JP5895642B2 - SIP (Session Initiation Protocol) system, SIP server, subscriber terminal and program - Google Patents

Description

  The present invention relates to a SIP system, a SIP server, a subscriber terminal, and a program.

  In a communication service provided using a plurality of SIP servers, registration information (subscriber information) related to a subscriber who receives the service is registered in one SIP server. When a subscriber terminal (subscriber terminal) requests terminal registration from the SIP server, the SIP server performs authentication processing of the subscriber terminal using the registered subscriber information. The subscriber terminal whose validity is authenticated is registered in the SIP server. Thereafter, the subscriber uses the registered subscriber terminal and receives a predetermined communication service via the SIP server in which the subscriber terminal is registered.

  Patent Document 1 discloses a method for changing a SIP server to which a terminal is connected for a plurality of SIP servers connected to an IP subsystem network, in which the first SIP server receives a location registration request from the terminal. A first step of processing the location registration of the terminal, and a waiting state for a location registration request from the terminal when the first SIP server changes the location registration destination of the terminal to the second SIP server And when the first SIP server is in the waiting state and receives the location registration request from the terminal, it returns a redirect message to redirect to the second SIP server. And a SIP server changing method in which the second SIP server receives a location registration request corresponding to the redirect. .

JP 2011-172036 A

  There is a case where a process of re-registering a subscriber terminal registered in a certain SIP server with another SIP server (hereinafter, “registration server changing process”) is required. For example, when concentrated traffic due to a disaster or event occurs in a certain SIP server, in order to maintain the service level, it is necessary to re-register the subscriber terminal registered in the SIP server with another SIP server. . The following processing can be considered as the registration server change processing.

  Here, it is assumed that the subscriber terminal registered in the first SIP server is re-registered in the second SIP server. First, the first SIP server transmits subscriber information registered in its own server directly or via another device to the second SIP server. The second SIP server registers the received subscriber information in its own server. Thereafter, when the subscriber terminal requests terminal registration from the second SIP server, the second SIP server performs authentication processing of the subscriber terminal using the registered subscriber information. Then, when the validity of the subscriber terminal is authenticated, the subscriber terminal is registered in its own server.

  In the case of such means, the following problems occur.

  First, in the above means, the first SIP server (the SIP server before the registration change) transmits the subscriber information to the second SIP server (the registration change destination SIP server) directly or via another device. However, if the registration server change process becomes necessary due to a failure of the first SIP server, the first SIP server may not be able to execute the step. In such a case, the registration server changing process is not completed normally, and the subscriber terminal registered in the first SIP server remains registered in the first SIP server and cannot receive the service. .

  However, there has been no means for avoiding such inconvenience on the subscriber terminal side. For this reason, when the said state continues, a subscriber terminal will repeatedly perform a re-call, for example, without grasping the situation of a SIP server. Conventionally, there has been no means for the SIP server to stop the traffic from the subscriber terminal. For this reason, the situation where the SIP server cannot recover from the concentrated traffic continues.

  In order to avoid the inconveniences described above, a means for preparing sufficient facilities for processing concentrated traffic due to a disaster or an event can be considered in advance. However, this means costs a huge amount.

  In addition, the SIP server is separated from the SIP server by the IMS (IP Multimedia Subsystem) mechanism configured by a CSCF (call session control function) and an HSS (Home Subscriber Server) by separating a subscriber database (database storing subscriber information). (CSCF) Detour connection at the time of concentrated traffic is feasible, but database enlargement by centralized management of subscriber information, database backup facilities and redundant facilities are required, and the introduction of facilities requires high costs.

  Accordingly, an object of the present invention is to provide a new technique for re-registering a subscriber terminal registered in a certain SIP server with another SIP server.

According to the present invention,
A plurality of SIP servers;
A plurality of subscriber terminals that are registered in any of the SIP servers and communicate with other terminals via the registered SIP servers;
Each of the plurality of SIP servers
Subscriber information storage means for storing subscriber information used for authentication processing at the time of registering the subscriber terminal, which is information relating to the subscriber who registers the subscriber terminal in a local SIP server;
Upon receipt of the subscriber information from the subscriber terminal, subscriber information registration means for registering in the subscriber information storage means;
When registration request information is received from the subscriber terminal, the registration request information is transmitted using the authentication information included in the registration request information and the subscriber information stored in the subscriber information storage means. Authentication means for performing authentication processing of the subscriber terminal,
Terminal information storage means for registering terminal information of the subscriber terminal whose authenticity is authenticated by the authentication means;
Service providing means for providing a service to a predetermined subscriber terminal using the terminal information registered in the terminal information storage means;
When the legitimacy of the subscriber terminal that has transmitted the registration request information is authenticated and the terminal information of the subscriber terminal is stored in the terminal information storage means, information indicating that registration has occurred, and the subscription A reply means for sending reply information including the subscriber information including information for authenticating the legitimacy of the subscriber terminal to the subscriber terminal;
Have
Each of the plurality of subscriber terminals is
Receiving means for receiving the reply information transmitted by the reply means;
Terminal-side subscriber information storage means for storing the subscriber information included in the reply information received by the receiving means ;
After executing registration of the terminal information in another SIP server after registering the terminal information in the predetermined SIP server, the subscriber information is acquired from the terminal-side subscriber information storage means, Registration change means for transmitting the subscriber information and the registration request information to the other SIP server;
A SIP system is provided.

