JP2010219656A - Communication system, session control server, and communication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication system, a session control server and a communication method, for providing a multiple telephone number service applicable to an NGN. <P>SOLUTION: The communication system includes: a first session control server for storing a contractor number which is a telephone number allocated to a subscriber and an additional number which is a telephone number added to the contractor number in correspondence for each subscriber, providing a prescribed service utilizing the correspondence of the contractor number and the additional number, and when receiving a connection request signal for which the additional number is the number of a caller, reading the contractor number corresponding to the additional number, adding the contractor number to the connection request signal and transmitting it; and a second session control server for receiving the connection request signal from the first session control server, and when the contractor number is added to the connection request signal, providing a prescribed service utilizing the contractor number. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a multiple telephone number service in a next generation network (hereinafter referred to as NGN).

  As described in Non-Patent Document 1, NGN (Next Generation Network) provides high-quality, flexible, and high-security communication services by combining optical fiber and IP (Internet Protocol) communication. Is desired. In addition, NGN services are required to be highly reliable, excellent in stability, safe and high in added value.

  Nippon Telegraph and Telephone Corporation (registered trademark) has already provided an INS Net 64 (registered trademark) service for transmitting digital signals using a telephone line as it is. The company has started a service that allows subscribers to have multiple phone numbers under a single contract with the additional number service "i number" (registered trademark). In this INS net 64 service, “2B + D” is provided as a physical line, and two calls can be made simultaneously. In the “i / number” service, the maximum number of telephone numbers that can be registered for each contractor is three.

  This “i-number” service assumes residents such as two-family houses and small shops as subscribers. For example, this service has demands such as “I want to have two households with different phone numbers”, “I want to have a separate FAX number”, and “I want to use my phone for work and private use in self-employment” Used by users.

  In order for NGN to develop, a service equivalent to or better than the multi-phone service (additional number service: “i-number”) previously provided by Nippon Telegraph and Telephone Corporation with the “INS Net 64 Service” will be provided. Is desirable.

“NTT Technical Journal 2007 Vol.19 No12“ NGN that Opens a Rich Broadband Ubiquitous Society ”, p.36-41

  However, at the present stage, NGN cannot provide a multiple telephone number service equivalent to or better than “INS Net 64 Service”.

  For example, in the “i-number” service of the INS net 64 described above, charges for a plurality of telephone numbers can be collectively charged. Also in NGN, it is preferable to realize a service for assigning a plurality of telephone numbers to one contractor and to enable charging in this manner.

  NGN is composed of a packet forwarding plane and a session control plane, and the session control plane is a new network composed of SSC and ISC two-level controllers.

  NGN is composed of a packet forwarding plane and a session control plane, and the session control plane is a new network composed of SSC and ISC two-level controllers. Therefore, the method for realizing the multiple telephone number service employed in the “INS Net 64 service” cannot be applied, and a new system and communication method must be devised.

  An object of the present invention is to realize a communication system, a session control server, and a communication method for providing a multi-phone number service applicable to NGN.

  In order to achieve the above object, the communication system of the present invention includes, for each subscriber, a subscriber number that is a telephone number assigned to the subscriber and an additional number that is a telephone number added to the subscriber number. Are stored in association with each other, provide a predetermined service using the association between the subscriber number and the additional number, and receive a connection request signal with the additional number as the caller's number, A first session control server that reads a subscriber number corresponding to the additional number, adds the subscriber number to the connection request signal, and transmits the connection request signal, and receives the connection request signal from the first session control server. A second session control server for providing a predetermined service using the contractor number if the contractor number is added to the connection request signal.

  The session control server according to the first aspect of the present invention provides, for each subscriber, a subscriber number that is a telephone number assigned to the subscriber, and an additional number that is a telephone number added to the subscriber number. And a connection request signal having the additional number as a caller's number is received, and a contractor number corresponding to the additional number is read from the storage means, and the contract is added to the connection request signal. Call processing means for adding and transmitting a subscriber number; and service providing means for providing a predetermined service using the association between the contractor number and the additional number stored in the storage means.

  The session control server according to a second aspect of the present invention includes: a receiving unit that receives the connection request signal; and the contractor number if the contractor number is added to the connection request signal received by the receiving unit. Service providing means for providing a predetermined service using a person number.

