JP2007201563A - Proxy server, control method of proxy server, and control program for proxy server - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a proxy server capable of identifying an application, and performing a signaling processing corresponding to each application. <P>SOLUTION: An identification information acquisition section 103 acquires identification information of an application on the basis of the identification information of the application received by a communication section 102 and a message on a request line of which the SIP URI including the identification information of the application is described. A memory 101 stores he identification information of the application and processing to be executed when receiving the identification information of the application in cross reference with each other, and a processing execution section 104 reads the processing corresponding to the identification information of the application acquired by the identification information acquisition section 103 from the memory 101 and executes the processing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a proxy server, a proxy server control method, and a proxy server control program, and in particular, can receive a message including application identification information in a SIP URI and control communication between communication terminals. The present invention relates to a proxy server, a proxy server control method, and a proxy server control program.

  Conventionally, SIP (Session Initiation Protocol) has been used to establish and control two-way voice communication between two communication terminals (SIP-UA: User Agent, hereinafter referred to as UA) (for example, non-instruction). (See Patent Document 1). The SIP proxy server is a server that relays transmission / reception of communication messages between two UAs. The relationship of data transmission / reception between UAs controlled by SIP is called “session”, and control of communication performed at this time is called “signaling”. As described above, voice data is representative of data transmitted and received in communication established according to SIP. Originally, SIP is a general-purpose protocol for controlling a session between two UAs and is a target of communication. Data is not limited to voice. That is, the data to be transmitted / received may be video data, data for remote control of a communication device, or data for VPN (Virtual Private Network) connection.

  In SIP, a method is used in which a voice / video codec, a transport layer protocol, and the like used in a session are described using SDP (Session Description Protocol), and communication contents used by UAs are mutually identified (for example, non-description). (See Patent Document 2). However, since SDP has insufficient description capability to specify communication in which data other than audio / video is transmitted / received, details of communication contents are required when data other than audio / video is subject to communication. There is a problem that cannot be identified. A specific type of session determined by the details of communication contents is called an “application” on the UA.

For example, in applications such as home appliance remote control and video recording reservation, communication using HTTP (Hyper Text Transfer Protocol) is performed, but parameters such as contents and format of information exchanged over HTTP are controlled by home appliance remote control. And video recording reservation are different. However, when these two communications are controlled using a combination of SIP and SDP, SDP does not allow detailed description beyond that communications are performed using HTTP. It was not possible to distinguish. For this reason, the SIP proxy server cannot perform different signaling processes for home appliance remote control and video recording reservation (see Non-Patent Document 3, for example).
RFC3261, Rosenberg, J. et al. Schulzrinne, H .; , Camarillo, G .; , Johnston, A .; Peterson, J .; , Sparks, R .; , Handley, M .; and E.E. Schooler, “SIP: Session Initiation Protocol”, Internet Engineering Task Force (IETF), June 2002. RFC 2327, Handley, M .; and V.A. Jacobson, “SDP: Session Description Protocol”, Internet Engineering Task Force (IETF), April 1998. RFC 3264, Rosenberg, J. et al. and H. Schulzrinne, “An Offer / Answer Model with the Session Description Protocol (SDP)”, Internet Engineering Task Force (IETF), June 2002.

  As described above, in the method of identifying an application by combining SIP and SDP, there is a case where the application cannot be identified because the application description capability of SDP is insufficient. Therefore, there is a problem that the SIP proxy server cannot perform signaling processing corresponding to each application.

  The present invention has been made in order to solve the above-described problems of the prior art, and it is possible to identify an application in a proxy server and perform a signaling process corresponding to each application. It is an object to provide a control method and a proxy server control program.

