JP2009182887A - Telephone system and server apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telephone system which ensures sufficient speech quality at the time of simultaneous speech communication in one IP line connected with an IP network. <P>SOLUTION: In order to limit the number of simultaneous calls using an IP line which connects a distribution apparatus D1 and IP network/public network 100, an SIP server SS linked to the IP network/public network 100 is equipped with, for each distribution apparatus D linked to its IP line, a management server SS for storing: the information of a communication terminal EP which is speaking through use of the IP line L contained in the distribution apparatus D; an upper limit of the number of simultaneous calls which use that IP line L; and the current number of simultaneous calls, and a call connection request is detoured to a mobile network 200 when radio terminal equipment EP 11 performs speech communication exceeding the upper limit of the number of simultaneous calls. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a telephone system that enables simultaneous communication by a plurality of communication terminals using an IP line.

  In recent years, an FMC (Fixed Mobile Convergence) service, which is a fusion of a fixed telephone and a wireless communication terminal, which can use a wireless communication terminal such as a mobile phone or a PHS as a handset of the fixed telephone has been provided. With this FMC, the functions of the two terminals of the wireless communication terminal and the handset can be used by one terminal, or when the wireless communication terminal is in an area where the fixed telephone network can be used, By using a terminal as a handset, it has become possible to make a call via a fixed telephone network that has a lower communication charge than a mobile network.

  Such services are often used mainly for corporate extension telephones, but with the spread of IP lines to general households, wireless communication terminals can be used as slave phones for fixed telephones in the home. It is becoming.

Further, in a telephone system for making a call using such an IP line, a plurality of telephone numbers can be provided for one IP line. In such a case, a technique is known in which the number of simultaneous calls for each telephone number provided on an IP line is limited in order to perform flexible incoming call control (Patent Document 1).
JP 2006-197296 A

  However, in the above prior art, when a large number of calls are made simultaneously using an ordinary household IP line, the IP line laid at home has a narrower bandwidth than the IP line laid at the company, so call quality Cause congestion and congestion that makes it difficult to connect to the phone.

  In addition, when simultaneous calls using an IP line are restricted to avoid this, there is a problem that a wireless communication terminal used as a handset cannot make / receive calls.

  The present invention has been made in order to solve the above-described problems, and can obtain a sufficient call quality in the case of simultaneous calls on a single IP line connected to an IP network, and can be used in a wireless communication terminal. An object of the present invention is to provide a telephone system that can secure more opportunities for incoming calls.

  The telephone system according to the present invention is connected to a mobile network that performs wireless communication with a wireless communication terminal, is shared by a plurality of communication terminals including the wireless communication terminal, and receives a call connection request from the telephone network. In a telephone system using an IP line to be transmitted to a communication terminal, simultaneous call upper limit number storage means for storing the simultaneous call upper limit number of the communication terminal related to the IP line, and a call connection request to the radio communication terminal An upper limit for determining whether or not to permit a call connection request from the telephone network by comparing the number of simultaneous calls related to the communication terminal using the IP line and the upper limit number of simultaneous calls when received from the network Number determining means and means for transferring the call connection request to the mobile network when the upper limit number determining means determines that the call connection request via the IP line is not permitted, and the upper limit number determining means. If it is determined to permit a call connection request over the IP access in means, it is characterized by having a means for transferring the call connection request to the wireless communication terminal through the IP line.

  The telephone system according to the present invention is connected to a plurality of communication terminals including a wireless communication terminal that is connected to a mobile network that performs wireless communication with a wireless communication terminal and that can communicate with a wireless access point. In a telephone system using an IP line for transmitting a call connection request to a telephone, a call connection request provided at the wireless access point and attached with identification information relating to a call from the wireless communication terminal to the telephone network is received. In this case, the means for invalidating the identification information and transferring the call connection request, the simultaneous call upper limit number storage means for storing the simultaneous call upper limit number of the communication terminal related to the IP line, and the identification information invalidated When the received call connection request is received, the number of simultaneous calls related to the communication terminal using the IP line after reception is compared with the maximum number of simultaneous calls, and the IP line An upper limit number determining unit that determines whether or not to permit a call connection request via the IP line, and when the upper limit number determining unit determines that the call connection request via the IP line is not permitted, the call connection It is characterized by invalidating the request.

