JP5614248B2 - Transmission / reception control device and control method thereof - Google Patents

Description

  The present invention relates to a network communication control device for controlling communication between a communication unit (first communication means) that communicates with a communication terminal such as an IP facsimile machine (hereinafter also referred to as “IP-FAX”) and a next-generation network. The present invention relates to a transmission / reception control device for controlling transmission / reception of data to / from each communication unit, and a control method therefor.

Currently, NGN (Next Generation Network) is being developed as a next generation public network (next generation network). NGN (hereinafter also referred to as “NGN network”) is a public network in which an IP (Internet Protocol) network and a public telephone network are all integrated.
In recent years, for example, IP-FAX has been required to be communicably connected to an NGN network (hereinafter also simply referred to as “connection”). However, when IP-FAX performs transmission (IP-FAX transmission) using the NGN network, ITU-T (International Telecommunication Union) recommendation T.264. Transmission is not possible without a method for communicating only data for 38 (hereinafter also simply referred to as “T.38”) (hereinafter also simply referred to as “T.38 data”). The reason is as follows.

  Conventional IP-FAX uses voice data and T.264 for users using a VoIP (Voice over Internet Protocol) gateway (GateWay). Both 38 data were communicated. However, in NGN, when voice data is communicated, T.P. Since the fee is higher than when only 38 data communication is performed, the IP-FAX transmission using NGN gathers at each communication-related company, and the T.38. Arrangements were made to communicate only 38 data. The VoIP gateway is a device that converts data (information) sent from the IP network and sends it to the public telephone network, and can also send data sent from the public telephone network to the IP network. Is possible.

  On the other hand, even if the apparatus is connected to a carrier network that presupposes only the use of voice communication, Patent Document 1 is suitable for a carrier server to which the own apparatus is connected in order to perform image data communication. An apparatus is disclosed in which an SDP (Session Description Protocol) header format is stored in a storage unit, and an SDP header of a request message to be transmitted is described according to the SDP header format in the storage unit.

However, in the NGN network, T.A. When only 38 data communication is possible, for example, a conventional IP-FAX that does not support NGN as described in Patent Document 1 cannot be connected to the NGN network in a communicable manner.
The present invention has been made in view of the above points, and even a communication terminal (such as an IP-FAX) that does not support a next-generation network that integrates a plurality of different networks such as an NGN network can be connected to the next-generation network. The purpose is to be able to.

In order to achieve the above object, the present invention provides the following transmission / reception control apparatus and control method therefor.
The transmission / reception control apparatus according to the present invention includes a first communication unit that communicates with a communication terminal, and a second communication unit that communicates with a network communication control apparatus that controls communication with a next-generation network. A transmission / reception control apparatus for controlling transmission / reception of data using the second communication means, characterized in that it is as shown in any one of the following (1) to (6) .

(1) When a session establishment request is received from the communication terminal, request discrimination means for discriminating the content of the session establishment request, and as a result of the discrimination, the session establishment request transmits voice data to the destination The first session connection means for establishing the voice communication session with the communication terminal, and thereby the voice communication session is established. After the voice communication is established and terminated, voice data discarding means for discarding the voice data, and after the voice data is discarded by the voice data discarding means, 38 for transmitting data for communication. 38 issues a session establishment request for requesting establishment of a session for communication to the network communication control apparatus, and the T.38 communication with the network communication control apparatus. 38. After the voice data is discarded by the second session connection means for establishing a session for communication and the voice data discarding means, the T.38 communication session is established. A session establishment request for requesting establishment of a session for communication is issued to the communication terminal, and the T.38 communication with the communication terminal is performed. 38, a third session connection means for establishing a session for communication, thereby 38 when a session for communication is established, the T.38 sent from the communication terminal. 38 by the data receiving means for receiving data for communication and the second session connection means. 38 communication session is established, and the data receiving means receives the T.38 communication session. And 38 data transmission means for transmitting the data to the network communication control device when data for communication is received.
Then, the second communication means is a means for storing information in which a telephone number and an IP address are associated with each other using SIP, and means for communicating with a SIP server for controlling communication based on the information, Storage means for storing the telephone number and IP address of the communication terminal, and storage in the storage means when receiving the telephone number and IP address of the communication terminal notified from the communication terminal by the data receiving means Updating means for updating the telephone number or IP address that has been updated as necessary, and notifying means for notifying the SIP server of the updated telephone number and IP address.

(2) In the transmission / reception control device according to (1), when data sent from the network communication control device is received by the data receiving means, a reception source that determines that data has been received from the network communication control device A determination unit is provided, and when the data transmission unit determines that the data is received from the network communication control device by the reception source determination unit , the received data is transmitted to the communication terminal as it is.

(3) In the transmission / reception control device according to (1) or (2) , when receiving the identification information of the other party whose reception is notified from the communication terminal by the data receiving means, registration means for registering the identification information And a confirmation means for confirming identification information of the data transmission source when receiving a session establishment request for requesting establishment of a session for transmitting data from the network communication control device by the data receiving means, and And a reception refusal means for refusing to receive data from the network communication control device when the identification information of the transmission source confirmed by the above matches the identification information registered by the registration means.

(4) In the transmission / reception control device according to (1) or (2) , when receiving the identification information of the other party whose transmission is notified from the communication terminal by the data receiving means, the registration means for registering the identification information And a confirmation means for confirming the identification information of the destination of the data when receiving a session establishment request for requesting establishment of a session for transmitting data from the communication terminal by the data receiving means, When the transmission destination identification information matches the identification information registered by the registration means, a transmission prohibiting means for prohibiting data transmission from the communication terminal is provided.

(5) In the transmission / reception control device according to any one of (1) to (4) , as a result of the determination by the request determination unit, the session establishment request is a session for transmitting data other than the audio data toward the destination. A fourth session connection means for establishing a requested session with the communication terminal and with the network communication control device when the establishment is requested, and the data receiving means When a session requested by the fourth session connection means is established and data is received by the data receiving means, the data is transmitted to the network communication control device.

(6) In the transmission / reception control device according to any one of (1) to (5) , recognition means for recognizing a result of data reception by the data reception means and data transmission by the data transmission means, and recognition by the recognition means Storage means for storing the results.

The control method according to the present invention includes a first communication unit that communicates with a communication terminal, and a second communication unit that communicates with a network communication control device that controls communication between a plurality of different networks . The second communication means uses SIP to store information in which a telephone number and an IP address are associated with each other, and also communicates with an SIP server that controls communication based on the information . , Ru control method der in transceiver controller for controlling the transmission and reception of data between the second communication means.
Then, when a session establishment request is received from the communication terminal, a request discrimination step for discriminating the content of the session establishment request, and as a result of the discrimination, the session establishment request is for transmitting voice data toward the destination. A first session connection step for establishing the voice communication session with the communication terminal when the voice communication session is requested to be established, and thereby the voice communication session is established. After the voice communication is completed, the voice data discarding step for discarding the voice data, and after the voice data is discarded by the voice data discarding step, 38 for transmitting data for communication. 38 issues a session establishment request for requesting establishment of a session for communication to the network communication control apparatus, and the T.38 communication with the network communication control apparatus. 38. After the voice data is discarded by the second session connection step of establishing a session for communication 38 and the voice data discarding step, the T.38 communication session is established. A session establishment request for requesting establishment of a session for communication is issued to the communication terminal, and the T.38 communication with the communication terminal is performed. 38, a third session connection step for establishing a session for communication, thereby 38 when a session for communication is established, the T.38 sent from the communication terminal. 38. The data receiving process for receiving data for communication 38 and the second session connection process, the T.38. 38 communication session is established, and the data reception process causes the T.38 communication. 38, when data for communication is received, a data transmission step for transmitting the data to the network communication control device, a storage step for storing the telephone number and IP address of the communication terminal, and the data reception step. An update step of updating the telephone number or IP address stored in the storage step as necessary when receiving the telephone number and IP address of the communication terminal notified from the communication terminal, and the update step A notification step of notifying the SIP server of the updated telephone number and IP address .

