KR101638731B1 - Apparatus and Method for processing VoLTE Originating Call - Google Patents

Abstract

The present invention relates to an apparatus and method for processing a VoLTE originating call, which change reception routing for a VoLTE originating call for each model of transmitting terminals when a caller of a VoLTE call is a subscriber to a first LTE network and a receiver is a subscriber to a second LTE network, thereby enabling a rate of success to increase. A method for processing a VoLTE originating call, which is included in an S-CSCF of an IMS network in a first LTE network, according to an aspect of the present invention may comprise: step (a) adapted to manage a list of information of a model of a specific terminal; step (b) of receiving a VoLTE originating call transmitted by a subscriber to a first LTE network; step (c) of determining whether information of a model of a terminal transmitting the VoLTE originating call is information of a model included in the list when a receiver of the received VoLTE originating call is a subscriber to a second LTE network; step (d) of setting a routing path of the VoLTE originating call to a first path using an IBCF or a second path using a BGCF depending on a result of the determination at the step (c); and step (e) adapted to process the VoLTE originating call via the first path or the second path set at the step (d).

Description

[0001] Apparatus and Method for Processing VoLTE Originating Call [

[0001] The present invention relates to a technology for processing a VoLTE originated call, and more particularly, to a technique for processing a VoLTE originated call when a caller of a VoLTE call is a subscriber of a first LTE network and a called subscriber is a subscriber of a second LTE network, And more particularly, to a VoLTE outgoing call processing apparatus and method for increasing the call success rate by varying the incoming routing for VoLTE originated calls.

Currently, the 3GPP (3 ^rd Generation Partnership Project) is being proposed as a new standard for multimedia production, transmission and playback through high-speed wireless networks. The Internet Protocol Multimedia Subsystem (IMS) proposed in the 3GPP standard is a system for providing IP-based multimedia services.

The IMS service refers to providing various types of packet services based on a lower IP transmission protocol to a mobile communication subscriber at the same time. The IMS service can simultaneously provide various types of packet-based services based on the IP transmission protocol to the mobile communication subscriber. The IMS service enables a mobile communication subscriber to receive not only real-time services such as voice and video but also file transmission, Real-time services such as short messages, etc., or to use new services using such services.

In order for the mobile communication subscriber to receive the IMS service, a registration process must be performed. In this registration process, a call control function for controlling the call and the service of the mobile communication terminal of the mobile communication subscriber must be allocated.

In order to provide such an IMS service, an important function element of a subsystem in a core network of IMS is a call session control function (CSCF) and a home subscriber server (HSS).

The CSCF is a device that handles registration and multimedia call processing functions using SIP (Session Initiation Protocol), and includes a Proxy-Call Session Control Function (P-CSCF), a Query / CSCF (Interrogate-Call Session Control Function), and Serving-Call Session Control Function (S-CSCF).

The P-CSCF is the point where the mobile communication subscriber first accesses the network. The P-CSCF relays the SIP registration request message of the mobile communication subscriber to the I-CSCF with reference to the home domain of the subscriber, and maintains the security relationship with the mobile communication subscriber.

The I-CSCF obtains the address of the S-CSCF performing the SIP registration of the mobile communication subscriber from the HSS and allocates the S-CSCF to be responsible for the actual registration of the mobile communication subscriber.

The S-CSCF downloads the subscription information of the mobile communication subscriber from the HSS and stores it, and provides the corresponding service to the mobile communication subscriber.

The HSS performs a role of a master database of a mobile communication subscriber and is a kind of database integrated with functions of a home location register (HLR) and a function for mobility management and authentication of an IP multimedia subscriber.

For IMS call processing, the S-CSCF must register with the mobile communication subscriber's IP and ID, e.g., a telephone number, login ID, and the like. At this time, the I-CSCF queries the HSS to determine which S-CSCF should be registered. The overall call process including this process will be briefly described below.

First, when the P-CSCF receiving the request from the mobile communication subscriber requests the registration to the I-CSCF, the I-CSCF makes an S-CSCF search request to the HSS to find the S-CSCF to be registered.

