JP3972024B2 - Communication control system, communication terminal device, and gatekeeper device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to TTC standard JT-H323 or ITU-T recommendation H.264. The present invention relates to incoming call transfer control when an incoming call to a certain terminal is in a state where connection cannot be established in a multimedia communication system based on H.323.
[0002]
[Prior art]
Conventionally, TTC standard H.323 or ITU-T recommendation H.323. Non-Patent Document 1 and Non-Patent Document 2 disclose the incoming call transfer method in the multimedia communication system based on H.323.
[0003]
FIG. 12 is a system diagram showing an example of the configuration of a conventional multimedia communication system. As shown in FIG. 12, the multimedia communication system 10 includes a gatekeeper device 11 and endpoint devices 12 to 14 (in the example of FIG. 12), and each is connected to a LAN. The gatekeeper device 11 performs call control between the endpoint devices, and also performs registration of the endpoint devices, management of the addresses of the endpoint devices, management of bandwidth for performing communication, and permission control when starting communication. Do. The endpoint devices 12-14 are H.264. A terminal corresponding to the multimedia communication system according to H.323, such as an IP telephone, a personal computer, and a gateway.
[0004]
Next, an incoming call transfer operation in the conventional multimedia communication system 10 will be described with reference to FIG. 12, FIG. 13 and FIG. 13 and 14 are sequence diagrams for explaining the operation of the conventional multimedia communication system. FIG. 13 is a sequence diagram when a call cannot be received due to a telephone call or the like, and FIG. 14 is a sequence diagram when a call is temporarily received such as not responding to an incoming call. In FIG. 13 and FIG. 14, the operation of the endpoint device is indicated by the step E symbol, and the operation of the gatekeeper device is indicated by the step G symbol.
[0005]
The operation when the endpoint device 12 makes a call to the endpoint device 13 and is transferred to another endpoint device because the terminating endpoint device 13 cannot receive a call due to a telephone call or the like will be described. The calling endpoint device 12 includes its own alias address (telephone number and the like) and the alias address of the called endpoint device 13. A 323 participation request (ARQ) message is transmitted to the gatekeeper device 11 (step E1). The gatekeeper device 11 reads out the IP address based on the received alias address of the terminating endpoint device 13, and includes the H.264 containing the IP address of the terminating endpoint device 13. A participation confirmation (ACF) message 323 is transmitted to the calling endpoint device 12 (step G2). Next, the calling endpoint device 12 receives the H.264 message. A call setup (SETUP) message 323 is transmitted to the terminating endpoint device 13 (step E3).
[0006]
The incoming endpoint device 13 reads the reason display value indicating the reason when the incoming call cannot be made, and determines the incoming call transfer destination (in this case, the incoming call transfer destination endpoint device 14) according to the reason display value managed by itself. . The incoming endpoint device 13 is in a state where the incoming call cannot be received, a reason display value indicating the reason, and an alias address of the incoming call transfer destination endpoint device 14. A facility (FACILITY) message of 323 is transmitted to the calling endpoint device 12 (step E4). The calling endpoint device 12 includes the content indicating that the message has been received. A facility (FACILITY) message of 323 is transmitted to the terminating endpoint device 13 (step E5). Next, the calling endpoint device 12 terminates the connection with the terminating endpoint device 13, so The release completion (REL_COMP) of H.323 is transmitted to the terminating endpoint device 13 (step E6). Further, the calling endpoint device 12 is connected to the H.264. A 323 leave request (DRQ) message is transmitted to the gatekeeper device 11 (step E7). The gatekeeper device 11 is H.264. A disconnection confirmation (DCF) message 323 is transmitted to the calling endpoint device 12 (step G8).
[0007]
Next, the calling endpoint device 12 includes its own alias address and the alias address of the call forwarding destination endpoint device 14 in order to newly call the call forwarding destination endpoint device 14 notified from the called endpoint device 13. H. A 323 participation request (ARQ) message is transmitted to the gatekeeper device 11 (step E9). The gatekeeper device 11 reads the IP address based on the received alias address of the call transfer destination endpoint device 14 and includes the IP address of the call transfer destination endpoint device 14. A participation confirmation (ACF) message 323 is transmitted to the calling endpoint device 12 (step G10). Next, the calling endpoint device 12 receives the H.264 message. A call setup (SETUP) message 323 is transmitted to the call transfer destination endpoint device 14 (step E11).
[0008]
The call transfer destination endpoint device 14 is connected to the H.264. 323 call setup acceptance (CALL PROC) message is transmitted to the calling endpoint device 12 (step E12), and the H.323 including its own alias address is transmitted. A 323 participation request (ARQ) message is transmitted to the gatekeeper device 11 (step E13). The gatekeeper device 11 is H.264. A participation confirmation (ACF) message 323 is transmitted to the call transfer destination endpoint device 14 (step G14). The call transfer destination endpoint device 14 is connected to the H.264. A 323 call (ALERT) message is transmitted to the calling endpoint device 12 (step E15). At this point, the incoming call transfer destination endpoint device 14 enters the incoming state. When a response operation is performed for an incoming call, the incoming call transfer destination endpoint device 14 A response (CONN) message of 323 is transmitted to the calling endpoint device 12 (step E16). Thus, the calling endpoint device 12 and the incoming call transfer destination endpoint device 14 are in a call state (step E17).
[0009]
Next, when the endpoint device 12 makes a call to the endpoint device 13, the incoming endpoint device 13 receives an incoming call once, but there is no response for a predetermined time, so that the operation is transferred to another endpoint device. Will be explained. The calling endpoint device 12 includes the H.264 including its own alias address and the alias address of the called endpoint device 13. A 323 participation request (ARQ) message is transmitted to the gatekeeper device 11 (step E21). The gatekeeper device 11 reads out the IP address based on the received alias address of the terminating endpoint device 13, and includes the H.264 containing the IP address of the terminating endpoint device 13. A participation confirmation (ACF) message 323 is transmitted to the calling endpoint device 12 (step G22). Next, the calling endpoint device 12 receives the H.264 message. A call setup (SETUP) message 323 is transmitted to the terminating endpoint device 13 (step E23).
[0010]
The terminating endpoint device 13 is an H.264. A 323 call setting acceptance (CALL PROC) message is transmitted to the calling endpoint device 12 (step E24). In addition, the terminating endpoint device 13 includes the H.264 containing its own alias address. A 323 participation request (ARQ) message is transmitted to the gatekeeper device 11 (step E25). The gatekeeper device 11 is H.264. A participation confirmation (ACF) message 323 is transmitted to the terminating endpoint device 13 (step G26). The terminating endpoint device 13 is an H.264. A 323 call (ALERT) message is transmitted to the calling endpoint device 12 (step E27). At this point, the incoming endpoint device 13 enters an incoming state.
