesting establishment of a call by the station apparatus 100 is output.

  When the connection request addressed to the mobile station device 130 that has acquired the extension number is output from the number conversion unit 250, the extension number processing unit 260 transmits the output connection request to the extension call connection device 300. This connection request includes the extension number assigned to the source mobile station apparatus 130 and the destination extension number. The extension number processing unit 260 receives a connection request addressed to the extension number assigned to the mobile station device 130 from the extension call connection device 300, and outputs the received connection request to the number conversion unit 250. This connection request includes the source extension number and the extension number assigned to the destination mobile station apparatus 130.

  The area exit detection unit 270 receives an area exit notification transmitted from the base station device 110 via the control station device 100 when the mobile station device 130 leaves the cell 110a. Then, the area leaving detection unit 270 detects that the mobile station device 130 has left the cell 110a, and notifies the time limit management unit 280 to that effect.

  When the time limit management unit 280 is notified from the area exit detection unit 270 that the mobile station device 130 has left the cell 110a, the correspondence between the external line number and the extension number stored in the extension subscriber DB 230 for the mobile station device 130 Start deadline management for. That is, when the mobile station device 130 leaves the cell 110a, the time limit management unit 280 deletes the correspondence relationship regarding the mobile station device 130 from the extension subscriber DB 230 after the expiration date has passed. That is, when the expiration date has passed, the time limit management unit 280 sets the extension number stored in the extension subscriber DB 230 in association with the external number of the mobile station device 130 as a free extension number.

  However, the time limit management unit 280 executes time limit management for the correspondence relationship in which the timer priority flag is “ON”, and for the correspondence relationship in which the timer priority flag is “OFF”, the mobile station device immediately exits from the cell 110a. You may delete the correspondence regarding this mobile station apparatus.

  Next, an extension number assigning method by the extension management server apparatus 200 configured as described above will be described with reference to the flowchart shown in FIG. Hereinafter, an extension number assignment method when the mobile station apparatus 130 that has entered the cell 110a transmits an extension number acquisition request will be described.

  The extension number acquisition request transmitted from the mobile station apparatus 130 is received by the number request reception unit 210 of the extension management server apparatus 200 via the base station apparatus 110 and the control station apparatus 100 (step S101). When the extension number acquisition request is received by the number request reception unit 210, the extension subscriber DB 230 is referred to by the number acquisition unit 220, and one free extension number is acquired from the temporarily assigned extension numbers and assigned to the mobile station apparatus 130. (Step S102). Then, the number acquisition unit 220 registers the correspondence relationship between the external line number of the mobile station apparatus 130 and the assigned extension number in the extension subscriber DB 230. The extension number assigned to the mobile station apparatus 130 is notified to the mobile station apparatus 130 via the control station apparatus 100 and the base station apparatus 110. Thereby, the mobile station apparatus 130 can acquire the extension number assigned to the own apparatus.

  Further, when the correspondence between the external line number and the extension number related to the mobile station device 130 is registered in the extension subscriber DB 230 by the number acquisition unit 220, the expiration date of this correspondence is also set at the same time (step S103). That is, for example, the date and time after 24 hours from the date and time when the correspondence between the outside line number and the extension number is registered in the extension subscriber DB 230 is stored in the extension subscriber DB 230. The expiration date may be uniformly the same for all mobile station apparatuses, or may be different for each mobile station apparatus. Further, the expiration date may be a relative date / time based on the date / time when the correspondence is registered or the date / time when the mobile station device leaves the extension usable area, or may be an absolute date / time unrelated to these dates / times. . Then, when the expiration date is set, the number acquisition unit 220 sets a timer priority flag indicating whether to apply the expiration date preferentially to “ON” or “OFF”.

  As described above, the correspondence between the external number and the extension number is registered in the extension subscriber DB 230 together with the expiration date, so that the mobile station is in the cell 110a or until the expiration date is exceeded. The device 130 can communicate as an extension terminal. That is, when the mobile station device 130 transmits a connection request designating an extension number as a destination, the connection request is transferred from the control station device 100 to the external line number processing unit 240 of the extension management server device 200. Then, the number conversion unit 250 converts the outside line number of the caller included in the connection request into the corresponding extension number, and the connection request in which both the caller and the callee are extension numbers is output to the extension number processing unit 260. Is done. This connection request is transferred from the extension number processing unit 260 to the extension call connection device 300, and the extension call connection device 300 executes extension call establishment processing. Also, when the mobile station device 130 is the destination, the number conversion unit 250 converts the number included in the connection request, and the control station device 100 executes call establishment processing.

