JP2006340076A - Sip service converting device and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To connect a plurality of SIP systems having different services from one another. <P>SOLUTION: An SIP service converting device 10 is equipped with an SIP (A) processor 13 for rendering the SIP service (A) of an SIP (A) network, an SIP processor 14 for rendering the SIP service (B) of an SIP (B) network, and a service regulator 15 for regulating both the SIP services with an association established in processing relationship between the SIP (A) processor 13 and the SIP (B) processor 14 according to contents stored in an association storage 16. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to SIP service conversion for connecting a first SIP system that performs a first SIP (Session Initiation Protocol) service and a second SIP system that performs a second SIP service different from the first SIP service. The present invention relates to a device and a SIP service conversion method.

  In recent years, SIP has been increasingly adopted as a signaling protocol for providing an IP (internet protocol) multimedia service. Conventionally, as a communication system compliant with this SIP, for example, there is a system disclosed in Patent Document 1 below.

JP 2002-152224 A

  SIP is relatively extensible and has various extended functions and various control functions. For this reason, in SIP, an extended function and a control function according to a user's request can be adopted. For this reason, a specific service performed in one SIP system may not be performed in another SIP system. In such a case, for example, even if one SIP system and another SIP system are connected to receive provision of a specific service, this specific service may not be received but communication may be hindered. There is a problem that there is.

  The present invention has been made paying attention to such a conventional problem, and a plurality of SIP systems having different services are connected to each other while ensuring communication between the SIP systems. It is an object of the present invention to provide a SIP service conversion device and a SIP service conversion method that can prevent a service from being degraded.

An invention relating to a SIP service conversion apparatus for solving the above problems
In a SIP service conversion apparatus that connects a first SIP system that performs a first SIP (Session Initiation Protocol) service and a second SIP system that performs a second SIP service different from the first SIP service,
First SIP processing means for executing a plurality of processes of the first SIP service;
Second SIP processing means for executing a plurality of processes of the second SIP service;
Correspondence in which the correspondence between each of the plurality of processes of the first SIP service or the execution procedure of the process and each of the plurality of processes of the second SIP service or the execution procedure of the process is stored Relationship storage means;
When a message is received from the first SIP system, it is determined which process or procedure in the second SIP service corresponds to the process or procedure for the message by using the stored contents of the correspondence storage means. The second SIP processing means is caused to execute the corresponding process or the corresponding procedure among the plurality of processes or the execution procedures in the second SIP service and / or a message is received from the second SIP system. And a process or procedure corresponding to the message corresponds to which process or procedure in the first SIP service, and a corresponding process or a plurality of processes or execution procedures in the first SIP service Service adjusting means for causing the first SIP processing means to execute a handling procedure.

Here, in the SIP service conversion device,
When the first SIP processing unit receives a specific message from the communication source side, the first SIP processing unit can execute a process 1a including a procedure for returning a response to the communication source side. When the specific message is sent to the process 1b including a procedure for receiving one or more responses from the communication destination side and a procedure for returning one or more responses to the communication destination side.
The service adjustment means mediates between the first SIP processing means and the second SIP processing means, and when the first SIP processing means receives the specific message, the processing in the second SIP service Among these, the processing including the specific message corresponds to the processing 1b, and the second SIP processing means sets the processing destination side in the processing 1b as the second SIP system side. 1b may be executed, and the first SIP processing unit may execute the process 1a with the communication source side in the process 1a as the first SIP system side.

In the SIP service conversion device,
When the first SIP processing means receives a specific message from the communication source side, the first SIP processing means includes a procedure for receiving one or more responses from the communication source side together with a procedure for performing one or more responses to the communication source side. When the second SIP processing means can execute the process 2b including a procedure for receiving a response from the communication destination side when the second SIP processing means sends the specific message to the communication destination side,
The service adjustment means mediates between the first SIP processing means and the second SIP processing means, and when the first SIP processing means receives the specific message, the processing in the second SIP service The processing including the specific message corresponds to the processing 2b, the communication destination side in the processing 2b is set as the second SIP system side, and the processing is performed by the second SIP processing means. 2b may be executed, and the first SIP processing unit may execute the process 2a with the communication source side in the process 2a as the first SIP system.

Another invention relating to a SIP service conversion apparatus for solving the above problems is as follows:
In a SIP service conversion apparatus that connects a first SIP system that performs a first SIP (Session Initiation Protocol) service and a second SIP system that performs a second SIP service different from the first SIP service,
First SIP processing means for executing a plurality of procedures of the first SIP service;
Second SIP processing means for executing a plurality of procedures of the second SIP service;
Among the procedures to be performed by the second SIP processing unit with respect to the procedures performed by the first SIP processing unit, it is defined in the first SIP service but not in the second SIP service. A storage means for storing a technique for converting into a procedure that can be realized in the second SIP system and can realize a service equivalent to the first SIP service, with respect to a non-specified procedure that is not defined;
When causing the second SIP processing means to execute the undefined procedure, the undefined procedure is converted into a procedure that can be understood by the second SIP system using the technique stored in the storage means. And a service adjustment means.

Still another invention relating to a SIP service conversion apparatus for solving the above problems is as follows:
In a SIP service conversion apparatus that connects a first SIP system that performs a first SIP (Session Initiation Protocol) service and a second SIP system that performs a second SIP service different from the first SIP service,
First SIP processing means for executing a plurality of procedures of the first SIP service;
Second SIP processing means for executing a plurality of procedures of the second SIP service;
Service adjustment means for coordinating execution of each procedure by the first SIP processing means and execution of each procedure by the second SIP processing means;
A procedure that the service coordinating unit should cause the first SIP processing unit to execute when receiving various messages from the first SIP system and / or the second SIP system; A storage unit storing a sequence in which a procedure to be executed by the second SIP processing unit and a procedure to be executed by the service adjustment unit itself are stored;
With
According to the sequence, the service adjustment unit causes the first SIP processing unit to execute a predetermined procedure, causes the second SIP processing unit to execute a predetermined procedure, and the service adjustment unit itself performs the predetermined procedure. It is characterized by performing.

Still another invention relating to a SIP service conversion apparatus for solving the above problems is as follows:
In a SIP service conversion apparatus that connects a first SIP system that performs a first SIP (Session Initiation Protocol) service and a second SIP system that performs a second SIP service different from the first SIP service,
First SIP processing means for executing a plurality of procedures of the first SIP service;
Second SIP processing means for executing a plurality of procedures of the second SIP service;
Service adjustment means for adjusting the first SIP service and the second SIP service,
The first SIP service includes a calling number non-notification service that does not cause the called party to output the calling party's calling number by adding a number indicating the calling party's calling number non-notification to the called party number,
The second SIP service includes a calling number notification service for outputting a calling number based on a SIP URL included in a SIP packet from the calling side. Does not include unnumbered services,
The service coordinating means includes, in a SIP packet from the first SIP system, a called party SIP that includes a called party number having a terminal in the second SIP system as a called party and a number indicating the calling party non-notification When the URL and the source SIP URL including the calling party's calling party number are included, the number indicating the non-notification of the calling party number in the called party SIP URL is deleted, and the sender side SIP URL The calling party number is deleted or converted into another character or symbol.