  According to the present invention, when the transmission / reception control device receives a session establishment request from the communication terminal, the transmission / reception control device determines the content of the session establishment request, and as a result of the determination, the session establishment request is sent to the voice data toward the destination. When the establishment of a voice communication session for transmitting is requested, the voice communication session is established with the communication terminal, and after the voice communication is completed, the voice data is Discard.

  Thereafter, ITU-T recommendation T.I. 38 for transmitting data for communication. 38 issues a session establishment request for requesting establishment of a session for communication to the network communication control apparatus, and the T.38 communication with the network communication control apparatus. 38, a session for communication is established, and the above-mentioned T.38. A session establishment request for requesting establishment of a session for communication is issued to the communication terminal, and the T.38 communication with the communication terminal is performed. 38 by establishing a session for communication, the T.38 sent from the communication terminal. 38 data for communication is received, and the data is transmitted to the network communication control device.

  According to the present invention, even a communication terminal that is not compatible with a next-generation network in which a plurality of different networks such as an NGN network are integrated can be connected to the next-generation network.

It is the schematic which shows the structural example of the network system containing the transmission / reception control apparatus by this invention. It is a block diagram which shows the example of the transmission / reception control apparatus 10 of FIG. It is explanatory drawing with which it uses for description of the registration process by the transmission / reception control apparatus 10 shown in FIG. FIG. 3 is a diagram illustrating an example of an operation sequence between the transmission / reception control apparatus 10 and the transmission terminal 101 for explaining the behavior of the transmission / reception control apparatus 10 illustrated in FIG. 2 with respect to the transmission terminal 101. It is a figure which shows an example of the operation | movement sequence between the transmission / reception control apparatus 10 and HGW112 for demonstrating the behavior with respect to HGW112 by the transmission / reception control apparatus 10 shown in FIG.

It is a figure which shows an example of the operation | movement sequence at the time of IP-FAX transmission / reception using the NGN network 110 using the transmission / reception control apparatus 10 shown in FIG. It is a figure which shows an example of the operation | movement sequence at the time of IP-FAX reception using the NGN network 110 using the transmission / reception control apparatus 10 shown in FIG. It is a flowchart which shows 1st Example of the communication control by the transmission / reception control apparatus 10 shown in FIG. It is a flowchart which similarly shows 2nd Example of communication control. It is a flowchart which similarly shows 3rd Example of communication control.

It is a flowchart which similarly shows 4th Example of communication control. It is a flowchart which similarly shows 5th Example of communication control. It is the schematic which shows the structural example of the network system for demonstrating the IP-FAX transmission using the conventional IP network. It is the schematic which shows the structural example of the network system for demonstrating the IP-FAX transmission using the conventional NGN network.

Hereinafter, embodiments for carrying out the present invention will be specifically described with reference to the drawings.
The following embodiment is characterized in that the transmission / reception control device has functions as shown in the following (a) to (f).
(A) Function of storing IP address of home gateway (HomeGateWay: HGW) registered by user operation (b) Function of communicating with HGW based on the IP address (c) Data transmitted from IP-FAX (D) A function for receiving (information) (d) A function for transmitting to the HGW by excluding the voice communication portion from the received information (e) IP-FAX transmission in the IP network when viewed from the IP-FAX during the transmission (F) A function that behaves as if it is communicating with an NGN-compatible IP-FAX when viewed from the HGW

Thus, its features will be described in detail. Prior to the description, conventional IP-FAX transmission will be described for the sake of understanding.
FIG. 13 is a schematic diagram showing a configuration example of a network system for explaining IP-FAX transmission using a conventional IP network.
The network system shown in FIG. 13 includes an IP-FAX 101 that does not support NGN, a SIP (Session Initiation Protocol) server 102, and an IP-FAX 103 that does not support NGN. These devices are connected via the IP network 100.

The IP-FAXs 101 and 103 include an image reading unit such as a scanner that reads an image of a document as image data, an image forming unit such as a plotter that prints an image on a print medium such as paper (image formation) based on the image data, And a communication unit that transmits and receives data such as image data via the IP network 100.
The SIP server 102 uses SIP to perform control for storing information in which a telephone number and an IP address are associated with each other, and control communication based on the information (including call control for calling and connecting the other party). Is.
This flow of the IP-FAX transmission utilizing the IP network 100 to definitive the configured network system is as shown in the following (A1) ~ (A6).

(A1) When the IP-FAX 101 operates as a transmission terminal, the IP-FAX 101 accesses the SIP server 102 and tries to establish a voice communication session with a destination (transmission destination).
(A2) The SIP server 102 finds a destination from the telephone number, and IP-FAX 103 (hereinafter referred to as “destination terminal 103”) and IP-FAX 101 (hereinafter referred to as “ transmission terminal 101”) as destination terminals (reception terminals) During the session, a session for voice communication is established.
(A3) The transmission terminal 101 performs voice data communication (voice communication) with the destination terminal 103.
(A4) When the communication of the audio data is completed, the destination terminal 103 determines that the T.P. 38 issues a session establishment request requesting establishment of a session for communication. 38 A session for communication is established.
(A5) The transmission terminal 101 transmits the T.P. 38 data communication is performed with the destination terminal 103.
(A6) T.M. When the 38 data communication is completed, the communication is terminated.

FIG. 14 is a schematic diagram showing a configuration example of a network system for explaining IP-FAX transmission using a conventional NGN network. The same parts (SIP server 102) as in FIG. Yes.
The network system shown in FIG. 14 includes an NGN-compatible IP-FAX 111, an HGW 112, an SIP server 102, an HGW 113, and an NGN-compatible IP-FAX 114. These devices are connected via the NGN network 110.

The IP-FAXs 111 and 114 include an image reading unit such as a scanner that reads an image of a document as image data, an image forming unit such as a plotter that prints an image on a print medium such as paper based on the image data, and an NGN network 110. And a communication unit for transmitting and receiving data such as image data.
The HGWs 112 and 113 are gateway devices (network communication control devices that control communication with the next-generation network) used to connect the IP-FAXs 111 and 114 to the NGN network 110, respectively. Therefore, for example, when the IP-FAX 111 operates as a transmission terminal, the HGW 112 is a device that serves as a window of the NGN network 110 when viewed from the IP-FAX 111.
The flow of IP-FAX transmission using the NGN network 110 in the network system configured as described above is as shown in the following (B1) to (B6).

(B1) When the IP-FAX 111 operates as a transmission terminal, the T.F. 38 A session for communication is established.
(B2) IP-FAX 111 (hereinafter referred to as “ transmission terminal 111”) 38 data communication is performed.
(B3) The HGW 112 accesses the SIP server 102, and the HGW 113 and the T. 38 An attempt is made to establish a session for communication.
(B4) The SIP server 102 finds the destination from the telephone number, and sets the T.P between the HGW 112 on the transmission terminal 111 side and the HGW 113 on the destination side. 38 A session for communication is established.
(B5) The HGW 112 on the transmission terminal 111 side and the HGW 113 on the destination side 38 data communication is performed.
(B6) T.M. When the 38 data communication is completed, the communication is terminated.

