JP2010004160A - Communication terminal, communication system, communication switching control method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To readily switch a communication with a mating communication terminal to a communication using another communication path. <P>SOLUTION: When a communication 61 is performed between a communication terminal 10 and the mating communication terminal 50 connected to a communication network 2 via a communication path 2A, a call control section 13 is automatically controlled by a communication switch control section 14 responding to a communication transfer operation of a user to instruct communication networks 2, 3 to perform a series of call controlling operations to effect switch control that the ever performed communication 61 is switched to a communication 63 between the self communication terminal 10 and the mating communication terminal 50 via a communication path 3A. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a communication technique, and more particularly to a handover technique for switching communication with an arbitrary communication terminal to a different communication path.

  In recent years, with the development of communication service technology, a plurality of communication networks having different communication methods are provided in parallel or adjacent to each other. For example, wireless communication networks include wide-area mobile wireless networks such as second-generation and third-generation mobile phone networks, PHS, IEEE802.11 compliant wireless LAN (IP telephone network), and the like. (IP telephone network), ISDN, PSTN, etc.

A user uses a separate communication terminal for each communication path of a communication network with a different communication method, and considers effective use of each communication network, and uses different communication terminals according to desired communication contents.
As for telephone terminals, telephone terminals called so-called dual network terminals that can be connected to communication paths of communication networks with different communication methods are also provided. This type of telephone terminal includes, for example, a plurality of wireless interfaces having different communication methods such as a wide area mobile wireless network and an IEEE 802.11 wireless LAN.

As a result, by connecting to a wireless LAN in a specific area such as an in-house, a voice call service with a low communication cost such as an IP phone can be used, and many data communication services can be used using an intranet, etc. Outside of a specific area such as, it is possible to connect to a wide area mobile wireless network such as a cellular phone communication network and use a voice call service or a data communication service in a wide area (for example, see Non-patent Document 1). .
In general telephone terminals other than the dual network terminal, a wired telephone terminal is used when present in the office, and a wireless portable telephone terminal is used when moving within the office. Further, there are cases where an in-house telephone terminal and a private mobile phone terminal are selectively used depending on the content of the call.

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However, such a conventional technique has a problem that the user cannot easily switch the communication with the partner communication terminal to the communication using another communication path.
For example, in the case of a mobile phone terminal, even if the above-described dual network terminal is used, the voice call is interrupted when entering or leaving a specific area during the voice call. For this reason, the user needs to disconnect the voice call, move to a new network area, and then call the original party again. It will be a burden.

On the other hand, even in the case of general telephone terminals other than dual network terminals, if it becomes necessary to leave and move during a voice call on a wired telephone terminal, the voice call on the wired telephone terminal is temporarily disconnected and wireless It is necessary to call the original party again from the mobile phone terminal of the mobile phone terminal, which not only does not allow the call to be continued smoothly, but also imposes an operation burden on the user.
In addition, handover between communication networks of different communication methods such as between a wide area mobile wireless network and an IP telephone network via a wireless LAN, or between a wired telephone network and a wireless telephone network is performed on the network side. In order to provide this service, a large capital investment is required.

  The present invention is for solving such a problem, a communication terminal, a communication system, a communication switching control method, and a communication terminal capable of easily switching communication with a counterpart communication terminal to communication using another communication path, and The purpose is to provide a program.

  In order to achieve such an object, a communication terminal according to the present invention is a communication terminal used in a communication system including first and second communication networks connected between networks, and includes a first communication path. A first communication interface unit connected to the first communication network via the second communication interface unit, a second communication interface unit connected to the second communication network via the second communication channel, and the first communication channel. Call control for instructing the first communication network to perform various call control relating to the communication that has been performed, and instructing the second communication network to perform various call control relating to communication using the second communication path. Control is performed according to the communication transfer operation of the user when the first communication is performed using the first communication path between the communication unit and the partner communication terminal connected to the first communication network. Part Switching control for switching the first communication to the communication between the own communication terminal and the other communication terminal using the second communication path by automatically instructing the first and second communication networks to perform a series of call control. The communication switching control unit notifies the transfer start request regarding the first communication from the call control unit to the first communication network, and performs the first communication according to the transfer start request. After the partner communication terminal is put on hold in the network, a communication establishment request regarding the second communication between the own communication terminals using the first communication path and the second communication path is sent from the call control unit to the first communication network. In response to a communication request from the second communication network in response to the communication establishment request, a response to the communication request is notified from the call control unit to the second communication network, and the first communication is performed in response to the response. Communication channel, first After the second communication via the communication network, the second communication network, and the second communication path is established, a transfer activation request for the first communication is notified from the call control unit to the first communication network. After the third communication between the partner communication terminal and the own communication terminal is established via the first communication network, the second communication network, and the second communication path in response to the transfer activation request Instructing the call control unit to disconnect the first communication and the second communication using the first communication path.

  Another communication terminal according to the present invention is a communication terminal used in a communication system including first and second communication networks connected between networks, and is connected to the first communication network via a communication path. Connected to the first communication network, the communication interface unit to be connected, the call control unit for instructing the first communication network to perform various call controls related to communication using the communication path, and the connection and disconnection of the communication. When the first communication is performed with the other communication terminal using the communication path, the call control unit is automatically controlled according to the user's communication transfer operation, and a series of calls to the first communication network is performed. A communication switching control unit that performs switching control to switch the first communication to the communication between the transfer destination communication terminal connected to the second communication network and the counterpart communication terminal by instructing the control; The communication switching control unit notifies the first communication network of a transfer start request for the first communication from the call control unit, and after the partner communication terminal is suspended in the first communication network in response to the transfer start request. The call control unit notifies the first communication network of a communication establishment request regarding the second communication between the own communication terminal and the transfer destination communication terminal via the first communication path, and responds to the communication establishment request. After the second communication via the first communication path, the first communication network, and the second communication network is established, a transfer activation request for the first communication is sent from the call control unit to the first communication network. The third communication between the partner communication terminal and the transfer destination communication terminal is established via the first communication network and the second communication network in response to the transfer activation request, The first using the communication channel It directs cleavage related signal to the call control unit.

For these communication terminals, the second communication network may be configured from the first communication network.
Further, the second communication network may be configured from the first communication network, and the second communication path and the second communication interface unit may be configured from the first communication path and the first communication interface unit, respectively. Good.

  The communication system according to the present invention is connected to the first and second communication networks connected to each other, the communication terminal connected to the first and second communication networks, and the first communication network. A communication system including a partner communication terminal, wherein the communication terminal includes a first communication interface unit connected to the first communication network via the first communication path, and a second communication path via the second communication path. The second communication interface unit connected to the first communication network, and various call controls related to communication using the first communication path are instructed to the first communication network, and various call controls related to communication using the second communication path To the second communication network, and the first communication between the call control unit for controlling connection and disconnection of these communications and the partner communication terminal connected to the first communication network. When the first communication is performed using the route, the call control unit is automatically controlled in accordance with the user's communication transfer operation to instruct a series of call control to the first and second communication networks. A communication switching control unit configured to perform switching control for switching the first communication to communication between the own communication terminal and the partner communication terminal using the second communication path, and the communication switching control unit is configured to transfer the first communication. The start request is notified from the call control unit to the first communication network, and after the counterpart communication terminal is put on hold in the first communication network in response to the transfer start request, the first communication path and the second communication path A communication establishment request regarding the second communication between the own communication terminals using the communication terminal is notified from the call control unit to the first communication network, and in response to the communication request from the second communication network in response to the communication establishment request , The response to the communication request The control unit notifies the second communication network, and the first communication path, the first communication network, the second communication network, and the second communication via the second communication path are established according to the response. After that, a transfer activation request regarding the first communication is notified from the call control unit to the first communication network, and the first communication network, the second communication network, and the second communication according to the transfer activation request. After the third communication between the partner communication terminal and the own communication terminal is established via the path, the call control unit is disconnected from the first communication and the second communication using the first communication path. Instruct.