  According to the present invention, the above SIP server is provided.

  Moreover, according to this invention, the said subscriber terminal is provided.

Moreover, according to the present invention,
A plurality of SIP servers;
In order for a computer to function as the SIP server of a SIP system, which is registered in any of the SIP servers and includes a plurality of subscriber terminals that communicate with other terminals via the registered SIP server.
Computer
Subscriber information storage means for storing subscriber information used for authentication processing when registering the subscriber terminal, which is information related to the subscriber who registers the subscriber terminal in its own SIP server;
Upon receiving the subscriber information from the subscriber terminal, subscriber information registration means for registering in the subscriber information storage means,
When registration request information is received from the subscriber terminal, the registration request information is transmitted using the authentication information included in the registration request information and the subscriber information stored in the subscriber information storage means. Authentication means for performing authentication processing of the subscriber terminal,
Terminal information storage means for registering terminal information of the subscriber terminal whose authenticity is authenticated by the authentication means;
Service providing means for providing a service to a predetermined subscriber terminal using the terminal information registered in the terminal information storage means;
When the legitimacy of the subscriber terminal that has transmitted the registration request information is authenticated and the terminal information of the subscriber terminal is stored in the terminal information storage means, information indicating that registration has occurred, and the subscription A reply means for sending reply information including the subscriber information including information for authenticating the legitimacy of the subscriber terminal to the subscriber terminal;
A program for functioning as a server is provided.

Moreover, according to the present invention,
A plurality of SIP servers;
In order to cause a computer to function as the subscriber terminal of a SIP system comprising: a plurality of subscriber terminals that are registered in any of the SIP servers and communicate with other terminals via the registered SIP server ,
Computer
Terminal-side subscriber information storage means for storing subscriber information transmitted in response to registration from the registered SIP server, including information for authenticating the validity of the own subscriber terminal;
After registering an end late information to a predetermined said SIP server, to execute a process to re-register the terminal information in the other of the SIP server acquires the subscriber information from the terminal-side subscriber information storage means, Registration change means for transmitting the subscriber information and registration request information to the other SIP server;
A program for functioning as a server is provided.

  According to the present invention, a new technique for reregistering a subscriber terminal registered in a certain SIP server with another SIP server is realized.

It is a figure which shows an example of a structure of the SIP system of this embodiment. It is a figure which shows an example of the operation | movement sequence of the SIP system of this embodiment. It is a figure which shows an example of a structure of the SIP system of this embodiment. It is a figure which shows an example of the operation | movement sequence of the SIP system of this embodiment. It is a figure which shows an example of the functional block diagram of the SIP system of this embodiment.

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

  Note that the system, apparatus, and server of the present embodiment are not limited to the CPU, memory, and program loaded in the memory of any computer (programs stored in the memory from the stage of shipping the apparatus in advance, as well as storage such as CDs). Including a program downloaded from a medium or a server on the Internet), a storage unit such as a hard disk for storing the program, and an interface for network connection. It will be understood by those skilled in the art that there are various modifications to the implementation method and apparatus.

  In addition, the functional block diagram used in the description of the present embodiment shows a functional unit block, not a hardware unit configuration. In these drawings, each server and each device are described as being realized by one device, but the means for realizing the same is not limited thereto. That is, it may be a physically separated configuration or a logically separated configuration.

<First Embodiment>
The normal configuration and operation sequence of the SIP system of this embodiment are shown in FIGS. 1 and 2, and the configuration and operation sequence at the time of relocation are shown in FIGS.

  First, a normal configuration will be described with reference to FIG. The SIP system of this embodiment has a plurality of SIP servers (A10, B10) and a plurality of subscriber terminals (A20, A21, B20, B21). The SIP system may further include a subscriber management system (C10). Note that the numbers of SIP servers and subscriber terminals are not limited to those illustrated.

  Each of the plurality of subscriber terminals (A20, A21, B20, B21) is registered in one of the plurality of SIP servers (A10, B10) (terminal information registration), and the registered SIP servers (A10, B10) are registered. And communicate with other subscriber terminals (A20, A21, B20, B21).

  The plurality of SIP servers (A10, B10) can communicate with the subscriber management system (C10). In the subscriber management system (C10), communication services provided using a plurality of SIP servers (A10, B10) are managed. For example, information (subscriber information) related to subscribers who receive the services is managed. Or monitoring the operating states of a plurality of SIP servers (A10, B10).

  The SIP servers (A10, B10) are connected to the network, and hold information (eg, server name, address information, etc.) related to other SIP servers (B10, A10) in the network as a server list (X100). In addition, all SIP servers (A10, B10) hold encryption keys and decryption keys, and any SIP server included in the server list (X100) can be decrypted / verified. ing. The subscriber terminals (A20, A21, B20, B21) do not have a decryption key for decrypting the data encrypted by the SIP server. For this reason, data encrypted by the SIP server is not decrypted or altered on the subscriber terminal side.