  To achieve the above object, the proxy server of the present invention includes a first communication terminal and a second communication terminal that establish communication using SIP (Session Initiation Protocol), and the first and second communication. A proxy server that can be connected to a location server that stores the SIP addresses of the terminals in association with the IP addresses of those communication terminals, and includes a SIP URI (Uniform Resource Identifier) that includes the application identification information and the application identification information. Storage means for associating and storing processing to be performed when a message described in the request line is received, identification information of the first application and SIP address of the second communication terminal from the first communication terminal Including SI Means for receiving a first message in which a P URI is described in the request line; identification information obtaining means for obtaining identification information of the first application from the received first message; A process execution unit that reads and executes a process corresponding to application identification information from the storage unit; a SIP address acquisition unit that acquires a SIP address of the second communication terminal from the received first message; Using the IP address acquisition means for acquiring the IP address of the second communication terminal corresponding to the SIP address of the second communication terminal from the location server, and using the acquired IP address of the second communication terminal. Transmission means for transmitting the first message to two communication terminals.

  In addition, the proxy server control method of the present invention includes a first communication terminal and a second communication terminal that establish communication using SIP (Session Initiation Protocol), and SIPs of the first and second communication terminals. A method for controlling a proxy server connectable to a location server that stores an address in association with an IP address of those communication terminals, wherein the first communication terminal receives identification information of the first application and the second SIP URI (Uniform Resource Identifier) including the SIP address of the communication terminal is received in the first message described in the request line, and the identification information of the first application is acquired from the received first message, Application identification information and its The processing corresponding to the acquired first application identification information is read out from the storage means for storing the processing performed when the SIP URI including the application identification information is received in response to the message described in the request line. The SIP address of the second communication terminal is acquired from the received first message, and the IP address of the second communication terminal corresponding to the acquired SIP address of the second communication terminal is acquired from the location server. And transmitting the first message to the second communication terminal using the acquired IP address of the second communication terminal.

  The proxy server control program according to the present invention includes a first communication terminal and a second communication terminal that establish communication using SIP (Session Initiation Protocol), and SIPs of the first and second communication terminals. A proxy server control program connectable to a location server that stores an address in association with the IP address of the communication terminal, the computer from the first communication terminal, the identification information of the first application and the SIP URI (Uniform Resource Identifier) including the SIP address of the second communication terminal receives the first message described in the request line, and identification of the first application from the received first message Get information The first application acquired from the storage means for storing the function to be associated with the processing performed when the identification information of the application and the SIP URI including the identification information of the application receive the message described in the request line. A function for reading and executing a process corresponding to the identification information of the user, a function for acquiring the SIP address of the second communication terminal from the received first message, and a SIP address of the acquired second communication terminal. The first message is transmitted to the second communication terminal by using the function of acquiring the corresponding IP address of the second communication terminal from the location server and the acquired IP address of the second communication terminal. It is characterized by realizing functions.

  According to the proxy server according to the embodiment of the present invention, a message including application identification information included in the destination SIP URI is received, and the application identification information is acquired from the SIP URI to perform signaling processing for each application. It becomes possible.

  Hereinafter, embodiments of the present invention will be described.

(First embodiment)
FIG. 1 is a block diagram showing a SIP proxy server 100 according to the first embodiment of the present invention.

  The SIP proxy server 100 according to the first embodiment stores the application identification information in association with the processing to be performed when the SIP URI including the application identification information is received in the message described in the request line. A memory 101, a communication unit 102 that transmits and receives data to and from other communication terminals and servers via a network, an identification information acquisition unit 103 that acquires application identification information from a message received by the communication unit 102, and identification information A process execution unit 104 that reads and executes processing corresponding to the application identification information acquired by the acquisition unit 103 from the memory 101, and a SIP that acquires the SIP address of the communication terminal to be communicated from the message received by the communication unit 102 Address acquisition unit 105 and SIP address The IP address corresponding to the SIP address acquired in less acquisition unit 105, and an IP address acquisition unit 106 for acquiring from the location server through the communication unit 102.

  FIG. 2 is a diagram illustrating a configuration of a network system including the SIP proxy server 100 according to the first embodiment.