  The communication method of the present invention stores, for each subscriber, a subscriber number that is a telephone number assigned to the subscriber and an additional number that is a telephone number added to the subscriber number in association with each other. In addition, when a predetermined service using the subscriber number and the additional number is provided and a connection request signal having the additional number as the caller's number is received, the subscriber number corresponding to the additional number is read out, When the connection request signal is transmitted with the contractor number added, the connection request signal is received, and the connection request signal is appended with the contractor number, the call is made as the call for the contractor number. A method for executing call control with one session control server.

  According to the present invention, when the first session control server stores the contractor number and the additional number in association with each other and receives a connection request signal from the additional number, the contractor number corresponding to the additional number is obtained. Since the session control server provides a predetermined service using the contractor number by adding it to the connection request signal, a multi-phone number service applicable to NGN can be realized.

It is a block diagram of the multiple telephone number service of the 1st Embodiment of this invention. It is a system connection figure of a 1st embodiment of the present invention. It is a table | surface which shows the telephone service contract and SSC operation | movement pattern of the 1st Embodiment of this invention. It is a block diagram which shows the structure of SSC of the 1st Embodiment of this invention. It is an example of the subscriber table of the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of SSC of the 1st Embodiment of this invention. (A) It is a figure which shows the setting location of UNI of the 1st Embodiment of this invention, and NNI. (B) It is a figure which shows the UNI / NNI setting conditions at the time of the additional number transmission of the 1st Embodiment of this invention. (A) It is a sequence diagram which shows the multiple telephone number service of the 1st Embodiment of this invention. (B) It is a sequence diagram which shows the multiple telephone number service of the 1st Embodiment of this invention. It is a block diagram which shows the structure of SSC of the 2nd Embodiment of this invention. It is an example of the subscriber table of the 2nd Embodiment of this invention. It is an example of the separate table of the 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of SSC of the 2nd Embodiment of this invention. It is a system connection diagram of the 3rd embodiment of the present invention.

(First embodiment)
A first embodiment for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a configuration diagram of the present invention. In the NGN, a multiple telephone number service is realized by a configuration of an SSC (Subscriber Session Control Server) 4, a NAT (Network Address Translation) 5, a terminal device 6, and telephone terminals 7a to 7d.

  FIG. 2 shows a system connection diagram of the present invention. The NGN 1 is a QoS (Quality of Service) configured by the session control plane 2 and the packet transfer plane 3 and a comprehensive IP (Internet Protocol) network with improved security.

  The SSC 4 is a server that uses SIP as a communication protocol. As shown in FIG. 4, the SSC 4 checks the connection request signal received from the terminal device 6 with the telephone number, IP address, and port number in the session control plane table, confirms the validity of the number information, Enable to provide number service.

  Returning to FIG. 2, the NAT 5 is a device having a function of mutually converting the IP address on the terminal device 6 side into the IP address on the NGN 1 side, and conversely the IP address on the NGN 1 side into the IP address on the terminal device 6 side. is there.

  The terminal device 6 is an IP telephone terminal device that accommodates the telephone terminals 7a to 7d.

  When the incoming call is a PSTN user X (15), the connection request signal is SSC4, ISC (PSTN-GW) 8 (Intermediate Session Control server: PSTN gateway function of the relay session control server), PTSN 14 (Public Switched Telephone Network: public exchange) It is sent to the user X (15) via the telephone network.

  When the incoming call is NGN user Y (16), the connection request signal passes through SSC4 to SSC10 or SSC4 to ISC (pure relay) 9 (Intermediate Session Control server) to SSC10 and NAT11. Sent to user Y (16).

  FIG. 3 is a table summarizing telephone service contracts and SSC4 operation patterns. As shown in the figure, there are three types of operation patterns between the telephone service contract and the SSC 4.

  (1) Pattern 1: When there is no contract for an additional telephone number (hereinafter referred to as “additional number”) and there is a contract for only a contractor telephone number (hereinafter referred to as “contractor number”).

  (2) Pattern 2: When there is a contract of a contractor number and an additional telephone number.

  (3) Pattern 3: When there is no contract with the contractor number and the additional number.

  Pattern 2 is a pattern of a subscriber of a multiple telephone number service. When the contract of the contractor number is canceled, that is, when the subscriber stops the contract with the telecommunications carrier, the additional number is automatically cancelled. This corresponds to pattern 3.

  The case of pattern 1 will be described. The SSC 4 “permits” the transmission from the contractor number. Further, the SSC 4 returns “not permitted” (connection refused) to the terminal device 6 in response to the call from the additional number.