Next, the configuration of a network system including a transmission / reception control device according to the present invention will be described.
FIG. 1 is a schematic diagram showing a configuration example of the network system, and the same parts (SIP server 102 and the like ) as those in FIGS. 13 and 14 are denoted by the same reference numerals.
The network system shown in FIG. 1 includes an IP-FAX 101 not compatible with NGN, a transmission / reception control device 10, an HGW 112, an SIP server 102, an HGW 113, and an IP-FAX 114 compatible with NGN. These devices are connected via the NGN network 110.

Next, the configuration of the transmission / reception control device 10 of FIG. 1 will be described.
FIG. 2 is a block diagram illustrating a configuration example of the transmission / reception control apparatus 10.
The transmission / reception control device 10 controls transmission / reception of data. As shown in FIG. 2, for example, a system control unit 11, a system memory 12, a parameter memory 13, a clock circuit 14, an operation display unit 15, T.P. 38 encoding / decoding unit 16, call connection message encoding / decoding unit 17, magnetic disk device 18, and network communication control unit 19.

The system control unit 11 is a central processing unit (CPU) that controls the transmission / reception control device 10 as a whole, and performs control related to the present invention described later.
The system memory 12 is a storage unit that stores a control program executed by the system control unit 11.
The parameter memory 13 is a nonvolatile storage means for storing set parameter information and the like. The parameter information includes an IP address of the HGW 112 described later, an IP address and telephone number of the IP-FAX 101, a communication history, reception refusal terminal information, transmission prohibited terminal information, and the like.

The clock circuit 14 is clock means for generating and outputting the current time.
The operation display unit 15 is used to input operation information and setting information, and to display such information and device status information. Various operation keys such as dial number operation keys and a display such as a liquid crystal display device It has.
T.A. The 38 encoding / decoding unit 16 performs the T.38 encoding / decoding unit. For communication of 38 data, the data is encoded and compressed (encoded) by a predetermined encoding method, and is decoded and expanded (decoded) by a predetermined decoding method.

The call connection message encoding / decoding unit 17 encodes and compresses the call connection message using a predetermined encoding method, and decodes / decompresses the call connection message using a predetermined decoding method.
The magnetic disk device 18 is storage means for storing data such as image data.
The network communication control unit 19 is a communication unit that communicates with the IP-FAX 101 and controls connection / communication and disconnection with the other HGW 113 via the HGW 112 and the NGN network 110. The network communication control unit 19 functions as first and second communication means related to the present invention.

Here, the system control unit 11 (CPU) executes a control program in the system memory 12, The request determination unit, the first session connection unit, the voice data according to the present invention are controlled by controlling each unit including the 38 encoding / decoding unit 16, the call connection message encoding / decoding unit 17, and the network communication control unit 19. Discard means, second session connection means, third session connection means, data reception means, data transmission means, reception source determination means , update means, notification means, registration means, confirmation means, reception rejection means, transmission prohibition means, It functions as fourth session connection means and recognition means.

Next, the registration process by the transmission / reception control device 10 shown in FIG. 2 will be described.
FIG. 3 is an explanatory diagram for explaining the registration process by the transmission / reception control device 10.
It is necessary to register the information shown in the following (a) and (b) in the transmission / reception control device 10.
(A) IP address of HGW 112 (b) IP address and telephone number of transmitting terminal (IP-FAX) 101

The IP address of the HGW 112 is registered in order to use the HGW 112 when transmitting / receiving data. Specifically, the system control unit 11 stores the IP address of the HGW 112 in the parameter memory 13 by a user operation (actually an operation signal generated in response to an operation on the operation display unit 15 of FIG. 2 by the user). And register.
The IP address and telephone number of the transmission terminal 101 are registered so that the transmission / reception control device 10 can change to the transmission terminal 101 and perform communication. Specifically, since the IP address and the telephone number are notified from the transmission terminal 101, the system control unit 11 stores and registers them in the parameter memory 13.

Next, behavior of the transmission terminal 101 by the transmission / reception control apparatus 10 illustrated in FIG. 2 will be described.
FIG. 4 is a diagram illustrating an example of an operation sequence between the transmission / reception control device 10 and the transmission terminal 101 for explaining the behavior of the transmission / reception control device 10 with respect to the transmission terminal 101.

The transmission / reception control device 10 behaves like the SIP server 102 and the destination terminal IP-FAX (destination terminal) 114 when viewed from the transmission terminal 101.
The transmission terminal 101 has a part for registering the IP address of the SIP server 102, and registers the IP address of the transmission / reception control device 10 there.
As a result, the NGN-incompatible transmission terminal (IP-FAX) 101 can be used for the NGN network 110 in the same manner as when IP-FAX transmission is performed to the IP network.

That is, since the transmission terminal 101 that does not support NGN registers the IP address of the transmission / reception control device 10 as the IP address of the SIP server 102, the transmission terminal 101 is connected to the transmission / reception control device 10 when attempting to access the SIP server 102. Therefore, when the transmission terminal 101 issues an “INVITE” message (including the IP address of the transmission / reception control apparatus 10) to the destination terminal 114 to the SIP server 102, the transmission terminal 101 is connected to the transmission / reception control apparatus 10 ( FIG. 4 ). S1).

  When the transmission / reception control apparatus 10 receives the “INVITE” message from the transmission terminal 101, if the message indicates a request for voice data communication (a request for establishing a session for voice communication), “100 Trying” “180 Ringing” Each response of “200 OK” is sequentially returned to the transmission terminal 101. As a result, communication OK is returned to the transmission terminal 101, and a voice communication session is established with the transmission terminal 101. At this time, in the conventional IP-FAX transmission that does not use the NGN network 110, the SIP server 102 returns the IP address of the destination terminal 114 to the transmission terminal 101. In this embodiment, the transmission / reception control device 10 has its own IP address. Is returned (S2).

When the transmission terminal 101 receives each response of “100 Trying”, “180 Ringing”, and “200 OK” from the transmission / reception control device 10 and receives a response of communication OK, the session with the SIP server 102 is established. It determines and notifies the transmission / reception control device 10 of an “ACK” message indicating that it has been accepted, starts communication of audio data to the IP address of the transmission / reception control device 10, and transmits the audio data to / from the transmission / reception control device 10. Communication is performed (S3, S4).
When the communication of the audio data is completed, the transmission / reception control device 10 issues an “INVITE” message to the transmission terminal 101 (S5).

When the transmission terminal 101 receives the “INVITE” message from the transmission / reception control apparatus 10, the transmission terminal 101 receives the message from the transmission terminal 101. If it indicates a request for communication of 38 data (session establishment request for T.38 communication), a response of “200 OK” is returned to the transmission / reception control device 10, so that T . 38 A session for communication is established (S6).
Upon receiving a “200 OK” response from the transmission terminal 101, the transmission / reception control device 10 determines that a session has been established with the transmission terminal 101 and notifies the transmission terminal 101 of an “ACK” message indicating that it has been accepted. T. 38 data communication is started and T.38 is transmitted to the transmission terminal 101. 38 data is communicated (S7, S8).