The invention relating to the SIP service conversion method for solving the above-mentioned problems is as follows:
In a SIP service conversion method for connecting a first SIP system that performs a first SIP (Session Initiation Protocol) service and a second SIP system that performs a second SIP service different from the first SIP service,
A first SIP processing step of performing a plurality of processes of the first SIP service;
A second SIP processing step of performing a plurality of processes of the second SIP service;
Correspondence storage means for storing the correspondence between each of the plurality of processes of the first SIP service and each of the plurality of processes of the second SIP service;
When a message is received from the first SIP system, it is checked which process in the second SIP service the process including the message corresponds to, and among the plurality of processes in the second SIP service When the second SIP processing means is caused to execute a corresponding process and / or a message is received from the second SIP system, which process in the first SIP service corresponds to the process including the message And a service adjustment step of causing the first SIP processing means to execute a corresponding process among a plurality of processes in the first SIP service.

  According to the present invention, the process in the first SIP system that performs the first SIP service or the execution procedure of the process, and the process in the second SIP system that performs the second SIP service or the execution procedure of the process And the message from the first SIP system is changed to a process or procedure corresponding to the second SIP system, and the message from the second SIP system is changed to the first Therefore, it is possible to prevent a decrease in service in each SIP system while securing communication between the SIP systems.

  Hereinafter, embodiments of a SIP service conversion apparatus according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the SIP service conversion apparatus 10 according to the first embodiment of the present invention provides an IP telephone service (hereinafter referred to as SIP (A) service) according to call connection control based on the first SIP. An SIP (A) -based SIP (A) network to be executed and a SIP that executes an IP telephone service (hereinafter referred to as SIP (B) service) according to call connection control based on a second SIP different from the first SIP. (B) A system SIP (B) network is connected. The SIP (A) network that performs call connection control based on the first SIP is provided with a SIP (A) terminal 4, and the SIP server 2 performs call connection control based on the first SIP in the SIP (B) network. And a SIP (B) terminal 3 is provided.

  The SIP service conversion apparatus 10 includes a LAN interface control unit 11 that performs connection control with the SIP (A) network and the SIP (B) network, which are LAN networks, and a SIP protocol processing unit that performs SIP protocol control. 12, SIP (A) processing unit 13 for processing SIP service (A), SIP (B) processing unit 14 for processing SIP service (B), each of a plurality of procedures of SIP service (A) and SIP (B) Correspondence relationship storage unit 16 in which the correspondence relationship with each of a plurality of procedures of the service is stored, and the processing procedure in the SIP (A) service using the correspondence relationship stored in the correspondence relationship storage unit 16 And the service adjustment unit 15 for adjusting the processing procedure in the SIP service (B), the address authentication table 17, the location information table 18, and the call connection information It has a Buru 19, a. In this case, the SIP protocol processing unit 12 is independent from the SIP (A) processing unit 13 and the SIP (B) processing unit 14 in terms of software. The SIP (A) processing unit 13 executes a part of the processing of the SIP protocol processing unit 12, and the SIP (B) processing unit 14 performs the remaining part of the processing of the SIP protocol processing unit 12. If executed, it can be considered that there is no independent SIP protocol processing unit 12 for the SIP (A) processing unit 13 and the SIP (B) processing unit 14.

  As shown in FIG. 3, the SIP service conversion apparatus 10 includes a CPU 20 that executes various processes, a program memory 21 that stores programs executed by the CPU 20, and various data. A data memory 22 and a LAN interface unit 23. The program memory 21 stores a SIP protocol processing program, a SIP (A) processing program, a SIP (B) processing program, a service adjustment program, a LAN interface control program, and the like. Further, the data memory 22 stores an address authentication table 17, a position information table 18, a call connection information table 19, other configuration information, a service correspondence relationship, and the like. Note that the LAN interface control unit 11 which is a software component includes a LAN interface unit 23, a CPU 20, and a program memory 21 in which a LAN interface control program is stored. In addition, the SIP protocol processing unit 12, the SIP (A) processing unit 13, the SIP (B) processing unit 14, and the service adjustment unit 15 all have the CPU 20, the SIP protocol processing program, the SIP (A) processing program, and the SIP ( B) A program memory 21 in which processing programs and service adjustment programs are stored.

  As shown in FIG. 4, the address authentication table 17 includes a telephone number column in which a telephone number is registered and a user name as authentication information on each of the SIP (A) network side 17a and the SIP (B) network side 17b. There are an authentication user field to be registered and an authentication password field to register a password as authentication information. In this example, for the SIP (A) terminal, the telephone number in the SIP (A) network is different from the telephone number in the SIP (B) network. Also good.

  As shown in FIG. 5, the location information table 18 is registered with a telephone number column in which a telephone number on the SIP (A) network side is registered, an IP address column in which an IP address is registered, and a call control port number. There is a port number column.

  The call connection information table 19 includes a telephone number column in which a telephone number on the SIP (A) network side is registered, an arrival / departure state column indicating an arrival / departure state, and a location information presence / absence column indicating whether location information is registered. is there.

  In each of the above tables 17, 18, and 19, a telephone number is used as a terminal identification symbol. Instead of this telephone number, a SIP URL (Uniform Resource) in which the telephone number is changed according to a predetermined rule. (Locator) may be used.

  Next, the REGISTER authentication process in the SIP service conversion apparatus 10 will be described with reference to the flowchart shown in FIG.

  Suppose that the SIP (A) network side requires an authentication process for the REGISTER process, and the SIP (B) network side requires no authentication process for the REGISTER process. In this case, when the SIP protocol processing unit 12 receives the REGISTER message from the SIP (A) network side (S10), the service adjustment unit 15 refers to the correspondence storage unit 16 and refers to the REGISTER on the SIP (A) network side. It is understood that the processing procedure corresponds to the REGISTER processing procedure on the SIP (B) network side, and that the REGISTER processing on the SIP (A) network side is accompanied by an authentication process (S11). Then, as will be described below, the service adjustment unit 15 causes the SIP (A) network side to execute the REGISTER processing procedure in the SIP (A) network and the authentication processing procedure associated therewith, and SIP (B) The REGISTER processing procedure in the SIP (B) network is executed for the network side.

Here, in the correspondence storage unit 16, for example,
(1) In response to a REGISTER message from the SIP (A) network side, the SIP (A) network side causes the SIP (A) network to execute the REGISTER process and the accompanying authentication process, and the SIP (B) network side (2) A SIP (A) terminal that is separately required for adjusting the correspondence between networks, for example, a pre-processing in step 20 described later. (3) Authenticated REGISTER message and SIP (B) network on the SIP (A) network side Passing the authentication user name and authentication password on the SIP (B) network side to the SIP (B) processing unit 14 corresponding to the telephone number It is stored that the REGISTER message on the side corresponds to the 200 OK on the SIP (A) network side and the 200 OK on the SIP (B) side. As described above, the correspondence relationship storage unit 16 may individually store the procedure correspondence relationship between networks, but the SIP (A) processing unit 13 and the SIP (B) processing unit 14 The procedure to be executed and the procedure executed by the service adjustment unit 15 itself may be stored in sequence as shown in FIG. 7, for example.

  Subsequently, the service adjustment unit 15 determines whether or not authentication processing is necessary for the REGISTER message received in Step 10 (S12). In this case, as described above, since the authentication process is necessary for the REGISTER message, this message is passed to the SIP (A) processing unit 13 where the authentication determination is executed (S13). The SIP (A) processing unit 13 determines whether or not the message can be authenticated (S14). If the message cannot be authenticated, the SIP (A) processing unit 13 transmits an authentication request (401) to the SIP (A) terminal (S15). If the authentication is successful, the REGISTER update timer is started, and the process proceeds to step 16. Note that when this timer expires, the SIP (A) processing unit 13 erases the stored authentication information of the terminal. In response to the transmission of the authentication request from the SIP (A) processing unit 13 (S15), when a REGISTER message including authentication information is received from the SIP (A) terminal (S10), the process of step 16 is performed through steps 11-14. Will proceed to. Note that the authentication information here is the authentication user name and authentication password of the SIP (A) terminal in the address authentication table 17 as described above with reference to FIG.

