JP2013005081A - Sip communication system and sip communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a service upgrading and expanding through session control by coordinating a quality guarantee-type network and a best effort-type network.SOLUTION: A SIP communication system according to the invention comprises: a base point installation device 200 connected to a quality guarantee-type SIP exclusive network 300 and a best effort-type general-purpose network 400; a service integration device 100 connected to the base point installation device 200 via the best effort-type general-purpose network 400. The service integration device 100 comprises a database 102 for storing a service to be provided for a user. If the base point installation device 200 has received a SIP message from the quality guarantee-type SIP exclusive network 300, it transmits the SIP message to the service integration device 100. The service integration device 100 determines a service to be provided for the user who is a destination of the SIP message, and performs an instruction corresponding to the determined service to the base point installation device 200.

Description

  The present invention relates to a SIP communication system and a SIP communication method, and more particularly to a SIP communication system and a SIP communication method that use both a quality assurance type SIP dedicated NW and a best-effort general-purpose NW.

  In a telephone service using SIP (see Non-Patent Document 2), session control by SIP is performed. In a telephone service by a public network having a quality assurance function, a SIP message that can be used is defined from the viewpoint of interconnection, and a SIP message out of specification does not pass (for example, see Non-Patent Document 1). On the other hand, some business telephones and PBXs have their own functional extensions that are not based on standards, and in-site communication and communication on the VPN have their own expanded session control. Since the best effort type NW is used, call quality cannot be guaranteed.

East Nippon Telegraph and Telephone Corporation, West Nippon Telegraph and Telephone Corporation, "IP Communication Network User / Network Interface (UNI)", [online], October 25, 2007, Internet <URL: http://tokkyo.shinsakijun.com/ information / newtech.html> "RFC3261: SIP: Session Initiation Protocol", [online], June 2002, <URL: http://www.ietf.org/rfc/rfc3261.txt> "RFC3966: The tel URI for Telephone Numbers", [online], December 2004, <URL: http://www.ietf.org/rfc/rfc3966.txt>

  A quality-guaranteed SIP-dedicated NW in which a SIP message is specified allows a high-quality call. However, since a SIP message outside the specification does not pass, the session control uniquely expanded by the PBX does not work. On the other hand, in the best-effort general-purpose NW that can freely expand SIP messages, it is easy to provide a new telephone function by session control uniquely expanded by PBX, but call quality is not guaranteed.

  In an environment where two types of NWs can be used: a quality assurance SIP-dedicated NW in which SIP messages are specified and a best-effort general-purpose NW that can freely expand SIP messages, call quality and session control expandability are 2 As a result, it was impossible to provide a telephone service in which call quality was guaranteed and session control could be easily expanded.

  Therefore, the object of the present invention made in view of such points is to use two types of NWs, a quality assurance type SIP dedicated NW in which SIP messages are defined and a best effort type general purpose NW that can freely expand SIP messages. It is to realize a SIP communication system and a SIP communication method that can easily expand services by session control for communication related to a quality assurance type SIP-dedicated NW in a difficult environment.

  In order to solve the above-described problems, a SIP communication system according to the present invention includes an in-base installation device connected to a quality assurance type SIP dedicated NW and a best effort general purpose NW, and the base via the best effort general purpose NW. A SIP communication system comprising a service integration device connected to an in-house installation device, wherein the service integration device comprises a database for storing a service to be provided to a user, and the in-site installation device comprises the quality assurance type When a SIP message arrives from a SIP-dedicated NW, the SIP message is transmitted to the service integration device, and the service integration device determines a service to be provided to a user who is a destination of the SIP message, and the determined An instruction corresponding to a service is given to the on-site installation apparatus.

  In the SIP communication system according to the present invention, the database of the service integration apparatus stores a transfer destination telephone number of the user, and the service integration apparatus transmits a call to a user who is a destination of the SIP message. When the service is a transfer service, it is desirable to transmit a transfer destination telephone number for the user to the in-base apparatus.

  Further, in the SIP communication system according to the present invention, the database of the service integration device stores a location base telephone number of the other base of the user, and the service integration device is used as a destination of the SIP message. When the service to the user is an incoming call service at another site, it is desirable to transfer the SIP message to the in-site installation device at the other site based on the location phone number of the other site for the user.

  In the SIP communication system according to the present invention, the database of the service integration device stores a location base telephone number of a first site installation device, and a second site installation device stores the first site. When the SIP message is transmitted to the extension number managed by the on-premises apparatus, the SIP message is transmitted to the service integration apparatus. When the service integration apparatus receives the SIP message, the service integration apparatus receives the SIP message. It is desirable to transmit a new SIP message including the location base telephone number and the extension number to the second base installation apparatus.

  Further, the SIP communication method according to the present invention includes a base station installation device connected to a quality assurance type SIP dedicated NW and a best effort general purpose NW, and a service connected to the base site installation device via the best effort general purpose NW. A SIP communication method in a SIP communication system comprising: an integration device, wherein the service integration device stores a service provided to a user; and the in-site installation device is connected to the quality assurance SIP dedicated NW When a SIP message arrives, the step of transmitting the SIP message to the service integration device, and the service integration device determines a service to be provided to a user who is the destination of the SIP message, and the determined service Providing a corresponding instruction to the on-site installation device. And butterflies.

  In the SIP communication method according to the present invention, the service integration device stores the transfer destination telephone number of the user, and the service integration device provides a service to the user who is the destination of the SIP message. Is a transfer service, the method preferably includes a step of transmitting a transfer destination telephone number for the user to the in-base apparatus.