  The telephone system according to the present invention is connected to a plurality of communication terminals including a wireless communication terminal that is connected to a mobile network that performs wireless communication with a wireless communication terminal and that can communicate with a wireless access point. In a telephone system using an IP line for transmitting a call connection request to a telephone, a call connection request is received that is provided at the wireless access point and includes identification information relating to transmission from the wireless communication terminal to the telephone network. In this case, the means for invalidating the identification information and transferring the call connection request, the simultaneous call upper limit number storage means for storing the simultaneous call upper limit number of the communication terminal related to the IP line, and the identification information are invalidated. When the received call connection request is received, the number of simultaneous calls related to the communication terminal using the IP line after reception is compared with the maximum number of simultaneous calls, and the IP line is An upper limit number determining means for determining whether or not to permit the call connection request, and a notifying means provided in the wireless communication terminal for notifying information relating to the connected network. If it is determined that the call connection request via the IP line is not permitted, the wireless communication terminal transmits a call connection request non-permission notification to the wireless communication terminal, and receives the call connection request non-permission notification. The identification information attached to the call connection request is deleted, and the call connection request is retransmitted to a mobile network.

  The server device according to the present invention is connected to a mobile network that performs wireless communication with a wireless communication terminal, is shared by a plurality of communication terminals including the wireless communication terminal, and is a call connection request from a telephone network. In a server device used in a telephone system using an IP line that transmits an IP line to the communication terminal, a simultaneous call upper limit number storage unit that stores an upper limit number of simultaneous calls of the communication terminal related to the IP line, and the wireless communication When a call connection request to a terminal is received from the telephone network, the number of simultaneous calls related to the communication terminal using the IP line after reception is compared with the maximum number of simultaneous calls, and a call from the telephone network is compared. When the upper limit number determining means for determining whether or not to permit the connection request and the upper limit number determining means determine that the call connection request via the IP line is not permitted, the call connection request is And a means for transferring the call connection request to the wireless communication terminal via the IP line when the upper limit number determining means determines to permit the call connection request via the IP line. It is characterized by having.

  The server device according to the present invention is connected to a mobile network that performs wireless communication with a wireless communication terminal, is shared by a plurality of communication terminals including a wireless communication terminal that can communicate with a wireless access point, and a telephone network. In a server device used in a telephone system that uses an IP line for transmitting a call connection request to the IP line, a simultaneous call upper limit number storage means for storing the simultaneous call upper limit number of the communication terminal related to the IP line, and the wireless communication When a call connection request from a terminal is received, the number of simultaneous calls related to the communication terminal using the IP line after reception is compared with the maximum number of simultaneous calls, and a call connection request via the IP line is determined. An upper limit number determining means for determining whether to permit or not, and when the upper limit number determining means determines that the call connection request via the IP line is not permitted, It is characterized in that the.

  According to the present invention, it is possible to obtain a sufficient call quality in the case of simultaneous calls on one IP line connected to the IP network, and it is possible to further secure an opportunity to make and receive calls at the wireless communication terminal.

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of a telephone system according to the present invention.
This telephone system includes an IP network / public network 100 and a mobile network 200, which are telephone networks, a SIP server SS (management server), distribution devices D1, D2, and D3, a plurality of communication terminals EP11 (wireless communication terminals), EP12, and EP13. , EP20, EP30,..., EPn, an IP network / public network 100 and an IP line L1 connecting the distribution device D1.

  The IP network / public network 100 includes distribution devices D1, D2, and D3 that relay networks, a SIP (Session Initiation Protocol) server SS (management server) that controls VoIP (Voice over IP), and a mobile network 200. Is connected. Radio base station apparatuses BS1 and BS2 are further connected to the mobile network 200.

  Communication terminals EP11, EP12, EP13,..., EPn are connected to the distribution device D1, communication terminals EP20 and EP30 are connected to the distribution devices D2 and D3, respectively, and the communication terminal EP and the distribution device D are wired or wirelessly connected. Can be connected with. Here, the distribution device D1 is shown integrated with a wireless access point. The distribution device D may not be integrated with the wireless access point, and the wireless access point may be connected to the local network of the distribution device D1. For example, a wireless access point may be connected to the distribution device D1.

  The communication terminal EP11 (wireless communication terminal) may be connected to the IP network / public network 100 via the wireless access point and the distribution device D1, or may be connected to the mobile network 200 via the wireless base station device BS1. It can be done. Here, the distribution device D1 is assumed to be a router provided at home, and the communication terminal EP11 that can wirelessly connect to the distribution device D1 provided with a wireless access point communicates and distributes using the mobile network 200. A state is shown in which both communication using the device D1 is possible.