  Here, the transmission terminal 101 determines the transmission / reception control device 10 as the SIP server 102 and performs communication control during the period of the operation sequence of steps S1 to S3. Further, during the period of the operation sequence of steps S4 to S8, the transmission / reception control device 10 is determined as the destination terminal (reception terminal) 114 to perform communication control. Therefore, the operation sequence of steps S1 to S8 is the same as that in the case of performing conventional IP-FAX transmission that does not use the NGN network 110.

Next, the behavior of the transmission / reception control apparatus 10 shown in FIG. 2 for the HGW 112 will be described.
FIG. 5 is a diagram illustrating an example of an operation sequence between the transmission / reception control device 10 and the HGW 112 for explaining the behavior of the transmission / reception control device 10 with respect to the HGW 112.

The transmission / reception control device 10 includes the HGW 112 and the T.W. Only 38 data communication is performed (no audio data communication is performed).
In the transmission / reception control device 10, the IP address of the HGW 112 is registered by the user .
Whereby, just as use the HGW112 and when the normal IP-FAX transmission utilizing the NGN network 110.

That is, the transmission / reception control device 10 issues an “INVITE” message to the HGW 112 when the communication of the audio data with the transmission terminal 101 ends (S11 in FIG. 5).
When the HGW 112 receives the “INVITE” message (including the telephone number of the destination terminal 114) from the transmission / reception control device 10, the message is transmitted to the T.264. As long as it indicates a request for communication of 38 data (session establishment request for T.38 communication), an IP− using the normal NGN network 110 for the following two reasons (a) and (b): In order to interpret that FAX transmission is being performed, IP-FAX transmission is executed.

(A) Since the IP address of the HGW 112 is registered in the transmission / reception control device 10 in the same manner as the IP-FAX compatible with NGN, the transmission / reception control device 10 is related to the HGW 112 according to the IP-FAX compatible with NGN. Is exactly the same.
(B) The transmission / reception control device 10 is connected to the T.W. Only 38 data communication is performed with the HGW 112, and voice data communication is not performed with the HGW 112 at all. Discard all audio data.

  HGW112 is a T.W. Upon receiving a request for communication of 38 data and executing IP-FAX transmission, responses of “100 Trying”, “180 Ringing”, and “200 OK” are sequentially returned to the transmission / reception control device 10. As a result, the communication OK is returned to the transmission / reception control device 10, and T.O. 38 A session for communication is established. At this time, since it is IP-FAX transmission using the NGN network 110, its own IP address is returned (S12).

The transmission / reception control device 10 receives each response of “100 Trying”, “180 Ringing”, and “200 OK” from the HGW 112, and upon receiving a response to the communication OK, determines that a session with the HGW 112 has been established, An “ACK” message indicating that the request has been accepted is sent to the HGW 112, and the IP address of the HGW 112 is transmitted to the T.264. 38 data communication is started, and the H.W. 38 data is communicated (S13, S14).
Therefore, the operation sequence of steps S11 to S14 is the same as that in the case of performing normal IP-FAX transmission using the NGN network 110, and the IP-FAX 101 for the IP network can perform IP-FAX transmission using the NGN network 110. .

Next, an operation sequence at the time of IP-FAX transmission / reception using the NGN network 110 using the transmission / reception control apparatus 10 shown in FIG. 2 will be described.
FIG. 6 is a diagram showing an example of an operation sequence at the time of IP-FAX transmission using the NGN network 110 using the transmission / reception control device 10.

As described with reference to FIGS . 4 and 5 , the IP-FAX 101 that does not support NGN can perform IP-FAX transmission using the NGN network 110 by using the transmission / reception control device 10 . Hereinafter, the flow of the operation sequence shown in FIG. 6 will be described.

(1) The NGN-incompatible IP-FAX 101 sends an “INVITE” message (including the IP address of the transmission / reception control device 10) to the SIP server 102 toward the destination terminal-compliant NGN-compatible IP-FAX 114. (S21).
Here, the “INVITE” message first goes to the IP-FAX 114 via the SIP server 102. In the IP-FAX 101 not compatible with NGN, the IP address of the transmission / reception control device 10 is registered as the IP address of the SIP server 102. Therefore, the “INVITE” message issued from the IP-FAX 101 not compatible with NGN to the IP-FAX 114 is first sent to the transmission / reception control device 10.

(2) Upon receipt of the “INVITE” message, the transmission / reception control device 10 pretending to be a SIP server indicates “100” if the message indicates a request for communication of voice data (session establishment request for voice communication). By replying the “Trying”, “180 Ringing”, and “200 OK” responses to the IP-FAX 101 in sequence, the communication OK is returned to the IP-FAX 101 (S22 to S24), and between the IP-FAX 101 not compatible with NGN. Establish a session.

  Here, the NGN-incompatible IP-FAX 101 determines that the session is connected to the destination IP-FAX 114, and starts executing a normal IP-FAX transmission procedure (starts voice communication). In addition, when the “INVITE” message is received, the transmission / reception control device 10 makes a corresponding determination in step S102 of FIG. 8, step S202 of FIG. 9, and step S502 of FIG.

(3) The IP-FAX 101 receives “100 Trying”, “180 Ringing”, and “200 OK” responses from the transmission / reception control device 10, and receives an OK communication response, “ACK” indicating that it has been accepted. A message is notified to the transmission / reception control device 10 (S25), voice data communication is started to the IP address of the transmission / reception control device 10, and voice data communication is performed with the transmission / reception control device 10 (S26). At this time, the transmission / reception control apparatus 10 receives the voice data from the IP-FAX 101, but discards all of them (does not use the voice data for anything).

(4) The transmission / reception control device 10 terminates the communication of the voice data with the IP-FAX 101, discards all of the voice data (discards), and then receives the “INVITE” message received from the IP-FAX 101 not compatible with NGN. The contents are modified, and the modified “INVITE” message is issued to the destination IP-FAX 114 (S27). There are two modifications, and the multimedia type of SDP (Session Description Protocol) is changed from voice to T.264. Change to 38 (that is, change from a voice communication session establishment request to a T.38 communication session establishment request), and since the IP address of the SIP server 102 is the IP address of the transmission / reception control device 10, this is true. To the IP address of the (correct) SIP server 102.

As a result, it is possible to access the SIP server 102 and establish a session with the IP-FAX 114 which is the counterpart terminal via the HGW 112, the NGN network 110, and the HGW 113.
SDP is a protocol for describing information necessary for establishing a session.

(5) Upon receiving the “INVITE” message issued from the transmission / reception control device 10 to the IP-FAX 114, the HGW 112 transmits it to the destination-side HGW 113 via the NGN network 110 (S28).
When the HGW 113 receives an “INVITE” message from the transmission / reception control device 10 via the HGW 112 and the NGN network 110, if the message indicates a request for voice data communication (request for establishing a session for voice communication), “100 Responses “Trying”, “180 Ringing”, and “200 OK” are sequentially returned to the HGW 112 via the NGN network 110 (S29 to S31).

  The HGW 112 sequentially transfers each response of “100 Trying”, “180 Ringing”, and “200 OK” sent from the HGW 113 via the NGN network 110 to the transmission / reception control device 10 (S32 to S34). As a result, the communication OK is returned to the transmission / reception control device 10, and T.264 is transmitted between the transmission / reception control device 10 and the HGW 113 on the destination side. A session for 38 communication is established.