  The SIP communication method according to the present invention includes a step in which the service integration device stores a location base telephone number of the other base of the user, and a user to which the service integration device is a destination of the SIP message. When the service to the other site is an incoming call service at another site, it is desirable to include the step of transferring the SIP message to a device installed at the site at the other site based on the location phone number of the other site for the user. .

  Further, in the SIP communication method according to the present invention, the service integration device stores a location base telephone number of the first site installation device, and a second site installation device uses the first site installation device. When the SIP message is transmitted to the extension number managed by the service integration device, the step of transmitting the SIP message to the service integration device; and when the service integration device receives the SIP message, the location of the first on-site installation device is Preferably, the method includes a step of transmitting a new SIP message including a base telephone number and the extension number to the second base-installed device.

  According to the SIP communication system and the SIP communication method according to the present invention, two types of NWs can be used: a quality assurance type SIP dedicated NW in which a SIP message is defined and a best effort general purpose NW that can freely expand the SIP message. In a difficult environment, it is easy to expand services by session control for communication related to quality assurance type SIP-dedicated NWs.

It is a figure which shows schematic structure of the SIP communication system which concerns on one Embodiment of this invention. It is a figure which shows the base registration information on a service integration apparatus. It is a figure which shows the user information on a service integration apparatus. It is a figure which shows the base registration information on the installation apparatus in a base. It is a figure which shows the user information on the installation apparatus in a base. It is a figure which shows service setting information. It is a figure which shows user service setting information. It is a figure which shows service setting notification information. It is a figure which shows the process sequence in Example 1. FIG. FIG. 10 is a diagram illustrating a processing sequence according to the second embodiment. FIG. 10 is a diagram illustrating a processing sequence according to a third embodiment. FIG. 10 is a diagram illustrating a processing sequence according to a third embodiment. It is a figure which shows the process sequence in Example 4. FIG. It is a flowchart of the incoming call process of a SIP communication system. 10 is a flowchart of a “transfer” service according to the second embodiment. 10 is a flowchart of an “other site incoming” service according to the third embodiment. It is a flowchart of the transmission process of a SIP communication system.

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

  FIG. 1 is a diagram showing a schematic configuration of a SIP communication system according to an embodiment of the present invention. The SIP communication system includes a service integration device 100, an in-site installation device 200, a quality assurance type SIP dedicated NW 300, a best effort general purpose NW 400, an IP telephone 500, and a PC 600. The quality assurance type SIP dedicated NW 300 is, for example, a carrier network of a telecommunications carrier, and the best effort type general-purpose NW 400 is, for example, the Internet.

  The service integration device 100 includes an all-user management function unit 101, a service integration device DB 102, an off-network SIP server function unit 103, a user information transmission function unit 104, and a portal function unit 105, and passes through a best-effort general-purpose NW 400. And it communicates with the installation apparatus 200 in a base installed in each base.

  The all-user management function unit 101 is a function that returns information stored in the service integration device DB 102 in response to an inquiry from the in-site installation device 200 via the off-network SIP server function unit 103.

  The service integration device DB 102 is a database that stores all bases and users who use the SIP communication system according to the present invention. Information is registered in the service integration apparatus DB 102 through the portal function unit 105, and the information is searched through the all user management function unit 101. As information stored in the service integration apparatus DB 102, “base registration information on the service integration apparatus” shown in FIG. 2, “user information on the service integration apparatus” shown in FIG. 3, and “service setting” shown in FIG. Information "and" user service setting information "shown in FIG.

  The off-network SIP server function unit 103 corresponds to a “server” defined in Non-Patent Document 2. However, a function for making an inquiry to the all-user management function 103 is added as necessary.

  The user information transmission function unit 104 receives the user information registered through the portal function unit 105 via the best-effort general-purpose NW 400 and the user information reception function unit of the in-site installation apparatus 200 installed at each site. 221 is provided.

  The portal function unit 105 provides functions for setting the service integration apparatus 100 itself and registering user information.

  The intra-site installation apparatus 200 includes a SIP communication function unit 210 and other communication function unit 220. The SIP communication function unit 210 includes a SIP server distribution function unit 211, a site user management function unit 213, a site installation device DB 214, and a site SIP server function unit 215. The other communication function unit 220 is a user. The information receiving function unit 221 and the site installation device setting function unit 222 are configured.

  The SIP server distribution function unit 211 is a function that distributes a received SIP message to an appropriate SIP server. The SIP server distribution function unit 211 communicates with the in-site SIP server function unit 215, the off-network SIP server function unit 103, and the in-network SIP server function unit 301.

  The in-site user management function unit 213 is a function that returns information stored in the in-site installation apparatus DB 214 in response to an inquiry from the in-site SIP server function 215.

  The in-site installation apparatus DB 214 is a database that stores users in the base that use the SIP communication system according to the present invention. Information is registered in the site installation device DB 214 via the user information reception function unit 221 or through the site installation device setting function unit 222, and information is retrieved through the site user management function unit 213. Information stored in the site installation apparatus DB 214 includes “location registration information on the site installation apparatus” shown in FIG. 4 and “user information on the site installation apparatus” shown in FIG.

  The intra-site SIP server function unit 215 corresponds to a “server” defined in Non-Patent Document 2. However, a function for making an inquiry to the in-site user management function unit 213 is added if necessary.