  Each of the SIP servers (A10, B10) has a subscriber database (A11, B11). Upon receiving subscriber information about the subscriber who registers the subscriber terminal in the local server from each of the subscriber management system (C10) or the subscriber terminals (A20, A21, B20, B21), the subscriber database (A11 , B11), the subscriber information is stored for each subscriber. The subscriber information includes information used for authentication processing when registering the subscriber terminal. The subscriber information includes, for example, a user ID and a password.

  Here, the operation of registering the subscriber terminal with the SIP server will be described with reference to FIGS. Here, a case where the subscriber terminal (A20) is registered in the SIP server (A10) will be described as an example.

  The SIP server (A10, B10) receives subscriber information about the subscriber using the subscriber terminal (A20, A21, B20, B21) from the subscriber management system (C10) (S10 in FIG. 2), and the SIP server The subscriber information is registered in the database (A11, B11) (S30 in FIG. 2). At that time, the received subscriber information may be encrypted for each subscriber (S20 in FIG. 2) and registered in the database (A11, B11) (S30 in FIG. 2).

  In the case of FIG. 1, the subscriber database (A11) of the SIP server (A10) has registered therein subscriber information (A200, A201) relating to subscribers who use the subscriber terminals (A20, A21). On the other hand, in the subscriber database (B11) of the SIP server (B10), subscriber information (B200, B201) relating to subscribers using the subscriber terminals (B20, B21) is registered.

  The subscriber terminal (A20) transmits a Register message to the SIP server (A10) for initial terminal activation (S40 in FIG. 2) (S50 in FIG. 2). The Register message includes information used for authentication processing, such as a user ID and a password. In FIG. 1, the subscriber terminal (A20) holds the encrypted subscriber data (A200) and SIP server list (X100), but before the terminal registration with the SIP server (A10). At this time, the subscriber terminal (A20) does not hold such information.

  The SIP server (A10) that has received the Register message performs an authentication process using the subscriber information stored in the database (A11) (S60 in FIG. 2), and the authenticated subscriber terminal (A20) Then, the encrypted subscriber information (A200) and the SIP server list (X100) are transmitted together with the registration result (S70 in FIG. 2). The subscriber terminal (A20) that has received the information stores the encrypted subscriber data (A200) and SIP server list (X100) in the terminal itself. Since the subscriber terminal (A20) does not have a decryption key for decrypting the received subscriber data (encrypted), the received subscriber data (encrypted) is decrypted and altered. I can't.

  When the subscriber information (A200) is not encrypted and is registered in the database (A11) of the SIP server (A10), the SIP server (A10) is registered in the database (A11). After acquiring the subscriber information, the subscriber information is encrypted and transmitted to the subscriber terminal (A20) together with the SIP server list (X100) and the registration result.

  Through the above process, the subscriber terminal (A20) is registered in the SIP server (A10). If the registration is successful, the subscriber terminal (A20) can be provided with a VOIP (Voice over Internet Protocol) service by the SIP server (A10).

  Next, the operation when the SIP server accommodation (registration) is changed will be described with reference to FIGS. Here, a case where the subscriber terminal (A20) registered in the SIP server (A10) is re-registered in the SIP server (B10) will be described as an example.

  When the subscriber terminal (A20) detects a failure or congestion (S1 in FIG. 4) of the SIP server (A10) in which the terminal is accommodated (registered), the subscriber terminal (A20) performs a process of accommodating (registered) and changing the SIP server. It starts (S2 in FIG. 4). First, a SIP server to be re-registered (a newly registered SIP server) is determined using the retained SIP server list (X100). Here, it is assumed that the SIP server (B10) is determined as the SIP server to be re-registered. Then, the subscriber terminal (A20) transmits a Register message to which the stored subscriber data (encrypted A200) is added to the SIP server (B10) to be changed (S3 in FIG. 4).

  When subscriber information (encrypted) is added to the received Register message, the SIP server (B10) determines that it is a registration request for accommodation (registration) change. After the obtained subscriber information (encrypted A200) is decrypted (S4 in FIG. 4), the subscriber information is registered in the database (B11) in its own SIP server (S5 in FIG. 4). . Next, the SIP server (B10) uses the registered subscriber information and the received Register message to perform authentication processing of the terminal device that has transmitted the information (S6 in FIG. 4), and the authentication is successful. The terminal device is accommodated (registered). When registration is completed, a registration result (OK) is transmitted to the subscriber terminal (S7 in FIG. 4).

  After the registration is completed, the subscriber terminal (A20) can be provided with the VOIP service via the SIP server (B10) as the accommodation change destination.

  In addition, in the case where there is a higher-order SIP server or a location server of the SIP server that has changed accommodation, the SIP server (a newly registered SIP server) is configured to notify the higher-order server of the changed information. By this processing, even in a connection form using a higher-order SIP server, connection to a subscriber whose accommodation has been changed is possible.

  Also, when the accommodation change is performed at the accommodation destination SIP server, the update is rejected for the regular Register update from the subscriber terminal, and the empty SIP server list and the subscriber are received when the registration Register is received again. Configure to send data. The subscriber terminal that has received the empty SIP server list performs re-registration with the original SIP server by initial activation. Thus, the subscriber terminal is registered in the original SIP server accommodated.