  The SIP proxy server 100 is connected to UA1 (200) and UA2 (300), which are communication terminals (user agents, hereinafter referred to as UA), and a location server 400 via a network.

  Hereinafter, a method for registering the association between the SIP addresses of UA1 and UA2 and the IP address in the location server 400 will be described first.

  When UA1 and UA2 are activated, these communication terminals first perform REGISTER processing. Specifically, a REGISTER request including the SIP address and IP address of these communication terminals is transmitted to a registration server (registrar, not shown in FIG. 2). The registration server transmits the received SIP address and IP address to the location server 400, and the location server 400 stores the SIP address and the IP address in association with each other. In this way, the location server 400 stores the SIP addresses and IP addresses of UA1 and UA2 in association with each other, so that the location server 400 can receive a specific SIP in response to an inquiry from the SIP proxy server 100. An IP address corresponding to the address can be answered.

  Next, the operation of the SIP proxy server 100 when a message requesting establishment of communication is transmitted from the UA 1 to the UA 2 via the SIP proxy server 100 will be described using FIG. 1, FIG. 2, and FIG. . FIG. 3 is a flowchart showing the operation of the SIP proxy server 100 in the first embodiment.

  First, an application operating on the UA 1 generates an INVITE message for requesting establishment of communication to the UA 2 and transmits it to the SIP proxy server 100. At this time, the application operating on the UA1 describes a SIP URI including identification information for identifying the application and the SIP address of the UA2 in the request line.

  FIG. 4 is an example of a header of an INVITE message generated by UA1. In the header of the INVITE message shown in FIG. 4, the SIP URI described in the request line includes the SIP address “sip: bob@1048.co.jp” of UA2 and application identification information “voip”. Here, the application identification information “voip” shown in FIG. 4 represents the identification information of the application requesting the voice call from UA1 to UA2.

  Note that the application identification information and the SIP address description method in the SIP URI are preliminarily agreed with the UA1, the SIP proxy server 100, and the UA2 that transmit and receive messages in advance. The identification information is described in the forefront part (immediately after “@”) of the host part of the SIP address. However, the description method of the application identification information and the SIP address is not limited to such a method. For example, as shown in FIG. 5, the application identification information is placed at the end of the user name (immediately before “@”). , “-” May be inserted for description. Also, application identification information may be divided and inserted into the user name and host name of the SIP address. Further, for example, supplementary information for the application identification information such as the application version can be inserted into the parameter portion of the SIP URI as shown in FIG.

  The INVITE message thus generated and transmitted by UA1 is received by the communication unit 102 of the SIP proxy server 100 (step S101).

  The INVITE message received by the communication unit 102 of the SIP proxy server 100 is then sent to the identification information acquisition unit 103, and the identification information acquisition unit 103 acquires the application identification information from the SIP URI of the INVITE message (step S102). ). In the example of FIG. 4 described above, the identification information acquisition unit 103 acquires the application identification information “voip” from the SIP URI.

  When the identification information acquisition unit 103 acquires the application identification information, the process execution unit 104 next reads out and executes the process corresponding to the application identification information from the memory 101 (step S103).

  Here, it is assumed that the memory 101 stores the application identification information and the processing when a message including the application identification information is received in association with each other.

  For example, if the IP address of UA2 cannot be acquired in the process of acquiring the IP address of UA2, which will be described later, a server that exists on the network and has a function of storing a message (for example, a server that provides a voice mail service) (Not shown in FIG. 2), the process of transferring the received INVITE message is stored in the memory 101 in association with the application identification information “voip”. When the IP address acquisition unit 106 cannot actually acquire the IP address of the UA 2, control is performed so that the received INVITE message is transferred to the server through the communication unit 102.