  Another communication system according to the present invention includes a first and second communication network connected between networks, a communication terminal connected to the first and second communication networks, and a connection to the first communication network. The communication terminal includes a communication interface unit connected to the first communication network via the communication path, and various call controls related to communication using the communication path. A first communication is performed using a communication path between a call control unit that instructs the communication network and controls connection and disconnection of the communication and a partner communication terminal connected to the first communication network. In response to the user's communication transfer operation, the call control unit is automatically controlled to instruct the first communication network to perform a series of call controls, thereby being connected to the second communication network. A communication switching control unit that performs switching control to switch the first communication to the communication between the transfer destination communication terminal and the partner communication terminal. The communication switching control unit sends a transfer start request for the first communication to the call control unit. To the first communication network, and in response to the transfer start request, after the partner communication terminal is put on hold in the first communication network, the own communication terminal and the transfer destination communication terminal via the first communication path A communication establishment request relating to the second communication between the call control unit and the first communication network, and in response to the communication establishment request, the first communication path, the first communication network, and the second communication network are notified. After the second communication is established via the call, the call control unit notifies the first communication network of the transfer activation request for the first communication, and the first communication network and the second communication in response to the transfer activation request. Communication network Via click, after the third communication between the counterpart communication terminal and the destination communication terminal is established, it directs cleavage for the first communication using the first communication channel to the call control unit.

  The communication switching control method according to the present invention is used in a communication system including first and second communication networks connected between networks, and is connected to the first communication network via a first communication path. The first communication interface unit, the second communication interface unit connected to the second communication network via the second communication channel, and various call control related to communication using the first communication channel in the first communication A communication switching control method for a communication terminal, comprising: a call control unit for instructing the network, instructing the second communication network to perform various call controls related to communication using the second communication path, and controlling connection and disconnection of the communication When the communication switching control unit of the communication terminal performs the first communication using the first communication path with the partner communication terminal connected to the first communication network, In response to the communication transfer operation, the call control unit is automatically controlled to instruct a series of call control to the first and second communication networks, so that the own communication terminal and the partner communication terminal using the second communication path A communication switching control step for performing switching control for switching the first communication to the communication with the communication, the communication switching control step notifying a transfer start request relating to the first communication from the call control unit to the first communication network. And communication related to the second communication between the own communication terminals using the first communication path and the second communication path after the counterpart communication terminal is put on hold in the first communication network in response to the transfer start request. A step of notifying the establishment request from the call control unit to the first communication network; and a response to the communication request in response to the communication request from the second communication network in response to the communication establishment request. And a second communication via the first communication path, the first communication network, the second communication network, and the second communication path are established according to the response. Thereafter, a step of notifying the first communication network of the transfer activation request relating to the first communication from the call control unit, and the first communication network, the second communication network, and the second in response to the transfer activation request After the third communication between the partner communication terminal and the own communication terminal is established via the communication channel, the call control controls the disconnection related to the first communication and the second communication using the first communication channel. Instructing the department.

  Further, another communication switching control method according to the present invention is used in a communication system including first and second communication networks connected between networks, and is connected to the first communication network via a communication path. A communication switching control method for a communication terminal comprising an interface unit and a call control unit for instructing the first communication network to perform various call controls related to communication using a communication path, and controlling connection and disconnection of the communication, When the communication switching control unit of the communication terminal performs the first communication using the communication path with the partner communication terminal connected to the first communication network, according to the communication transfer operation of the user The communication between the transfer destination communication terminal connected to the second communication network and the partner communication terminal is performed by automatically controlling the call control unit and instructing the first communication network to perform a series of call control. A communication switching control step for performing switching control for switching one communication, the communication switching control step notifying a transfer start request related to the first communication from the call control unit to the first communication network, and a transfer start request. Accordingly, after the partner communication terminal is put on hold in the first communication network, a communication establishment request regarding the second communication between the own communication terminal and the transfer destination communication terminal via the first communication path is called After the step of notifying the first communication network from the control unit and the second communication via the first communication path, the first communication network, and the second communication network is established in response to the communication establishment request And a step of notifying the first communication network of a transfer activation request relating to the first communication from the call control unit, and the first communication network and the second communication network in response to the transfer activation request. Instructing the call control unit to disconnect the first communication using the first communication path after the third communication between the partner communication terminal and the transfer destination communication terminal is established via the work. including.

  A program according to the present invention is used in a communication system including first and second communication networks connected between networks, and is connected to the first communication network via a first communication path. The communication interface unit, the second communication interface unit connected to the second communication network via the second communication channel, and various call controls related to communication using the first communication channel are instructed to the first communication network Then, the communication terminal computer instructs the second communication network to perform various call controls related to communication using the second communication path, and includes a call control unit that controls connection and disconnection of the communication. When the switching control unit performs the first communication using the first communication path with the partner communication terminal connected to the first communication network, the switching control unit performs the communication transfer operation of the user. Then, by automatically controlling the call control unit and instructing a series of call control to the first and second communication networks, the communication between the own communication terminal and the partner communication terminal using the second communication path is changed. Executing a communication switching control step for performing switching control for switching one communication, and notifying the communication switching control step of a transfer start request relating to the first communication from the call control unit to the first communication network; In response to the request, after the partner communication terminal is put on hold in the first communication network, a communication establishment request regarding the second communication between the own communication terminals using the first communication path and the second communication path, A notification from the call control unit to the first communication network and a response to the communication request in response to the communication request from the second communication network in response to the communication establishment request are sent from the call control unit to the second communication. The first communication path, the first communication network, the second communication network, and the second communication via the second communication path are established in response to the response and the first communication path is established. A step of notifying the first communication network of a transfer activation request relating to the communication of the first communication network, and via the first communication network, the second communication network, and the second communication path according to the transfer activation request. Instructing the call control unit to disconnect the first communication and the second communication using the first communication path after the third communication between the partner communication terminal and the own communication terminal is established. Including.

  Another program according to the present invention is used in a communication system including a first communication network and a second communication network connected between networks, and a communication interface unit connected to the first communication network via a communication path The communication switching control unit of the communication terminal includes a call control unit that instructs the first communication network to perform various call controls related to communication using the communication path and controls connection and disconnection of the communication. When the first communication is performed using the communication path with the partner communication terminal connected to the first communication network, the call control unit is automatically controlled according to the communication transfer operation of the user. By instructing the first communication network to perform a series of call control, the first communication is switched to the communication between the transfer destination communication terminal and the partner communication terminal connected to the second communication network. A communication switching control step for performing the switching control, and a step of notifying the communication switching control step of a transfer start request relating to the first communication from the call control unit to the first communication network, in response to the transfer start request After the partner communication terminal is put on hold in the first communication network, a communication establishment request regarding the second communication between the own communication terminal and the transfer destination communication terminal via the first communication path is sent from the call control unit. After the step of notifying the first communication network and the second communication via the first communication path, the first communication network, and the second communication network are established in response to the communication establishment request, the first communication network A step of notifying the first communication network of a transfer activation request relating to the communication of the first communication network, and via the first communication network and the second communication network in response to the transfer activation request. And, after the third communication between the counterpart communication terminal and the destination communication terminal is established, and a step of instructing the cut for the first communication using the first communication channel to the call control unit.

For these programs, the second communication network may be composed of the first communication network.
Further, the second communication network may be configured from the first communication network, and the second communication path and the second communication interface unit may be configured from the first communication path and the first communication interface unit, respectively. Good.

According to the present invention, the original communication can be easily switched to communication using another communication path only by the user performing a communication transfer operation during communication with the counterpart communication terminal.
Therefore, the present embodiment is applied to a telephone network, for example, as a mobile phone terminal, connected to an IP telephone network via a wireless LAN in a specific area such as an in-house, and a mobile phone communication network or the like outside a specific area such as outside the company. When a dual network terminal connected to a wide area mobile wireless network is used, when a user enters or leaves a specific area during a voice call, the user simply performs a communication transfer operation from the IP phone network to the mobile phone communication network. Alternatively, it is possible to easily switch and connect a voice call from the mobile phone communication network to the IP phone network. This eliminates the need for the user to temporarily disconnect the voice call, move to a new network area, and then call the original party again, allowing the call to continue smoothly with extremely simple operations. It becomes.

  On the other hand, even with a general telephone terminal other than a dual network terminal, when it is necessary to move away from a telephone during a voice call on a wired telephone terminal, the user only needs to perform a communication transfer operation. The voice call can be easily switched and connected from the terminal to the wireless mobile phone terminal. This eliminates the need for the user to temporarily disconnect the voice call and call the original party again, and the call can be continued smoothly with an extremely simple operation.

  In addition, handover between communication networks of different communication methods such as between a wide area mobile wireless network and an IP telephone network via a wireless LAN, or between a wired telephone network and a wireless telephone network is performed on the network side. In order to provide this service, a large capital investment is required. However, in this embodiment, since the existing service function of the communication network is used from the communication terminal side, it is not necessary to add a new function to the communication network. For this reason, it becomes possible to provide a very useful service for the user without requiring capital investment of the communication network.

Next, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
First, a communication system according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration of a communication system according to the first exemplary embodiment of the present invention.