  By providing the accommodation change type (temporary or permanent) at the time of registration of the subscriber terminal, it becomes possible to transfer subscribers between SIP servers.

  Further, by using together with means for confirming the load status of the SIP server in the network on the subscriber terminal side, it is possible to avoid traffic concentration on a specific SIP server from the subscriber terminal side.

  Further, additional information (priority, service, fee, quality, performance, location, etc.) may be added to the SIP server list distributed from the SIP server to the subscriber terminal. Then, the terminal (A20) desiring to change the registration to another SIP server may select one SIP server as a new registration destination using additional information included in the SIP server list.

  According to the SIP system of the present embodiment described above, when a failure occurs in the SIP server 10, the subscriber terminal 20 registered (accommodated) in the failed SIP server 10 is processed by processing on the terminal side. It is possible to register (accommodate) in another SIP server 10 again.

  In addition, the registration server changing process of the plurality of subscriber terminals 20 registered (accommodated) in the SIP server 10 in which a failure has occurred on the service providing side (SIP server, subscriber management system) is not performed collectively. Since it can be performed individually on the terminal 20 side, concentration of processing on the service providing side can be avoided. Further, in such a case, since it can be sequentially changed from the subscriber terminal that requires VOIP communication, the accommodation can be changed efficiently, and traffic of re-calls due to call loss can be greatly reduced.

  Furthermore, the communication service providing side can cope with concentrated traffic without having an excessive number of SIP servers in advance.

<Second Embodiment>
FIG. 5 shows an example of a functional block diagram of the SIP system of this embodiment. As illustrated, the SIP system includes a plurality of SIP servers 10 and a plurality of subscriber terminals 20. Each of the plurality of subscriber terminals 20 is registered in one of the plurality of SIP servers 10 and communicates with other terminals via the registered SIP server. The SIP server 10 and the subscriber terminal 20 can communicate via a network such as the Internet. For convenience, FIG. 5 shows one SIP server 10 and one subscriber terminal 20. Hereinafter, each structure is demonstrated in order of the SIP server 10 and the subscriber terminal 20. FIG.

<< SIP Server 10 >>
The SIP server 10 includes a subscriber information storage unit 11, a subscriber information registration unit 12, an authentication unit 13, a terminal information storage unit 14, and a service providing unit 16. Note that the SIP server 10 may further include a reply unit 15. Alternatively, the SIP server 10 may further include a reply unit 15, an encryption unit 17, and a decryption unit 18. Hereinafter, each part will be described.

  The subscriber information storage unit 11 stores information on a subscriber who registers the subscriber terminal 20 in the SIP server 10 and is used for authentication processing when registering the subscriber terminal 20. That is, only the subscriber information of the subscriber who stores the subscriber terminal 20 in the first SIP server is stored in the subscriber information storage unit 11 provided in the first SIP server 10 among the plurality of SIP servers 10. In the subscriber information storage unit 11 provided in the second SIP server 10 different from the first SIP server 10, only the subscriber information of the subscriber who stores the subscriber terminal 20 in the second SIP server is stored. Remembered. The subscriber information includes, for example, a user ID and a password.

  When the subscriber information registration unit 12 receives the subscriber information from the subscriber terminal 20, the subscriber information registration unit 12 registers it in the subscriber information storage unit 11. The subscriber information registration unit 12 may receive subscriber information from a device different from the subscriber terminal 20 and register it in the subscriber information storage unit 11. For example, the subscriber information registration unit 12 may receive subscriber information from the subscriber management system (C10 in FIG. 1) described in the first embodiment and register it in the subscriber information storage unit 11. The subscriber management system is configured to be able to communicate with each of the plurality of SIP servers 10 and manages the plurality of SIP servers 10. The subscriber information registration unit 12 can receive subscriber information from the subscriber terminal 20 and other devices (for example, a subscriber management system) via a network such as the Internet or a WAN (Wide Area Network). .

  The subscriber information registration unit 12 may encrypt the received subscriber information in the subscriber information storage unit 11 in an encrypted state after being encrypted by the encryption unit 17 described below. Alternatively, the subscriber information registration unit 12 may register the received subscriber information in the subscriber information storage unit 11 without being encrypted.

  As an example of the present embodiment, the subscriber information registration unit 12 can receive encrypted subscriber information from the subscriber terminal 20. In such a case, the subscriber information registration unit 12 may register the received encrypted subscriber information in the subscriber information storage unit 11 in an encrypted state. Alternatively, the subscriber information registration unit 12 may decrypt the received encrypted subscriber information with the decryption unit 18 described below, and then register it in the subscriber information storage unit 11.

  When the authentication unit 13 receives the registration request information from the subscriber terminal 20, the authentication unit 13 uses the authentication information included in the registration request information and the subscriber information stored in the subscriber information storage unit 11. Authentication processing of the subscriber terminal 20 that has transmitted the information is performed. When subscriber information encrypted is stored in the subscriber information storage unit 11, it is decrypted by the decryption unit 18 described below and used for authentication processing.

  The registration request information includes information for authenticating each subscriber terminal 20 and address information of each subscriber terminal 20. The information for authenticating each subscriber terminal 20 is collated with the subscriber information stored in the subscriber information storage unit 11, and includes, for example, a user ID, a password, etc. as with the subscriber information. May be.