  Apart from this, for example, when the IP address of UA2 could not be acquired in the process of acquiring the identification information “pvr” of the application that controls video reservation from UA1 to UA2 and the IP address of UA2, The “Not Found” response is stored in the memory 101 in association with the process of returning the response to the UA 1. If the IP address acquisition unit 106 cannot actually acquire the IP address of UA2, the received INVITE message is discarded without being transferred, and “Not Found” is transmitted to the UA1 through the communication unit 102. Control to send a response.

  As described above, by storing the application identification information and the process when the message including the application identification information is received in association with the memory 101, the SIP proxy server 100 performs the signaling process corresponding to each application. Can be done.

  The INVITE message received by the communication unit of the SIP proxy server 100 is further sent to the SIP address acquisition unit 105. Then, the SIP address acquisition unit 105 acquires the SIP address of UA2 from the SIP URI of the INVITE message (step S104). In the example of FIG. 4 described above, the SIP address acquisition unit 105 acquires the SIP address “sip: bob@1048.co.jp” of UA2 from the SIP URI.

  The SIP address of UA 2 acquired by the SIP address acquisition unit 105 is then sent to the IP address acquisition unit 106. Then, the IP address acquisition unit 106 transmits a message for inquiring about the IP address corresponding to the SIP address of the UA 2 from the communication unit 102 to the location server 400 connected via the network (step S105).

  When the SIP address of UA2 is already registered in the location server 400 and the IP address of UA2 is stored in association with the SIP address, the location server 400 uses the stored IP address of UA2 as the SIP proxy. Send to server 100. On the other hand, if, for example, the UA2's SIP address and IP address are not stored in the location server 400, for example, because the UA2 has not yet started, the location server 400 sets the SIP address of the UA2 that has made the inquiry. A message indicating that the corresponding IP address cannot be acquired is transmitted to the SIP proxy server 100.

  The message transmitted from the location server 400 is received by the communication unit 102 and sent to the process execution unit 104 and the IP address acquisition unit 106.

  When the IP address of UA2 is included in the message transmitted from the location server 400, the IP address acquisition unit 106 transmits the INVITE message transmitted from UA1 to the UA2 using the IP address. (Step S106).

  By such processing, even when the identification information of the application is included in the SIP URI of the INVITE message transmitted from UA1, the INVITE message can be transmitted to UA2.

  On the other hand, when the message transmitted from the location server 400 is a message indicating that the IP address of UA2 cannot be acquired, as described above, the process execution unit 104 transmits the INVITE message transmitted from UA1 to the communication unit. The data is transmitted to the server that provides the voice mail service via 102.

  As described above, according to the SIP proxy server 100 according to the first embodiment of the present invention, a message in which the SIP URI including the identification information of the application and the SIP address of the UA to perform communication is described in the request line is received. Since the application identification information is acquired from the received message and processing corresponding to the application identification information is performed, different signaling processing can be performed for each application. Furthermore, since the SIP address of the UA to communicate with can be acquired from the received message, the corresponding IP address can be acquired from the location server and the message can be transferred.

  The operation for acquiring the identification information of the application from the SIP URI included in the received message and performing the processing corresponding to each acquired application is defined as an extended function in SIP, and the message from UA1 includes the extension. It is also possible for the SIP proxy server 100 to perform the above-described operation only when there is a notification that the function is to be used.

  For example, here, “app-in-uri” is defined as message transmission / reception using a SIP URI including application identification information, and the application identification information is inserted into the host part of the SIP address. This is defined as “app-in-host”. These “app-in-uri” and “app-in-host” are called option tags.

  When UA1 and UA2 perform REGISTER processing after activation, the SUP1 header and the Proxy-Request header in which these option tags are described are added to the REGISTER request. Here, the Supported header is a header used to indicate that UA1 and UA2 can use the extended function corresponding to the option tag described in the Supported header. On the other hand, the Proxy-Request header is used to request that the SIP proxy server 100 be requested to perform an operation required when using an extended function corresponding to the option tag described in the header. Header.