  In step 16, the SIP (A) processing unit 13 registers REGISTER information (telephone number, IP address, and port number) included in the REGISTER message in the location information table 18 and the call connection information table 19. When the location information is registered in the location information table 18 or the like, the SIP (B) processing unit 14 transmits a REGISTER message to the server 2 of the SIP (B) network in response to an instruction from the service adjustment unit 15 (S18). As shown in the address authentication table 17 (FIG. 4), the terminal-side telephone number differs between the SIP (A) network side and the SIP (B) network side, so the SIP URL of the terminal included in this REGISTER message However, the SIP (A) network side and the SIP (B) network side are different. Therefore, the service adjustment unit 15 refers to the address authentication table 17, changes the SIP URL, and notifies the SIP (B) processing unit 14 of the changed SIP URL.

  When the REGISTER message is transmitted, the service adjustment unit 15 waits for a response from the SIP (B) network side (S19). When this response is 200 OK and the transmission result (OK), the SIP (B) processing unit 14 starts the REGISTER update timer whose expiration time is the period from when the server 2 stores the authentication information until it is deleted. This is notified to the SIP (A) processing unit 13 (S21). Note that the timer is used to periodically transmit a REGISTER message before the server 2 deletes the authentication information. If the response to the REGISTER message is a request (4xx) or the like and a transmission result (NG), the SIP (A) processing unit 13 is notified of this (S23). The SIP (A) processing unit 13 that has received the notification in steps 21 and 22 transmits the REGISTER result to the SIP (A) terminal (S22), and ends the REGISTER process.

  Also, if the SIP (A) network side requires no authentication process for the REGISTER process and the SIP (B) network side requires an authentication process for the REGISTER process, the SIP (A) network side sends a REGISTER message. Upon reception (S10), the service adjustment unit 15 grasps the correspondence between the processing procedure on the SIP (A) network side and the processing procedure on the SIP (B) network side (S11), and then performs SIP (A) processing. It is determined whether or not authentication processing in the unit 13 is necessary (S12). In this case, since the authentication process is unnecessary, the process in step 16 described above is immediately executed.

  Thereafter, a REGISTER message is transmitted (S18), and the service adjustment unit 15 waits for a response to this message (S19). If the response from the SIP (B) network side is the first authentication request (401), the service adjustment unit 15 refers to the address authentication table 17 and refers to the SIP (A) terminal corresponding to the telephone number. (B) The network-side authentication user name and authentication password are passed to the SIP (B) processing unit 14, and the SIP (B) processing unit 14 is caused to transmit a REGISTER message with authentication information added to the server 2 (S20). If this response is 200 OK and the transmission result (OK), and if this response is the second authentication request (401) or some request (4xx) or the like (NG), this is indicated by SIP. (A) The processing unit 13 is notified (S21, S23). Upon receiving this notification, the SIP (A) processing unit 13 transmits the REGISTER result to the SIP (A) terminal (S22), and ends the REGISTER process.

  Next, the exchange of messages and the like between the SIP (A) network and the SIP (B) network in the REGISTER process described above will be described using a sequence diagram.

  First, the case where the authentication process is necessary for the REGISTER process on the SIP (A) network side and the authentication process is not necessary for the REGISTER process on the SIP (B) network side will be described with reference to FIG. In addition, <> indicates the corresponding steps in the flowchart of FIG. 7.

  When a REGISTER message is transmitted from the SIP (A) terminal 4 and the SIP service conversion apparatus 10 receives this message (S100 <S10>), the authentication process cannot be performed although the REGISTER process requires the authentication process. (A) An authentication request (401) is transmitted to the terminal 4 (S101 <S15>). In response to this authentication request (401), the SIP (A) terminal 4 transmits a REGISTER message to which authentication information is added. Upon receiving this (S102 <S10>), the SIP service conversion device 10 performs an authentication process. If the authentication information is authentic, the SIP service conversion device 10 registers the REGISTER information included in the REGISTER message, and then SIP (B ) A REGISTER message is transmitted to the server 2 of the network (S103 <S18>). When the server 2 receives this message and completes the REGISTER process for the SIP (A) terminal, the server 2 transmits 200 OK to the SIP (A) network side. Upon receiving this 200 OK (S104 <S19>), the SIP service conversion apparatus 10 transmits 200 OK to the SIP (A) terminal 4 informing that the REGISTER process has been completed (S105 <S22>).

  Next, the case where the authentication process is unnecessary for the REGISTER process on the SIP (A) network side and the authentication process is necessary for the REGISTER process on the SIP (B) network side will be described with reference to FIG.

  When the REGISTER message is transmitted from the SIP (A) terminal 4 and is received by the SIP service conversion apparatus 10 (S110 <S10>), the authentication process is not required for accepting this message. The REGISTER message is transmitted to the server 2 (S111 <S18>). In the SIP (B) network, the authentication process is required for the REGISTER process, so the server 2 returns an authentication request (401) as a response to this message. Upon receiving this authentication request (401) (S112 <S19>), the SIP service conversion apparatus 10 transmits a REGISTER message with authentication information added to the server 2 (S113 <S20>). Upon receiving this, the server 2 performs an authentication process. If the authentication information is authentic, the server 2 registers the REGISTER information included in the REGISTER message, and then transmits 200 OK to the SIP (A) network side. Upon receiving this 200 OK (S114 <S19>), the SIP service conversion apparatus 10 transmits 200 OK to the SIP (A) terminal 4 informing that the REGISTER process has been completed (S115 <S22>).

  From the sequence diagrams shown in FIG. 9 and FIG. 10, the role sharing of the SIP (A) processing unit 13, the SIP (B) processing unit 14, and the service adjustment unit 15 of the SIP service conversion apparatus 10 can be well understood. As described above, when the service adjustment unit 15 receives a message from either the SIP (A) network or SIP (B), the service adjustment unit 15 performs processing to be performed by the SIP (A) processing unit 13 and SIP (B) processing. The correspondence relationship with the processing to be performed by the unit 14 is grasped, and the processing units 13 and 14 execute the corresponding processing and the corresponding procedure for executing the corresponding processing, and the SIP (A) processing unit 13 and the SIP (B) The processing performed by the processing unit 14 and processing for bridging the procedure are executed. On the other hand, both the SIP (A) processing unit 13 and the SIP (B) processing unit 14 are predetermined in order to execute a service defined in each network in accordance with an instruction from the service adjustment unit 15. Just follow the steps.

  Next, calling processing in the SIP service conversion apparatus 10 will be described with reference to the flowchart shown in FIG.

  Assume that the SIP (A) network side requires authentication processing for call processing, and the SIP (B) network side does not require authentication processing for call processing. In this case, when the SIP protocol processing unit 12 receives the INVITE message from the SIP (A) network side (S30), the service adjustment unit 15 refers to the correspondence storage unit 16 and refers to the INVITE on the SIP (A) network side. It is understood that the processing procedure corresponds to the INVITE processing procedure on the SIP (B) network side, and that the INVITE processing on the SIP (A) network side is accompanied by an authentication process (S31). Then, as will be described below, the service adjustment unit 15 causes the SIP (A) network side to execute the INVITE processing procedure in the SIP (A) network and the authentication processing procedure associated therewith, and SIP (B) The network side is caused to execute the INVITE processing procedure in the SIP (B) network.