  Further, the SIP server SS receives a call connection request sent from the IP network / public network 100, and forwards the call connection request based on a predetermined determination.

FIG. 2 is a diagram illustrating a configuration of a distribution device D1 having a built-in wireless access point.
The distribution device D1 includes a communication interface unit 20 connected to the IP network / public network 100 on the WAN side and each communication terminal device EP on the LAN side, and a storage unit that buffers received data and stores an IP address. 22 and a control unit 21 for controlling them. The distribution device D1 performs routing from the LAN side to the WAN side or from the WAN side to the LAN side.

  Furthermore, the communication interface unit 20 includes a wireless unit 20a (wireless access point) that performs wireless communication. This radio | wireless part 20a can communicate by the same frequency and communication system as the frequency and communication system which are used by radio base station apparatus BS1.

  When receiving a call connection request with identification information sent from the communication terminal EP11 (wireless communication terminal), the control unit 21 invalidates the identification information and transfers the call connection request. ing. As a method of invalidating the identification information, the identification information is deleted or a command for ignoring the identification information is further added to the call connection request. In this embodiment, a method of invalidating by deleting identification information will be described as an example.

FIG. 3 is a diagram showing the configuration of the SIP server SS.
The SIP server SS includes a communication interface unit 30, a call control unit 31 (upper limit number judging means), a storage unit 32, and a management unit 33. The call control unit 31 and the management unit 33 are connected to each other, and are also connected to the communication interface unit 30 and the storage unit 32, respectively.

  The communication interface unit 30 is an interface for connecting to the IP network / public network 100, and receives a call connection request from the network or transmits a call connection non-permission notification to the network.

  The management unit 33 stores or updates information received from the communication interface unit 30 in the storage unit 32.

  The call control unit 31 determines whether or not the call connection request received by the communication interface unit 30 may be permitted based on the information in the storage unit 32 managed by the management unit 33 (upper limit number determination means, incoming call permission). Determining means), transferring the call connection request, or transmitting a call connection non-permission notice (invalidating the call connection request).

  The storage unit 32 stores the number of simultaneous calls, the upper limit of the number of simultaneous calls necessary to keep the call quality constant, and the simultaneous call upper limit number management table 32a (simultaneous call upper limit number storage means) that stores the current number of simultaneous calls. And an incoming call permission number management table 32b (incoming call permission number storage means) for storing numbers for which incoming calls are permitted via the IP network / public network 100 (fixed telephone network) for each wireless communication terminal. These tables 32 a and 32 b are managed by the management unit 33 and are referred to as materials for determining call control of the call control unit 31.

FIG. 4 is a diagram showing the configuration of the communication terminal EP11.
The communication terminal EP11 includes a communication interface unit 40, a control unit 41, a storage unit 42, and a user interface unit 43. The control unit 41 is connected to the communication interface unit 40, the storage unit 42, and the user interface unit 43.

  The communication interface unit 40 communicates with the radio base station apparatus BS and the radio access point by radio. The storage unit 42 stores various information such as a telephone directory and outgoing / incoming call history. The user interface unit 43 includes a display, an input button, a speaker, and the like, and can notify not only a call or operation of the communication terminal EP11 but also information related to the connected network (notification means). .

FIG. 5 shows an example of the simultaneous call upper limit number management table 32a.
The simultaneous call upper limit management table 32a includes the subscriber's IP telephone number, the IP address of the subscriber's router, the upper limit of the simultaneous calls using the IP line L1 connecting the router and the network, and The current number of simultaneous calls is stored. For convenience, an FMC ID, which is FMC identification information given to each subscriber, may be further stored.

  For example, the IP telephone number of the subscriber whose FMC ID is xxxxxxxx is 03-xxxx-yyyy, and the IP address is 192.168 .. xxx. yyy, the upper limit of the number of simultaneous calls is “4”, and the current number of simultaneous calls is “1”.

FIG. 6 shows an example of the incoming call permission number management table 32b.
The incoming call permission number management table 32b includes, for each FMC ID, a mobile phone number and its IP address that can be used as a handset of the phone corresponding to the FMC ID, the service status and call status of this mobile phone number, and The incoming call permission number, which is the telephone number of the caller who wants to call from the fixed telephone network when there is an incoming call, is stored.

