JP2016082401A - Communication system and communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent communication disconnection in accommodation change of user terminals in a signal controller.SOLUTION: A signal controller 1a processes a signal transmitted from a user terminal 7a being accommodated and transfers resource information for communication control of the signal, to a signal controller 1b. On the other hand, the signal controller 1b receives the resource information transferred from the signal controller 1a and when a continuation signal under communication is transmitted from the user terminal 7a, performs processing by using the transferred resource information.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a technique for changing or migrating a terminal accommodation destination that can belong to a signal control apparatus in a communication system via the signal control apparatus.

  Currently, there are communication systems that perform communication through a signal control device such as a call processing server. A network configuration example of the communication system is shown in FIG. The communication system includes a plurality of signal control devices 1a and 1b that control signals from the user terminals 7a to 7d, and a network device 3 that transmits the signals to the signal control devices 1a and 1b. The From the viewpoint of high reliability of the entire system, a configuration in which the signal control device 1 is duplicated or an ACT-SBY configuration is adopted.

  Here, the signal control device 1 has a function of managing the belonging relationship of the user terminal to the signal control device in addition to the original function of the device that controls the signal. For example, when the signal control device 1a accommodates the user terminals 7a and 7b and receives a signal via the interface of the IP address of “XX.X.X”, the signal control device # 1 in FIG. Hold the attribution information described.

  When the accommodation destination of the user terminals 7a and 7b is changed to the signal control device 1b by system switching or terminal accommodation destination switching described in paragraphs 0002-0006 of Patent Document 1, as shown in FIG. The device 1a transmits the held belonging relationship information to the signal control device 1b to be changed. And the signal control apparatus 1b newly accommodates the user terminals 7a and 7b by additionally registering in its own belonging relationship information.

  On the other hand, the user terminals 7a and 7b change the IP address of the connection destination to the IP address “YYYY” of the signal control device 1b in order to communicate with the signal control device 1b which is a new accommodation destination. Alternatively, as shown in FIG. 15, the signal control device 1 b receives the IP address of the signal control device 1 a from the signal control device management device 5, and applies the address unassigned interface # 2 connected to the network device 3. An IP address is assigned, and the network device 3 is instructed to send a signal to the IP address to the interface # 2 (ARP table cache update instruction).

JP 2013-219707 A

  However, since the record during communication is not inherited by the signal control apparatus of the transfer destination, the signal or call during communication is disconnected. For example, as illustrated in FIG. 16, when the user terminal 7a is switched to the signal control device 1b during communication with the user terminal 7d, the user control device 1b transmits a continuation signal such as Re-INVITE to the signal control device 1b. Send. However, since the signal control device 1b does not hold recording information during communication performed between the user terminal 7a and the user terminal 7d, an error is returned to the user terminal 7a. As a result, the communication call between both terminals is disconnected.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent disconnection of communication at the time of changing accommodation of a user terminal with respect to a signal control device.

  In order to solve the above problems, a communication system according to claim 1 includes a first signal control device and a second signal control device, and controls communication of a signal transmitted from a user terminal via a network device. In the system, the first signal control device transfers processing information for processing a signal transmitted from the accommodated user terminal and resource information for controlling communication of the signal to the second signal control device. Transfer means, wherein the second signal control device receives the address information of the first signal control device from the management device, and an address unassigned interface connected to the network device Assigning means for allocating the address information to, receiving means for receiving the resource information transferred from the first signal control device, and a signal to the address information. Command means for instructing the network device to transmit to the interface, and processing means for processing using the transferred resource information when a continuation signal during communication is transmitted from the user terminal via the interface The gist is to have.

  According to the present invention, the first signal control device includes a first signal control device and a second signal control device, the first signal control device processes a signal transmitted from the user terminal being accommodated, and controls communication of the signal. Resource information is transferred to the second signal controller. On the other hand, when the second signal control apparatus receives the resource information transferred from the first signal control apparatus and transmits a continuation signal during communication from the user terminal, the second signal control apparatus performs processing using the transferred resource information. To do. Thereby, disconnection of communication at the time of changing the accommodation of the user terminal to the signal control device can be prevented.