  Subsequently, the service adjustment unit 15 determines whether authentication processing is necessary for the INVITE message received in Step 30 (S32). In this case, as described above, since the authentication process is required for the INVITE message, this message is passed to the SIP (A) processing unit 13 to execute the authentication determination (S33). The SIP (A) processing unit 13 determines whether or not the message can be authenticated (S34). If the message cannot be authenticated, the SIP (A) processing unit 13 transmits an authentication request (407) to the SIP (A) terminal (S35). If the authentication is successful, the process proceeds to step 36. In response to the transmission of the authentication request from the SIP (A) processing unit 13 (S15), when a REGISTER message including authentication information is received from the SIP (A) terminal (S30), the process of step 36 is performed through steps 31 to 34. Will proceed to.

  In step 36, the SIP (A) processing unit 13 refers to the call connection information table 19 to check the arrival / departure state of the SIP (A) terminal and determines whether or not the call is ready (S37). For example, if the incoming / outgoing state of the corresponding SIP (A) terminal is in the “incoming” state, it is determined that the call is not ready, and if it is “empty”, it is determined that the call is ready. If the call cannot be made, the SIP (A) processing unit 13 transmits a call rejection (4xx) to the SIP (A) terminal (S38). “Send” is set in the corresponding 19 locations (S39).

  Next, the service adjustment unit 15 changes the SIP URL on the calling side and the SIP URL on the called side in order to cause the SIP (B) processing unit 14 to transmit the INVITE message to the server 2, and The SIP (B) processing unit 14 is notified. As described above, since the telephone number of the terminal is different between the SIP (A) network side and the SIP (B) network side, the SIP URL of the terminal included in the message is also the SIP (A) network side and SIP (B). It will be different from the network side. Therefore, the service adjustment unit 15 refers to the address authentication table 17, changes the SIP URL, and notifies the SIP (B) processing unit 14 of the changed SIP URL. Subsequently, the SIP (B) processing unit 14 transmits an INVITE message to the server 2 of the SIP (B) network in response to an instruction from the service adjustment unit 15 (S41).

  When the INVITE message is transmitted, the service adjustment unit 15 waits for a response from the SIP (B) network side (S42). If this response is 180 Ringing, 183 Session Progress, or 200 OK, the SIP (B) processing unit 14 notifies the SIP (A) processing unit 13 to that effect (S44). Also, when the response to the INVITE message is a transmission result (NG) with some request (4xx) or the like, the SIP (A) processing unit 13 is notified of this (S47). The SIP (A) processing unit 13 that has received the notification in steps 44 and 47 transmits the transmission result of the INVITE message to the SIP (A) terminal (S45 and S48). If 200OK is received, 200OK is transmitted to the SIP (A) terminal in step 45, and then waiting for reception of ACK, transmitting this ACK (S46), ending the processing, and receiving (4xx). If so, in step 48, a rejection (4xx) is transmitted to the SIP (A) terminal and the process is terminated. If 180Ringing or 183 Session Progress has been received, 180Ringing or 183 Session Progress is transmitted to the SIP (A) terminal in step 45, and then the process returns to step 42.

  Also, if the SIP (A) network side does not require authentication processing for call processing, and the SIP (B) network side requires authentication processing for call processing, the SIP (A) network side will receive INVITE. When the message is received (S30), the service adjustment unit 15 grasps the correspondence between the processing procedure on the SIP (A) network side and the processing procedure on the SIP (B) network side (S31), and then SIP (A ) It is determined whether or not an authentication process in the processing unit 13 is necessary (S32). In this case, since the authentication process is unnecessary, the process in step 36 described above is immediately executed.

  Thereafter, an INVITE message is transmitted (S41), and the service adjustment unit 15 waits for a response to this message (S42). When the response from the SIP (B) network side is the first authentication request (407), the service adjustment unit 15 refers to the address authentication table 17 and refers to the SIP (A) terminal corresponding to the telephone number. (B) The authentication user name and authentication password on the network side are passed to the SIP (B) processing unit 14, and the SIP (B) processing unit 14 is caused to transmit an INVITE message with authentication information added to the server 2 (S34). If the response to the INVITE message is other than the first authentication request (407), the process of step 44 or step 47 described above is executed.

  Next, the exchange of messages and the like between the SIP (A) network and the SIP (B) network in the call processing described above will be described using a sequence diagram.

  First, a case where authentication processing is required for call processing on the SIP (A) network side and authentication processing is not required for call processing on the SIP (B) network side will be described with reference to FIG.

  When the SIP (A) terminal 4 sends an INVITE message and the SIP service conversion device 10 receives it (S120 <S30>), the authentication process cannot be performed although the call process requires the authentication process. An authentication request (407) is transmitted to the SIP (A) terminal 4 (S135 <S35>). In response to this authentication request (407), the SIP (A) terminal 4 transmits an INVITE message to which authentication information is added. Upon receiving this (S136 <S30>), the SIP service conversion apparatus 10 performs an authentication process, and if the authentication information is authentic, confirms whether the terminal is in a callable state, and then performs SIP processing. (B) An INVITE message is transmitted to the network server 2 (S121 <S41>).

  Upon receiving this message, the server 2 transmits an INVITE message to the SIP (B) terminal (S122), and waits for a 180 Ringing to be returned from the SIP (B) terminal. When the server 2 receives 180 Ringing from the SIP (B) terminal (S123), it transmits this to the SIP service conversion apparatus 10. When receiving this (S124 <S42>), the SIP service conversion device 10 sends 180 Ringing to the SIP (A) terminal (S125 <S45>).

  Further, the server 2 waits for 200OK sent from the SIP (B) terminal, and when this is sent (S126), transmits 200OK to the SIP service conversion apparatus 10. When receiving this (S127 <S42>), the SIP service conversion device 10 sends 200OK to the SIP (A) terminal (S128 <S45>).

  When receiving an ACK for 200OK from the SIP (A) terminal (S129 <S46>), the SIP service conversion apparatus 10 sends an ACK to the server 2 (S130 <S46>), and the server 2 sends the ACK to the SIP (B) terminal. Send ACK. Thus, the calling process is completed, and a call can be made between the SIP (A) terminal and the SIP (B) terminal.

  Next, a case where authentication processing is not required for call processing on the SIP (A) network side and authentication processing is required for call processing on the SIP (B) network side will be described with reference to FIG.

  When an INVITE message is transmitted from the SIP (A) terminal 4 and the SIP service conversion apparatus 10 receives it (S120 <S30>), authentication processing is not required for accepting this message, so the SIP (B) network is immediately received. The INVITE message is transmitted to the server 2 (S121 <S41>). In the SIP (B) network, since the authentication process is necessary for the INVITE process, the server 2 returns an authentication request (407) as a response to this message. Upon receiving this authentication request (407) (S137 <S42>), the SIP service conversion apparatus 10 transmits an INVITE message with authentication information added to the server 2 (S138 <S43>). Upon receiving this, the server 2 performs an authentication process. If the authentication information is authentic, the server 2 sends an INVITE message to the SIP (B) terminal (S122), and a 180 Ringing is returned from the SIP (B) terminal. Wait for.

  The following is the same as the sequence described with reference to FIG.

  Next, the incoming call sequence will be described with reference to FIG.

  When the INVITE message is transmitted from the SIP (B) terminal 3 and the server 2 receives it (S150), the INVITE is transmitted to the SIP service conversion apparatus 10 (S151). In the SIP (B) network, when an authentication process is required for the calling process, when an INVITE message is received from the SIP (B) terminal 3, an authentication request (407) is sent to the SIP (B) terminal 3. It transmits (S165) and waits for reception of the INVITE message with the authentication information added from the SIP (B) terminal 3 (S166).

