KR101077469B1 - Method of providing extension arrival service to internet protocol based private branch exchange subscriber - Google Patents

Abstract

Disclosed is a method of providing an extension service for an IP-PBX (IP-Private Branch eXchange) subscriber. The method for providing an extension call service includes: (A) a first call terminal connected to a CS (Circuit Switched) network from an IP server in an IP Multimedia Subsystem (IMC) network in a Voice Call Continuity (VCC) application server (ASC); Receiving extension call information to the connected second terminal and requesting an extension number corresponding to the extension number of the second terminal to the VCC gateway of the IP-based local area network based on the extension call information; (B) storing, at the VCC AS, the number of the first terminal and the external number received from the VCC gateway, allocating a routing number for the second terminal and transmitting the number to the CS network; (C) performing, at the VCC AS, anchoring an outgoing call based on a response message received from the CS network based on the transmitted routing number; And (D) receiving the outgoing call information generated on the basis of the anchoring result in the VCC AS in the IP-based local area network, and conducting a call to the second terminal based on the outgoing call information. It may include a step.

Description

How to provide extension incoming service for IP-based branch exchange subscribers {METHOD OF PROVIDING EXTENSION ARRIVAL SERVICE TO INTERNET PROTOCOL BASED PRIVATE BRANCH EXCHANGE SUBSCRIBER}

The present invention relates to Voice Call Continuity (VCC), and more specifically, to a subscriber of an IP-based premises exchange using a Dual Band Dual Mode (DBDM) terminal, a Voice Call Continuity Application in an Internet Protocol Multimedia Subsystem (IMS) network. The present invention relates to an extension service providing method for subscribers of an IP-based branch exchange that provides extension service using a server).

VCC is a kind of application, and refers to a technology for switching voice calls between a CS network and an IMS network. Such a VCC refers to a service for allowing a terminal using a voice service to continuously use a voice service in use even though a domain transfer is performed between the CS network and the IMS network. That is, it guarantees continuity of calls during handover between voice service using CS network and Voice over IP (VoIP) service using IMS network.

Here, the VCC AS located in the IMS network provides a continuous voice service between the CS network and the IMS network through anchoring of all voice calls of the VCC subscribers.

However, the VCC AS according to the prior art only anchors the radio number between the CS network and the IMS network, and when the VCC subscriber originates to an extension number in the IP-PBX network or the CS network, normal connection to the call is impossible. -There is a need for a method that can call / receive calls from outside the PBX network.

Accordingly, a technical problem to be achieved by the present invention is to provide an extension service method for IP-PBX subscribers using a DBDM terminal by interworking a VCC gateway in an IP-PBX (IP-Private Branch eXchange) network and a VCC AS in an IMS network. To provide.

In order to solve the above technical problem, a method of providing a VCC service interworking with an IP-based premises exchange according to an embodiment of the present invention is (A) in a Voice Call Continuity (VCC) application of an IMS (IP Multimedia Subsystem) network. Receiving, from the first terminal connected to the CS (Circuit Switched) network, the extension originating call information to the second terminal connected to the IP-based Private Branch eXchange (IP-PBX) network; Requesting an external line number corresponding to the extension number of the second terminal to the VCC gateway of the IP-based local area network based on the information; (B) storing, at the VCC AS, the number of the first terminal and the external number received from the VCC gateway, allocating a routing number for the second terminal and transmitting the number to the CS network; (C) performing, at the VCC AS, anchoring an outgoing call based on a response message received from the CS network based on the transmitted routing number; And (D) receiving the outgoing call information generated on the basis of the anchoring result in the VCC AS in the IP-based local area network, and proceeding with the call to the second terminal based on the outgoing call information. It may include the steps to