  The authentication unit 13 uses the registration request information and the subscriber information stored in the subscriber information storage unit 11 of the own SIP server 10 to transmit the registration request information. Perform authentication processing. Detailed description of the authentication process is omitted.

  In the terminal information storage unit 14, the terminal information of the subscriber terminal 20 that has been authenticated by the authentication unit 13 is registered. The terminal information includes, for example, address information of each terminal, a terminal ID, and the like.

  The service providing unit 16 provides a service (eg, VOIP service) to a predetermined subscriber terminal 20 using the terminal information registered in the terminal information storage unit 14. Service details are a matter of design.

  The reply unit 15 is registered when the authenticity of the subscriber terminal 20 that has transmitted the registration request information is authenticated by the authentication unit 13 and the terminal information of the subscriber terminal 20 is stored in the terminal information storage unit 14. Reply information including subscriber information including information indicating this and information for authenticating the validity of the subscriber terminal 20 is transmitted to the subscriber terminal 20.

  The subscriber information including information for authenticating the validity of the subscriber terminal 20 is, for example, a subscriber who authenticates the validity when the authentication process is performed using a user ID and a password. The subscriber information includes the same user ID and password as the user ID and password included in the registration request information transmitted from the subscriber terminal 20.

  Note that the reply unit 15 may cause the encryption unit 17 described below to encrypt the subscriber information included in the reply information. Then, the reply unit 15 may transmit the encrypted subscriber information to the subscriber terminal 20. In this way, it is possible to avoid inconvenience that the subscriber information is falsified on the subscriber terminal 20 side.

  Further, the reply unit 15 may include SIP server identification information for identifying the own SIP server 10 in the reply information. The reply unit 15 may include a SIP server list including address information of each of the plurality of SIP servers 10 in the reply information.

  The encryption unit 17 holds an encryption key for encryption, and encrypts subscriber information using the encryption key.

  Note that the encryption key held by the encryption unit 17 may be different from the encryption key held by the encryption unit 17 of another SIP server 10. In the case of such a configuration, the reply unit 15 preferably includes SIP server identification information for identifying the own SIP server 10 in the reply information.

  The decryption unit 18 holds information (decryption key) for decrypting the subscriber information encrypted by the other SIP server 10, and decrypts the encrypted subscriber information.

  When the encryption units 17 of the plurality of SIP servers 10 are configured to encrypt the subscriber information with different encryption keys, the decryption unit 18 encrypts each SIP server 10 with each SIP server 10. It is possible to hold information (decryption key) for decrypting the converted subscriber information, and decrypt the subscriber information using the information (decryption key).

  In such a case, the decryption unit 18 needs to specify which SIP server 10 each piece of subscriber information is encrypted, but may be realized by the following means, for example. First, when encrypted subscriber information is transmitted from the subscriber terminal 20 to the SIP server 10, SIP server identification information for identifying the encrypted SIP server 10 is transmitted together with the subscriber information. Configure as follows. Then, the decryption unit 18 uses the SIP server identification information to specify which SIP server 10 the subscriber information is encrypted with. Each subscriber terminal 20 uses the SIP server identification information included in the reply information transmitted from the reply unit 15 to each subscriber terminal 20 as an encrypted subscriber included in the reply information. Together with the information, it can be transmitted as SIP server identification information that identifies the SIP server 10 that has performed the encryption.

  Such a SIP server 10 can be realized, for example, by installing the following program in a computer.

A plurality of SIP servers;
In order for a computer to function as the SIP server of a SIP system, which is registered in any of the SIP servers and includes a plurality of subscriber terminals that communicate with other terminals via the registered SIP server.
Computer
Subscriber information storage means for storing subscriber information used for authentication processing when registering the subscriber terminal, which is information related to the subscriber who registers the subscriber terminal in its own SIP server;
Upon receiving the subscriber information from the subscriber terminal, subscriber information registration means for registering in the subscriber information storage means,
When registration request information is received from the subscriber terminal, the registration request information is transmitted using the authentication information included in the registration request information and the subscriber information stored in the subscriber information storage means. Authentication means for performing authentication processing of the subscriber terminal,
Terminal information storage means for registering terminal information of the subscriber terminal whose authenticity is authenticated by the authentication means;
Service providing means for providing a service to a predetermined subscriber terminal using the terminal information registered in the terminal information storage means;
When the legitimacy of the subscriber terminal that has transmitted the registration request information is authenticated and the terminal information of the subscriber terminal is stored in the terminal information storage means, information indicating that registration has occurred, and the subscription A reply means for sending reply information including the subscriber information including information for authenticating the legitimacy of the subscriber terminal to the subscriber terminal;
Program to function as.

<< Subscriber terminal 20 >>
The subscriber terminal 20 includes a terminal-side subscriber information storage unit 21 and a registration change unit 22. The subscriber terminal 20 may further include a receiving unit 23. Hereinafter, each part will be described.

  The terminal side subscriber information storage unit 21 stores subscriber information including information for authenticating the validity of the own subscriber terminal 20. That is, the terminal-side subscriber information storage unit 21 stores subscriber information related to a subscriber who uses the own subscriber terminal 20.

