JP2006287688A - Call controller, subscriber terminal and call control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent misdial by address change of a telephone number, etc. <P>SOLUTION: This call controller 1-1 stores a plurality of pieces of address information of terminals and user identification information for identifying users of the terminals in a telephone subscriber table by associating them with one another, extracts address information of a terminal at a connecting destination and user identification information of the terminal from call connection requests ((1) Invite) to be transmitted from the terminal, judges whether or not the extracted address information of the terminal at the connection destination and the user identification information of the terminal coincide with the stored address information of the terminals and the user identification information of the terminals ((2) retrieval processing) and performs processing so as to perform call connection processing ((3)a-call processing) to the call connection request when they coincide as a result of judgment and to perform error response processing ((3)b-Decline processing) to the call connection request when they do not coincide. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication system in a communication network using IP (Internet Protocol).

  Currently, when making a call with a mobile phone or the like, a call is made by selecting a destination from a telephone directory stored in the memory of the mobile phone. In addition, when a mobile phone operator is changed, the mobile phone number must be changed to a different phone number. In this case, the original telephone number is assigned to another new subscriber.

  For example, if the caller does not know that the person who is expected to be the callee has changed the mobile phone operator and the phone number has been changed, the caller can save the caller from the phonebook stored in the mobile phone memory. If a destination is selected and a call is made, it may happen that the user is connected to a mobile phone of another subscriber and makes a wrong call to an unintended party. At this time, if the caller permits the number notification, the caller's telephone number is displayed on the mobile phone of the wrong caller.

  As a method for preventing such an erroneous call, as shown in Patent Document 1, when a telephone number is changed, the changed telephone number is notified to the registered subscriber's mobile phone, and each subscriber's mobile phone is notified. There is a way to update the phone book.

JP 2002-305580 A

  In the method described in Patent Document 1 described above, if there is a mobile phone that has not received the change notification, a similar erroneous call occurs. In this case, there is a possibility that the caller information is notified to an unintended subscriber.

  Therefore, an object of the present invention is to provide a technique capable of preventing erroneous calls due to address information changes such as telephone number changes.

  In order to solve the above-described problems, the present invention provides a call control apparatus to which a plurality of subscriber terminals are connected, and the user identification for identifying the subscriber terminal address information and the subscriber terminal user. A plurality of storage means for storing information in association with each other; and address information of the connected subscriber terminal and user identification information of the subscriber terminal are extracted from a call connection request transmitted from the subscriber terminal Extracting means, address information of the connected subscriber terminal extracted by the extracting means, and user identification information of the subscriber terminal, address information of the subscriber terminal stored in the storage means, A determination means for determining whether or not the user identification information of the subscriber terminal matches, and if the result of the determination by the determination means is a match, call connection processing is performed for the call connection request; If you did not , And processing means for performing an error response process to the call connection request.

  According to the present invention, it is possible to prevent an erroneous call due to an address change such as a change of a destination telephone number. Further, it is possible not to notify the unintended party of the information on the calling side and the information on the called side.

  FIG. 1 shows a communication system configuration diagram in the first embodiment of the present invention.

  In FIG. 1, the communication system in the first embodiment includes a plurality of terminals 100-1 and 100-2 and a call control device 1-1, and the terminals 100-1 and 100-2 and the call control device. 1-1 is connected to the IP network 200 and makes a call using IP.

Terminals 100-1 and 100-2 are subscriber terminals, and establish a call with a communication destination terminal using SIP (Session Initiation Protocol) to perform a call. SIP is one of call control protocols used in Internet telephones and the like, and performs communication control by determining a destination based on a SIP address (SIP URI: Uniform Resource Identifier) consisting of “user name @ domain name”. For example, in FIG. 1, the SIP address of the terminal 100-1 is “050-xxxx-1234@center.net”, and the SIP address of the terminal 100-2 is “050-yyyy-2345@center.net”. It is said. The user name is identification information for identifying the terminals 100-1 and 100-2, and the domain name indicates identification information for identifying an ISP (Internet Service Provider) that manages the terminals. In the present embodiment, an example is shown in which the user name is the telephone number of the terminal, but the user name may be set and changed individually by each subscriber. In the subscriber terminal, the telephone number of the terminal, the SIP address, and the User ID are stored in association with each other.
In the present embodiment, the call control device also has an ISP function, and manages subscriber information such as the user name and telephone number of each subscriber terminal. In addition, as subscriber information, a telephone number and a SIP address are uniquely associated with each other. In the present embodiment, the telephone number, the SIP address, and the User ID are also uniquely associated with the call control. The device stores these subscriber information.

  In the present embodiment, SIP will be described as an example, but other communication control protocols may be used.

  The call control device 1-1 is a device that controls a call between terminals, and performs communication control according to the SIP address included in the call connection request.

  In the present embodiment, in the call control device, a plurality of address information such as the SIP address of the subscriber terminal and user identification information for identifying the user of the subscriber terminal are associated with each other in the telephone subscriber table. The address information of the connection destination subscriber terminal and the user identification information of the subscriber terminal are extracted from the call connection request ((1) Invite) stored and transmitted from the subscriber terminal, and the extracted connection Whether the address information of the previous subscriber terminal and the user identification information of the subscriber terminal match the stored address information of the subscriber terminal and the user identification information of the subscriber terminal ((2) search processing), if the result of the determination is a match, call connection processing is performed for the call connection request ((3) a-Invite). To refuse to connect to Answer process ((3) b-603Decline processing) is processing to perform. In this case, when the SIP address of the connected subscriber terminal is changed, the telephone subscriber table is rewritten, and when the call is made without changing the caller's telephone directory, the case does not match. Happens. As a result, erroneous calls can be prevented.