According to another aspect of the present invention, there is provided a method of providing a VCC service interworking with an IP-based premises exchange (A) in a Voice Call Continuity (VCC) application server of an IP Multimedia Subsystem (IMS) network. And receiving the extension call information from the first terminal registered in the CS (Circuit Switched) network to the second terminal connected to the CS network, and corresponding to the extension number of the second terminal based on the extension call information. Requesting an external line number to a VCC gateway of an IP-based Private Branch eXchange (IP-PBX) network; (B) at the VCC gateway, transmitting an external line number corresponding to the extension number of the second terminal to the VCC AS in response to a request of the VCC AS; (C) in the VCC AS, stores the number of the first terminal and the external line number received from the VCC gateway, allocates a routing number for the second terminal and transmits the routing number to the CS network, and transmits the transmitted routing number. Selecting a domain for the extension incoming call based on the response message received from the CS network in response to, and performing anchoring on the extension incoming call based on the response message; And (D) receiving the outgoing call information generated on the basis of the anchoring result in the VCC AS in the IP-based local area network, and conducting a call to the second terminal based on the outgoing call information. It may include a step.

As described above, the method for providing an extension call service for an IP-PBX subscriber according to the present invention is an extension of the IP-PBX subscribers from outside the IP-PBX network by interworking a VCC AS in the IMS network and a VCC gateway in the IP-PBX network. There is an effect that can provide the incoming service.

1 is a diagram illustrating a connection relationship with other networks of an IP-PBX network including a VCC gateway according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating in more detail a connection relationship between an IP-PBX network including the VCC gateway shown in FIG. 1 and other networks.
3 is a flowchart illustrating a process in which a call is transmitted from a first terminal of a CS network to a second terminal of an IP-PBX network by the VCC gateway illustrated in FIG. 2.
4 is a flowchart illustrating a process in which a call is received from a first terminal to a second terminal of a CS network by the VCC gateway illustrated in FIG. 2.

Specific structural to functional descriptions of embodiments according to the inventive concept disclosed in the specification or the application are only illustrated for the purpose of describing embodiments according to the inventive concept, and according to the inventive concept. The examples may be embodied in various forms and should not be construed as limited to the embodiments set forth herein or in the application.

When a component is said to be "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that another component may exist in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

 For example, when one component 'transmits or outputs' data or a signal to another component, the component may 'transmit or output' the data or signal directly to the other component, and at least one This means that the data or signal may be transmitted or output to the other component through another component of.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

FIG. 1 shows an IP-based private branch exchange (hereinafter referred to as 'IP-PBX') in an IP-based private branch eXchange network (hereinafter referred to as 'IP-PBX network'). It is a diagram showing the connection relationship between the VCC gateway 110 and other networks in accordance with an embodiment of the present invention for providing an extension service in conjunction with the box 120.

Referring to FIG. 1, the VCC gateway 110 is an IP phone 130 in the IP-PBX network 100, a dual band dual mode phone (hereinafter referred to as a 'DBDM terminal'). Box, 140) and the like, and are connected between the IP-PBX 120 and the IP-PBX 120, and may be connected to the IP-Centrex network 200, and the IMS network (Internet protocol Multimedia Subsystem network, 400). A VCC application server may also be connected to the VCC application server. For reference, the IP-Centrex network 200 shown in FIG. 1 is a kind of Internet telephone network, and the IP-Centrex network 200 is wired through a soft switch (hereinafter referred to as SSW) 210. It may also be connected to a telephone network (PSTN network) 300.

The VCC gateway 110 may serve as a node that helps the VCC AS 410 anchor the call of the subscriber in the IP-PBX network 100.

In this case, the VCC gateway 110 should transmit the caller / outgoing information of the subscriber to the VCC AS 410, for this purpose, the VCC gateway 110 is an extension number corresponding to the extension number and the extension number of the subscriber. It stores and, in conjunction with the VCC AS (410) provides the external number mapping information for the extension number.

Then, the VCC AS 410 performs a seamless handover function between heterogeneous networks (for example, a wireless LAN network and a mobile communication network), and is connected to the VCC gateway 110 according to an embodiment of the present invention. In a limited coverage situation such as the IP-PBX network 100, it is possible to provide subscribers with continuous voice service.

In this case, the subscriber's terminal may be connected to the IP-PBX network 100 according to a predetermined standard (for example, WiFi standard), and may be connected to another communication network (for example, mobile communication network) according to a different standard from the predetermined standard. DBDM terminal that can be connected. In the present specification, the terminal of the subscriber will be described using a DBDM terminal for a WiFi network and a mobile communication network as an example, but the scope of the present invention is not limited thereto.