The communication system of FIG. 1 has a function of performing communication such as voice call and data communication between a plurality of communication terminals connected to a communication network and switching a communication destination in response to a request from the communication terminal. ing.
This communication system mainly includes a communication network (first communication network) 2, a call control device 20, a communication network (second communication network) 3, a call control device 30, a communication terminal 10, and a partner communication terminal. 50 is included.

  The communication network 2 includes a communication network that provides a communication service by an arbitrary communication method. The communication network 2 includes a function for arbitrarily connecting a network path in the communication network 2 according to call control of the call control device 20, and a communication path 2A. A function of connecting to the communication terminal 10 via the communication path 2C, a function of connecting to the counterpart communication terminal 50 via the communication path 2C, and a function of connecting to the communication terminal 10 via the relay path 4 and the communication network 3. .

  The call control device 20 includes a network device such as a call control server or a telephone exchange, and is based on call control communication with the communication terminal 10, the partner communication terminal 50, and the call control device 30. It has a function of realizing communication between the communication terminal 10 and the partner communication terminal 50 by controlling the route.

  FIG. 2 is a block diagram illustrating a configuration example of the call control device (transfer source communication network). The call control device 20 includes a communication interface unit (hereinafter referred to as a communication I / F unit) 21, a storage unit 22, a call control unit 23, and a call transfer unit 24 as main functional units. The functional units are connected to each other via an internal communication bus.

The communication I / F unit 21 includes a dedicated communication circuit unit, and has a function of communicating with the communication network 2, the communication terminal 10, the partner communication terminal 50, and the call control device 30.
The storage unit 22 includes a storage device such as a hard disk or a memory, and has a function of storing various processing information and programs used for control operations in the call control unit 23 and the call transfer unit 24.

The call control unit 23 communicates by exchanging various call control information with the communication network 2, the communication terminal 10, the partner communication terminal 50, and the call control device 30 via the communication I / F unit 21. It has a function of controlling communication within the network 2 and realizing communication related to the communication terminal 10 and the partner communication terminal 50.
Specifically, a function for realizing communication 61 between the communication terminal 10 and the partner communication terminal 50 by connecting the communication terminal 10 and the partner communication terminal 50 via a network path in the communication network 2 and communication of the partner communication terminal 50 are communicated to the communication network. 2 is connected between the communication terminal 10 connected to the communication network 2 and the communication terminal 10 of the communication network 3 connected to the relay path 4 via an in-network route. By doing so, it has a function of realizing communication 62 between them.

In response to a transfer start request from the communication terminal 10 connected to the communication network 2, the call transfer unit 24 holds the partner communication terminal 50 in communication with the communication terminal 10, and then performs a new communication from the communication terminal 10. It has a function to realize communication 63 between the two by switching and connecting the partner communication terminal 50 to the transfer destination communication terminal connected in response to the request, here the communication terminal 10 connected to the communication network 3. Yes. As the transfer function of the call transfer unit 24, a service function provided in an existing communication network such as a hold transfer function provided in a mobile phone network (for example, see Non-Patent Document 2) may be used. That's fine.
The call control unit 23 and the call transfer unit 24 are realized by an arithmetic processing unit formed by cooperation of a CPU and a program.

  The communication network 3 includes a communication network that provides a communication service by an arbitrary communication method. The communication network 3 includes a function for arbitrarily connecting a network path in the communication network 3 according to call control of the call control device 30, and a communication path 3A. And a function of connecting to the communication terminal 10 and the partner communication terminal 50 via the relay path 4 and the communication network 2.

  The call control device 30 includes a network device such as a call control server or a telephone exchange, and controls the intra-network route in the communication network 3 based on call control communication with the communication terminal 10 and the call control device 20. Thus, a function for realizing communication between the communication terminal 10 and the counterpart communication terminal 50 is provided.

  FIG. 3 is a block diagram illustrating a configuration example of the call control device (transfer destination communication network). The call control device 30 is provided with a communication interface unit (hereinafter referred to as a communication I / F unit) 31, a storage unit 32, and a call control unit 33 as main functional units. They are connected to each other via a bus.

The communication I / F unit 31 includes a dedicated communication circuit unit, and has a function of communicating with the communication network 3, the communication terminal 10, and the call control device 20.
The storage unit 32 includes a storage device such as a hard disk and a memory, and has a function of storing various processing information and programs used for control operations in the call control unit 33.

  The call control unit 33 exchanges various call control information with the communication network 3, the communication terminal 10, and the call control device 20 via the communication I / F unit 31, thereby It has a function of controlling the internal route and realizing communication related to the communication terminal 10 and the partner communication terminal 50.

Specifically, by connecting the communication terminal 10 of the communication network 2 connected to the relay path 4 and the communication terminal 10 connected to the communication network 3 through a network path in the communication network 3, both Between the communication terminal 50 connected to the relay path 4 and the communication terminal 10 connected to the communication network 3 between the function for realizing the communication 62 between them and the communication terminal 10 connected to the communication network 3. And a function of realizing communication 63 between the two by connecting.
The call control unit 23 is realized by an arithmetic processing unit formed by cooperation of a CPU and a program.

  The communication terminal 10 is composed of an information processing device such as a personal computer or PDA, or a telephone terminal such as a mobile phone terminal, an IP phone terminal, or a wired phone terminal, and has a function of communicating by connecting to the communication network 2 via the communication path 2A. A function of performing communication by connecting to the communication network 3 via the communication path 3A, and a function of performing switching control for switching the communication via the communication path 2A to the communication via the communication path 3A for the communication network 2 And have.

  FIG. 4 is a block diagram illustrating a configuration example of a communication terminal. The communication terminal 10 includes a communication interface (hereinafter referred to as a communication I / F unit) 11, a communication interface (hereinafter referred to as a communication I / F unit) 12, a call control unit 13, a communication switching control unit 14, and a communication processing unit 15. A storage unit 16, an operation unit 17, and a display unit 18 are provided and are connected to each other via an internal communication bus.

The communication I / F unit 11 includes a dedicated communication circuit unit, is connected to the communication network 2 via the communication path 2A, and is connected to the call control device 20, the partner communication terminal 50, and further to the communication network 3. It has a function of performing communication with the communication I / F unit 12 of the terminal 10.
The communication I / F unit 12 includes a dedicated communication circuit unit, and is connected to the communication network 3 via the communication path 3A. The communication I / F unit 12 is connected to the call control device 30 and further to the communication I of the own communication terminal 10 connected to the communication network 2. / F unit 11 has a function of performing communication.
At this time, it is assumed that different communication addresses and telephone numbers are assigned to the communication I / F units 11 and 12 in the communication system including the communication networks 2 and 3.

  The call control unit 13 functions to instruct various call controls related to communication using the communication path 2A by exchanging various call control information with the communication network 2 and the call control device 20 via the communication path 2A. And a function for instructing various call control related to communication using the communication path 3A by exchanging various call control information via the communication path 3A between the communication network 3 and the call control device 30, and these communication And a function of controlling connection and disconnection of communication using the paths 2A and 31.

  When the communication switching operation of the user is detected by the operation unit 17 during the communication 61 with the partner communication terminal 50 via the communication path 2A, the communication switching control unit 14 responds to this detection. By automatically controlling the call control unit 13 and instructing the communication network 2 and the communication network 3 to perform a series of call control, the communication 61 is transmitted to the communication 63 between the own communication terminal 10 and the partner communication terminal 50 using the communication path 3A. It has a function of performing switching control for switching.

The communication processing unit 15 controls the communication I / F unit 11 and the communication I / F unit 12 to perform a voice call and data communication with the counterpart communication terminal 50 via the communication path 2A and the communication path 3A. It has a function.
The call control unit 13, the communication switching control unit 14, and the communication processing unit 15 are realized by an arithmetic processing unit in which a CPU and a program cooperate.
The storage unit 16 includes a storage device such as a hard disk or a memory, and has a function of storing various processing information and programs used for processing operations in the call control unit 13, the communication switching control unit 14, and the communication processing unit 15. Yes. Further, in the storage unit 16, the address information of the communication terminal serving as the transfer destination is registered in association with the communication I / F units 11 and 12 or the communication paths 2A and 3A used for the original communication.

The operation unit 17 includes various operation keys such as a call key, a response key, and a communication transfer key, and operation input devices such as a dial key, a keyboard, and a mouse. It has a function of notifying the control unit 14 and the communication processing unit 15.
The display unit 18 is composed of a screen display device such as an LCD or a PDP. In response to instructions from the call control unit 13, the communication switching control unit 14, and the communication processing unit 15, an operation menu, a telephone number, a communication address, a communication status It has a function to display various information such as.