  The communication system according to claim 2, comprising a first signal control device and a second signal control device, wherein the first signal is controlled in a communication system that controls a signal transmitted from a user terminal via a network device. The control device includes: processing means for processing a signal transmitted from the accommodated user terminal; transfer means for transferring resource information for communication control of the signal to the second signal control device; and A transmission means for transmitting to the second signal control device when a continuation signal during communication is transmitted, wherein the second signal control device is a resource transferred from the first signal control device. The gist of the present invention is to include receiving means for receiving information and processing means for processing using the transferred resource information when the continuation signal during communication is received.

  According to the present invention, the first signal control device includes a first signal control device and a second signal control device, the first signal control device processes a signal transmitted from the user terminal being accommodated, and controls communication of the signal. Resource information is transferred to the second signal control device, and when a continuation signal during communication is transmitted from the user terminal, the resource information is transmitted to the second signal control device. On the other hand, when the second signal control apparatus receives the resource information transferred from the first signal control apparatus and receives the continuation signal during communication, the second signal control apparatus processes using the transferred resource information. Thereby, disconnection of communication at the time of changing the accommodation of the user terminal to the signal control device can be prevented.

  The communication system according to claim 3 is the communication system according to claim 2, wherein the second signal control device receives address information of the first signal control device from a management device; An assigning means for assigning the address information to an unassigned interface connected to a network device, and a virtual signal control device having the same function as the first signal control device are generated in the own device, and the interface is assigned. Generating means, and command means for instructing the network device to transmit a signal to the address information to the interface, wherein the virtual signal control device is communicating with the user terminal via the interface When the continuation signal is transmitted, it is transmitted to the second signal control device.

  According to the present invention, the second signal control device generates a virtual signal control device having the same function as the first signal control device in the own device, and the virtual signal control device is communicating with the user terminal. When the continuation signal is transmitted, it is transmitted to the second signal control device, so that it is possible to prevent disconnection of communication when the user terminal is accommodated in the signal control device.

  The communication method according to claim 4, comprising a first signal control device and a second signal control device, wherein the first signal is controlled in a communication method for controlling a signal transmitted from a user terminal via a network device. The control device includes a processing step of processing a signal transmitted from the accommodated user terminal, and a transfer step of transferring resource information for controlling communication of the signal to the second signal control device, The second signal control device includes a reception step of receiving address information of the first signal control device from a management device, and an assignment step of assigning the address information to an unassigned interface connected to the network device. A receiving step for receiving resource information transferred from the first signal control apparatus; and a signal for the address information. An instruction step for instructing the network device to transmit to a network, and a processing step for processing using the transferred resource information when a continuation signal during communication is transmitted from the user terminal via the interface; The gist is to have.

  The communication method according to claim 5, comprising a first signal control device and a second signal control device, wherein the first signal is controlled in a communication method for controlling a signal transmitted from a user terminal via a network device. The control device uses the processing means to process the signal transmitted from the accommodated user terminal, and transfers the resource information for controlling communication of the signal to the second signal control device using the transfer means. A transfer step, and a transmission step of transmitting to the second signal control device when a continuation signal during communication is transmitted from the user terminal by the transmission means, and the second signal control device comprises: When receiving means receives the resource information transferred from the first signal control device, and when the processing means receives the continuation signal during communication, A processing step of processing using the resource information, and summarized in that with.

  The communication method according to claim 6 is the communication method according to claim 5, wherein the second signal control device receives the address information of the first signal control device from the management device by the receiving unit. A virtual signal control device having the same function as that of the first signal control device by a generation unit, and an allocation step of allocating the address information to an unallocated interface connected to the network device by an allocation unit. And a command step for instructing the network device to transmit a signal to the address information to the interface by a command means. The signal control device transmits a continuation signal during communication from the user terminal via the interface. If it, to increase the transmission to the second signal control device.

  ADVANTAGE OF THE INVENTION According to this invention, the cutting | disconnection of the communication at the time of accommodation change of the user terminal with respect to a signal control apparatus can be prevented.