FIG. 2 is a diagram illustrating in detail the connection relationship between the IP-PBX network 100 including the VCC gateway 110 shown in FIG. 1 and other networks. Referring to FIG. 2, the IP-PBX network 100 is a mobile switched network in addition to the IP-Centrex network 200 and the IMS network 400 shown in FIG. 1 (hereinafter referred to as a 'CS network'). )

That is, the VCC gateway 110 according to the embodiment of the present invention shown in FIG. 2 is a node that enables a VCC service (ie, handover) between the IP-PBX network 100 and the CS network 500. Play a role.

In addition, when the IP-PBX 120 subscriber tries to call an extension number in the CS network 500, the VCC AS 410 calls an external number mapped by the VCC gateway 110 to the extension number. Route

The structures and functions of the IP-Centrex network 200, the IMS network 400, and the CS network 500 are well known to those skilled in the art to which the present invention pertains. Description is omitted.

FIG. 3 shows the call from the first terminal (VCC UE # 1) of the call price CS network 500 to the second terminal (VCC UE # 2) of the IP-PBX network 100 by the VCC gateway 110 shown in FIG. It is a flow chart showing the process sent to. Hereinafter, the process will be described in detail with reference to FIGS. 2 and 3.

A first terminal (VCC UE # 1) connected to the CS network 500 has a setup message corresponding to a call to the second terminal (VCC UE # 2) connected to the IP-PBX network 100 (Setup UE). # 2) is transmitted to the mobile switching center (MSC) 510 of the CS network 500 (S30).

The VCC AS 410 is an extension originating call information (IDP (Orig)) transmitted by the MSC 510 via a Call Cession Control Function (CSCF) based on the caller intelligence network triggering information by the MSC 510. ) Is received (S31). In this case, the extension call information includes the number UE # 1 of the first terminal VCC UE # 1 and the extension number of the second terminal VCC UE # 2.

Then, the number UE # 1 of the first terminal VCC UE # 1 is the number of the IP-PBX 120 subscriber, and the called number from the first terminal VCC UE # 1 is the extension number. In this case, the VCC AS 410 sends an external number corresponding to the extension number of the second terminal (VCC UE # 2) based on the extension origination call information to the VCC gateway 110 of the IP-PBX network 100. Request (S32).

Then, the VCC gateway 110 transmits the external line number corresponding to the extension number of the second terminal (VCC UE # 2) to the VCC AS 410 in response to the request of the VCC AS 410 (S33). ). The VCC AS 410 receives the external line number corresponding to the extension number of the second terminal (VCC UE # 2), so that the number (UE # 1) information element of the first terminal (VCC UE # 1) that is the caller. And an extension number information element corresponding to the extension number of the second terminal (VCC UE # 2) that is the called party.

At this time, the VCC AS 410 is based on the extension call information by the SIP (Session Initiation Protocol) to the VCC gateway 110 to the external number corresponding to the extension number of the second terminal (VCC UE # 2) Request from the VCC gateway 110 and a success response message including the extension number information corresponding to the extension number of the second terminal (VCC UE # 2).

In addition, the VCC AS 410 allocates an IMS Routing Number (hereinafter referred to as 'IMRN') so that the second terminal (VCC UE # 2) can be used in the IMS network 400. In this case, the VCC AS 410 allocates the routing number IMRN to a number that the subscriber can receive through a network receiving IMS, and assigns the assigned routing number IMRN to the CS network 500. ).

The MSC 510 receives the routing number IMRN transmitted by the VCC AS 410 via the CSCF 420 (S34), and generates the routing number IMRN as a called number. The response message (IAM (UE # 1, IMRN)) is transmitted to the SSW 210 of the IP-Centrex network 200 (S35).

