JP4522842B2 - IP telephone system, IP telephone apparatus, and file transfer method - Google Patents

Description

  The present invention relates to an IP telephone system, an IP telephone apparatus, and a file transfer method that enable file transfer over an IP network.

  At present, with the rapid spread of the Internet, an IP telephone system that can make a free call between a remote telephone apparatus and a low-cost telephone call or an IP telephone apparatus possessed by a registered member is drawing attention. In such an IP telephone system, call control is performed between a caller IP telephone apparatus and a callee IP telephone apparatus using a call control protocol such as a SIP (Session Initiation Protocol) protocol, and then voice information is transferred to RTP ( By using an information transfer protocol such as Realtime Transport Protocol, it is possible to communicate between both users.

On the other hand, in recent years, with the explosive spread of digital image capturing devices such as digital cameras, image data and the like photographed using these devices are transmitted to the other party that is the subject. Such transmission of image data or the like is generally performed by attaching the image data or the like to an e-mail.
JP 2004-48239 A

  However, when image data or the like is attached to an e-mail and transmitted, a long transmission time may be required until the transmission is completed. In this case, there is a problem that attachment of image data is substantially limited. is there.

  On the other hand, if image data and the like can be transmitted using the currently popular IP telephone system, convenience for the user is improved. However, the current IP telephone system generally does not have a function of transferring files such as image data. For this reason, there is a demand for an IP telephone system that can transfer files such as image data.

  The present invention has been made in view of such problems, and an IP telephone system, an IP telephone apparatus, and a file transfer method capable of performing file transfer after performing call control processing with an IP telephone apparatus of a communication partner. The purpose is to provide.

The present invention comprises: an IP telephone apparatus connected to an IP network and having a voice call function; and a server apparatus that registers information related to the IP telephone apparatus and responds to the registration information in response to a request from the IP telephone apparatus. When the IP telephone system on the calling side receives the voice call instruction, the IP telephone system on the calling side performs call processing using the registration information of the called IP phone device acquired from the server device by call control processing, In response to a file transfer instruction during a voice call with the destination IP telephone apparatus, a file is sent to the destination IP telephone apparatus using the registration information of the destination IP telephone apparatus acquired by the call control process. If a call termination instruction is received before this file transfer is completed, it is established with the IP telephone device on the called side until the file transfer is completed. The is obtained by way maintain the connection.

  According to the IP telephone system, IP telephone apparatus, and file transfer method of the present invention, file transfer can be performed after performing call control processing with the IP telephone apparatus of the communication partner.

An IP telephone system according to a first aspect of the present invention registers an IP telephone apparatus connected to an IP network and having a voice call function, information on the IP telephone apparatus, and the registration according to a request from the IP telephone apparatus An IP telephone system comprising: a server apparatus that responds to information, wherein the IP telephone apparatus on the caller side receives a voice call instruction and receives the voice call instruction from the server apparatus on the callee side acquired by the call control process. Performs call processing using the registration information, receives a file transfer instruction during a voice call with the called IP phone device, and uses the registration information of the called IP phone device acquired by the call control processing. start the file transfer with respect to the destination IP telephone apparatus, the file transfer until the end if this file transfer instruction is received call end before exiting A configuration that maintains the connection established between the destination IP telephone apparatus.

According to this configuration, the file is transferred to the destination IP telephone apparatus using the registration information of the destination IP telephone apparatus acquired by the call control process performed in response to the voice call instruction. For this reason, it is possible to perform file transfer after performing the call control process with the IP telephone apparatus of the communication partner using the registration information of the destination IP telephone apparatus acquired by the call control process. In addition, even when a call termination instruction is received by on-hook before the file transfer to the called IP phone device is completed, the connection established with the called IP phone device is maintained until the file transfer is completed. Therefore, the call can be ended by on-hooking without waiting for the end of the file transfer.

According to a second aspect of the present invention, in the IP telephone system according to the first aspect, when the IP telephone device on the calling side receives an instruction to end the call after the file transfer ends , the IP address on the receiving side A configuration is adopted in which the connection established with the telephone device is disconnected.

  According to this configuration, when a call termination instruction is received after file transfer to the terminating IP telephone apparatus is completed, the connection established with the terminating IP telephone apparatus is disconnected. For this reason, it is possible to reliably disconnect the connection established with the IP telephone device on the receiving side in response to the call termination instruction.