[0011]
If no response operation is performed for a predetermined time in the incoming endpoint device 13 in the incoming state, the incoming endpoint device 13 reads a reason display value indicating no response for a predetermined time, and an incoming call forwarding destination corresponding to the reason display value managed by itself. (In this case, the call transfer destination endpoint device 14) is determined. The incoming endpoint device 13 is in a state where it cannot be connected, a reason display value indicating the reason, and an alias address of the incoming call transfer destination endpoint device 14. A facility (FACILITY) message of 323 is transmitted to the calling endpoint device 12 (step E28). The calling endpoint device 12 includes the content indicating that the message has been received. A facility (FACILITY) message of 323 is transmitted to the terminating endpoint device 13 (step E29).
[0012]
Next, the calling endpoint device 12 includes its own alias address and the alias address of the call forwarding destination endpoint device 14 in order to newly call the call forwarding destination endpoint device 14 notified from the called endpoint device 13. H. A 323 participation request (ARQ) message is transmitted to the gatekeeper device 11 (step E30). The gatekeeper device 11 reads the IP address based on the received alias address of the call transfer destination endpoint device 14 and includes the IP address of the call transfer destination endpoint device 14. A participation confirmation (ACF) message 323 is transmitted to the calling endpoint device 12 (step G31). Next, the calling endpoint device 12 receives the H.264 message. A call setup (SETUP) message 323 is transmitted to the call transfer destination endpoint device 14 (step E32).
[0013]
The call transfer destination endpoint device 14 is connected to the H.264. 323 sends a call setup acceptance (CALL PROC) message to the calling endpoint device 12 (step E33), and the H.323 including its own alias address is transmitted. A 323 participation request (ARQ) message is transmitted to the gatekeeper device 11 (step E34). The gatekeeper device 11 is H.264. A participation confirmation (ACF) message 323 is transmitted to the call transfer destination endpoint device 14 (step G35). The call transfer destination endpoint device 14 is connected to the H.264. A 323 call (ALERT) message is transmitted to the calling endpoint device 12 (step E36). At this point, the incoming call transfer destination endpoint device 14 enters the incoming state.
[0014]
The calling endpoint device 12 terminates the connection with the terminating endpoint device 13, so 323 release complete (REL_COMP) message is transmitted to the terminating endpoint device 13 (step E37). A 323 leave request (DRQ) message is transmitted to the gatekeeper device 11 (step E38). The gatekeeper device 11 is H.264. A disconnection confirmation (DCF) message 323 is transmitted to the calling endpoint device 12 (step G39). The terminating endpoint device 13 is an H.264. A 323 leave request (DRQ) message is transmitted to the gatekeeper device 11 (step E40). The gatekeeper device 11 is H.264. A disconnection confirmation (DCF) message 323 is transmitted to the terminating endpoint device 13 (step G41).
[0015]
When a response operation to the incoming call is performed in the incoming call transfer destination endpoint device 14, the incoming call transfer destination endpoint device 14 A response (CONN) message of 323 is transmitted to the calling endpoint device 12 (step E42). Thus, the calling endpoint device 12 and the incoming call transfer destination endpoint device 14 are in a call state (step E43).
[0016]
As described above, in the incoming call transfer control in the conventional multimedia communication system 10, the incoming endpoint device manages itself when transferring without receiving an incoming call and when transferring without receiving and responding once. The call transfer destination is determined, the call transfer destination is notified to the calling endpoint device together with the reason display value, and the calling endpoint device generates a call to the call transfer destination endpoint device and connects It is a method to do.
[0017]
[Non-Patent Document 1]
JT-H450.3
Additional call forwarding service for JT-H323
Telegraph and Telephone Technical Committee
[Non-Patent Document 2]
INTERNATIONAL TELECOMMUNICATION UNION
TERECOMMUNICATION STANDARDIZATION SECTOR OF ITU
Call diversion supplementary services for H.323
ITU-T Recommendation H.450.3
[0018]
[Problems to be solved by the invention]
However, in the incoming call transfer control of the conventional multimedia communication system, since a new call is generated between the calling endpoint device and the incoming call transfer destination endpoint device, the newly generated call is received by the gatekeeper device. It is unknown whether the call is a forwarding call, and the call forwarding source cannot be recognized anywhere. Accordingly, in a gatekeeper device that performs telephony services such as call restriction by number, billing, number addition or deletion, the telephony service for the call forwarding source that should be originally performed cannot be performed, and the telephony service is performed for the caller There is.
[0019]
The present invention has been made in view of the above points, and is based on TTC standard JT-H323 or ITU-T recommendation H.264. In the multimedia communication system based on H.323, when a call transfer operation is performed, a communication control system and a communication terminal capable of performing telephony services such as call restriction by number, charging, number addition or deletion to a call transfer source An object is to provide a device and a gatekeeper device.
[0020]
[Means for Solving the Problems]
The present invention relates to a communication system comprising a calling device, a receiving device that receives an incoming call from the calling device, and a gatekeeper device that performs address management for connecting the calling device and the receiving device. The gatekeeper device includes transfer destination notifying means for notifying the calling device of a transfer destination according to a connection impossible state in the receiving device in response to a participation request from the calling device, and the calling device includes: Transfer destination receiving means for receiving a transfer destination corresponding to the connection impossible state from the gatekeeper device, a response indicating that the connection cannot be made from the receiving device, a response receiving means for receiving the connection impossible state, the received connection impossible state and the reception Transfer destination determining means for determining a call transfer destination from the transfer destination, and call transfer when making a participation request to the gatekeeper device to connect to the call transfer destination. And the source notifying means for notifying the gatekeeper device that it and call transfer source is the said called device, a communication control system comprising a.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
A first aspect of the present invention includes a calling device, a receiving device that receives an incoming call from the calling device, and a gatekeeper device that performs address management for connecting the calling device and the receiving device. In the communication system, the gatekeeper device includes transfer destination notifying means for notifying the calling device of a transfer destination according to a connection impossible state in the receiving device in response to a participation request from the calling device, A call destination device receives a transfer destination according to the connection impossible state from the gatekeeper device, a transfer destination reception unit, a response that the connection cannot be made from the call receiving device, a response reception unit that receives the connection impossible state, and the received connection A transfer destination determining means for determining an incoming call transfer destination from the disabled state and the received transfer destination; and a request to join the gatekeeper device to connect to the incoming call transfer destination And the source notifying means for notifying the gatekeeper device that it and call transfer source is a signal transfer is the called device, a communication control system comprising a.
[0022]
According to the present invention, since the calling device determines the transfer destination and notifies the gatekeeper device that the incoming call is transferred and that the incoming call transfer source is the incoming device, the gatekeeper device recognizes the incoming transfer source and sends the call. Telephony services such as restriction processing, billing processing, number addition or deletion processing, etc. can be performed on the call forwarding source.
[0023]
According to a second aspect of the present invention, there is provided a communication control system in which the gatekeeper device includes processing means for performing outgoing call restriction processing, billing processing, number addition or deletion processing on the received incoming call transfer source incoming device. .