The VCC AS 410 receives the number UE # 1 and the routing number IMRN of the first terminal VCC UE # 1 generated from the SSW 210 based on the response message (S36). ), An extension origination from the first terminal (VCC UE # 1) of the CS network 500 based on the number UE # 1 of the first terminal (VCC UE # 1) and the routing number IMRN. Anching a call is performed (S37), and includes the number UE # 1 of the first terminal VCC UE # 1 and the external number of the second terminal VCC UE # 2 based on the anchoring result. External call information (INVITE (UE # 1, UE # 2 / external number)) is transmitted to the SSW 210 (S38).

Then, the IP-PBX 120 determines a number UE # 1 of the first terminal VCC UE # 1 generated from the SSW 210 and the second terminal VCC based on the outgoing call information. The external number of UE # 2 is received (S39) and transmitted to the VCC gateway 110.

The VCC gateway 110 based on the received number UE # 1 of the first terminal VCC UE # 1 and the outside line number of the second terminal VCC UE # 2. Proceed to call for the outside line number of 2).

4 is a flowchart illustrating a process in which a call is received from the first terminal VCC UE # 1 to the second terminal VCC UE # 2 of the CS network 500 by the VCC gateway 110 illustrated in FIG. 2. Hereinafter, the process will be described in detail with reference to FIGS. 2 to 4.

Before describing FIG. 4, any one of the IP-PBX network 100, the IMS network 400, or the CS network 500 is controlled by the first terminal (VCC UE # 1) of the subscriber of the IP-PBX 120. Even if a call is originated from one, the first terminal (VCC UE # 1) shows the process of the call to the second terminal (VCC UE # 2) in the state registered in the CS network 500.

Referring back to FIG. 4, the first terminal (VCC UE # 1) registered in the CS network 500 corresponds to a call to the second terminal (VCC UE # 2) connected to the CS network 500. The setup message (Setup UE # 2) is transmitted to a mobile switching center (MSC) 510 of the CS network 500 (S40).

VCC AS (410) is the extension call information (IDP (Term)) transmitted by the MSC (510) via the Call Cession Control Function (CSCF) based on the caller intelligent network triggering information by the MSC (510) ) Is received (S41). In this case, the extension call information includes the number UE # 1 of the first terminal VCC UE # 1 and the number UE # 2 of the second terminal VCC UE # 2.

Then, the number UE # 1 of the first terminal VCC UE # 1 is the number of the IP-PBX 120 subscriber, and the called number from the first terminal VCC UE # 1 is the extension number. In this case, the VCC AS 410 sends an external number corresponding to the extension number of the second terminal (VCC UE # 2) based on the extension call information to the VCC gateway of the IP-PBX network 100 ( 110 to request (S42).

Then, in response to the request of the VCC AS 410, the VCC gateway 110 transmits an external line number corresponding to the extension number of the second terminal (VCC UE # 2) to the VCC AS 410 (S43). ). The VCC AS 410 receives the external line number corresponding to the extension number of the second terminal (VCC UE # 2), so that the number (UE # 1) information element of the first terminal (VCC UE # 1) that is the caller. And an extension number information element corresponding to the extension number of the second terminal (VCC UE # 2) that is the called party.

In this case, the VCC AS 410 receives the external number corresponding to the extension number of the second terminal (VCC UE # 2) based on the extension call information according to the Session Initiation Protocol (SIP). Request from the VCC gateway 110 and a success response message including the extension number information corresponding to the extension number of the second terminal (VCC UE # 2).

In addition, the VCC AS 410 allocates an IMS Routing Number (hereinafter referred to as 'IMRN') so that the second terminal (VCC UE # 2) can be used in the IMS network 400. In this case, the VCC AS 410 allocates the routing number IMRN to a number that the subscriber can receive through a network receiving IMS, and assigns the assigned routing number IMRN to the CS network 500. ).

The MSC 510 receives the routing number IMRN transmitted by the VCC AS 410 via the CSCF 420 (S44), and generates the routing number IMRN as a called number. The response message (IAM (UE # 1, IMRN)) is transmitted to the SSW 210 of the IP-Centrex network 200 (S45).

The VCC AS 410 receives the number UE # 1 and the routing number IMRN of the first terminal VCC UE # 1 generated from the SSW 210 based on the response message (S46). ), The VCC AS 410 performs a domain selection process for an extension call based on the number UE # 1 of the received first terminal VCC UE # 1 and the routing number IMRN. In operation S47, anchoring is performed for the extension incoming call.