  For example, a mobile phone number 090-xxxx-abcd is stored as a slave unit having an FMC ID of xxxxxxxx1, and its IP address is 192.168 .. xxx. 010. The service state of this mobile phone number indicates that the service (hereinafter referred to as FMC service) called from the fixed telephone network when a call connection request is made to this mobile phone number is “being started”. Yes. If the FMC service is “stopped”, the mobile phone number is called from the mobile network for all call connection requests. In addition, the call state is “busy”. Furthermore, it is shown that there are three incoming permission numbers of this mobile phone number: 090-xxxx-bbcd, 090-xxxx-efgh, 03-xxxx-ijkl.

  Among these elements stored in the incoming call permission number management table 32b, the mobile phone number, the service state for each mobile phone number, and the incoming call permission number for each mobile phone number are the computers that can access the SIP server SS, Settings can be made from a mobile phone.

Next, the operation of the telephone system when receiving an incoming call to the communication terminal EP11 will be described with reference to FIG.
Here, as an example, a case where there is an incoming call from the communication terminal EP30 to the communication terminal EP11 when the FMC service is stopped and a case where there is an incoming call from the communication terminal EP20 to the communication terminal EP11 when the FMC service is started are described. To do.

  It is assumed that the communication terminal EP11 is located in the wireless zone of the wireless base station device BS1 at a place where the communication terminal EP11 cannot communicate with the distribution device D1. At this time, a call connection request is transmitted from the communication terminal EP30 to the communication terminal EP11, and the communication terminal EP11 receives the call connection request via the radio base station apparatus BS1 (S101). The communication terminal EP11 that has received the call connection request transmits a call connection request response to the radio base station apparatus BS1 (S102), and is in a call connection (S103).

  When disconnecting a call from the communication terminal EP11, the communication terminal EP11 transmits a call disconnection request to the communication terminal EP30 via the radio base station apparatus BS1 (S104), and the communication terminal EP30 receiving this call disconnection request The call is disconnected by transmitting a call disconnection request response to the communication terminal EP11 via the station device BS1 (S105).

  Thereafter, when the communication terminal EP11 is in the wireless zone of the distribution device D1 (S106), the user of the communication terminal EP11 registers in the management server SS using the communication terminal EP13 that the FMC service of the communication terminal EP11 is started. (S107). By performing this registration, the FMC service of the communication terminal EP11 is being started.

  When the FMC service is being started, a call connection request from the communication terminal EP20 to the communication terminal EP12 is transmitted to the network (S108). When the management server SS receives this call connection request, the number of simultaneous calls related to the communication terminal that makes a call using the IP line after reception is compared with the maximum number of simultaneous calls, and whether or not to permit the call connection request, If the caller ID is stored in the incoming call permission number management table 32b (S109), it is determined that the call connection request is permitted and the caller number is stored in the incoming call permission number management table 32b. Then, the call connection request is transferred to the communication terminal EP11 via the IP network / public network 100 (S110). The communication terminal EP11 that has received this call connection request transmits a call connection request response to the management server SS (S111). When the management server SS receives the call connection request response, the distribution device D1 column of the simultaneous call upper limit number management table 32a and the incoming call permission number management table 32b is updated (S112), and the communication terminal EP11 and the communication terminal EP20 are call-connected. (S113).

  When disconnecting a call from the communication terminal EP11, the communication terminal EP11 transmits a call disconnection request to the communication terminal EP20 via the distribution device D1 (S114), and the communication terminal EP20 that has received this call disconnection request sends it to the management server SS. The call is disconnected by transmitting a call disconnection request response (S115), and the column of the distribution device D1 in the simultaneous call upper limit number management table and the incoming call permission number management table 32b is updated (S116).

Next, the operation of the telephone system when the communication terminal EP11 makes a call will be described with reference to FIG.
Here, as an example, when the communication terminal EP11 is located in the wireless zone of the distribution device D1, a case where the communication device EP11 transmits to the communication terminal EP30 using the distribution device D1 instead of the mobile network 200. explain.

  The communication terminal EP11 is located in the wireless zone of the distribution device D1, but is also located in the wireless zone of the wireless base station device BS1 connected to the mobile network 200 at the same time. By dialing only the destination telephone number as in the normal calling procedure, it is possible to make a call to both the distribution device D1 and the radio base station device BS1, so that identification information is set in the distribution device D1. To do. Identification information for making a call via the distribution device D1 is added to the head of the telephone number of the transmission destination, and the identification information is transmitted via the distribution device D1 that has received the identification information. At this time, the radio base station apparatus BS1 connected to the mobile network 200 in which the identification information is not set can transmit the identification information via the distribution apparatus D1 in order to determine the identification information as invalid information.