  As address information, a telephone number may be used instead of indicating the SIP address of the subscriber terminal.

  In a call using SIP, first, when the calling terminal 100-1 accepts the selection of the user name of the connected subscriber terminal, the calling terminal 100-1 receives the SIP Invite message to indicate the connected subscriber terminal. The SIP address and User ID which is user identification information of the subscriber terminal are added and sent to the call control device 1-1. The Invite message is a SIP call connection request message. In the call control device, the IP address of the called terminal 100-2 is acquired from the incoming SIP address included in the Invite message using the correspondence data of the SIP address-IP address managed in the own device. Further, the call control device determines whether or not the incoming SIP address and User ID included in the Invite message match the incoming SIP address and User ID managed in the own device. If so, the Invite message is transferred to the called terminal 100-2 using the acquired IP address. In this way, when the called terminal 100-2 receives the Invite message, the called terminal is in a receiving state. If the call control device 1-1 does not match as a result of the determination, the call control device 1-1 does not transfer the Invite message to the called terminal 100-2, and issues a Decline message which is a SIP message indicating connection rejection. The connection is prevented by transmitting to the terminal 100-1.

  FIG. 2 shows another configuration example of the communication system in the present embodiment.

  The difference between FIG. 1 and FIG. 2 is that a plurality of call control apparatuses 1-1 and 1-2 exist in the IP network 200. In the system configuration shown in FIG. 2, the call control device 1-1 has the domain name “west.net”, manages the terminal 100-1 “050-xxxx-1234@west.net”, and the call control device. 1-2 is a domain name “east.net”, which manages the subordinate terminal 100-2 “050-yyyy-2345@east.net”. In FIG. 2, a terminal 100-1 is a subscriber terminal having a domain name “west.net”, and subscriber information such as a user name and an SIP address of the terminal 100-1 is a domain name “west.net”. It is managed by the call control device 1-1 of “net”. Similarly, the subscriber information of the terminal 100-2 having the domain name “east.net” is managed by the call control device 1-2 having the domain name “east.net”. When the call control devices that manage the subscriber terminals are the same, the telephone numbers may be allocated so that the station numbers of the telephone numbers, for example, “xxxx” are the same. In this case, a station number is assigned to each call control device.

  The basic operation when the communication system shown in FIG. 2 is configured is the same as that of the communication system shown in FIG. The operation of the communication system shown in FIG. 1 is different from the operation of the communication system shown in FIG. 1 in that there are a plurality of call control devices. The point of transfer is to the call control device that manages the terminal of the connection destination. In the example shown in FIG. 2, the call control device 1-1 that has received a call connection request ((1) Invite) from the calling terminal 100-1 manages the call destination terminal 100-2 that is the connection destination. 1-2 is determined, and the call connection request ((2) Invite) is transferred to the call control device 1-2 that manages the destination call terminal 100-2. The call control device 1-2 determines whether or not the subscriber information managed in the own device matches the subscriber information included in the call connection request received from the call control device 1-1 ((3) If the search result matches, the call connection process is performed for the call connection request ((4) a-Invite). Processing ((4) b and (5) b-603 Decline processing) is performed to prevent connection of an erroneous call.

  Next, the configuration of each device will be described.

  First, the configuration of the terminal 100 will be described with reference to FIG. FIG. 3 is a block diagram showing a configuration example of the terminal in the first embodiment.

  The terminal 100 includes a communication interface 40, a processor 41, a memory 60, an input device 47, and a display device 42.

  The communication interface 40 has a physical interface wirelessly or wired with the network. The processor 41 executes each processing program stored in the memory 60. The memory 60 stores programs and tables processed by the processor 41. The input device 47 inputs a telephone number or characters. Further, the input device 47 includes a UserID transmission button used when notifying the other terminal of UserID, which is subscriber identification information of the terminal.

  In addition, the memory 60 stores a table such as own terminal information 43 and a telephone book 44 indicating information of subscribers using the terminal, a communication process 45 that enables a call connection and a call by the terminal, and a telephone book 44. A telephone directory registration process 46 for storing data is stored. The communication process 45 and the phone book registration process 46 store programs corresponding to each process.

  The own terminal information 43 stores the own SIP address of the terminal, the UserID that is the identifier of the subscriber who uses the terminal, and the IP address of the own terminal. Further, when the terminal makes a call to another terminal The IP address of the call control device that is the destination of the SIP packet that is a call connection packet is held. The own terminal information 43 is set in advance by a telephone carrier at the time of contract. Alternatively, the subscriber registers the SIP address, UserID, and call control device IP address notified from the operator from the input device 47 in the terminal 100-2 used when performing the telephone service. Such subscriber information is held as the own terminal information 43 of the terminal 100. In addition, when the subscriber wants to update himself / herself, the input device 47 can accept the update information and update the contents stored in the own terminal information 43. Further, the updated terminal information is notified from the terminal 100 to the call control device 1-1 side by a registration sequence of a telephone subscriber information table shown in FIG. Information can also be updated.

  Next, the contents of the phone book 44 held in the terminal 100 will be described with reference to FIG. FIG. 4 is an explanatory diagram showing a configuration example of the telephone directory.