  The receiving unit 23 receives the reply information transmitted by the reply unit 15 of the SIP server 10. And the terminal side subscriber information storage part 21 memorize | stores the subscriber information contained in the reply information which the receiving part received.

  In addition, when the subscriber information encrypted is contained in the reply information which the receiving part 23 received, the terminal side subscriber information storage part 21 memorize | stores the encrypted subscriber information as it is.

  Further, when the reply information received by the receiving unit 23 includes encrypted subscriber information and SIP server identification information, the terminal-side subscriber information storage unit 21 stores the encrypted subscriber information. Information is stored as it is, and SIP server identification information is stored in association with the subscriber information.

  Furthermore, when the SIP server list is included in the reply information received by the receiving unit 23, the terminal-side subscriber information storage unit 21 stores the SIP server list.

  The registration changing unit 22 registers subscriber information from the terminal-side subscriber information storage unit 21 when executing processing for re-registering terminal information in another SIP server 10 after registering the terminal information in a predetermined SIP server 10. The subscriber information and registration request information are acquired and transmitted to another SIP server 10.

  When the encrypted subscriber information is stored in the terminal side subscriber information storage unit 21, the registration changing unit 22 uses the encrypted subscriber information as it is together with the registration request information and other SIP servers. 10 to send.

  When the SIP server identification information is stored in the terminal side subscriber information storage unit 21 in association with the encrypted subscriber information, the registration change unit 22 uses the encrypted subscriber information as it is. Along with the server identification information and registration request information, it is transmitted to another SIP server 10.

  When the SIP server list is stored in the terminal side subscriber information storage unit 21, the registration changing unit 22 newly registers terminal information from among the plurality of SIP servers 10 included in the SIP server list. Another SIP server 10 may be selected.

  Such a subscriber terminal 20 can be realized, for example, by installing the following program in a computer.

A plurality of SIP servers;
In order to cause a computer to function as the subscriber terminal of a SIP system comprising: a plurality of subscriber terminals that are registered in any of the SIP servers and communicate with other terminals via the registered SIP server ,
Computer
Terminal-side subscriber information storage means for storing the subscriber information including information for authenticating the validity of the own subscriber terminal;
After executing registration of the terminal information in another SIP server after registering the terminal information in the predetermined SIP server, the subscriber information is acquired from the terminal-side subscriber information storage means, Registration change means for transmitting the subscriber information and registration request information to the other SIP server;
Program to function as.