  The partner communication terminal 50 includes an information processing apparatus such as a personal computer or a PDA, or a general telephone terminal such as a mobile phone terminal, an IP phone terminal, or a wired phone terminal, and is connected to the communication network 2 via a communication path 2C. It has a function to perform communication.

[Operation of First Embodiment]
Next, the operation of the communication system according to the first exemplary embodiment of the present invention will be described with reference to FIG. FIG. 5 is a flowchart showing a communication transfer operation of the communication system according to the first exemplary embodiment of the present invention.
Here, communication (first communication) 61 with the partner communication terminal 50 via the communication path 2A is performed, and communication (second communication) 62 between the own communication terminals 10 via the communication path 2A and the communication path 3A. A case where the communication is switched to communication 63 (third communication) with the partner communication terminal 50 via the communication path 3A will be described as an example. Further, the address information of the communication I / F unit 12 of the own communication terminal 10 is registered in the storage unit 16 as the address information of the transfer destination terminal with respect to the communication I / F unit 11 of the communication path 2A. It is assumed that the address information of the communication I / F unit 11 of the own communication terminal 10 is registered in the communication I / F unit 12 of the path 3A.

When communication between the communication terminal 10 and the partner communication terminal 50 is performing communication 61 via the communication network 2, it becomes necessary to switch the communication with the partner communication terminal 50 from the communication path 2A to the communication path 3A. Operates the communication terminal 10 to instruct communication transfer.
When the communication transfer operation by the user is detected by the operation unit 17, the communication terminal 10 starts a series of communication switching control for the communication 61 by the communication switching control unit 14, and first controls the call control unit 13. A transfer start request is notified to the call control device 20 of the communication network 2.

In response to this transfer start request, the call transfer unit 24 of the call control device 20 starts a series of communication transfer operations for the communication 61. First, the call control unit 23 is controlled to communicate with the partner of the communication 61 in the communication network 2. The communication terminal 50 is put on hold (step 110).
After the counterpart communication terminal 50 is put on hold, the communication switching control unit 14 of the communication terminal 10 controls the call control unit 13 to use the communication path 2A and the communication path 3A to the call control device 20 of the communication network 2. A communication establishment request regarding communication 62 between the own communication terminals 10 is made. At this time, the communication switching control unit 14 acquires the address information of the transfer destination terminal corresponding to the communication I / F unit 11 used in the original communication 61 from the storage unit 16, and transfers the transfer destination address information in the communication establishment request. Specify as.

In response to this communication establishment request, the call transfer unit 24 of the call control device 20 controls the call control unit 23 to make a communication request to the call control device 30 of the communication network 3.
In response to this communication request, the call control unit 33 of the call control device 30 notifies the communication terminal 10 of the communication network 3 of the communication request.
In response to the communication request from the call control device 30, the communication switching control unit 14 of the communication terminal 10 notifies the call control device 30 of the communication network 3 of a response to the communication request from the call control unit 13. This response is notified from the call control device 30 to the call control device 20 and further to the communication terminal 10.

In response to this response, the call transfer unit 24 of the call control device 20 controls the in-network path of the communication network 2 by the call control unit 23, so that the communication path 2A, the communication network 2, the relay path 4, the communication network 3, And the communication 62 between the own communication terminals 10 via the communication path 3A is established (step 120).
In response to the establishment of the communication 62, the communication switching control unit 14 of the communication terminal 10 controls the call control unit 13 to notify the call control device 20 of the communication network 2 of the transfer activation request.

  In response to this transfer activation request, the call transfer unit 24 of the call control device 20 controls the in-network path of the communication network 2 by the call control unit 23, and communicates the partner communication terminal 50 of the communication 61 in the hold state to the communication 62. By establishing a switching connection to the communication terminal 10 on the communication network 3 side, a new communication 63 is established between the counterpart communication terminal 50 and the communication terminal 10 on the communication network 3 side (step 130).

In response to the establishment of the communication 63, the communication switching control unit 14 of the communication terminal 10 controls the call control unit 13 to disconnect the communication 61 using the communication path 2A and disconnect the communication 62 (step 140). .
Thereby, the communication 61 with the counterpart communication terminal 50 via the communication path 2A is transferred to the communication 63 with the counterpart communication terminal 50 via the communication path 3A, and the communication processing unit 15 of the communication terminal 10 starts the communication 63. Is done.

[Effect of the first embodiment]
As described above, in the present embodiment, when the communication terminal 10 performs the communication 61 using the communication path 2 </ b> A with the counterpart communication terminal 50 connected to the communication network 2, the communication transfer of the user. In response to the operation, the communication switching control unit 14 automatically controls the call control unit 13 to instruct the communication networks 2 and 3 to perform a series of call control, so that the communication terminal 10 and the other party communication using the communication path 3A Switching control for switching the original communication 61 to the communication 63 with the terminal 50 is performed. Thereby, during communication with the counterpart communication terminal 50, the user can easily switch the original communication 61 to the communication 63 using the other communication path 3A simply by performing a communication transfer operation.

[Second Embodiment]
Next, a communication system according to the second exemplary embodiment of the present invention will be described with reference to FIG. FIG. 6 is a block diagram showing a configuration of a communication system according to the second exemplary embodiment of the present invention. The same reference numerals are given to the same or equivalent parts as FIG.

In the present embodiment, a case where the communication system according to the first embodiment is applied to a telephone network will be described in detail.
As shown in FIG. 6, the communication system according to the present embodiment includes, as main components, an IP telephone network 2, an IP call control server 20, a mobile telephone network 3, a mobile telephone switch 30, a mobile telephone terminal 10, and The other party telephone terminal 50 is included, and these configurations are the communication network (first communication network) 2, call control device 20, communication network (second communication network) 3, call control in the first embodiment. It is the same as the apparatus 30, the communication terminal 10, and the other party communication terminal 50, and detailed description here is abbreviate | omitted.

[Operation of Second Embodiment]
Next, the operation of the communication system according to the second exemplary embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a sequence diagram showing a call transfer operation of the communication system according to the second exemplary embodiment of the present invention. FIG. 8 is a flowchart showing a call transfer operation of the communication terminal according to the second embodiment of the present invention.

Here, a call (first communication / first call) 61 with the other party telephone terminal 50 via the communication path 2A is used as a call (first communication) between the own mobile phone terminals 10 via the communication path 2A and the communication path 3A. A case where the call is switched to the call 63 (third communication / third call) with the other party's telephone terminal 50 via the communication path 3A via the second communication / second call 62 will be described as an example.
In addition, TEL # 1 is assigned as a telephone number to the communication I / F unit 11 on the IP telephone network 2 side of the mobile phone terminal 10, and TEL # 2 is assigned to the counterpart telephone terminal 50 as a telephone number. It is assumed that TEL # 3 is assigned as a telephone number to the communication I / F unit 12 on the mobile phone network 3 side of the mobile phone terminal 10.

  In addition, the storage unit 16 stores the telephone number TEL # 3 of the communication I / F unit 12 corresponding to the communication I / F unit 11 of the mobile phone terminal 10 as the telephone number (address information) of the transfer destination telephone terminal. It is assumed that the telephone number TEL # 1 of the communication I / F unit 11 is registered in correspondence with the communication I / F unit 12 of the mobile phone terminal 10.

When the mobile phone terminal 10 and the partner phone terminal 50 are making a call 61 via the IP telephone network 2 (step 100), it is necessary to switch the call 61 with the partner phone terminal 50 from the communication path 2A to the communication path 3A. If this occurs, the user operates the mobile phone terminal 10 to instruct call switching (step 111).
When a communication transfer operation by the user is detected by the operation unit 17, the mobile phone terminal 10 starts a series of communication switching control for the call 61 by the communication switching control unit 14, and first controls the call control unit 13. Then, a transfer start request is notified to the IP call control server 20 of the IP telephone network 2 (step 112), and a response reception wait for this transfer start request is awaited (step 112A).

  In response to this transfer start request, the call transfer unit 24 of the IP call control server 20 starts a series of communication transfer operations for the call 61, and first controls the call control unit 23 to instruct the counterpart telephone terminal 50 to hold. (Step 113). Thereafter, in response to the response from the partner telephone terminal 50 in response to the hold instruction (step 114), the response is notified to the mobile phone terminal 10 (step 115), and the in-network route of the IP telephone network 2 is controlled. Thus, the counterpart telephone terminal 50 is put on hold in the IP telephone network 2 (step 116).