At this time, the domain selection process is optional to the IMS network 400 or the CS network 500 for a call sent by the subscriber according to a priority set in advance by an IP-based branch exchange subscriber or operator according to the present invention. The domain selection process may be performed to receive a call, and for example, the subscriber may set the call to be made to the IMS network 400 first, for reasons such as a rate reduction.

The VCC AS 410 transmits an external line including a number UE # 1 of the first terminal VCC UE # 1 and an outside number of the second terminal VCC UE # 2 based on the anchoring result. Call information (INVITE (UE # 1, UE # 2 / external number)) is transmitted to the SSW 210.

The IP-PBX 120 is a number UE # 1 of the first terminal VCC UE # 1 and a second terminal VCC UE # generated from the SSW 210 based on the outgoing call information. Receives an outside line number of 2) and transmits it to the VCC gateway 110.

The VCC gateway 110 based on the received number UE # 1 of the first terminal VCC UE # 1 and the outside line number of the second terminal VCC UE # 2. Proceed to call for the outside line number of 2).

On the other hand, the components of the VCC gateway 110 for performing the extension call service providing method according to an embodiment of the present invention, a part, or a combination thereof may be software, hardware, or software for carrying out the technical spirit of the present invention. It can be implemented by a combination of and hardware.

The method for providing an extension call service for an IP-based branch exchange subscriber according to an embodiment of the present invention may also be implemented as computer readable code on a computer readable recording medium. An extension service providing method for an IP-based branch exchange subscriber according to an embodiment of the present invention executes a computer program for executing the extension call service providing method for the IP-based branch exchange subscriber stored in a computer-readable recording medium. Can be implemented.

The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. For example, computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.

The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. In addition, functional programs, codes, and code segments for implementing an extension call service providing method for an IP-based branch exchange subscriber according to an embodiment of the present invention are easily inferred by programmers in the art to which the present invention belongs. Can be.

Although the invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

100: IP-PBX network 110: VCC gateway
120: IP-PBX 200: IP-Centrex Network
210: SSW 300: wired telephone network
400: IMS network 410: VCC AS
420: CSCF 500: CS network
510: MSC

Claims (13)