According to a third aspect of the present invention, in the IP telephone system according to the first aspect, the originating IP telephone apparatus specifies the number of data packets to be transmitted collectively to the terminating IP telephone apparatus. The transmission control information to be transmitted is transmitted before starting the file transfer, and at the time of the file transfer, the data is collectively transmitted until the number of data packets is reached.
According to this configuration, a plurality of data packets can be transmitted together in file transfer.
An IP telephone apparatus according to a fourth aspect of the present invention is an IP telephone apparatus that registers information related to an IP telephone apparatus and connects to a server apparatus that responds to the registration information in response to a request from the IP telephone apparatus. An IP telephone control unit that performs a call process using registration information of another IP telephone apparatus acquired from the server apparatus by a call control process for performing a voice call with another IP telephone apparatus on the network; and the IP telephone control A file transfer unit that transfers the file to the other IP telephone device using the registration information of the other IP telephone device acquired by the call control processing by the unit, and the IP telephone control unit includes the other IP telephone device. When a file transfer is started by the file transfer unit during a voice call with the telephone device, and the call end instruction is received before the file transfer ends, the file transfer Feed has a configuration that maintains the connection established between the other IP telephone apparatus until the end.

According to this configuration, the file is transferred to the IP telephone apparatus on the receiving side using the registration information of the other IP telephone apparatus acquired by the call control process for performing a voice call. For this reason, it is possible to perform file transfer after performing the call control process with the IP telephone apparatus of the communication partner using the registration information of the other IP telephone apparatus acquired by the call control process. In addition, even when a call termination instruction is received by on-hook before the file transfer to the called IP phone device is completed, the connection established with the called IP phone device is maintained until the file transfer is completed. Therefore, the call can be ended by on-hooking without waiting for the end of the file transfer.

According to a fifth aspect of the present invention, in the IP telephone apparatus according to the fourth aspect, when the IP telephone control unit receives an instruction to end the call after the file transfer by the file transfer unit is completed, The configuration is such that the connection established with the IP telephone apparatus is disconnected.

  According to this configuration, the connection established with the other IP telephone apparatus is disconnected when an instruction to terminate the call is received after the file transfer to the other IP telephone apparatus is completed. For this reason, it is possible to reliably disconnect the connection established with another IP telephone apparatus in response to the call termination instruction.

According to a sixth aspect of the present invention, in the IP telephone apparatus according to the fourth aspect, the IP telephone control unit designates the number of data packets to be transmitted collectively to the other IP telephone apparatus. The information is transmitted before starting the file transfer, and at the time of the file transfer, data is collectively transmitted until the number of data packets is reached.
According to this configuration, a plurality of data packets can be transmitted together in file transfer .

A file transfer method according to a seventh aspect of the present invention performs call processing using registration information of another IP telephone device acquired by call control processing for performing a voice call with another IP telephone device on an IP network. In response to a file transfer instruction during a voice call with the other IP telephone apparatus, and starts transferring the file using the registration information of the other IP telephone apparatus acquired by the call control process. When a call termination instruction is received before the transfer is completed, the connection established with the other IP telephone apparatus is maintained until the file transfer is completed .

According to an eighth aspect of the present invention, in the file transfer method according to the seventh aspect, when a call termination instruction is received after the file transfer to the other IP telephone device is terminated, The connection established between the two is disconnected.

According to a ninth aspect of the present invention , in the file transfer method according to the seventh aspect, before the file is transferred to the other IP telephone apparatus, the data packets transmitted collectively to the other IP telephone apparatus Transmission control information designating the number of data packets is transmitted, and at the time of file transfer, data is collectively transmitted until the number of data packets is reached.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing a network configuration to which an IP telephone system according to an embodiment of the present invention is applied.

  As shown in the figure, in the IP telephone system according to the present embodiment, a plurality of IP telephone apparatuses (hereinafter referred to as “IP telephones”) 101 and 102 and a CA (Call Agent) 103 are installed in an IP network 104. Connected through. The IP telephone system may be configured by connecting three or more IP telephones on the IP network 104 without being limited to the configuration shown in FIG.

  The IP phone 101 (102) has a function that enables voice calls with other IP phones via the IP network 104. Further, it has a function as a server and a client capable of transmitting and receiving files in accordance with a file transfer protocol such as FTP (File Transfer Protocol) protocol. That is, it has a function of requesting file transfer to another IP phone according to the FTP protocol, etc., and transferring a designated file when a request for file transfer is received from another IP phone according to the FTP protocol. Yes.