  When a REGISTER request in which these headers are described is received by the registration server, the registration server is included in the above-described Supported header and Proxy-Request header together with the SIP address and IP address of UA1 and UA2 included in the REGISTER request. The option tag information is also transmitted to the location server 400. Then, the location server 400 stores the information of these option tags in association with the transmitted SIP address and IP address.

  When the UA 1 transmits and receives a message using this extended function, an option tag corresponding to the extended function to be used is described in the Proxy-Require header of the message to be transmitted. Then, when the Proxy-Request header of the received message includes an option tag corresponding to the extended function, the SIP proxy server 100 performs an operation corresponding to this. In the above-described example, when the option tags “app-in-uri” and “app-in-host” are described in the Proxy-Request header, the identification information acquisition unit 103 is described in the received message. An operation of acquiring application identification information from the host part of the SIP address in the SIP URI is performed. On the other hand, when there is no description of the Proxy-Request header in the message, it can be determined that the SIP URI includes only the SIP address, so the operation of acquiring the identification information of the application by the identification information acquisition unit 103 is not performed. Perform normal message transfer processing.

  By doing so, the SIP proxy server can cope with both a message in which the identification information of the application is included in the SIP URI and a normal message not included in the SIP URI.

  Further, in the above-described embodiment, the embodiment in the case of transmitting the INVITE message requesting establishment of communication from UA1 to UA2 has been described. However, for example, presence information of UA2 is transmitted from UA1 to UA2. (For example, refer to RFC 3903, A. Niemi, “Session Initiation Protocol (SIP) Extension for Event State Publication”, Internet Engineering Task Force (IETF), B. Refer to C, B. Refer to C, B). Roach, “Session Initiation Protocol (SIP) -Specifi Also, in the case of transmitting “c Event Notification”, Internet Engineering Task Force (IETF), June 2002), the SIP proxy server 100 can perform different signaling processing depending on the application.

  That is, for example, when an application operating on the UA1 requests that the presence information of the UA2 be directly answered to the UA2, the UA1 uses the identification information of the application as shown in FIG. , “SUBSCRIBE” message including “direct” included in the SIP URI is generated and transmitted to the SIP proxy server 100. On the other hand, when requesting that the presence information of UA2 be answered not by UA2 but by a presence server (not shown in FIG. 2) that stores the presence information of the communication terminal, UA1 displays FIG. ), A SUBSCRIBE message in which “indirect” is included in the SIP URI as application identification information is generated and transmitted to the SIP proxy server 100.

  On the other hand, the SIP proxy server 100 stores in the memory 101 a process when receiving a message including the identification information “direct” or “indirect” of these applications in the SIP URI. Specifically, the application identification information “direct” and the process of transmitting the received message to the UA 2 are stored in association with each other. Further, the identification information “indirect” of the application and the process of transmitting the received message to the presence server are stored in the memory 101 in association with each other.

  Then, the identification information acquisition unit 103 of the SIP proxy server 100 acquires application identification information “direct” or “indirect” from the SIP URI of the received SUBSCRIBE message, and the process execution unit 104 corresponds to the identification information of the application. The processing to be performed is read from the memory 101 and executed. Specifically, when the application identification information is “direct”, the received SUBSCRIBE message is transmitted from the communication unit 102 to the UA 2, and when it is “indirect”, the received SUBSCRIBE message is transmitted to the communication unit 102. To the presence server. The UA2 or presence server that has received the SUBSCRIBE message transmits a NOTIFY message for the SUBSCRIBE message to the SIP proxy server 100, and the SIP proxy server 100 transfers the NOTIFY message to UA1.

  By doing so, the SIP proxy server 100 can change the transmission destination of the SUBSCRIBE message from the identification information of the application included in the SIP URI, and the UA1 receives the presence from the designated UA2 or presence server. Information can be acquired.