When the transmission / reception control device 10 receives each response of “100 Trying”, “180 Ringing”, and “200 OK” from the destination HGW 113 via the NGN network 110 and the HGW 112, the communication server 10 receives the response of the communication OK. It is determined that the session has been established, and an “ACK” message indicating that the session has been accepted is notified to the HGW 112 (S35).
The HGW 112 delivers the “ACK” message notified from the transmission / reception control device 10 to the HGW 113 via the NGN network 110 (S36).

(6) After sending the “ACK” message to the HGW 112, the transmission / reception control device 10 issues an “INVITE” message to the IP-FAX 101 that does not support NGN (S37).
When the IP-FAX 101 not compatible with NGN receives the “INVITE” message from the transmission / reception control device 10, the message is changed to T.264. If it indicates a request for communication of 38 data (session establishment request for T.38 communication), a response of “200 OK” is returned to the transmission / reception control device 10, so that T . 38 A session for communication is established (S38).

(7) NGN unsupported IP-FAX101, once a session between the transmission and reception control unit 10 is established, is notified of the "ACK" message indicating that the acknowledgment from the transmitting and receiving control unit 10 (S39), T. 38 data communication and the transmission / reception control device 10 to the T.38. 38 data is communicated (S40). When the communication ends, a “Bye” message indicating the end of the session is notified to the transmission / reception control device 10 (S41).
(8) Upon receiving the “Bye” message from the IP-FAX 101 that does not support NGN, the transmission / reception control device 10 receives the T.P. T.38 obtained from IP-FAX 101 with 38 communication. After transmitting 38 data to the HGW 112, a “Bye” message indicating the end of the session is notified to the HGW 112 (S42, S43).

(9) The HGW 112 sends the T.O. 38 data is received, the SIP server 102 is used to transmit the T.38 data via the destination side HGW 113 and the NGN network 110. 38. A session for communication is established and received T.38. After the 38 data communication is performed, when the “Bye” message is received from the transmission / reception control device 10, the “Bye” message is transmitted to the HGW 113 on the destination side via the NGN network 110 (S44, S45).

(10) The HGW 113 on the destination side is connected to the TGW with the HGW 112. When the communication of the 38 data ends, the destination terminal, the IP-FAX 114 that is compatible with NGN and the T.38 data. 38. A session for communication is established and received T.38. 38 data communication is performed. When the communication is completed and the “Bye” message is received from the HGW 112, “200
A response “OK” is returned to the HGW 112 via the NGN network 110 (S46).
The HGW 112 delivers the “200 OK” response sent from the destination-side HGW 113 via the NGN network 110 to the transmission / reception control device 10 (S47).
The transmission / reception control device 10 notifies the IP-FAX 101 not compatible with NGN of the response “200 OK” sent from the HGW 112 (S48).

FIG. 7 is a diagram showing an example of an operation sequence at the time of IP-FAX reception using the NGN network 110 using the transmission / reception control device 10 shown in FIG.
When the HGW 113 receives the “INVITE” message from the IP-FAX 114 that is compatible with NGN, the HGW 113 transmits it to the HGW 112 on the IP-FAX 101 side that is not compatible with NGN via the NGN network 110 (S51).

When the HGW 112 receives the “INVITE” message, the HGW 112 sends the message “T. If it indicates a request for communication of 38 data (session establishment request for T.38 communication), “100
Responses of “Trying”, “180 Ringing”, and “200 OK” are sequentially returned to the HGW 113 on the IP-FAX 114 side that is NGN-compatible via the NGN network 110, thereby responding to the communication with the HGW 113 (S52 to S54). T. 38 A session for communication is established.

  The HGW 113 receives each response of “100 Trying”, “180 Ringing”, and “200 OK” from the HGW 112 via the NGN network 110, and when receiving the response of the communication OK, the HGW 113 sends an “ACK” message indicating that it has been accepted. To the IP address of the HGW 112 (S55). 38 data communication is started, and T.38 is transmitted to the HGW 112. 38 data is communicated (S56). When the communication ends, a “Bye” message indicating the end of the session is notified to the HGW 112 (S57).

When the HGW 112 receives the “Bye” message, it returns a “200 OK” response to the HGW 113 (S58), and then notifies the previously received “INVITE” message to the transmission / reception control device 10 (S59).
When the transmission / reception control device 10 receives the “INVITE” message, the transmission / reception control device 10 determines that the message If it indicates a request for communication of 38 data (session establishment request for T.38 communication), the communication OK is performed by sequentially returning responses of “100 Trying”, “180 Ringing”, and “200 OK” to the HGW 112. In response to the HGW 112 (S60 to S62). 38 A session for communication is established.

Here, when the “INVITE” message is received from the HGW 112, the transmission / reception control device 10 makes a corresponding determination in step S202 of FIG. 9 and step S402 of FIG.
When the HGW 112 receives each response of “100 Trying”, “180 Ringing”, and “200 OK” from the transmission / reception control device 10 and receives a response to the communication OK, the HGW 112 transmits an “ACK” message indicating that it has been accepted. 10 to the IP address of the transmission / reception control device 10 (S63). 38 data communication and the transmission / reception control device 10 to the T.38. 38 data is communicated (S64), and when the communication is completed, a “Bye” message indicating the end of the session is notified to the transmission / reception control device 10 (S65).

Upon receiving the “Bye” message, the transmission / reception control device 10 returns a “200 OK” response to the HGW 112 (S 66), and then notifies the previously received “INVITE” message to the NGN-incompatible IP-FAX 101. (S67).
When the IP-FAX 101 that does not support NGN receives the “INVITE” message, the IP-FAX 101 receives the message “T. If it indicates a request for communication of 38 data (session establishment request for T.38 communication), “100
By sequentially returning each response Trying "" 180 Ringing "," 200 OK "to the transmission and reception control unit 10, in response to communication OK to the transceiver controller 10 (S68~S70), between the transmission and reception control apparatus 10 T . 38 A session for communication is established.

When the transmission / reception control device 10 receives each response of “100 Trying”, “180 Ringing”, and “200 OK” from the IP-FAX 101 and receives a response to the communication OK, the transmission / reception control device 10 sends an “ACK” message indicating that it has been accepted. -The FAX 101 is notified (S71) and the IP address of the IP-FAX 101 is transmitted to the T.C. 38 data communication and T.38 between IP-FAX101. 38 data is communicated (S72), and when the communication is completed, a “Bye” message indicating the end of the session is notified to the IP-FAX 101 (S73).
When receiving the “Bye” message, the IP-FAX 101 returns a response of “200 OK” to the transmission / reception control device 10 (S74).

Hereinafter, each embodiment of the communication control by the transmission / reception control apparatus 10 shown in FIG. 2 will be described.
[First embodiment]
First, a first embodiment of communication control by the transmission / reception control device 10 shown in FIG. 2 will be described.
FIG. 8 is a flowchart showing a first embodiment of the communication control.
In the following description, the IP-FAX 101 is referred to as “transmission terminal 101”, and the IP-FAX 114 is referred to as “destination terminal 114”.

  When the "INVITE" message is first notified from the transmission terminal 101, the transmission / reception control device 10 starts the communication control shown in FIG. 8, first receives the "INVITE" message in step S101, and then receives the "INVITE" message in step S102. It is determined whether or not the “INVITE” message indicates a session establishment request for voice communication. Although omitted for convenience of illustration, when an “INVITE” message is received, it is determined whether the reception is from the transmission terminal 101 or from the HGW 112, and reception from the transmission terminal 101 is performed. If it is (that is, data transmission by the transmission terminal 101), it is preferable to proceed to step S102 and subsequent steps.