The HSS determines whether there is an existing S-CSCF registered. If there is an existing S-CSCF registered, the HSS responds the corresponding S-CSCF information to the I-CSCF for re-registration. Otherwise, the I- -CSCF will tell you to judge on your own.

If the HSS informs the S-CSCF information, the I-CSCF sends a registration request message to the corresponding S-CSCF, and the S-CSCF, which has received the registration request message, sends a status message indicating that the mobile communication subscriber is registered To the HSS.

On the other hand, if the HSS transmits a registration status response message to the corresponding S-CSCF, it is possible to control the IMS call processing service for the corresponding S-CSCF.

Meanwhile, there is a CSCF for controlling a call to control a VoLTE (Voice Over LTE) service, which is an IMS-based voice call, in an LTE (Long Term Evolution) network. When a VoLTE user of the first LTE network transmits a call The S-CSCF of the IMS network of the first LTE network (hereinafter referred to as the first IMS network) as the originating network transmits the IMS network of the second LTE network (hereinafter, referred to as the second IMS network) The IBCF of the first IMS network routes the incoming call to the IBCF of the second IMS network using the incoming domain, and the IBCF of the first IMS network routes the incoming call to the IBCF of the second IMS network , Whereby a call is established between the VoLTE user and the called party of the originating network. Such a method is generally called a VoLTE direct linking method between providers.

However, as a result of simulated tests of the VoLTE origination call processing according to the VoLTE direct interworking method between the carriers, the originating terminal often fails to normally process the response message received from the other IMS network, There is a problem that call setup between the terminal and the called terminal is impossible and normal call service can not be provided.

Open Patent Publication No. 10-2010-0012256 (Published Feb. 2, 2010)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for solving the above- And to provide a VoLTE outgoing call processing apparatus and method that can increase the call success rate by varying the routing.

In order to achieve the above object, a VoLTE outgoing call processing apparatus according to an aspect of the present invention is a VoLTE outgoing call processing apparatus included in an S-CSCF of an IMS network of a first LTE network, A management unit for managing the management server; A receiver for receiving a VoLTE outgoing call originated from a subscriber of the first LTE network; A confirmation unit for confirming whether the model information of the calling terminal of the VoLTE originated call is model information included in the list of the management unit when the received VoLTE origination call is a subscriber of the second LTE network as a receiver; A setting unit for setting a routing path of the VoLTE origination call to a first path through an IBCF or a second path through a BGCF according to an identification result of the confirmation unit; And a processing unit for processing the VoLTE originated call through the first path or the second path set through the setting unit.

The confirmation unit can confirm the model information of the calling terminal based on the information of the terminal recorded in the User-Agent header of the INVITE message corresponding to the VoLTE originated call.

Wherein the setting unit sets the routing path of the VoLTE origination call to the first path when the model information of the calling terminal of the VoLTE originated call is model information not included in the list of the management unit, And may set the routing path of the VoLTE origination call as the second path when the type information is included in the list of the management unit.

According to another aspect of the present invention, there is provided a VoLTE outgoing call processing method for processing a VoLTE outgoing call included in an S-CSCF of an IMS network of a first LTE network, the method comprising: (a) Managing a list for the user; (b) receiving a VoLTE outgoing call originated from a subscriber of the first LTE network; (c) if the received VoLTE origination call is a subscriber of the second LTE network, checking whether the model information of the calling terminal of the VoLTE originated call is the model information included in the list; (d) setting a routing path of the VoLTE origination call to a first path through an IBCF or a second path through a BGCF according to a result of the checking in step (c); And (e) processing the VoLTE originated call through the first path or the second path set in step (d).

The step (c) may confirm the model information of the calling terminal based on the information of the terminal recorded in the User-Agent header of the INVITE message corresponding to the VoLTE originated call.

Wherein the step (d) sets the routing path of the VoLTE origination call to the first path when the model information of the calling terminal of the VoLTE origination call is model information not included in the list, The routing path of the VoLTE origination call can be set to the second path.