  In response to the response from the IP call control server 20, the communication switching control unit 14 of the mobile phone terminal 10 uses the mobile phone terminal as the transfer destination telephone number corresponding to the communication I / F unit 11 used in the original call 61. Ten mobile phone network 3 side telephone numbers TEL # 3 are read from the storage unit 16 (step 120A). Then, the mobile phone using the communication path 2A and the communication path 3A, which controls the call control unit 13 and designates the telephone number TEL # 3 as the transfer destination telephone number to the IP call control server 20 of the IP telephone network 2. A communication establishment request (outgoing) regarding the call 62 between the terminals 10 is notified (step 121), and a response reception in response to the communication establishment request is awaited (step 121A).

In response to this communication establishment request, the call transfer unit 24 of the IP call control server 20 controls the call control unit 23 to make a communication request (outgoing) to the mobile phone switch 30 of the mobile phone network 3 (step 122).
In response to this communication request, the call control unit 33 of the mobile phone switch 30 notifies the mobile phone terminal 10 of the mobile phone network 3 of the communication request (incoming call) (step 123).
In response to a call request from the mobile phone switch 30, the communication switching control unit 14 of the mobile phone terminal 10 notifies the response to the communication request from the call control unit 13 to the mobile phone switch 30 of the mobile phone network 3 (step). 124). At this time, the mobile phone network 3 side telephone number TEL # 3 of the mobile phone terminal 10 is notified as the response side telephone number.

This response is notified from the cellular phone switch 30 to the IP call control server 20 and further to the cellular phone terminal 10 (steps 125 and 126).
In response to this response, the call transfer unit 24 of the IP call control server 20 controls the in-network route of the IP telephone network 2 by the call control unit 23, so that the communication path 2A, the IP telephone network 2, the relay path 4, the mobile phone A call 62 is established between the mobile phone terminals 10 via the telephone network 3 and the communication path 3A (step 127).
In response to the response, the communication switching control unit 14 of the mobile phone terminal 10 controls the call control unit 13 to notify the IP call control server 20 of the IP telephone network 2 of the transfer activation request (step 131). Then, it waits for reception of a response to this transfer activation request (step 131A).

In response to this transfer activation request, the call transfer unit 24 of the IP call control server 20 notifies the mobile phone terminal 10 of the response (step 132), and then the call control unit 23 calls the other party telephone of the call 61 in the hold state. The terminal 50 is instructed to switch the transmission destination to TEL # 3, which is the transfer destination telephone number (step 133).
In response to the destination switching instruction, the partner telephone terminal 50 switches the destination from TEL # 1 to TEL # 3 (step 134) and notifies the IP call control server 20 of a response (step 135). .

In response to this response, the mobile phone switch 30 is instructed to switch the transmission destination to the telephone number TEL # 2 (step 136).
In response to the switching of the transmission destination, the call control unit 33 of the mobile telephone exchange 30 controls the internal route of the mobile telephone network 3 to change the transmission destination of the mobile telephone terminal 10 of the call 62 to TEL # 1. Is switched to TEL # 2 (step 137), and a response is notified to the IP call control server 20 (step 138).
As a result, a new call 63 is established between the partner telephone terminal 50 and the mobile phone terminal 10 on the mobile phone network 3 side (step 139).

In response to the disconnection notification from the IP call control server 20 in response to the establishment of the call 63, the communication switching control unit 14 of the mobile phone terminal 10 controls the call control unit 13 to make a call 61 using the communication path 2A. The call is disconnected (step 141) and the call 62 is disconnected (step 142).
As a result, the call 61 with the counterpart telephone terminal 50 via the communication path 2A is transferred to the call 63 with the counterpart telephone terminal 50 via the communication path 3A, and the communication processing unit 15 of the mobile phone terminal 10 is transferred. Thus, the call 63 is started.

[Effect of the second embodiment]
As described above, in the present embodiment, when the mobile phone terminal 10 makes a call 61 with the partner telephone terminal 50 connected to the IP telephone network 2 using the communication path 2A, the user's In response to the communication transfer operation, the communication switching control unit 14 automatically controls the call control unit 13 to instruct a series of call control to the IP telephone network 2 and the mobile telephone network 3, thereby automatically using the communication path 2A. Switching control is performed to switch the original call 61 to the call 63 between the mobile phone terminal 10 and the partner telephone terminal 50. For this reason, the user can easily switch the call 61 to a call using the other communication path 3 </ b> A simply by performing a communication transfer operation during a call with the other party telephone terminal 50.

  Therefore, for example, as a mobile phone terminal, a dual network terminal that connects to an IP telephone network via a wireless LAN in a specific area such as an in-house, and connects to a wide area mobile wireless network such as a mobile phone communication network outside a specific area such as outside the company. When a user enters or leaves a specific area during a voice call, the user simply performs a communication transfer operation from the IP telephone network to the mobile telephone communication network, or from the mobile telephone communication network to the IP telephone network. It is possible to easily switch and connect voice calls. This eliminates the need for the user to temporarily disconnect the voice call, move to a new network area, and then call the original party again, allowing the call to continue smoothly with extremely simple operations. It becomes.

  Also, in order to provide handover between communication networks with different communication methods, such as between such a wide area mobile wireless network and an IP telephone network via a wireless LAN, a large capital investment is required. Necessary. However, in this embodiment, since the existing service function of the communication network is used from the communication terminal side, it is not necessary to add a new function to the communication network. For this reason, it becomes possible to provide a very useful service for the user without requiring capital investment of the communication network.

  Further, in the present embodiment, the case where call transfer is performed from the IP telephone network 2 to the mobile phone network 3 has been described as an example. However, when call transfer is performed from the mobile phone network 3 to the IP telephone network 2, the mobile phone The call transfer function of the mobile phone switch 30 from the terminal 10 may be used. At this time, in the IP telephone network, the transmission destination is switched by the telephone terminal, but in the cellular phone network, the transmission destination is switched by the cellular telephone network switch, but these operations are performed on the telephone network side. Therefore, the call transfer control in the mobile phone terminal 10 may be performed in the same manner as described above.

  In the present embodiment, the case where the first embodiment is applied to the telephone network composed of the IP telephone network 2 and the cellular telephone network 3 has been described. However, various telephone networks other than the IP telephone network and the cellular telephone network are described. There is. For example, wireless communication networks include wide-area mobile wireless networks such as second-generation and third-generation mobile phone networks, PHS, IEEE802.11 compliant wireless LAN (IP telephone network), and the like. IP telephone network), ISDN, PSTN, etc. Therefore, when the same hold transfer function as described above is provided in these telephone networks, the present embodiment can be applied in the same manner as described above.

  In the present embodiment, in response to the communication request (incoming call) in step 123 in FIG. 7, the response in step 124 may be notified to the cellular phone switch 30 in accordance with the user's operation. When the communication switching control unit 14 of the telephone terminal 10 confirms that the incoming call is received from the mobile phone terminal 10 based on the content (calling number) of the communication request, the incoming call is received without waiting for the user's operation. The communication switch control unit 14 of the mobile phone terminal 10 may be notified automatically of the response of step 124 to the mobile phone switch 30.

[Third Embodiment]
Next, with reference to FIG. 9, a communication system according to a third embodiment of the present invention will be described. FIG. 9 is a block diagram showing a configuration of a communication system according to the third exemplary embodiment of the present invention, and the same reference numerals are given to the same or equivalent parts as FIG.

  In the first embodiment, the communication terminal that is the transfer source is a so-called dual network terminal that can be connected in parallel to two different communication networks, and the communication terminal that is the transfer destination is connected to a different communication network 3. A case where the communication terminal is a self-communication terminal has been described as an example. In the present embodiment, a case will be described in which communication with a counterpart communication terminal is transferred to a communication terminal different from the transfer source communication terminal.

  As shown in FIG. 9, the communication system according to the present embodiment includes, as main components, a communication network (first communication network) 2, a call control device 20, a communication network (second communication network) 3, It includes a call control device 30, a communication terminal 10A, a communication terminal 10B, and a partner communication terminal 50. Among these, configurations other than the communication terminal 10A and the communication terminal 10B are the same as those in the first embodiment, and a detailed description thereof is omitted here.

10 A of communication terminals are the same as that of the said communication terminal 10 except the communication terminal 10 among the communication terminals 10 demonstrated in 1st Embodiment, and the detailed description here. Omitted.
The communication terminal 10B includes an information processing apparatus such as a personal computer or a PDA, or a general telephone terminal such as a mobile phone terminal, an IP phone terminal, or a wired phone terminal, and communicates by connecting to the communication network 3 via the communication path 3A. It has a function to perform.

[Operation of Third Embodiment]
In the communication transfer operation in the present embodiment, the communication (first communication) 61 between the communication terminal 10A and the partner communication terminal 50 via the communication path 2A is transferred to the transfer destination via the communication path 2A and the communication path 3A. The communication is switched to the communication 63 (third communication) between the counterpart communication terminal 50 and the transfer destination communication terminal 10B via the communication (second communication) 62 with the communication terminal 10B.