  The operation in the case of pattern 2 will be described. The SSC 4 “permits” the transmission from the contractor number. Further, the SSC 4 “permits” the transmission from the additional number. The SSC 4 adds transmission number information (contractor number information) indicating a contractor number corresponding to the additional number to the connection request signal, and sends it to the destination ISC or SSC.

  The operation in the case of pattern 3 will be described. The SSC 4 returns “not permitted” (connection refused) to the terminal device 6 in response to the call from the contractor number. The SSC 4 returns “not permitted” (connection refused) to the terminal device 6 in response to the call from the additional number.

  As shown in FIG. 4, the SSC 4 includes a session control function unit 41, a multi-phone number service control function unit 42 having a multi-phone number service processing unit 421, and a subscriber registration unit 43 having a subscriber table 431. The

  The maintenance person creates a subscriber table 431 based on the contract information and registers it in the subscriber registration unit 43.

  FIG. 5 shows an example of the subscriber table of the user A in the subscriber table 431. As shown in the figure, the subscriber table includes items of “telephone number”, “IP address”, “port number”, “contractor number”, and “contract category”. A similar subscriber table is registered in the subscriber registration unit 43 for each subscriber.

  The “telephone number” is a contractor number or an additional number assigned to a contractor (user). “IP address” and “port number” are an IP address and a port number assigned to the terminal of the user. The “contractor number” is a contractor number corresponding to the additional number when the telephone number is the additional number. The “contract category” is a category indicating whether the contracted telephone number is a contractor number or an additional number.

  For example, when “03-3311-XX10” is registered as the contractor number and “03-3311-XX11” is registered as the additional number for the contractor “A”, the “phone number” field of the contractor “03-3311-XX10” and “03-3311-XX11” are described. In the “contractor number” column corresponding to “03-3311-XX11”, “03-3301-XX10” is described. The “contractor classification” field corresponding to “03-3311-XX10” describes that it is a contractor number, and the “contractor classification” field corresponding to “03-3311-XX11” is an additional number. It is described.

  Returning to FIG. 4, the connection request signal transmitted from the subscriber number A7a or the additional number B7b of the user A (7) passes through the NAT5, the session control function unit 41 of the uniform SSC4, and the plurality of telephone number service control function units 42. It is sent to the telephone number service processing unit 421. The multiple telephone number service processing unit 421 collates the caller information on the connection request signal with the telephone number, IP address, and port number registered in the subscriber table 431 in the subscriber registration unit 43. If they do not match in the verification, that is, if the telephone number is not registered on the subscriber table 431, the connection request signal is rejected and a connection rejection signal is returned to the terminal device 6. In the verification with the caller information on the connection request signal, if they match, that is, if the validity of the caller ID information is confirmed, the multi-phone number service processing unit 421 and the session control function unit 41 send the incoming ISC or A connection request signal to the SSC or the like is sent, and the SSC 4 enters a normal call connection operation.

  Here, the multiple phone number service is a service that can be provided by subscribing to multiple phone numbers per household. Specifically, “multiple billing”, “simultaneous ringing (representative response)”, Services such as “notification of specified number”.

  “Batch billing” is a service in which calls with an additional number as a caller are collectively billed as calls with a subscriber number as a caller.

  “Beep ringing” is a service for ringing all telephones (such as 7a) all at once when an incoming call is received from either the subscriber number or the additional number.

  “Notification of designated number” is a service for notifying a connection destination of a subscriber number as a telephone number of a caller even when a call is made from an additional number.

  For example, when providing the collective billing service, the multi-phone number service processing unit 421 creates a CDR based on the caller's number, communication time, etc. after disconnecting the call. Here, when the caller number information is added to the connection request signal, the multiple telephone number service processing unit 421 creates a CDR using the contractor number indicated by the information as the telephone number of the caller.

  The operation of the SSC 4 will be described along the operation flowchart of the multiple telephone number service shown in FIG.

  A connection request signal is transmitted to the SSC 4 via the NAT5 from the contractor number A7 or the additional numbers B7b, C7c and D7c of the user A (7).

  The connection request signal is sent to the multiple telephone number service processing unit 421 of the multiple telephone number service control function unit 42 via the session control function unit 41. Here, it is determined whether or not the caller information on the connection request signal is registered in the subscriber table 431 in the subscriber registration unit 43 (step S1). If the caller's number is not registered (step S1: NO), the session control function unit 41 returns a connection refusal signal from the SSC 4 to the terminal device 6 as a call rejection (step S3). This operation corresponds to the operation of pattern 1 additional number transmission or the operation of pattern 3 subscriber number and additional number transmission.