If it is determined in step S102 that the received “INVITE” message indicates a voice communication session establishment request, the process advances to step S103 to establish a voice communication session with the transmission terminal 101. Let
Subsequently, in step S104, voice data is communicated (exchanged) with the transmission terminal 101, and then all the voice data received from the transmission terminal 101 in step S105 is discarded and is not sent to the HGW 112 side at all.

In the next step S106, the destination terminal 114 and the T.P. 38 communication is performed based on the information (IP address) such as the destination terminal 114 received from the transmission terminal 101 in step S103. 38, an “INVITE” message indicating a session establishment request for communication is transmitted to the HGW 112, and T.38 is transmitted to the HGW 112. 38 A session for communication is established.
In the next step S107, the transmitting terminal 101 and the T.P. 38 for performing communication. 38 transmits an “INVITE” message indicating a session establishment request for communication to the transmission terminal 101, and transmits a T.38 message to the transmission terminal 101. 38 A session for communication is established.

  In step S108, the transmitting terminal 101 and the T.S. 38 data is exchanged (communication). In step S109, the HGW 112 and the T.38 data are exchanged. 38 exchange data. As a result, the T.P. 38 data is transmitted to the HGW 112, and the T.38 data is transmitted. 38 data can be sent to the destination terminal 114. The HGW 112 communicates with the HGW 113 on the destination side and transmits the T.264 to the destination terminal 114 that is the destination receiving terminal. 38 data is transmitted.

T. in step S109. When the exchange of the 38 data is completed, the process proceeds to step S110 to end the communication.
In step S111, the voice communication and the T.P. Each communication result (data transmission / reception result) of 38 communication is recognized, and the recognition result is stored and saved in the parameter memory 13 as a communication history.

  On the other hand, as a result of the determination in step S102, if the “INVITE” message received from the transmission terminal 101 does not indicate a request for establishing a session for voice communication, the process proceeds to step S112 and Requested session (corresponding to the session establishment request indicated by the received “INVITE” message), for example, T. After the 38 communication session is established, in step S113, the received “INVITE” message is transmitted to the HGW 112 to establish the requested session with the HGW 112.

In step S114, data (for example, T.38 data) is exchanged with the transmission terminal 101, and in step S115, data (for example, T.38 data) is exchanged with the HGW 112. At this time, all the data received from the transmission terminal 101 is transmitted to the HGW 112 without any modification.
When the exchange of data in step S115 ends, the process proceeds to step S110 and the same control as described above is continued.

As described above, when the transmission / reception control apparatus 10 receives a session establishment request from the IP-FAX ( transmission terminal ) 101 connected to itself, the transmission / reception control apparatus 10 determines the content of the session establishment request. When the session establishment request is for requesting establishment of a voice communication session for transmitting voice data to the destination, a voice communication session is established with the IP-FAX 101, and the voice communication is performed. After ending, the audio data is discarded.

  Thereafter, T.W. 38 for transmitting data for communication. 38 issues a session establishment request for requesting establishment of a session for communication to the HGW 112 connected to the HGW 112, and establishes a T.38 communication with the HGW 112. 38 establishes a session for communication. 38 issues a session establishment request for requesting establishment of a session for communication to the IP-FAX 101, and establishes a T.38 communication with the IP-FAX 101. 38, a T.38 communication session is established. 38 data for communication is received, and the data is transmitted to the HGW 112.

  Therefore, even if the IP-FAX 101 is not compatible with the NGN network 110, which is a next-generation network that integrates a plurality of different networks, it can be connected to the NGN network 110 and attempts to transmit voice data to the destination IP-FAX 114 The voice data is discarded, and T. 38 communication data can be transmitted to a destination IP-FAX (destination terminal) 114.

  In addition, when the session establishment request from the IP-FAX 101 connected to the IP-FAX 101 requests establishment of a session for transmitting data other than voice data to the destination IP-FAX 114, the IP-FAX 101 When the data from the IP-FAX 101 is received and the data is transmitted to the HGW 112, the data other than the voice data is transmitted from the IP-FAX 101. When transmission is attempted, the data can be transmitted to the destination IP-FAX 114 as it is.

Further, by recognizing the communication result and storing and storing the recognition result in the parameter memory 13 as a communication history, the communication history is read from the parameter memory 13 when there is a communication history acquisition request from the IP-FAX 101. Can be transmitted to the IP-FAX 101 and displayed on the operation display unit. Alternatively, even when a communication history acquisition request is made from the operation display unit 15 of the transmission / reception control device 10, the communication history can be read from the parameter memory 13 and displayed on the operation display unit 15.

[Second Embodiment]
Next, a second embodiment of communication control by the transmission / reception control device 10 shown in FIG. 2 will be described.
FIG. 9 is a flowchart showing a second embodiment of the communication control.

  When the “INVITE” message is first notified from the transmission terminal 101 or the HGW 112, the transmission / reception control device 10 starts the communication control shown in FIG. 9 and first receives the “INVITE” message in step S201, and in step S202. It is determined whether reception of the “INVITE” message is reception from the HGW 112 or reception from the transmission terminal 101. If reception is from the transmission terminal 101, data transmission is performed by the transmission terminal 101. Then, after performing the same control as steps S102 to S109 and S112 to S115 in FIG. 8, the process proceeds to step S207.

  Here, since the transmission / reception control device 10 stores the IP address of the HGW 112 in the parameter memory 13 in addition to the IP address and telephone number of the transmission terminal (IP-FAX) 101, the “INVITE” message is received. Whether the reception is from the HGW 112 or the transmission terminal 101, the IP address of the transmission terminal 101 or HGW 112 included in the message is compared with the IP address stored in the parameter memory 13. It can be judged by.

On the other hand, when the reception of the “INVITE” message is reception from the HGW 112, the IP-FAX 101 becomes a receiving terminal (hereinafter referred to as “receiving terminal 101”) , and thus the process proceeds to step S203. After the requested session (for example, a T.38 communication session) is established, data (for example, T.38 data) is exchanged with the HGW 112 in step S204.
In step S205, the received “INVITE” message is transmitted to the receiving terminal 101 to establish a requested session with the receiving terminal 101. Communicate. Thereby, data exchanged with the HGW 112 can be transmitted to the receiving terminal 101.

When the exchange of data in step S206 ends, the process proceeds to step S207 to end communication.
In step S207, the above-described communication result is recognized, the recognition result is stored and saved in the parameter memory 13 as a communication history, and the communication control in FIG. 9 is terminated.

As described above, when the transmission / reception control device 10 receives data transmitted from the HGW 112 connected to the transmission / reception control device 10, the transmission / reception control device 10 determines that fact, and directly receives the received data to the IP-FAX (receiving terminal) 101 . By transmitting, the IP-FAX 101 connected to itself can receive the data from the external IP-FAX via the NGN network 110 as it is.

[Third embodiment]
Next, a third embodiment of communication control by the transmission / reception control device 10 shown in FIG. 2 will be described.
FIG. 10 is a flowchart showing a third embodiment of the communication control.

When the transmission terminal 101 is notified of the IP address and telephone number from the transmission terminal 101, the transmission / reception control device 10 starts the communication control shown in FIG.
Here, the transmission terminal (IP-FAX) 101 has a mechanism for automatically and periodically notifying the SIP server 102 of its own IP address and telephone number. The transmission / reception control device 10 has a mechanism for automatically registering itself when notified of the IP address and the telephone number.