  The CA 103 manages a voice call via the IP network 104 in an IP phone installed on the IP network 104. The CA 103 has a function as a SIP (Session Initiation Protocol) server, for example, and performs call control between the IP phone 101 and the IP phone 102.

  FIG. 2 is a block diagram showing a schematic configuration of IP phone 101 according to the present embodiment. IP phone 102 has the same configuration as IP phone 101.

  In the IP phone 101 shown in the figure, an IP phone control unit 201 controls all operations necessary for making a voice call via the IP network 104. For example, the IP telephone control unit 201 performs call control with the destination terminal according to a call control protocol typified by the SIP protocol. When executing the call control, the IP telephone control unit 201 acquires a URI (Uniform Resource Identifier) of the destination terminal from the CA 103 based on the input telephone number, and inquires a DNS server (not shown) using this URI. To obtain the IP address of the destination terminal.

  The file transmission / reception unit 202 transmits and receives files via the IP network 104 according to a file transfer protocol such as the FTP protocol. The URI and IP address used when the file transmission / reception unit 202 transmits / receives a file is given from the IP telephone control unit 201. The file transmission / reception unit 202 transmits a file in accordance with an instruction from the user of the IP phone 101. In the following description, the FTP protocol is used as the file transfer protocol used by the file transmission / reception unit 202, but other file transfer protocols can also be applied. For example, a file transfer protocol such as a TFTP (Trivial File Transfer Protocol) protocol or an HTTP protocol can be applied.

  The display unit 203 is configured by a liquid crystal display such as an LCD. The display unit 203 displays the current status of the IP phone 101 and displays a file to be transmitted and a received file in accordance with an instruction from the user of the IP phone 101. The internal memory 204 stores a file transmitted by the file transmission / reception unit 202 and a file received by the file transmission / reception unit 202. The external memory 205 includes a memory card such as an SD memory card (registered trademark). It adopts a configuration that can be attached to and detached from a card slot, which will be described later, and stores a file transmitted by the file transmitting / receiving unit 202 and a file received by the file transmitting / receiving unit 202 in the same manner as the internal memory 204.

  FIG. 3 is a front view showing the appearance of IP phone 101 according to the present embodiment. IP phone 102 has the same configuration as IP phone 101.

  As shown in the figure, the IP phone 101 includes a receiver 301 that receives an operator's voice. Also provided is a numeric keypad 302 that accepts input of a telephone number or the like. Furthermore, an answering key 303 for switching to an answering machine and a speaker key 304 for switching sound to an external output are provided on the right side of the numeric keypad 302. Furthermore, a function key 305 is provided above the numeric keypad 302. The function key 305 includes a file transfer button for instructing file transfer.

  In addition, the IP phone 101 includes a display unit 203 configured with a liquid crystal display or the like above the function keys 305. An interface (LAN I / F) 306 with a LAN connected to the IP network 104 is provided on the upper side surface of the display unit 203. Furthermore, a card slot 307 into which a memory card such as an SD memory card (registered trademark) is inserted is provided on the lower right side portion of the answering key 303 and the speaker key 304.

  Using IP telephone 101 according to the present embodiment having such a configuration, a user inputs a telephone number with numeric keypad 302 to designate a communication partner and makes a call with the user of the communication partner. . During the call, the memory card on which the file is recorded is inserted into the card slot 307, the file in the memory card is selected with the numeric keypad 302, and then the file transfer button of the function key 305 is pressed to select the file selected as the other party. Can be sent.

  Hereinafter, in the IP telephone system according to the present embodiment, an operation in which IP telephone 101 makes a call with IP telephone 102 and transmits a file during the call will be described with reference to the sequence diagram shown in FIG.

  Here, a case where image data is transmitted as a transmission target file will be described. For example, a user of IP phone 101 takes image data with a digital camera or the like using a memory card such as an SD memory card (registered trademark) as a recording medium, and uses the memory card storing the image data in the present embodiment. It can be considered that the card is inserted into the card slot 307 of the IP phone 101 according to the above.

  In order for the CA 103 to perform call control between the IP phone 101 and the IP phone 102 on the IP network 104, it is necessary to register information on each IP phone in advance. Therefore, as shown in FIG. 4, it is necessary to send a “Register” message from IP phone 101 to CA 103 and to return a “200 OK” message from CA 103 to IP phone 101 (ST401, ST402). . Similarly, it is necessary to send a “Register” message from IP phone 102 to CA 103 and to return a “200 OK” message from CA 103 to IP phone 102 (ST403, ST404).