Therefore, in the communication transfer operation of FIG. 5 described above, after the partner communication terminal 50 is put on hold in Step 120, the communication switching control unit 14 of the communication terminal 10A controls the call control unit 13 to control the communication network 2. A communication establishment request is made to the call control device 20 regarding the communication 62 with the transfer destination communication terminal 10B.
In response to this communication establishment request, the call transfer unit 24 of the call control device 20 controls the call control unit 23 to make a communication request to the call control device 30 of the communication network 3, and in response to this communication request, call control The call control unit 33 of the device 30 notifies the communication request to the communication terminal 10B of the communication network 3.

  In response to the communication request, the communication terminal 10B displays that the communication request has been received, and notifies the call control device 30 of the communication network 3 of a response to the communication request in response to a response operation by the user. Alternatively, an automatic response may be made in response to the communication request, and a response to the communication request may be notified to the call control device 30 of the communication network 3. This response is notified from the call control device 30 to the call control device 20 and further to the communication terminal 10A.

In response to this response, the call transfer unit 24 of the call control device 20 controls the in-network path of the communication network 2 by the call control unit 23, so that the communication path 2A, the communication network 2, the relay path 4, the communication network 3, Communication 62 between communication terminal 10A and communication terminal 10B via communication path 3A is established.
Thereafter, the communication switching operation is performed in the same manner as in the first embodiment.

[Effect of the third embodiment]
As described above, in this embodiment, when communication 61 is performed using communication path 2A with partner communication terminal 50 connected to communication network 2 in communication terminal 10A, the communication transfer of the user is performed. In response to the operation, the communication switching control unit 14 automatically controls the call control unit 13 to instruct the communication network 2 to perform a series of call control, so that the transfer destination communication terminal 10B connected to the communication network 3 and the other party Switching control for switching the original communication 61 to the communication 63 with the communication terminal 50 is performed.
Thereby, during communication with the counterpart communication terminal 50, the user simply performs a communication transfer operation, and the original communication 61 is different from the communication terminal 10A connected to the communication network 3 different from the communication terminal 10A. The communication 63 with the transfer destination communication terminal 10B can be easily switched to.

  Therefore, if this embodiment is applied to a telephone network, even if a general telephone terminal other than a dual network terminal needs to move away from a telephone during a voice call on a wired telephone terminal, The voice call can be easily switched and connected from the wired telephone terminal to the wireless portable telephone terminal simply by performing the communication transfer operation. This eliminates the need for the user to temporarily disconnect the voice call and call the original party again, and the call can be continued smoothly with an extremely simple operation.

  Further, in order to provide a handover between communication networks having different communication methods, such as between such a wired telephone network and a wireless telephone network, a large capital investment is required. However, in this embodiment, since the existing service function of the communication network is used from the communication terminal side, it is not necessary to add a new function to the communication network. For this reason, it becomes possible to provide a very useful service for the user without requiring capital investment of the communication network.

[Fourth Embodiment]
Next, a communication system according to the fourth exemplary embodiment of the present invention will be described with reference to FIG. FIG. 10 is a block diagram showing a configuration of a communication system according to the fourth exemplary embodiment of the present invention. The same or equivalent parts as those in FIG. 9 are denoted by the same reference numerals.

  In the third embodiment, a case has been described in which communication with a counterpart communication terminal is transferred to a separate communication terminal connected to a communication network separate from the transfer source communication terminal. In the present embodiment, a case where communication with a partner communication terminal is transferred to a separate communication terminal connected to the same communication network as the transfer source communication terminal, that is, a case where the communication network 3 includes the communication network 2 will be described. To do.

  As shown in FIG. 10, the communication system according to the present embodiment includes, as main components, a communication network (first communication network) 2, a call control device 20, a communication terminal 10A, a communication terminal 10B, and a partner communication. A terminal 50 is included. Among these, the configuration other than the communication terminal 10B being connected to the communication network 2 is the same as that of the third embodiment, and detailed description thereof is omitted here.

  The communication terminal 10B includes an information processing apparatus such as a personal computer or a PDA, or a general telephone terminal such as a mobile phone terminal, an IP phone terminal, or a wired phone terminal, and communicates by connecting to the communication network 2 via the communication path 2B. It has a function to perform.

[Operation of Fourth Embodiment]
In the communication transfer operation in the present embodiment, the communication (first communication) 61 between the communication terminal 10A and the partner communication terminal 50 via the communication path 2A is transferred to the transfer destination via the communication path 2A and the communication path 2B. The communication is switched to the communication 63 (third communication) between the counterpart communication terminal 50 and the transfer destination communication terminal 10B via the communication (second communication) 62 with the communication terminal 10B.

Therefore, in the communication transfer operation of FIG. 5 described above, after the partner communication terminal 50 is put on hold in Step 120, the communication switching control unit 14 of the communication terminal 10A controls the call control unit 13 to control the communication network 2. A communication establishment request is made to the call control device 20 regarding the communication 62 with the transfer destination communication terminal 10B.
In response to this communication establishment request, the call transfer unit 24 of the call control device 20 controls the call control unit 23 to notify the communication terminal 10B of the communication network 2 of the communication request.

  In response to the communication request, the communication terminal 10B displays that the communication request has been received, and notifies the call control device 20 of the communication network 2 of a response to the communication request in response to a response operation by the user. Alternatively, an automatic response may be made in response to the communication request, and a response to the communication request may be notified to the call control device 20 of the communication network 2. This response is notified from the call control device 20 to the communication terminal 10A.

In response to this response, the call transfer unit 24 of the call control device 20 controls the in-network path of the communication network 2 by the call control unit 23, and performs communication via the communication path 2A, the communication network 2, and the communication path 2B. Communication 62 between terminal 10A and communication terminal 10B is established.
Thereafter, the communication switching operation is performed in the same manner as in the first embodiment.

[Effect of the fourth embodiment]
As described above, in this embodiment, when communication 61 is performed using communication path 2A with partner communication terminal 50 connected to communication network 2 in communication terminal 10A, the communication transfer of the user is performed. In response to the operation, the communication switching control unit 14 automatically controls the call control unit 13 to instruct the communication network 2 to perform a series of call control, so that the transfer destination communication terminal 10B connected to the communication network 2 and the other party Switching control for switching the original communication 61 to the communication 63 with the communication terminal 50 is performed.
Thus, the communication 61 is different from the communication terminal 10A in which the original communication 61 is connected to the same communication network 2 as the communication terminal 10A only by the user performing a communication transfer operation during communication with the counterpart communication terminal 50. The communication 63 with the transfer destination communication terminal 10B can be easily switched to.

  Therefore, if this embodiment is applied to a telephone network, even if a general telephone terminal other than a dual network terminal is a private voice call received at a work mobile telephone terminal, the user can By simply performing a communication transfer operation, it is possible to easily switch and connect a voice call to a user's personal use mobile phone terminal. This eliminates the need for the user to temporarily disconnect the voice call and call the original party again, and the call can be continued smoothly with an extremely simple operation.

[Fifth Embodiment]
Next, a communication system according to the fifth exemplary embodiment of the present invention will be described with reference to FIG. FIG. 11 is a block diagram showing a configuration of a communication system according to the fifth exemplary embodiment of the present invention. The same or equivalent parts as those in FIG. 10 are denoted by the same reference numerals.

  In the fourth embodiment, a case has been described in which communication with a counterpart communication terminal is transferred to a separate communication terminal connected to the same communication network as the transfer source communication terminal. In the present embodiment, the transfer source communication terminal is a so-called dual network terminal and transfers communication with the counterpart communication terminal to the own communication terminal connected to the same communication network as the communication terminal, that is, communication. A case will be described in which the network 3 includes the communication network 2, and the second communication path and the second communication interface unit include the first communication path and the first communication interface unit, respectively.

  As shown in FIG. 11, the communication system according to the present embodiment includes a communication network (first communication network) 2, a call control device 20, a communication terminal 10, and a partner communication terminal 50 as main components. It is out. Among these, the configuration except that the communication terminal 10 is connected to the communication network 2 via different communication paths 2A and 2B is the same as that of the fourth embodiment, and detailed description thereof is omitted here.

[Operation of Fifth Embodiment]
In the communication transfer operation in the present embodiment, the communication (first communication) 61 between the communication terminal 10 and the partner communication terminal 50 via the communication path 2A is performed, and the own communication via the communication path 2A and the communication path 2B. Through communication (second communication) 62 with the terminal 10, communication switching is performed to the communication 63 (third communication) of the own communication terminal 10 via the communication path 2B with the counterpart communication terminal 50.