[0024]
According to the present invention, the incoming call transfer source incoming device received by the gatekeeper device is subjected to outgoing call restriction processing, billing processing, or number addition or deletion processing. Telephony service for the transfer source can be performed.
[0025]
According to a third aspect of the present invention, there is provided a communication control system in which the connection impossible state is managed so as to distinguish at least one of a time over due to no response to an incoming call and a wireless terminal device being out of service. is there.
[0026]
According to the present invention, the incoming device is in a state where the connection is impossible, and the reason is that the telephone is in the middle of a call. Since any one of them is managed, it is possible to set the call transfer destination separately for the reason of the connection impossible state.
[0027]
According to a fourth aspect of the present invention, there is provided a communication control system in which the gatekeeper device has a transfer number counting means for counting the number of times of transfer, and the transfer number is limited.
[0028]
According to the present invention, since the number of transfers is limited, it is possible to prevent problems such as incoming calls being transferred one after another and not converging.
[0029]
According to a fifth aspect of the present invention, there is provided a communication control system comprising notification means for notifying the calling device of the address of the incoming device that is the first transfer source when the gatekeeper device restricts the number of transfers. It is.
[0030]
According to the present invention, when the number of transfers reaches the limit number, the connection operation is performed again with respect to the incoming call device that is the first transfer source, so that an operation suitable for the purpose of the caller can be performed.
[0031]
According to a sixth aspect of the present invention, there is provided a communication control system in which the calling device has a transfer number counting means for counting the number of times of transfer, and the transfer number is limited.
[0032]
According to the present invention, since the number of transfers is limited, it is possible to prevent problems such as incoming calls being transferred one after another and not converging.
[0033]
According to a seventh aspect of the present invention, there is provided a transfer destination receiving means for receiving each transfer destination in accordance with a connection impossible state in the receiving device from a gatekeeper device that performs address management, a response indicating that the connection cannot be made from the receiving device, and connection thereof A response receiving means for receiving an unacceptable state, a transfer destination determining means for determining an incoming call forwarding destination from the received unusable state and the received forwarding destination, and a request to join the gatekeeper device to connect to the incoming forwarding destination A transfer source notifying means for notifying the gatekeeper device that the incoming call transfer is performed and the incoming call transfer source is the incoming device.
[0034]
According to the present invention, when a calling device determines an incoming call transfer destination corresponding to a connection impossible state from among respective transfer destinations according to a connection impossible state, and performs a call transfer when making a participation request to connect to the transfer destination. In order to notify the gatekeeper device of the incoming call transfer source, the gatekeeper device recognizes the incoming call transfer, and performs telephony services such as outgoing call restriction processing, billing processing, number addition or deletion processing to the incoming call transfer source. Can do.
[0035]
According to an eighth aspect of the present invention, there is provided an incoming call transfer destination storage unit for storing incoming call transfer destination information set in advance corresponding to a connection impossible state at an incoming time of a communication terminal. Receiving means for receiving a participation request for connection; Indicates the next connection destination associated with the receiving device when the calling device cannot connect to the receiving device Retrieve the call forwarding information from the call forwarding storage unit In response to the participation request, the calling device And a transfer destination notifying unit for notifying.
[0036]
According to the present invention, since the gatekeeper device notifies the calling device of the incoming transfer destination information of the receiving device, the calling device can not connect even if the receiving device does not instruct the transfer destination, and the connection cannot be made. The call transfer destination information can be determined by searching the call transfer destination information from the state.
[0037]
According to a ninth aspect of the present invention, there is provided a gatekeeper device comprising a call restriction means for receiving a call transfer from the calling device and receiving a notification of the call transfer source to perform a call restriction process on the call transfer source.
[0038]
According to the present invention, since the notification of the incoming call transfer source is received and the outgoing call restriction process is performed at the time of incoming call transfer, outgoing call restriction can be applied based on the outgoing call restriction setting of the incoming call transfer source.
[0039]
According to a tenth aspect of the present invention, there is provided a gatekeeper device comprising charging means for performing a charging process on the incoming call transfer source upon receiving notification of the incoming call transfer source from the calling device.
[0040]
According to the present invention, since a call transfer process is performed by receiving a notification of a call transfer source during call transfer, it is possible to charge the call transfer source.
[0041]
According to an eleventh aspect of the present invention, there is provided a gatekeeper comprising number addition / deletion means for receiving a call transfer from the calling device and receiving or notifying the call transfer source and adding or deleting a number to the call transfer source. Device.
[0042]
According to the present invention, since a call transfer source notification is received at the time of incoming call forwarding and number addition or deletion processing is performed, it is possible to provide a number addition or deletion service based on the information of the incoming call transfer source.
[0043]
A twelfth aspect of the present invention includes a calling device, a receiving device that receives an incoming call from the calling device, and a gatekeeper device that performs address management for connecting the calling device and the receiving device. In the communication system, the gatekeeper device includes a transfer destination notification step of notifying the calling device of a transfer destination according to a connection impossible state in the receiving device in response to a participation request from the calling device, A call receiving device receives a transfer destination from the gatekeeper device according to a transfer destination corresponding to the connection impossible state, a response that the connection cannot be made from the call receiving device, a response reception step that receives the connection impossible state, and the received connection A transfer destination determination step for determining a call transfer destination from the disabled state and the received transfer destination; and a gatekeeper device for connecting to the call transfer destination. A transfer source notification step of notifying the gatekeeper device that it and call transfer source is a call forwarding is the incoming call device when performing the pressurization request is a communication control method comprising.
[0044]
According to the present invention, since the calling device determines the transfer destination and notifies the gatekeeper device that the incoming call is transferred and that the incoming call transfer source is the incoming device, the gatekeeper device recognizes the incoming transfer source and sends the call. Telephony services such as restriction processing, billing processing, number addition or deletion processing, etc. can be performed on the call forwarding source.
[0045]
According to a thirteenth aspect of the present invention, there is provided a transfer destination receiving step for receiving each transfer destination in accordance with a connection impossible state in the receiving device from a gatekeeper device that performs address management, a response indicating that the connection cannot be made from the receiving device, and connection thereof A response receiving step for receiving a disabled state; a transfer destination determining step for determining a call transfer destination from the received connection disabled state and the received transfer destination; and a request to join the gatekeeper device to connect to the call transfer destination And a transfer source notifying step of notifying the gatekeeper device that the call transfer is an incoming call transfer and the incoming call transfer source is the incoming call device.
[0046]
According to the present invention, when a calling device determines an incoming call transfer destination corresponding to a connection impossible state from among respective transfer destinations according to a connection impossible state, and performs a call transfer when making a participation request to connect to the transfer destination. In order to notify the gatekeeper device of the incoming call transfer source, the gatekeeper device recognizes the incoming call transfer, and performs telephony services such as outgoing call restriction processing, billing processing, number addition or deletion processing to the incoming call transfer source. Can do.