  In addition to this, for example, when network traffic increases due to a large amount of communication requests such as during a disaster or at the end of the year and the beginning of the year, the SIP proxy server 100 requests a communication request by a video phone or the like that consumes a lot of traffic. It is also possible to restrict traffic transmission / reception using the application identification information included in the SIP URI of the message and allow only voice calls with relatively little traffic to prevent an increase in traffic. . In this case, for example, identification information of an application that does not permit communication is stored in the memory 101, and if the identification information of the application acquired by the identification information acquisition unit 103 does not permit communication, the process is executed. A message indicating that communication is not permitted may be returned from the unit 104.

In the above-described embodiment, the processing performed when the application identification information and the SIP URI including the application identification information are described in the request line is associated with the memory 101 in the SIP proxy server 100. However, such an association may be stored in a storage server on the network. In this case, the process execution unit 104 sends a message inquiring about the process corresponding to the application identification information acquired by the identification information acquisition unit 103 to the storage server on the network via the communication unit 102, and answers from the storage server. What is necessary is just to perform the process which there was.

  The SIP proxy server 100 can also be realized by using, for example, a general-purpose computer device as basic hardware. That is, the identification information acquisition unit 103, the process execution unit 104, the SIP address acquisition unit 105, and the IP address acquisition unit 106 can be realized by causing a processor mounted on the computer device to execute a program. At this time, the SIP proxy server 100 may be realized by installing the above program in a computer device in advance, or may be stored in a storage medium such as a CD-ROM or distributed through the network. Then, this program may be realized by appropriately installing it in a computer device. The memory 101 can be realized by appropriately using a memory, a hard disk or a storage medium such as a CD-R, a CD-RW, a DVD-RAM, a DVD-R, or the like that is built in or externally attached to the computer device. it can.

(Second Embodiment)
In the first embodiment, the description method of the SIP URI in the request line of the message transmitted from the UA 1 has been described as having been agreed in advance between the UA 1, the UA 2, and the SIP proxy server 100. .

  In contrast, in the second embodiment, for example, a SIP URI description method is registered in the location server 400 for each UA, and the SIP proxy server acquires the description method registered in the location server 400. An embodiment in the case of acquiring application identification information and SIP address from the SIP URI will be described.

  FIG. 8 is a block diagram showing a SIP proxy server 1100 according to the second embodiment of the present invention.

  The SIP proxy server 1100 according to the second embodiment includes a description method acquisition unit 107 that acquires a SIP URI description method from the location server 400 in addition to the SIP proxy server 100 according to the first embodiment shown in FIG. And a description method conversion unit 108 for converting the description method of the SIP URI included in the received message.

  Therefore, in the following, detailed description of the parts (memory 101, process execution unit 104, IP address acquisition unit 106) that perform the same operations as in the first embodiment will be omitted.

  First, UA1 and UA2 transmit the SIP URI description method used by each in the REGISTER process to the registration server. The registration server transmits the received SIP URI description method to the location server 400 together with the SIP addresses and IP addresses of UA1 and UA2. The location server 400 stores the received information in association with each other. Note that the SIP URI description method may be defined as an option tag in the extended function of SIP, as described above, for example.

  Next, an application operating on the UA 1 generates an INVITE message requesting the UA 2 to establish communication, and transmits it to the SIP proxy server 1100.

  The INVITE message transmitted from the UA 1 is received by the communication unit 102 of the SIP proxy server 1100 and then sent to the description method acquisition unit 107.

  The description method acquisition unit 107 transmits a message inquiring about the description method of the SIP URIs of UA1 and UA2 from the communication unit 102 to the location server 400, and acquires these description methods. The identification information acquisition unit 103 and the SIP address acquisition unit 105 acquire application identification information and the SIP address of the UA 2 from the SIP URI of the received INVITE message based on the acquired description method.

