KR100775540B1 - Method and device for processing register location of terminal in ims network - Google Patents

Abstract

A method and an apparatus for processing terminal location registration in an IMS(IP Multimedia Subsystem) network are provided to allow a terminal to perform call processing for entering a state under a session controller when the terminal is turned on and first registers its location. When a terminal(10) is turned on in a turn-off state, the terminal(10) transmits a registration request message to an IMS network(100) to register its location to an HSS(Home Subscriber Server)(170) of the IMS network(100). When the terminal(10) receives a response message according to a successful registration from the IMS network(100), the terminal(10) immediately transmits a log-in request message(SUBSCRIBER) to a CSCF(Call Session Control Function)(110). The CSCF(110) provides state information of the terminal(10) to one or more previously designated ASs(Application Servers)(130).

Description

Method and device for processing location registration in IMS network TECHNICAL FIELD

1 is a schematic diagram showing an overall system for processing a call in an IMS network according to an embodiment of the present invention.

2 to 4 are flowcharts illustrating a terminal location registration processing procedure in an IMS network according to each preferred embodiment of the present invention.

Figure 5 is a block diagram showing the configuration according to the function of the terminal to register the location in the IMS network according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: terminal

30: access network

100: IMS (IP Multimedia Subsystem) Network

110: session control device

130: application server

150: a media processing function

170: Home Subscriber Server

190: Gateway (G / W)

The present invention relates to a location registration of a terminal, and more particularly, to a method and apparatus for processing a terminal location registration in an IMS network.

Recently, there are not only circuit switching based communication networks such as CDMA (Code Division Multiple Access) networks, but also packet switching based communication networks, especially IP based communication. IMS network is used.

The IMS network is a communication network based on a communication network standard proposed by the 3rd Generation Partnership Project (3GPP). The IMS network provides an IP-based communication service and mainly uses a signaling protocol such as a Session Initiation Protocol (SIP).

A terminal subscribed to the IMS network (hereinafter referred to as an 'IMS terminal') attempts to register a location with a location register (eg, HSS: Home Subscriber Server) of the IMS network when it is turned on.

Subsequently, the IMS terminal delivers a SUBSCRIBE message, which is a request message for managing a session control device (for example, call session control function (CSCF)) in order to receive a service provided by the IMS network. That is, the IMS terminal transmits a SUBSCRIBE message for logging into the session control device to the session control device.

Accordingly, the session control apparatus of the IMS network manages state information such as location information of the corresponding IMS terminal, processes relocation registration, reauthentication, and the like, and may provide any service requested thereafter.

Here, in order for the IMS terminal to receive any IMS service such as a video call, it is necessary to perform both a location registration to the HSS and a subscription transmission to the session control device.

Therefore, in the IMS network, call processing according to location registration and call processing for IMS terminal management of the session control apparatus are separately performed, so that a process of recognizing and authenticating the corresponding terminal may be duplicated in each call processing. It did not provide the simplicity of the call processing procedure.

Accordingly, the present invention has been made to solve the above-mentioned problem, when the terminal is powered on (ON) when registering for the first time, the call processing procedure by performing a call processing for entering under the management of the session control apparatus together It is an object of the present invention to provide a method and apparatus for processing terminal location registration in an IMS network that can be simplified.

In addition, the present invention is the terminal location in the IMS network that allows the application server (AS: Application Server) that provides a specific service using the terminal information such as location information during the location registration process of the terminal to manage the terminal information. Another object is to provide a registration processing method and apparatus.

Other objects of the present invention will become more apparent through the preferred embodiments described below.

According to an aspect of the present invention for achieving the above object, in the method for registering an IMS (IP Multimedia Subsystem) terminal in the IMS network, when the power is turned on (OFF) in the power OFF state (ON) the IMS network Transmitting a registration request message for location registration to a home subscriber server (HSS) of the IMS network; And transmitting a login request message SUBSCRIBE to a session control device of the IMS network immediately after receiving a response message according to a successful registration from the IMS network, wherein the session control device manages state information of the terminal. There is provided a recording medium on which a location registration processing method and a program for executing the method are recorded.

Here, the session control device may provide the state information of the terminal to one or more predetermined application server (AS).

In addition, the session control device may be a Serving-Call Session Control Function (S-CSCF), and the S-CSCF may provide the status information to the Proxy-Call Session Control Function (P-CSCF).

In addition, the status information may include information on whether the terminal is logged in / logoff.

According to another aspect of the present invention for achieving the above object, in a method for processing the location registration of the terminal by the session control device (CSCF) of the IMS network, according to the registration request message received from the terminal to the corresponding HSS Registering location information of the terminal; Transmitting a response message according to the registration request message to the terminal; Receiving a login request message from the terminal receiving the response message; And providing the state information of the terminal to one or more predetermined application servers.