  The telephone directory 44 stores a SIP address 441, a User ID 442 indicating an identifier of a subscriber who uses the SIP address, and a name 443 indicating the name of the subscriber who uses the SIP address. The telephone directory 44 may store a telephone number.

  The phone book 44 in the present embodiment includes a User ID 442, and the terminal 100 adds the User ID 442 stored in the phone book to the Invite message that is a call connection request message when a call connection request is made. The phone book 44 is registered by the user as in the conventional case. Furthermore, registration can be performed by notifying the other party's phone book of the user ID according to the sequence shown in the sequence diagram of registration in the phone book shown in FIG.

  Next, the configuration of the call control device will be described with reference to FIG. FIG. 5 shows a block diagram of the call control device in the present embodiment.

  The call control device 1 includes a line interface 10, a processor 11, a memory 50, an input device 19, and a display device 12.

  The line interface 10 takes a physical interface with the network. The processor 11 executes each processing program stored on the memory 50. The memory 50 stores programs and tables processed by the processor 11. The input device 19 is a keyboard or the like, and receives information necessary for management. The display device 12 is a display or the like. The memory 50 communicates with the telephone subscriber information table 13 used for determining whether or not the connection request from the calling terminal (for example, the terminal 100-1) is a wrong call, and each device existing on the IP network. Communication processing 16 for storing, and table search processing 17 for searching the telephone subscriber information table are stored. The communication process 16 and the table search process 17 store programs corresponding to each process.

  Next, the contents of the telephone subscriber information table 13 provided in the call control device will be described with reference to FIG. FIG. 6 is an explanatory diagram showing a configuration example of the telephone subscriber information table 13.

  Information in the telephone subscriber information table 13 is managed and registered by a business operator that manages the call control device 1. The telephone subscriber information table 13 includes the SIP address 20 of the subscriber, the address 22 of the SIP server that manages the subscriber terminal corresponding to the SIP address, the UserID 23 that is the subscriber identifier corresponding to the SIP address, and the SIP The IP address 24 corresponding to the address is stored as subscriber information.

  The call control device 1 manages subscriber information such as the SIP address 20 of the subscriber terminal under management, the IP address 22 of the management call control device, the UserID 23, and the IP address 24. The SIP address 20 and the management call control device IP address 22 are stored. A provider that provides telephone service manages the call control device 1, and the provider receives a telephone service application from the subscriber, determines a SIP address and a UserID that is a subscriber identifier for the subscriber, and this subscriber The IP address of the call control device 1-1 used when making a call connection is notified to the subscriber by means of mail or e-mail. At this time, the business operator registers the SIP address 20, UserID 23, and management call control device IP address 22 in the telephone subscriber information table 13 of the call control device 1-1 managed by the business operator.

  FIG. 6 shows the contents stored in the call control device 1 with the IP address “10.10.1.127”. As shown in FIG. 6, since the management call control device IP address 22 corresponding to the SIP address “050-xxxx-1234@west.net” is “10.10.1127”, the SIP address “050- It is the own device that manages the subscriber terminal of “xxxx-1234@west.net”. In this case, the information “UserA” and “10.10.1.2” are respectively stored as the UserID 23 and the IP address 24 corresponding to the SIP address “050-xxxx-1234@west.net” in the telephone subscriber information table. Hold. Further, in the case of the SIP address “050-zzzz-3456@north.net”, the management call control device IP address 22 is “10.20.1.254”, and the own device manages the subscriber information of this SIP address. Therefore, the corresponding UserID 23 and IP address 24 information is not held. In this case, when the call control apparatus 1 receives an invite message addressed to “050-zzz-3456@north.net”, the call control manages the subscriber information of “050-zzz-3456@north.net”. The invite message is transferred to the device (IP address: 10.20.1.254).

  Next, a sequence when the subscriber information is updated will be described with reference to FIG. FIG. 7 shows a sequence diagram of registration in the telephone subscriber information table.

  In the present embodiment, it is possible to cope with a case where the IP address of the terminal is dynamically changed by DHCP (Dynamic Host Configuration Protocol) or the like. For example, when DHCP is used, when the terminal is turned on, the terminal is assigned an IP address from the server on the provider side and stores this.

  As shown in FIG. 7, for example, when the terminal 100-1 registers the subscriber information, the terminal 100-1 has already acquired the IP address “10.10.1.2” by the above-described means. is there. That is, in the own terminal information 43 of the terminal 100-1, the own SIP address is “050-xxxx-1234@center.net”, the UserID is “UserA”, the IP address is “10.10.2.1.2” It is assumed that “10.10.1.127” is registered in the control device IP address.

  When registering the subscriber information, for example, when the IP address is automatically updated, such as when the terminal is moved, update information of the subscriber information may be included. In this case, a unique protocol may be used, or a SIMPLE (SIP for Instant Messaging and Presence Leveraging Extensions) protocol used in existing presence server communication may be used. Alternatively, registration may be performed by calling the SIP address of the call control device or by sending a mail including subscriber information to the mail address of the call control device.

  As illustrated in FIG. 7, the own SIP address terminal 100-1 includes, as subscriber information, an SIP address “050-xxxx-1234@center.net”, a User ID “User A”, and an IP address “10.10.1. .2 "to the call control device 1-1, user information registration is performed for the call control device 1-1 (IP address" 10.10.1.127 ") (S6-1). Upon receiving the user information registration, the call control device 1-1 associates the user ID 23 “User A” with the IP address of the terminal in the telephone subscriber information table 13 in association with the SIP address “050-xxxx-1234@center.net”. 24 “10.10.1.1.2” is registered (S6-2). After completing the registration, the call control device 1-1 transmits a message indicating that the registration is completed to the terminal 100-1 (S6-3). Thus, the update of the telephone subscriber information table with respect to the SIP address “050-xxxx-1234@center.net” is completed.