  When receiving the INVITE from the server 2 (S151), the SIP service conversion apparatus 10 transmits an INVITE message to the SIP (A) terminal 4 (S152). Thereafter, the SIP service conversion apparatus 10 waits for the 180 Ringing to be returned from the SIP (A) terminal, and when receiving this (S153), transmits the 180 Ringing to the server 2. When receiving this (S154), the server 2 sends 180 Ringing to the SIP (B) terminal (S155).

  The SIP service conversion apparatus 10 further waits for a 200OK from the SIP (A) terminal to be sent (S156), and transmits the 200OK to the server 2. When receiving this (S157), the server 2 sends 200OK to the SIP (B) terminal (S158).

  When the server 2 receives an ACK for 200OK from the SIP (B) terminal (S159), the server 2 sends an ACK to the SIP service conversion apparatus 10 (S160), and the SIP service conversion apparatus 10 sends an ACK to the SIP (A) terminal. . The incoming call process is thus completed, and a call can be made between the SIP (A) terminal and the SIP (B) terminal.

  As described above, in the present embodiment, regarding the incoming call processing, there is basically no different service between the SIP (A) network side and the SIP (B) network side. Therefore, from the sequence diagram of FIG. It seems that the service conversion apparatus 10 is merely relaying between the SIP terminal (A) and the server 2. However, the service adjustment unit 15 of the SIP service conversion apparatus 10 converts the SIP URL during the message relay process between the SIP terminal (A) and the server 2 as in the case of the call processing described above. Processing is in progress.

  As described above, in this embodiment, it is possible to connect two SIP systems having different services and to secure communication between the SIP systems, while preventing a decrease in service in each SIP system.

  Next, as a modification of the above embodiment, a case where various services not described above are performed in either the SIP (A) network or the SIP (B) network will be described. In the following modified examples, the same step numbers are assigned to the same step numbers as above, and the description of the processing contents of the steps is omitted.

  First, as a first modification, a case where the calling number non-notification service is executed on the SIP (A) network side will be described with reference to FIG.

  A case will be described in which a call is made from a SIP (A) terminal having a telephone number of 3000 to a SIP (B) terminal having a telephone number of 4000 using a calling number non-notification service. In the above description, it has been described that the telephone number of a certain terminal changes between the SIP (A) network and the SIP (B) network, but here, in order to simplify the following description and make it easier to understand, the SIP number is changed. (A) It is assumed that the telephone number does not change between the network and the SIP (B) network.

  When using the calling number non-notification service, the caller inputs “184” to the SIP (A) terminal before entering the other party number (4000). Then, the INVITE message from the SIP (A) terminal having the calling number 3000 is transmitted to the SIP service conversion apparatus 10 (S120a). The INVITE message includes “184 4000@yyy.yyy.yyy.yyy” as the SIP URL on the receiving side and “3000@yyy.yyy.yyy.yyy” as the SIP URL on the calling side.

  Upon receiving this INVITE message, the SIP service conversion apparatus 10 transmits the INVITE message to the server 2 of the SIP (B) network (121b). At this time, if the calling party URL and the called party URL included in the message are used as they are, the SIP (B) network does not implement the calling number non-notification service. The server 2 cannot understand these URLs or understands them as URLs of completely different terminals, and cannot establish a session with a target partner. Therefore, the SIP service conversion apparatus 10 changes this URL to a URL that can be understood by the SIP (B) network.

  At this time, when the service adjustment unit 15 of the SIP service conversion apparatus 10 receives the INVITE message requesting the calling number non-notification service, the service adjustment unit 15 refers to the correspondence storage unit 16 and sends the INVITE message to the SIP (B) network. The message is converted into a message that can be understood on the side, passed to the SIP (B) processing unit 14, and the converted message is transmitted from the SIP (B) processing unit 14 to the SIP (B) network side.

  As described above, when a certain message is received, the correspondence storage unit 16 stores which procedure corresponds to the procedure including this message in each of the SIP (A) network and the SIP (B) network. Has been. However, although the procedure including this message can be executed on the SIP (A) network side, it may be a non-corresponding procedure that is not scheduled to be executed on the SIP (B) side. Therefore, the correspondence relationship storage unit 16 stores a technique for converting this non-corresponding procedure into a procedure using a message that can be understood by the SIP (B) network. Also in this case, each procedure of the SIPA processing unit 13, each procedure of the SIPB processing unit 14, and a procedure (change of URL) executed by the service adjustment unit 15 may be stored as a sequence.

  In the case of this modification, the method for converting the procedure itself is not stored, but the method for converting the message is stored. Specifically, the SIP URL “184 4000@yyy.yyy.yyy.yyy on the called side is stored. ”Is removed, and a method of changing the SIP URL“ 3000@yyy.yyy.yyy.yyy ”on the caller side to“ anonymous@anonymous.invalid ”, for example, is stored. Using this changing method, the service adjustment unit 15 changes the URL on the transmission side and the URL on the reception side in the message sent from the SIP (A) network side.

  When the server 2 receives the INVITE message including the changed URL, the server 2 transmits this message to the SIP (B) terminal having the telephone number 4000 (S122b). Since the SIP (B) terminal does not know the URL on the calling side, it cannot display the telephone number on the calling side. That is, in the SIP (B) network, the calling number non-notification service is not implemented, but as a result, the calling number is not notified.

  When the SIP (B) terminal receives this INVITE message and sends 180 Ringing and 200 OK (S123, S126), the SIP packet includes the originating URL and the terminating URL in the SIP packet. The reverse of the URL on the caller side and the URL on the callee side included in the SIP packet of the INVITE message is used. As a result, the destination partner cannot be specified from the URL in the SIP packet. However, since the IP address header of the IP packet in which the SIP packet is incorporated contains the IP addresses of the calling side and the receiving side, it is possible to specify the destination partner.

  The operation after the SIP (B) terminal transmits 180 Ringing (S126) is the same as the call processing described above.

  Note that regarding the 180 Ringing and 200 OK from the SIP (B) network side, the SIP service conversion apparatus 10 changes the URL contained therein again to the URL for the SIP (A) network, and then the SIP (A) terminal. May be transmitted to the SIP (A) terminal as it is. In the above modification, only the contents of one procedure (message) in a certain process are changed. However, when a certain process is executed by executing a plurality of procedures, the number of procedures is changed. It may be. For example, in order to process a service that can be executed in the SIP (A) network, it is necessary to execute five procedures. In the SIP (B) network, this service is not performed and the meaning of the five procedures is described. If it cannot be grasped, it is transformed into a form that can be understood by the SIP (B) network. For example, the number of procedures is increased or decreased, and the content of the message included in each procedure is changed, so that it is equivalent to this service. The service may be substantially performed.

  Next, as a second modification, the SIP (A) network side adopts PRACK (Provisional Response Acknowledgment) as a control function, and the SIP (B) network side does not adopt this. This will be described with reference to FIGS. 15 and 16.

  First, the case of call processing will be described with reference to FIG.

  In the case of call processing, when 180 Ringing is transmitted from the incoming SIP (B) terminal (S125), the outgoing SIP (A) terminal confirms the connection with the SIP service conversion apparatus 10. , PRACK is transmitted (S170). When receiving the PRACK, the SIP service conversion apparatus 10 transmits 200 OK to the SIP (A) terminal (S171).

  Next, the case of incoming call processing will be described with reference to FIG.