Here, the status information may include information on whether the terminal is logged in / logoff.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present 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.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in describing the present invention with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals regardless of the reference numerals. Duplicate explanations will be omitted.

1 is a schematic diagram showing an overall system for processing a call in an IMS network according to an embodiment of the present invention.

Referring to FIG. 1, an IMS (IP Multimedia Subsystem) network 100 is a communication network based on a communication network standard proposed by a 3rd generation partnership project (3GPP), and provides an IP-based communication service, and mainly includes a SIP (Session Initiation Protocol). Uses a signaling protocol.

The access network 30 is a mobile communication network to which the terminal 10 can access an IMS network. For example, the access network 30 may be a wide-band code division multiple access (WCDMA) network. That is, the IMS network 100 may be used as an auxiliary network of a mobile communication network such as a WCDMA network, which will be apparent to those skilled in the art. Of course, unlike the illustrated in the figure it will be appreciated that the access network and the IMS network 100 may be implemented as one communication network without being distinguished from each other.

The IMS network 100 includes a session control device 110 (CSCF), an HSS (170, Home Subscriber Server), for session control according to a gateway 190 (G / W), a call, etc. connected to the access network 30, The application server 130 includes an application server (AS) and a media processing unit 150 (Multimedia Resource Function (MRF)).

As shown in the figure, the session control apparatus 110 of the IMS network 100 may be a Call Session Control Function (CSCF). Of course, it will be more apparent from the following description that not only the CSCF but also all devices controlling the call session can be implemented equally as the session control device. Hereinafter, the session control apparatus 110 will be described with an example of being a CSCF. The CSCF 110 registers the subscribed mobile terminal with the HSS 170 and performs the function of routing SIP signaling to the appropriate server.

As shown in the figure, the CSCF 110 may include a Proxy CSCF 112 (P-CSCF), a Serving CSCF 116 (S-CSCF), and an Interrogating CSCF 114 (I-CSCF). The P-CSCF 112 performs the same function as a SIP proxy server. The P-CSCF 112 performs compression / decompression of SIP messages, authentication and QoS measurement of bearer resources, and a SIP register request from a terminal. Performs a function of forwarding to the CSCF 114, and the like. The S-CSCF 116 controls the session for the terminal and functions to maintain session state for service maintenance. I-CSCF 114 receives the SIP request from another network and routes it to S-CSCF 116, which obtains the address of S-CSCF 116 from HSS 170. That is, I-CSCF 114 functions to forward SIP requests and responses to S-CSCF 116. Since the P-CSCF 112, S-CSCF 116 and I-CSCF 114 will be apparent to those skilled in the art, further detailed description will be omitted.

The media processing apparatus 150 is a device that performs a function of controlling a media stream resource, and may include a multimedia resource function controller (MRFC) and a multimedia resource function processor (MRFP). The MRFP mixes and processes media streams, and the MRFC functions to control media stream resources within the MRFP. MRFC and MRFP will be apparent to those skilled in the art, so detailed description thereof will be omitted.

AS 130 provides video conference call service, video conference call based technology, video conference call media control, intelligent network prepaid billing processing, billing information transmission, voice control function when performing Push-To-Talk (PTT) function, announcement broadcasting It is a device for providing application functions such as ring-back-tone function. Of course, one AS 130 may provide all application functions, but a plurality of AS 130 may provide application functions according to respective functions.

The HSS 170 is developed from the Home Location Register (HLR) of mobile communication and is a centralized database for managing subscriber information. The HSS 170 performs functions such as user registration / change management, authentication, authorization, location, session routing, and billing.

The IMS network 100 may further include other devices, such as a separate gateway that serves to connect other IMS networks with the Public Switched Telephone Network (PSTN) and other existing networks and carrier operations support systems. Will be self-evident.

The terminals 10-1, 10-2,..., 10-n, hereinafter referred to as 10, are mobile communication terminals capable of processing SIP signaling, and not only mobile phones but also personal digital assistants (PDAs). It will be more apparent through the following description that all communication devices capable of performing IP-based communication can be implemented in the same manner.

According to the present embodiment, the terminal 10 registers a location to the HSS 170 at the time of initial location registration, and immediately sends a login request message (ie, a subscription SUBSCRIBE) to log in to the CSCF 110. . For convenience of explanation, the procedure for registering a location in the HSS 170 will be referred to as a first call processing and a procedure for logging in by sending a SUBSCRIBE message to the CSCF 110 will be referred to as a second call processing.