  Next, a method for registering the User ID in the telephone directory of the terminal will be described with reference to FIG. FIG. 8 is a sequence diagram showing an example of a method for registering a telephone directory of a terminal.

  The purpose of this sequence is to register the SIP address 441 and the user ID 442 of the subscriber who uses the SIP address in the destination telephone book 44 in the case of the configuration shown in FIG. This sequence is a sequence for exchanging the SIP address and the corresponding UserID between the terminal 100-1 and the terminal 100-2. In general, in order to tell the other party his / her phone number between mobile phones, a method of making a call to the other party's mobile phone is often used. Similarly, in this sequence, a call is made from the terminal 100-1 (SIP address “050-xxxx-1234@west.net”) to the terminal 100-2 (SIP address “050-yyyy-2345@east.net”). Call. In this case, an Invite message, which is a SIP call connection request message, is transmitted from the terminal 100-1, and the source SIP address and the destination SIP address are added to the message as information. In this case, unlike the case of a call at the time of wrong call prevention, the other party's User ID is not added, so the call is the same as the conventional one.

  The Invite message is first sent to the call control device 1-1 (S5-1), and from the telephone subscriber information table 13 held in the call control device 1-1, the SIP address “050-yyyy-2345 @ The management call control device IP address corresponding to “east.net” is retrieved, and the call control device 1-1 transfers the Invite message to the call control device 1-2 of the management call control device (S5-21). In the call control device 1-2, an IP address corresponding to the SIP address “050-yyyy-2345@east.net” is searched, and an Invite is obtained for the IP address “10.10.1.75” of the terminal 100-2. The message is transferred (S5-2). At this time, the SIP address “050-xxxx-1234@west.net” of the terminal 100-1 is notified to the terminal 100-2. While the subscriber of the terminal 100-2 does not answer the call, the terminal 100-2 returns a SIP Ringing message via the call control device 1-1 (S5-3, S5-31, S5-4). This is a state in which the telephone ringer is ringing. The subscriber of the terminal 100-2 confirms that the calling SIP address is displayed on the display device 42 of the terminal, and transmits the UserID of the subscriber of the terminal 100-2 based on the subscriber's judgment. The user ID transmission button in the input device 47 of 100-2 is pressed (S5-5). When the UserID transmission button is pressed, the terminal 100-2 adds the UserID registered in the terminal information 43 to the Ringing message shown in FIG. 9 and transmits it (S5-6, S-61, S5-7). ).

  FIG. 9 shows the Ringing message format in the present embodiment. As shown in FIG. 9, a new item called ToUserID32 is further added to the existing Ringing message. ToUserID indicates the UserID on the destination SIP address side of the previous Invite message. That is, when a call is made from the terminal 100-1 to the terminal 100-2, the ToUserID information indicates the UserID corresponding to the SIP address of the terminal 100-2. The ToUserID in the sequences S5-6, S5-61, and S5-7 indicates “UserB” that is the UserID of the SIP address “050-yyy-2345@east.net”.

  After receiving the UserID of the terminal 100-2, the terminal 100-1 registers the SIP address “050-yyy-2345@east.net” and the UserID “UserB” in the phone book of the own device (S5-8). . Thus, the UserID paired with the SIP address “050-yyyy-2345@east.net” is registered in the phone book of the terminal 100-1. Thereafter, when the terminal 100-1 accepts the pressing of the UserID transmission button (S5-9), the terminal 100-1 adds its own UserID to the Cancel message shown in FIG. 10 and passes through the call control devices 1-1 and 1-2. The user ID of the terminal 100-1 is notified to 100-2 (S5-10, S5-11, S5-12, S5-13).

  FIG. 10 shows the format of the Cancel message in the present embodiment.

  The Cancel message corresponds to an operation in which the caller hangs up while one of the SIP messages is not answered. The Cancel message shown in FIG. 10 is provided with a field for adding a new UserID to the existing Cancel message. In this case, a new item “FromUserID33” is added. FromUserID33 indicates the UserID of the source SIP address. That is, when the terminal 100-1 instructs the terminal 100-2 to disconnect from the telephone, the FromUserID33 information indicates the UserID paired with the SIP address of the terminal 100-1. FromUserID33 in sequences S5-10 and S5-11 indicates "UserA" which is the UserID of SIP address "050-xxxx-1234@west.net".

  As illustrated in FIG. 8, the terminal 100-2 that has received the Cancel message (S5-11) registers the SIP address “050-xxxx-1234@west.net” and the UserID “UserA” in the telephone directory (S5). -12).

  By such a sequence, it is possible to notify each other's SIP address and UserID just by ringing the other party's telephone and register them in the respective telephone books.

  In addition to the sequence shown in FIG. 8, the SIP address and UserID of the subscriber to be registered in the telephone directory are taught in advance by means such as mail, and the subscriber uses the input device 47 to set the SIP address of the destination subscriber. You may receive UserID and register it in the telephone directory of the terminal.

  Next, call control processing for a call connection request in the present embodiment will be described.