  When the caller's number is registered in the subscriber table 431 (step S1: YES), the multiple telephone number service processing unit 421 determines whether the transmitted number is an additional number call (step S5). ), When the contractor number is transmitted (step S5: NO), the session control function unit 41 sends a connection request signal A from the SSC 4 to the destination ISC or SSC or the like as a transmission permission (step S7). This operation corresponds to the operation of transmitting the subscriber number of patterns 1 and 2.

  In the case of additional number transmission (step S5: YES), the multi-phone number service control function unit 42 adds the transmission number information of the additional number to the connection request signal (step S9), and SSC4 is a session control function as a transmission permission. The unit 41 sends a connection request signal B from the SSC 4 to the next ISC or SSC or the like (step S11). This operation corresponds to the operation of pattern 2 additional number transmission.

  Returning to FIG. 1, the terminal device 6 can notify the contractor number A7a or the additional numbers B7b, C7c, D7d, etc. as the caller number information, and notifies the SSC 4 after including the information in the connection request signal. .

  The SSC 4 sets a number for identifying the terminal that requested the incoming call in the connection request signal transmitted to the terminal device 6. For example, the SSC 4 sets indefinite national numbers “0AB to J” starting from 0.

  The distribution of contractor numbers will be described. FIG. 7A shows the positions of NNI (Network Network Interface) and UNI (User Network Interface: terminal interface). FIG. 7B is a table summarizing NNI and UNI setting conditions.

  The case where the call is made from the additional number B7b of the user A (7) will be described as an example.

  It is classified into the following four items according to the notification of the calling number and non-notification.

  (1) When the calling number is notified to item number 1.

  (2) When the calling number is not notified to item number 2.

  (3) When the calling number is not notified to the item number 3 by the 184 dial.

  (4) When calling number is notified to item number 4 by 186 dial.

  When calling from the additional number B7b of the user A (7), the terminal device 6 includes the information of the additional number “B” as an information element of the connection request signal regardless of whether the calling number is notified or not. Then, it transmits to SSC4.

  Regardless of whether the calling number is notified or not, the SSC 4 always transmits information on the NNI including information on the contractor number “A” and the additional number “B” as information elements on the connection request signal.

  More specifically, the multi-phone number service processing unit 421 in the multi-phone number service control function unit 42 in the SSC 4 checks the subscriber table 431 of the subscriber registration unit 43 to verify the validity of the caller ID. Confirm. “A” is set from the subscriber number in the subscriber table 431.

  Therefore, regardless of whether the calling number is notified or not, the contractor number “A” is always transmitted to the NNI as an information element on the connection request signal, so that the contractor number “A” is distributed throughout the network. Can be made.

  By distributing the subscriber number, the SSC 10 and the ISC 9 can use the subscriber number to provide a multiple telephone number service at the same level as or higher than the “INS Net 64 service”.

  For example, when the SSC 10 receives a call from the additional number, the SSC 10 notifies the connection destination of the contractor number corresponding to the additional number as the telephone number of the caller.

  FIG. 8 shows a sequence of the multiple telephone number service when the validity of the caller ID information is confirmed.

  FIG. 8A shows a sequence when the outgoing call is the subscriber number or additional number of NGN user A (7: multiple telephone number service contractor) and the incoming call is PSTN user X (15).

  When calling from the subscriber number or additional number of NGN user A (7: multiple telephone number service contractor), a connection request signal is sent to SSC4 in step T1, and collated with subscriber table 431 in SSC4 in step T2. Is done. When the validity of the calling number information is confirmed in this collation, a connection request signal reaches the PSTN user X (15) in step T3.

  A response is returned from PSTN user X (15) to SSC4 in step T4, and a response is sent to the subscriber number or additional number of NGN user A (7: multiple telephone number service contractor) who is the caller in step T5. The call is started in step T6 between the caller (the contractor number or additional number of NGN user A: 7) and the callee (PSTN user X: 15). Termination of the call is executed in steps T7 and T8.

  FIG. 8B shows a sequence when the outgoing call is the subscriber number or additional number of the user A (7: multiple telephone number service contractor) who is NGN and the incoming call is the NGN user Y (16).

  When calling from the subscriber number or additional number of NGN user A (7: multiple telephone number service contractor), a connection request signal is sent to SSC4 in step T1, and collated with subscriber table 431 in SSC4 in step T2. Is done. When the validity of the transmission number information is confirmed in this collation, a connection request signal reaches NGN user Y (16) via ISC9 and SSC10 in step T31.