[0047]
A fourteenth aspect of the present invention is a transfer destination storing step for storing transfer destination information set in advance corresponding to a connection impossible state at the time of an incoming call of a communication terminal, and for connecting from a calling device which is a communication terminal A receiving step of receiving a participation request, and the transfer destination information stored in the transfer destination storing step Indicates the next connection destination associated with the receiving device when the calling device cannot connect to the receiving device Take out the forwarding information In response to the participation request, the calling device A forwarding destination notification step for notification; When a participation request for connecting to the receiving device of the transfer destination information is received from the calling device And a processing step of performing a call restriction process, a billing process, or a number addition or deletion process on the call transfer source upon receiving a call transfer notification from the calling device. This is a control method of the gatekeeper device.
[0048]
According to the present invention, since the gatekeeper device notifies the calling device of the incoming transfer destination information of the receiving device, the calling device can not connect even if the receiving device does not instruct the transfer destination, and the connection cannot be made. The call transfer destination information can be determined by searching the call transfer destination information from the state. In addition, since the notification of the incoming call transfer source is received at the time of incoming call transfer and the outgoing call restriction process, billing process, or number addition or deletion process is performed, the telephony service can be provided to the incoming call transfer source.
[0049]
The gist of the present invention is that the gatekeeper device responds to the participation request from the calling device and notifies the calling device of the transfer destination according to the connection impossible state in the receiving device, and the calling device cannot connect from the receiving device. In response to the reason, the call transfer destination is determined, and when a participation request is made to connect to the call transfer destination, the call transfer is made and the gatekeeper device is notified that the call transfer source is the call receiving device.
[0050]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0051]
FIG. 1 is a system diagram showing an example of a configuration of a communication control system according to an embodiment of the present invention.
[0052]
The communication control system 100 includes a gatekeeper device 101 and communication terminal devices 102 to 106 (in the case of the example in FIG. 1), and each is connected to a LAN. In addition to the so-called gatekeeper function such as management of the address of each communication terminal device, management of bandwidth for performing communication, and control of permission when communication is started, the gatekeeper device 101 receives the call transfer destination of each communication terminal device. Telephony service processing such as management and transmission restriction processing or billing processing or number addition or deletion processing. The communication terminal devices 102 to 106 are H.264. 323 is a communication system terminal such as an IP telephone, a personal computer, and a gateway.
[0053]
The communication terminal device 102 is a calling device that makes a call to the communication terminal device 103, and the alias address is “200”. The communication terminal device 103 is a receiving device that is called from the calling device 102 and receives an incoming call, and its alias address is “201”. The communication terminal device 104 is a call transfer destination device that receives call transfer when the call receiving device 103 is busy (busy), and its alias address is “202”. The communication terminal device 105 is a call transfer destination device that receives call transfer when the call receiving device 103 cannot respond to an incoming call, and its alias address is “203”. The communication terminal apparatus 106 is an incoming call transfer destination apparatus that receives an incoming call transfer when the wireless terminal cannot be connected because the wireless terminal is out of service area when the incoming call apparatus 103 is a base station, and its alias address is “204”. When these incoming calls are transferred, the incoming call device 103 becomes the incoming call transfer source.
[0054]
FIG. 2 is a block diagram showing the configuration of the gatekeeper device according to one embodiment of the present invention.
[0055]
The gatekeeper device 101 includes a CPU 201, a TCP / IP control unit 202, a call connection control transmission / reception unit 203, an IP address storage unit 204, an incoming call transfer destination storage unit 205, an incoming call transfer destination notification unit 206, a telephony service processing unit 207, and a transfer number counter. 208 is provided.
[0056]
The CPU 201 is a CPU that performs internal control of the gatekeeper device 101. The TCP / IP control unit 202 is an interface for performing IP communication on the LAN. The call connection control transmission / reception unit 203 receives an H.264 request such as a participation request (ARQ) from a communication terminal device. 323 message is received and transmitted to each part, and the H.264 such as participation confirmation (ACF) is received. Transmission / reception related to call connection control is performed, such as editing and transmitting 323 messages from information of each unit. FIG. 3 is a diagram for explaining an example of the contents of the IP address storage unit of the gatekeeper device according to the present embodiment. As shown in FIG. 3, the IP address storage unit 204 stores an alias address (telephone number or the like) of a communication terminal device and an IP address in association with each other. FIG. 4 is a diagram for explaining an example of the contents of the incoming call transfer destination storage unit of the gatekeeper device according to the present embodiment. As shown in FIG. 4, the incoming call transfer destination storage unit 205 stores an alias address of a transfer destination corresponding to the incoming call transfer type for each alias address of the communication terminal device. This incoming call transfer type is classified according to the connection impossible state. The incoming call transfer destination notification unit 206 reads out the incoming call transfer destination information of the incoming call device from the incoming call transfer destination storage unit 205 and notifies the call connection control transmission / reception unit 203 of it.
[0057]
The telephony service processing unit 207 performs processing of telephony services such as transmission restriction by number, charging, and number addition or deletion, and includes a transmission restriction unit 2071, a charging unit 2072, and a number addition deletion unit 2073. . The outgoing call restriction unit 2071 performs a process of restricting outgoing calls based on the setting of the caller or the incoming call transfer source. The billing unit 2072 performs billing processing on the caller or the incoming call transfer source. The number addition / deletion unit 2073 performs a process of adding or deleting a preset number to the number dialed by the caller or the call forwarding source. The transfer count counter 208 counts the number of incoming calls in order to set a limit so that incoming calls are not transferred one after another for one call.
[0058]
FIG. 5 is a block diagram showing a configuration of a communication terminal apparatus according to an embodiment of the present invention.
[0059]
The communication terminal apparatus 102 includes a CPU 501, a TCP / IP control unit 502, a transfer destination reception unit 503, a connection impossible state response reception unit 504, a transfer destination determination unit 505, an incoming call transfer source notification unit 506, and a transfer count reception unit 507. Yes.
[0060]
The CPU 501 is a CPU that performs internal control of the communication terminal device 102. The TCP / IP control unit 502 is an interface for performing IP communication on the LAN. FIG. 6 is a diagram for explaining an example of the contents of the transfer destination receiving unit of the communication terminal apparatus according to the present embodiment. As shown in FIG. 6, the transfer destination receiving unit 503 receives and stores an incoming call transfer destination alias address corresponding to the incoming call transfer type of the called device transmitted from the gatekeeper device 101 as incoming call transfer destination information. The connection impossible state response receiving unit 504 receives and stores a connection failure response transmitted from the receiving device and a reason display value indicating the connection impossible state. The forwarding destination determination unit 505 searches for the forwarding destination alias address corresponding to the incoming call forwarding type of the receiving device received by the forwarding destination reception unit 503 based on the reason display value of the connection impossible state received by the connection impossible state response reception unit 504. To determine the call forwarding destination.