  As described above, in the present embodiment, in the call control device, from the call connection request transmitted from the subscriber terminal, the address information of the connected subscriber terminal and the user identification information of the subscriber terminal are obtained. The extracted address information of the connected subscriber terminal and the user identification information of the subscriber terminal are stored in the telephone subscriber information table, and the subscriber terminal address information and the subscriber It is determined whether or not it matches the user identification information of the terminal, and if the result of the determination is a match, call connection processing is performed for the call connection request. To perform error response processing. In the following, first, the address information of the extracted connection destination subscriber terminal and the user identification information of the subscriber terminal are divided into the address information of the subscriber terminal and the user identification information of the subscriber terminal. The sequence of call connection processing when they match is described with reference to FIGS. 11 and 12, and the sequence of error response processing when they do not match is described with reference to FIGS. Further, FIG. 15 shows an existing format of the Invite message, and FIG. 16 shows a format of the Invite message in the present embodiment.

  FIG. 11 shows a sequence diagram of call connection processing. In this case, the terminal 100-1 (IP address “10.10.10.2”) and the terminal 100-2 (IP address “10.10.1.75”) are configured as shown in FIG. It is assumed that user information is managed in the telephone subscriber information table of the call control device 1-1 (IP address “10.10.1.127”).

  As illustrated in FIG. 11, when the subscriber of the terminal 100-2 wants to make a call with the terminal 100-1, the terminal 100-2 sends a message to the subscriber with the SIP address “050-xxxx-1234@center.net”. Request a connection. It is assumed that the SIP address “050-xxxx-1234@center.net” and UserID “UserA” are registered in the phone book of the terminal 100-2. When the terminal 100-2 makes a call to the SIP address “050-xxxx-1234@center.net”, the terminal 100-2 adds the UserID 30 to the Invite message and transmits it to the call control device 1-1 ( S3-1). In this case, the UserID 30 included in the Invite message is “UserA”.

  The call control device 1-1 extracts the destination SIP address and UserID added to the Invite message, and the extracted contents match the destination SIP address and UserID stored in the telephone subscriber information table 13. If the contents match (S3-2), it is determined that the connection request is not an erroneous call, and an Invite message is transferred to the terminal 100-1 (S3-3). By processing in this way, the terminal 100-1 enters an incoming state.

  FIG. 12 shows a sequence diagram of call connection processing when there are a plurality of call control devices as shown in FIG. As shown in FIG. 12, when the subscriber of the terminal 100-1 wants to make a call with the terminal 100-2, the terminal 100-1 calls the SIP address “050-yyyy-2345@east.net”. The terminal 100-1 adds the UserID 30 to the Invite message shown in FIG. 16 and transmits it to the call control device 1-1 (S4-1). In this case, the UserID 30 included in the Invite message is “UserB”. When receiving the Invite message as shown in FIG. 16, the call control device 1-1 detects the management call control device IP address information 22 from the destination SIP address of the telephone subscriber information table 13, and the management call control device IP address. If the information 22 is not the own device, the Invite message is transferred to the call control device 1-2 corresponding to the call control device IP address information 22 managing the subscriber information of the terminal 100-2 (S4-2). When receiving the Invite message, the call control device 1-2 extracts the SIP address and UserID of the destination added to the Invite message as described above, and the extracted contents are stored in the telephone subscriber information table 13. If the contents match (S4-3), the Invite message is transferred to the terminal 100-2 (S4-4).

Note that the existing format of the Invite message shown in FIG. 15 is an Invite message including the destination SIP address and the calling party's SIP address. In this embodiment, as shown in FIG. The destination UserID 30 is added to the message.
By performing the processing in this way, the terminal 100-2 enters the incoming state even when there are a plurality of call control devices.

  Next, FIG. 13 shows a sequence in which an erroneous call is detected by the call control device, and an error response process is performed on the call corresponding thereto.

  When the subscriber of the terminal 100-2 shown in FIG. 1 wants to make a call with the terminal 100-1, the terminal 100-2 tries to make a call to the subscriber with the SIP address “050-xxxx-1234@center.net”. It is assumed that the SIP address “050-xxxx-1234@center.net” and UserID “UserA” are registered in the phone book of the terminal 100-2. When the terminal 100-2 makes a call to the SIP address “050-xxxx-1234@center.net”, the terminal 100-1 adds UserID30 to the Invite message shown in FIG. (S1-1).

  The call control device 1-1 that has received the Invite message searches the telephone subscriber information table 13 using the SIP address “050-xxxx-1234@center.net” included in the Invite message as a search key, and the call control unit 1-1 in the Invite message. It is determined whether or not the included UserID “UserA” matches the UserID stored in the telephone subscriber information table 13 (S1-2). If they do not match, the call control device 1-1 determines that this connection request is an erroneous call, transmits a Decline message to the terminal 100-1, and the connection request from the terminal 100-2 to the terminal 100-1. To refuse.

  By processing in this way, it is possible to prevent a caller's information such as a telephone number from being notified to an unintended party without connecting a wrong call.

FIG. 14 shows a sequence diagram of error response processing when there are a plurality of call control devices as shown in FIG.
The sequence shown in FIG. 14 is almost the same as that in FIG. 13, and in order to determine whether or not the UserID matches, the destination SIP address of the telephone subscriber information table 13 of each call control device 1-1 and 1-2 is set. Based on the corresponding management call control device IP address information 22, the Invite message is transferred to the call control device 1-2 that manages the subscriber information of the terminal 100-2 (S2-1, S2-2). When receiving the Invite message, the call control device 1-2 extracts the SIP address and UserID of the destination added to the Invite message as described above, and the extracted contents are stored in the telephone subscriber information table 13. The normality of the UserID is confirmed by comparing whether or not the destination SIP address matches the UserID (S2-3). If they do not match, a Decline message is transmitted to the terminal 100-1 (S2-4, S2-5).