It is a figure which shows the network structure of a communication system. It is a figure which shows the functional block structure of the signal control apparatus management apparatus which concerns on 1st Embodiment. It is a figure which shows the functional block structure of each signal control apparatus which concerns on 1st Embodiment. It is a reference figure at the time of explaining the processing operation of the communication system concerning a 1st embodiment. It is a figure which shows the flow of the signal before and behind the switching of the system | strain in 1st Embodiment. It is a figure which shows the functional block structure of each signal control apparatus which concerns on 2nd Embodiment. It is a figure which shows the functional block structure of the signal control apparatus management apparatus which concerns on 2nd Embodiment. It is a reference figure at the time of explaining the processing operation in the state 1 of the communication system which concerns on 2nd Embodiment. It is a reference figure at the time of explaining the processing operation in the state 2 of the communication system which concerns on 2nd Embodiment. It is a reference figure at the time of explaining the processing operation in the state 3 of the communication system which concerns on 2nd Embodiment. It is a reference figure at the time of explaining the processing operation in the state 4 of the communication system which concerns on 2nd Embodiment. It is a reference figure at the time of explaining the processing operation in the state 5 of the communication system which concerns on 2nd Embodiment. It is a figure which shows the network structural example of the conventional communication system. It is a reference figure at the time of explaining the operation | movement at the time of the accommodation destination change of a user terminal. It is a reference figure at the time of explaining the operation | movement at the time of the accommodation destination change of a user terminal. It is a reference figure at the time of explaining the subject at the time of accommodation destination change.

  Hereinafter, an embodiment for carrying out the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a diagram illustrating a network configuration of a communication system according to the first embodiment. This communication system further includes a signal control device management device 5 for managing the signal control device 1 with respect to the conventional network configuration shown in FIG.

  FIG. 2 is a diagram showing a functional block configuration of the signal control device management device 5 according to the present embodiment. The signal control device management device 5 includes a subscriber information storage unit 51 that stores subscriber information of user terminals, a subscriber information setting unit 52 that inputs the subscriber information to the signal control device 1, and a signal control device 1 A system switching unit 53 that switches between active / non-operating systems and a GUI unit 54 that provides a screen for performing subscriber information setting processing and system switching control processing are provided. The signal control device management device 5 is communicably connected to all the signal control devices 1a and 1b, and is operated by a manager or a maintenance person of the communication system.

  FIG. 3 is a diagram showing a functional block configuration of the signal control device 1a and the signal control device 1b according to the present embodiment. All these functional units may be mounted on one signal control device.

  The signal control device 1a includes a resource information storage unit 11a that stores resource information (including a recording during communication) necessary for signal communication control, and a signal processing unit 12a that processes a signal from the user terminal 7 using the resource information. And the resource information transfer unit 13a for transferring the resource information stored in the own apparatus to another signal control apparatus 1b, and the own apparatus based on the system switching signal input from the signal control apparatus management apparatus 5 And a system switching execution unit 14a for switching to the system.

  The signal control device 1b includes an attribution information storage unit 11b that stores attribution information that defines the attribution relationship of the user terminal with respect to the signal control device, and subscriber information (the attribution information that is input from the signal control device management device 5). Subscriber information registration unit 12b for registering in the membership information storage unit 11b, and an IP address allocation unit 13b that acquires an IP address from the membership information in the subscriber information and assigns the IP address to a new interface in the own device. And a destination change command unit 14b for notifying the network device 3 of a command for transmitting a signal to the IP address to the assigned interface, and resource information reception for receiving resource information transferred from another signal control device 1a. Unit 15b and resource information storage unit 1 for storing the received resource information and the resource information recorded in the device itself b, a signal processing unit 17b that processes a signal from the user terminal 7 using the resource information, and a system switching signal input from the signal control device management device 5 to switch the own device to an active system or a non-operating system. A system switching execution unit 18b.

  The network device 3 and the user terminal 7 are realized using existing ones. As the network device 3, for example, a switching hub, a layer 2 switch, a router, or the like is used. A forwarding table called an ARP (Address Resolution Protocol) table is provided, and the IP address and the MAC address of a device connected to the own device are linked and managed. When a signal is received from the user terminal 7, it is transmitted to an interface device having a MAC address corresponding to the destination IP address in the signal packet.

  As the user terminal 7, for example, a mobile phone, a smartphone terminal, a tablet terminal, a personal computer, or the like is used. For example, a SIP signal can be considered as a signal type to be processed in the present embodiment. In that case, the signal control apparatus 1 becomes a call processing server that controls the SIP signal.