[0061]
The incoming call transfer source notification unit 506 indicates that the participation request (ARQ) message for starting connection to the incoming call transfer destination determined by the transfer destination determination unit 505 is incoming transfer and the alias of the incoming call device that is the incoming call transfer source. The address is placed and notified to the gatekeeper device 101. The transfer count receiving unit 507 receives and stores the transfer count sent from the gatekeeper device 101 in the participation confirmation (ACF) message, and stores the connection request (ARQ) when connecting to the incoming call transfer destination. It is put on a message and transmitted to the gatekeeper device 101.
[0062]
Next, operations of the communication control system 100, the gatekeeper device 101, and the communication terminal device 102 according to an embodiment of the present invention will be described with reference to FIGS. 7, 8 and 9 are sequence diagrams for explaining the operation of the communication control system according to the present embodiment. FIG. 7 is a sequence diagram in the case where the receiving device cannot receive a call during a call. FIG. 8 is a sequence diagram when the incoming device receives an incoming call but does not respond within a predetermined time. FIG. 9 is a sequence diagram when the receiving device is a base station of the wireless device and the wireless terminal device cannot be connected because it is out of service area. FIG. 10 is a flowchart for explaining the operation of the gatekeeper device according to the present embodiment. FIG. 11 is a flowchart for explaining the operation of the communication terminal apparatus according to the present embodiment. 7, 8, 9, 10, and 11, the operation of the communication terminal apparatus is indicated by a reference sign of Step E, and the operation of the gatekeeper apparatus is indicated by a reference sign of Step G.
[0063]
As shown in FIG. 7, the communication terminal device 102 becomes a calling device and makes a call to the communication terminal device 103, and the communication terminal device 103, which is a receiving device, does not receive a call during a call and the incoming call is transferred. explain.
[0064]
The calling device 102 includes an H.264 including its own alias address (telephone number or the like) “200” and the alias address “201” of the receiving device 103. A participation request (ARQ) message 323 is transmitted to the gatekeeper 101 (step E701 in FIG. 7). In the gatekeeper device 101, the call connection control transmission / reception unit 203 receives a participation request (ARQ) message via the TCP / IP control unit 202. The call connection control transmission / reception unit 203 determines whether or not there is incoming call transfer information in the participation request (ARQ) message (step G1001 in FIG. 10). At this time, since it is not an incoming call transfer yet, the process proceeds to step G1002. In step G1002, the incoming call transfer destination notifying unit 206 determines whether the incoming device has an incoming call transfer destination based on the alias address “201” of the incoming device received by the call connection control transmission / reception unit 203. Search and determine. As shown in FIG. 4, since there is an incoming call transfer destination, the incoming call transfer destination information of the incoming call device is read and notified to the call connection control transmission / reception unit 203 (step G1003).
[0065]
The call connection control transmission / reception unit 203 is notified of the IP address “192.168.1.3” read from the IP address storage unit 204 based on the alias address “201” of the receiving device and the incoming call transfer destination notification unit 206. The incoming call transfer destination information of the incoming call device, the initial value “0” of the transfer count, and the alias address “201” of the incoming call device that is the first incoming call transfer source are edited into the participation confirmation (ACF) message (step G1004). . If it is determined in step G1002 that there is no incoming call transfer destination, the process advances to step G1005. In step G1005, the call connection control transmission / reception unit 203 uses only the IP address “192.168.1.3” read from the IP address storage unit 204 based on the alias address “201” of the receiving device to confirm the participation (ACF) message. Edit to Next, in step G1006, the telephony service processing unit 207 performs a telephony service such as a call restriction unit, billing, and number addition / deletion to the caller. That is, the outgoing call restriction unit 2071 performs outgoing call restriction based on the outgoing call restriction setting of the calling device 102. In addition, billing unit 2072 performs billing processing on calling device 102. Further, the number addition / deletion unit 2073 adds or deletes a number based on the number addition / deletion setting of the calling device 102.
[0066]
The gatekeeper device 101 performs the above-described operation, and includes the H.264 address including the IP address “192.168.1.3” of the receiving device 103 and each transfer destination according to the connection impossible state of the receiving device 103. A participation confirmation (ACF) message 323 is transmitted to the calling device 102 (step G702 in FIG. 7). The calling device 102 receives the participation confirmation (ACF) message via the TCP / IP control unit 502, and the transfer destination receiving unit 503 receives and stores the transfer destination information. At the same time, the transfer number receiving unit receives the transfer number. The incoming call forwarding source notification unit 506 receives and saves the first incoming call forwarding source (step E1101 in FIG. 11). The calling device 102 transmits a call setup (SETUP) message to the receiving device 103 (step E703 in FIG. 7 and step E1102 in FIG. 11). At this point, the calling device 102 waits for message reception (step E1103 in FIG. 11).
[0067]
In step E704 of FIG. 7, since the receiving device 103 cannot receive a call during a telephone call, the receiving device 103 cannot connect and includes an H.264 message containing a reason display value “busy” indicating the state. A release complete (REL_COMP) message 323 is transmitted to the calling device 102. Upon receiving the message, the calling device 102 determines the message content and waits until a response (CONN) message or a release completion (REL_COMP) message is received (steps E1104 and E1105 in FIG. 11). If the message is received and it is determined in step E1106 that the message is a response (CONN) message, the process proceeds to step E1107 to make a call. If it is not a response (CONN) message in step E1106, it is a release completion (REL_COMP) message, and the process proceeds to step E1108. In this case, since the calling device 102 receives the release completion (REL_COMP) message transmitted from the receiving device 103 (step E704 in FIG. 7), in step E1108, the reason display value “busy” in the connection impossible state is connected. It is stored in the impossible state response receiving unit 504.
[0068]
In order to terminate the connection with the receiving device 103, the calling device 102 receives the H.264 call. 323 is sent to the gatekeeper device 101 (step E705 in FIG. 7). A disconnection confirmation (DCF) message 323 is received (step G706 in FIG. 7 and step E1109 in FIG. 11). Next, the transfer destination determination unit 505 of the calling device 102 uses the transfer destination information stored in the transfer destination reception unit 503 based on the reason display value “busy” stored in the connection impossible state response reception unit 504. The incoming call transfer type “busy” is determined by searching, and the corresponding transfer destination alias address “202” is read (step E1110 in FIG. 11). In step E1111, the CPU 501 determines whether or not an incoming call transfer destination has been determined. If not, the CPU 501 proceeds to step E1112 and fails in calling. When the incoming call forwarding destination is determined, the process proceeds to step E1113.
[0069]
In step E1113, the incoming call transfer source notification unit 506 determines that the transfer destination alias address “202” determined by the transfer destination determination unit 505, its own alias address “200”, the incoming call transfer, and the incoming call transfer source Join request (ARQ) for connecting the alias address “201”, the transfer count “0” stored in the transfer count receiving unit 507, and the stored alias address “201” of the first incoming call transfer source to the transfer destination Edit to message. The calling device 102 performs the above-described operation, and the H.264 including the incoming call transfer and the alias address of the incoming call transfer source. A participation request (ARQ) message 323 is transmitted to the gatekeeper 101 (step E707 in FIG. 7).
