KR100271308B1 - An outgoing call control method for imt-2000 service - Google Patents

Abstract

The present invention relates to a call processing method using an intelligent network call model for providing an IMT-2000 service. The present invention relates to a mobile station center from a transmitting mobile station of an intelligent network performing an IMT-2000 service. How to handle outgoing calls.

The present invention obtains an international mobile user identity (IMUI) of a transmitting user from a predetermined service control function unit (SCF) connected to the transmitting mobile communication switching center, and performs authentication operations for the transmitting user and encryption of a radio link. The process of acquiring network access authority to be performed, the process of confirming whether the sender has subscribed to the desired service, the process of acquiring a routing address to obtain a routing address for data transmission with the receiver, and the service resource for the call connection. A call establishment process to check whether there is a call, a call connection process to connect a sending user and a receiving user to each other, and a call to monitor whether there is a request for communication service with a new user or a request for modification of existing connection information for the call. Activation phase.

According to the present invention, when the IMT-2000 service user dials the address of the receiver for communication, there is an effect that the call can be called from the viewpoint of the intelligent network.

Description

An outgoing call control method using intelligent network call model for International Mobile Telecommunications-2000 services

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call processing method in an intelligent network, and in particular, a call made by a predetermined sender user to receive an IMT-2000 service is received through a mobile station center that manages a corresponding mobile station. It relates to the call processing method handed to the side.

IMT-2000 (International Mobile Telecommunications-2000) is a third generation mobile telecommunications system standardized for service around 2000 by ITU (International Telecommunication Union) with global participation in Europe, USA and Japan.

1 is a diagram illustrating a network for providing an IMT-2000 service, and includes a mobile station 110, a base station 120, a base station controller 130, and a mobile switching center 140. ), A service controller 160 (Service Control Point), a VLR (Visitor Location Register), and a service data system 170 (Service Data Point).

In this case, the mobile station 110 includes a Call Control Access Function (CCAF) 111 and a Terminal Access Control Agent Function (TACAF 112), and the CCAF 111 is a functional element that performs a service access function for a user. The TACAF 112 is a functional element that provides a connection for a mobile terminal, such as controlling a bearer and performing paging.

In addition, the base station controller 130 is provided with a terminal access control function unit (TACF) 131 which performs a relationship setting and overall control function between the mobile station 110 and the network, and the mobile communication switching station 140 has a service exchange function. A service exchange function unit 141 which performs a service exchange function unit 141 (SSF), a call control function unit 142 (CCF) which processes a call or a connection, and a service access control unit 143 which performs a control function not related to a call or bearer. SACF) and the like.

The VLR 150 includes a location registration control unit 151 (LRCF) that performs mobility control logic for location registration. The service controller 160 includes a service control unit 161 (SCF) that performs a service control function. Is provided.

In addition, the service data system 170 includes a service data function unit 171 (SDF). The service data function unit 171 is a user who can access in real time from the service control function unit 161 to provide an intelligent network service. It has information about the network.

In the wireless switching network, a wide area is divided into small areas called cells for effective use of radio resources, and the base station 120 is placed in one or more cells so that the base station 120 communicates with the mobile station 110 wirelessly.

Accordingly, the base station 120 transmits a voice, data, or control signal to the mobile station 110 in a cell under its control through a wireless channel. On the contrary, the base station controller receives the voice, data, or control signal of the mobile station 110 through a wired line. It passes the 130 to the mobile communication switching center 140.

At this time, the mobile communication switching center 140 provides a circuit switching service for interworking with a fixed telephone network, and the VLR 150 has location information on all subscribers currently serving by the mobile communication switching center 140. .

Meanwhile, in order to perform IMT-2000 service using such an intelligent network, when an IMT-2000 service user dials an address of a receiver for communication, a method of calling a corresponding call is required.

Accordingly, the present invention has been made to meet the above needs, and when the IMT-2000 service user dials the address of the receiver for communication, a method for calling a corresponding call, that is, for providing IMT-2000 service The purpose is to provide a call processing method using an intelligent network call model.

In order to achieve the above object, a call processing method using an intelligent network call model for providing an IMT-2000 service according to the present invention includes an IMUI of a transmitting user in a predetermined service control function unit (SCF) connected to a transmitting mobile communication switching center. Acquiring an International Mobile User Identity and acquiring a network access authority for performing an authentication operation and an encryption of a radio link with respect to the sending user; A service subscription checking step of confirming whether the sending user subscribes to a desired service; Obtaining a routing address for obtaining a routing address for data transmission with a receiving side; Call setup process for checking whether there is a service resource for the call connection; A call connection process of connecting the sender user and the receiver user; And a call activation step of monitoring whether there is a communication service request with a new user or a request for modification of existing connection information for the call.