  The user information reception function unit 221 receives user information from the user information transmission function unit 104 included in the service integration apparatus 100 and stores it in the in-site installation apparatus DB 214.

  The in-site installation apparatus setting function unit 222 provides a function that allows the setting of the in-base installation apparatus 200 itself and registration of user information in the base.

  Hereinafter, the operation of each component will be described together with the processing sequence. In the following description, “base registration information on the service integration device” and “user information on the service integration device” held by the service integration device 100 are respectively referred to as “base registration information (FIG. 2)” and “user”. “Information (FIG. 3)” and “base registration information on the base installation device” and “user information on the base installation device” held by the base installation device 200 are respectively referred to as “base registration information (FIG. 4)”. And “user information (FIG. 5)”. Each SIP message described in the following description corresponds to the message described in Non-Patent Document 2.

Example 1
Embodiment 1 that is the basis of the present invention will be described below. FIG. 9 is a diagram illustrating a processing sequence according to the first embodiment.

(Setting / registration of equipment installed in the site)
The user of the SIP communication system registers the base registration information (FIG. 2) through the portal function unit 105 to the service integration apparatus 100 (step S101). The portal function unit 105 stores this information in the service integration device DB 102 (step S102).

  Further, the user of the SIP communication system registers the base registration information (FIG. 4) through the base installation apparatus setting function unit 222 with respect to the base installation apparatus 200 (step S111). The site installation device setting function unit 222 stores this information in the site installation device DB 214 (step S112). This work may be performed at the place where the in-site installation apparatus 200 is installed, or may be sent to the place where the in-site installation apparatus 200 is installed after setting.

(REGISTER installed at the site)
The intra-site SIP server function unit 215 provided in the intra-site installation apparatus 200 acquires necessary information from the quality assurance type SIP dedicated NW 300 at an arbitrary timing (for example, when connected to the quality assurance type SIP dedicated NW 300). The SIP REGISTER message is transmitted to the intra-network SIP server function unit 301 (step S121).

  The intra-site SIP server function unit 215 sends the SIP server function unit 103 provided in the service integration apparatus 100 via the SIP server distribution function unit 211 to the SIP server function unit 103 provided at any timing (for example, when the best-effort general-purpose NW400 is connected). A REGISTER message is transmitted (step S122).

  When the SIP server function unit 103 outside the network receives the SIP REGISTER message issued by the in-site installation apparatus 200, the out-of-network SIP server function unit 103 sends the received contents and the base registration information (FIG. 2) (for example, group identifier and password) stored in the service integration apparatus DB102. Collation is performed (step S123), and whether or not registration is possible is returned to the intra-site SIP server function unit 215 that has transmitted the SIP REGISTER message through the best-effort general-purpose NW400.

  When registration is possible, the off-network SIP server function unit 103 extracts the IP address of the best-effort general-purpose NW 400 side of the in-site installation device 200 extracted from the SIP REGISTER message, and displays “inside site” in the site registration information (FIG. 2). It is stored in “Installation Device IP Address”. However, this operation is not executed when “automatic assignment of the IP device installed in the site” is OFF.

  In this way, the on-site installation device 200 is REGISTERed by both the quality assurance type SIP dedicated NW 300 and the best effort type general purpose NW 400. It is assumed that the registered NW service operates even if only one of them is registered.

(User information registration)
User information on the service integration apparatus 100 (FIG. 3) and user information on the site installation apparatus 200 (FIG. 5) are registered through the portal function unit 105 provided in the service integration apparatus 100.

  First, the portal function unit 105 stores the received user information (FIG. 3) in the service integration apparatus DB 102 (steps S131 and S132), and the “location phone number” of the user information (FIG. 3) matches. User information is transmitted to the user information transmission function part 104 of the in-site installation apparatus 200 (step S133). However, the “location phone number” of the user information (FIG. 3) remains blank at this point.

  The user information transmission function unit 104 creates user information (FIG. 5) on the site installation device 200 from the received user information (FIG. 3), and through the best effort general-purpose NW 400, the site installation device 200. Is transmitted to the user information receiving function unit 221 included in (step S134). The user information receiving function unit 221 stores the received user information (FIG. 5) in the in-site installation apparatus DB 214 (step S135).

  Note that the user registration operation to the service integration apparatus DB 102 and the user registration operation to the in-site installation apparatus DB 214 do not have to be continuous. When there are a plurality of bases, the user registration operation in the base installation apparatus DB 214 is repeated for each base.

(IP phone REGISTER)
When receiving the SIP REGISTER message from the IP telephone 500 (step S141), the in-site SIP server function unit 215 provided in the in-site installation device 200 stores the received SIP REGISTER message and the in-site installation device DB 214. User information (FIG. 5) (for example, a user identifier and a user password) is collated (step S142), and registration permission is returned to IP phone 500. If registration is possible and the “inquiry function to the service integration device” of the user information (FIG. 5) is OFF, the IP telephone 500 transmits a call to the quality assurance type SIP dedicated NW 300 at this time.・ You can receive incoming calls.

  When registration is possible, the SIP server function unit 215 in the base station receives the SIP REGISTER message issued from the IP telephone 500, passes through the best effort general-purpose NW 400 through the SIP server distribution function unit 211, and functions as the SIP server function outside the network. The SIP REGISTER message is transmitted to unit 103 (step S143). The SIP server function unit 103 outside the network compares this SIP REGISTER message with the user information (FIG. 3) stored in the service integration device DB 102, and returns whether or not registration is possible to the SIP server function unit 215 in the base.