[0070]
When the gatekeeper device 101 receives the participation request (ARQ) message, the operation starts again from step G1001 in FIG. In step G1001, the call connection control transmission / reception unit 203 determines whether or not there is call transfer information in the received participation request (ARQ) message. In this case, there is call transfer information, and the process advances to step G1007. In step G1007, the transfer count counter 208 adds 1 to the transfer count “0” received by the participation request (ARQ) message to make the transfer count “1”. In step G1008, the CPU 201 determines whether or not the transfer count is a transfer limit threshold value. In this case, it is determined that the threshold value has not been reached, and the process proceeds to step G1009. In step G1009, the incoming call transfer destination notification unit 206 searches the incoming call transfer destination storage unit 205 based on the incoming call transfer destination alias address “202” received by the call connection control transmission / reception unit 203, and receives the incoming call transfer destination alias address. Further call destination information of the communication terminal device 104 that is “202” is read out and notified to the call connection control transmitting / receiving unit 203.
[0071]
The call connection control transmission / reception unit 203 receives the IP address “192.168.1.4” read from the IP address storage unit 204 based on the alias address “202” of the incoming call transfer destination, and further incoming call transfer of the communication terminal device 104. The destination information, the added transfer count “1”, and the alias address “201” of the communication terminal apparatus 103 which is the first incoming call transfer source are edited into a participation confirmation (ACF) message (step G1011 in FIG. 10). Next, in step G1012, the telephony service processing unit 207, based on the incoming call transfer source alias address “201” received by the call connection control transmission / reception unit 203 in the participation request (ARQ) message, Execute telephony services such as addition and deletion to the call forwarding source. That is, the outgoing call restriction unit 2071 performs outgoing call restriction based on the outgoing call restriction setting of the communication terminal device 103 that is the incoming call transfer source. The accounting unit 2072 performs accounting processing for the communication terminal apparatus 103 that is the call transfer source. Further, the number addition / deletion unit 2073 adds or deletes a number based on the setting of number addition / deletion of the communication terminal device 103 that is the call transfer source.
[0072]
The gatekeeper device 101 performs the above operation and includes the IP address “192.168.1.4” of the communication terminal device 104 as the incoming call transfer destination and each transfer destination according to the connection impossible state of the communication terminal device 104. H. A participation confirmation (ACF) message 323 is transmitted to the calling device 102 (step G708 in FIG. 7). When receiving the participation confirmation (ACF) message, the calling device 102 starts again from step E1101 in FIG. Explanation of similar operations is omitted. The calling device 102 is connected to the H.264. A call setup (SETUP) message 323 is transmitted to the communication terminal device 104 that is the call forwarding destination (step E709 in FIG. 7 and step E1102 in FIG. 11). The communication terminal device 104 is an H.264 communication device. A call setting acceptance (CALL PROC) message 323 is transmitted to the calling device 102 (step E710 in FIG. 7). In addition, the communication terminal device 104 is connected to the calling device 102 in order to connect to the calling device 102. A 323 participation request (ARQ) message is transmitted to the gatekeeper 101 (step E711). The gatekeeper device 101 is an H.264 device. A 323 participation confirmation (ACF) message is transmitted to communication terminal apparatus 104 (step G712).
[0073]
Next, the communication terminal device 104 is connected to the H.264 terminal. A 323 call (ALERT) message is transmitted to the calling device 102 (step E713). At this point, the communication terminal device 104 enters an incoming state. When a response operation is performed at the communication terminal device 104, the communication terminal device 104 A response (CONN) message 323 is transmitted to the calling device 102 (step E714). In this way, the communication terminal device 102 as the calling device and the communication terminal device 104 as the incoming call transfer destination form a communication path on the network, respectively, so that they can communicate with each other (step E715).
[0074]
Here, the operation when the incoming call transfer is repeatedly performed for one call and the restriction is applied will be described with reference to the flowchart shown in FIG. In step G1008, the gatekeeper 101 determines that the CPU 201 has reached the threshold value and proceeds to step G1010. In step G1010, the call connection control transmission / reception unit 203 replaces the alias address of the first incoming call transfer source received by the participation request (ARQ) message in place of the incoming call alias address to be received by this incoming call transfer. In step G1005, the call connection control transmission / reception unit 203 reads the IP address from the IP address storage unit 204 based on the alias address of the first incoming call transfer source that has been read, and edits it into a participation confirmation (ACF) message. In step G1006, after performing the telephony service for the caller, the H.H. A participation confirmation (ACF) message 323 is transmitted to the calling device 102. As a result, the calling device 102 enters the connection operation again with respect to the communication terminal device 103 which is the first incoming call transfer source.
[0075]
Next, as shown in FIG. 8, the communication terminal device 102 becomes a calling device and makes a call to the communication terminal device 103, and the communication terminal device 103, which is a receiving device, once arrives but cannot respond, An operation in which incoming call transfer is performed when a predetermined time is over will be described.
[0076]
Steps E801 to E803 are the same as steps E701 to E703 in FIG. In step E804, the receiving apparatus 103 determines that the H.264 has been received. A call setup acceptance (CALL PROC) message 323 is transmitted to the calling device 102. Also, in order to connect to the calling device 102, H.264 is connected. A participation request (ARQ) message 323 is transmitted to the gatekeeper 101 (step E805). The gatekeeper device 101 is an H.264 device. A participation confirmation (ACF) message 323 is transmitted to the receiving device 103 (step G806). Next, the receiving device 103 receives the H.264 message. A 323 call (ALERT) message is transmitted to the calling device 102 (step E807). At this point, the receiving device 103 enters an incoming state.
[0077]
When the incoming device 103 enters an incoming state, the timer is started and if a response operation is not performed for a predetermined time, the time is over and it is determined that the connection is impossible. In step E808, since the incoming call device 103 cannot connect without a response, the incoming call device 103 includes an H.264 message indicating that the connection is impossible and a reason display value “no response” indicating the state. A release complete (REL_COMP) message 323 is transmitted to the calling device 102. In addition, the receiving device 103 terminates the connection with H.264. A 323 leave request (DRQ) message is transmitted to the gatekeeper 101 (step E809). The gatekeeper device 101 is an H.264 device. A disconnection confirmation (DCF) message 323 is transmitted to the receiving device 103 (step G810).