(A) IP-PBX (IP-PBX: IP-Private Branch) from a first terminal connected to a CS (Circuit Switched) network in a Voice Call Continuity (VCC) Application Server (ASC) of an IMS (IP Multimedia Subsystem) network. eXchange) and receives the extension call information to the second terminal connected to the network, and transmits the extension number corresponding to the extension number of the second terminal to the VCC gateway of the IP-based local area network based on the extension call information. Requesting;
(B) storing, at the VCC AS, the number of the first terminal and the external number received from the VCC gateway, allocating a routing number for the second terminal and transmitting the number to the CS network;
(C) performing, at the VCC AS, anchoring an extension originating call based on a response message received from the CS network based on the transmitted routing number; And
(D) receiving the outgoing call information generated on the basis of the anchoring result in the VCC AS in the IP-based local area network, and performing a call to the second terminal based on the outgoing call information. An extension call service providing method for an IP-based premises exchange subscriber comprising a. The method of claim 1, wherein the second terminal
A method for providing an extension call service to an subscriber of an IP-based branch exchange network, characterized in that the terminal is connected to the IP-based branch exchange network according to a wireless LAN standard. The method of claim 1, wherein the VCC AS
Request an external line number corresponding to the extension number of the second terminal to the VCC gateway based on the extension origination call information according to SIP (Session Initiation Protocol);
The VCC gateway
And transmitting a response message including the extension number information corresponding to the extension number of the second terminal to the VCC AS according to the SIP. The method of claim 1, wherein step (C)
(C1) at the VCC AS, receiving the response message transmitted from the CS network through the soft switch connected between the IMS network and the IP-based branch exchange network using the routing number as a called number;
(C2) in the VCC AS, receives the number and the routing number of the first terminal generated in the soft switch based on the response message, and originates the extension based on the number and the routing number of the first terminal. Performing anchoring on the call; And
(C3) in the VCC AS, transmitting the anchoring result including the number of the first terminal and the number of the external terminal of the second terminal to the IP-based local area network using the external number of the second terminal as a called number. And providing an extension call service for an IP-based branch exchange subscriber. The method of claim 4, wherein step (D)
(D1) In the IP-based premises exchange of the IP-based premises switch network, the number and the first number of the first terminal generated in the soft switch connected between the IMS network and the IP-based premises switch network based on the anchoring result Receiving the external line number of the second terminal and transmitting the received external number to the VCC gateway; And
(D2) in the VCC gateway, making a call to the second terminal based on the number of the first terminal and the outside number of the second terminal received from the IP-based premises exchange. How to provide extension incoming service to exchange subscribers. A computer-readable recording medium storing code for executing a method for providing an extension call service for an IP-based branch exchange subscriber according to claim 1. (A) Incoming call from a first terminal registered in a CS (Circuit Switched) network to a second terminal connected to the CS network in a Voice Call Continuity (VCC) Application Server (ASC) of an IMS (IP Multimedia Subsystem) network; Receiving call information and requesting an external number corresponding to the extension number of the second terminal to a VCC gateway of an IP-PBX (IP-Private Branch eXchange) network based on the extension call information; ;
(B) at the VCC gateway, transmitting an external line number corresponding to the extension number of the second terminal to the VCC AS in response to a request of the VCC AS;
(C) in the VCC AS, stores the number of the first terminal and the external line number received from the VCC gateway, allocates a routing number for the second terminal and transmits the routing number to the CS network, and transmits the transmitted routing number. Selecting a domain for the extension incoming call based on the response message received from the CS network in response to, and performing anchoring on the extension incoming call based on the response message; And
(D) receiving the outgoing call information generated on the basis of the anchoring result in the VCC AS in the IP-based local area network, and performing a call to the second terminal based on the outgoing call information. An extension call service providing method for an IP-based premises exchange subscriber comprising a. The method of claim 7, wherein the second terminal
A method for providing an extension call service to an subscriber of an IP-based branch exchange network, characterized in that the terminal is connected to the IP-based branch exchange network according to a wireless LAN standard. The method of claim 7, wherein the VCC AS is
Request an external line number corresponding to the extension number of the second terminal to the VCC gateway based on the extension call information according to the Session Initiation Protocol (SIP),
The VCC gateway
And transmitting a response message including the extension number information corresponding to the extension number of the second terminal to the VCC AS according to the SIP. The method of claim 7, wherein step (C)
(C1) at the VCC AS, receiving the response message transmitted from the CS network through the soft switch connected between the IMS network and the IP-based branch exchange network using the routing number as a called number;
(C2) in the VCC AS, receives the number of the first terminal and the routing number generated in the soft switch based on the response message, and receives the extension based on the number of the first terminal and the routing number. Selecting a domain for a call and performing anchoring for the extension incoming call based on the response message; And
(C3) in the VCC AS, transmitting the anchoring result including the number of the first terminal and the number of the external terminal of the second terminal to the IP-based local area network using the external number of the second terminal as a called number. And providing an extension call service for an IP-based branch exchange subscriber. The method of claim 10, wherein step (D)
(D1) In the IP-based premises exchange of the IP-based premises switch network, the number and the first number of the first terminal generated in the soft switch connected between the IMS network and the IP-based premises switch network based on the anchoring result Receiving the external line number of the second terminal and transmitting the received external number to the VCC gateway; And
(D2) in the VCC gateway, making a call to the second terminal based on the number of the first terminal and the outside number of the second terminal received from the IP-based premises exchange. How to provide extension incoming service to exchange subscribers. The method of claim 7, wherein in the step (C), the step of selecting a domain for the extension call is
A method for providing an extension call service to an IP-based premises exchange subscriber, characterized in that the incoming call is selectively received by the IMS network or the CS network according to the setting of the IP-based premises exchange subscriber or operator. A computer-readable recording medium storing code for executing a method of providing an extension call service for an IP-based branch exchange subscriber according to claim 7.

Images