  When registration is possible, the off-network SIP server function unit 103 extracts the IP address of the best-effort general-purpose NW 400 side of the in-site installation device 200 from the received SIP REGISTER message, and displays “inside site” in the site registration information (FIG. 2). It collates with “installation apparatus IP address” (step S144). The off-network SIP server function unit 103 searches for the “base representative telephone number” from the matching IP address, and stores it in the “location base telephone number” of the user information (FIG. 3). If the IP telephone 500 succeeds in REGISTER to the off-network SIP server function unit 103 in this way, the user can use the service provided by the service integration apparatus 100.

  Here, for comparison with the following embodiments, an incoming / outgoing procedure when the service integration apparatus 100 is not used (when the “inquiry function to the service integration apparatus” is OFF) will be described.

(Incoming call when “Inquiry Function to Service Integration Device” is OFF)
When the IP phone 500 receives an incoming call from the quality assurance type SIP dedicated NW 300, the in-site SIP server function unit 215 extracts the destination telephone number or user identifier from the received SIP INVITE message, and the in-site user It transmits to the management function unit 213. The in-site SIP server function unit 215 suspends the operation until there is a reply from the in-site user management function unit 213 or until a preset time elapses.

  The site user management function unit 213 that has received the destination telephone number or user identifier transmitted by the site SIP server function unit 215 refers to the user information (FIG. 5) in the site installation device DB 214, When the “inquiry function to the service integration device” of the corresponding destination is OFF, the instructing unit instructs the intra-site SIP server function unit 215 to make an incoming call to the intra-site IP telephone 500. Note that the case where the “inquiry function to the service integration device” is ON is described in the second embodiment.

  If the incoming instruction transmitted by the in-site user management function unit 213 is received or no response is received from the in-site user management function unit 213 and a preset time has elapsed, the in-site SIP server function unit 215 Transmits a SIP INVITE message to IP telephone 500. The subsequent operations of the intra-site SIP server function unit 215 and the IP telephone 500 follow the standard telephone operation (Non-Patent Document 2).

(Transmission when “Inquiry Function to Service Integration Device” is OFF)
The intra-site SIP server function unit 215 that has received the SIP INVITE message transmitted by the IP telephone 500 extracts the caller's telephone number or user identifier from the received SIP INVITE message, and the intra-site user management function unit To 213. The in-site SIP server function unit 215 suspends the operation until there is a reply from the in-site user management function unit 213 or until a preset time elapses.

  The intra-site user management function unit 213 that has received the caller telephone number or the user identifier transmitted by the intra-site SIP server function unit 215 sends an SIP INVITE message to the intra-site SIP server function unit 215. The server function unit 301 is instructed to transfer.

  When the call instruction transmitted by the in-site user management function unit 213 is received or when there is no response from the in-site user management function unit 213 and a preset time has elapsed, the in-site SIP server function unit 215 A SIP INVITE message is transmitted to the SIP server distribution function unit 211.

  The SIP server distribution function unit 211 determines the transmission destination of the SIP INVITE message from the received SIP INVITE message using the destination telephone number or user identifier, and transmits it to the SIP server function unit 301 in the network. To do. The subsequent operations of the intra-site SIP server function unit 215 and the IP telephone 500 follow the standard telephone operation (Non-Patent Document 2).

(Example 2)
In the second embodiment, when the operation of the REGISTER of the in-site installation apparatus 200 and the IP telephone 500 described in the first embodiment is successful, the user information (FIG. 5) of the in-site installation apparatus 200 indicates “to service integration apparatus”. If the "inquiry function" is ON and "use service" in the user information (Fig. 3) on the service integration device 100 is set to "transfer", it is fixedly installed at each site. The incoming call operation to the IP telephone 500 is shown. FIG. 10 is a diagram illustrating a processing sequence according to the second embodiment.

(Transfer information setting)
The user needs to make the following settings before using the telephone transfer service provided by the service integration apparatus 100. The user uses the PC 600 to transmit “user service setting information (FIG. 7)” to the portal function unit 105 on the service integration apparatus 100 via the best-effort general-purpose NW 400 (step S201).

  Upon receiving the user service setting information (FIG. 7), the portal function unit 105 checks the user information (FIG. 3) in the service integration apparatus DB 102, and the user whose “user identifier” and “user password” match. The “use service identifier” and “transfer destination telephone number” described in the user service setting information (FIG. 7) are stored in the “use service identifier” and “transfer destination telephone number” of the information (FIG. 3) (steps) S202).

  Next, the portal function unit 105 calls the user information transmission function unit 104 (step S203), and via the best effort general-purpose NW 400, the user information reception function unit 221 of the in-site installation apparatus 200 receives “service setting”. Notification information (FIG. 8) "is transmitted (step S204).

  Upon receiving the service setting notification information (FIG. 8), the user information receiving function unit 221 performs the “inquiry function to the service integration device” in which the “user identifier” of the user information (FIG. 5) of the in-site installation device DB 214 matches. The contents described in “Inquiry Function to Service Integration Device” of the service setting notification information (FIG. 8) are stored (Step S205). In this way, the “transfer” service provided by the service integration apparatus 100 to the user can be used.

(Incoming call after setting forwarding service)
When the in-site SIP server function unit 215 receives the SIP INVITE message (step S211) from the quality assurance type SIP dedicated NW 300 to the IP telephone 500 (step S212), the in-site SIP server function unit 215 includes the received SIP INVITE message. The telephone number or user identifier of the called party is extracted from the information and transmitted to the in-base user management function unit 213 (step S213). The in-site SIP server function unit 215 suspends the operation until there is a reply from the in-site user management function unit 213 or until a preset time elapses.