According to the present embodiment, it is possible to achieve the same effects as those of the first embodiment.
Hereinafter, examples of the reference form will be added.
1 multiple SIP servers;
A plurality of subscriber terminals that are registered in any of the SIP servers and communicate with other terminals via the registered SIP servers;
Each of the plurality of SIP servers
Subscriber information storage means for storing subscriber information used for authentication processing at the time of registering the subscriber terminal, which is information relating to the subscriber who registers the subscriber terminal in a local SIP server;
Upon receipt of the subscriber information from the subscriber terminal, subscriber information registration means for registering in the subscriber information storage means;
When registration request information is received from the subscriber terminal, the registration request information is transmitted using the authentication information included in the registration request information and the subscriber information stored in the subscriber information storage means. Authentication means for performing authentication processing of the subscriber terminal,
Terminal information storage means for registering terminal information of the subscriber terminal whose authenticity is authenticated by the authentication means;
Service providing means for providing a service to a predetermined subscriber terminal using the terminal information registered in the terminal information storage means;
Have
Each of the plurality of subscriber terminals is
Terminal-side subscriber information storage means for storing the subscriber information including information for authenticating the validity of the own subscriber terminal;
After executing registration of the terminal information in another SIP server after registering the terminal information in the predetermined SIP server, the subscriber information is acquired from the terminal-side subscriber information storage means, Registration change means for transmitting the subscriber information and the registration request information to the other SIP server;
SIP system having
2 In the SIP system according to 1,
The SIP server is registered when the validity of the subscriber terminal that has transmitted the registration request information is authenticated and the terminal information of the subscriber terminal is stored in the terminal information storage means. And reply means for sending reply information including the subscriber information containing information for authenticating the legitimacy of the subscriber terminal to the subscriber terminal,
The subscriber terminal further includes receiving means for receiving the reply information transmitted by the reply means,
The SIP system in which the terminal side subscriber information storage means stores the subscriber information included in the reply information received by the receiving means.
32 In the SIP system described in 2,
The SIP server further includes encryption means for encrypting the subscriber information included in the reply information;
The reply means of the SIP server sends the reply information including the encrypted subscriber information to the subscriber terminal;
The terminal side subscriber information storage means of the subscriber terminal stores the encrypted subscriber information included in the reply information received by the receiving means;
When the registration change unit of the subscriber terminal executes the process of re-registering the terminal information in another SIP server after registering the terminal information in a predetermined SIP server, the terminal-side subscriber information Obtaining the encrypted subscriber information from the storage means, sending the subscriber information and the registration request information to the other SIP server;
The SIP server holds information for decrypting the subscriber information encrypted by the other SIP server, and when the subscriber information registration means receives the encrypted subscriber information, SIP system further comprising decryption means for decrypting person information.
4 In the SIP system according to 3,
The encryption means of the SIP server encrypts the subscriber information with a key different from the encryption means of the other SIP server,
The reply means of the SIP server includes, in the reply information, SIP server identification information for identifying its own SIP server, and transmits it to the subscriber terminal.
The terminal-side subscriber information storage means of the subscriber terminal stores the encrypted subscriber information and the SIP server identification information included in the reply information received by the receiving means in association with each other,
When the registration change unit of the subscriber terminal executes the process of re-registering the terminal information in another SIP server after registering the terminal information in a predetermined SIP server, the terminal-side subscriber information Acquiring the encrypted subscriber information and the SIP server identification information associated with each other from the storage means, and transmitting the acquired information and the registration request information to the other SIP server;
The decryption means of the SIP server holds information for decrypting the subscriber information encrypted by each SIP server for each of the plurality of SIP servers, and the subscriber information registration means is encrypted When the subscriber information and the SIP server identification information are received, the SIP server specified by the SIP server identification information is specified as the SIP server that encrypted the subscriber information, and the specified SIP server encrypts the SIP server. SIP system for decoding the subscriber information by using the information for decoding the converted subscriber information.
5 In the SIP system according to any one of 2 to 4,
The reply means of the SIP server includes an SIP server list including address information of each of the plurality of SIP servers in the reply information, and transmits the reply server to the subscriber terminal.
The terminal-side subscriber information storage means of the subscriber terminal stores the SIP server list included in the reply information received by the receiving means;
The registration change unit of the subscriber terminal includes the terminal information registered in the predetermined SIP server, and then executes the process of re-registering the terminal information in another SIP server. A SIP system that selects the other SIP server from among the plurality of SIP servers.
6 The SIP server according to any one of 1 to 5.
7 The subscriber terminal according to any one of 1 to 5.
8 multiple SIP servers;
In order for a computer to function as the SIP server of a SIP system, which is registered in any of the SIP servers and includes a plurality of subscriber terminals that communicate with other terminals via the registered SIP server.
Computer
Subscriber information storage means for storing subscriber information used for authentication processing when registering the subscriber terminal, which is information related to the subscriber who registers the subscriber terminal in its own SIP server;
Upon receiving the subscriber information from the subscriber terminal, subscriber information registration means for registering in the subscriber information storage means,
When registration request information is received from the subscriber terminal, the registration request information is transmitted using the authentication information included in the registration request information and the subscriber information stored in the subscriber information storage means. Authentication means for performing authentication processing of the subscriber terminal,
Terminal information storage means for registering terminal information of the subscriber terminal whose authenticity is authenticated by the authentication means;
Service providing means for providing a service to a predetermined subscriber terminal using the terminal information registered in the terminal information storage means;
When the legitimacy of the subscriber terminal that has transmitted the registration request information is authenticated and the terminal information of the subscriber terminal is stored in the terminal information storage means, information indicating that registration has occurred, and the subscription A reply means for sending reply information including the subscriber information including information for authenticating the legitimacy of the subscriber terminal to the subscriber terminal;
Program to function as.
9 multiple SIP servers;
In order to cause a computer to function as the subscriber terminal of a SIP system comprising: a plurality of subscriber terminals that are registered in any of the SIP servers and communicate with other terminals via the registered SIP server ,
Computer
Terminal-side subscriber information storage means for storing the subscriber information including information for authenticating the validity of the own subscriber terminal;
After executing registration of the terminal information in another SIP server after registering the terminal information in the predetermined SIP server, the subscriber information is acquired from the terminal-side subscriber information storage means, Registration change means for transmitting the subscriber information and registration request information to the other SIP server;
Program to function as.

DESCRIPTION OF SYMBOLS 10 SIP server 11 Subscriber information storage part 12 Subscriber information registration part 13 Authentication part 14 Terminal information storage part 15 Reply part 16 Service provision part 17 Encryption part 18 Decryption part 20 Subscriber terminal 21 Terminal side subscriber information storage part 22 Registration change part 23 Receiving part A10, B10 SIP server A11, B11 Subscriber database C10 Subscriber management system A20, A21, B20, B21 Subscriber terminal A200, A201, B200, B201 Encrypted subscriber information X100 Server list

Claims (8)