  In FIG. 4, the registration procedure of information of each IP phone to CA 103 is shown for the case of registering information from IP phone 102 first, but is not limited to this, and the example shown in FIG. Conversely, the information may be registered first from the IP phone 101.

  When IP phone 101 makes a call with IP phone 102, IP phone 101 first receives the phone number of IP phone 102 from the user (dial). When receiving the telephone number of IP phone 102, IP phone 101 inquires of CA 103 for registration information of IP phone 102 and acquires the URI of IP phone 102. Then, based on the acquired URI, an “INVITE” message is sent to IP phone 102 via CA 103 (ST405, ST406). At this time, the acquired URI of IP phone 102 is held in IP phone control unit 201 of IP phone 101.

  When the “INVITE” message is received from IP phone 101, IP phone 102 rings a ringing tone (calling). In parallel with the ringing of the ringing tone, “180 Ringing” message is transmitted from IP phone 102 to IP phone 101 via CA 103 (ST407, ST408). In response to this “180 Ringing”, IP phone 101 outputs a ringback tone (RBT).

  When off-hook or a response is detected in IP phone 102 (off-hook, response), IP phone 102 transmits a “200 OK” message indicating connection permission to IP phone 101 via CA 103 (ST409, ST410). When this “200 OK” message is received, an “ACK” message is sent from IP phone 101 to IP phone 102 via CA 103 (ST411, ST412). When IP phone 102 receives this “ACK” message, it becomes possible to make a call between IP phone 101 and IP phone 102, and a call is made (ST413).

  Here, after a memory card is inserted by the user of IP phone 101 during a call, a file to be transmitted in the memory card is selected, and a file transfer button is pressed. When the pressing of the file transfer button is detected, the IP phone 101 shifts to a file transfer sequence for transferring a file to be transmitted with the IP phone 102. In the file transfer sequence, IP phone 101 transmits to IP phone 102 a transmission target file specified in accordance with the FTP protocol. At this time, a call can be performed while transferring the file, and transmission / reception of voice packets for the call and data transmission of the file transfer sequence are performed alternately. Details of this file transfer sequence will be described later.

  After the file to be transmitted is transferred to the IP phone 102 by the file transfer sequence, when the IP phone 101 detects a call end instruction such as on-hook from the user (call end), the IP phone 101 sends the IP phone via the CA 103 to the IP phone. A “BYE” message indicating line disconnection is sent to 102 (ST414, ST415). When this “BYE” message is received, IP phone 102 transmits a “200 OK” message indicating permission of disconnection to IP phone 101 via CA 103 (ST416, ST417). In this manner, a call is made between IP phone 101 and IP phone 102, and an operation of transmitting a file during the call is performed.

  Here, the above-described file transfer sequence will be described with reference to sequence diagrams shown in FIGS. 5 and 6 are sequence diagrams for explaining the above-described file transfer sequence.

  When transmitting a file, the sequence shown in FIG. 5 transmits data for each predetermined data packet and receives 200 OK accordingly, whereas in the sequence shown in FIG. 6, data transmission is performed before data transmission. A difference is that a plurality of data packets are transmitted together by transmitting a data control file including information for performing control. First, the description will be made with reference to FIG. 5, and the points different from FIG. 5 will be described with reference to FIG.

  When shifting to the file transfer sequence, the file transfer button is pressed after the user of the IP phone 101 designates the file to be transmitted. When the file transfer button is pressed by the user, transmission of the file is started (file transmission start). At this time, a file transmission request (transmission request command) is sent from IP phone 101 to IP phone 102 in response to pressing of the file transfer button (ST501). This file transmission request is realized by designating “ftp” as the ID according to the FTP protocol and designating “URI of the communication partner (IP phone 102)” as the password. The URI of the communication partner designated here is held in IP telephone control unit 201 of IP telephone 101.

  When the file transmission request is received, IP phone 102 transmits a “200 OK” message indicating that the file transmission request has been received from IP phone 101 (ST502). When IP phone 101 receives this “200 OK” message, a connection using the file transfer protocol is established between IP phone 101 and IP phone 102 (ST503).