  A response is returned from NGN user Y (16) to SSC4 in step T41, and a response is sent to the subscriber number or additional number of NGN user A (7: multiple telephone number service contractor) who is the caller in step T5. The call is started in step T61 between the caller (the contractor number or additional number of NGN user A: 7) and the callee (NGN user Y: 16). Termination of the call is executed in steps T71 and T8.

  According to the present embodiment, a higher level multi-telephone number service is provided in NGN which is configured by a packet control plane and a session control plane, and the session control plane is realized by a two-stage control device of SSC and ISC. It becomes possible to do.

  In NGN, one contractor can have a plurality of telephone numbers, and it is possible to use a telephone number for each individual in a family or to have a telephone number dedicated for FAX. Also, small businesses can use a plurality of telephones and one or more FAX telephone numbers properly.

  In INS Net 64, there is only a 2B + D contract as a physical line, and the maximum number of contracts for multiple telephone numbers is up to a maximum of three telephone numbers. Can be selected flexibly according to the situation.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS. FIG. 9 is a block diagram showing the configuration of the SSC 4a of this embodiment. As shown in the figure, the SSC 4 a includes a session control function unit 41, a multiple phone number service control function unit 42 including a multiple phone number service processing unit 421 and a multiple phone number table registration unit 422, and a telephone service subscription determination unit 44. And a subscriber registration unit 43 having a subscriber table 431a. An individual table 4221 is registered in the multiple telephone number table registration unit 422.

  Based on the contract information, the maintenance person creates the subscriber table 431a, creates the individual table 4221 for the subscriber registration unit 43 and the multi-phone number service registration, and registers it in the multi-phone number table registration unit 422.

  FIG. 11 shows an example of the subscriber table of the user A in the subscriber table 431a. Referring to the figure, in the subscriber table 431a, only “telephone number”, “IP address”, and “port number” columns are provided, and “contractor number” and “contract category” are not provided. A similar subscriber table is registered in the subscriber registration unit 43 for each subscriber.

  An example of the individual table of user A among the individual tables 4221 is shown in FIG. Referring to the figure, the individual table is provided with “telephone number”, “IP address”, “port number”, “contractor number”, and “contract category”.

  Returning to FIG. 9, the connection request signal transmitted from the subscriber number A7a or the additional number B7b of the user A (7) is sent to the telephone service subscription determination unit 44 via the NAT5 and the session control function 41 of the uniform SSC4. The telephone service subscription determination unit 44 collates the caller information on the connection request signal with the telephone number, IP address, and port number registered in the subscriber table 431a in the subscriber registration unit 43. That is, if the telephone number is not registered on the subscriber table 431a, the connection request signal is rejected and a connection rejection signal is returned to the terminal device 6. If it matches with the caller information on the connection request signal, that is, if the telephone number is registered on the subscriber table 431a, the telephone number service processing unit 421 of the plural telephone number service control function unit 42 Multiple telephone number service processing after being sent and collated with the telephone number, IP address, and port number of the individual table 4221 in the multiple telephone number table registration unit 422 and confirmed. The connection request signal is sent from the receiving side ISC to the receiving side ISC or SSC from the unit 421 / session control function unit 41, and the normal call connection operation starts.

  The operation of the SSC 4a will be described along the flowchart shown in FIG. Referring to the figure, the operation of SSC 4a is the same as the operation of SSC 4 of the first embodiment except that steps S1a and S5a are executed instead of steps S1 and S5.

  In step 1 a, the telephone service subscription determination unit 44 determines whether the caller information on the connection request signal is registered in the subscriber table 431 a in the subscriber registration unit 43.

  In step S5a, the multiple telephone number service processing unit 421 refers to the individual table 4221 and determines whether the transmitted number is an additional number transmission.

  As described above, according to the present embodiment, since the SSC 4 divides and manages the subscriber table, the subscriber table can be easily updated in accordance with addition, deletion, and change of the additional number.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIG. This figure is a system connection diagram of this embodiment. Referring to the figure, a billing apparatus 20 is further connected to NGN 1 of the present embodiment.

  In the present embodiment, when the SSC 4 receives a call from an additional number, the SSC 4 reads out a contractor number corresponding to the additional number from the subscriber registration unit 43. Further, if the calling number information is added to the connection request signal, the SIP server such as the SSC 10 stores the contractor number indicated by the information. Then, after the call is established, the SSC 4 or the like creates a CDR (Call Detail Record) for the call using the contractor number as the caller telephone number.