  By the way, while the mobile station apparatus 130 is located in the cell 110a, it can communicate as an extension terminal as described above, while being monitored by the base station apparatus 110. During this time, the extension management server device 200 waits for the mobile station device 130 to leave the cell 110a (step S104). Then, when the mobile station device 130 leaves the cell 110a (Yes in step S104), the base station device 110 transmits an area leave notification regarding the mobile station device 130. The area leaving notification is received by the area leaving detection unit 270 of the extension management server device 200 via the control station device 100, and the time limit management unit 280 is notified that the mobile station device 130 has left the cell 110a.

  Then, the term managing unit 280 refers to the extension subscriber DB 230 and determines whether or not the external line number and the timer priority flag of the extension number relating to the mobile station device 130 are “ON” (step S105). As a result of this determination, if the timer priority flag is “OFF” (No in step S105), the extension number assigned to the mobile station apparatus 130 is released by the time limit management unit 280 (step S107). That is, when the mobile station apparatus 130 leaves the cell 110a, the correspondence between the external line number and the extension number related to the mobile station apparatus 130 is immediately deleted from the extension subscriber DB 230.

  On the other hand, when the timer priority flag is “ON” (Yes in step S105), the time limit management unit 280 starts time limit management of the correspondence between the external line number and the extension number related to the mobile station device 130. That is, even when the mobile station apparatus 130 leaves the cell 110a, the correspondence between the external line number and the extension number for the mobile station apparatus 130 is not deleted from the extension subscriber DB 230. Therefore, even if the mobile station apparatus 130 is located outside the cell 110a, the mobile station apparatus 130 transmits a connection request to the extension management server apparatus 200 via, for example, the base station apparatus 120 and the control station apparatus 100, and communicates as an extension terminal. Is possible. As described above, since the mobile station device 130 can make an extension call even after leaving the extension usable area, the flexibility and convenience of the extension call system can be improved.

  After the expiration date management is started, it is determined whether or not the expiration date has been exceeded by the expiration date management unit 280 (step S106). While the expiration date is not exceeded (No in step S106), the correspondence relationship with the mobile station apparatus 130 is an extension. It continues to be stored in the subscriber DB 230. When the expiration date is exceeded (Yes at Step S106), the extension number assigned to the mobile station device 130 is released by the expiration date management unit 280 (Step S107). That is, when the mobile station device 130 leaves the cell 110 a and the expiration date is exceeded, the correspondence between the external line number and the extension number related to the mobile station device 130 is deleted from the extension subscriber DB 230. For this reason, in the extension subscriber DB 230, temporarily assigned extension numbers are not continuously assigned to the mobile station apparatus 130, and limited extension numbers can be used effectively.

  Next, the procedure of extension number assignment processing according to the present embodiment will be described with reference to the sequence diagram shown in FIG. Here, a process of assigning an extension number to mobile station apparatus 130 when mobile station apparatus 130 enters cell 110a will be described.

  When the mobile station device 130 enters the cell 110a, the mobile station device 130 notifies the base station device 110 to that effect (step S201). Upon receiving the notification from the mobile station device 130, the base station device 110 starts monitoring whether the mobile station device 130 is in the cell 110a (step S202). In addition, the base station apparatus 110 notifies the mobile station apparatus 130 that an extension is available in the cell 110a (step S203).

  The mobile station apparatus 130 notified that the extension is available transmits an extension number acquisition request to the extension management server apparatus 200 via the base station apparatus 110 and the control station apparatus 100 (step S204). The extension number acquisition request is received by the number request reception unit 210 of the extension management server device 200, and the extension number is assigned to the mobile station device 130 by the number acquisition unit 220 (step S205). That is, the number acquisition unit 220 acquires one of the vacant extension numbers among the temporarily assigned extension numbers stored in the extension subscriber DB 230, and notifies the mobile station apparatus 130 of the acquired extension number (step S206). . At the same time, the number acquisition unit 220 registers the correspondence between the external line number and the extension number related to the mobile station apparatus 130 in the extension subscriber DB 230, and sets an expiration date.

  The mobile station device 130 acquires the extension number assigned to the mobile device by the notification from the number acquisition unit 220, and thereafter, the extension call using the extension number becomes possible. In addition, the mobile station device 130 can make an extension call, while the base station device 110 monitors whether the mobile station device 130 is located in the cell 110a. When the base station apparatus 110 detects that the mobile station apparatus 130 has left the cell 110a (step S207), the base station apparatus 110 transmits an area exit notification to the extension management server apparatus 200 via the control station apparatus 100 (step S208). .