  When the connection using the file transfer protocol is established, data is transmitted from IP phone 101 to IP phone 102 together with a command (data transmission request command) indicating the start of data transmission (ST504). For example, “put” is used as the command indicating the start of data transmission. The data transmitted here is transmitted for each predetermined data packet. When data for a predetermined data packet is received, IP phone 102 transmits a “200 OK” message indicating that to IP phone 101 (ST505).

  When this “200 OK” message is received, data is transmitted again from IP phone 101 together with a command indicating the start of data transmission (ST506). When data for a predetermined data packet is received, IP phone 102 transmits a “200 OK” message to IP phone 101 again (ST507). Similar processing is repeated until data transmission of the transmission target file is completed.

  When the data transmission of the file to be transmitted is completed, a command (end command) indicating the end of data transmission is transmitted from IP phone 101 to IP phone 102 (ST508). For example, “quit” is used as the command indicating the end of data transmission. When this command is received, IP phone 102 transmits a “221 Good Bye” message indicating that to IP phone 101 (ST509). By receiving this “221 GoodBye” message at IP phone 101, the connection using the file transfer protocol established between IP phone 101 and IP phone 102 is disconnected. In this way, the file designated by the user of IP phone 101 is transferred to IP phone 102.

  On the other hand, in the file transfer sequence shown in FIG. 6, as in the file transfer sequence shown in FIG. 5, a “200 OK” message is returned in response to the file transfer request from the IP phone 101, thereby establishing a connection using the file transfer protocol. Established (ST501 to ST503). The file transfer sequence shown in FIG. 6 is different from the file transfer sequence shown in FIG. 5 in the subsequent processing.

  When the connection using the file transfer protocol is established, a data control file including information for performing data transmission control is transmitted from IP telephone 101 to IP telephone 102 before data transmission (ST601). In the data control file, for example, the number of data packets transmitted together is specified. When the data control file is received, IP phone 102 sends a “200 OK” message indicating that the data control file has been received to IP phone 101 (ST602).

  When this “200 OK” message is received, data is transmitted from IP phone 101 together with a command indicating the start of data transmission (ST603). After transmitting this data, IP phone 101 further transmits data together with a command indicating the start of data transmission (ST604). Data is transmitted together with a command indicating the start of data transmission from IP phone 101 until the number of data packets specified in the data control file is reached. When the number of data packets specified by the data control file is received, “200 OK” message is sent from IP phone 102 to IP phone 101 (ST605). Similar processing is repeated until data transmission of the transmission target file is completed.

  When the data transmission of the transmission target file is completed, IP phone 101 transmits a command (end command) indicating the end of data transmission to IP phone 102 (ST508). When this command is received, “221 Good Bye” message is transmitted from IP phone 102 to IP phone 101 (ST509). By receiving this “221 GoodBye” message at IP phone 101, the connection using the file transfer protocol established between IP phone 101 and IP phone 102 is disconnected. In this way, the file designated by the user of IP phone 101 is transferred to IP phone 102.

  Hereinafter, the operation of the originating IP phone 101 and the operation of the terminating IP phone 102 in the sequence shown in FIGS. 4 and 5 (FIG. 6) will be described. FIG. 7 is a flowchart for explaining the operation of originating IP phone 101 in the sequence shown in FIGS. 4 and 5 (FIG. 6). FIG. 8 is a flowchart for explaining the operation of IP phone 102 on the called side in the sequence shown in FIGS. 4 and 5 (FIG. 6).

  As shown in FIG. 7, in the standby state, IP phone 101 on the caller side monitors whether it accepts input of a telephone number from the user (ST701). When the input of the telephone number is accepted, the CA 103 is inquired about registration information regarding the accepted telephone number, and the URI of the destination IP telephone (here, the IP telephone 102) corresponding to the telephone number is acquired. . Then, an “INVITE” message is sent based on the acquired URI (ST702). Thereafter, it is monitored whether a “200 OK” message is received from destination IP phone 102 (ST703).

  If the "200 OK" message is confirmed, IP phone 101 transmits an "ACK" message to IP phone 102 (ST704). If the “200 OK” message cannot be confirmed for a predetermined time, it is determined that the call has failed, and the process ends. After the transmitted “ACK” message is confirmed by IP phone 102, a call is started between the users of both IP phones (ST705).