When the communication control apparatus 10 starts the communication control shown in FIG. 10, first, in step S301, the transmission / reception control apparatus 10 receives a notification of an IP address and a telephone number from the transmission terminal 101, and in the next step S302, the received information (transmission terminal 101). IP address and telephone number) stored in the self (determines whether there is an IP address and telephone number) and the difference in the parameter memory 13 are stored in) the information (transmission terminal 101, difference If not, the communication control in FIG. 10 is terminated.

If there is a difference between the notified information and the information stored in itself, the process proceeds to step S303, and the information (transmission) stored in the parameter memory 13 is based on the information notified in step S301. The IP address or telephone number of the terminal 101 is updated. That is, the notified information is updated by overwriting the information stored in the parameter memory 13. When the information of the transmission terminal 101 is not stored at all (when connecting for the first time), it is determined that there is the difference.
Thereafter, the process proceeds to step S304, where the updated information (IP address and telephone number of the transmission terminal 101) is notified to the SIP server 102, and the communication control in FIG.
When the SIP server 102 is notified of the IP address and the telephone number, the SIP server 102 receives the notification and automatically registers the received information.

  In this way, the transmission / reception control device 10 is provided with the parameter memory 13 for storing the IP address and telephone number of the IP-FAX 101 connected to the transmission / reception control apparatus 10, and the telephone number and IP address notified from the IP-FAX 101 are stored. When received, the IP address or telephone number stored in the parameter memory 13 is updated as necessary (the IP address or telephone number that is different from the received telephone number or IP address is updated), and after the update By notifying the SIP server 102 of the telephone number and IP address of the IP-FAX 101, even if the telephone number or IP address of the IP-FAX 101 is changed, the communication with the external IP-FAX 114 is surely performed via the NGN network 110. It can be performed.

[Fourth embodiment]
Next, a description will be given of a fourth embodiment of communication control by the transmission / reception control device 10 shown in FIG. It is assumed that an IP-FAX other than the IP-FAX 101 can be connected to the transmission / reception control apparatus 10. In addition, data can be received from an IP-FAX other than the IP-FAX 114 via the NGN network 110.
FIG. 11 is a flowchart showing a fourth embodiment of the communication control.

In the transmission / reception control device 10, it is possible to set list information (reception refusal terminal list information) of transmission terminals that refuse reception in advance and store the list information in the parameter memory 13. For example, when reception-rejected terminal list information is received from the IP-FAX 101 (or the operation display unit 15 in FIG. 2 ), it can be stored in the parameter memory 13 and registered. The reception refusal terminal list information is identification information for identifying each transmission terminal that rejects each reception. In this embodiment, the IP address and telephone number of each transmission terminal correspond to each other. There may be.

When the “INVITE” message is first notified from the HGW 112, the transmission / reception control device 10 starts the communication control shown in FIG. 11, and first receives the “INVITE” message in step S401.
Next, in step S402, transmission indicated by the reception refusal terminal list information in which the transmission terminal such as the transmission terminal (IP-FAX) 114 indicated by the transmission source information included in the received “INVITE” message is set to itself. It is determined whether or not the terminal is included in the list of terminals. If the terminal is included in the list, data is not received from the transmitting terminal, and the process directly proceeds to step S404.

  If the transmission terminal indicated by the transmission source information included in the received “INVITE” message is not included in the list of transmission terminals indicated by the reception refusal terminal list information set to itself, the process proceeds to step S403. After performing the same control as steps S203 to S206 in FIG. 9, the process proceeds to step S404 to end the communication. In step S405, the communication result is recognized, and the recognition result is stored in the parameter memory 13 as a communication history. The data is stored and saved, and the communication control in FIG. 11 ends.

In this way, when the transmission / reception control device 10 receives the identification information of the other party who wants to refuse the notified reception from the IP-FAX 101 connected to the transmission / reception control device 10, the transmission / reception control device 10 registers the identification information and is connected to itself. When receiving a session establishment request for requesting establishment of a session for transmitting data from the HGW 112, the identification information of the IP-FAX such as the IP-FAX 114 that is the transmission source of the data is confirmed. If it matches the registered identification information, by rejecting the reception of data from the HGW 112, it is possible to reliably reject only the data from the other party whose reception is to be rejected.

[Fifth embodiment]
Next, a fifth embodiment of communication control by the transmission / reception control device 10 shown in FIG. 2 will be described.
FIG. 12 is a flowchart showing a fifth embodiment of the communication control.

In the transmission / reception control device 10, list information (transmission prohibited destination list information) of destinations (destination terminals) prohibited from transmission can be set in advance and stored in the parameter memory 13. For example, when the transmission prohibited destination list information is received from the IP-FAX 101 (or the operation display unit 15 in FIG. 2 ), it can be stored and registered in the parameter memory 13. The transmission prohibited destination list information is identification information for identifying each destination terminal. In this embodiment, the IP address and the telephone number of each destination terminal correspond to each other, but other identification information may be used.

When an “INVITE” message is first notified from a transmission terminal such as the transmission terminal 101, the transmission / reception control apparatus 10 starts communication control shown in FIG. 12, and first receives the “INVITE” message in step S501.
Next, in step S502, the destination terminal indicated by the transmission-prohibited destination list information in which the destination terminal such as the destination terminal (IP-FAX) 114 indicated by the destination information included in the received “INVITE” message is set. If it is included in the list, data is not transmitted to the destination terminal, and the process proceeds to step S504.

  If the destination terminal indicated by the destination information included in the received “INVITE” message is not included in the list of destination terminals indicated by the transmission-prohibited destination list information set in itself, the process proceeds to step S503. 8, after performing the same control as steps S102 to S109 and S112 to S115 in FIG. 8, the process proceeds to step S504 to end the communication. In step S505, the communication result is recognized, and the recognition result is used as a communication history parameter. The data is stored in the memory 13 and the communication control in FIG.

  As described above, when the transmission / reception control apparatus 10 receives the identification information of the other party whose transmission is to be prohibited notified from the IP-FAX 101 connected to the transmission / reception control apparatus 10, the transmission / reception control apparatus 10 registers the identification information and is connected to itself. When a session establishment request for requesting establishment of a session for transmitting data from the IP-FAX 101 is received, the identification information of the IP-FAX such as the IP-FAX 114 that is the transmission destination of the data is confirmed, and the identification information When the ID matches the registered identification information, by prohibiting the transmission of data from the IP-FAX 101, it is possible to reliably prohibit only the data to the other party whose transmission is to be prohibited.

  As described above, the present invention can be connected between an NGN-incompatible IP-FAX and an HGW, and the destination (external) IP-FAX via the IP-FAX, the HGW, the NGN network, and the destination-side HGW Although an embodiment applicable to a communicable transmission / reception control apparatus has been described, the present invention is not limited to this, and other communication terminals such as a digital multifunction peripheral having an IP-FAX function not compatible with NGN and network communication such as HGW Can be connected to the control device, and can communicate with the communication terminal such as the IP-FAX of the destination via the communication terminal, the network communication control device, the next generation network such as the NGN network, and the network communication control device on the destination side. It can be applied to various transmission / reception control devices.

[Program related to this invention]
This program is provided to a computer (CPU) that controls the transmission / reception control device, a request determination unit, a first session connection unit, a voice data discard unit, a second session connection unit, a third session connection unit, To realize functions as data receiving means, data transmitting means, receiving source judging means , updating means, notification means, registration means, confirmation means, reception refusing means, transmission prohibiting means, fourth session connection means, and recognition means The above-described effects can be obtained by causing the CPU to execute such a program.