[0078]
The calling device 102 receives the release completion (REL_COMP) message transmitted from the receiving device 103, and stores the connection failure state reason display value “no response” in the connection failure state response reception unit 504 (step in FIG. 11). E1108). In order to terminate the connection with the receiving device 103, the calling device 102 receives the H.264 call. 323 detachment request (DRQ) message is transmitted to the gatekeeper device 101 (step E811 in FIG. 8). A disconnection confirmation (DCF) message 323 is received (step G812 in FIG. 8 and step E1109 in FIG. 11). Next, the transfer destination determination unit 505 of the calling device 102 transfers the transfer destination information of the called device 103 stored in the transfer destination reception unit 503 based on the reason display value “no response” stored in the connection impossible state response reception unit 504. And the incoming call forwarding type “no response” is determined, and the corresponding forwarding destination alias address “203” is read (step E1110 in FIG. 11).
[0079]
In step E1113, the incoming call transfer source notification unit 506 determines that the transfer destination alias address “203” determined by the transfer destination determination unit 505, its own alias address “200”, the incoming call transfer, and the incoming call transfer source Join request (ARQ) for connecting the alias address “201”, the transfer count “0” stored in the transfer count receiving unit 507, and the stored alias address “201” of the first incoming call transfer source to the transfer destination Edit to message. The calling device 102 performs the above-described operation, and the H.264 including the incoming call transfer and the alias address of the incoming call transfer source. A participation request (ARQ) message 323 is transmitted to the gatekeeper 101 (step E813 in FIG. 8). Upon receiving the participation request (ARQ) message, the gatekeeper device 101 performs the processing of steps G1001, G1007, G1008, G1009, G1011, and G1012 of FIG. 10 to obtain the IP address “192. 168.1.5 "and each transfer destination according to the connection disabled state of the communication terminal device 105. A participation confirmation (ACF) message 323 is transmitted to the calling device 102 (step G814 in FIG. 8). Since step E815 to step E821 are the same as step E709 to step E715 in FIG.
[0080]
Next, as shown in FIG. 9, the communication terminal device 102 becomes a calling device and calls the communication terminal device 103, and the communication terminal device 103 that becomes the receiving device is a wireless base station and the wireless terminal device is out of service area. A description will be given of an operation in which incoming call transfer is performed because a connection cannot be made because of the connection.
[0081]
Steps E901 to E903 are the same as steps E701 to E703 in FIG. In step E904, the receiving apparatus 103 determines that the H.264 has been received. A call setup acceptance (CALL PROC) message 323 is transmitted to the calling device 102. Thereafter, the incoming call device 103 attempts wireless communication with the wireless terminal device in order to call the wireless terminal device, but the connection fails because the wireless terminal device is out of the service area. In step E905, since the wireless terminal device cannot be connected outside the service area, the receiving apparatus 103 cannot connect and includes the reason display value “out of service” indicating the state. A release complete (REL_COMP) message 323 is transmitted to the calling device 102.
[0082]
The calling device 102 receives the release completion (REL_COMP) message transmitted from the receiving device 103, and stores the connection failure state reason display value “out of service area” in the connection failure state response reception unit 504 (step E1108 in FIG. 11). ). In order to terminate the connection with the receiving device 103, the calling device 102 receives the H.264 call. 323 is sent to the gatekeeper device 101 (step E906 in FIG. 9). A disconnection confirmation (DCF) message 323 is received (step G907 in FIG. 9 and step E1109 in FIG. 11). Next, the transfer destination determination unit 505 of the calling device 102 uses the transfer destination information stored in the transfer destination reception unit 503 based on the reason display value “out of service” stored in the connection impossible state response reception unit 504. The incoming call forwarding type “out of service area” is searched and the corresponding forwarding destination alias address “204” is read (step E1110 in FIG. 11).
[0083]
In step E1113, the incoming call transfer source notification unit 506 determines that the transfer destination alias address “204” determined by the transfer destination determination unit 505, its own alias address “200”, the incoming call transfer, and the incoming call transfer source Join request (ARQ) for connecting the alias address “201”, the transfer count “0” stored in the transfer count receiving unit 507, and the stored alias address “201” of the first incoming call transfer source to the transfer destination Edit to message. The calling device 102 performs the above-described operation, and the H.264 including the incoming call transfer and the alias address of the incoming call transfer source. A participation request (ARQ) message 323 is transmitted to the gatekeeper 101 (step E908 in FIG. 9). Upon receiving the participation request (ARQ) message, the gatekeeper device 101 performs the processing of steps G1001, G1007, G1008, G1009, G1011, and G1012 of FIG. 10 to obtain the IP address “192. 168.1.6 "and each transfer destination according to the connection impossible state of the communication terminal device 106. A participation confirmation (ACF) message 323 is transmitted to the calling device 102 (step G909 in FIG. 9). Since step E910 to step E916 are the same as step E709 to step E715 in FIG.
[0084]
Thus, according to this embodiment, the gatekeeper device responds to the participation request (ARQ) message from the calling device, and notifies the calling device of each transfer destination according to the connection impossible state in the receiving device. Therefore, the calling device can determine the incoming call transfer destination by receiving the response indicating that the connection cannot be made from the incoming device and the reason display value of the connection impossible state, and searching for the transfer destination received from the gatekeeper device. In addition, the call keeper device recognizes the call transfer source in order to notify the gate keeper device of the call transfer source and the call transfer source in the participation request (ARQ) message for connecting the call transfer device to the call transfer destination. Thus, telephony service processing such as outgoing call restriction processing, billing processing, number addition or deletion processing can be performed on the incoming call forwarding source. Furthermore, the connection-disabled state of the receiving device is managed by distinguishing between a call, a time over due to no response to an incoming call, and the wireless terminal device being out of service area, so the incoming call forwarding destination should be a separate communication terminal device. Can do.
[0085]
In addition, according to the present embodiment, the number of transfers can be limited by counting the number of transfers by the gatekeeper device so that incoming transfer is not repeated for one call. Further, by setting the incoming call transfer destination in the case of restriction as the first incoming call transfer source, the connection operation can be performed again for the communication terminal device that has been called first. In the present embodiment, the gatekeeper device counts and limits the number of transfers. However, a configuration may be adopted in which a transfer number counter is provided in the communication terminal device that makes a call to count and limit the number of transfers.
[0086]
【The invention's effect】
As described above, according to the present invention, TTC standard JT-H323 or ITU-T recommendation H.323. In a multimedia communication system based on H.323, a communication control system capable of performing telephony services such as outgoing call control by number, billing, number addition or deletion to an incoming call transfer source when an incoming call transfer operation is performed is provided. be able to.
[Brief description of the drawings]
FIG. 1 is a system diagram showing an example of a configuration of a communication control system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a gatekeeper device according to an embodiment of the present invention.
FIG. 3 is a diagram for explaining an example of contents of an IP address storage unit of the gatekeeper device according to the present embodiment;
FIG. 4 is a diagram for explaining an example of the contents of an incoming call transfer destination storage unit of the gatekeeper device according to the present embodiment;
FIG. 5 is a block diagram showing a configuration of a communication terminal apparatus according to an embodiment of the present invention.