  FIG. 17 shows the existing format of the Decline message, and FIG. 18 shows the format of the Decline message in the present embodiment.

  In the existing format of the Decline message shown in FIG. 17, it is a Decline message for notifying an error response. In this embodiment, as shown in FIG. 18, the Decline message indicates “Cause” indicating the cause of the error. : User ID is indirect "34 message is added. As the cause of the error, it can be notified that the User ID is incorrect.

  In this case, when receiving the Decline message, the terminal 100-1 can display a message as shown in FIG. As for the message, "January 1, 2005 8:30" User B's "050-yyyy-2345" that I just phoned seems to have changed, so please check. ”May be displayed.

  By processing in this way, even when there are a plurality of call control devices, it is possible to prevent a caller's information such as a telephone number from being notified to an unintended partner without connecting a wrong call.

  Next, processing in the call control processing device will be described in detail. FIG. 20 shows a processing flow when the call control device receives an Invite message.

  When the call control device 1 receives the Invite message (S300), the processor 11 executes the table search process 17 shown in FIG. 5 to search for the destination SIP address (the SIP address of the called terminal) included in the Invite message. The telephone subscriber information table 13 is searched as a key (S301). As a result of the search, if the data of the incoming SIP address cannot be detected, a “404 Not Found” message, which is one of the SIP messages, is transmitted to the calling terminal (S302). The “404 Not Found” message is a message that means that the called terminal that requested the connection cannot be found. As a result of the search, if the information of the corresponding SIP address can be detected, it is determined whether or not the management call control device IP address 22 stored in the telephone subscriber information table 13 is the IP address of the own device (S303). ). If the result of the determination is that the management call control device IP address 22 is not its own device, the received Invite message is transferred to the device of the IP address registered in the management call control device IP address 22 (S304). If the management call control device IP address 22 is its own device, it is determined whether or not the ToUserID 30 is included in the received Invite message (S305). If the ToUserID30 is not included, it is determined that the service of the wrong call prevention function in this embodiment is not performed, and the Invite message is transmitted to the called terminal as it is, assuming that the call is a normal call (S306). If ToUserID30 is included in the received Invite message, the normality of UserID is confirmed (S307). The objects to be compared are the UserID described as ToUserID30 in the Invite message and the UserID obtained from the search result of the telephone subscriber information table 13. The former is the UserID of the called party expected by the caller, and the latter is the UserID of the subscriber who uses the number actually called by the caller. If the two UserIDs match as a result of the comparison, the processor 11 executes the communication process 16 shown in FIG. 5, deletes the ToUserID30 from the Invite message, and transfers the Invite message to the called terminal (S308). If they do not match, the communication processing 16 determines that the received Invite message is a wrong call, and returns a Dicline message for refusing the call connection to the calling terminal (S309).

  By processing as described above, it is possible to prevent an unintended subscriber from being notified of calling party information such as an SIP address and called party information without connecting a wrong call. Become.

  Next, a second embodiment of the present invention will be described. In the first embodiment, the calling terminal adds the UserID of the called subscriber to the Invite message to prevent erroneous calls. However, at this time, a malicious caller may continuously access the telephone subscriber information table 13 of the call control device a plurality of times for the purpose of bringing the call control device down. For example, it is conceivable to impersonate a specific caller in order to know the UserID for the SIP address of the called party, create a fictitious UserID multiple times, and send an Invite message. In this case, in the first embodiment, the call control device that receives the Invite message searches the telephone subscriber information table 13 to determine whether or not they match, but this differs depending on the malicious one. There is a possibility that a large amount of this search occurs due to a large number of calls to which UserID is added, and the UserID coincides with any of them, and connection processing is performed for a call connection request.

  In this embodiment, an optional service for detecting and rejecting a connection request from such a malicious caller will be described. In the present embodiment, the call control device 1 determines whether or not the caller is legitimate by confirming whether or not the password paired with the caller's SIP address matches. In other words, an error response process is performed for a call connection request.

  First, the configuration of the terminal 100 will be described. The terminal 100 has substantially the same configuration as that shown in FIG. 3 except that the caller's password is registered in advance in the own terminal information 43. This password is for checking the legitimacy of the caller when the caller receives the wrong call prevention service shown in the first embodiment. For example, when a provider who manages the call control device 1 performs an erroneous call prevention service using the first embodiment, a password can be assigned to each subscriber.

  The configuration of the call control device of this embodiment is shown in FIG. In FIG. 24, in the call control device 1B, in addition to the configuration of the call control device 1 in the first embodiment shown in FIG. The call control device 1B includes a line interface 10, a processor 11B, a memory 50B, an input device 19, and a display device 12. The processor 11B executes each processing program stored in the memory 50B. The memory 50B communicates with the telephone subscriber information table 13B that holds a password for determining whether or not the calling terminal (for example, the terminal 100-1) is valid, and for communicating with each device existing on the IP network. Communication processing 16B, and table search processing 17B for searching the telephone subscriber information table are stored. The communication process 16B and the table search process 17 store programs corresponding to each process. The memory 50B further includes a counter 14, statistical control information 15, and statistical timer processing 18. These are functions added to handle error responses of Invite messages that are generated from a specific caller in a certain period when the passwords coincide by chance when the validity of the password is checked. . In this case, the counter 14 is provided for each terminal 100 and counts the number of Invite messages received within a certain time. The statistical control information 15 includes a clear period for clearing the counter 14 and a counter threshold value for determining that the message is an invalid Invite message because an Invite message equal to or greater than the threshold value is received at a certain time in the period. The statistical timer process 18 clears the counter in accordance with the clear period of the statistical control information 15 and determines whether the access is unauthorized based on the threshold value and the count value of the counter 14.