  When the call is started, IP phone 101 determines whether the user transfers the file stored in the memory card to the other party. Specifically, first, it is determined whether a memory card is inserted into the card slot 307 (ST706). If a memory card is inserted, it is determined whether a transmission target file is selected using numeric keypad 302 or the like (ST707). If a transmission target file is selected, it is determined whether a file transfer button is selected (ST708).

  If the memory card is not inserted in ST706 or if the transmission target file is not selected in ST707, IP phone 101 skips the process to ST713, which will be described later, and determines whether the call has ended. If the file transfer button is not selected in ST708, the monitoring operation is continued until it is selected.

  If the file transfer button is selected, IP phone 101 sends a file transmission request to IP phone 102 (ST709). When sending a file transmission request, the file transmission / reception unit 202 of the IP phone 101 designates “ftp” as the ID according to the FTP protocol under the instruction of the IP phone control unit 201 and “URI of the IP phone 102” as the password. Is specified. As a result, it is possible to specify the file transmission destination by the FTP protocol using the communication partner information acquired in the call control process.

  After sending the file transmission request, IP phone 101 monitors whether it receives a “200 OK” message from IP phone 102 (ST710). If the "200 OK" message is confirmed, file data is transmitted to IP phone 102 (ST711). If the “200 OK” message cannot be confirmed for a predetermined time, it is determined that the file transfer has failed, and IP phone 101 skips the process to ST713, which will be described later, and determines whether the call has ended.

  While transmitting file data, IP phone 101 monitors the end of file data transmission (ST712). If the end of file data transmission is detected, IP phone 101 monitors the end of the call (ST713). Further, when the end of the call is detected by on-hook, IP phone 101 transmits a “BYE” message to IP phone 102 (ST714). Thereafter, it is monitored whether a “200 OK” message is received from IP phone 102 (ST715). If the “200 OK” message is confirmed, IP phone 101 disconnects communication with IP phone 102 and ends the process of transferring the file during the above-described call. In this way, the file designated by the user of IP phone 101 is transmitted to IP phone 102.

  On the other hand, as shown in FIG. 8, in the standby state, IP phone 102 on the receiving side monitors whether or not an “INVITE” message is received from the IP phone on the outgoing side (here, IP phone 101) (ST801). . If an “INVITE” message is received, a call signal is sounded to determine whether a response such as off-hook is accepted from the user (ST802). When receiving a response such as off-hook from the user, IP phone 102 transmits a “200 OK” message to IP phone 101 (ST803). If a response such as off-hook is not accepted from the user, the monitoring operation in ST802 is continued.

  After transmitting the “200 OK” message to IP phone 101, IP phone 102 monitors whether an “ACK” message is received from IP phone 101 (ST804). When the “ACK” message is confirmed in IP phone 102, a call is started between the users of both IP phones (ST805). If the “ACK” message is not received from IP phone 101, the monitoring operation in ST804 is continued.

  When a call is started, IP phone 102 determines whether a file is transferred from IP phone 101. Specifically, it is determined whether a file transmission request is received from IP phone 101 (ST806). If the file transmission request is confirmed, IP phone 102 transmits a “200 OK” message to IP phone 101 (ST807). When this “200 OK” message is received by IP phone 101, file data is transmitted from IP phone 101, and IP phone 102 receives this file data (ST808).

  While receiving file data, IP phone 102 monitors the end of reception of file data (ST809). If the end of reception of file data is detected, IP phone 102 determines whether or not to receive a “BYE” message from IP phone 101 (ST810). When confirming the “BYE” message, IP phone 102 transmits a “200 OK” message to IP phone 101 (ST811). If the “200 OK” message is transmitted, IP phone 102 disconnects communication with IP phone 101 and ends the process of receiving file transfer during the above-described call. In this way, the file designated by the user of IP phone 101 is received by IP phone 102.

  Thus, according to the IP telephone system according to the present embodiment, in the IP telephone apparatus (IP telephone 101) on the outgoing side, the IP telephone apparatus on the incoming side acquired by the call control processing performed in response to the voice call instruction Using the registration information (URI) of (IP phone 102), the file is transferred to the destination IP phone device (IP phone 102). Therefore, file transfer can be performed after performing call control processing with the IP telephone device of the communication partner using the registration information of the destination IP telephone device (IP phone 102) acquired by the call control processing. .