  First, after dialing identification information from the communication terminal EP11, a destination telephone number is dialed (S201). Here, # is given as an example of identification information. After dialing # which is this identification information, the destination telephone number is dialed. When the communication terminal EP dials, a call connection request to the communication terminal EP30 is sent to the management server SS (S202). The management server SS that has received this call connection request compares the number of calls related to the communication terminal that makes a call using the IP line after reception with the maximum number of simultaneous calls, and determines whether to permit the call connection request. If the call connection request is permitted (S203), the call connection request is transferred to the communication terminal EP30 (S204). The communication terminal EP30 that has received this call connection request transmits a call connection request response to the management server SS (S205), and the management server SS that has received the call connection request response receives the simultaneous call upper limit number management table 32a and the incoming call permission number. The field of the distribution device D1 in the management table 32b is updated (S206), and the call is connected (S207). When the call connection is established, the communication terminal EP11 notifies information related to the connected network by display on the display, sound, light, vibration, or the like.

  When disconnecting a call from the communication terminal EP11, the communication terminal EP11 transmits a call disconnection request to the communication terminal EP30 via the distribution device D1 (S208), and the communication terminal EP30 receiving the call disconnection request sends it to the management server SS. The call is disconnected by sending a call disconnection request response (S209), and the distribution device D1 column of the simultaneous call upper limit number management table 32a and the incoming call permission number management table 32b is updated (S210).

Next, processing of the management server will be described with reference to FIG.
First, it is determined whether a call connection request has been received (S301). If not received, step S301 is repeated. When the call connection request is received, it is determined whether or not the call connection request is a call connection request to a communication terminal connected to the IP line managed by the SIP server SS (S302).

  If it is a call connection request to a communication terminal connected to the IP line managed by the SIP server SS, the incoming call permission number management table 32b indicates whether or not the communication terminal EP of the transmission destination is starting the FMC service. Judgment is made with reference to (S303). If the FMC service is stopped, the call connection request is transferred to the mobile network 200 (S303). If the FMC service is being started, the number of calls related to the communication terminal that makes a call using the IP line after reception is compared with the maximum number of simultaneous calls, and it is determined whether or not to permit the call connection request (S304 ).

  If the number of simultaneous calls has reached the upper limit, it is determined that the call connection request is not permitted, and the call connection request is transferred to the mobile network 200 (S305). If the number of simultaneous calls is less than the upper limit, it is determined whether the destination number is stored in the incoming call permission number management table 32b (S306). If not stored, the call connection request is permitted and the call connection request is transferred to the mobile network 200 (S305).

  If it is stored in the incoming call permission number management table 32b, it is determined whether or not the destination number is busy (S307). If the call is busy, the call connection request is transferred to the subscriber telephone number of the fixed telephone corresponding to the destination number (S308). If not busy, the call connection request is transferred to the communication terminal of the call destination (S309). After transferring the call connection request, it is determined whether or not the call is connected (S310). If it is not detected that the call is connected, the process S310 is repeated.

  When the call connection is made, the simultaneous call upper limit number management table 32a and the incoming call permission number management table 32b are updated (S311). Thereafter, it is determined whether or not the call connection is disconnected (S312). If the disconnection of the call connection is not detected, the process S312 is repeated. When the call connection is disconnected, the simultaneous call upper limit number management table 32a and the incoming call permission number management table 32b are updated (S313).

  In step S302, if the received call connection request is not a call connection request to a communication terminal connected to an IP line managed by the SIP server SS, the received call connection request is managed by the SIP server SS. It is determined whether or not a call connection request is received from a communication terminal connected to the current IP line (S314). If it is not a call connection request from a communication terminal connected to an IP line managed by the SIP server SS, the call connection request is transferred to the mobile network 200 (S305).

  If the call connection request is from a communication terminal connected to the IP line managed by the SIP server SS, the number of calls and the number of simultaneous calls related to the communication terminal that makes a call using the IP line after receiving the call connection request It is compared with the upper limit number to determine whether or not to permit the call connection request (S315). If the number of simultaneous calls is less than the upper limit, the call connection request is transferred to the destination number (S309). If the number of simultaneous calls has reached the upper limit, the call connection request is invalidated (S316). In this embodiment, as a method of invalidating the call connection request, a notification that the call connection request is not permitted is transmitted to the caller. Note that as a method of invalidating the call connection request, the SIP server SS may cancel the call connection request such as discarding the call connection request.