In this case, the network access authority acquisition process may include: transmitting, by the transmitting mobile station, a signal (TA SETUP req. Ind.) Requesting terminal access to a predetermined terminal access control function (TACF); The terminal access control function unit (TACF) sending a signal (TA SETUP PERMISSION req. Ind.) To request a permission for the terminal access request to a predetermined service control function; Obtaining, by the service control function unit, an IMT-2000 user ID to obtain an international mobile user identity (IMUI) of the transmitting user; A user authentication and radio link encryption step of performing an authentication operation on the transmitting user and an encryption operation on the corresponding radio link; Communicating with a predetermined service data function by the service control function to update a state of the transmitting mobile station and storing corresponding routing information; Transmitting, by the service control function, a response signal (TA SETUP PERMISSION resp.conf.) To the terminal access control function in response to the permission request signal related to the terminal access request; And transmitting, by the terminal access control function, a response signal (TA SETUP resp.conf.) To the transmitting mobile station.

In addition, the service subscription confirmation step may include the step of sending a call setup request signal (SETUP req. Ind.) By the transmitting mobile station to the transmitting mobile communication switching station; Sending, by the transmitting mobile communication switching center, a signal (CALL SETUP PERMISSION req. Ind.) Requesting permission to set up a call to the service control function unit; Sending, by the service control function, a signal (USER PROFILE RETRIEVAL req. Ind.) Requesting acquisition of the transmitting user profile to the service data function; Transmitting, by the service data function unit, a response signal (USER PROFILE RETRIEVAL resp. Conf.) To the service control function unit; And the service control function unit checks a profile of the sending user, checks whether the sending user has permission to use the service, and then responds to a signal for requesting permission to set up the call to the sending mobile communication switching center. And sending a signal (CALL SETUP PERMISSION resp.conf).

The routing address acquiring process may include: sending, by the transmitting mobile communication switching center, a signal for requesting routing information to the service control function unit (REQUEST ROUTING INFO req. Ind.); The service control function unit communicating with the service data function unit to obtain corresponding routing information; And sending a response signal (REQUEST ROUTING INFO resp.conf.) To the transmitting mobile communication switching center to the transmitting mobile communication switching center.

On the other hand, the call connection process includes the step of sending the IAM (Initial Address Message) to the predetermined mobile communication switching station by the transmitting mobile communication switching station; Sending an acknowledgment (ACM) for the IAM message from the receiving mobile communication switching center to the transmitting mobile communication switching center; The transmitting mobile communication switching station waiting for a predetermined response message from the receiving mobile communication switching station after calling the transmitting mobile station; The transmitting mobile communication switching center receiving a response message (ANM) from the receiving mobile communication switching center; And sending the response signal (SETUP resp.conf.) To the calling mobile station by the transmitting mobile communication switching center to the call setup request signal (SETUP req. Ind.).

1 is a network diagram for providing an IMT-2000 service;

2 is a flowchart of a call processing method of the present invention;

3 is a detailed sequence chart of the call processing method of the present invention.

* Explanation of symbols for main parts of the drawings

110: mobile station (MS) 111: CCAF

112: TACAF 120: base station (BS)

130: base station controller (BSC) 131: terminal access control function (TACF)

140: mobile communication switching center (MSC) 141: service switching function (SSF)

142: call control function 143: service access control function (SACF)

150: VLR 151: position registration control function (LRCF)

160: service controller (SCP) 161: service control function (SCF)

170: service data system (SDP) 171: service data function (SDF)

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

2 is a flowchart of a call processing method of the present invention, and FIG. 3 is a detailed flowchart of the call processing method of the present invention.

First, the network access authority acquisition process P210 obtains the IMUI (International Mobile User Identity) of the sender user from a predetermined service control function unit 161 (SCF) connected to the sender mobile communication switching center 140 (MSC). This is a process of performing authentication work for the sending user and encryption of the wireless link.

When the IMT-2000 service user dials the recipient's address for communication, that is, when the mobile station 110 wants to communicate with a fixed station or another mobile station of the wired network, the user must first obtain access to the network. . At this time, the actual call establishment request is detected by the transmitting mobile communication switching center 140.

TA SETUP req.ind requesting terminal access to the TACF 131 from the mobile station 110, which is the first step of the network access authority acquisition process (S210). To describe the process of message transmission in detail, in the IMT-2000, the CCAF 111 sends a TA SETUP req.ind. Message to the terminal access control unit 131 (TACF) in which the TACAF 112 is located in the base station controller 130 (BSC). It will send a message.