  If the description method of the SIP URI of UA1 and UA2 acquired by the description method acquisition unit 107 is different, the description method conversion unit 108 changes the description method of the SIP URI of the received INVITE message to the description of the SIP URI of UA1. The method is converted to the description method of the SIP URI of UA2. For example, in the description method of the SIP URI of UA1, the identification information of the application is described at the beginning of the host part of the SIP address, whereas in UA2, when described at the end of the user name of the SIP address, The description method conversion unit 108 generates an INVITE message in which the SIP URI including the application identification information at the end of the user name of the SIP address is described in the request line.

  When the INVITE message in which the SIP URI description method is converted is generated by the description method conversion unit 108 in this manner, the message is transmitted to the UA 2 via the communication unit 102.

  As described above, according to the SIP proxy server 1100 according to the second embodiment of the present invention, even when a different SIP URI description method is used for each UA, the SIP proxy server 1100 converts the description method. Therefore, each UA can generate a message without being conscious of the description method of the SIP URI of the partner with whom communication is to be established.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

The block diagram which shows the structure of the SIP proxy server concerning the 1st Embodiment of this invention. The figure which shows the structure of the network system containing the SIP proxy server of the 1st Embodiment of this invention. The flowchart which shows the operation | movement of the 1st Embodiment of this invention. The figure which shows an example of the message which the SIP proxy server of the 1st Embodiment of this invention receives. The figure which shows an example of the message which the SIP proxy server of the 1st Embodiment of this invention receives. The figure which shows an example of the message which the SIP proxy server of the 1st Embodiment of this invention receives. The figure which shows an example of the message which the SIP proxy server of the 1st Embodiment of this invention receives. The block diagram which shows the structure of the SIP proxy server concerning the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100, 1100 ... SIP proxy server 101 ... Memory 102 ... Communication part 103 ... Identification information acquisition part 104 ... Processing execution part 105 ... SIP address acquisition part 106 ... IP address acquisition Unit 107 ... description method acquisition unit 108 ... description method conversion unit

Claims (9)