A plurality of SIP (Session Initiation Protocol) servers;
A plurality of subscriber terminals that are registered in any of the SIP servers and communicate with other terminals via the registered SIP servers;
Each of the plurality of SIP servers
Subscriber information storage means for storing subscriber information used for authentication processing at the time of registering the subscriber terminal, which is information relating to the subscriber who registers the subscriber terminal in a local SIP server;
Upon receipt of the subscriber information from the subscriber terminal, subscriber information registration means for registering in the subscriber information storage means;
When registration request information is received from the subscriber terminal, the registration request information is transmitted using the authentication information included in the registration request information and the subscriber information stored in the subscriber information storage means. Authentication means for performing authentication processing of the subscriber terminal,
Terminal information storage means for registering terminal information of the subscriber terminal whose authenticity is authenticated by the authentication means;
Service providing means for providing a service to a predetermined subscriber terminal using the terminal information registered in the terminal information storage means;
When the legitimacy of the subscriber terminal that has transmitted the registration request information is authenticated and the terminal information of the subscriber terminal is stored in the terminal information storage means, information indicating that registration has occurred, and the subscription A reply means for sending reply information including the subscriber information including information for authenticating the legitimacy of the subscriber terminal to the subscriber terminal;
Have
Each of the plurality of subscriber terminals is
Receiving means for receiving the reply information transmitted by the reply means;
Terminal-side subscriber information storage means for storing the subscriber information included in the reply information received by the receiving means ;
After executing registration of the terminal information in another SIP server after registering the terminal information in the predetermined SIP server, the subscriber information is acquired from the terminal-side subscriber information storage means, Registration change means for transmitting the subscriber information and the registration request information to the other SIP server;
SIP system having The SIP system according to claim 1 ,
The SIP server further includes encryption means for encrypting the subscriber information included in the reply information;
The reply means of the SIP server sends the reply information including the encrypted subscriber information to the subscriber terminal;
The terminal side subscriber information storage means of the subscriber terminal stores the encrypted subscriber information included in the reply information received by the receiving means;
When the registration change unit of the subscriber terminal executes the process of re-registering the terminal information in another SIP server after registering the terminal information in a predetermined SIP server, the terminal-side subscriber information Obtaining the encrypted subscriber information from the storage means, sending the subscriber information and the registration request information to the other SIP server;
The SIP server holds information for decrypting the subscriber information encrypted by the other SIP server, and when the subscriber information registration means receives the encrypted subscriber information, SIP system further comprising decryption means for decrypting person information. The SIP system according to claim 2 ,
The encryption means of the SIP server encrypts the subscriber information with a key different from the encryption means of the other SIP server,
The reply means of the SIP server includes, in the reply information, SIP server identification information for identifying its own SIP server, and transmits it to the subscriber terminal.
The terminal-side subscriber information storage means of the subscriber terminal stores the encrypted subscriber information and the SIP server identification information included in the reply information received by the receiving means in association with each other,
When the registration change unit of the subscriber terminal executes the process of re-registering the terminal information in another SIP server after registering the terminal information in a predetermined SIP server, the terminal-side subscriber information Acquiring the encrypted subscriber information and the SIP server identification information associated with each other from the storage means, and transmitting the acquired information and the registration request information to the other SIP server;
The decryption means of the SIP server holds information for decrypting the subscriber information encrypted by each SIP server for each of the plurality of SIP servers, and the subscriber information registration means is encrypted When the subscriber information and the SIP server identification information are received, the SIP server specified by the SIP server identification information is specified as the SIP server that encrypted the subscriber information, and the specified SIP server encrypts the SIP server. SIP system for decoding the subscriber information by using the information for decoding the converted subscriber information. In the SIP system according to any one of claims 1 to 3 ,
The reply means of the SIP server includes an SIP server list including address information of each of the plurality of SIP servers in the reply information, and transmits the reply server to the subscriber terminal.
The terminal-side subscriber information storage means of the subscriber terminal stores the SIP server list included in the reply information received by the receiving means;
The registration change unit of the subscriber terminal includes the terminal information registered in the predetermined SIP server, and then executes the process of re-registering the terminal information in another SIP server. A SIP system that selects the other SIP server from among the plurality of SIP servers. The SIP server according to any one of claims 1 to 4 . The subscriber terminal according to any one of claims 1 to 4 . A plurality of SIP servers;
In order for a computer to function as the SIP server of a SIP system, which is registered in any of the SIP servers and includes a plurality of subscriber terminals that communicate with other terminals via the registered SIP server.
Computer
Subscriber information storage means for storing subscriber information used for authentication processing when registering the subscriber terminal, which is information related to the subscriber who registers the subscriber terminal in its own SIP server;
Upon receiving the subscriber information from the subscriber terminal, subscriber information registration means for registering in the subscriber information storage means,
When registration request information is received from the subscriber terminal, the registration request information is transmitted using the authentication information included in the registration request information and the subscriber information stored in the subscriber information storage means. Authentication means for performing authentication processing of the subscriber terminal,
Terminal information storage means for registering terminal information of the subscriber terminal whose authenticity is authenticated by the authentication means;
Service providing means for providing a service to a predetermined subscriber terminal using the terminal information registered in the terminal information storage means;
When the legitimacy of the subscriber terminal that has transmitted the registration request information is authenticated and the terminal information of the subscriber terminal is stored in the terminal information storage means, information indicating that registration has occurred, and the subscription A reply means for sending reply information including the subscriber information including information for authenticating the legitimacy of the subscriber terminal to the subscriber terminal;
Program to function as. A plurality of SIP servers;
In order to cause a computer to function as the subscriber terminal of a SIP system comprising: a plurality of subscriber terminals that are registered in any of the SIP servers and communicate with other terminals via the registered SIP server ,
Computer
Terminal-side subscriber information storage means for storing subscriber information transmitted in response to registration from the registered SIP server, including information for authenticating the validity of the own subscriber terminal;
After registering an end late information to a predetermined said SIP server, to execute a process to re-register the terminal information in the other of the SIP server acquires the subscriber information from the terminal-side subscriber information storage means, Registration change means for transmitting the subscriber information and registration request information to the other SIP server;
Program to function as.

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