  As described above, by providing the management server SS with the incoming call permission number management table 32b, the network to be used can be properly used by the other party who wants to make a call using the fixed telephone network and the other party who wants to make a call using the mobile network. . In addition, the management server SS includes the simultaneous call upper limit number management table 32b and the management unit 33, so that congestion on the IP line L1 can be prevented even when simultaneous calls are made, and at the same time, a certain voice quality is obtained. Since the call connection request is diverted to the mobile network when the maximum number of simultaneous calls used is exceeded, it is possible to handle calls when the IP line L1 cannot be used.

  In addition, if you are in a wireless zone where you can make calls using a wireless access point, for example, if you are at your home where a wireless access point is installed, when you use a wireless communication terminal at home, If the radio wave condition is not good even if you are in the radio zone of the station device BS1, use a home wireless access point that has a stable radio wave condition if the number of simultaneous calls using the IP line is within the upper limit. Therefore, the convenience for the user is further increased.

  In the first embodiment, for example, when the communication terminal EP11 is located in the wireless zone of the distribution device D1, the communication terminal EP11 makes an incoming / outgoing call via the distribution device D1. However, when the communication terminal EP11 makes a call via the distribution device D1, the call is made with identification information added to the head of the telephone number, and if the number of simultaneous calls on the IP line L1 to be used is less than the upper limit, a call connection request is made. If the number of simultaneous calls reaches the upper limit, call connection cannot be made via the distribution device D1, so the identification information is deleted and a call connection request is sent again via the radio base station device BS1. Will do.

  Therefore, in the second embodiment, when a call connection cannot be made via the distribution device D1, the communication terminal automatically sends a call connection request via the radio base station device BS1 (retransmission). Will be described.

FIG. 10 is a functional block diagram of the communication terminal EP11 according to the second embodiment.
The mobile terminal EP11 includes a communication interface unit 400, a transmission destination setting unit 401, a storage unit 402, a transmission destination determination unit 403, and a user interface unit 404.

  The transmission destination setting unit 401 is connected to the communication interface unit 400, the storage unit 402, the transmission destination determination unit 403, and the user interface unit 404, and the communication interface unit 400 and the transmission destination determination unit 403 are further connected.

  The communication interface unit 400 is an interface for wirelessly communicating with the radio communication base station device BS1 and the distribution device D1, and the user interface unit 404 is a button for performing an outgoing / incoming operation. The transmission destination setting unit 401 adds identification information to the head of the transmission destination telephone number or deletes the identification information attached thereto. When an outgoing operation is performed at the user interface unit 404, the destination setting unit 401 adds identification information such as # to the destination telephone number so that a call connection request is transmitted from the communication interface unit 400. It has become.

  In addition, when receiving a call connection disapproval notification for the call connection request transmitted from the communication interface unit 400, the call destination determination unit 403 has identification information at the head of the call destination telephone number for which the call connection is disapproved. It is judged whether it is attached. The storage unit 402 temporarily stores the destination telephone number determined by the destination determination unit 403.

  Since the configuration other than the communication terminal EP11 is the same as that shown in FIGS.

Next, with reference to FIG. 11, the operation | movement at the time of transmitting from communication terminal EP11 is demonstrated.
Here, the communication terminal EP11 transmits via the distribution device D1 and receives the notification of call connection disapproval from the management server SS because the upper limit of the number of simultaneous calls of the IP line L1 to be used has been reached. The operation of retransmitting the received communication terminal EP11 so as to automatically make a call connection via the mobile network is shown.

  First, a communication operation is performed from the communication terminal EP11 with the identification information added to the head of the destination telephone number (S401). When the outgoing operation is performed, a call connection request is transmitted to the management server SS via the distribution device D1 (S402).

  When the management server SS receives the call connection request, it compares the number of simultaneous calls related to the communication terminal that makes a call using the IP line after reception with the maximum number of simultaneous calls, and determines whether to permit the call connection request. (S403). Here, since the number of simultaneous calls on the IP line L1 has reached the upper limit, it is determined that the call connection cannot be permitted, and the management server SS sends a call connection non-permission notification to the communication terminal EP11 via the distribution device D1. (S404).