  Next, the contents of the telephone subscriber information table 13B provided in the call control device 1B will be described with reference to FIG. FIG. 25 is an explanatory diagram showing a configuration example of the telephone subscriber information table 13B.

  As shown in FIG. 25, the telephone subscriber information table 13B is provided with a password 21 area for storing the password of each terminal. When the call control device 1B receives the Invite message, the call control device 1B determines whether or not to perform the UserID match check by confirming the normality of the password paired with the caller's SIP address.

  FIG. 21 and FIG. 22 show the Invite reception process of the call control device 1B when the illegal Invite message transmission prevention option is implemented in the second embodiment. FIG. 23 shows the format of the Invite message in the second embodiment.

  In the second embodiment, as shown in FIG. 23, “db_passwd” indicating the password 2300 of the own apparatus is added to the Invite message in addition to the destination UserID 30.

  In FIG. 21, when the call control device 1B receives an Invite message from the calling terminal (S400), the processor 11B of the call control device 1B first determines whether the calling terminal is valid. The table search processing 17B shown in FIG. 24 is executed, and the telephone subscriber information table 13 is searched using the calling SIP address as the search key. As a result of the search, if the calling SIP address is not registered, it is assumed that the calling terminal does not exist, and a Decline message for rejecting the connection is transmitted to the calling terminal (S400-1). ). When data corresponding to the calling SIP address is detected, it is determined whether or not the password 2300 is added to the Invite message. If the password 2300 is not added, there is a possibility of a normal call, so that the process proceeds to the process 402 shown in FIG. 22 in order to perform the same process as the normal call connection. In this case, the calling side UserID may be further added to determine whether or not the UserID has been added (S401).

  When the password 2300 is added to the Invite message, this password 2300 is extracted, and it is confirmed whether or not the extracted password matches the password stored in the telephone subscriber information table 13 (S403). As a result of the confirmation, if there is a mismatch, the calling terminal is regarded as invalid and a Decline message for rejecting the connection is transmitted to the calling terminal (S403-1).

  If the passwords match, the counter 14 provided for each calling number is incremented by one (S405). After counting up, the value of the counter 14 is compared with the threshold value in the statistical control information 15 (S406). If the value of the counter 14 exceeds the threshold value as a result of the comparison, the call control device 1 determines that the Invite message from this calling terminal is invalid and transmits a Decline message to the calling terminal ( S407). The calling terminal that has transmitted the unauthorized Invite message may be processed so as not to accept any Invite message in the future, or may not be accepted for a certain period of time. As a result, even if the passwords coincide, the connection can be rejected for an Invite message that makes a large amount of access.

  If the value of the counter 14 does not exceed the threshold value as a result of the comparison, the call control device 1 determines that the access is made by a legitimate caller and proceeds to S300 in FIG. The process which confirms UserID of the side is performed.

  In S401, if the password 2300 is not added, the same processing as the normal call connection is performed without checking the UserID. In this case, the processor 11 of the call control device 1 executes the table search processing 17B shown in FIG. 24, and uses the destination SIP address (the SIP address of the called terminal) included in the Invite message as the search key, and the telephone subscriber information table. 13B is searched (S4021). As a result of the search, if the data of the incoming SIP address cannot be detected, a “404 Not Found” message, which is one of the SIP messages, is transmitted to the calling terminal (S4022). As a result of the search, if the information of the corresponding SIP address can be detected, it is determined whether or not the management call control device IP address 22 stored in the telephone subscriber information table 13B is the IP address of the own device (S4023). ). As a result of the determination, if the management call control device IP address 22 is not its own device, the received Invite message is transferred to the device of the IP address registered in the management call control device IP address 22 (S4024). When the management call control device IP address 22 is its own device, the received Invite message is transmitted as it is to the called terminal (S4025).

  By processing in this way, according to the present embodiment, it is possible to prevent erroneous calls by detecting a connection request from a malicious caller and not accepting it.