  In particular, in the IP telephone system according to the present embodiment, the originating IP telephone apparatus (IP telephone 101) receives a file transfer instruction during call processing with the terminating IP telephone apparatus (IP telephone 102). Then, the file is transferred using the registration information of the IP telephone device (IP telephone 102) on the receiving side. Therefore, file transfer can be performed using the registration information of the called IP telephone device (IP telephone 102) acquired by the call control process during a call.

  Also, in the IP telephone system according to the present embodiment, when a call termination instruction is received after file transfer to the terminating IP telephone apparatus (IP telephone 102) is completed, the terminating IP telephone apparatus (IP telephone) 102) is disconnected. For this reason, it is possible to reliably disconnect the connection established with the IP telephone device (IP telephone 102) on the receiving side in response to the call termination instruction.

  Furthermore, in the IP telephone system according to the present embodiment, when a call termination instruction is received before the file transfer to the destination IP telephone apparatus (IP telephone 102) is terminated, the file transfer is terminated. The connection established with the IP telephone device (IP telephone 102) on the called side is maintained. Therefore, it is possible to end the call by on-hooking without waiting for the end of the file transfer.

  In the present embodiment, a case is described in which a file is transferred during a call between IP phone 101 and IP phone 102, and the call ends after the file transfer ends. However, depending on the size of the data capacity of the file, there may be a case where it takes a long time to complete the file transfer. Therefore, it is preferable as an embodiment to start the file transfer during a call and to continue the file transfer even when the call ends. Such a change can be realized by maintaining the connection even when there is a call termination instruction such as on-hook from the user. For example, by not sending a “BYE” message in response to a call end instruction such as on-hook, but detecting the end of file transfer and sending a “BYE” message, there is a call end instruction such as on-hook from the user. Even in such a case, the connection can be maintained.

  In the present embodiment, a case is described in which a file is transferred according to the FTP protocol in the file transfer sequence. However, other file transfer protocols can be applied instead of the FTP protocol. For example, it is conceivable to transfer a file according to the HTTP protocol. When transferring a file in accordance with the HTTP protocol, “request-URI” is used as the file transmission request (transmission request command) shown in FIG. 5 (FIG. 6), and “command transmission request command” is “ “POST” may be used.

  Furthermore, it is conceivable to transfer a file according to the TFTP protocol as a file transfer protocol. Unlike the FTP protocol that uses TCP for the transport layer, the TFTP protocol uses UDP for the transport layer. For this reason, connection establishment is not performed prior to file transfer. As a result, overhead other than actual file transfer can be reduced, and efficient file transfer can be realized.

  In the above description, a case where a file in the memory card inserted into the card slot 307 is transferred during a call between the IP phone 101 and the IP phone 102 is shown. However, the present invention is not limited to this, and the present invention can also be applied to a case where a file in a memory card inserted into the card slot 307 is transferred before a call or a file in the internal memory 204 of the IP phone 101 is transferred. Needless to say, you can.

  In the IP telephone system according to the present embodiment, the case where the IP telephone exists as a single device has been described, but the present invention is not limited to this. In other words, an IP telephone may be configured by connecting a normal telephone device to a control adapter having a function of causing the connected normal telephone device to function as an IP telephone. Note that a normal telephone device refers to a telephone device that does not have a function of making a voice call via the IP network 104.

  In the IP telephone system according to the present embodiment, the IP telephone is described as an apparatus for voice call, but it may be an IP videophone that transmits and receives not only voice but also video in two-way real time.

  Further, although the IP telephone system according to the present embodiment includes the display unit in the IP telephone, a configuration in which the display unit is separated may be employed.

  In addition, in the IP telephone system according to the present embodiment, during the file transfer, the call control sequence of the call is not disconnected, and the transmission of voice packets for the call is stopped to concentrate the data transmission for the file transfer. To reduce the communication traffic with the other party and increase the efficiency of file transfer.

  Further, in the file transfer of the IP telephone system according to the present embodiment, the content of the file is not limited to image data, and may be a file having an arbitrary content.

  Further, in the IP telephone system according to the present embodiment, a case has been described in which file transfer is performed after the callee is off-hooked and the call is connected, but by providing an automatic response function, even when the callee is absent, The SIP protocol call control may be established so that the file can be transmitted.

  The IP phone in the above description includes an IP phone defined by the Ministry of Internal Affairs and Communications and operated by a telecommunications carrier, and one realized by a network using a computer communication protocol such as TCP / IP in a local network or a private network.