  The transmitted area leaving notification is received by the area leaving detection unit 270 of the extension management server device 200, and the deadline management unit 280 is notified that the mobile station device 130 has left the cell 110a. Thereby, the time limit management unit 280 starts time limit management of the correspondence between the external line number and the extension number related to the mobile station apparatus 130 (step S209). When the expiration date of the correspondence between the external line number and the extension number regarding the mobile station device 130 is exceeded, the deadline management unit 280 deletes this correspondence from the extension subscriber DB 230 and releases the extension number (step S210). .

  As described above, the correspondence between the external line number and the extension number related to the mobile station apparatus 130 is stored in the extension subscriber DB 230 until the expiration date is exceeded after the mobile station apparatus 130 leaves the cell 110a. For this reason, the mobile station apparatus 130 located outside the cell 110a can communicate as an extension terminal until the expiration date is exceeded. Therefore, for example, when an extension call system is introduced in an accommodation facility such as a hotel, a mobile phone owned by the guest can be used as an extension terminal while the guest is in the facility corresponding to the cell 110a. is there. Furthermore, even if the guest goes out, the mobile phone can be used as an extension terminal within the expiration date.

  As described above, according to the present embodiment, when a mobile station device in a cell that can use an extension requests assignment of an extension number, the external number of the mobile station device and the extension number assigned to the mobile station device And the mobile station apparatus can communicate as an extension terminal. When it is detected that the mobile station device has left the cell, the correspondence relationship is deleted after the expiration date of the correspondence relationship between the stored external line number and the extension number has elapsed. For this reason, the mobile station apparatus can communicate as an extension terminal even after leaving the cell, as long as it is within the validity period of the correspondence relationship, and the flexibility and convenience of the extension call system can be improved.

  In the second embodiment, the base station device 110 detects that the mobile station device 130 has left the cell 110a. However, the position of the mobile station apparatus 130 is not necessarily monitored by the base station apparatus 110, and it may be monitored whether the mobile station apparatus 130 is located in an area where the extension can be used by a different method. That is, for example, a position monitoring system specialized for monitoring the position of the mobile station apparatus may be introduced, or the position of the mobile station apparatus may be monitored using GPS (Global Positioning System) or the like.

  It is also possible to create a program in which the extension number assignment processing according to each of the above embodiments is described in a language that can be executed by a computer. In this case, when the computer executes the program, the same effects as in the above embodiments can be obtained. Further, the above-mentioned program is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read by the computer and executed, thereby realizing the extension number assignment processing similar to that in each of the above embodiments. May be.

  FIG. 7 is a block diagram showing a hardware configuration of a computer 400 that realizes extension number assignment processing. As shown in FIG. 7, the computer 400 includes a CPU 410 that executes the program, an input device 420 that inputs data, a ROM 430 that stores various data, a RAM 440 that stores calculation parameters and the like, and an extension number assignment process. A reading device 450 that reads a program from a recording medium 500 that records a program for realizing the above, an output device 460 such as a display, and a network interface 470 that exchanges data with another computer via the network 600 Are connected by a bus 480.

  The CPU 410 reads the program recorded on the recording medium 500 via the reading device 450 and then executes the program to realize extension number assignment processing. Examples of the recording medium 500 include an optical disk, a flexible disk, a CD-ROM, and a hard disk. Further, this program may be installed in the computer 400 via the network 600. At this time, the network 600 may be a wireless network or a wired network.

  Regarding the above embodiments, the following supplementary notes are further disclosed.

(Additional remark 1) The acquisition part which acquires the extension number allocated to the mobile station apparatus which entered the extension usable area,
A storage unit for storing a correspondence relationship between the extension number acquired by the acquisition unit and the external line number given in advance to the mobile station device;
A detection unit for detecting that the mobile station device has left the extension available area;
When it is detected by the detection unit that the mobile station device has left the extension usable area, the correspondence from the storage unit after the expiration date set in the correspondence between the extension number and the external number related to the mobile station device has passed. A deletion part that deletes the relationship;
An extension management device comprising:

(Additional remark 2) The receiving part which receives the connection request containing the external line number previously given to the said mobile station apparatus,
A conversion unit that acquires the extension number corresponding to the external line number included in the connection request received by the receiving unit from the storage unit, and converts the external line number included in the connection request into the acquired extension number;
A transmission unit for transmitting a connection request after conversion by the conversion unit;
The extension management device according to appendix 1, further comprising:

(Appendix 3) The acquisition unit
Including a reception unit that receives a number request for acquiring an extension number from the mobile station device;
Supplementary note 1 wherein, when a number request is accepted by the accepting unit, an extension number whose correspondence with an outside line number is not stored in the storage unit is acquired as an extension number assigned to the mobile station device. Extension management equipment.