The block diagram of the communication system in 1st embodiment of this invention The other block diagram of the communication system in 1st embodiment of this invention The block diagram which shows the structural example of the terminal in 1st embodiment of this invention. Explanatory drawing which shows the structural example of the telephone directory in 1st embodiment of this invention. The block diagram which shows the structural example of the call control apparatus in 1st embodiment of this invention. Explanatory drawing which shows the structural example of the telephone subscriber information table in 1st embodiment of this invention. Sequence diagram of registration in telephone subscriber information table in the first embodiment of the present invention Sequence diagram of registration in the telephone directory according to the first embodiment of the present invention Explanatory drawing which shows the Ringing message format in 1st embodiment of this invention. Explanatory drawing which shows the Cancel message format in 1st embodiment of this invention. Call connection sequence diagram in the first embodiment of the present invention Another call connection sequence diagram in the first embodiment of the present invention Call connection rejection sequence diagram in the first embodiment of the present invention Other call connection rejection sequence diagram in the first embodiment of the present invention Explanatory drawing showing the existing Invite message format Explanatory drawing which shows the Invite message format in 1st embodiment of this invention. Explanatory drawing showing the existing Decline message format Explanatory drawing which shows the Decline message format in 1st embodiment of this invention Explanatory drawing which shows the example of a message display in 1st embodiment of this invention Processing flow diagram of call control device in first embodiment of the present invention Processing flow diagram of call control device at the time of password option in the second embodiment of the present invention (No. 1) Processing flow diagram of call control device at the time of password option in the second embodiment of the present invention (part 2) Explanatory drawing which shows the Invite message format with an option in 2nd embodiment of this invention The block diagram which shows the structural example of the call control apparatus in 2nd embodiment of this invention. Explanatory drawing which shows the structural example of the telephone directory in 2nd embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 * 100-1 * 100-2 ... Terminal, 200 ... IP network, 1-1-1, 1-2 ... Call control apparatus, 10 ... Line interface, 11 ... Processor, 12 ... Display apparatus, 13 ... Telephone subscriber Information table, 14 ... counter, 15 ... statistical control information, 16 ... communication processing, 17 ... table search processing, 18 ... statistical timer processing, 19 ... input device, 50 ... memory, 40 ... communication interface, 41 ... processor, 42 ... Display device 43... Self-terminal information 44. Phone book 45. Communication process 46. Phone book registration process 47 Input device 60 Memory

Claims (7)

In a call control apparatus to which a plurality of subscriber terminals are connected,
Storage means for storing a plurality of address information of the subscriber terminal in association with user identification information for identifying a user of the subscriber terminal;
Extraction means for extracting address information of a connection destination subscriber terminal and user identification information of the subscriber terminal from a call connection request transmitted from the subscriber terminal;
The address information of the subscriber terminal of the connection destination extracted by the extracting means, the user identification information of the subscriber terminal, the address information of the subscriber terminal stored in the storage means, and the subscriber terminal Determination means for determining whether or not the user identification information matches,
A processing unit that performs a call connection process for the call connection request when the result of the determination by the determination unit matches, and performs an error response process for the call connection request when the result does not match; A call control device.   2. The call control device according to claim 1, further comprising registration means for receiving registration of address information of the subscriber terminal of the own device and user identification information of the subscriber terminal from the subscriber terminal. Call control device. The call control device according to claim 1, wherein a determination unit that determines a call control device that manages a connection destination subscriber terminal from a call connection request transmitted from the subscriber terminal;
If the result of determination by the determination means is that the connected subscriber terminal is a subscriber terminal managed by another call control device, transfer means for transferring the call connection request to the other call control device; The call control device further comprising:   2. The call control apparatus according to claim 1, wherein the processing means, as the error response process, provides the subscriber terminal that has transmitted the call connection request with the subscription corresponding to the address information of the connected subscriber terminal. Call notification characterized in that notification is made that the user identification information of the subscriber terminal does not match the user identification information of the subscriber terminal corresponding to the stored address information of the connected subscriber terminal apparatus. The call control device according to claim 1, wherein the storage means further stores password information predetermined in correspondence with address information of the subscriber terminal and user identification information of the subscriber terminal,
The extraction means includes, from a call connection request transmitted from the subscriber terminal, address information of the calling subscriber terminal, user identification information of the subscriber terminal, and password information of the subscriber terminal. Extract further,
The determining means stores in the storage means address information of the calling subscriber terminal extracted by the extracting means, user identification information of the subscriber terminal, and password information of the subscriber terminal. Further determining whether the address information of the calling subscriber terminal, the user identification information of the subscriber terminal, and the password information of the subscriber terminal match,
As a result of the determination by the determination means, the processing means stores address information of the calling subscriber terminal, user identification information of the subscriber terminal, and password information of the subscriber terminal in the storage means. When the stored address information of the subscriber terminal, the user identification information of the subscriber terminal, and the password information of the subscriber terminal match, call connection processing is performed for the call connection request, An error response process is further performed with respect to the call connection request when they do not match, the call control device. In a subscriber terminal connected to a call control device that performs call control,
Storage means for storing a plurality of address information of connection destination subscriber terminals and user identification information for identifying users of the subscriber terminals in association with each other;
Accepting means for accepting selection of address information of the connection destination from the address information of the subscriber terminal and a call connection request to the subscriber terminal of the connection destination;
Extraction means for extracting from the storage means user identification information of the subscriber terminal corresponding to the address information of the connection destination subscriber terminal received by the reception means;
A transmission means for transmitting the address information of the connection destination subscriber terminal extracted by the extraction means and the user identification information of the subscriber terminal to the call control device in a call connection request. A subscriber terminal. In a call control method for connecting a calling subscriber terminal and a connected subscriber terminal by a call control device for controlling a call,
A plurality of address information of the subscriber terminal and user identification information for identifying a user of the subscriber terminal are stored in association with each other,
From the call connection request transmitted from the subscriber terminal, the address information of the connected subscriber terminal and the user identification information of the subscriber terminal are extracted,
The address information of the extracted connection destination subscriber terminal, the user identification information of the subscriber terminal, the stored address information of the subscriber terminal, the user identification information of the subscriber terminal, To determine whether or not
A call control method comprising: performing a call connection process for the call connection request if the result of the determination is a match; and performing an error response process for the call connection request if the result is a mismatch. .

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