Therefore, in the communication transfer operation of FIG. 5 described above, after the partner communication terminal 50 is put on hold in step 120, the communication switching control unit 14 of the communication terminal 10 controls the call control unit 13 to control the communication network 2. A communication establishment request is made to the call control device 20 regarding the communication 62 between the own communication terminals 10 via the communication path 2A and the communication path 2B.
In response to this communication establishment request, the call transfer unit 24 of the call control device 20 controls the call control unit 23 to notify the communication terminal 10B of the communication network 2 of the communication request.

In response to the communication request from the call control device 20, the communication switching control unit 14 of the communication terminal 10 notifies the call control device 20 of a response to the communication request. This response is notified from the call control device 20 to the communication terminal 10.
In response to this response, the call transfer unit 24 of the call control device 20 controls the in-network path of the communication network 2 by the call control unit 23, and performs communication via the communication path 2A, the communication network 2, and the communication path 2B. Communication 62 between the terminals 10 is established.
Thereafter, the communication switching operation is performed in the same manner as in the first embodiment.

[Effect of Fifth Embodiment]
As described above, in the present embodiment, when the communication terminal 10 performs the communication 61 using the communication path 2 </ b> A with the counterpart communication terminal 50 connected to the communication network 2, the communication transfer of the user. In response to the operation, the communication switching control unit 14 automatically controls the call control unit 13 to instruct the communication network 2 to perform a series of call control, so that the own communication connected to the communication network 2 via the communication path 2B. Switching control for switching the original communication 61 to the communication 63 with the terminal 10 is performed.
As a result, during the communication with the partner communication terminal 50, the user simply performs a communication transfer operation, and the communication 61 with the partner communication terminal 50 using the communication path 2A can be performed by the communication terminal 10 using the communication path 2B. It is possible to easily switch to the communication 63.

[Extended embodiment]
In the above, the case where the communication system according to the present invention is applied to the telephone network in the second embodiment has been described as a specific application example. However, the same applies to a data communication network that performs general data communication. Applicable. In particular, in a streaming service such as a videophone or video distribution using a data communication network, data communication is continuously performed for a certain period, so that it may be necessary to switch communication terminals during communication. If the present invention is applied to this data communication network, the data communication during communication is transferred to any communication terminal of any communication network with an extremely simple operation without temporarily disconnecting the data communication, and the data communication is continued. Is possible.

  In each embodiment, the case where the call switching operation is started according to the user's operation has been described. However, the call switching operation may be automatically started according to the communication status. For example, the communication switching control unit 14 monitors the communication status such as the radio wave reception level obtained by the communication I / F unit 11 and the communication error occurrence rate obtained by the communication I / F unit 11 or the communication processing unit 15. If the communication situation deteriorates, such as when the radio wave reception level falls below the threshold, or the communication error rate rises above the threshold, the communication switching operation can be started automatically. Good. As a result, for example, when the communication terminal is a mobile phone terminal, the communication path can be switched quickly according to the radio wave reception status or communication error status without waiting for the user's operation, and a stable call can be maintained. can do.

It is a block diagram which shows the structure of the communication system concerning the 1st Embodiment of this invention. It is a block diagram which shows the structural example of a call control apparatus (transfer origin communication network). It is a block diagram which shows the structural example of a call control apparatus (transfer destination communication network). It is a block diagram which shows the structural example of a communication terminal. It is a flowchart which shows the communication transfer operation | movement of the communication system concerning the 1st Embodiment of this invention. It is a block diagram which shows the structure of the communication system concerning the 2nd Embodiment of this invention. It is a sequence diagram which shows the telephone call transfer operation | movement of the communication system concerning the 2nd Embodiment of this invention. It is a flowchart which shows the call transfer operation | movement of the communication terminal concerning the 2nd Embodiment of this invention. It is a block diagram which shows the structure of the communication system concerning the 3rd Embodiment of this invention. It is a block diagram which shows the structure of the communication system concerning the 4th Embodiment of this invention. It is a block diagram which shows the structure of the communication system concerning the 5th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,10A ... Communication terminal (cellular phone terminal), 10B ... Communication terminal, 11, 12 ... Communication I / F part, 13 ... Call control part, 14 ... Communication switching control part, 15 ... Communication processing part, 16 ... Memory | storage part , 17 ... operation section, 18 ... display section, 20 ... call control device (IP call control server), 21 ... communication I / F section, 22 ... storage section, 23 ... call control section, 24 ... call transfer section, 30 ... Call control device (mobile phone exchange), 31 ... communication I / F unit, 32 ... storage unit, 33 ... call control unit, 50 ... partner communication terminal (partner phone terminal), 61, 62, 63 ... communication (call), 2 ... Communication network (IP telephone network), 2A, 2B, 2C ... Communication path, 3 ... Communication network (mobile phone network), 3A ... Communication path, 4 ... Relay path.

Claims (12)