  In the case of an incoming call process, the SIP service conversion apparatus 10 receives 180 Ringing from the incoming SIP (A) terminal (S153) and transmits 180 Ringing to the outgoing SIP (B) terminal, and then the SIP service conversion apparatus 10 Transmits PRACK to confirm the connection with the SIP (A) terminal on the called side (S180). When receiving the PRACK, the SIP (A) terminal transmits 200 OK to the SIP service conversion apparatus 10 (S181).

  In the second modification described above, the SIP (A) processing unit 13 of the SIP service conversion apparatus 10 has the SIP (B) processing unit 13 out of a plurality of procedures for executing a service of the SIP (A) network. This is a case where there is no corresponding procedure and a non-corresponding procedure to be processed in the SIP (A) processing 13, that is, PRACK can be executed. In this case, when the service adjustment unit 15 receives a message (PRACK or 180 Ringing) from the SIP (A) network, the process for the message includes a non-corresponding procedure to be processed by the SIP (A) processing unit 13. At this time, the SIP (A) processing unit 13 is caused to execute processing including this non-corresponding procedure (200 OK for PRACK or PRACK for 180 Ringing). Even in this modification, when the correspondence storage unit 16 receives various messages from the SIP (A) network and / or the SIP (B) network, the service adjustment unit 15 executes the SIP (A) processing unit 13. A sequence in which a procedure to be executed and a procedure to be executed by the service adjusting unit 15 in the SIP (B) processing unit 14 are stored in order, and the service adjusting unit 15 performs processing according to the sequence. 14 may execute predetermined processing.

  Next, as a third modification, FIG. 17 and FIG. 18 are used for the case where PRACK is not adopted as a control function on the SIP (A) network side and this is adopted on the SIP (B) network side. I will explain.

  First, the case of call processing will be described with reference to FIG.

When 180 Ringing is transmitted from the incoming SIP (B) terminal to the server 2 (S123), the server 2 sends the 180 Ringing to the SIP service conversion apparatus 10 (S124).
PRACK is transmitted to the SIP (B) terminal on the called side (S172). When the SIP (B) terminal receives this PRACK, it returns 200 OK to the server 2 (S173). Further, the SIP service conversion apparatus 10 receives 180 Ringing from the server 2 (S124), transmits 180 Ringing to the calling SIP (A) terminal (S125), and transmits PRACK to the server 2 (S174). Upon receiving this PRACK, the server 2 transmits 200 OK to the SIP service conversion apparatus 10 (S175).

  Next, the case of incoming call processing will be described with reference to FIG.

  In the case of the incoming call processing, when the server 2 receives 180 Ringing from the SIP service conversion device 10 (S154), it transmits 180 Ringing to the SIP (B) terminal on the caller side (S155) and sends PRACK to the SIP service conversion device 10. Transmit (S182). When receiving the PRACK from the server 2, the SIP service conversion apparatus 10 returns 200 OK to the server 2 (S183). When the SIP (B) terminal on the calling side receives 180 Ringing from the server 2 (S155), it transmits PRACK to the server 2 (S184). Upon receiving this, the server 2 returns 200 OK to the SIP (B) terminal (S185).

  In the third modification, the SIP (B) processing unit 14 of the SIP service conversion apparatus 10 corresponds to the SIP (B) processing unit 13 among a plurality of procedures for executing a service of the SIP (B) network. This is a case where there is no procedure to be performed and an unsupported procedure to be processed in the SIP (B) processing 14, that is, PRACK can be executed. That is, the positions of the SIP (A) processing unit 13 and the SIP (B) processing unit 14 in the second modification are reversed. Therefore, in the SIP service conversion apparatus 10, the SIP (B) processing unit 14 executes the procedure executed by the SIP (A) processing unit 13 in the second modification.

  Next, as a fourth modification, a case where an option is adopted on the SIP (A) network side and a session timer is adopted on the SIP (B) network side as a session monitoring service will be described with reference to FIG.

  When an INVITE (session timer) message is transmitted from the SIP (B) terminal and this is received by the server 2 (S190), 200OK is returned to the SIP (B) terminal (191). Also, when receiving the INVITE (session timer) message from the server 2 (S192), the SIP service conversion device 10 converts this into OPTIONS that can be understood by the SIP (A) network, and sends this to the SIP (A) terminal. (S193). Upon receiving this, the SIP (A) terminal returns 200 OK to the SIP service conversion apparatus 10 (S195). Upon receiving this, the SIP service conversion apparatus 10 transmits 200 OK to the server 2 (S195).

  When the SIP (B) processing unit 14 receives the INVITE message requesting the session monitoring service by the session timer, the service adjustment unit 15 in this modification refers to the correspondence storage unit 16 and sends this INVITE message. It is converted into a message (OPTIONS) that can be understood on the SIP (A) network side, and this is transferred to the SIP (A) processing unit 13, and the converted message (OPTIONS) is transferred from the SIP (A) processing unit 13 to the SIP (A) Send to the network side. In the above, only the case where the INVITE (session timer) message from the SIP (B) network is changed to OPTIONS is shown, but in this modification, the OPTIONS from the SIP (A) network is changed to INVITE (session). Change to timer.

  As described above, when a certain message is received, the correspondence storage unit 16 stores which procedure corresponds to the procedure including this message in each of the SIP (A) network and the SIP (B) network. Has been. However, although the procedure including this message can be executed on the SIP (B) network side, it may be a non-corresponding procedure that is not scheduled to be executed on the SIP (A) side. Therefore, the correspondence relationship storage unit 16 stores a technique for converting this non-corresponding procedure into a procedure based on a message that can be understood by the SIP (A) network. Also in this case, each procedure of the SIPA processing unit 13, each procedure of the SIPB processing unit 14, and a procedure executed by the service adjustment unit 15 (message change) may be stored as a sequence.

  By the way, in the above embodiment, the IP network (LAN) that executes the SIP (A) service is the SIP (A) network, and the IP network (LAN) that executes the SIP (B) service is the SIP (B) network. Although the description is based on the assumption that there are two IP networks, the present invention does not require that the IP network be separated. Hereinafter, as a second embodiment, a mode in which the present invention is applied to a single system (or the same segment) IP network (: LAN) will be described.

  FIG. 20 is a system diagram of the SIP communication system according to the second embodiment. In the figure, a single IP network (: LAN) includes a plurality of SIP (A) terminals 4 that perform call connection operations based on the first SIP, and a second SIP that is different from the first SIP. A plurality of SIP (B) terminals 3 that perform call connection operations are connected. In addition, a SIP service conversion device 10 and a SIP server 2 that performs call connection control based on the second SIP are connected to the LAN.

  Under such an IP network connection configuration, a plurality of SIP (A) terminals 4 constitute a SIP (A ′) service system that provides an IP telephone service according to call connection control based on the first SIP. The SIP server 2 and the plurality of SIP (B) terminals 3 constitute a SIP (B ′) service system that provides an IP telephone service according to call connection control based on the second SIP.

  FIG. 21 is an explanatory diagram showing an operation concept of call connection control in the system shown in FIG. In the figure, the SIP (A ') service SIP (A) terminal 4 is placed under the management of the SIP (B') service SIP server 2, and as in the first embodiment described above. The SIP server 2 manages the call connection of the SIP (A) terminal 4, but the SIP service conversion device 10 is interposed for the exchange of the SIP message. That is, when there is a call connection request from the SIP (A) terminal 4 to the SIP (B) terminal 3, the message M1 related to the call connection from the SIP (A) terminal 4 to the SIP server 2 is first SIP (A ) The message is sent from the terminal 4 to the SIP service conversion device 10 in a message format based on the first SIP, and the SIP service conversion device 10 converts it into a corresponding message format based on the second SIP. The converted message M2 is sent to the SIP server 2. Upon receiving this message M2, the SIP server 2 performs a predetermined process and sends a message M3 based on the second SIP to the SIP terminal 3 that is the connection partner.