  The site user management function unit 213 that has received the destination telephone number or user identifier transmitted by the site SIP server function unit 215 refers to the user information (FIG. 5) in the site installation apparatus DB 214 ( In step S214, the SIP INVITE message is transferred to “inquiry telephone number to the service integration device” of the corresponding destination (step S215).

  Upon receiving the SIP INVITE message, the off-network SIP server function unit 103 extracts an identifier indicating the IP telephone 500 included in the SIP INVITE message, and transmits it to the all-user management function unit 101 (step S216).

  The all-user management function unit 101 searches for “user identifier” in the user information (FIG. 3) of the service integration device DB 102 that matches the identifier indicating the IP phone 500 included in the received SIP INVITE message. The “use service identifier” described in “user identifier” is extracted (step S217).

  When the usage service identifier indicates “transfer”, the all-user management function unit 101 further extracts the “transfer destination telephone number” of the user information (FIG. 3) and sets the SIP address to the transfer destination with the highest priority. An instruction is issued to the off-network SIP server function unit 103 to transfer the INVITE message (step S218).

  The off-network SIP server function unit 103 transmits a SIP INVITE message to the in-site SIP server function unit 215 via the best-effort general-purpose NW 400 (step S219), and the in-site SIP server function unit 215 receives the message. The SIP INVITE message is transferred to the transfer destination via the SIP server distribution function unit 211 (step S220).

  The SIP server distribution function unit 211 that has received the transfer of the SIP INVITE message determines the transmission destination of the SIP INVITE message, and transmits it to either the in-network SIP server function unit 301 or the out-of-network SIP server function unit 103.

  If the transfer destination telephone does not respond to this transfer, the intra-site SIP server function unit 215 transmits a SIP CANCEL message to the off-network SIP server function unit 103. Then, the off-network SIP server function unit 103 asks the all user management function unit 101 for the next operation, and the all user management function unit 101 transfers the SIP INVITE message to the transfer destination having the second highest priority. An instruction is issued to the off-network SIP server function unit 103. In this way, the transfer process is repeated for the transfer destination telephone number stored in the user information (FIG. 3) until the transfer destination telephone answers.

  When the transfer destination telephone responds during the transfer process, the subsequent operations of the SIP server function unit 215 in the base and the IP telephone 500 follow the standard telephone operation (Non-patent Document 2). Also, if the transfer destination telephone does not respond even if the transfer process is repeated for the transfer destination telephone number stored in the user information (FIG. 3), “ Next to “transfer”, the process proceeds to the processing of the service identifier with the highest priority.

(Example 3)
In the third embodiment, when the REGISTER operation of the in-site installation apparatus 200 and the IP telephone 500 described in the first embodiment is successful, “service integration apparatus” of the user information (FIG. 5) on the in-site installation apparatus 200 is used. IP phone 500 when “inquiry function to” is ON and “use service identifier” of the user information (FIG. 3) on service integration apparatus 100 is set. Shows an incoming call operation when is temporarily moved from the affiliated base (base A) to another base (base B). 11 and 12 are diagrams illustrating a processing sequence according to the third embodiment.

(UnRegister operation at site A and Regster operation at site B)
When the IP phone 500 mainly used at the site A is removed, the SIP re-Register message does not reach the in-site SIP server function unit 215A or the off-network SIP server function unit 103, so that the IP phone 500 is in an unregistered state. (Non-Patent Document 2).

  The off-network SIP server function unit 103 notifies the all user management function unit 101 that the IP telephone 500 has become unregistered (step S301), and the all user management function unit 101 is included in the service integration apparatus DB. “Location phone number” in the user information (FIG. 3) is left blank (step S302). Further, all user management function unit 101 issues a user deletion instruction to user information reception function unit 221A through user information transmission function unit 104 (step S303) (step S304). Upon receiving the user deletion instruction, the user information reception function unit 221A indicates whether or not the user who has received the deletion instruction mainly uses the base A, “the installation apparatus in the base” is included in the user information (FIG. 5). Judgment is made based on “IP address” (step S305). In this case, since it can be determined that the site A is mainly used, it is not deleted from the site installation device 214A.

  Next, when the IP telephone 500 removed from the site A is installed at the site B, it is registered in the in-site SIP server function unit 215B and the off-network SIP server function unit 103 by the operation described in the first embodiment.

  Further, the off-network SIP server function unit 103 extracts the IP address on the best-effort general-purpose NW 400 side of the in-site installation apparatus 200B from the received SIP REGISTER message, and transmits it to all user management function units 101 (step S311). . The all-user management function unit 101 collates with the “location-installed device IP address” in the site registration information (FIG. 2), searches for the site representative telephone number from the matching IP address, and searches it for user information (FIG. 3). Is stored in the “location base phone number” (step S312). Note that the “location base phone number” is the representative number of the base B. Further, the all-user management function unit 101 creates user information (FIG. 5) from the information stored in the service integration device DB 102, and the created user information (FIG. 5) through the best effort general-purpose NW 400 It transmits to the user information reception function part 221B with which the internal installation apparatus 200B is equipped (step S313).

  The user information receiving function unit 221B stores the received user information (FIG. 5) in the in-site installation device DB 214B (step S314). At this time, it should be noted that the “locally installed device IP address” of the user information (FIG. 5) remains the IP address of the locally installed device 200A and is different from the IP address of the locally installed device 200B.