  Next, the operation of the communication system will be described. FIG. 4 is a reference diagram for explaining the processing operation of the communication system according to the present embodiment. Here, an example of processing operation for switching the operation system of the communication system from the signal control device 1a to the signal control device 1b will be described. The signal control device 1a includes one interface and is assigned an IP address “XX.X.X”. The signal control device 1b also includes one interface # 1 and is assigned an IP address of “YYYYY”. Furthermore, the signal control device 1b does not hold a record during communication of the user terminal 7a performed by the signal control device 1a. When the terminal accommodation destination is simply switched without system switching processing (for example, when the signal control devices 1a and 1b are both active and only a part of the plurality of terminals changes the accommodation destination) However, basically the same processing operation is possible.

  First, in step S101, the signal control device management device 5 reads out the subscriber information of the user terminals 7a and 7b accommodated in the signal control device 1a from the subscriber information storage unit 51 based on the operation of the administrator. It transmits to the control apparatus 1b. Here, subscriber information is arbitrary information related to a user who is a subscriber. For example, it is a subscriber user name, an address, a telephone number, etc., and attribution information is also included.

  Next, in step S102, the signal control device 1b acquires attribution information from the input subscriber information, additionally registers it in its attribution information, and acquires an IP address from the added attribution information. Then, an unassigned interface # 2 is secured from a plurality of interfaces connected to the network device 3 in the own apparatus, and the acquired IP address is assigned to the new interface # 2. Here, the IP address “XX.X” of the signal control device 1a is assigned to the interface # 2.

  Next, in step S103, the signal control device 1a reads the resource information relating to the accommodated user terminals 7a and 7b from the resource information storage unit 11a and transfers it to the signal control device 1b. Thereafter, the transferred resource information is stored in the resource information storage unit 16b of the signal control device 1b as migration source resource information. Here, the resource information is arbitrary information necessary for communication. For example, the ID of the user terminal that performed communication, a telephone number, an address, a call history, a communication history, and the like, including recorded information during communication. In particular, the communication record includes a signal type such as INVITE, a reception time, a sequence number, and the like.

  Next, in step S104, the signal control apparatus management apparatus 5 transmits a system switching signal for changing to the non-operational system to the signal control apparatus 1a, and also sends a system switching signal for changing to the operating system to the signal control apparatus. Send to 1b. Thereby, the signal control processing in the communication system is started in the signal control device 1b. When the terminal accommodation destination is simply switched as described above, both the signal control devices 1a and 1b are active (or only the signal control device 1a is non-operational), so that the user terminal accommodation destination is used instead of the system switching signal. Is transmitted to each of the signal control devices 1a and 1b. The signal may include the ID of the target user terminal.

  Next, in step S105, the signal control device 1b transmits to the network device 3 a command for updating the cache data in the ARP table. For example, the ARP table of the network device 3 is updated by transmitting a Gratuitous ARP packet defined by RFC5227 (https://tools.ietf.org/html/rfc5227).

  Here, since the IP address “XX.X.X” of the signal control device 1a is assigned to the interface # 2 of the signal control device 1b in step S102, the network device 3 sends the signal to the IP address to the interface. Will be sent to # 2. As a result, the signals from the user terminals 7a and 7b can be transmitted to the new accommodation destination without changing the IP address of the connection destination from “XX.X.X” to “Y.Y.Y.Y”. It is transmitted to the control device 1b.

  Thereafter, in step S106, when the signal control device 1b receives a continuation signal such as Re-INVITE from the communicating user terminal 7a, the signal control device 1b reads the migration source resource information from the resource information storage unit 16b, and obtains the migration source resource information. Use to continue a call or signal during communication. Since the resource information of the communication signal in the user terminal 7a is held, disconnection of communication can be prevented at the time of system switching. The signal flow before and after system switching is shown in FIG.

  As described above, according to the present embodiment, the signal control device 1a processes the signal transmitted from the accommodated user terminal 7a, and transfers resource information for controlling communication of the signal to the signal control device 1b. On the other hand, when the signal control device 1b receives the resource information transferred from the signal control device 1a and transmits a continuation signal during communication from the user terminal 7a, the signal control device 1b performs processing using the transferred resource information. Thereby, disconnection of communication at the time of changing the accommodation of the user terminal to the signal control device can be prevented.

[Second Embodiment]
Next, a second embodiment will be described. The network configuration of the communication system according to the second embodiment is the same as that of the first embodiment shown in FIG.