  The message M4 related to the call connection from the SIP (B) terminal 3 to the SIP server 2 is sent from the SIP terminal (B) 3 to the SIP server 2 in the message format based on the second SIP. Upon receiving this message M4, the SIP server 2 performs a predetermined process and sends a message M5 to the SIP service conversion apparatus 10 in order to send the message to the SIP (A) terminal 4 side which is the connection partner. . Then, the SIP service conversion device 10 converts this into a message format based on the corresponding first SIP, and sends the message M6 based on the converted first SIP to the SIP terminal 4.

  As described above, when exchanging SIP messages related to the call connection between the SIP (A ′) service system and the SIP (B ′) service system, the SIP service conversion device 10 intervenes, and the message By performing mutual conversion / relay, the SIP (A ') service system SIP (A) terminal 4, the SIP service conversion device 10, the SIP (B') service system SIP server 2 and the SIP terminal 5 are Even when connected to one system (or the same segment) IP network (: LAN), the first SIP message related to SIP (A ') service call connection and SIP (B') service call It is possible to exchange with the second SIP message related to the connection.

  When the call connection is completed and the VoIP call is started, as shown in FIG. 22, the SIP (A) terminal 4 to the SIP (B) terminal without the SIP service conversion apparatus 10 and the SIP server 2 being interposed. The voice IP packet R1 by RTP is transferred to 3 and the voice IP packet R2 by RTP is transferred from the SIP (B) terminal 3 to the SIP (A) terminal 4.

  Note that the functional block diagram and hardware configuration diagram of the SIP service conversion device 10 according to the second embodiment are basically the same as the functional block diagram and hardware configuration diagram shown in FIGS. The various tables used by the SIP service conversion device 10 are the same as the various tables shown in FIGS. 4, 5, and 6. The specific operation flow chart and the operation sequence diagram are the operations shown in FIGS. Since this is the same as the flowchart and the operation sequence diagram, description of the specific operation is omitted.

  That is, in the second embodiment described above, the connection topology of the IP network (LAN) is different from that in the first embodiment, and the SIP (A) terminal 4 of the SIP (A ′) service system is connected to the same LAN system. This shows that even if the SIP service conversion device 10 is connected to the SIP server 2 and SIP (B) terminal 3 of the SIP (B ′) service system, the same effect is exhibited.

It is a systematic diagram of the SIP communication system in 1st embodiment which concerns on this invention. It is a functional block diagram of the SIP service conversion apparatus in 1st embodiment which concerns on this invention. It is a hardware block diagram of the SIP service conversion apparatus in 1st embodiment which concerns on this invention. It is explanatory drawing which shows the structure of the address authentication table in 1st embodiment which concerns on this invention. It is explanatory drawing which shows the structure of the position information table in 1st embodiment which concerns on this invention. It is explanatory drawing which shows the structure of the call connection information table in 1st embodiment which concerns on this invention. It is a flowchart which shows operation | movement of the SIP service conversion apparatus at the time of the REGISTER process in 1st embodiment which concerns on this invention. It is a flowchart which shows operation | movement of the SIP service conversion apparatus at the time of the call processing in 1st embodiment which concerns on this invention. It is a sequence diagram at the time of REGISTER processing in the first embodiment according to the present invention (the SIP (A) network has an authentication process and the SIP (B) network has no authentication process). It is a sequence diagram at the time of REGISTER processing in the first embodiment according to the present invention (no authentication processing in the SIP (A) network, authentication processing in the SIP (B) network). FIG. 5 is a sequence diagram of a call process (the SIP (A) network has an authentication process and the SIP (B) network has no authentication process) in the first embodiment of the present invention. FIG. 5 is a sequence diagram of a call processing (no authentication processing in the SIP (A) network and authentication processing in the SIP (B) network) in the first embodiment according to the present invention. It is a sequence diagram of an incoming call process in the first embodiment according to the present invention. It is a sequence diagram of the call processing (the SIP (A) network has a calling number non-notification service and the SIP (B) network does not have the service) in a first modification according to the present invention. FIG. 10 is a sequence diagram of a call processing process (with a PRACK in the SIP (A) network and no PRACK in the SIP (B) network) in the second modification according to the present invention. FIG. 10 is a sequence diagram of incoming call processing (with a PRACK in the SIP (A) network and no PRACK in the SIP (B) network) in the second modification example of the present invention. FIG. 12 is a sequence diagram of call processing (no SIPACK in the SIP (A) network and PRACK in the SIP (B) network) in the third modification according to the present invention. FIG. 10 is a sequence diagram of incoming call processing (no PRACK in the SIP (A) network and PRACK in the SIP (B) network) in the third modification according to the present invention. It is a sequence diagram of the session monitoring service in the 4th modification based on this invention. It is a systematic diagram of the SIP communication system in 2nd embodiment which concerns on this invention. It is explanatory drawing which shows the call control operation | movement of the SIP communication system in 2nd embodiment which concerns on this invention. It is explanatory drawing which shows the telephone call operation | movement of the SIP communication system in 2nd embodiment which concerns on this invention.

Explanation of symbols

2: SIP server, 3: SIP (B) terminal, 4: SIP (A) terminal, 10: SIP service conversion device, 11: LAN interface control unit, 12: SIP protocol processing unit, 13: SIP (A) processing unit , 14: SIP (B) processing unit, 15: service adjustment unit, 16: correspondence storage unit, 17: address authentication table, 18: location information table, 19: call connection information table

Claims (12)