The first communication terminal and the second communication terminal that establish communication using SIP (Session Initiation Protocol), and the SIP addresses of the first and second communication terminals are associated with the IP addresses of the communication terminals. A proxy server that can connect to the location server
A storage unit that associates and stores application identification information and processing performed when a SIP URI (Uniform Resource Identifier) including the application identification information is received in a request line;
Means for receiving, from the first communication terminal, a first message in which a SIP URI including identification information of a first application and a SIP address of the second communication terminal is described in a request line;
Identification information acquisition means for acquiring identification information of the first application from the received first message;
A process execution unit that reads out and executes a process corresponding to the acquired identification information of the first application from the storage unit;
SIP address acquisition means for acquiring an SIP address of the second communication terminal from the received first message;
IP address acquisition means for acquiring an IP address of the second communication terminal corresponding to the acquired SIP address of the second communication terminal from the location server;
A proxy server comprising: a transmission unit configured to transmit the first message to the second communication terminal using the acquired IP address of the second communication terminal. The first communication terminal and the second communication terminal that establish communication using SIP (Session Initiation Protocol), and the SIP addresses of the first and second communication terminals are associated with the IP addresses of the communication terminals. The storage server that stores the association server, the identification information of the application, and the processing that is performed when a SIP URI (Uniform Resource Identifier) including the identification information of the application is received in the request line. A proxy server that can be connected to
Means for receiving, from the first communication terminal, a first message in which a SIP URI including identification information of a first application and a SIP address of the second communication terminal is described in a request line;
Identification information acquisition means for acquiring identification information of the first application from the received first message;
Processing execution means for reading out and executing processing corresponding to the acquired identification information of the first application from the storage server;
SIP address acquisition means for acquiring an SIP address of the second communication terminal from the received first message;
IP address acquisition means for acquiring an IP address of the second communication terminal corresponding to the acquired SIP address of the second communication terminal from the location server;
A proxy server comprising: a transmission unit configured to transmit the first message to the second communication terminal using the acquired IP address of the second communication terminal. Means for obtaining from the location server a first description method of a SIP URI in a request line of a message transmitted / received to / from the first communication terminal;
The identification information acquisition unit and the SIP address acquisition unit are configured to determine the identification information of the first application or the SIP of the second communication terminal from the first message based on the first description method acquired from the location server. The proxy server according to claim 1, wherein an address is acquired. Means for obtaining from the location server a second method of describing a SIP URI in a request line of a message transmitted / received to / from the second communication terminal;
Conversion means for converting a SIP URI description method in the request line of the first message into a second description method acquired from the location server;
3. The transmission device according to claim 1, wherein the transmission unit transmits, to the second communication terminal, a second message obtained by converting the SIP URI into the second description method by the conversion unit. Proxy server. The transmission means further has a function of transmitting the first message to a storage server that stores the message,
The storage means includes identification information of a second application that requests a voice call from the first communication terminal to the second communication terminal, and an IP address of the second communication terminal by the IP address acquisition means. And the first process for controlling the transmission means to transmit the first message to the storage server in association with the first message,
In the processing execution means, the identification information of the application acquired by the identification information acquisition means is identification information of the second application that requests a voice call from the first communication terminal to the second communication terminal. In this case, the proxy server according to claim 1, wherein the first process is read from the storage unit and executed. The transmission means further has a function of transmitting the first message to a presence server,
The storage means transmits identification information of a third application that requests the second communication terminal to update presence information from the first communication terminal and the first message to the presence server. And a second process for controlling the transmission means in association with each other,
The process execution means includes the identification information of the third application for which the identification information of the application acquired by the identification information acquisition means requests the second communication terminal to update presence information from the first communication terminal. 2. The proxy server according to claim 1, wherein the second process is read from the storage unit and executed. The storage means is configured to transmit the identification information of a fourth application and a message for refusing to transmit the first message to the second communication terminal to the first communication terminal. Storing the third process to be controlled in association with it,
The process execution means reads and executes the third process from the storage means when the identification information of the application acquired by the identification information acquisition means is the identification information of the fourth application. The proxy server according to claim 1. The first communication terminal and the second communication terminal that establish communication using SIP (Session Initiation Protocol), and the SIP addresses of the first and second communication terminals are associated with the IP addresses of the communication terminals. A proxy server control method that can be connected to a location server that stores
From the first communication terminal, receives a first message in which a SIP URI (Uniform Resource Identifier) including identification information of the first application and a SIP address of the second communication terminal is described in the request line;
Obtaining identification information of the first application from the received first message;
The identification information of the first application acquired from the storage means for storing the application identification information in association with the processing performed when the SIP URI including the identification information of the application receives a message described in the request line. Read and execute the corresponding process,
Obtaining a SIP address of the second communication terminal from the received first message;
Obtaining the IP address of the second communication terminal corresponding to the SIP address of the obtained second communication terminal from the location server;
The proxy server control method, wherein the first message is transmitted to the second communication terminal using the acquired IP address of the second communication terminal. The first communication terminal and the second communication terminal that establish communication using SIP (Session Initiation Protocol), and the SIP addresses of the first and second communication terminals are associated with the IP addresses of the communication terminals. A proxy server control program connectable to a location server for storing
On the computer,
A function of receiving, from the first communication terminal, a first message in which a SIP URI (Uniform Resource Identifier) including identification information of the first application and a SIP address of the second communication terminal is described in a request line When,
A function of obtaining identification information of the first application from the received first message;
The identification information of the first application acquired from the storage means for storing the application identification information and the processing performed when the SIP URI including the identification information of the application receives the message described in the request line in association with each other. A function to read and execute the corresponding process;
A function of obtaining a SIP address of the second communication terminal from the received first message;
A function of acquiring from the location server an IP address of the second communication terminal corresponding to the acquired SIP address of the second communication terminal;
And a function of transmitting the first message to the second communication terminal using the acquired IP address of the second communication terminal.

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