According to another aspect of the present invention, there is provided a computer readable recording medium storing a program for causing a computer to execute the VoLTE origination call processing method.

According to another aspect of the present invention, there is provided an application stored in a medium for executing the VoLTE outgoing call processing method in combination with hardware.

According to another aspect of the present invention, there is provided a computer program stored in a medium for executing the VoLTE origination call processing method in a computer.

As described above, according to various aspects of the present invention, when a caller of a VoLTE call is a subscriber of a first LTE network and a called subscriber is a subscriber of a second LTE network that is differentiated from a first LTE network, VoLTE It is possible to increase the call success rate by changing the incoming routing for the outgoing call.

1 is a configuration diagram of a system for VoLTE originated call processing according to an embodiment of the present invention;
2 is a configuration diagram of a VoLTE outgoing call processing apparatus according to an embodiment of the present invention,
3 is a flowchart of a VoLTE origination call processing method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown in different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a block diagram of a system for VoLTE originated call processing according to an embodiment of the present invention. As shown in the figure, a UE 100, a first IMS network 200, a second IMS network 300, And a legacy network (Legacy) 400.

The user equipment (UE) 100 is a mobile terminal of a user, for example, a smart phone, a notepad, a tablet PC, And may include various mobile terminals that are subscriptionable to at least the first IMS network 200 to receive the VoLTE service.

CSCF 220, IBCF 230, and Breakout Gateway Control Function (BGCF) 230. The first IMS network 200 represents an IMS network in the first LTE network. For example, the P-CSCF 210, the S- ) ≪ / RTI >

The second IMS network 300 represents an IMS network belonging to the second LTE network of the first LTE network and another provider (or communication slave). For example, the IBCF 230 of the first IMS network 200, And an IBCF 310 for interworking with the IBCF 310.

The legacy network 400 represents an existing communication network before the first and second IMS networks 200 and 300 and may include a Media Gateway Control Function (MGCF) 410 for interworking with, for example, the BGCF 240 .

In this embodiment, when the caller of the VoLTE call is a subscriber of the first IMS network 220 of the first LTE network and the called party is a subscriber of the second IMS network 300 of the second LTE network, the S- It is possible to set the incoming route for the VoLTE originated call to the first route through the IMCF 230 or the second route through the BGCF 240 for each model (model) of the VoLTE.

2, a VoLTE outgoing call processing apparatus according to an embodiment of the present invention may be included in the S-CSCF 220 of FIG. 1 and includes a management unit 221, a reception unit 223, An acknowledgment unit 225, a setting unit 227, and a processing unit 229. [

The management unit 221 manages a list of the model information of a specific terminal and manages a list of model information of a terminal that is prohibited to directly interlock (i.e., interworker VoLTE direct interworking) between the first IMS network 200 and the second IMS network 300 For example, a VoLTE direct interworking method using a first IMS network 200 as a source network and a second IMS network 300 as a destination network. If the calling terminal does not normally process the response message received from the second IMS network 300 as a result of the simulation test, the model (model) information of the calling terminal is registered And manage them by a list.

The receiving unit 223 is for receiving an IMS network of the first LTE network, that is, a VoLTE outgoing call originated from the subscriber UE 100 of the first IMS network 200. For example, Via the P-CSCF 210, an invite message corresponding to a VoLTE outgoing call.

When the VoLTE originated call received by the receiving unit 223 is an IMS network of the second LTE network, that is, a subscriber of the second IMS network 300, which is distinguished from the first LTE network, For example, the invite message corresponding to the VoLTE outgoing call is transmitted to the management server 221, for example, to confirm whether the model information of the UE 100 serving as the originating call of the call is the model information included in the list managed by the management unit 221 And if the called party translation result of the received INVITE message is a subscriber to the second IMS network 300 as another business network which is distinguished from the first IMS network 200, It confirms the model information of the calling terminal based on the information of the terminal recorded in the User-Agent header and confirms whether or not the confirmed model information is the model information included in the list of the management section 221 .