  FIG. 6 is a diagram showing a functional block configuration of the signal control device 1a and the signal control device 1b according to the present embodiment.

  The signal control device 1a includes a signal processing unit 21a that processes signals from the user terminals 7a and 7b, and information on the processed signals, in addition to the functional units denoted by reference numerals 11a to 14a described in the first embodiment. Resource information storage unit 22a that stores resource information, resource information transmission unit 23a that transmits the resource information stored in its own device to the signal control device management device 5, and reception during system switching (generally synonymous with accommodation destination switching) And a signal transmission unit 24a that transmits the processed signal to the signal control device 1b that is the system switching destination.

  The signal control device 1b includes, in addition to the functional units denoted by reference numerals 11b to 18b described in the first embodiment, a resource information reception unit 21b that receives resource information transferred from the signal control device management device 5, and a reception Resource information storage unit 22b for storing the resource information recorded and the resource information recorded by the own device, a signal processing unit 23b for processing a signal using the resource information, and a virtual signal having the same function as the signal control device 1a And a virtual signal control device generation unit 24b that generates the control device 1a ′.

  FIG. 7 is a diagram showing a functional block configuration of the signal control device management device 5 according to the present embodiment. The signal control device management device 5 includes a resource information receiving unit 61 that receives resource information from the signal control device 1a, in addition to the function units denoted by reference numerals 51 to 54 described in the first embodiment, and the resource information And a resource information transfer unit 62 for transferring the information to the signal control device 1b.

  Next, the operation of the communication system will be described. 8 to 12 are reference diagrams for explaining the processing operation of the communication system according to the present embodiment. Here, an example of processing operation for switching the operation system of the communication system from the signal control device 1a to the signal control device 1b will be described.

(State 1: When a new signal is received before transferring resource information)
First, the operation in the case of the state 1 will be described. In step S201, when the signal processing unit 21a of the signal control device 1a receives a new signal from the accommodated user terminal 7a, the signal processing unit 21a stores the resource information related to the signal (including recording during communication) in the resource information storage unit 22a. Then, it is looped back within its own device and transferred to the destination user terminal 7d. As a result, an incoming / outgoing communication call is established between both terminals.

(Status 2: Resource information is registered at the migration destination and before system switchover)
Next, the operation in the case of the state 2 will be described. In the case of the state 2, the incoming and outgoing communication calls are established via the two signal control devices 1a and 1b. First, in step S <b> 202, the resource information transmission unit 23 a of the signal control device 1 a transmits resource information related to a new signal based on a request from the signal control device management device 5. At this time, the signal control apparatus 1a manages the state of the own apparatus as a “terminal input / relay output” state indicating that a signal is received from the user terminal but relayed and output.

  Thereafter, the signal control device management device 5 transfers the resource information acquired from the signal control device 1a to the signal control device 1b. Then, the resource information receiving unit 21b of the signal control device 1b stores the resource information transferred from the signal control device management device 5 in the resource information storage unit 22b as the migration source resource information. At this time, the signal control device 1b manages the state of the own device as a “relay on” state indicating that the relayed signal is input.

  Subsequently, when a continuation signal is transmitted from the user terminal 7a to the signal control device 1a in step S203, the signal processing unit 21a of the signal control device 1a receives the continuation signal and confirms the state of the own device. Here, since the own apparatus is in the “terminal relaying / exiting” state, the signal transmission unit 24a transmits the received continuation signal to the signal control apparatus 1b. Thereafter, the signal processing unit 23b of the signal control device 1b receives the continuation signal and transmits it to the destination user terminal 7d. In addition, the said process of the signal control apparatus 1b before system switching is a normal process. That is, before system switching, the migration destination resource information held in the signal control device 1b is referred to, and it is determined that a normal signal is transmitted from the signal control device 1a. A state in which signals from other devices are being processed is referred to as a “relay on” state.

(State 3: During system switching, after system switching)
Next, the operation in the case of the state 3 will be described. In the case of the state 2, the incoming / outgoing communication call is established via the two signal control devices 1a and 1b. However, when the processing system is switched, the signal from the user terminal 7a is transmitted to the active signal control apparatus 1b, and therefore the non-operational signal control apparatus 1a cannot be used. Therefore, the same function as that of the signal control device 1a is provided inside the active signal control device 1b to establish a communication call on the signal control device 1b.