A communication terminal used in a communication system including first and second communication networks connected between networks,
A first communication interface unit connected to the first communication network via a first communication path;
A second communication interface unit connected to the second communication network via a second communication path;
Instructing the first communication network various call controls related to communication using the first communication path, instructing the second communication network to perform various call controls related to communication using the second communication path, A call control unit for controlling connection and disconnection of these communications;
When the first communication is performed with the other communication terminal connected to the first communication network using the first communication path, the call control is performed according to a user's communication transfer operation. The first and second communication networks are automatically controlled to instruct a series of call control to communicate between the own communication terminal and the counterpart communication terminal using the second communication path. A communication switching control unit for performing switching control for switching between
The communication switching control unit
A transfer start request for the first communication is notified from the call control unit to the first communication network;
In response to the transfer start request, after the counterpart communication terminal is put on hold in the first communication network, a second communication between the own communication terminals using the first communication path and the second communication path is performed. A communication establishment request for communication is notified from the call control unit to the first communication network;
In response to a communication request from the second communication network in response to the communication establishment request, a response to the communication request is notified from the call control unit to the second communication network,
After the first communication path, the first communication network, the second communication network, and the second communication via the second communication path are established in response to the response, the first communication path A transfer activation request regarding the communication of the first communication network from the call control unit to the first communication network,
In response to the transfer activation request, a third communication between the partner communication terminal and the own communication terminal via the first communication network, the second communication network, and the second communication path is performed. After being established, the call control unit is instructed to disconnect the first communication and the second communication using the first communication path. A communication terminal used in a communication system including first and second communication networks connected between networks,
A communication interface unit connected to the first communication network via a communication path;
A call control unit that instructs the first communication network to perform various call controls related to communication using the communication path, and controls connection and disconnection of the communication;
When the first communication is performed with the other communication terminal connected to the first communication network using the communication path, the call control unit is automatically operated according to the communication transfer operation of the user. By controlling and instructing a series of call control to the first communication network, the first communication is transferred to communication between the transfer destination communication terminal connected to the second communication network and the counterpart communication terminal. A communication switching control unit for performing switching control to switch,
The communication switching control unit
A transfer start request for the first communication is notified from the call control unit to the first communication network;
In response to the transfer start request, after the counterpart communication terminal is put on hold in the first communication network, a second communication between the own communication terminal and the transfer destination communication terminal via the first communication path. A communication establishment request for communication is notified from the call control unit to the first communication network;
In response to the communication establishment request, transfer initiation related to the first communication after the second communication via the first communication path, the first communication network, and the second communication network is established. A request from the call control unit to the first communication network;
After the third communication between the counterpart communication terminal and the transfer destination communication terminal is established via the first communication network and the second communication network in response to the transfer activation request, A communication terminal that instructs the call control unit to disconnect the first communication using the first communication path. In the communication terminal according to claim 1 or claim 2,
The communication terminal, wherein the second communication network is the first communication network. The communication terminal according to claim 1,
The second communication network includes the first communication network, and the second communication path and the second communication interface unit include the first communication path and the first communication interface unit, respectively. A communication terminal characterized by. A communication system including first and second communication networks connected between networks, a communication terminal connected to the first and second communication networks, and a counterpart communication terminal connected to the first communication network Because
The communication terminal is
A first communication interface unit connected to the first communication network via a first communication path;
A second communication interface unit connected to the second communication network via a second communication path;
Instructing the first communication network various call controls related to communication using the first communication path, instructing the second communication network to perform various call controls related to communication using the second communication path, A call control unit for controlling connection and disconnection of these communications;
When the first communication is performed with the other communication terminal connected to the first communication network using the first communication path, the call control is performed according to a user's communication transfer operation. The first and second communication networks are automatically controlled to instruct a series of call control to communicate between the own communication terminal and the counterpart communication terminal using the second communication path. A communication switching control unit for performing switching control for switching between
The communication switching control unit
A transfer start request for the first communication is notified from the call control unit to the first communication network;
In response to the transfer start request, after the counterpart communication terminal is put on hold in the first communication network, a second communication between the own communication terminals using the first communication path and the second communication path is performed. A communication establishment request for communication is notified from the call control unit to the first communication network;
In response to a communication request from the second communication network in response to the communication establishment request, a response to the communication request is notified from the call control unit to the second communication network,
After the first communication path, the first communication network, the second communication network, and the second communication via the second communication path are established in response to the response, the first communication path A transfer activation request regarding the communication of the first communication network from the call control unit to the first communication network,
In response to the transfer activation request, a third communication between the partner communication terminal and the own communication terminal via the first communication network, the second communication network, and the second communication path is performed. After being established, the call control unit is instructed to disconnect the first communication and the second communication using the first communication path. A communication system including first and second communication networks connected between networks, a communication terminal connected to the first and second communication networks, and a counterpart communication terminal connected to the first communication network Because
The communication terminal is
A communication interface unit connected to the first communication network via a communication path;
A call control unit that instructs the first communication network to perform various call controls related to communication using the communication path, and controls connection and disconnection of the communication;
When the first communication is performed with the other communication terminal connected to the first communication network using the communication path, the call control unit is automatically operated according to the communication transfer operation of the user. By controlling and instructing a series of call control to the first communication network, the first communication is transferred to communication between the transfer destination communication terminal connected to the second communication network and the counterpart communication terminal. A communication switching control unit for performing switching control to switch,
The communication switching control unit
A transfer start request for the first communication is notified from the call control unit to the first communication network;
In response to the transfer start request, after the counterpart communication terminal is put on hold in the first communication network, a second communication between the own communication terminal and the transfer destination communication terminal via the first communication path. A request for establishment of communication is notified from the call control unit to the first communication network;
In response to the establishment request, after the second communication via the first communication path, the first communication network, and the second communication network is established, a transfer activation request related to the first communication From the call control unit to the first communication network,
After the third communication between the counterpart communication terminal and the transfer destination communication terminal is established via the first communication network and the second communication network in response to the transfer activation request, A communication system instructing the call control unit to disconnect the first communication using the first communication path. A first communication interface unit used in a communication system including a first communication network and a second communication network connected between networks, and connected to the first communication network via a first communication path; The second communication interface unit connected to the second communication network via the communication path, and various call controls related to communication using the first communication path are instructed to the first communication network, and the second A communication switching control method for a communication terminal, comprising: a call control unit that instructs the second communication network to perform various call controls related to communication using the communication path of the communication path, and controls connection and disconnection of the communication;
When the communication switching control unit of the communication terminal performs the first communication with the partner communication terminal connected to the first communication network using the first communication path, In response to a communication transfer operation, by automatically controlling the call control unit and instructing a series of call control to the first and second communication networks, the own communication terminal using the second communication path and the A communication switching control step for performing switching control for switching the first communication to communication with a counterpart communication terminal;
The communication switching control step includes
Notifying a transfer start request for the first communication from the call control unit to the first communication network;
In response to the transfer start request, after the counterpart communication terminal is put on hold in the first communication network, a second communication between the own communication terminals using the first communication path and the second communication path is performed. Notifying a communication establishment request regarding communication from the call control unit to the first communication network;
In response to a communication request from the second communication network in response to the communication establishment request, notifying a response to the communication request from the call control unit to the second communication network;
After the first communication path, the first communication network, the second communication network, and the second communication via the second communication path are established in response to the response, the first communication path A step of notifying the first communication network of a transfer activation request related to the communication of the first communication network;
In response to the transfer activation request, a third communication between the partner communication terminal and the own communication terminal via the first communication network, the second communication network, and the second communication path is performed. And a step of instructing the call control unit to disconnect the first communication and the second communication using the first communication path after being established. A communication interface unit that is used in a communication system including a first communication network and a second communication network that are connected to each other and is connected to the first communication network via a communication path, and various types of communication that use the communication path. A communication switching control method for a communication terminal, comprising: a call control unit that instructs call control to the first communication network and controls connection and disconnection of the communication;
When the communication switching control unit of the communication terminal performs the first communication using the communication path with the partner communication terminal connected to the first communication network, the communication transfer operation of the user Accordingly, the call control unit is automatically controlled to instruct a series of call control to the first communication network, so that the transfer destination communication terminal connected to the second communication network and the counterpart communication terminal A communication switching control step for performing switching control for switching the first communication to communication with
The communication switching control step includes
Notifying a transfer start request for the first communication from the call control unit to the first communication network;
In response to the transfer start request, after the counterpart communication terminal is put on hold in the first communication network, a second communication between the own communication terminal and the transfer destination communication terminal via the first communication path. Notifying a communication establishment request regarding communication from the call control unit to the first communication network;
In response to the communication establishment request, transfer initiation related to the first communication after the second communication via the first communication path, the first communication network, and the second communication network is established. Notifying the request from the call control unit to the first communication network;
After the third communication between the counterpart communication terminal and the transfer destination communication terminal is established via the first communication network and the second communication network in response to the transfer activation request, Instructing the call control unit to disconnect the first communication using the first communication path. A communication switching control method comprising: A first communication interface unit used in a communication system including a first communication network and a second communication network connected between networks, and connected to the first communication network via a first communication path; The second communication interface unit connected to the second communication network via the communication path, and various call controls related to communication using the first communication path are instructed to the first communication network, and the second Instructing the second communication network about various call controls related to communication using the communication path of the communication path, and a computer of a communication terminal comprising a call control unit for controlling connection and disconnection of these communications,
When the communication switching control unit of the communication terminal performs the first communication with the partner communication terminal connected to the first communication network using the first communication path, In response to a communication transfer operation, by automatically controlling the call control unit and instructing a series of call control to the first and second communication networks, the own communication terminal using the second communication path and the Executing a communication switching control step for performing switching control for switching the first communication to communication with the partner communication terminal;
In the communication switching control step,
Notifying a transfer start request for the first communication from the call control unit to the first communication network;
In response to the transfer start request, after the counterpart communication terminal is put on hold in the first communication network, a second communication between the own communication terminals using the first communication path and the second communication path is performed. Notifying a communication establishment request regarding communication from the call control unit to the first communication network;
In response to a communication request from the second communication network in response to the communication establishment request, notifying a response to the communication request from the call control unit to the second communication network;
After the first communication path, the first communication network, the second communication network, and the second communication via the second communication path are established in response to the response, the first communication path A step of notifying the first communication network of a transfer activation request related to the communication of the first communication network;
In response to the transfer activation request, a third communication between the partner communication terminal and the own communication terminal via the first communication network, the second communication network, and the second communication path is performed. And a step of instructing the call control unit to disconnect the first communication and the second communication using the first communication path after being established. A communication interface unit that is used in a communication system including a first communication network and a second communication network that are connected to each other and is connected to the first communication network via a communication path, and various types of communication that use the communication path. Instructing call control to the first communication network, a computer of a communication terminal comprising a call control unit for controlling connection and disconnection of the communication,
When the communication switching control unit of the communication terminal performs the first communication using the communication path with the partner communication terminal connected to the first communication network, the communication transfer operation of the user Accordingly, the call control unit is automatically controlled to instruct a series of call control to the first communication network, so that the transfer destination communication terminal connected to the second communication network and the counterpart communication terminal A communication switching control step for performing switching control for switching the first communication to communication with
In the communication switching control step,
Notifying a transfer start request for the first communication from the call control unit to the first communication network;
In response to the transfer start request, after the counterpart communication terminal is put on hold in the first communication network, a second communication between the own communication terminal and the transfer destination communication terminal via the first communication path. Notifying a communication establishment request regarding communication from the call control unit to the first communication network;
In response to the communication establishment request, transfer initiation related to the first communication after the second communication via the first communication path, the first communication network, and the second communication network is established. Notifying the request from the call control unit to the first communication network;
After the third communication between the counterpart communication terminal and the transfer destination communication terminal is established via the first communication network and the second communication network in response to the transfer activation request, A step of instructing the call control unit to disconnect the first communication using the first communication path. In the program according to claim 9 or claim 10,
The program characterized in that the second communication network is the first communication network. The program according to claim 9,
The second communication network includes the first communication network, and the second communication path and the second communication interface unit include the first communication path and the first communication interface unit, respectively. A program characterized by

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