TA SETUP req.ind. The terminal access control function unit 131 (TACF) receiving the message sends a signal (TA SETUP PERMISSION req. Ind.) Requesting permission for the terminal access request to the predetermined service control function unit 161.

Then, the service control function unit 161 obtains the International Mobile User Identity (IMUI) of the transmitting user (IMT-2000 user ID acquisition step). After obtaining the IMUI of the sender user, authentication for the sender user and encryption for the corresponding radio link are performed (user authentication and radio link encryption step).

The service control function unit 161 communicates with the service data function unit 171 connected thereto to update the state of the transmitting mobile station 110 and to store the routing information, which is received from the receiving side. This is to transfer the data correctly to the sender.

The service control function unit 161 transmits a response signal (TA SETUP PERMISSION resp.conf.) To the terminal access control function unit 131 in response to the permission request signal related to the terminal access request, and again, the terminal access control function unit 131. Transmits a response signal (TA SETUP resp.conf.) To the terminal access request to the transmitting mobile station 110, so that the transmitting user obtains the right to access the network.

The service subscription check process (P220) is a process of confirming whether the sender has subscribed to the desired service.

At this time, the intelligent network service logic is performed, and the service exchange function unit 141 (SSF), which is a functional element of the transmitting-side mobile communication switching center 140, requests the service control function unit 161 (SCF) to allow call setup. CALL SETUP PERMISSION req. ind. Send a message to request authentication of the user requesting service. The service control function unit 161 then checks the service profile of the user from the service data function unit 171 (SDF) to check whether the user has a right to use the corresponding service.

More specifically, when the transmitting mobile station 110 transmits a call setup request signal (SETUP req. Ind.) To the transmitting mobile communication switching station 140, the transmitting mobile communication switching station 140 transmits a service control function. Sends a signal (CALL SETUP PERMISSION req. Ind.) To request call permission to (161).

Then, the service control function unit 161 sends a signal (USER PROFILE RETRIEVAL req. Ind.) Requesting the acquisition of the transmitting user profile to the service data function unit 171, and the service data function unit 171 controls the service. The function unit 161 sends a response signal (USER PROFILE RETRIEVAL resp.conf.) To the user profile acquisition request.

Then, the service control function unit 161 checks the profile of the sender user and checks whether the sender user has permission to use the corresponding service, and requests the call setup permission from the sender mobile communication switching center 140. Send a response signal (CALL SETUP PERMISSION resp.conf).

The process of acquiring the routing address (P230) is a process of obtaining a routing address for data transmission with the receiver, and the CALL SETUP PERMISSION resp. conf. It is performed when a message is received.

That is, at this point, a routing address for transmitting data to the receiving side is obtained. For example, when an intelligent network service such as a toll-free service is required, a process of converting the intelligent network service number into an actual number is performed by the service control function unit 161. ) To interact with it.

Referring to this process (P230) in detail, when the transmitting mobile communication switching station 140 sends a signal (REQUEST ROUTING INFO req. Ind.) For requesting routing information to the service control function unit 161, the service control function unit ( 161 communicates with the service data function 171 to obtain the corresponding routing information.

Then, the service control function unit 161 transmits a response signal (REQUEST ROUTING INFO resp.conf.) To the transmitting-side mobile communication switching center 140 in response to the routing information request signal.

The call setup step (S240) is a step of checking whether there is a service resource for a corresponding call connection, and is a step of checking whether enough service resources remain to establish a connection between a transmitting side and a receiving side.

The call connection process P250 is a process of connecting the sending user and the receiving user. That is, a B-ISDN User Part (B-ISUP) Initial Address Message (IAM) message is transmitted to a receiving mobile communication switching center (not shown) to inform that there is a communication request, and then a response message (ANM: ANswer Message) is sent. waiting. When the ANM message is received, it is detected and notified to the mobile station that the call is established, and then the call activation step S260 is performed.

At this time, an ACM (Address Complete Message) is a message transmitted from the receiving mobile communication switching center after sending an alarm signal to the receiving party.

The process P250 will be described in detail. The transmitting mobile communication switching station 140 sends an IAM (Initial Address Message) to a predetermined receiving mobile communication switching station, and the receiving mobile communication switching center 140 transmits the transmitting mobile communication switching station 140. Send an acknowledgment (ACM) to the IAM message

Then, after calling the transmitting mobile station 110, the transmitting mobile communication switching station 140 waits for a predetermined response message (ANM) from the receiving mobile communication switching station.

When a response message (ANM) is received from the receiving mobile communication switching center by the transmitting mobile communication switching center 140, the transmitting mobile communication switching center 140 responds to the call setup request signal (SETUP req. Ind.). resp.conf.) to the transmitting mobile station 110, where the transmitting side and the receiving side are connected to each other.