The setting unit 227 sets the routing path of the VoLTE origination call to either the first path through the IBCF 230 or the second path through the BGCF 240 according to the above- For example, if the model information of the UE 100 as the calling terminal of the VoLTE origination call is model information not included in the list managed by the management section 221, the routing path of the invite message corresponding to the VoLTE origination call is IBCF 230 and if the model information of the UE 100 as a calling terminal of the corresponding VoLTE origination call is the model information included in the list of the management unit 221, The routing path of the message can be set to the second path through the BGCF 240. [

The processing unit 229 processes the VoLTE originated call through the first path or the second path established through the setting unit 227. For example, when routing through the first path, the first IMS network 200 The IBCF 230 of the first IMS network 200 and the IBCF 310 of the second IMS network 300 process the VoLTE call through the direct interworking between the IBCF 230 and the IBCF 310 of the second IMS network 300, And the BGCF / MGCF 410 of the legacy network 400 can process the corresponding VoLTE call.

3 is a flowchart of a VoLTE outgoing call processing method according to an embodiment of the present invention, and is applied to the apparatus of FIG.

First, the S-CSCF 200 of the first IMS network 200 stores and updates a model information list of a specific terminal, for example, a VoLTE direct interworking prohibition model list between providers, and continuously manages it (S310).

In a state in which the S-CSCF 200 of the first IMS network 200 manages the direct interworking prohibition model list as in step S310, a VoLTE outgoing call is generated from the UE 100 and the INVITE message is transmitted to the first The P-CSCF 210 transmits the invite message of the VoLTE originated call to the S-CSCF 200 of the first IMS network 200 when the P-CSCF 210 of the IMS network 200 receives the P-CSCF 210 in step S320 (S330).

When the S-CSCF 220 of the first IMS network 200 translates the called number of the received invite message and the called party is a subscriber of the second IMS network 300 which is distinguished from the first IMS network 200 (S340). The system checks the model information of the calling terminal based on the information of the terminal recorded in the user-agent header of the INVITE message, and the checked model information is managed in step S310 And if the model information of the UE 100 as the calling terminal is model information not included in the management list in step S310, the routing path of the corresponding inbound message is set to If the model information of the UE 100 as the calling terminal is the model information included in the management list of step S310, the routing path of the corresponding invite message is set to be the first route through the BGCF 240 2 path (S350).

Finally, the S-CSCF 220 of the first IMS network 200 processes the invite message of the corresponding VoLTE origination call through either the first path or the second path established through step S350 (S360 or S370).

CSCF 220 of the first IMS network 200 routes to the first IMS network 200 in the case of step S360 in which the S-CSCF 220 of the first IMS network 200 routes through the first path The IBCF 230 of the first IMS network 200 transmits the corresponding byte message to the IBCF 230 of the second IMS network 200 at step S361 (Step S362). The IBCF 310 of the second IMS network 300 transmits a 200 OK message to the IBCF 230 of the first IMS network 200 in response to the invite message received in step S362 The 200 OK message is transmitted from the IBCF 230 of the first IMS network 200 to the UE 100 through the S-CSCF 220 and the P-CSCF 210 of the first IMS network 200 Communication is established between the caller and the called party (S364 to S366).

CSCF 220 of the first IMS network 200 routes the first IMS network 200 to the first IMS network 200. In another embodiment, the S-CSCF 220 of the first IMS network 200 routes through the second path, The BGCF 240 of the first IMS network 200 transmits the corresponding byte message to the BGCF 240 of the legacy network 400, The BGCF / MGCF 410 forwards the 200 OK message to the S-CSCF 220 of the first IMS network 200 in response to the Invite message received in step S371 (step S372) The corresponding 200 OK message is transmitted to the UE 100 through the S-CSCF 220 and the P-CSCF 210 of the first IMS network 200 to establish communication between the calling party and the called party (S373 to S374).