(Incoming call after registration at site B)
With reference to FIG. 12, the incoming sequence after registration with the base B will be described. When a call is made from the quality assurance type SIP-dedicated NW 300 to the IP telephone 500, the destination does not know that the IP telephone 500 has been moved to the base B. ).

  The intra-site SIP server function unit 215A of the base A extracts the destination telephone number or user identifier from the received SIP INVITE message and transmits it to the intra-site user management function unit 213A (step S323). The intra-site SIP server function unit 215A suspends the operation until there is a reply from the intra-site user management function unit 213A or until a preset time has elapsed.

  The site user management function unit 213A that has received the destination telephone number or user identifier transmitted by the site SIP server function unit 215A refers to the user information (FIG. 5) of the site installation apparatus DB 214A. In step S324), since the “inquiry function to the service integration device” of the corresponding destination is ON, the user information in the in-site installation device DB 214A is referred to and the “destination to the service integration device” The SIP INVITE message is transferred to “inquiry telephone number” (step S325).

  Upon receiving the SIP INVITE message, the off-network SIP server function unit 103 extracts an identifier indicating the IP telephone 500 included in the SIP INVITE message, and transmits it to the all-user management function unit 101 (step S326). The all-user management function unit 101 searches for “user identifier” in the user information (FIG. 3) of the service integration device DB 102 that matches the identifier indicating the IP phone 500 included in the received SIP INVITE message. The usage service identifier described in the “user identifier” is extracted (step S327). When the usage service identifier indicates “other site incoming”, the all user management function unit 101 further extracts the “location base phone number” of the user information (FIG. 3) and transfers the SIP INVITE message. An instruction is issued to the off-network SIP server function unit 103 (step S328). Note that in this embodiment, the representative telephone of the base B is stored in the “location telephone number” of the user information (FIG. 3).

  The off-network SIP server function unit 103 transmits a SIP INVITE message to the in-site SIP server function unit 215B via the best-effort general-purpose NW 400 (step S329), and the received in-site SIP server function unit 215B The SIP INVITE message is transferred to the transfer destination via the SIP server distribution function unit 211B (step S330).

  The SIP server distribution function unit 211B that has received the transfer of the SIP INVITE message transmits it to the intra-network SIP server function unit 301 (step S331). In this way, a call to the IP phone 500 at the site A becomes an incoming call to the IP phone 500 at the site B. Subsequent operations are the same as those in the first embodiment. However, it should be noted that the calls are “in-network SIP server” to “in-site installation apparatus A” to “in-site installation apparatus B” to “IP telephone”.

(UnRegister operation at site B and Regster operation at site A)
If the IP telephone 500 installed at the base B is temporarily removed from the base B, the SIP re-Register message does not reach the intra-site SIP server function unit 215B or the off-network SIP server function unit 103. It will be in a registration state (nonpatent literature 2). The off-network SIP server function unit 103 notifies the all user management function unit 101 that the IP telephone 500 has become unregistered, and the all user management function unit 101 includes user information (see FIG. Leave the “Location phone number” in 3) blank. Further, all user management function unit 101 issues a user deletion instruction to user information reception function unit 221B through user information transmission function unit 104.

  The user information reception function unit 221B that has received the deletion instruction of the user indicates whether or not the user who has received the deletion instruction mainly uses the base B “the in-base installation device” included in the user information (FIG. 5). Judge by “IP address”. In this case, since it can be determined that the site A is mainly used, the site A is deleted from the site installation device 214B.

  Next, when the IP telephone 500 removed from the site B is installed at the site A, it is registered in the intra-site SIP server function unit 215A and the off-network SIP server function unit 103 by the operation described in the first embodiment.

  Further, the off-network SIP server function unit 103 extracts the IP address on the best-effort general-purpose NW 400 side of the in-site installation apparatus 200A from the received SIP REGISTER message, and transmits it to the all-user management function unit 101. The all-user management function unit 101 collates with the “location-installed device IP address” in the site registration information (FIG. 2), searches for the site representative telephone number from the matching IP address, and searches it for user information (FIG. 3). To "Location phone number". This “location base phone number” returns to the representative number of the base A.

  Further, the all-user management function unit 101 creates user information (FIG. 5) from the information stored in the service integration device DB 102, and the created user information (FIG. 5) through the best effort general-purpose NW 400 The information is transmitted to the user information reception function unit 221A provided in the internal installation apparatus 200A. The user information reception function unit 221A stores the received user information (FIG. 5) in the in-site installation apparatus DB 214A (information update).

Example 4
In the fourth embodiment, when the operation of REGISTER of the in-site installation apparatus 200 and the IP telephone 500 described in the first embodiment is successful for two bases (base A and base B), the IP installed in the base A An example is shown in which an extension call is made from “IP telephone A”, which is the telephone 500, to “IP telephone B”, which is the IP telephone 500 installed at the base B.

(Outgoing operation from IP phone A to IP phone B)
When IP phone A dials the extension number of IP phone B, IP phone A transmits a SIP INVITE message to IP phone B. This SIP INVITE message is transmitted to the off-network SIP server function unit 103 via the best-effort general-purpose NW 400 by the intra-site SIP server function unit 215A and the SIP server distribution function unit 211A (steps S401 to S403). .