  When the communication terminal EP11 receives the call connection non-permission notification, the communication terminal EP determines whether or not the identification information is attached to the head of the destination telephone number. In this case, the identification information is attached. The identification information is deleted and retransmitted (S405). When the call is retransmitted, a call connection request is transmitted to the communication terminal EP30 that is the call destination via the radio base station apparatus BS1 (S406). When the communication terminal EP30 receives the call connection request, the communication terminal EP30 transmits a call connection request response to the communication terminal EP11 via the radio base station apparatus BS1 (S407). When the communication terminal EP11 receives this call connection request response, the communication terminal EP11 and the communication terminal EP30 are call-connected (S408). When the call connection is established, the communication terminal EP11 notifies information related to the connected network by display on the display, sound, light, vibration, or the like.

Next, the operation of the communication terminal EP11 will be described with reference to FIG.
First, when a call operation is performed on the user interface unit 44 (S501), the call is sent with identification information added to the head of the callee number (S502).

  After the call is made, it is determined whether or not the call connection is made by a notification sent from the management server SS (S503). If the received notification is not a call connection request non-permission notification, the communication terminal EP11 notifies information related to the connected network by display on the display, sound, light, vibration, or the like (S504). If the received notification is a notification that the call connection request is not permitted, the identification information attached to the head of the destination number is deleted and the call is retransmitted (S505).

  As described above, since the communication terminal EP11 includes the transmission destination setting unit 41 and the transmission destination determination unit 43 that perform a re-transmission operation, the radio base station apparatus exceeds the upper limit of the number of simultaneous calls on the IP line L1. When it is necessary to make a call via BS1, the user does not have to perform a call again operation.

  In addition, this invention is not limited to the above structure, A various deformation | transformation is possible. For example, the notification means is described so as to notify during call connection. However, information related to the connected network may be notified during a call connection request by ringing sound, voice, light, display display, vibration, or the like. .

The figure which showed the telephone system which concerns on one embodiment of this invention. The figure which showed the structure of the router which concerns on one embodiment of this invention. The figure which showed the structure of the SIP server which concerns on one embodiment of this invention. The figure which showed the structure of the communication terminal which concerns on one embodiment of this invention. The figure which showed the simultaneous call upper limit number management table which manages the number of simultaneous calls for every IP line which concerns on one embodiment of this invention. The figure which showed the incoming call permission number management table which manages the incoming call permission number for every radio | wireless communication terminal registered as a subunit | mobile_unit of the fixed telephone using the IP line which concerns on one embodiment of this invention. The sequence diagram at the time of the communication terminal which concerns on one embodiment of this invention receives. The sequence diagram at the time of the communication terminal which concerns on one embodiment of this invention transmits. The operation | movement flowchart of a SIP server when the communication terminals which concern on one embodiment of this invention make a telephone call using an IP line. The figure which showed the structure of the communication terminal which concerns on Example 2 of this invention. The sequence diagram at the time of the communication terminal which concerns on Example 2 of this invention transmits. The operation | movement flowchart at the time of the communication terminal which concerns on Example 2 of this invention transmits.

Explanation of symbols

EP11, EP12, EP13, EP20, EP30,..., EPn ... communication terminal device, D1, D2, D3 ... distribution device, SS ... SIP server, 100 ... IP network / public network, 20, 30, 40, 400 ... communication interface , 21, 41 ... control part, 31 ... call control part, 22, 32, 42 ... storage part, 32 a ... simultaneous call upper limit number management table, 32 b ... incoming call permission number management table, 33 ... management part, 43, 404 ... User interface unit 401... Destination setting unit 403.

Claims (8)