That is, when the first call processing ends, the terminal 10 immediately transmits a SUBSCRIBE message for the second call processing to the session control apparatus 110 (CSCF) of the IMS network 100.

Hereinafter, a location registration processing procedure of the terminal 10 in the IMS network 100 according to the present embodiment will be described.

2 to 4 are flowcharts illustrating a terminal location registration processing procedure in an IMS network according to each preferred embodiment of the present invention.

Referring to FIG. 2, when the power is turned on in the power-off state (power off), the terminal 10 registers the location to the HSS 170 of the IMS network 100 for the first call processing procedure. A REGISTER message (ie, a registration request message for location registration) is sent to the P-CSCF 112 (step 210).

The first call processing procedure is illustrated in the drawings and is still applied to the IMS network 100 and will be apparent to those skilled in the art.

The P-CSCF 112 finds the address of the I-CSCF 114 through the Domain Name Server (DNS) from the home domain name included in the registration request message received from the terminal 10. At this time, the P-CSCF 112 inserts the address and identifier information of the P-CSCF 112 into the registration request message and transmits the information to the I-CSCF 114 of the found address (step 212).

The I-CSCF 114 performs an SLF query and a subscriber locator function (SLF), which is an authentication process for obtaining an HSS address to which a subscriber belongs by referring to a registration request message received from the P-CSCF 112 (step 214). The authentication request message (User-Authentication-Request: UAR) is forwarded to the HSS 170 (step 216). The authentication request message is for inquiring status information about whether the user is registered and whether the user can roam the current visited network, and to obtain information of the S-CSCF 116.

The HSS 170 transmits an authentication response message (User-Authentication-Answer: UAA) to the I-CSCF 114 in response to the authentication request message (UAR) received from the I-CSCF 114 (step 218). The authentication response message includes result information and information of the S-CSCF 116 according to whether the corresponding terminal 10 is already registered and whether roaming is possible in the visited network.

The I-CSCF 114 selects the S-CSCF 116 by referring to the I-CSCF 114 information included in the authentication response message (UAA) received from the HSS 170, and selects the selected S-CSCF 116. The registration request according to the registration request message transmitted from the terminal 10 is transmitted (step 220).

After receiving the registration request sent from the I-CSCF 114, the S-CSCF 116 sends a Sever-Assignment-Request (SAR) to the SLF to obtain the HSS address to which the subscriber belongs. (Step 222). In response to the server allocation request message (SAR) received from the S-CSCF 116, the SLF sends a server assignment response message (Sever-Assignment-Answer: SAA) including the address information of the HSS 170 to the S-CSCF (116). (Step 224). The S-CSCF 116 stores information on this (step 226), and sends a response message to the terminal 10 via the I-CSCF 114 and the P-CSCF 112 (steps 228 to 232). .

When the terminal 10 receives a response to the REGISTER message for registering a location from the IMS network 100 to the HSS 170 (step 232), the terminal 10 immediately sends a SUBCRIBE message for the second call processing procedure to the IMS network 100. Transmit (step 250). Similarly, the second call processing procedure is also shown in the drawings and is still applied to the IMS network 100 and will be apparent to those skilled in the art, so a detailed description thereof will be omitted.

Status information of the terminal 10 among the P-CSCF 112, I-CSCF 114, and S-CSCF 116 in the CSCF 110 (eg, an ON / OFF state, that is, It is the P-CSCF 112 and the S-CSCF 116 that manage the LOG-IN / LOG-OUT status. Accordingly, since the state information between the P-CSCF 112 and the S-CSCF 116 must be the same, according to an embodiment of the present invention, the call processing for the P-CSCF 112 to be managed by the S-CSCF 116 is performed. (See third call processing in FIG. 3) may be performed.

Call processing for this will be referred to as a third call processing hereinafter, and referring to FIG. 3 according to an embodiment, the third call processing may be performed after the second call processing is completed.

Therefore, when the state information of the terminal 10 is changed, the S-CSCF 116 notifies the corresponding information to the P-CSCF 112 (NOTIFY), so that the state information of the terminal 10 can be matched between the two devices. . Since the third call processing is still applied in the IMS network 100, a detailed description thereof will be omitted.

Among the application servers 130 (eg, Presence Sever, etc.) providing a specific service, there may be an AS 130 that manages or uses the state information of the terminal 10.