  Upon receiving the SIP INVITE message, the off-network SIP server function unit 103 extracts the destination telephone number or user identifier from the SIP INVITE message and transmits it to the all user management function unit 101 (step S404). The off-network SIP server function unit 103 suspends the operation until there is a reply from all the user management function units 101 or until a preset time has elapsed.

  The all-user management function unit 101 obtains the destination telephone number or the “location base telephone number” of the user that matches the user identifier from the user information (FIG. 3) included in the service integration apparatus DB 102. Extraction is performed (step S405), and a new SIP INVITE message in which “location base telephone number” is specified as the tel-URI and “extension number” is specified as the isub parameter is returned to the off-network SIP server function unit 103 (step S406). Note that tel-URI and isub are described in Non-Patent Document 3, for example.

  The off-network SIP server function unit 103 issues an instruction to transfer the call to the intra-site SIP server function unit 215A via the best-effort general-purpose NW 400 (step S407). The intra-site SIP server function unit 215A transmits the received new SIP INVITE message. This message is transmitted to the “intra-network SIP server function” by the SIP server distribution function unit 211 via the quality assurance type SIP dedicated NW 300. In this way, the transmission of the extension number from IP phone A to IP phone B is received as the SIP INVITE message with isub via the quality assurance SIP-dedicated NW 300 to the site installation device 200 installed at site B. . The subsequent operation follows the incoming call operation described in the first to third embodiments.

  FIG. 14 is a flowchart illustrating an incoming call process in the SIP communication system according to the first to third embodiments.

  When there is an incoming call from the quality assurance type SIP-dedicated NW 300 to the IP telephone 500 under the site installation device 200, the site user management function unit 213 checks whether or not the destination is registered in the site installation device DB 214. (Step S501). If registered, the in-site user management function unit 213 confirms the “inquiry telephone number to the service integration device” of the corresponding destination (step S502).

  If the “inquiry telephone number to the service integration device” is OFF, the process proceeds to step S507, and the incoming call process described in the first embodiment is performed.

  When the “inquiry telephone number to the service integration device” is ON, in the service integration device 100, all user management function units 101 inquire about the operation (“use service identifier”) registered in the service integration device DB 102 (step S503), the service priority is acquired (step S504). Next, the all-user management function unit 101 executes the services in order of priority until the service ends (steps S505 and S506). Note that the service indicates processing such as “forwarding” described in the second embodiment and “other-site incoming call” described in the third embodiment. After all the services are completed, the in-site user management function unit 213 of the in-site installation apparatus 200 performs a predetermined incoming call process (step S507).

  FIG. 15 is a flowchart of the “transfer” service according to the second embodiment. As described in the second embodiment, the all-user management function unit 101 acquires the “forwarding destination telephone number” from the user information (FIG. 3) in the service integration apparatus DB 102 (step S602), and performs intra-site SIP in order of priority. A transfer instruction is issued to the server function unit 215 (step S602), and the intra-site SIP server function unit 215 performs transfer processing (step S603). Steps S601 to S603 are repeated until the transfer destination responds (step S604).

  FIG. 16 is a flowchart of the “other site incoming” service according to the third embodiment. As described in the third embodiment, the all-user management function unit 101 acquires the “location base telephone number” of the user information (FIG. 3) (step S701), and uses the “location base telephone number” to move to Transfer processing to the in-site SIP server function unit 215 is performed (step S702).

  FIG. 17 is a flowchart illustrating a transmission process in the SIP communication system according to the first and fourth embodiments.

  When there is a call from the subordinate IP telephone 500, the in-site user management function unit 213 checks whether or not the caller is registered in the in-site installation apparatus DB 214 (step S801). If registered, the in-site user management function unit 213 checks whether or not the call destination is an extension number (step S802).

  If the call destination is not an extension number, the process proceeds to step S806, and the call process described in the first embodiment is performed.

  When the call destination is an extension number, in the service integration apparatus 100, the all-user management function unit 101 inquires about the operation ("use service identifier") registered in the service integration apparatus DB 102 (step S803), and then transmits the call. The previous location telephone number is acquired (step S804). If the location telephone number of the call destination can be acquired, all user management function unit 101 sets “location telephone number” in tel-URI through off-network SIP server function unit 103 and sets “extension number” in the isub parameter. Is transmitted to the SIP server function unit 215 in the base, and an instruction is given to transfer the call (step S805). The in-site SIP server function unit 215 transmits using the received new SIP INVITE message (step S806).

  As described above, according to each of the above embodiments, when the SIP message (SIP INVITE) is received from the quality assurance type SIP-dedicated NW 300, the on-site installation device 200 transmits the SIP message to the service integration device 100 to perform service integration. The device 100 determines a service to be provided to the user who is the destination of the SIP message, and gives an instruction corresponding to the determined service to the intra-site installation device 200. As a result, communication related to the quality assurance type SIP-dedicated NW in an environment where two types of NWs can be used, the quality assurance type SIP dedicated NW in which the SIP message is defined and the best effort general purpose NW that can freely expand the SIP message. In addition, service expansion by session control becomes easy. Further, without modifying the quality assurance type SIP dedicated NW, the provider of the service integration device can provide a new service related to the telephone. At the same time, after the call is established, the quality assurance type SIP dedicated NW is provided. By using the phone call, it is possible to realize a phone call that ensures the quality of the phone. In addition, it is preferable that media such as voice and video during a call always pass through a quality assurance type SIP dedicated NW.