FIG. 6 is a diagram for explaining an example of the contents of a transfer destination receiving unit of the communication terminal apparatus according to the present embodiment;
FIG. 7 is a sequence diagram for explaining the operation of the communication control system according to the present embodiment;
FIG. 8 is a sequence diagram for explaining the operation of the communication control system according to the present embodiment;
FIG. 9 is a sequence diagram for explaining the operation of the communication control system according to the present embodiment;
FIG. 10 is a flowchart for explaining the operation of the gatekeeper device according to the present embodiment;
FIG. 11 is a flowchart for explaining the operation of the communication terminal apparatus according to the present embodiment;
FIG. 12 is a system diagram showing an example of the configuration of a conventional multimedia communication system.
FIG. 13 is a sequence diagram for explaining the operation of a conventional multimedia communication system.
FIG. 14 is a sequence diagram for explaining the operation of a conventional multimedia communication system.
[Explanation of symbols]
100 Communication control system
101 Gatekeeper device
102, 103, 104, 105, 106 Communication terminal device
201 CPU
202 TCP / IP control unit
203 Call connection control transceiver
204 IP address storage unit
205 Call forwarding destination storage unit
206 Call forwarding notification section
207 Telephony Service Processing Department
208 Transfer counter
2071 Calling Control Department
2072 Billing Department
2073 Number addition / deletion section
501 CPU
502 TCP / IP control unit
503 Transfer destination receiver
504 Connection impossible state response receiver
505 Transfer decision unit
506 Call forwarding notification section
507 Transfer count receiver
10 Multimedia communication system
11 Gatekeeper device
12, 13, 14 Endpoint device

Claims (14)

  In a communication system comprising: a calling device; a receiving device that receives an incoming call from the calling device; and a gatekeeper device that performs address management for connecting the calling device and the receiving device, the gatekeeper device includes: A transfer destination notifying unit for notifying the calling device of a transfer destination according to a connection impossible state in the receiving device in response to a participation request from the calling device, wherein the calling device is in a connection impossible state. A transfer destination receiving unit that receives a transfer destination according to the request from the gatekeeper device, a response that the connection cannot be made from the receiving device and a response receiving unit that receives the connection disabled state, the received connection disabled state, and the received transfer destination A transfer destination determination means for determining a call transfer destination from the call forwarding device, and a call transfer when making a participation request to the gatekeeper device to connect to the call transfer destination; A communication control system signal transfer source, characterized in that it comprises a transfer source notifying means for notifying the gatekeeper device that is the called device.   The communication control system according to claim 1, wherein the gatekeeper device includes processing means for performing outgoing call restriction processing, billing processing, number addition or deletion processing on the received incoming call forwarding device.   3. The connection impossible state is managed so as to distinguish at least one of a time-out due to no response to an incoming call during a telephone call and a wireless terminal device being out of service area. The communication control system described.   The communication control system according to any one of claims 1 to 3, wherein the gatekeeper device includes transfer number counting means for counting the number of times of transfer, and limits the number of transfer times.   5. The communication control according to claim 4, wherein the gatekeeper device comprises a notification means for notifying the calling device of the address of the incoming device that is the first transfer source when the number of transfers is limited. system. The communication control system according to any one of claims 1 to 3, wherein the calling device includes a transfer number counting unit that counts the number of times of transfer, and limits the number of transfers.   Transfer destination receiving means for receiving each transfer destination corresponding to the connection impossible state in the receiving device from the gatekeeper device that performs address management, a response that the connection cannot be made from the receiving device, and a response receiving means for receiving the connection impossible state Transfer destination determination means for determining a call transfer destination from the received connection disabled state and the received transfer destination; and call transfer when a participation request is made to the gatekeeper device to connect to the call transfer destination; A communication terminal device comprising: transfer source notification means for notifying the gatekeeper device that an incoming call transfer source is the incoming call device. It has a call transfer destination storage unit for storing call transfer destination information set in advance corresponding to a connection impossible state at the time of communication terminal reception, and receives a participation request for connection from a calling device as a communication terminal In response to the participation request by extracting from the incoming call forwarding destination storage unit the incoming call forwarding destination information indicating the next connection destination associated with the receiving device when the calling device cannot connect to the incoming device. And a transfer destination notification means for notifying the calling device.   9. The gatekeeper device according to claim 8, further comprising a call restriction unit that performs call restriction processing on the call transfer source in response to a call transfer from the call device and a notification of the call transfer source.   10. The gatekeeper according to claim 8, further comprising a billing unit configured to perform billing processing on the incoming call transfer source upon receiving notification of the incoming call transfer from the calling device and the incoming call transfer source. apparatus.   9. The apparatus according to claim 8, further comprising number addition / deletion means for receiving a notification of the incoming call transfer from the calling device and receiving or notifying the incoming call transfer source and adding or deleting a number to the incoming call transfer source. Item 11. The gatekeeper device according to any one of Items 10.   In a communication system comprising a calling device, a receiving device that receives an incoming call from the calling device, and a gatekeeper device that performs address management for connecting the calling device and the receiving device, the gatekeeper device includes: A transfer destination notifying step of notifying the calling device of a transfer destination according to a connection impossible state in the receiving device in response to a participation request from the calling device, wherein the calling device is in a connection impossible state. A transfer destination receiving step for receiving a transfer destination according to the request from the gatekeeper device, a response reception step for receiving a response indicating that the connection cannot be established from the receiving device and a connection disabled state, the received connection disabled state, and the received transfer destination. A transfer destination determination step for determining a call transfer destination from the network, and a call transfer request when making a join request to the gatekeeper device to connect to the call transfer destination. A communication control method that and call transfer source is characterized in that the and a transfer source notification step of notifying the gatekeeper device that is the called device.   A transfer destination receiving step for receiving each transfer destination corresponding to a connection impossible state in the receiving device from a gatekeeper device that performs address management; a response that the connection cannot be made from the receiving device; and a response receiving step that receives the connection impossible state; A transfer destination determination step for determining a call transfer destination from the received connection disabled state and the received transfer destination; and a call transfer when a participation request is made to the gatekeeper device to connect to the call transfer destination; A method of controlling a communication terminal device, comprising: a transfer source notification step of notifying the gatekeeper device that an incoming call transfer source is the incoming call device. A transfer destination storing step for storing transfer destination information set in advance corresponding to a connection impossible state at the time of an incoming call of a communication terminal; a receiving step for receiving a participation request for connection from a calling device as a communication terminal; When the calling device cannot connect to the receiving device from the transfer destination information stored in the transfer destination storing step, transfer destination information indicating a next connection destination associated with the receiving device is extracted and the participation is performed. A transfer destination notification step for notifying the calling device in response to the request; and a transfer request from the calling device when receiving a participation request for connecting to the receiving device of the transfer destination information from the calling device. And a processing step of receiving a notification from the incoming call transfer source and performing a call restriction process, a billing process, or a number addition or deletion process on the incoming call transfer source. Method of controlling the over path apparatus.

Images