  First, in step S204, the virtual signal control device generation unit 24b of the signal control device 1b generates a virtual signal control device 1a 'having the same function as the signal control device 1a from the source resource information in its own device. Since the function of the signal control device is common to each signal control device, the virtual signal control device 1a 'is generated with reference to the function of its own signal control device 1b. Further, the signal control device 1b secures the interface # 2 to which no address is assigned, assigns the IP address of the signal control device 1a, and uses the interface # 2 for the virtual signal control device 1a '. The IP address of the signal control device 1a is input from the signal control device management device 5 as in the first embodiment.

  Next, in step S <b> 205, the signal control device 1 b transmits a command for updating the cache data in the ARP table to the network device 3. Since the IP address of the signal control device 1a is assigned to the interface # 2 of the virtual signal control device 1a ', the network device 3 transmits a signal to the IP address to the interface # 2.

  Subsequently, when a continuation signal is transmitted from the user terminal 7a in step S206, the network device 3 transmits the continuation signal to the interface # 2 of the signal control device 1b and receives it by the virtual signal control device 1a '. The virtual signal control device 1a 'transfers the continuation signal to the signal control device 1b via the network device 3 because the virtual signal control device 1a' is in the "terminal incoming / outgoing / out" state in the same manner as the signal control device 1a. Thereafter, the signal processing unit 23b of the signal control device 1b receives the continuation signal and transmits it to the destination user terminal 7d.

(State 4: When disconnected)
Next, the operation in the case of the state 4 will be described. First, in step S207, when a disconnection signal is transmitted from the user terminal 7d, which is an incoming call terminal for a communication call, since the connection destination IP address is “YYYY”, the interface of the signal control apparatus 1b. Sent to # 1.

  Next, in step S208, the signal processing unit 23b of the signal control device 1b transmits a disconnection signal to the virtual signal control device 1a 'via the network device 3 because the state of the own device is the "relay on" state. Thereafter, in step S209, the virtual signal control device 1a 'receives the disconnection signal through the interface # 2, and transmits the disconnection signal to the user terminal 7a that is the originating terminal.

(State 5: When a new call is received after the call is over)
Finally, the operation in the case of the state 5 will be described. This operation is the same as in state 1 above. That is, in step S210, when the signal processing unit 23b of the signal control device 1b receives a new signal from the accommodated user terminal 7d, the signal processing unit 23b stores the resource information regarding the signal in the resource information storage unit 22b, It is returned and transmitted to the user terminal 7a as the destination. As a result, an incoming / outgoing communication call is established between both terminals.

  As described above, according to the present embodiment, the signal control device 1a processes the signal transmitted from the accommodated user terminal 7a, transfers resource information for controlling communication of the signal to the signal control device 1b, When a continuation signal during communication is transmitted from the user terminal 7a, it is transmitted to the signal control device 1b. On the other hand, the signal control device 1b receives the resource information transferred from the signal control device 1a, and when the continuation signal during communication is transmitted, performs processing using the transferred resource information. Thereby, disconnection of communication at the time of changing the accommodation of the user terminal to the signal control device can be prevented.

  Further, according to the present embodiment, the signal control device 1b generates a virtual signal control device 1a ′ having the same function as the signal control device 1a in the own device, and the virtual signal control device 1a ′ When the continuation signal during communication is transmitted from, the signal is transmitted to the signal processing unit 23b of the signal control device 1b, so that it is possible to prevent disconnection of communication when the user terminal is accommodated in the signal control device.

  Note that the signal control devices 1a and 1b described in the present embodiment can be applied to a communication system having a duplex or ACT-SBY configuration configured to increase reliability. It is also possible to construct the signal control devices 1a and 1b as programs, install them on a computer and execute them, or distribute them via a communication network.