  Further, according to the second embodiment, the service integration apparatus DB 102 of the service integration apparatus 100 stores the transfer destination telephone number of the user, and the service integration apparatus 100 receives the user who is the destination of the SIP message (SIP INVITE). If the service is a transfer service, the transfer destination telephone number for the user is transmitted to the in-base apparatus 200. As a result, the provider of the service integration apparatus can provide the transfer service by linking the quality assurance type SIP dedicated NW and the best effort type general purpose NW without modifying the quality assurance type SIP dedicated NW. It becomes possible.

  Further, according to the third embodiment, the service integration apparatus DB 102 of the service integration apparatus 100 stores the location base telephone number of the other base (base B) of the user, and the service integration apparatus 100 receives the SIP message (SIP INVITE). When the service to the user who is the destination of the call is the other-site incoming call service, the SIP message is transferred to the on-site installation apparatus 200B of the other site based on the location-based telephone number of the other site for the user. As a result, the provider of the service integration device provides the transfer service at another base by linking the quality assurance SIP dedicated NW and the best effort general purpose NW without modifying the quality assurance SIP dedicated NW. It becomes possible.

  Further, according to the fourth embodiment, the service integration apparatus DB 102 of the service integration apparatus 100 stores the location base telephone number of the first base installation apparatus 200B, and the second base installation apparatus 200A stores the first base installation apparatus 200B. When a SIP message (SIP INVITE) is transmitted to the extension number managed by the in-site installation apparatus 200B, the SIP message is transmitted to the service integration apparatus 100. When the service integration apparatus 100 receives the SIP message, the service integration apparatus 100 receives the SIP message. A new SIP message including the location base telephone number of extension apparatus 200B and the extension number is transmitted to second base installation apparatus 200A. As a result, the provider of the service integration device can provide the extension service by linking the quality assurance SIP dedicated NW and the best effort general purpose NW without modifying the quality assurance SIP dedicated NW. It becomes possible.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, functions included in each member, each means, each step, etc. can be rearranged so as not to be logically contradictory, and a plurality of means, steps, etc. can be combined or divided into one. Is possible.

100 Service Integration Device 101 All User Management Function Unit 102 Service Integration Device DB
103 Overseas SIP server function unit 104 User information transmission function unit 105 Portal function unit 200 In-site installation device 210 SIP communication function unit 211 SIP server distribution function unit 213 In-site user management function unit 214 In-site installation device DB
215 SIP server function unit in site 220 Other communication function unit 221 User information reception function unit 222 Site installation device setting function unit 300 Quality assurance type SIP dedicated NW
301 Intra-network SIP server function unit 400 Best effort general-purpose NW

Claims (8)

On-site installation device connected to quality assurance type SIP dedicated network and best effort general network,
A SIP communication system comprising: a service integration device connected to the in-site installation device via the best-effort general-purpose NW,
The service integration device includes a database that stores services provided to users,
When the SIP message is received from the quality assurance type SIP-dedicated NW, the on-site installation device transmits the SIP message to the service integration device,
The SIP communication apparatus characterized in that the service integration apparatus determines a service to be provided to a user who is a destination of the SIP message, and gives an instruction corresponding to the determined service to the on-site installation apparatus. system. The database of the service integration device stores the transfer destination telephone number of the user,
The service integration device transmits a transfer destination telephone number for the user to the on-site installation device when a service to a user who is a destination of the SIP message is a transfer service. Item 4. The SIP communication system according to Item 1. The database of the service integration device stores a location base telephone number of another base of the user,
When the service to the user who is the destination of the SIP message is an other-site incoming service, the service integration device sends the SIP message to the other-site based on the location-based telephone number of the other site for the user. The SIP communication system according to claim 1, wherein the SIP communication system is transferred to an in-site installation device. The database of the service integration device stores a location base telephone number of the first base installation device,
When the second site installation device transmits a SIP message to the extension number managed by the first site installation device, the second site installation device transmits the SIP message to the service integration device,
When the service integration device receives the SIP message, the service integration device transmits a new SIP message including the location base telephone number of the first site installation device and the extension number to the second site installation device. The SIP communication system according to any one of claims 1 to 3, wherein On-site installation device connected to quality assurance type SIP dedicated network and best effort general network,
A SIP communication method in a SIP communication system comprising: a service integration device connected to the on-site installation device via the best-effort general-purpose NW,
Storing the service provided to the user by the service integration device;
When the SIP installation message is received from the quality assurance type SIP-dedicated NW, the on-site installation device transmits the SIP message to the service integration device;
The service integration device determining a service to be provided to a user who is a destination of the SIP message, and performing an instruction corresponding to the determined service to the in-site installation device. SIP communication method. The service integration device storing the forwarding telephone number of the user;
The service integration device, when the service to the user that is the destination of the SIP message is a transfer service, the step of transmitting the transfer destination telephone number for the user to the in-base device. The SIP communication method according to claim 5, wherein: The service integration device stores a location base telephone number of the other base of the user;
In the case where the service to the user who is the destination of the SIP message is an other-site incoming call service, the service integration device sends the SIP message to the other-site based on the location-based telephone number of the other site for the user. The SIP communication method according to claim 5, further comprising a step of transferring to the in-site installation apparatus. The service integration device stores a location base telephone number of the first location installation device,
When the second site installation device transmits a SIP message to the extension number managed by the first site installation device, the step of transmitting the SIP message to the service integration device;
When the service integration device receives the SIP message, the service integration device transmits a new SIP message including the location base telephone number of the first site installation device and the extension number to the second site installation device. The SIP communication method according to claim 5, further comprising: a step.

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