In a SIP service conversion apparatus that connects a first SIP system that performs a first SIP (Session Initiation Protocol) service and a second SIP system that performs a second SIP service different from the first SIP service,
First SIP processing means for executing a plurality of processes of the first SIP service;
Second SIP processing means for executing a plurality of processes of the second SIP service;
Correspondence in which the correspondence between each of the plurality of processes of the first SIP service or the execution procedure of the process and each of the plurality of processes of the second SIP service or the execution procedure of the process is stored Relationship storage means;
When a message is received from the first SIP system, it is determined which process or procedure in the second SIP service corresponds to the process or procedure for the message by using the stored contents of the correspondence storage means. The second SIP processing means is caused to execute the corresponding process or the corresponding procedure among the plurality of processes or the execution procedures in the second SIP service and / or a message is received from the second SIP system. And a process or procedure corresponding to the message corresponds to which process or procedure in the first SIP service, and a corresponding process or a plurality of processes or execution procedures in the first SIP service Service adjustment means for causing the first SIP processing means to execute a response procedure;
A SIP service conversion device comprising: In the SIP service conversion device according to claim 1,
When the first SIP processing means receives a specific message from the communication source side, the first SIP processing means can execute a process 1a including a procedure of returning a response to the communication source side;
When the second SIP processing means sends the specific message to the communication destination side, a procedure for receiving one or more responses from the communication destination side and a procedure for returning one or more responses to the communication destination side Can execute the process 1b including
The service adjustment means mediates between the first SIP processing means and the second SIP processing means, and when the first SIP processing means receives the specific message, the processing in the second SIP service Among these, the processing including the specific message corresponds to the processing 1b, and the second SIP processing means sets the processing destination side in the processing 1b as the second SIP system side. 1b is executed, and the first SIP processing unit is configured to execute the process 1a with the communication source side in the process 1a as the first SIP system side.
SIP service conversion device characterized by the above. The SIP service conversion device according to claim 2,
The first SIP service includes an access process that does not accompany the access to the first SIP system, and the second SIP service accompanies an authentication process to the access to the second SIP system. Including access processing,
The specific message is an access message;
When the first SIP processing unit receives the access message as the specific message, the service adjustment unit sends the access message to the second SIP processing unit on the second SIP processing unit. When a response including an authentication request is received from the second SIP system, authentication information corresponding to the authentication request is returned.
SIP service conversion device characterized by the above. In the SIP service conversion device according to claim 1,
When the first SIP processing means receives a specific message from the communication source side, the first SIP processing means includes a procedure for receiving one or more responses from the communication source side together with a procedure for performing one or more responses to the communication source side. Including process 2a,
When the second SIP processing means sends the specific message to the communication destination side, the second SIP processing means can execute a process 2b including a procedure of receiving a response from the communication destination side.
The service adjustment means mediates between the first SIP processing means and the second SIP processing means, and when the first SIP processing means receives the specific message, the processing in the second SIP service The processing including the specific message corresponds to the processing 2b, the communication destination side in the processing 2b is set as the second SIP system side, and the processing is performed by the second SIP processing means. 2b and causing the first SIP processing means to execute the process 2a with the communication source side in the process 2a as the first SIP system.
SIP service conversion device characterized by the above. In the SIP service conversion apparatus according to claim 4,
The first SIP service includes an access process accompanied by an authentication process for access to the first SIP system, and the second SIP service does not accompany an authentication process for access to the second SIP system. Including access processing,
The specific message is an access message;
When the first SIP processing unit receives the access message that is the specific message, the service adjustment unit includes an authentication request to the first SIP system on the communication source side in the first SIP processing unit. When a response is made and the first SIP processing unit receives a reply including authentication information, the first SIP processing unit is caused to determine whether or not the authentication information is valid, and the first SIP processing unit When the means determines that the authentication information is valid, the second SIP processing means is caused to send the access message to the second SIP system side which is the communication destination side.
SIP service conversion device characterized by the above. In the SIP service conversion device according to claim 1,
Among the procedures to be performed by the second SIP processing unit with respect to the procedures performed by the first SIP processing unit, the correspondence storage unit is defined in the first SIP service, but is defined in the first SIP service. A method of storing an unspecified procedure that is not defined in the second SIP service into a procedure that can be understood by the second SIP system and that can realize a service equivalent to the first SIP service is stored. ,
When the service adjustment unit causes the second SIP processing unit to execute the undefined procedure, the service adjustment unit uses the technique stored in the correspondence storage unit to convert the undefined procedure to the second procedure. Convert to a procedure that can be understood by the SIP system.
SIP service conversion device characterized by the above. In the SIP service conversion device according to claim 1,
The first SIP processing means does not have a procedure corresponding to the second SIP processing means among the plurality of procedures for executing the first SIP service, and performs processing by the first SIP processing means. A procedure with no response should be possible and
When the service coordinating unit receives the message from the first SIP system, if the processing for the message includes the non-corresponding procedure to be processed by the first SIP processing unit, the service adjusting unit Causing one SIP processing means to execute processing including the non-corresponding procedure;
SIP service conversion device characterized by the above. In the SIP service conversion device according to any one of claims 1 to 7,
The correspondence storage means has a procedure to be executed by the service adjustment means by the first SIP processing means when receiving various messages from the first SIP system and / or the second SIP system. , Storing a sequence in which a procedure to be executed by the second SIP processing unit by the service adjustment unit and a procedure to be executed by the service adjustment unit itself are in order;
According to the sequence, the service adjustment unit causes the first SIP processing unit to execute a predetermined procedure, causes the second SIP processing unit to execute a predetermined procedure, and the service adjustment unit itself performs the predetermined procedure. Execute,
SIP service conversion device characterized by the above. In a SIP service conversion apparatus that connects a first SIP system that performs a first SIP (Session Initiation Protocol) service and a second SIP system that performs a second SIP service different from the first SIP service,
First SIP processing means for executing a plurality of procedures of the first SIP service;
Second SIP processing means for executing a plurality of procedures of the second SIP service;
Among the procedures to be performed by the second SIP processing unit with respect to the procedures performed by the first SIP processing unit, it is defined in the first SIP service but not in the second SIP service. A storage means for storing a technique for converting into a procedure that can be realized in the second SIP system and can realize a service equivalent to the first SIP service, with respect to a non-specified procedure that is not defined;
When causing the second SIP processing means to execute the undefined procedure, the undefined procedure is converted into a procedure that can be understood by the second SIP system using the technique stored in the storage means. Service adjustment means,
A SIP service conversion device comprising: In a SIP service conversion apparatus that connects a first SIP system that performs a first SIP (Session Initiation Protocol) service and a second SIP system that performs a second SIP service different from the first SIP service,
First SIP processing means for executing a plurality of procedures of the first SIP service;
Second SIP processing means for executing a plurality of procedures of the second SIP service;
Service adjustment means for coordinating execution of each procedure by the first SIP processing means and execution of each procedure by the second SIP processing means;
A procedure that the service coordinating unit should cause the first SIP processing unit to execute when receiving various messages from the first SIP system and / or the second SIP system; A storage unit storing a sequence in which a procedure to be executed by the second SIP processing unit and a procedure to be executed by the service adjustment unit itself are stored;
With
According to the sequence, the service adjustment unit causes the first SIP processing unit to execute a predetermined procedure, causes the second SIP processing unit to execute a predetermined procedure, and the service adjustment unit itself performs the predetermined procedure. Execute,
SIP service conversion device characterized by the above. In a SIP service conversion apparatus that connects a first SIP system that performs a first SIP (Session Initiation Protocol) service and a second SIP system that performs a second SIP service different from the first SIP service,
First SIP processing means for executing a plurality of procedures of the first SIP service;
Second SIP processing means for executing a plurality of procedures of the second SIP service;
Service adjustment means for adjusting the first SIP service and the second SIP service;
With
The first SIP service includes a calling number non-notification service that does not cause the called party to output the calling party's calling number by adding a number indicating the calling party's calling number non-notification to the called party number,
The second SIP service includes a calling number notification service for outputting a calling number based on a SIP URL included in a SIP packet from the calling side. Does not include unnumbered services,
The service coordinating means includes, in a SIP packet from the first SIP system, a called party SIP that includes a called party number having a terminal in the second SIP system as a called party and a number indicating the calling party non-notification When the URL and the source SIP URL including the calling party's calling party number are included, the number indicating the non-notification of the calling party number in the called party SIP URL is deleted, and the sender side SIP URL Delete the calling party number in it, or convert it to another character or symbol,
SIP service conversion device characterized by the above. In a SIP service conversion method for connecting a first SIP system that performs a first SIP (Session Initiation Protocol) service and a second SIP system that performs a second SIP service different from the first SIP service,
A first SIP processing step of performing a plurality of processes of the first SIP service;
A second SIP processing step of performing a plurality of processes of the second SIP service;
Correspondence storage means for storing the correspondence between each of the plurality of processes of the first SIP service and each of the plurality of processes of the second SIP service;
When a message is received from the first SIP system, it is checked which process in the second SIP service the process including the message corresponds to, and among the plurality of processes in the second SIP service When the second SIP processing means is caused to execute a corresponding process and / or a message is received from the second SIP system, which process in the first SIP service corresponds to the process including the message And a service adjustment step of causing the first SIP processing means to execute a corresponding process among a plurality of processes in the first SIP service;
SIP service conversion method comprising:

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