  According to the IP telephone system, IP telephone apparatus, and file transfer method according to the present invention, it is possible to perform file transfer after performing call control with a destination IP telephone apparatus, and to provide an IP telephone system that is more convenient. It is useful in that it can be provided.

The figure which shows the structure of the network with which the IP telephone system which concerns on one embodiment of this invention is applied. Block diagram showing a schematic configuration of an IP phone constituting the IP phone system according to the above embodiment Front view showing appearance of IP phone according to the above embodiment Sequence diagram for explaining an operation until a call is made between IP phones and an image data file is transferred during the call in the IP phone system according to the above embodiment Sequence diagram for explaining an example of the file transfer sequence shown in FIG. Sequence diagram for explaining an example of the file transfer sequence shown in FIG. FIG. 4 and FIG. 5 (FIG. 6) are flowcharts for explaining the operation of the IP telephone on the caller side in the sequence shown in FIG. FIG. 4 and FIG. 5 (FIG. 6) are flowcharts for explaining the operation of the destination IP phone in the sequence shown in FIG.

Explanation of symbols

101, 102 IP telephone device (IP telephone)
103 CA
DESCRIPTION OF SYMBOLS 104 IP network 201 IP telephone control part 202 File transmission / reception part 203 Display part 204 Internal memory 205 External memory

Claims (9)

An IP telephone system comprising: an IP telephone apparatus connected to an IP network and having a voice call function; and a server apparatus that registers information related to the IP telephone apparatus and responds to the registration information in response to a request from the IP telephone apparatus Then, when receiving the voice call instruction, the originating IP telephone device performs call processing using the registration information of the called IP phone device acquired from the server device by call control processing , and Upon receiving a file transfer instruction during a voice call with the IP telephone device, the file transfer to the called IP phone device is started using the registration information of the called IP phone device obtained by the call control process. If the call termination instruction is received before the file transfer is completed, the connection established with the IP telephone device on the called side is terminated until the file transfer is completed. IP telephone system and maintains the Deployment. Claim wherein the IP telephone apparatus on the call originating side, when the file transfer is received the instruction of call ends after the end, characterized in that the cutting of the connection established between the destination IP telephone apparatus 1. The IP telephone system according to 1.   The originating IP telephone device transmits transmission control information for specifying the number of data packets to be transmitted collectively to the terminating IP phone device before starting the file transfer. 2. The IP telephone system according to claim 1, wherein data is transmitted collectively until the number of packets is reached. An IP telephone apparatus that registers information related to an IP telephone apparatus and connects to a server apparatus that responds to the registration information in response to a request from the IP telephone apparatus, for performing a voice call with another IP telephone apparatus on the IP network An IP telephone control unit that performs call processing using the registration information of another IP telephone device acquired from the server device by the call control processing, and another IP telephone device acquired by call control processing by the IP telephone control unit. A file transfer unit that transfers the file to the other IP telephone device using the registration information, and the IP phone control unit performs the file transfer by the file transfer unit during a voice call with the other IP phone device. When the transfer is started and an instruction to terminate the call is received before the file transfer is completed, the other IP telephone apparatus is connected until the file transfer is completed. IP telephone apparatus characterized by maintaining a connection established between. The IP telephone control unit disconnects a connection established with the other IP telephone device when receiving an instruction to end a call after the file transfer by the file transfer unit is completed. The IP telephone apparatus according to claim 4 . The IP telephone control unit transmits transmission control information designating the quantity of data packets transmitted together to the other IP telephone apparatus before starting the file transfer. At the time of file transfer, the quantity of the data packet 5. The IP telephone apparatus according to claim 4, wherein data is transmitted collectively until reaching. Perform call processing by using the registration information of the other IP telephone apparatus acquired by the call control processing for performing other IP telephone apparatus and voice communication over IP networks, during a voice call with the other IP telephone device When a file transfer instruction is received, a file transfer is started using the registration information of the other IP telephone device acquired by the call control process, and a call end instruction is received before the file transfer ends A file transfer method characterized in that a connection established with the other IP telephone apparatus is maintained until the file transfer is completed . When receiving an instruction to call ends after completion of the file transfer to the other IP telephone apparatus according to claim 7, wherein the cutting the connection established between the other IP telephone device File transfer method. Before transferring the file to the other IP telephone apparatus, transmission control information for specifying the quantity of data packets to be transmitted together is transmitted to the other IP telephone apparatus. 8. The file transfer method according to claim 7, wherein the data is transmitted collectively until reaching.

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