Finally, in the call activation step (S260), it is a step of monitoring whether there is a communication service request with a new user or a request for modification of existing connection information for the call. At this time, the transmitting side and the receiving side are already connected to each other in the call connection step (P250).

As described above, when the IMT-2000 service user dials the address of the receiver for communication, there is an effect that the call can be called from the viewpoint of an intelligent network.

Claims (5)

A method for processing an outgoing call from a transmitting mobile station 110 (MS) of an intelligent network performing an IMT-2000 service through a transmitting mobile communication switching center 140 (MSC), the transmitting mobile communication switching center 140 Obtains an international mobile user identity (IMUI) of a sending user from a predetermined service control function unit 161 (SCF), and acquires network access authority for performing an authentication operation and encryption of a wireless link for the sending user. process; A service subscription checking step of confirming whether the sending user subscribes to a desired service; Obtaining a routing address for obtaining a routing address for data transmission with a receiving side; Call setup process for checking whether there is a service resource for the call connection; A call connection process of connecting the sender user and the receiver user; And Calling using an intelligent network call model for providing IMT-2000 service, comprising a call activation step for monitoring whether there is a communication service request with a new user or a request for modification of existing connection information for the call Treatment method. 2. The method of claim 1, wherein the network access authority acquisition process transmits a signal (TA SETUP req. Ind.) For requesting terminal access to a predetermined terminal access control function unit 131 (TACF). step; The terminal access control function unit 131 sending a signal (TA SETUP PERMISSION req. Ind.) Requesting permission for the terminal access request to a predetermined service control function unit 161; The service control function unit 161 may include: obtaining an IMT-2000 user ID for obtaining an international mobile user identity (IMUI) of the transmitting user; A user authentication and radio link encryption step of performing an authentication operation on the transmitting user and an encryption operation on the corresponding radio link; The service control function unit 161 communicating with a predetermined service data function unit 171 to update a state of the transmitting-side mobile station 110 and to store corresponding routing information; The service control function unit 161 sends a response signal (TA SETUP PERMISSION resp.conf.) To the terminal access control function unit 131 in response to the permission request signal related to the terminal access request; And The terminal access control function unit 131 is configured to include a step of sending a response signal (TA SETUP resp.conf.) For the terminal access request to the transmitting-side mobile station (110). Call processing method using intelligent network call model 2. The method of claim 1, wherein the service subscription checking step comprises: sending, by the transmitting mobile station (110), a call setup request signal (SETUP req. Ind.) To the transmitting mobile communication switching center (140); Sending a signal (CALL SETUP PERMISSION req. Ind.) Requesting permission to set up a call to the service control function unit 161; The service control function unit 161 sending a signal (USER PROFILE RETRIEVAL request) to the service data function unit 171 to request acquisition of the user profile of the transmitting side; The service data function unit 171 sending a response signal (USER PROFILE RETRIEVAL resp.conf.) To a service profile acquisition request to the service control function unit 161; And The service control function unit 161 checks the profile of the sender user to check whether the sender user has a right to use the service, and then grants the call setup permission to the sender mobile communication switching center 140. Sending a response signal (CALL SETUP PERMISSION resp.conf) for the request signal comprising the call processing method using the intelligent network call model for providing IMT-2000 services. The method of claim 1, wherein the obtaining of the routing address comprises: sending, by the transmitting-side mobile communication switching station, a signal for requesting routing information to the service control function unit 161 (REQUEST ROUTING INFO req. Ind.); The service control function unit 161 is configured to communicate with the service data function unit 171 to obtain routing information for obtaining routing information; And The service control function unit 161 is configured to include a step of sending a response signal (REQUEST ROUTING INFO resp.conf.) For the routing information request signal to the transmitting mobile communication switching center 140. -2000 A call processing method using an intelligent network call model for providing a service. 2. The method of claim 1, wherein the call connection process comprises the steps of: sending, by the transmitting mobile communication switching center, an initial address message (IAM) to a predetermined receiving mobile communication switching center; Sending an acknowledgment (ACM) for the IAM message from the receiving mobile communication switching center to the transmitting mobile communication switching center (140); The transmitting mobile communication switching station 140 calling the transmitting mobile station and waiting for a predetermined response message from the receiving mobile communication switching station; The sending mobile communication switching center receiving a response message (ANM) from the receiving mobile communication switching center; And The transmitting-side mobile communication switching center 140 includes a step of sending a response signal (SETUP resp.conf.) To the transmitting-side mobile station 110 in response to the call setup request signal (SETUP req. Ind.). Call processing method using an intelligent network call model for providing an IMT-2000 service.