(Appendix 4) The detection unit
Supplementary note 1 wherein when the mobile station apparatus leaves the cell controlled by the base station apparatus that performs wireless communication with the mobile station apparatus, the mobile station apparatus detects that the mobile station apparatus has left the extension usable area. The extension management device described.

(Supplementary Note 5) The storage unit
The extension management apparatus according to appendix 1, wherein the expiration date for each of the correspondence between the extension number and the outside number is stored.

(Appendix 6) The storage unit
6. The extension management apparatus according to appendix 5, wherein a timer priority flag indicating whether to apply an expiration date for each of the correspondence relationships is stored.

(Supplementary note 7) An acquisition step of acquiring an extension number to be assigned to a mobile station device that has entered the extension usable area;
A registration step of registering in the storage unit the correspondence between the extension number acquired in the acquisition step and the external line number given in advance to the mobile station device;
A detection step of detecting that the mobile station device has left the extension available area;
When it is detected in the detection step that the mobile station device has left the extension usable area, the registration step is performed after the expiration date set in the correspondence between the extension number and the external number related to the mobile station device. A deletion step of deleting the registered correspondence from the storage unit;
An extension number assigning method characterized by comprising:

(Supplementary note 8) An extension number assignment program executed by a computer,
An acquisition step of acquiring an extension number to be assigned to the mobile station device that has entered the extension usable area;
A registration step of registering in the storage unit the correspondence between the extension number acquired in the acquisition step and the external line number given in advance to the mobile station device;
A detection step of detecting that the mobile station device has left the extension available area;
When it is detected in the detection step that the mobile station device has left the extension usable area, the registration step is performed after the expiration date set in the correspondence between the extension number and the external number related to the mobile station device. A deletion step of deleting the registered correspondence from the storage unit;
An extension number assignment program characterized in that

10, 220 Number acquisition unit 20, 230 Extension subscriber DB
DESCRIPTION OF SYMBOLS 30 Connection request transfer part 40,270 Area exit detection part 50,280 Term management part 210 Number request reception part 240 External number processing part 250 Number conversion part 260 Extension number processing part

Claims (7)

An acquisition unit for acquiring an extension number to be assigned to a mobile station apparatus that has entered the extension usable area;
A storage unit for storing a correspondence relationship between the extension number acquired by the acquisition unit and the external line number given in advance to the mobile station device;
A detection unit for detecting that the mobile station device has left the extension available area;
When it is detected by the detection unit that the mobile station device has left the extension usable area, the correspondence from the storage unit after the expiration date set in the correspondence between the extension number and the external number related to the mobile station device has passed. A deletion part that deletes the relationship;
An extension management device comprising: A receiving unit for receiving a connection request including an external line number given in advance to the mobile station device;
A conversion unit that acquires the extension number corresponding to the external line number included in the connection request received by the receiving unit from the storage unit, and converts the external line number included in the connection request into the acquired extension number;
A transmission unit for transmitting a connection request after conversion by the conversion unit;
The extension management apparatus according to claim 1, further comprising: The acquisition unit
Including a reception unit that receives a number request for acquiring an extension number from the mobile station device;
2. When a number request is accepted by the accepting unit, an extension number whose correspondence with an outside line number is not stored in the storage unit is acquired as an extension number assigned to the mobile station device. The extension management device described. The storage unit
2. The extension management apparatus according to claim 1, wherein an expiration date for each of the correspondence relationship between the extension number and the outside line number is stored. The storage unit
5. The extension management apparatus according to claim 4, wherein a timer priority flag indicating whether an expiration date for each of the correspondence relationships is applied is stored. An acquisition step of acquiring an extension number to be assigned to the mobile station device that has entered the extension usable area;
A registration step of registering in the storage unit the correspondence between the extension number acquired in the acquisition step and the external line number given in advance to the mobile station device;
A detection step of detecting that the mobile station device has left the extension available area;
When it is detected in the detection step that the mobile station device has left the extension usable area, the registration step is performed after the expiration date set in the correspondence between the extension number and the external number related to the mobile station device. A deletion step of deleting the registered correspondence from the storage unit;
An extension number assigning method characterized by comprising: An extension number assignment program executed by a computer, wherein the computer
An acquisition step of acquiring an extension number to be assigned to the mobile station device that has entered the extension usable area;
A registration step of registering in the storage unit the correspondence between the extension number acquired in the acquisition step and the external line number given in advance to the mobile station device;
A detection step of detecting that the mobile station device has left the extension available area;
When it is detected in the detection step that the mobile station device has left the extension usable area, the registration step is performed after the expiration date set in the correspondence between the extension number and the external number related to the mobile station device. A deletion step of deleting the registered correspondence from the storage unit;
An extension number assignment program characterized in that

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