  The billing apparatus 20 collects CDRs from the SSC 4 and creates billing information for billing the contractor based on the CDRs.

  As described above, the SIP server such as the SSCs 4 and 10 creates a CDR using the subscriber number indicated by the information if the calling number information is added to the connection request signal. 20 can reliably charge the subscriber based on its CDRs.

  On the other hand, in a general communication system that does not circulate calling number information, each SSC and ISC other than the SSC that accepts registration of the additional number is linked to the additional number for outgoing calls from the additional number. The subscriber number cannot be obtained and the call cannot be charged in a lump sum.

1 NGN
2 Session control plane 3 Packet forwarding plane 4, 4a, 10 SSC
5, 11 NAT
6 Terminal device 7 User A
7a, 7b, 7c, 7d Telephone terminal 8, 9 ISC
13 MG
14 PSTN
15 User X
16 User Y
DESCRIPTION OF SYMBOLS 20 Billing apparatus 41 Session control function part 42 Multiple telephone number service control function part 43 Subscriber registration part 44 Telephone service subscription determination part 421 Multiple telephone number service processing part 422 Multiple telephone number service registration part 431, 431a Subscriber table 4221 Individual table S1-S11, T1-T8, T31, T61, T71 steps

Claims (10)

For each subscriber, a subscriber number that is a telephone number assigned to the subscriber and an additional number that is a telephone number added to the subscriber number are stored in association with each other, and the subscriber number and If a predetermined service using the association of the additional number is provided and a connection request signal having the additional number as a caller's number is received, the contractor number corresponding to the additional number is read out and the connection request is received. A first session control server that transmits the signal with the subscriber number added thereto;
Second session control for receiving a connection request signal from the first session control server and providing a predetermined service using the contractor number if the contractor number is added to the connection request signal Server,
A communication system.   At least one of the first session control server and the second session control server creates call detail record information for the call established based on the connection request signal, using the subscriber number as the telephone number of the caller, The communication system according to claim 1.   A charging device that acquires the call detail record information created by the first session control server or the second session control server and creates billing information for charging a contractor based on the call detail record information The communication system according to claim 2, further comprising: The first session control server corresponds to the subscriber table describing a telephone number contracted for each subscriber, a classification indicating whether the telephone number is a subscriber number or an additional number, and the additional number. An individual table showing the contractor number is stored,
If the telephone number of the source of the connection request signal is described in the subscriber table, refer to the individual table, determine whether the telephone number is an additional number, and if it is an additional number, The communication system according to any one of claims 1 to 3, wherein the subscriber number corresponding to the additional number is read. Storage means for storing for each subscriber a contractor number, which is a telephone number assigned to the subscriber, and an additional number, which is a telephone number added to the subscriber number, in association with each other;
When a connection request signal having the additional number as the caller's number is received, call processing for reading out the contractor number corresponding to the additional number from the storage means and adding the contractor number to the connection request signal for transmission Means,
Service providing means for providing a predetermined service using the association between the contractor number stored in the storage means and the additional number;
A session control server.   The service providing means includes call detail information creating means for creating call detail record information for the call established based on the connection request signal received by the call processing means, using the subscriber number as the telephone number of the caller. The session control server according to claim 5, further comprising: The storage means includes a subscriber table describing a telephone number contracted for each subscriber, a classification indicating whether the telephone number is a subscriber number or an additional number, and a subscriber number corresponding to the additional number; And an individual table indicating
The call processing means refers to the individual table if the telephone number of the connection request signal source is described in the subscriber table, determines whether the telephone number is an additional number, and adds The session control server according to claim 5 or 6, wherein if it is a number, the contractor number corresponding to the additional number is read out. Receiving means for receiving the connection request signal;
If the contractor number is added to the connection request signal received by the receiving means, service providing means for providing a predetermined service using the contractor number;
A session control server. For each subscriber, a subscriber number that is a telephone number assigned to the subscriber and an additional number that is a telephone number added to the subscriber number are stored in association with each other,
Provide a predetermined service using the subscriber number and additional number,
If a connection request signal with the additional number as the caller's number is received, the contractor number corresponding to the additional number is read out,
Add the subscriber number to the connection request signal and send it,
Receiving the connection request signal;
A communication method for providing a predetermined service using the subscriber number if the subscriber number is added to the connection request signal.   10. The communication method according to claim 9, wherein for a call established based on the connection request means, call detail record information is created using the subscriber number as a telephone number of a caller.

Images