Referring to reference numeral 400 of FIG. 4 according to an embodiment of the present invention, the S-CSCF 116 may provide status information of the terminal 10 to the AS 130 as described above. That is, during the above-described second call processing and third call processing, as shown in the figure, the S-CSCF 116 requests the AS 130 to register the terminal 10 and manages state information. Sends a subscribe message for

Accordingly, in accordance with the initial position registration of the terminal 10 that is powered on, the state information management of the terminal 10 by the S-CSCF 116 is performed, and furthermore, the state information management of the terminal 10 is performed. Status information of the terminal 10 is also provided to the AS 130 as necessary. Therefore, according to the present exemplary embodiment, in which the first call processing process, the second call processing process, and the third call processing process are performed at a time as compared with the existing ones, the call processing procedure can be simplified, and then the IMS is transmitted to the terminal 10. In providing the service of the network 100, there is no need to provide the state information of the separate terminal 10 to the AS 130 or the S-CSCF 116, so that the call processing procedure may be simplified as compared with the conventional method.

5 is a block diagram showing the configuration according to the function of the terminal to register the location in the IMS network according to an embodiment of the present invention.

Referring to FIG. 5, the terminal 10 includes a communication unit 510, a storage unit 530, and a control unit 550, and the control unit 550 includes a SIP processing unit 552, a registration processing unit 554, and a terminal information management unit. 556 may include.

The communication unit 510 functions to allow the terminal 10 to perform communication through the IMS network 100, and the storage unit 530 is a memory for storing general information necessary for the terminal 10 to operate. The configuration and function of the communication unit 510 and the storage unit 530 for the terminal 10, such as a mobile phone to communicate through a communication network will be apparent to those skilled in the art, so detailed description thereof will be omitted.

When the power is supplied to the terminal 10 and the power is turned on, the controller 550 controls to register the location in the IMS network 100 through a predetermined frequency, and in particular, as described above, the first call processing and The communication unit 510 and the storage unit 530 are controlled to transmit a login request message SUBCRIBE to the IMS network 100 together with a registration request message for processing the second call processing.

The SIP processing unit 552 of the control unit 550 functions to control the communication unit 510 to communicate with the IMS network 100 using the SIP signaling protocol. The registration processor 554 registers the location information of the terminal 10 in the HSS 170 according to the registration request message received from the terminal 10. The terminal information manager 556 functions to store and manage state information of the terminal 10 in the storage unit 530 according to the login request message received from the terminal 10.

Of course, although not shown in the drawings, it is obvious that the terminal 10 may further include other components such as an input unit including an input means such as a button for input from a user.

The method of the present invention as described above may be implemented in a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention is not limited to the above embodiments, and many variations are possible by those skilled in the art within the spirit of the present invention.

As described above, according to the present invention, when the terminal is initially powered on and registers a location, an IMS that can simplify the call processing procedure by simultaneously performing call processing for entering into the session control apparatus. A terminal location registration processing method and apparatus in a network can be provided.

In addition, according to the present invention, the application server that provides a specific service using terminal information such as location information can also be processed at the time of registration of the terminal to process the call processing to manage the terminal information to simplify the call processing procedure. Can be.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art that various modifications of the present invention without departing from the spirit and scope of the invention described in the claims below And can be changed.

Claims (7)

In the method for the terminal to register the location in the IMS (IP Multimedia Subsystem) network, Transmitting a registration request message for location registration to a home subscriber server (HSS) of the IMS network when the power is turned on in a power off state; And If the response message according to the registration success from the IMS network is received, and immediately sending a login request message (SUBSCRIBE) to the session control device of the IMS network, And the session control device manages state information of the terminal. The method of claim 1, And the session control device provides status information of the terminal to at least one pre-specified application server (AS). The method of claim 1, The session control apparatus is a Serving-Call Session Control Function (S-CSCF), and the S-CSCF provides the status information to a Proxy-Call Session Control Function (P-CSCF). . The method of claim 1, And the status information includes information on whether the terminal is logged in or logged off. In the method of the session control device (CSCF) of the IMS network to handle the location registration of the terminal, Registering location information of the terminal with a corresponding HSS according to a registration request message received from the terminal; Transmitting a response message according to the registration request message to the terminal; Receiving a login request message from the terminal receiving the response message; And And providing status information of the terminal to at least one application server designated in advance. The method of claim 5, And the status information includes information on whether the terminal is logged in or logged off. In a recording medium in which a terminal is tangibly embodied to be executed in a digital processing device for registering a location in an IMS network, the program being readable by the digital processing device is recorded. Transmitting a registration request message for location registration to a home subscriber server (HSS) of the IMS network when the power is turned on in a power off state; And Upon receiving a response message according to a successful registration from the IMS network, immediately transmitting a login request message SUBSCRIBE to the session control apparatus of the IMS network, wherein the session control apparatus manages state information of the terminal. Recording medium that records the program being executed.

Images