An IP line that is connected to a mobile network that performs wireless communication with a wireless communication terminal, is shared by a plurality of communication terminals including the wireless communication terminal, and transmits a call connection request from the telephone network to the communication terminal In the telephone system using
Simultaneous call upper limit number storage means for storing the simultaneous call upper limit number of the communication terminal related to the IP line;
When a call connection request to the wireless communication terminal is received from the telephone network, the number of simultaneous calls related to the communication terminal using the IP line is compared with the maximum number of simultaneous calls, and calls from the telephone network are compared. An upper limit number judging means for judging whether or not to permit the connection request;
Means for transferring the call connection request to the mobile network when the upper limit number determining means determines that the call connection request via the IP line is not permitted;
And a means for transferring the call connection request to the wireless communication terminal via the IP line when the upper limit number determining means determines to permit the call connection request via the IP line. Phone system. An incoming call permission number storage means for storing a caller source number that is allowed to be received in association with each wireless communication terminal;
An incoming call permission determining means for determining whether a caller source number is stored in the incoming call permission number storage means when the upper limit number determining means determines that a call connection request using the IP line is permitted; In addition,
When the incoming call permission judging means judges that the caller number is stored, the call connection request is transferred to the wireless communication terminal as the callee associated with the caller number via the IP line. The telephone system according to claim 1. An IP that is connected to a mobile network that performs wireless communication with a wireless communication terminal, is shared by a plurality of communication terminals including a wireless communication terminal that can communicate with a wireless access point, and transmits a call connection request to the telephone network In a telephone system using a line,
When receiving a call connection request provided in the wireless access point and having identification information related to transmission from the wireless communication terminal to the telephone network, the identification information is invalidated and the call connection request is transferred. Means,
Simultaneous call upper limit number storage means for storing the simultaneous call upper limit number of the communication terminal related to the IP line;
When the call connection request with the identification information invalidated is received, the number of simultaneous calls related to the communication terminal using the IP line after reception is compared with the maximum number of simultaneous calls, and the call is made via the IP line. An upper limit number judging means for judging whether or not to permit the requested call connection request,
The telephone system according to claim 1, wherein when the upper limit number judging means judges that the call connection request via the IP line is not permitted, the call connection request is invalidated. The wireless communication terminal further comprises notification means for notifying the wireless communication terminal that a call connection cannot be made when the call connection request is not permitted by the upper limit number determination means. The telephone system described. An IP that is connected to a mobile network that performs wireless communication with a wireless communication terminal, is shared by a plurality of communication terminals including a wireless communication terminal that can communicate with a wireless access point, and transmits a call connection request to the telephone network In a telephone system using a line,
Means for invalidating the identification information and transferring the call connection request when receiving a call connection request provided with identification information relating to transmission to the telephone network from the wireless communication terminal, provided in the wireless access point When,
Simultaneous call upper limit number storage means for storing the simultaneous call upper limit number of the communication terminal related to the IP line;
When the call connection request with the identification information invalidated is received, the number of simultaneous calls related to the communication terminal using the IP line after reception is compared with the maximum number of simultaneous calls, and the call is made via the IP line. An upper limit number judging means for judging whether or not to permit the requested call connection request;
Provided in the wireless communication terminal, and has a notification means for notifying information about the network being connected,
If it is determined that the call connection request via the IP line is not permitted by the upper limit number determining means, a notification of call connection request disapproval is transmitted to the wireless communication terminal,
The wireless communication terminal that has received the call connection request non-permission notification deletes the identification information attached to the call connection request and retransmits the call connection request to a mobile network. Phone system. An IP line that is connected to a mobile network that performs wireless communication with a wireless communication terminal, is shared by a plurality of communication terminals including the wireless communication terminal, and transmits a call connection request from the telephone network to the communication terminal In the server device used in the telephone system using
Simultaneous call upper limit number storage means for storing the simultaneous call upper limit number of the communication terminal related to the IP line;
When a call connection request to the wireless communication terminal is received from the telephone network, the number of simultaneous calls related to the communication terminal using the IP line is compared with the maximum number of simultaneous calls, and calls from the telephone network are compared. An upper limit number judging means for judging whether or not to permit the connection request;
Means for transferring the call connection request to the mobile network when the upper limit number determining means determines that the call connection request via the IP line is not permitted;
And a means for transferring the call connection request to the wireless communication terminal via the IP line when the upper limit number determining means determines to permit the call connection request via the IP line. Server device. An incoming call permission number storage means for storing a caller source number that is allowed to be received in association with each wireless communication terminal;
An incoming call permission determining means for determining whether a caller source number is stored in the incoming call permission number storage means when the upper limit number determining means determines that a call connection request via the IP line is permitted; In addition,
When it is determined by the incoming call permission determining means that the caller number is stored, a call connection request is transferred to the wireless communication terminal of the callee associated with the caller number via the IP line The server device according to claim 6, wherein: An IP that is connected to a mobile network that performs wireless communication with a wireless communication terminal, is shared by a plurality of communication terminals including a wireless communication terminal that can communicate with a wireless access point, and transmits a call connection request to the telephone network In a server device used in a telephone system using a line,
Simultaneous call upper limit number storage means for storing the simultaneous call upper limit number of the communication terminal related to the IP line;
When a call connection request from the wireless communication terminal is received, the number of simultaneous calls related to the communication terminal using the IP line after reception is compared with the maximum number of simultaneous calls, and the call via the IP line An upper limit number judging means for judging whether or not to permit the connection request,
The server device, wherein when the upper limit number judging means judges that the call connection request via the IP line is not permitted, the call connection request is invalidated.

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