As described above, the VoLTE outgoing call processing method according to various embodiments of the present invention can be implemented as a computer-readable recording medium (or application) including program instructions for performing various computer-implemented operations. The computer-readable recording medium may include a program command, a local data file, a local data structure, or the like, alone or in combination. The recording medium may be those specially designed and constructed for the embodiments of the present invention or may be those known to those skilled in the computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floppy disks, and ROMs, And hardware devices specifically configured to store and execute the same program instructions. The recording medium may be a transmission medium such as an optical or metal line, a wave guide, or the like, including a carrier wave for transmitting a signal designating a program command, a local data structure, or the like. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: UE (User Equipment)
200: First IMS network
210: Proxy-Call Session Control Function (P-CSCF) of the first IMS network.
220: Serving-Call Session Control Function (S-CSCF) of the first IMS network
221: Manager
223:
225:
227: Setting section
229:
230: IBCF (Interconnection Border Control Function) of the first IMS network;
240: Breakout Gateway Control Function (BGCF) of the first IMS network
300: Second IMS network
310: IBCF (Interconnection Border Control Function) of the second IMS network.
400: Legacy network
410: Media Gateway Control Function (MGCF)

Claims (11)

A VoLTE origination call processing apparatus included in an S-CSCF of an IMS network of a first LTE network,
A management unit for managing a list of model information of a specific terminal;
A receiver for receiving a VoLTE outgoing call originated from a subscriber of the first LTE network;
A confirmation unit for confirming whether the model information of the calling terminal of the VoLTE originated call is the model information included in the list of the management unit when the received VoLTE outgoing call is the subscriber of the second LTE network as the called party;
A setting unit for setting a routing path of the VoLTE origination call to a first path through an IBCF or a second path through a BGCF according to an identification result of the confirmation unit; And
And a processing unit for processing the VoLTE originated call through a first path or a second path set through the setting unit. The method according to claim 1,
Wherein the confirmation unit confirms the model information of the calling terminal based on the information of the terminal recorded in a User-Agent header of an INVITE message corresponding to the VoLTE originated call. Call processing device. The method according to claim 1,
Wherein the setting unit sets the routing path of the VoLTE origination call to the first path when the model information of the calling terminal of the VoLTE originated call is model information not included in the list of the management unit, And sets the routing path of the VoLTE origination call as the second route when the type information is included in the list of the management unit. The method according to claim 1,
Wherein the first LTE network and the second LTE network are networks of different carriers (communication companies). A VoLTE originated call processing method included in an S-CSCF of an IMS network of a first LTE network,
(a) managing a list of model information of a specific terminal;
(b) receiving a VoLTE outgoing call originated from a subscriber of the first LTE network;
(c) if the received VoLTE origination call is a subscriber of the second LTE network, checking whether the model information of the calling terminal of the VoLTE originated call is the model information included in the list;
(d) setting a routing path of the VoLTE origination call to a first path through an IBCF or a second path through a BGCF according to a result of the checking in step (c); And
(e) processing the VoLTE originated call through the first path or the second path set in step (d). 6. The method of claim 5,
Wherein the step (c) identifies the model information of the calling terminal based on the information of the terminal recorded in a User-Agent header of an INVITE message corresponding to the VoLTE originated call A VoLTE outgoing call processing method. 6. The method of claim 5,
Wherein the step (d) sets the routing path of the VoLTE origination call to the first path when the model information of the calling terminal of the VoLTE origination call is model information not included in the list, Is a type information included in the list, sets the routing path of the VoLTE origination call as the second route. 6. The method of claim 5,
Wherein the first LTE network and the second LTE network are networks of different operators (communication companies). A computer-readable recording medium having recorded thereon a program for causing a computer to execute the VoLTE originated call processing method according to any one of claims 5 to 8. 9. An application program stored on a computer readable medium for executing the VoLTE originated call processing method of any of claims 5-8 in combination with hardware. 9. A computer program stored on a computer readable medium for causing a computer to execute the VoLTE originated call processing method of any one of claims 5-8.

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