DESCRIPTION OF SYMBOLS 1a ... Signal control apparatus 11a, 22a ... Resource information storage part 12a, 21a ... Signal processing part 13a ... Resource information transfer part 14a ... System switching execution part 23a ... Resource information transmission part 24a ... Signal transmission part 1b ... Signal control apparatus 11b ... Attribution relationship information storage unit 12b ... Subscriber information registration unit 13b ... IP address assignment unit 14b ... Destination change command unit 15b, 21b ... Resource information reception unit 16b, 22b ... Resource information storage unit 17b, 23b ... Signal processing unit 18b ... System switching execution unit 24b ... Virtual signal control device generation unit 1a '... Virtual signal control device 3 ... Network device 5 ... Signal control device management device 51 ... Subscriber information storage unit 52 ... Subscriber information setting unit 53 ... System switching unit 54 ... GUI part 61 ... Resource information receiving part 62 ... Resource information transfer part 7a-7d ... User terminal S101 S106, S201~S210 ... step

Claims (6)

In a communication system comprising a first signal control device and a second signal control device and controlling a signal transmitted from a user terminal via a network device,
The first signal control device includes:
Processing means for processing a signal transmitted from the user terminal being accommodated;
Transfer means for transferring resource information for controlling communication of the signal to the second signal control device;
The second signal control device includes:
Receiving means for receiving address information of the first signal control device from a management device;
An allocating means for allocating the address information to an unallocated interface connected to the network device;
Receiving means for receiving resource information transferred from the first signal control device;
Command means for instructing the network device to transmit a signal to the address information to the interface;
When a continuation signal during communication is transmitted from the user terminal via the interface, processing means for processing using the transferred resource information;
A communication system comprising: In a communication system comprising a first signal control device and a second signal control device and controlling a signal transmitted from a user terminal via a network device,
The first signal control device includes:
Processing means for processing a signal transmitted from the user terminal being accommodated;
Transfer means for transferring resource information for controlling communication of the signal to the second signal control device;
A transmission means for transmitting to the second signal control device when a continuation signal during communication is transmitted from the user terminal;
The second signal control device includes:
Receiving means for receiving resource information transferred from the first signal control device;
When receiving the continuation signal during communication, processing means for processing using the transferred resource information;
A communication system comprising: The second signal control device includes:
Receiving means for receiving address information of the first signal control device from a management device;
An allocating means for allocating the address information to an unallocated interface connected to the network device;
Generating means for generating a virtual signal control device having the same function as the first signal control device in its own device and assigning the interface;
Command means for instructing the network device to send a signal to the address information to the interface;
The virtual signal control device includes:
The communication system according to claim 2, wherein when a continuation signal during communication is transmitted from the user terminal via the interface, the communication is transmitted to the second signal control device. In a communication method comprising a first signal control device and a second signal control device, and controlling a signal transmitted from a user terminal via a network device,
The first signal control device includes:
Processing steps for processing signals transmitted from the user terminal being accommodated;
A transfer step of transferring resource information for controlling communication of the signal to the second signal control device;
The second signal control device includes:
A receiving step of receiving address information of the first signal control device from a management device;
An assigning step of assigning the address information to an unassigned interface connected to the network device;
A receiving step of receiving resource information transferred from the first signal control device;
An instruction step for instructing the network device to transmit a signal to the address information to the interface;
When a continuation signal during communication is transmitted from the user terminal via the interface, a processing step of processing using the transferred resource information;
A communication method characterized by comprising: In a communication method comprising a first signal control device and a second signal control device, and controlling a signal transmitted from a user terminal via a network device,
The first signal control device includes:
A processing step of processing a signal transmitted from the user terminal being accommodated by the processing means;
A transfer step of transferring resource information for communication control of the signal to the second signal control device by a transfer means;
A transmission step of transmitting to the second signal control device when a continuation signal during communication is transmitted from the user terminal by the transmission means;
The second signal control device includes:
A receiving step of receiving resource information transferred from the first signal control device by a receiving means;
A processing step of processing using the transferred resource information when the continuation signal during communication is received by the processing means;
A communication method characterized by comprising: The second signal control device includes:
A receiving step of receiving address information of the first signal control device from the management device by a receiving means;
An allocating step of allocating the address information to an unallocated interface connected to the network device by an allocating unit;
A generating step of generating a virtual signal control device having the same function as the first signal control device in the own device by the generating means and assigning the interface;
An instruction step for instructing the network device to send a signal to the address information to the interface by an instruction means; and
The virtual signal control device includes:
6. The communication method according to claim 5, wherein when a continuation signal during communication is transmitted from the user terminal via the interface, the signal is transmitted to the second signal control device.

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