Such a print control program may be stored in a storage means such as a ROM provided in the transmission / reception control device from the beginning, a non-volatile memory (flash ROM, EEPROM, etc.), or an HDD (hard disk device). CD-ROM as a medium, or a non-volatile recording medium (memory) such as a memory card, flexible disk, MO, CD-R, CD-RW, DVD + R, DVD + RW, DVD-R, DVD-RW, or DVD-RAM It can also be recorded and provided. The programs recorded on those recording media can be installed in the transmission / reception control device and executed by the CPU, or each program described above can be executed by causing the CPU to read out and execute this program from those recording media. .
Furthermore, it is also possible to download and execute an external device that is connected to a network and includes a recording medium that records the print control program, or an external device that stores the print control program in the storage unit.

  As is apparent from the above description, according to the present invention, even if the transmission / reception control device is a communication terminal that is not compatible with a next-generation network that integrates a plurality of different networks such as an NGN network, Can be connected. Therefore, it is possible to provide a transmission / reception control device that can be connected to the next-generation network even if the communication terminal is not compatible with the next-generation network.

10: Transmission / reception control device 11: System control unit 12: System memory 13: Parameter memory 14: Clock circuit 15: Operation display unit 16: T. 38 encoding / decoding unit 17: call connection message encoding / decoding unit 18: magnetic disk device 19: network communication control unit 101, 114: IP-FAX 102: SIP server 112, 113: HGW (home gateway)

JP 2006-229394 A

Claims (7)

A first communication unit that communicates with a communication terminal; and a second communication unit that communicates with a network communication control device that controls communication with a next-generation network. The first and second communication units include A transmission / reception control device for controlling transmission / reception of data using:
When a session establishment request is received from the communication terminal, request determination means for determining the content of the session establishment request;
As a result of the determination by the request determination means, when the session establishment request requests establishment of a session for voice communication for transmitting voice data toward the destination, the voice communication with the communication terminal is performed. First session connection means for establishing a communication session;
A voice data discarding unit configured to discard the voice data after the voice communication session is established by the first session connection unit and the voice communication is terminated;
After the voice data is discarded by the voice data discarding means, the ITU-T recommendation T.30. 38 for transmitting data for communication. 38 issues a session establishment request for requesting establishment of a session for communication to the network communication control apparatus, and the T.38 communication with the network communication control apparatus. Second session connection means for establishing a session for communication 38;
After the audio data is discarded by the audio data discarding means, the T.D. A session establishment request for requesting establishment of a session for communication is issued to the communication terminal, and the T.38 communication with the communication terminal is performed. A third session connection means for establishing a session for 38 communication;
By the third session connection means, the T.P. 38. When a session for communication is established, the T.38 received from the communication terminal is transmitted. 38 data receiving means for receiving data for communication;
By the second session connection means. 38 communication session is established, and the data receiving means receives the T.38 communication session. When receiving the 38 data for communication, setting a data transmitting means for transmitting the data to the network communication control device,
The second communication means uses SIP to store information in which a telephone number and an IP address are associated with each other, and communicates with a SIP server that controls communication based on the information.
Storage means for storing the telephone number and IP address of the communication terminal;
Updating means for updating the telephone number or IP address stored in the storage means as necessary when receiving the telephone number and IP address of the communication terminal notified from the communication terminal by the data receiving means When,
A transmission / reception control apparatus , comprising: a notification means for notifying the SIP server of a telephone number and an IP address updated by the update means . The transmission / reception control device according to claim 1,
When receiving data sent from the network communication control device by the data receiving means, provided a receiving source judgment means for judging that data has been received from the network communication control device,
The data transmission means transmits the received data as it is to the communication terminal when the reception source determination means determines that data has been received from the network communication control apparatus. . In the transmission / reception control device according to claim 1 or 2 ,
A registration means for registering the identification information when receiving the identification information of the other party who wishes to refuse the reception notified from the communication terminal by the data receiving means;
Confirmation means for confirming the identification information of the transmission source of the data when receiving a session establishment request for requesting establishment of a session for transmitting data from the network communication control device by the data receiving means;
A reception rejection means for rejecting reception of data from the network communication control device when the identification information of the transmission source confirmed by the confirmation means matches the identification information registered by the registration means; A transmission / reception control device. In the transmission / reception control device according to claim 1 or 2 ,
Registration means for registering the identification information when receiving the identification information of the other party whose transmission is notified from the communication terminal by the data receiving means;
Confirmation means for confirming identification information of a destination of the data when receiving a session establishment request for requesting establishment of a session for transmitting data from the communication terminal by the data receiving means;
A transmission prohibiting unit for prohibiting data transmission from the communication terminal when the identification information of the transmission destination confirmed by the confirmation unit coincides with the identification information registered by the registration unit; A transmission / reception control device. In the transmission / reception control device according to any one of claims 1 to 4 ,
As a result of the determination by the request determination means, when the session establishment request is for requesting establishment of a session for transmitting data other than the voice data toward the destination, and between the communication terminal and the network Providing a fourth session connection means for establishing each requested session with the communication control device;
The data receiving means transmits the data to the network communication control device when a session requested by the fourth session connecting means is established and data is received by the data receiving means. A transmission / reception control device. In the transmission / reception control device according to any one of claims 1 to 5 ,
Recognizing means for recognizing the result of data reception by the data receiving means and data transmission by the data transmitting means;
A transmission / reception control apparatus comprising storage means for storing a recognition result by the recognition means. A first communication unit that communicates with a communication terminal; and a second communication unit that communicates with a network communication control device that controls communication between a plurality of different networks . And means for storing information in which a telephone number and an IP address are associated with each other, and means for communicating with a SIP server for controlling communication based on the information, and the first and second communication means, A transmission / reception control apparatus for controlling transmission / reception of data between
When a session establishment request is received from the communication terminal, a request determination step for determining the content of the session establishment request;
As a result of the determination by the request determination step , when the session establishment request is for requesting establishment of a session for voice communication for transmitting voice data toward the destination, the voice communication with the communication terminal is performed. A first session connection step for establishing a communication session;
A voice data discarding step of discarding the voice data after the voice communication session is established by the first session connection step and the voice communication is terminated;
After the audio data is discarded by the audio data discarding step, ITU-T recommendation T. 38 for transmitting data for communication. 38 issues a session establishment request for requesting establishment of a session for communication to the network communication control apparatus, and the T.38 communication with the network communication control apparatus. A second session connection step for establishing a session for communication 38;
After the voice data is discarded by the voice data discarding step, the T.D. A session establishment request for requesting establishment of a session for communication is issued to the communication terminal, and the T.38 communication with the communication terminal is performed. A third session connection step for establishing a session for communication 38;
In the third session connection step, the T.P. 38. When a session for communication is established, the T.38 received from the communication terminal is transmitted. 38 data receiving process for receiving data for communication;
In the second session connection step, the T.P. 38 communication session is established, and the data reception step causes the T.38 communication. A data transmission step of transmitting the data to the network communication control device when receiving data for 38 communication;
A storage step of storing a telephone number and an IP address of the communication terminal;
An update step of updating the telephone number or IP address stored in the storage step as necessary when receiving the telephone number and IP address of the communication terminal notified from the communication terminal by the data receiving step When,
A control method comprising: a notification step of notifying the SIP server of the telephone number and IP address that have been updated by the updating step .

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